From 3bbc5a255d54794f23032fbced841e5b5411d519 Mon Sep 17 00:00:00 2001 From: Tanmay Garg <40921153+tanmay2004@users.noreply.github.com> Date: Mon, 28 Sep 2020 00:41:27 +0530 Subject: [PATCH 001/613] Add files via upload --- docs/Ne4.svg | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/docs/Ne4.svg b/docs/Ne4.svg index 21011ac15..bf9402aa1 100644 --- a/docs/Ne4.svg +++ b/docs/Ne4.svg @@ -1,7 +1 @@ -aabbccddeeffgghh1122334455667788 + \ No newline at end of file From 2cca78f92c5879c684986a87c404068e18a556d5 Mon Sep 17 00:00:00 2001 From: Tanmay Garg <40921153+tanmay2004@users.noreply.github.com> Date: Mon, 28 Sep 2020 00:45:57 +0530 Subject: [PATCH 002/613] Add missing class of parameter in docs --- chess/svg.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/svg.py b/chess/svg.py index e99a6cb4e..dc287f968 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -187,7 +187,7 @@ def board(board: Optional[chess.BaseBoard] = None, *, :param flipped: Pass ``True`` to flip the board. :param coordinates: Pass ``False`` to disable the coordinate margin. :param lastmove: A :class:`chess.Move` to be highlighted. - :param check: A square to be marked as check. + :param check: A :class:`chess.Square` to be marked as being under check. :param arrows: A list of :class:`~chess.svg.Arrow` objects like ``[chess.svg.Arrow(chess.E2, chess.E4)]`` or a list of tuples like ``[(chess.E2, chess.E4)]``. An arrow from a square pointing to the same From 5ec66262eaf9deee44018806b792806eb1f365cb Mon Sep 17 00:00:00 2001 From: Tanmay Garg <40921153+tanmay2004@users.noreply.github.com> Date: Mon, 28 Sep 2020 10:26:15 +0530 Subject: [PATCH 003/613] Update Ne4.svg With help from @PedanticHacker --- docs/Ne4.svg | 186 ++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 185 insertions(+), 1 deletion(-) diff --git a/docs/Ne4.svg b/docs/Ne4.svg index bf9402aa1..f18f57b09 100644 --- a/docs/Ne4.svg +++ b/docs/Ne4.svg @@ -1 +1,185 @@ - \ No newline at end of file + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + From 0e96a7c18897effd41e7dc5ecc652bfd7e4d9b6a Mon Sep 17 00:00:00 2001 From: Tanmay Garg <40921153+tanmay2004@users.noreply.github.com> Date: Mon, 28 Sep 2020 13:15:34 +0530 Subject: [PATCH 004/613] Update svg.py --- chess/svg.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/svg.py b/chess/svg.py index dc287f968..e3c9369e5 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -187,7 +187,7 @@ def board(board: Optional[chess.BaseBoard] = None, *, :param flipped: Pass ``True`` to flip the board. :param coordinates: Pass ``False`` to disable the coordinate margin. :param lastmove: A :class:`chess.Move` to be highlighted. - :param check: A :class:`chess.Square` to be marked as being under check. + :param check: A :class:`chess.Square` to be marked indicating a check. :param arrows: A list of :class:`~chess.svg.Arrow` objects like ``[chess.svg.Arrow(chess.E2, chess.E4)]`` or a list of tuples like ``[(chess.E2, chess.E4)]``. An arrow from a square pointing to the same From d14d0da76732dc385b92f5fa8d26c5f1103da954 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 28 Sep 2020 14:04:15 +0200 Subject: [PATCH 005/613] Reorder chess.svg.board args --- chess/svg.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/chess/svg.py b/chess/svg.py index e3c9369e5..c511e4696 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -169,12 +169,12 @@ def piece(piece: chess.Piece, size: Optional[int] = None) -> str: def board(board: Optional[chess.BaseBoard] = None, *, - squares: Optional[IntoSquareSet] = None, flipped: bool = False, coordinates: bool = True, lastmove: Optional[chess.Move] = None, check: Optional[Square] = None, arrows: Iterable[Union[Arrow, Tuple[Square, Square]]] = [], + squares: Optional[IntoSquareSet] = None, size: Optional[int] = None, colors: Dict[str, str] = {}, style: Optional[str] = None) -> str: @@ -183,7 +183,6 @@ def board(board: Optional[chess.BaseBoard] = None, *, :param board: A :class:`chess.BaseBoard` for a chessboard with pieces or ``None`` (the default) for a chessboard without pieces. - :param squares: A :class:`chess.SquareSet` with selected squares. :param flipped: Pass ``True`` to flip the board. :param coordinates: Pass ``False`` to disable the coordinate margin. :param lastmove: A :class:`chess.Move` to be highlighted. @@ -192,6 +191,7 @@ def board(board: Optional[chess.BaseBoard] = None, *, ``[chess.svg.Arrow(chess.E2, chess.E4)]`` or a list of tuples like ``[(chess.E2, chess.E4)]``. An arrow from a square pointing to the same square is drawn as a circle, like ``[(chess.E2, chess.E2)]``. + :param squares: A :class:`chess.SquareSet` with selected squares. :param size: The size of the image in pixels (e.g., ``400`` for a 400 by 400 board) or ``None`` (the default) for no size limit. :param colors: A dictionary to override default colors. Possible keys are From 29bb0a0aff35dfdf477a52c421a6cc88dcc1d1d7 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 28 Sep 2020 14:06:20 +0200 Subject: [PATCH 006/613] Do not refer to type aliases as :class:, yet --- chess/svg.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/svg.py b/chess/svg.py index c511e4696..3edce4de1 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -186,7 +186,7 @@ def board(board: Optional[chess.BaseBoard] = None, *, :param flipped: Pass ``True`` to flip the board. :param coordinates: Pass ``False`` to disable the coordinate margin. :param lastmove: A :class:`chess.Move` to be highlighted. - :param check: A :class:`chess.Square` to be marked indicating a check. + :param check: A square to be marked indicating a check. :param arrows: A list of :class:`~chess.svg.Arrow` objects like ``[chess.svg.Arrow(chess.E2, chess.E4)]`` or a list of tuples like ``[(chess.E2, chess.E4)]``. An arrow from a square pointing to the same From bcc69e95f24dcb31ee7dc9a4bad7d0ebc9be1530 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 28 Sep 2020 15:04:35 +0200 Subject: [PATCH 007/613] Factor out %cal and %csl handling --- chess/pgn.py | 35 +++++----------------------------- chess/svg.py | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 58 insertions(+), 30 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index 7412659f2..f9e4cd65d 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -441,21 +441,7 @@ def arrows(self) -> List[chess.svg.Arrow]: arrows = [] for match in ARROWS_REGEX.finditer(self.comment): for group in match.group(1).split(","): - color = "green" - if group[0] == "R": - color = "red" - elif group[0] == "Y": - color = "yellow" - elif group[0] == "B": - color = "blue" - - tail = chess.SQUARE_NAMES.index(group[1:3]) - if len(group) == 5: - head = chess.SQUARE_NAMES.index(group[3:5]) - else: - head = tail - - arrows.append(chess.svg.Arrow(tail, head, color=color)) + arrows.append(chess.svg.Arrow.from_pgn(group)) return arrows @@ -469,22 +455,11 @@ def set_arrows(self, arrows: Iterable[Union[chess.svg.Arrow, Tuple[Square, Squar for arrow in arrows: try: - tail, head, color = arrow.tail, arrow.head, arrow.color # type: ignore - if color == "red": - color = "R" - elif color == "yellow": - color = "Y" - elif color == "blue": - color = "B" - else: - color = "G" - except AttributeError: tail, head = arrow # type: ignore - color = "G" - if tail == head: - csl.append(f"{color}{chess.SQUARE_NAMES[tail]}") - else: - cal.append(f"{color}{chess.SQUARE_NAMES[tail]}{chess.SQUARE_NAMES[head]}") + arrow = chess.svg.Arrow(tail, head) + except TypeError: + pass + (csl if arrow.tail == arrow.head else cal).append(arrow.pgn()) self.comment = ARROWS_REGEX.sub("", self.comment).strip() diff --git a/chess/svg.py b/chess/svg.py index 3edce4de1..39182c091 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -92,9 +92,62 @@ def __init__(self, tail: Square, head: Square, *, color: str = "green") -> None: self.head = head self.color = color + def pgn(self) -> str: + """ + Returns the arrow in the format used by ``[%csl ...]`` and + ``[%cal ...]`` PGN annotations, e.g., ``Ga1`` or ``Ya2h2``. + + Colors other than ``red``, ``yellow`` and ``blue`` default to green. + """ + if self.color == "red": + color = "R" + elif self.color == "yellow": + color = "Y" + elif self.color == "blue": + color = "B" + else: + color = "G" + + if self.tail == self.head: + return f"{color}{chess.SQUARE_NAMES[self.tail]}" + else: + return f"{color}{chess.SQUARE_NAMES[self.tail]}{chess.SQUARE_NAMES[self.head]}" + + def __str__(self) -> str: + return self.pgn() + def __repr__(self) -> str: return f"Arrow({chess.SQUARE_NAMES[self.tail].upper()}, {chess.SQUARE_NAMES[self.head].upper()}, color={self.color!r})" + @classmethod + def from_pgn(cls, pgn: str) -> Arrow: + """ + Parses an arrow from the format used by ``[%csl ...]`` and + ``[%cal ...]`` PGN annotations, e.g., ``Ga1`` or ``Ya2h2``. + + Also allows skipping the color prefix, defaulting to green. + + :raises: :exc:`ValueError` if the format is invalid. + """ + if pgn.startswith("G"): + color = "green" + pgn = pgn[1:] + elif pgn.startswith("R"): + color = "red" + pgn = pgn[1:] + elif pgn.startswith("Y"): + color = "yellow" + pgn = pgn[1:] + elif pgn.startswith("B"): + color = "blue" + pgn = pgn[1:] + else: + color = "green" + + tail = chess.parse_square(pgn[:2]) + head = chess.parse_square(pgn[2:]) if len(pgn) > 2 else tail + return cls(tail, head, color=color) + class SvgWrapper(str): def _repr_svg_(self) -> SvgWrapper: From eed112a9ab03f4956764ce8ce2f1d4dbf3bb73aa Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 28 Sep 2020 15:54:51 +0200 Subject: [PATCH 008/613] Fix arrow ducktyping --- chess/pgn.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index f9e4cd65d..de1c5aaa6 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -450,8 +450,8 @@ def set_arrows(self, arrows: Iterable[Union[chess.svg.Arrow, Tuple[Square, Squar Replaces all valid ``[%csl ...]`` and ``[%cal ...]`` annotations in the comment of this node or adds new ones. """ - csl = [] - cal = [] + csl: List[str] = [] + cal: List[str] = [] for arrow in arrows: try: @@ -459,7 +459,7 @@ def set_arrows(self, arrows: Iterable[Union[chess.svg.Arrow, Tuple[Square, Squar arrow = chess.svg.Arrow(tail, head) except TypeError: pass - (csl if arrow.tail == arrow.head else cal).append(arrow.pgn()) + (csl if arrow.tail == arrow.head else cal).append(arrow.pgn()) # type: ignore self.comment = ARROWS_REGEX.sub("", self.comment).strip() From 1bb709822f792e263054123702e34770e4a07a1c Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 29 Sep 2020 12:21:34 +0200 Subject: [PATCH 009/613] Add chess.svg.board(..., orientation) --- chess/svg.py | 29 ++++++++++++++++------------- 1 file changed, 16 insertions(+), 13 deletions(-) diff --git a/chess/svg.py b/chess/svg.py index 39182c091..b82220ae1 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -26,7 +26,7 @@ import chess from typing import Dict, Iterable, Optional, Tuple, Union -from chess import IntoSquareSet, Square +from chess import Color, IntoSquareSet, Square SQUARE_SIZE = 45 @@ -222,22 +222,22 @@ def piece(piece: chess.Piece, size: Optional[int] = None) -> str: def board(board: Optional[chess.BaseBoard] = None, *, - flipped: bool = False, - coordinates: bool = True, + orientation: Color = chess.WHITE, lastmove: Optional[chess.Move] = None, check: Optional[Square] = None, arrows: Iterable[Union[Arrow, Tuple[Square, Square]]] = [], squares: Optional[IntoSquareSet] = None, size: Optional[int] = None, + coordinates: bool = True, colors: Dict[str, str] = {}, + flipped: bool = False, style: Optional[str] = None) -> str: """ Renders a board with pieces and/or selected squares as an SVG image. :param board: A :class:`chess.BaseBoard` for a chessboard with pieces or ``None`` (the default) for a chessboard without pieces. - :param flipped: Pass ``True`` to flip the board. - :param coordinates: Pass ``False`` to disable the coordinate margin. + :param orientation: The point of view, defaulting to ``chess.WHITE``. :param lastmove: A :class:`chess.Move` to be highlighted. :param check: A square to be marked indicating a check. :param arrows: A list of :class:`~chess.svg.Arrow` objects like @@ -247,11 +247,13 @@ def board(board: Optional[chess.BaseBoard] = None, *, :param squares: A :class:`chess.SquareSet` with selected squares. :param size: The size of the image in pixels (e.g., ``400`` for a 400 by 400 board) or ``None`` (the default) for no size limit. + :param coordinates: Pass ``False`` to disable the coordinate margin. :param colors: A dictionary to override default colors. Possible keys are ``square light``, ``square dark``, ``square light lastmove``, ``square dark lastmove``, ``margin``, ``coord``, ``arrow green``, ``arrow blue``, ``arrow red``, and ``arrow yellow``. Values should look like ``#ffce9e`` (opaque) or ``#15781B80`` (transparent). + :param flipped: Pass ``True`` to flip the board. :param style: A CSS stylesheet to include in the SVG image. >>> import chess @@ -264,6 +266,7 @@ def board(board: Optional[chess.BaseBoard] = None, *, .. image:: ../docs/Ne4.svg :alt: 8/8/8/8/4N3/8/8/8 """ + orientation ^= flipped margin = 15 if coordinates else 0 svg = _svg(8 * SQUARE_SIZE + 2 * margin, size) @@ -299,8 +302,8 @@ def board(board: Optional[chess.BaseBoard] = None, *, file_index = chess.square_file(square) rank_index = chess.square_rank(square) - x = (file_index if not flipped else 7 - file_index) * SQUARE_SIZE + margin - y = (7 - rank_index if not flipped else rank_index) * SQUARE_SIZE + margin + x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin + y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + margin cls = ["square", "light" if chess.BB_LIGHT_SQUARES & bb else "dark"] if lastmove and square in [lastmove.from_square, lastmove.to_square]: @@ -350,11 +353,11 @@ def board(board: Optional[chess.BaseBoard] = None, *, if coordinates: coord_color, coord_opacity = _color(colors, "coord") for file_index, file_name in enumerate(chess.FILE_NAMES): - x = (file_index if not flipped else 7 - file_index) * SQUARE_SIZE + margin + x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin svg.append(_coord(file_name, x, 0, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity)) svg.append(_coord(file_name, x, margin + 8 * SQUARE_SIZE, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity)) for rank_index, rank_name in enumerate(chess.RANK_NAMES): - y = (7 - rank_index if not flipped else rank_index) * SQUARE_SIZE + margin + y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + margin svg.append(_coord(rank_name, 0, y, margin, SQUARE_SIZE, False, margin, color=coord_color, opacity=coord_opacity)) svg.append(_coord(rank_name, margin + 8 * SQUARE_SIZE, y, margin, SQUARE_SIZE, False, margin, color=coord_color, opacity=coord_opacity)) @@ -375,10 +378,10 @@ def board(board: Optional[chess.BaseBoard] = None, *, head_file = chess.square_file(head) head_rank = chess.square_rank(head) - xtail = margin + (tail_file + 0.5 if not flipped else 7.5 - tail_file) * SQUARE_SIZE - ytail = margin + (7.5 - tail_rank if not flipped else tail_rank + 0.5) * SQUARE_SIZE - xhead = margin + (head_file + 0.5 if not flipped else 7.5 - head_file) * SQUARE_SIZE - yhead = margin + (7.5 - head_rank if not flipped else head_rank + 0.5) * SQUARE_SIZE + xtail = margin + (tail_file + 0.5 if orientation else 7.5 - tail_file) * SQUARE_SIZE + ytail = margin + (7.5 - tail_rank if orientation else tail_rank + 0.5) * SQUARE_SIZE + xhead = margin + (head_file + 0.5 if orientation else 7.5 - head_file) * SQUARE_SIZE + yhead = margin + (7.5 - head_rank if orientation else head_rank + 0.5) * SQUARE_SIZE if (head_file, head_rank) == (tail_file, tail_rank): ET.SubElement(svg, "circle", _attrs({ From a3b4ff0433c3d1d739fbbcef0cfc66aa5fbca3ab Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 29 Sep 2020 12:53:56 +0200 Subject: [PATCH 010/613] Do not force pawn move for fully specified SAN (closes #266) --- chess/__init__.py | 31 ++++++++++++++++++++----------- data/pgn/uci-moves.pgn | 9 +++++++++ test.py | 6 ++++++ 3 files changed, 35 insertions(+), 11 deletions(-) create mode 100644 data/pgn/uci-moves.pgn diff --git a/chess/__init__.py b/chess/__init__.py index 04e538db5..522ccf687 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -2817,7 +2817,7 @@ def parse_san(self, san: str) -> Move: raise ValueError(f"invalid san: {san!r}") - # Get target square. + # Get target square. Mask our own pieces to exclude castling moves. to_square = SQUARE_NAMES.index(match.group(4)) to_mask = BB_SQUARES[to_square] & ~self.occupied_co[self.turn] @@ -2825,20 +2825,29 @@ def parse_san(self, san: str) -> Move: p = match.group(5) promotion = p and PIECE_SYMBOLS.index(p[-1].lower()) + # Filter by original square. + from_mask = BB_ALL + if match.group(2): + from_file = FILE_NAMES.index(match.group(2)) + from_mask &= BB_FILES[from_file] + if match.group(3): + from_rank = int(match.group(3)) - 1 + from_mask &= BB_RANKS[from_rank] + # Filter by piece type. if match.group(1): piece_type = PIECE_SYMBOLS.index(match.group(1).lower()) - from_mask = self.pieces_mask(piece_type, self.turn) + from_mask &= self.pieces_mask(piece_type, self.turn) + elif match.group(2) and match.group(3): + # Allow fully specified moves, even if they are not pawn moves, + # including castling moves. + move = self.find_move(square(from_file, from_rank), to_square, promotion) + if move.promotion == promotion: + return move + else: + raise ValueError(f"missing promotion piece type: {san!r} in {self.fen()}") else: - from_mask = self.pawns - - # Filter by source file. - if match.group(2): - from_mask &= BB_FILES[FILE_NAMES.index(match.group(2))] - - # Filter by source rank. - if match.group(3): - from_mask &= BB_RANKS[int(match.group(3)) - 1] + from_mask &= self.pawns # Match legal moves. matched_move = None diff --git a/data/pgn/uci-moves.pgn b/data/pgn/uci-moves.pgn new file mode 100644 index 000000000..32c70f235 --- /dev/null +++ b/data/pgn/uci-moves.pgn @@ -0,0 +1,9 @@ +[Event "CCRL 40/4"] +[Site "CCRL"] +[Date "2006.05.24"] +[Round "1"] +[White "Aristarch 4.50"] +[Black "Chess Tiger 15"] +[Result "1/2-1/2"] + +g1f3 c7c5 e2e4 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e6 c1e3 a7a6 g2g4 h7h6 d1f3 b8d7 f1e2 d8c7 f3h3 d6d5 e4d5 f8b4 e3d2 c7b6 d5e6 b6d4 e6d7 c8d7 e1c1 d4b6 d2e3 b4c5 h3g3 c5e3 f2e3 e8g8 g4g5 h6g5 g3g5 f8e8 d1d3 f6h7 c3d5 h7g5 d5b6 d7c6 h1g1 g5h3 g1g3 h3f2 b6a8 f2d3 c2d3 e8a8 g3g5 g7g6 g5c5 g8g7 h2h4 a8h8 h4h5 f7f5 d3d4 g6h5 d4d5 c6e8 c5c7 e8f7 d5d6 g7f6 d6d7 h8d8 c7b7 f6e7 e2a6 f7d5 b7b6 d8d7 a6e2 d7c7 c1d2 d5a2 b6h6 c7d7 d2e1 a2b3 h6h7 e7e6 h7d7 e6d7 e2h5 d7e6 h5d1 b3a2 e1f2 e6e5 f2f3 a2f7 d1c2 f7d5 f3g3 d5c4 c2b1 c4d5 b1d3 d5b3 d3b5 e5e4 g3f2 f5f4 b5c6 e4e5 e3e4 1/2-1/2 diff --git a/test.py b/test.py index e75054c1b..d2e73caac 100755 --- a/test.py +++ b/test.py @@ -2595,6 +2595,12 @@ def test_z0(self): board = game.end().board() self.assertEqual(board.fen(), "5rk1/2p1R2p/p5pb/2PPR3/8/2Q2B2/5P2/4K2q w - - 3 43") + def test_uci_moves(self): + with open("data/pgn/uci-moves.pgn") as pgn: + game = chess.pgn.read_game(pgn) + board = game.end().board() + self.assertEqual(board.fen(), "8/8/2B5/4k3/4Pp2/1b6/1P3K2/8 b - - 0 57") + def test_wierd_header(self): pgn = io.StringIO(r"""[Black "[=0040.34h5a4]"]""") game = chess.pgn.read_game(pgn) From 797d178d3c7703d180c91645220f4a3626fd33f5 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 29 Sep 2020 12:57:41 +0200 Subject: [PATCH 011/613] Allow 0000 and @@@@ as null moves in PGN --- chess/__init__.py | 2 +- chess/pgn.py | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/chess/__init__.py b/chess/__init__.py index 522ccf687..d3ca3e7ea 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -2812,7 +2812,7 @@ def parse_san(self, san: str) -> Move: match = SAN_REGEX.match(san) if not match: # Null moves. - if san in ["--", "Z0"]: + if san in ["--", "Z0", "0000", "@@@@"]: return Move.null() raise ValueError(f"invalid san: {san!r}") diff --git a/chess/pgn.py b/chess/pgn.py index de1c5aaa6..cbdefdea2 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -97,6 +97,8 @@ |[PNBRQK]?@[a-h][1-8] |-- |Z0 + |0000 + |@@@@ |O-O(?:-O)? |0-0(?:-0)? ) From a3594f1f2732a0601dbd482d5bcf432bc43e6a88 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 29 Sep 2020 13:04:50 +0200 Subject: [PATCH 012/613] Simplify parse_xboard --- chess/__init__.py | 32 ++++++-------------------------- 1 file changed, 6 insertions(+), 26 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index d3ca3e7ea..1e70916e8 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -2814,8 +2814,10 @@ def parse_san(self, san: str) -> Move: # Null moves. if san in ["--", "Z0", "0000", "@@@@"]: return Move.null() - - raise ValueError(f"invalid san: {san!r}") + elif "," in san: + raise ValueError(f"unsupported multi-leg move: {san!r}") + else: + raise ValueError(f"invalid san: {san!r}") # Get target square. Mask our own pieces to exclude castling moves. to_square = SQUARE_NAMES.index(match.group(4)) @@ -2940,31 +2942,9 @@ def xboard(self, move: Move, chess960: Optional[bool] = None) -> str: else: return "O-O-O" - def parse_xboard(self, xboard: str) -> Move: - if xboard == "@@@@": - return Move.null() - elif "," in xboard: - raise ValueError(f"unsupported multi-leg xboard move: {xboard!r}") - - try: - move = Move.from_uci(xboard) - move = self._to_chess960(move) - move = self._from_chess960(self.chess960, move.from_square, move.to_square, move.promotion, move.drop) - if not self.is_legal(move): - raise ValueError(f"illegal xboard move: {xboard!r} in {self.fen()}") - return move - except ValueError: - pass + parse_xboard = parse_san - try: - return self.parse_san(xboard) - except ValueError: - raise ValueError(f"invalid or illegal xboard move: {xboard!r} in {self.fen()}") - - def push_xboard(self, xboard: str) -> Move: - move = self.parse_xboard(xboard) - self.push(move) - return move + push_xboard = push_san def is_en_passant(self, move: Move) -> bool: """Checks if the given pseudo-legal move is an en passant capture.""" From 41042967d24981c8d0bd9ce24c571f1a3a62211f Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 29 Sep 2020 13:09:11 +0200 Subject: [PATCH 013/613] Do not strip trailing space from drop notation --- chess/variant.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/variant.py b/chess/variant.py index fab1d2aea..6b774ea75 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -761,7 +761,7 @@ def generate_legal_moves(self, from_mask: chess.Bitboard = chess.BB_ALL, to_mask def parse_san(self, san: str) -> chess.Move: if "@" in san: - uci = san.rstrip("+# ") + uci = san.rstrip("+#") if uci[0] == "@": uci = "P" + uci move = chess.Move.from_uci(uci) From 6d34b24104ac5fd675dda4270c05b624570d5383 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 29 Sep 2020 13:11:11 +0200 Subject: [PATCH 014/613] Fix parse_xboard delegation --- chess/__init__.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/chess/__init__.py b/chess/__init__.py index 1e70916e8..1c5a1d74a 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -2942,7 +2942,8 @@ def xboard(self, move: Move, chess960: Optional[bool] = None) -> str: else: return "O-O-O" - parse_xboard = parse_san + def parse_xboard(self, xboard: str) -> Move: + return self.parse_san(xboard) push_xboard = push_san From 1d49c3ff1f6c5bd17bcb05598611dcd03c2ebfa7 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 29 Sep 2020 13:13:20 +0200 Subject: [PATCH 015/613] Fix promotion typing --- chess/__init__.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/__init__.py b/chess/__init__.py index 1c5a1d74a..8bc0e65cb 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -2825,7 +2825,7 @@ def parse_san(self, san: str) -> Move: # Get the promotion piece type. p = match.group(5) - promotion = p and PIECE_SYMBOLS.index(p[-1].lower()) + promotion = PIECE_SYMBOLS.index(p[-1].lower()) if p else None # Filter by original square. from_mask = BB_ALL From 9f0286aaa546d4ccf39b48ec9a38e8a3077ce1ff Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 29 Sep 2020 13:25:16 +0200 Subject: [PATCH 016/613] Add deprecation notices (#659) --- chess/pgn.py | 5 +++++ chess/svg.py | 3 +++ 2 files changed, 8 insertions(+) diff --git a/chess/pgn.py b/chess/pgn.py index cbdefdea2..0ecf02dbe 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -916,6 +916,11 @@ def parse_san(self, board: chess.Board, san: str) -> chess.Move: You can override the default implementation to work around specific quirks of your input format. + + .. deprecated:: 1.1 + This method is very limited, because it depends too strongly on the + rest of the parser. Instead, please report common quirks so that + workarounds can be added for everyone. """ return board.parse_san(san) diff --git a/chess/svg.py b/chess/svg.py index b82220ae1..dd1f0de63 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -265,6 +265,9 @@ def board(board: Optional[chess.BaseBoard] = None, *, .. image:: ../docs/Ne4.svg :alt: 8/8/8/8/4N3/8/8/8 + + .. deprecated:: 1.1 + Use *orientation* with a color instead of the *flipped* toggle. """ orientation ^= flipped margin = 15 if coordinates else 0 From d5ae00da8d949dfcea3bc3bc8a9d62986bb235f2 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 29 Sep 2020 13:32:50 +0200 Subject: [PATCH 017/613] Limit size of example board --- chess/svg.py | 2 +- docs/Ne4.svg | 186 +-------------------------------------------------- 2 files changed, 2 insertions(+), 186 deletions(-) diff --git a/chess/svg.py b/chess/svg.py index dd1f0de63..59fca6a4a 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -261,7 +261,7 @@ def board(board: Optional[chess.BaseBoard] = None, *, >>> >>> board = chess.Board("8/8/8/8/4N3/8/8/8 w - - 0 1") >>> squares = board.attacks(chess.E4) - >>> chess.svg.board(board=board, squares=squares) # doctest: +SKIP + >>> chess.svg.board(board, squares=squares, size=350) # doctest: +SKIP .. image:: ../docs/Ne4.svg :alt: 8/8/8/8/4N3/8/8/8 diff --git a/docs/Ne4.svg b/docs/Ne4.svg index f18f57b09..65dab1125 100644 --- a/docs/Ne4.svg +++ b/docs/Ne4.svg @@ -1,185 +1 @@ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + \ No newline at end of file From d85b7b807ee67142a813510c7e42bf3a8b4e79fe Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 29 Sep 2020 16:34:33 +0200 Subject: [PATCH 018/613] Prepare 1.1.0 --- CHANGELOG.rst | 15 +++++++++++++++ chess/__init__.py | 2 +- 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 0a451b701..59203f672 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,6 +1,21 @@ Changelog for python-chess ========================== +New in v1.1.0 +------------- + +New features: + +* Added `chess.svg.board(..., orientation)`. This is a more idiomatic way to + set the board orientation than `flipped`. +* Added `chess.svg.Arrow.pgn()` and `chess.svg.Arrow.from_pgn()`. + +Changes: + +* Further relaxed `chess.Board.parse_san()`. Now accepts fully specified moves + like `e2e4`, even if that is not a pawn move, castling notation with zeros, + null moves in UCI notation, and null moves in XBoard notation. + New in v1.0.1 ------------- diff --git a/chess/__init__.py b/chess/__init__.py index 8bc0e65cb..4975d0185 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -26,7 +26,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.0.1" +__version__ = "1.1.0" import collections import copy From b4f77d5662954ddf6ad1f3b817a55bf7f6314d32 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 1 Oct 2020 14:21:20 +0200 Subject: [PATCH 019/613] Clarify BaseVisitor.parse_san() limitations (closes #662) --- chess/pgn.py | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index 0ecf02dbe..a4f0f7eaa 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -918,9 +918,10 @@ def parse_san(self, board: chess.Board, san: str) -> chess.Move: quirks of your input format. .. deprecated:: 1.1 - This method is very limited, because it depends too strongly on the - rest of the parser. Instead, please report common quirks so that - workarounds can be added for everyone. + This method is very limited, because it is only called on moves + that the parser recognizes in the first place. Instead of adding + workarounds here, please report common quirks so that + they can be handled for everyone. """ return board.parse_san(san) From 59d7450145cbda65c9118ac4e7c5f00ba0fe8214 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 3 Oct 2020 09:54:53 +0200 Subject: [PATCH 020/613] Use autodoc_type_aliases --- docs/conf.py | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/docs/conf.py b/docs/conf.py index 40b9092f3..2079ddd9f 100644 --- a/docs/conf.py +++ b/docs/conf.py @@ -2,17 +2,22 @@ import os import typing -# Do not resolve some type aliases. +# Do not resolve these. +autodoc_type_aliases = { + "Square": "chess.Square", + "Color": "chess.Color", + "PieceType": "chess.PieceType", + "Bitboard": "chess.Bitboard", + "IntoSquareSet": "chess.IntoSquareSet", +} + +# Hack to not resolve autodoc_type_aliases before Sphinx 3.3. # See https://github.com/sphinx-doc/sphinx/issues/6518. _get_type_hints = typing.get_type_hints def get_type_hints(obj, globalns=None, localns=None): if localns is None: localns = {} - localns["Square"] = "chess.Square" - localns["Color"] = "chess.Color" - localns["PieceType"] = "chess.PieceType" - localns["Bitboard"] = "chess.Bitboard" - localns["IntoSquareSet"] = "chess.IntoSquareSet" + localns.update(autodoc_type_aliases) return _get_type_hints(obj, globalns, localns) typing.get_type_hints = get_type_hints From ec90b9b7cfc8ed3b4aa08824e86c643beaa723cb Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bo=C5=A1tjan=20Mejak?= Date: Sun, 4 Oct 2020 14:42:13 +0200 Subject: [PATCH 021/613] Stylistic tweaks for docs/conf.py --- docs/conf.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/docs/conf.py b/docs/conf.py index 2079ddd9f..bf1f19db7 100644 --- a/docs/conf.py +++ b/docs/conf.py @@ -22,12 +22,12 @@ def get_type_hints(obj, globalns=None, localns=None): typing.get_type_hints = get_type_hints # Import the chess module. -sys.path.insert(0, os.path.abspath('..')) +sys.path.insert(0, os.path.abspath("..")) import chess # Autodoc. extensions = ["sphinx.ext.autodoc", "sphinx.ext.viewcode"] -autodoc_member_order = 'bysource' +autodoc_member_order = "bysource" # The suffix of source filenames. source_suffix = ".rst" @@ -51,5 +51,5 @@ def get_type_hints(obj, globalns=None, localns=None): pygments_style = "sphinx" # The theme to use for HTML and HTML Help pages. See the documentation for -# a list of builtin themes. +# a list of built-in themes. html_theme = "default" From cf54eb7808a8a70c45bfc7a6ecccbc4b82279ed2 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 19 Oct 2020 10:51:55 +0200 Subject: [PATCH 022/613] Add Score.score(*, mate_score: int) -> int overload --- chess/engine.py | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/chess/engine.py b/chess/engine.py index 47325326a..34932b4cc 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -407,6 +407,10 @@ class Score(abc.ABC): MateGiven """ + @typing.overload + def score(self, *, mate_score: int) -> int: ... + @typing.overload + def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: ... @abc.abstractmethod def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: """ @@ -520,6 +524,10 @@ def __init__(self, moves: int) -> None: def mate(self) -> int: return self.moves + @typing.overload + def score(self, *, mate_score: int) -> int: ... + @typing.overload + def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: ... def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: if mate_score is None: return None @@ -550,6 +558,10 @@ class MateGivenType(Score): def mate(self) -> int: return 0 + @typing.overload + def score(self, *, mate_score: int) -> int: ... + @typing.overload + def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: ... def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: return mate_score From db8ab8c3dc8d33fc47e6ecf2bc93189b2139e648 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 19 Oct 2020 11:43:45 +0200 Subject: [PATCH 023/613] Score has __pos__, __neg__, __abs__ --- chess/engine.py | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/chess/engine.py b/chess/engine.py index 34932b4cc..52a112dff 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -446,6 +446,14 @@ def is_mate(self) -> bool: def __neg__(self) -> Score: pass + @abc.abstractmethod + def __pos__(self) -> Score: + pass + + @abc.abstractmethod + def __abs__(self) -> Score: + pass + def _score_tuple(self) -> Tuple[bool, bool, bool, int, Optional[int]]: mate = self.mate() return ( From 00089bf65dabe37ad57f2fa797fde0b3e4781350 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 19 Oct 2020 12:04:21 +0200 Subject: [PATCH 024/613] Use ... instead of pass for abstract method body --- chess/engine.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 52a112dff..9ad2a89a6 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -444,15 +444,15 @@ def is_mate(self) -> bool: @abc.abstractmethod def __neg__(self) -> Score: - pass + ... @abc.abstractmethod def __pos__(self) -> Score: - pass + ... @abc.abstractmethod def __abs__(self) -> Score: - pass + ... def _score_tuple(self) -> Tuple[bool, bool, bool, int, Optional[int]]: mate = self.mate() From 1cfb9c2ecc9454f126e1d3f3ff04a67cb71a1fb1 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 19 Oct 2020 18:21:23 +0200 Subject: [PATCH 025/613] Add documentation URL to package meta data --- setup.py | 3 +++ 1 file changed, 3 insertions(+) diff --git a/setup.py b/setup.py index 5f418cbf9..d0ceefbe1 100755 --- a/setup.py +++ b/setup.py @@ -108,4 +108,7 @@ def read_description(): "Topic :: Software Development :: Libraries :: Python Modules", "Typing :: Typed", ], + project_urls={ + "Documentation": "https://python-chess.readthedocs.io", + }, ) From 0b4be21ade1e71750322d1e55ed6d2b9d61d187f Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 20 Oct 2020 16:52:04 +0200 Subject: [PATCH 026/613] Remove less specific trove classifier --- setup.py | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/setup.py b/setup.py index d0ceefbe1..b0d5b0cd4 100755 --- a/setup.py +++ b/setup.py @@ -99,10 +99,9 @@ def read_description(): "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)", "Operating System :: OS Independent", "Programming Language :: Python", - "Programming Language :: Python :: 3", + "Programming Language :: Python :: 3 :: Only", "Programming Language :: Python :: 3.7", "Programming Language :: Python :: 3.8", - "Programming Language :: Python :: 3 :: Only", "Topic :: Games/Entertainment :: Board Games", "Topic :: Games/Entertainment :: Turn Based Strategy", "Topic :: Software Development :: Libraries :: Python Modules", From 37ef4a41f70e53d14c98f105535d46c00d64e854 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 20 Oct 2020 21:29:44 +0200 Subject: [PATCH 027/613] Tweak setup.py --- MANIFEST.in | 2 -- setup.py | 7 ++++--- 2 files changed, 4 insertions(+), 5 deletions(-) diff --git a/MANIFEST.in b/MANIFEST.in index 0265f5ea9..18e068342 100644 --- a/MANIFEST.in +++ b/MANIFEST.in @@ -1,3 +1 @@ -include README.rst include CHANGELOG.rst -include LICENSE.txt diff --git a/setup.py b/setup.py index b0d5b0cd4..e3057a29d 100755 --- a/setup.py +++ b/setup.py @@ -83,14 +83,15 @@ def read_description(): long_description=read_description(), long_description_content_type="text/x-rst", license="GPL-3.0+", + license_file="LICENSE.txt", keywords="chess fen epd pgn polyglot syzygy gaviota uci xboard", url="https://github.com/niklasf/python-chess", + packages=["chess"], + test_suite="test", zip_safe=False, # For mypy package_data={ "chess": ["py.typed"], }, - packages=["chess"], - test_suite="test", python_requires=">=3.7", classifiers=[ "Development Status :: 5 - Production/Stable", @@ -98,10 +99,10 @@ def read_description(): "Intended Audience :: Science/Research", "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)", "Operating System :: OS Independent", - "Programming Language :: Python", "Programming Language :: Python :: 3 :: Only", "Programming Language :: Python :: 3.7", "Programming Language :: Python :: 3.8", + "Programming Language :: Python :: 3.9", "Topic :: Games/Entertainment :: Board Games", "Topic :: Games/Entertainment :: Turn Based Strategy", "Topic :: Software Development :: Libraries :: Python Modules", From 83321c7d9aabb479d3469c1d4a08d91f5d0c1936 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 12:14:24 +0200 Subject: [PATCH 028/613] Implement chess.pgn.GameNode.turn() --- chess/pgn.py | 20 +++++++++++++++++++- test.py | 16 ++++++++++++++++ 2 files changed, 35 insertions(+), 1 deletion(-) diff --git a/chess/pgn.py b/chess/pgn.py index a4f0f7eaa..74b164485 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -29,7 +29,7 @@ import chess.svg from typing import Any, Callable, Dict, Generic, Iterable, Iterator, List, Mapping, MutableMapping, Set, TextIO, Tuple, Type, TypeVar, Optional, Union -from chess import Square +from chess import Color, Square LOGGER = logging.getLogger(__name__) @@ -212,6 +212,17 @@ def _move(self) -> chess.Move: assert self.move is not None, "cannot get move of dangling GameNode" return self.move + def _turn(self) -> Color: + assert False, "cannot get turn of dangling GameNode" + + def turn(self) -> Color: + flip = False + node = self + while node.parent is not None: + flip = not flip + node = node.parent + return node._turn() ^ flip + def san(self) -> str: """ Gets the standard algebraic notation of the move leading to this node. @@ -636,6 +647,13 @@ def __init__(self, headers: Optional[Union[Mapping[str, str], Iterable[Tuple[str def _board(self) -> chess.Board: return self.headers.board() + def _turn(self) -> Color: + # Optimization: Parse FEN only for special starting positions. + if "FEN" in self.headers or "Variant" in self.headers: + return self.board().turn + else: + return chess.WHITE + def setup(self, board: Union[chess.Board, str]) -> None: """ Sets up a specific starting position. This sets (or resets) the diff --git a/test.py b/test.py index d2e73caac..b47577d73 100755 --- a/test.py +++ b/test.py @@ -2710,6 +2710,22 @@ def test_annotations(self): game.set_clock(-70) self.assertEqual(game.clock(), 0) # Clamped + def test_node_turn(self): + game = chess.pgn.Game() + self.assertEqual(game.turn(), chess.WHITE) + node = game.add_variation(chess.Move.from_uci("a2a3")) + self.assertEqual(node.turn(), chess.BLACK) + node = node.add_variation(chess.Move.from_uci("a7a6")) + self.assertEqual(node.turn(), chess.WHITE) + + game = chess.pgn.Game() + game.setup("4k3/8/8/8/8/8/8/4K3 b - - 7 6") + self.assertEqual(game.turn(), chess.BLACK) + node = game.add_variation(chess.Move.from_uci("e8e7")) + self.assertEqual(node.turn(), chess.WHITE) + node = node.add_variation(chess.Move.from_uci("e1e2")) + self.assertEqual(node.turn(), chess.BLACK) + @unittest.skipIf(sys.platform == "win32" and (3, 8, 0) <= sys.version_info < (3, 8, 1), "https://bugs.python.org/issue34679") class EngineTestCase(unittest.TestCase): From 37ae9bf40d411729b856cc68e1d30e31a58359b9 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 12:20:18 +0200 Subject: [PATCH 029/613] Mainline is an iterable, not an iterator (fixes #672) --- chess/pgn.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index 74b164485..bd9ea1e66 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -381,11 +381,11 @@ def add_main_variation(self, move: chess.Move, *, comment: str = "") -> GameNode return node def mainline(self) -> Mainline[GameNode]: - """Returns an iterator over the mainline starting after this node.""" + """Returns an iterable over the mainline starting after this node.""" return Mainline(self, lambda node: node) def mainline_moves(self) -> Mainline[chess.Move]: - """Returns an iterator over the main moves after this node.""" + """Returns an iterable over the main moves after this node.""" return Mainline(self, lambda node: node._move()) def add_line(self, moves: Iterable[chess.Move], *, comment: str = "", starting_comment: str = "", nags: Iterable[int] = []) -> GameNode: From 1e18633b1f3fb44dfa8952cce6f983cefa486c69 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 12:41:41 +0200 Subject: [PATCH 030/613] Implement Board.ply() --- chess/__init__.py | 12 ++++++++++++ test.py | 12 ++++++++++++ 2 files changed, 24 insertions(+) diff --git a/chess/__init__.py b/chess/__init__.py index 4975d0185..737f28719 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -1474,6 +1474,18 @@ def root(self: BoardT) -> BoardT: else: return self.copy(stack=False) + def ply(self) -> int: + """ + Returns the number of half-moves since the start of the game, as + indicated by :data:`~chess.Board.fullmove_number` and + :data:`~chess.Board.turn`. + + If moves have been pushed from the beginning, this is usually equal to + ``len(board.move_stack)``. But note that a board can be set up with + arbitrary starting positions, and the stack can be cleared. + """ + return 2 * (self.fullmove_number - 1) + (self.turn == BLACK) + def remove_piece_at(self, square: Square) -> Optional[Piece]: piece = super().remove_piece_at(square) self.clear_stack() diff --git a/test.py b/test.py index b47577d73..90cb67e89 100755 --- a/test.py +++ b/test.py @@ -205,6 +205,18 @@ def test_empty(self): self.assertEqual(board.fen(), "8/8/8/8/8/8/8/8 w - - 0 1") self.assertEqual(board, chess.Board(None)) + def test_ply(self): + board = chess.Board() + self.assertEqual(board.ply(), 0) + board.push_san("d4") + self.assertEqual(board.ply(), 1) + board.push_san("d5") + self.assertEqual(board.ply(), 2) + board.clear_stack() + self.assertEqual(board.ply(), 2) + board.push_san("Nf3") + self.assertEqual(board.ply(), 3) + def test_from_epd(self): base_epd = "rnbqkb1r/ppp1pppp/5n2/3P4/8/8/PPPP1PPP/RNBQKBNR w KQkq -" board, ops = chess.Board.from_epd(base_epd + " ce 55;") From 10bbf3ee328a31480d8011f0fb8112b1758afd20 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 12:49:01 +0200 Subject: [PATCH 031/613] Implement GameNode.turn() in terms of ply() --- chess/pgn.py | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index bd9ea1e66..2f36c73fb 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -212,16 +212,19 @@ def _move(self) -> chess.Move: assert self.move is not None, "cannot get move of dangling GameNode" return self.move - def _turn(self) -> Color: - assert False, "cannot get turn of dangling GameNode" + def _ply(self) -> int: + assert False, "cannot get ply of dangling GameNode" - def turn(self) -> Color: - flip = False + def ply(self) -> int: + ply = 0 node = self while node.parent is not None: - flip = not flip + ply += 1 node = node.parent - return node._turn() ^ flip + return node._ply() + ply + + def turn(self) -> Color: + return self.ply() % 2 == 0 def san(self) -> str: """ @@ -647,12 +650,9 @@ def __init__(self, headers: Optional[Union[Mapping[str, str], Iterable[Tuple[str def _board(self) -> chess.Board: return self.headers.board() - def _turn(self) -> Color: - # Optimization: Parse FEN only for special starting positions. - if "FEN" in self.headers or "Variant" in self.headers: - return self.board().turn - else: - return chess.WHITE + def _ply(self) -> Color: + # Optimization: Parse FEN only for custom starting positions. + return self.board().ply() if "FEN" in self.headers else 0 def setup(self, board: Union[chess.Board, str]) -> None: """ From 86b48893dea27f600d633fcea8340c67d7de7ab3 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 13:11:29 +0200 Subject: [PATCH 032/613] Document GameNode.ply() and GameNode.turn() --- chess/pgn.py | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/chess/pgn.py b/chess/pgn.py index 2f36c73fb..80bdcf22f 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -216,6 +216,14 @@ def _ply(self) -> int: assert False, "cannot get ply of dangling GameNode" def ply(self) -> int: + """ + Returns the number of half-moves up to this node, as indicated by + fullmove number and turn of the position. + See :func:`chess.Board.ply()`. + + Usually this is equal to the number of parent nodes, but it may be + more if the game was started from a custom position. + """ ply = 0 node = self while node.parent is not None: @@ -224,6 +232,9 @@ def ply(self) -> int: return node._ply() + ply def turn(self) -> Color: + """ + Gets the color to move at this node. See :data:`chess.Board.turn`. + """ return self.ply() % 2 == 0 def san(self) -> str: @@ -650,7 +661,7 @@ def __init__(self, headers: Optional[Union[Mapping[str, str], Iterable[Tuple[str def _board(self) -> chess.Board: return self.headers.board() - def _ply(self) -> Color: + def _ply(self) -> int: # Optimization: Parse FEN only for custom starting positions. return self.board().ply() if "FEN" in self.headers else 0 From 8460c63bde39dc2b999225d3d236b78a2c24a808 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 13:26:05 +0200 Subject: [PATCH 033/613] Remove PovScore.__str__() --- chess/engine.py | 3 --- 1 file changed, 3 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 9ad2a89a6..cbb4b7b59 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -370,9 +370,6 @@ def is_mate(self) -> bool: def __repr__(self) -> str: return "PovScore({!r}, {})".format(self.relative, "WHITE" if self.turn else "BLACK") - def __str__(self) -> str: - return str(self.relative) - def __eq__(self, other: object) -> bool: if isinstance(other, PovScore): return self.white() == other.white() From e32f9e15e85f75c8d981d0a272a73cb3926c4856 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 14:19:28 +0200 Subject: [PATCH 034/613] Use GameNode.turn() in GameNode.eval() The returned PovScore is now from the point of view of the player to move. Taking the turn into account allows resolving the ambiguity of [%eval #0]. Previously None was returned in that case. --- chess/pgn.py | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index 80bdcf22f..1696f4ee6 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -432,11 +432,21 @@ def eval(self) -> Optional[chess.engine.PovScore]: match = EVAL_REGEX.search(self.comment) if not match: return None + + turn = self.turn() + if match.group(1): mate = int(match.group(1)) - return chess.engine.PovScore(chess.engine.Mate(mate), chess.WHITE) if mate else None + score: chess.engine.Score = chess.engine.Mate(mate) + if mate == 0: + # Resolve this ambiguity in the specification in favor of + # standard chess: The player to move after mate is the player + # who has been mated. + return chess.engine.PovScore(score, turn) else: - return chess.engine.PovScore(chess.engine.Cp(int(float(match.group(2)) * 100)), chess.WHITE) + score = chess.engine.Cp(int(float(match.group(2)) * 100)) + + return chess.engine.PovScore(score if turn else -score, turn) def set_eval(self, score: Optional[chess.engine.PovScore]) -> None: """ From 9232c9c89bcda4a0c064e5826aa14dedaec4a1b0 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 14:31:53 +0200 Subject: [PATCH 035/613] Try Python 3.9 on readthedocs --- .readthedocs.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/.readthedocs.yml b/.readthedocs.yml index 11760dd7d..e6efe594c 100644 --- a/.readthedocs.yml +++ b/.readthedocs.yml @@ -1,6 +1,6 @@ version: 1 python: - version: 3.8 + version: 3.9 install: - requirements: docs/requirements.txt - method: setuptools From 53e97f3d39e8b7c320d2c1eb313adf0421da331c Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 14:33:19 +0200 Subject: [PATCH 036/613] Tweak engine docs: Python 3.7 is now required anyway --- docs/engine.rst | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/docs/engine.rst b/docs/engine.rst index cea27923c..edb1b88a8 100644 --- a/docs/engine.rst +++ b/docs/engine.rst @@ -13,8 +13,7 @@ both kinds of engines. on your system. The preferred way to use the API is with an -`asyncio `_ event loop -(examples show usage with Python 3.7 or later). +`asyncio `_ event loop. The examples also show a synchronous wrapper :class:`~chess.engine.SimpleEngine` that automatically spawns an event loop in the background. From 83317b34a1752fb31095470b830f144c95592698 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 14:34:37 +0200 Subject: [PATCH 037/613] Revert "Try Python 3.9 on readthedocs" This reverts commit 9232c9c89bcda4a0c064e5826aa14dedaec4a1b0. --- .readthedocs.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/.readthedocs.yml b/.readthedocs.yml index e6efe594c..11760dd7d 100644 --- a/.readthedocs.yml +++ b/.readthedocs.yml @@ -1,6 +1,6 @@ version: 1 python: - version: 3.9 + version: 3.8 install: - requirements: docs/requirements.txt - method: setuptools From facfa00dbc3ca0ee68db24342906725cc507f141 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 14:53:24 +0200 Subject: [PATCH 038/613] Make chess.engine.InfoDict a separate item in the documentation --- chess/engine.py | 14 ++++++++++++-- docs/engine.rst | 12 ++++-------- 2 files changed, 16 insertions(+), 10 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index cbb4b7b59..6ec175438 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -279,7 +279,17 @@ def __repr__(self) -> str: try: class InfoDict(typing.TypedDict, total=False): - """Dictionary of extra information sent by the engine.""" + """ + Dictionary of aggregated information sent by the engine. + + Commonly used keys are: ``score`` (a :class:`~chess.engine.PovScore`), + ``pv`` (a list of :class:`~chess.Move` objects), ``depth``, + ``seldepth``, ``time`` (in seconds), ``nodes``, ``nps``, ``multipv``. + + Others: ``thits``, ``currmove``, ``currmovenumber``, ``hashfull``, + ``cpuload``, ``refutation``, ``currline``, ``ebf``, ``wdl``, and + ``string``. + """ score: PovScore pv: List[chess.Move] depth: int @@ -813,7 +823,7 @@ async def analyse(self, board: chess.Board, limit: Limit, *, multipv: Optional[i async def analyse(self, board: chess.Board, limit: Limit, *, multipv: Optional[int] = None, game: object = None, info: Info = INFO_ALL, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> Union[List[InfoDict], InfoDict]: """ Analyses a position and returns a dictionary of - `information <#chess.engine.PlayResult.info>`_. + :class:`information `. :param board: The position to analyse. The entire move stack will be sent to the engine. diff --git a/docs/engine.rst b/docs/engine.rst index edb1b88a8..ae2ad51d4 100644 --- a/docs/engine.rst +++ b/docs/engine.rst @@ -124,14 +124,8 @@ Example: Let Stockfish play against itself, 100 milliseconds per move. .. py:attribute:: info :type: chess.engine.InfoDict - A dictionary of extra information sent by the engine. Commonly used - keys are: ``score`` (a :class:`~chess.engine.PovScore`), - ``pv`` (a list of :class:`~chess.Move` objects), - ``depth``, ``seldepth``, ``time`` (in seconds), ``nodes``, ``nps``, - ``tbhits``, ``multipv``. - - Others: ``currmove``, ``currmovenumber``, ``hashfull``, ``cpuload``, - ``refutation``, ``currline``, ``ebf``, ``wdl``, and ``string``. + A dictionary of extra :class:`information ` + sent by the engine. .. py:attribute:: draw_offered :type: bool @@ -194,6 +188,8 @@ Example: .. autoclass:: chess.engine.Protocol :members: analyse +.. autoclass:: chess.engine.InfoDict + .. autoclass:: chess.engine.PovScore :members: From 6ae12eb59fefe98228c7fdffe7fe63a1b57691af Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 15:36:43 +0200 Subject: [PATCH 039/613] Tweak typing.Literal bc --- chess/__init__.py | 14 +++++++++++--- chess/pgn.py | 12 ++++++++++-- chess/variant.py | 4 ++-- 3 files changed, 23 insertions(+), 7 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index 737f28719..7c97390ca 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -39,6 +39,14 @@ from typing import ClassVar, Callable, Counter, Dict, Generic, Hashable, Iterable, Iterator, List, Mapping, Optional, SupportsInt, Tuple, Type, TypeVar, Union +try: + from typing import Literal +except ImportError: + # Before Python 3.8. + _EnPassantSpec = str +else: + _EnPassantSpec = Literal["legal", "fen", "xfen"] # type: ignore + Color = bool COLORS = [WHITE, BLACK] = [True, False] @@ -2213,7 +2221,7 @@ def has_legal_en_passant(self) -> bool: """Checks if there is a legal en passant capture.""" return self.ep_square is not None and any(self.generate_legal_ep()) - def fen(self, *, shredder: bool = False, en_passant: str = "legal", promoted: Optional[bool] = None) -> str: + def fen(self, *, shredder: bool = False, en_passant: _EnPassantSpec = "legal", promoted: Optional[bool] = None) -> str: """ Gets a FEN representation of the position. @@ -2245,7 +2253,7 @@ def fen(self, *, shredder: bool = False, en_passant: str = "legal", promoted: Op str(self.fullmove_number) ]) - def shredder_fen(self, *, en_passant: str = "legal", promoted: Optional[bool] = None) -> str: + def shredder_fen(self, *, en_passant: _EnPassantSpec = "legal", promoted: Optional[bool] = None) -> str: return " ".join([ self.epd(shredder=True, en_passant=en_passant, promoted=promoted), str(self.halfmove_clock), @@ -2479,7 +2487,7 @@ def _epd_operations(self, operations: Mapping[str, Union[None, str, int, float, return "".join(epd) - def epd(self, *, shredder: bool = False, en_passant: str = "legal", promoted: Optional[bool] = None, **operations: Union[None, str, int, float, Move, Iterable[Move]]) -> str: + def epd(self, *, shredder: bool = False, en_passant: _EnPassantSpec = "legal", promoted: Optional[bool] = None, **operations: Union[None, str, int, float, Move, Iterable[Move]]) -> str: """ Gets an EPD representation of the current position. diff --git a/chess/pgn.py b/chess/pgn.py index 1696f4ee6..83cf73f82 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -31,6 +31,14 @@ from typing import Any, Callable, Dict, Generic, Iterable, Iterator, List, Mapping, MutableMapping, Set, TextIO, Tuple, Type, TypeVar, Optional, Union from chess import Color, Square +try: + from typing import Literal +except ImportError: + # Before Python 3.8. + _TrueLiteral = bool +else: + _TrueLiteral = Literal[True] # type: ignore + LOGGER = logging.getLogger(__name__) @@ -1166,7 +1174,7 @@ def result(self) -> chess.Board: return self.board -class SkipVisitor(BaseVisitor["typing.Literal[True]"]): +class SkipVisitor(BaseVisitor[_TrueLiteral]): """Skips a game.""" def begin_game(self) -> SkipType: @@ -1178,7 +1186,7 @@ def end_headers(self) -> SkipType: def begin_variation(self) -> SkipType: return SKIP - def result(self) -> "typing.Literal[True]": + def result(self) -> _TrueLiteral: return True diff --git a/chess/variant.py b/chess/variant.py index 6b774ea75..a801ed5ad 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -567,7 +567,7 @@ def set_fen(self, fen: str) -> None: self.remaining_checks[chess.WHITE] = wc self.remaining_checks[chess.BLACK] = bc - def epd(self, shredder: bool = False, en_passant: str = "legal", promoted: Optional[bool] = None, **operations: Union[None, str, int, float, chess.Move, Iterable[chess.Move]]) -> str: + def epd(self, shredder: bool = False, en_passant: chess._EnPassantSpec = "legal", promoted: Optional[bool] = None, **operations: Union[None, str, int, float, chess.Move, Iterable[chess.Move]]) -> str: epd = [super().epd(shredder=shredder, en_passant=en_passant, promoted=promoted), "{:d}+{:d}".format(max(self.remaining_checks[chess.WHITE], 0), max(self.remaining_checks[chess.BLACK], 0))] @@ -814,7 +814,7 @@ def board_fen(self, promoted: Optional[bool] = None) -> str: promoted = True return super().board_fen(promoted=promoted) - def epd(self, shredder: bool = False, en_passant: str = "legal", promoted: Optional[bool] = None, **operations: Union[None, str, int, float, chess.Move, Iterable[chess.Move]]) -> str: + def epd(self, shredder: bool = False, en_passant: chess._EnPassantSpec = "legal", promoted: Optional[bool] = None, **operations: Union[None, str, int, float, chess.Move, Iterable[chess.Move]]) -> str: epd = super().epd(shredder=shredder, en_passant=en_passant, promoted=promoted) board_part, info_part = epd.split(" ", 1) return f"{board_part}[{str(self.pockets[chess.WHITE]).upper()}{self.pockets[chess.BLACK]}] {info_part}" From 277ec32970408028eef397d33336c57bf63fa817 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 15:38:47 +0200 Subject: [PATCH 040/613] Try to run mypy on all Python versions --- .travis.yml | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/.travis.yml b/.travis.yml index a13992af3..8454ba6dc 100644 --- a/.travis.yml +++ b/.travis.yml @@ -47,7 +47,7 @@ install: - pip install --upgrade pip wheel - pip install --upgrade setuptools - pip install --upgrade coveralls - - if [[ $LATEST -eq 1 ]]; then pip install --upgrade mypy; fi + - pip install --upgrade mypy - pip install -e . script: - # Unit tests @@ -77,8 +77,8 @@ script: - echo Unit tests complete - coveralls || [[ $? -eq 139 ]] - # Typing - - if [[ $LATEST -eq 1 ]]; then python -m mypy --strict chess; fi - - if [[ $LATEST -eq 1 ]]; then python -m mypy --strict examples/**/*.py; fi + - python -m mypy --strict chess + - python -m mypy --strict examples/**/*.py - # Perft tests - if [[ $LATEST -eq 1 ]]; then python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000; fi - if [[ $LATEST -eq 1 ]]; then python examples/perft/perft.py -t 1 examples/perft/tricky.perft; fi From 157ee7ea540daf9457a3f1fa1bcddeec00036e88 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 15:55:05 +0200 Subject: [PATCH 041/613] Bump Sphinx --- docs/requirements.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/requirements.txt b/docs/requirements.txt index 5f571802a..89eb0be0b 100644 --- a/docs/requirements.txt +++ b/docs/requirements.txt @@ -1 +1 @@ -sphinx==3.2.0 +sphinx==3.2.1 From 7fabab85bc78f7388f350d61dd13f35f2f7613ca Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 16:03:05 +0200 Subject: [PATCH 042/613] Try to fix Travis matrix --- .travis.yml | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/.travis.yml b/.travis.yml index 8454ba6dc..1b65ad49a 100644 --- a/.travis.yml +++ b/.travis.yml @@ -1,10 +1,9 @@ dist: xenial language: python sudo: false -python: - - "3.7" matrix: include: + - python: "3.7" - python: "3.8" env: LATEST=1 cache: From 61cccb8f9512387085af20954cf04156340a31dd Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 16:09:37 +0200 Subject: [PATCH 043/613] Remove trailing space --- chess/__init__.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/__init__.py b/chess/__init__.py index 7c97390ca..63fd03464 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -3494,7 +3494,7 @@ def mirror(self: BoardT) -> BoardT: Returns a mirrored copy of the board. The board is mirrored vertically and piece colors are swapped, so that - the position is equivalent modulo color. Also swap the "en passant" + the position is equivalent modulo color. Also swap the "en passant" square, castling rights and turn. Alternatively, :func:`~chess.Board.apply_mirror()` can be used From 31fa7e492eaf7e1727798e1f281e1ab28ff08b75 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 16:44:41 +0200 Subject: [PATCH 044/613] Revert "Try to run mypy on all Python versions" This reverts commit 277ec32970408028eef397d33336c57bf63fa817. --- .travis.yml | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/.travis.yml b/.travis.yml index 1b65ad49a..9f27efb19 100644 --- a/.travis.yml +++ b/.travis.yml @@ -46,7 +46,7 @@ install: - pip install --upgrade pip wheel - pip install --upgrade setuptools - pip install --upgrade coveralls - - pip install --upgrade mypy + - if [[ $LATEST -eq 1 ]]; then pip install --upgrade mypy; fi - pip install -e . script: - # Unit tests @@ -76,8 +76,8 @@ script: - echo Unit tests complete - coveralls || [[ $? -eq 139 ]] - # Typing - - python -m mypy --strict chess - - python -m mypy --strict examples/**/*.py + - if [[ $LATEST -eq 1 ]]; then python -m mypy --strict chess; fi + - if [[ $LATEST -eq 1 ]]; then python -m mypy --strict examples/**/*.py; fi - # Perft tests - if [[ $LATEST -eq 1 ]]; then python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000; fi - if [[ $LATEST -eq 1 ]]; then python examples/perft/perft.py -t 1 examples/perft/tricky.perft; fi From b1b1fb803caecd685ceb5756f165e4ccab9e8514 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 17:02:15 +0200 Subject: [PATCH 045/613] Try Python 3.9 on Travis CI (#671) --- .travis.yml | 1 + 1 file changed, 1 insertion(+) diff --git a/.travis.yml b/.travis.yml index 9f27efb19..d63d22051 100644 --- a/.travis.yml +++ b/.travis.yml @@ -5,6 +5,7 @@ matrix: include: - python: "3.7" - python: "3.8" + - python: "3.9" env: LATEST=1 cache: directories: From 45039e7d05f8b0267f2a3e96712bb7e8f4bd9f0a Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 17:03:39 +0200 Subject: [PATCH 046/613] PyPy is not tested in CI --- README.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.rst b/README.rst index 17099d100..a457c97ce 100644 --- a/README.rst +++ b/README.rst @@ -79,7 +79,7 @@ python-chess: Features -------- -* Supports Python 3.7+ and PyPy3. Includes mypy typings. +* Supports Python 3.7+. Includes mypy typings. * IPython/Jupyter Notebook integration. `SVG rendering docs `_. From f73e290a5895326c9e4d788ada11c16be8e94c8e Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 17:17:46 +0200 Subject: [PATCH 047/613] Split changelog --- CHANGELOG-OLD.rst | 1887 +++++++++++++++++++++++++++++++++++++++++++++ CHANGELOG.rst | 1882 +------------------------------------------- 2 files changed, 1888 insertions(+), 1881 deletions(-) create mode 100644 CHANGELOG-OLD.rst diff --git a/CHANGELOG-OLD.rst b/CHANGELOG-OLD.rst new file mode 100644 index 000000000..6a9f5facf --- /dev/null +++ b/CHANGELOG-OLD.rst @@ -0,0 +1,1887 @@ +Old Changelog for python-chess up to 1.0.0 +========================================== + +New in v1.0.0 +------------- + +Changes: + +* Now requires Python 3.7+. +* `chess.engine` will now cut off illegal principal variations at the first + illegal move instead of discarding them entirely. +* `chess.engine.EngineProtocol` renamed to `chess.engine.Protocol`. +* `chess.engine.Option` is no longer a named tuple. +* Renamed `chess.gaviota` internals. +* Relaxed type annotations of `chess.pgn.GameNode.variation()` and related + methods. +* Changed default colors of `chess.svg.Arrow` and + `chess.pgn.GameNode.arrows()`. These can be overriden with the new + `chess.svg.board(..., colors)` feature. +* Documentation improvements. Will now show type aliases like `chess.Square` + instead of `int`. + +Bugfixes: + +* Fix insufficient material with same-color bishops on both sides. +* Clarify that `chess.Board.can_claim_draw()` and related methods refer to + claims by the player to move. Three-fold repetition could already be claimed + before making the final repeating move. `chess.Board.can_claim_fifty_moves()` + now also allows a claim before the final repeating move. The previous + behavior is `chess.Board.is_fifty_moves()`. +* Fix parsing of green arrows/circles in `chess.pgn.GameNode.arrows()`. +* Fix overloaded type signature of `chess.engine.Protocol.engine()`. + +New features: + +* Added `chess.parse_square()`, to be used instead of + `chess.SQUARE_NAMES.index()`. +* Added `chess.Board.apply_mirror()`. +* Added `chess.svg.board(..., colors)`, to allow overriding the default theme. + +New in v0.31.4 +-------------- + +Bugfixes: + +* Fix inconsistency where `board.is_legal()` was not accepting castling moves + in Chess960 notation (when board is in standard mode), while all other + methods did. +* Fix `chess.pgn.GameNode.set_clock()` with negative or floating point values. +* Avoid leading and trailing spaces in PGN comments when setting annotations. + +New features: + +* Finish typing and declare support for mypy. + +New in v0.31.3 +-------------- + +Bugfixes: + +* Custom castling rights assigned to `board.castling_rights` or castling rights + left over after `Board.set_board_fen()` were not correctly cleaned after + the first move. + +Changes: + +* Ignore up to one consecutive empty line between PGN headers. +* Added PGN Variant `From Position` as an alias for standard chess. +* `chess.pgn.FileExporter.result()` now returns the number of written + characters. +* `chess.engine` now avoids sending 0 for search limits, which some engines + misunderstand as no limit. +* `chess.engine` better handles null moves sent to the engine. +* `chess.engine` now gracefully handles `NULL` ponder moves and uppercase + moves received from UCI engines, which is technically invalid. + +New features: + +* Added `chess.pgn.GameNode.{clock, set_clock}()` to read and write + `[%clk ...]` **PGN annotations**. +* Added `chess.pgn.GameNode.{arrows, set_arrows}()` to read and write + `[%csl ...]` and `[%cal ...]` PGN annotations. +* Added `chess.pgn.GameNode.{eval, set_eval}()` to read and write + `[%eval ...]` PGN annotations. +* Added `SquareSet.ray(a, b)` and `SquareSet.between(a, b)`. + +New in v0.31.2 +-------------- + +Bugfixes: + +* Fix rejected/accepted in `chess.engine.XBoardProtocol`. +* Misc typing fixes. + +Changes: + +* Deprecated `chess.syzygy.is_table_name()`. Replaced with + `chess.syzygy.is_tablename()` which has additional parameters and defaults to + `one_king`. +* Take advantage of `int.bit_count()` coming in Python 3.10. + +New in v0.31.1 +-------------- + +Bugfixes: + +* `RacingKingsBoard.is_variant_win()` no longer incorrectly returns `True` + for drawn positions. +* Multiple moves for EPD opcodes *am* and *bm* are now sorted as required by + the specification. +* Coordinates of SVG boards are now properly aligned, even when rendered as + SVG Tiny. + +Changes: + +* SVG boards now have a background color for the coordinate margin, making + coordinates readable on dark backgrounds. +* Added *[Variant "Illegal"]* as an alias for standard chess + (used by Chessbase). + +Features: + +* Added `Board.find_move()`, useful for finding moves that match human input. + +New in v0.31.0 +-------------- + +Changes: + +* Replaced lookup table `chess.BB_BETWEEN[a][b]` with a function + `chess.between(a, b)`. Improves initialization and runtime performance. +* `chess.pgn.BaseVisitor.result()` is now an abstract method, forcing + subclasses to implement it. +* Removed helper attributes from `chess.engine.InfoDict`. Instead it is now + a `TypedDict`. +* `chess.engine.PovScore` equality is now semantic instead of structural: + Scores compare equal to the negative score from the opposite point of view. + +Bugfixes: + +* `chess.Board.is_irreversible()` now considers ceding legal en passant + captures as irreversible. Also documented that false-negatives due to forced + lines are by design. +* Fixed stack overflow in `chess.pgn` when exporting, visiting or getting the + final board of a very long game. +* Clarified documentation regarding board validity. +* `chess.pgn.GameNode.__repr__()` no longer errors if the root node has invalid + FEN or Variant headers. +* Carriage returns are no longer allowed in PGN header values, fixing + reparsability. +* Fixed type error when XBoard name or egt features have a value that looks + like an integer. +* `chess.engine` is now passing type checks with mypy. +* `chess.gaviota` is now passing type checks with mypy. + +Features: + +* Added `chess.Board.gives_check()`. +* `chess.engine.AnalysisResult.wait()` now returns `chess.engine.BestMove`. +* Added `empty_square` parameter for `chess.Board.unicode()` with better + aligned default (⭘). + +New in v0.30.1 +-------------- + +Changes: + +* Positions with more than two checkers are considered invalid and + `board.status()` returns `chess.STATUS_TOO_MANY_CHECKERS`. +* Pawns drops in Crazyhouse are considered zeroing and reset + `board.halfmove_clock` when played. +* Now validating file sizes when opening Syzygy tables and Polyglot opening + books. +* Explicitly warn about untrusted tablebase files and chess engines. + +Bugfixes: + +* Fix Racing Kings game end detection: Black cannot catch up if their own + pieces block the goal. White would win on the next turn, so this did not + impact the game theoretical outcome of the game. +* Fix bugs discovered by fuzzing the EPD parser: Fixed serialization of + empty strings, reparsability of empty move lists, handling of non-finite + floats, and handling of whitespace in opcodes. + +Features: + +* Added `board.checkers()`, returning a set of squares with the pieces giving + check. + +New in v0.30.0 +-------------- + +Changes: + +* **Dropped support for Python 3.5.** +* Remove explicit loop arguments in `chess.engine` module, following + https://bugs.python.org/issue36373. + +Bugfixes: + +* `chess.engine.EngineProtocol.returncode` is no longer poisoned when + `EngineProtocol.quit()` times out. +* `chess.engine.PlayResult.info` was not always of type + `chess.engine.InfoDict`. + +Features: + +* The background thread spawned by `chess.engine.SimpleEngine` is now named + for improved debuggability, revealing the PID of the engine process. +* `chess.engine.EventLoopPolicy` now supports `asyncio.PidfdChildWatcher` + when running on Python 3.9+ and Linux 5.3+. +* Add `chess.Board.san_and_push()`. + +New in v0.29.0 +-------------- + +Changes: + +* `chess.variant.GiveawayBoard` **now starts with castling rights**. + `chess.variant.AntichessBoard` is the same variant without castling rights. +* UCI info parser no longer reports errors when encountering unknown tokens. +* Performance improvements for repetition detection. +* Since Python 3.8: `chess.syzygy`/`chess.polyglot` use `madvise(MADV_RANDOM)` + to prepare table/book files for random access. + +Bugfixes: + +* Fix syntax error in type annotation of `chess.engine.run_in_background()`. +* Fix castling rights when king is exploded in Atomic. Mitigated by the fact + that the game is over and that it did not affect FEN. +* Fix insufficient material with underpromoted pieces in Crazyhouse. Mitigated + by the fact that affected positions are unreachable in Crazyhouse. + +Features: + +* Support `wdl` in UCI info (usually activated with `UCI_ShowWDL`). + +New in v0.28.3 +-------------- + +Bugfixes: + +* Follow FICS rules in Atomic castling edge cases. +* Handle self-reported errors by XBoard engines "Error: ..." or + "Illegal move: ...". + +New in v0.28.2 +-------------- + +Bugfixes: + +* Fixed exception propagation, when a UCI engine sends an invalid `bestmove`. + Thanks @fsmosca. + +Changes: + +* `chess.Move.from_uci()` no longer accepts moves from and to the same square, + for example `a1a1`. `0000` is now the only valid null move notation. + +New in v0.28.1 +-------------- + +Bugfixes: + +* The minimum Python version is 3.5.3 (instead of 3.5.0). +* Fix `board.is_irreversible()` when capturing a rook that had castling rights. + +Changes: + +* `is_en_passant()`, `is_capture()`, `is_zeroing()`, `is_irreversible()`, + `is_castling()`, `is_kingside_castling()` and `is_queenside_castling()` + now consistently return `False` for null moves. +* Added `chess.engine.InfoDict` class with typed shorthands for common keys. +* Support `[Variant "3-check"]` (from chess.com PGNs). + +New in v0.28.0 +-------------- + +Changes: + +* Dropped support for Python 3.4 (end of life reached). +* `chess.polyglot.Entry.move` **is now a property instead of a method**. + The raw move is now always decoded in the context of the position (relevant + for castling moves). +* `Piece`, `Move`, `BaseBoard` and `Board` comparisons no longer support + duck typing. +* FENs sent to engines now always include potential en passant squares, even if + no legal en passant capture exists. +* Circular SVG arrows now have a `circle` CSS class. +* Superfluous dashes (-) in EPDs are no longer treated as opcodes. +* Removed `GameCreator`, `HeaderCreator` and `BoardCreator` aliases for + `{Game,Headers,Board}Builder`. + +Bugfixes: + +* Notation like `Kh1` is no longer accepted for castling moves. +* Remove stale files from wheels published on PyPI. +* Parsing Three-Check EPDs with moves was always failing. +* Some methods in `chess.variant` were returning bool-ish integers, when they + should have returned `bool`. +* `chess.engine`: Fix line decoding when Windows line-endings arrive seperately + in stdout buffer. +* `chess.engine`: Survive timeout in analysis. +* `chess.engine`: Survive unexpected `bestmove` sent by misbehaving UCI engines. + +New features: + +* **Experimental type signatures for almost all public APIs** (`typing`). + Some modules do not yet internally pass typechecking. +* Added `Board.color_at(square)`. +* Added `chess.engine.AnalysisResult.get()` and `empty()`. +* `chess.engine`: The `UCI_AnalyseMode` option is still automatically managed, + but can now be overwritten. +* `chess.engine.EngineProtocol` and constructors now optionally take + an explicit `loop` argument. + +New in v0.27.3 +-------------- + +Changes: + +* `XBoardProtocol` will no longer raise an exception when the engine resigned. + Instead it sets a new flag `PlayResult.resigned`. `resigned` and + `draw_offered` are keyword-only arguments. +* Renamed `chess.pgn.{Game,Header,Board}Creator` to + `{Game,Headers,Board}Builder`. Aliases kept in place. + +Bugfixes: + +* Make `XBoardProtocol` robust against engines that send a move after claiming + a draw or resigning. Thanks @pascalgeo. +* `XBoardProtocol` no longer ignores `Hint:` sent by the engine. +* Fix handling of illegal moves in `XBoardProtocol`. +* Fix exception when engine is shut down while pondering. +* Fix unhandled internal exception and file descriptor leak when engine + initialization fails. +* Fix `HordeBoard.status()` when black pieces are on the first rank. + Thanks @Wisling. + +New features: + +* Added `chess.pgn.Game.builder()`, `chess.pgn.Headers.builder()` and + `chess.pgn.GameNode.dangling_node()` to simplify subclassing `GameNode`. +* `EngineProtocol.communicate()` is now also available in the synchronous API. + +New in v0.27.2 +-------------- + +Bugfixes: + +* `chess.engine.XBoardProtocol.play()` was searching 100 times longer than + intended when using `chess.engine.Limit.time`, and searching 100 times more + nodes than intended when using `chess.engine.Limit.nodes`. Thanks @pascalgeo. + +New in v0.27.1 +-------------- + +Bugfixes: + +* `chess.engine.XBoardProtocol.play()` was raising `KeyError` when using time + controls with increment or remaining moves. Thanks @pascalgeo. + +New in v0.27.0 +-------------- + +This is the second **release candidate for python-chess 1.0**. If you see the +need for breaking changes, please speak up now! + +Bugfixes: + +* `EngineProtocol.analyse(*, multipv)` was not passing this argument to the + engine and therefore only returned the first principal variation. + Thanks @svangordon. +* `chess.svg.board(*, squares)`: The X symbol on selected squares is now more + visible when it overlaps pieces. + +Changes: + +* **FEN/EPD parsing is now more relaxed**: Incomplete FENs and EPDs are + completed with reasonable defaults (`w - - 0 1`). The EPD parser accepts + fields with moves in UCI notation (for example the technically invalid + `bm g1f3` instead of `bm Nf3`). +* The PGN parser now skips games with invalid FEN headers and variations after + an illegal move (after handling the error as usual). + +New features: + +* Added `Board.is_repetition(count=3)`. +* Document that `chess.engine.EngineProtocol` is compatible with + AsyncSSH 1.16.0. + +New in v0.26.0 +-------------- + +This is the first **release candidate for python-chess 1.0**. If you see the +need for breaking changes, please speak up now! + +Changes: + +* `chess.engine` **is now stable and replaces** + `chess.uci` **and** `chess.xboard`. +* Advanced: `EngineProtocol.initialize()` is now public for use with custom + transports. +* Removed `__ne__` implementations (not required since Python 3). +* Assorted documentation and coding-style improvements. + +New features: + +* Check insufficient material for a specific side: + `board.has_insufficient_material(color)`. +* Copy boards with limited stack depth: `board.copy(stack=depth)`. + +Bugfixes: + +* Properly handle delayed engine errors, for example unsupported options. + +New in v0.25.1 +-------------- + +Bugfixes: + +* `chess.engine` did not correctly handle Windows-style line endings. + Thanks @Bstylestuff. + +New in v0.25.0 +-------------- + +New features: + +* This release introduces a new **experimental API for chess engine + communication**, `chess.engine`, based on `asyncio`. It is intended to + eventually replace `chess.uci` and `chess.xboard`. + +Bugfixes: + +* Fixed race condition in LRU-cache of open Syzygy tables. The LRU-cache is + enabled by default (*max_fds*). +* Fix deprecation warning and unclosed file in setup.py. + Thanks Mickaël Schoentgen. + +Changes: + +* `chess.pgn.read_game()` now ignores BOM at the start of the stream. +* Removed deprecated items. + +New in v0.24.2 +-------------- + +Bugfixes: + +* `CrazyhouseBoard.root()` and `ThreeCheckBoard.root()` were not returning the + correct pockets and number of remaining checks, respectively. Thanks @gbtami. +* `chess.pgn.skip_game()` now correctly skips PGN comments that contain + line-breaks and PGN header tag notation. + +Changes: + +* Renamed `chess.pgn.GameModelCreator` to `GameCreator`. Alias kept in place + and will be removed in a future release. +* Renamed `chess.engine` to `chess._engine`. Use re-exports from `chess.uci` + or `chess.xboard`. +* Renamed `Board.stack` to `Board._stack`. Do not use this directly. +* Improved memory usage: `Board.legal_moves` and `Board.pseudo_legal_moves` + no longer create reference cycles. PGN visitors can manage headers + themselves. +* Removed previously deprecated items. + +Features: + +* Added `chess.pgn.BaseVisitor.visit_board()` and `chess.pgn.BoardCreator`. + +New in v0.24.1, v0.23.11 +------------------------ + +Bugfixes: + +* Fix `chess.Board.set_epd()` and `chess.Board.from_epd()` with semicolon + in string operand. Thanks @jdart1. +* `chess.pgn.GameNode.uci()` was always raising an exception. + Also included in v0.24.0. + +New in v0.24.0 +-------------- + +This release **drops support for Python 2**. The *0.23.x* branch will be +maintained for one more month. + +Changes: + +* **Require Python 3.4.** Thanks @hugovk. +* No longer using extra pip features: + `pip install python-chess[engine,gaviota]` is now `pip install python-chess`. +* Various keyword arguments can now be used as **keyword arguments only**. +* `chess.pgn.GameNode.accept()` now + **also visits the move leading to that node**. +* `chess.pgn.GameModelCreator` now requires that `begin_game()` be called. +* `chess.pgn.scan_headers()` and `chess.pgn.scan_offsets()` have been removed. + Instead the new functions `chess.pgn.read_headers()` and + `chess.pgn.skip_game()` can be used for a similar purpose. +* `chess.syzygy`: Invalid magic headers now raise `IOError`. Previously they + were only checked in an assertion. + `type(board).{tbw_magic,tbz_magic,pawnless_tbw_magic,pawnless_tbz_magic}` + are now byte literals. +* `board.status()` constants (`STATUS_`) are now typed using `enum.IntFlag`. + Values remain unchanged. +* `chess.svg.Arrow` is no longer a `namedtuple`. +* `chess.PIECE_SYMBOLS[0]` and `chess.PIECE_NAMES[0]` are now `None` instead + of empty strings. +* Performance optimizations: + + * `chess.pgn.Game.from_board()`, + * `chess.square_name()` + * Replace `collections.deque` with lists almost everywhere. + +* Renamed symbols (aliases will be removed in the next release): + + * `chess.BB_VOID` -> `BB_EMPTY` + * `chess.bswap()` -> `flip_vertical()` + * `chess.pgn.GameNode.main_line()` -> `mainline_moves()` + * `chess.pgn.GameNode.is_main_line()` -> `is_mainline()` + * `chess.variant.BB_HILL` -> `chess.BB_CENTER` + * `chess.syzygy.open_tablebases()` -> `open_tablebase()` + * `chess.syzygy.Tablebases` -> `Tablebase` + * `chess.syzygy.Tablebase.open_directory()` -> `add_directory()` + * `chess.gaviota.open_tablebases()` -> `open_tablebase()` + * `chess.gaviota.open_tablebases_native()` -> `open_tablebase_native()` + * `chess.gaviota.NativeTablebases` -> `NativeTablebase` + * `chess.gaviota.PythonTablebases` -> `PythonTablebase` + * `chess.gaviota.NativeTablebase.open_directory()` -> `add_directory()` + * `chess.gaviota.PythonTablebase.open_directory()` -> `add_directory()` + +Bugfixes: + +* The PGN parser now gives the visitor a chance to handle unknown chess + variants and continue parsing. +* `chess.pgn.GameNode.uci()` was always raising an exception. + +New features: + +* `chess.SquareSet` now extends `collections.abc.MutableSet` and can be + initialized from iterables. +* `board.apply_transform(f)` and `board.transform(f)` can apply bitboard + transformations to a position. Examples: + `chess.flip_{vertical,horizontal,diagonal,anti_diagonal}`. +* `chess.pgn.GameNode.mainline()` iterates over nodes of the mainline. + Can also be used with `reversed()`. Reversal is now also supported for + `chess.pgn.GameNode.mainline_moves()`. +* `chess.svg.Arrow(tail, head, color="#888")` gained an optional *color* + argument. +* `chess.pgn.BaseVisitor.parse_san(board, san)` is used by parsers and can + be overwritten to deal with non-standard input formats. +* `chess.pgn`: Visitors can advise the parser to skip games or variations by + returning the special value `chess.pgn.SKIP` from `begin_game()`, + `end_headers()` or `begin_variation()`. This is only a hint. + The corresponding `end_game()` or `end_variation()` will still be called. +* Added `chess.svg.MARGIN`. + +New in v0.23.10 +--------------- + +Bugfixes: + +* `chess.SquareSet` now correctly handles negative masks. Thanks @hasnul. +* `chess.pgn` now accepts `[Variant "chess 960"]` (with the space). + +New in v0.23.9 +-------------- + +Changes: + +* Updated `Board.is_fivefold_repetition()`. FIDE rules have changed and the + repetition no longer needs to occur on consecutive alternating moves. + Thanks @LegionMammal978. + +New in v0.23.8 +-------------- + +Bugfixes: + +* `chess.syzygy`: Correctly initialize wide DTZ map for experimental 7 piece + table KRBBPvKQ. + +New in v0.23.7 +-------------- + +Bugfixes: + +* Fixed `ThreeCheckBoard.mirror()` and `CrazyhouseBoard.mirror()`, which + were previously resetting remaining checks and pockets respectively. + Thanks @QueensGambit. + +Changes: + +* `Board.move_stack` is now guaranteed to be UCI compatible with respect to + the representation of castling moves and `board.chess960`. +* Drop support for Python 3.3, which is long past end of life. +* `chess.uci`: The `position` command now manages `UCI_Chess960` and + `UCI_Variant` automatically. +* `chess.uci`: The `position` command will now always send the entire history + of moves from the root position. +* Various coding style fixes and improvements. Thanks @hugovk. + +New features: + +* Added `Board.root()`. + +New in v0.23.6 +-------------- + +Bugfixes: + +* Gaviota: Fix Python based Gaviota tablebase probing when there are multiple + en passant captures. Thanks @bjoernholzhauer. +* Syzygy: Fix DTZ for some mate in 1 positions. Similarly to the fix from + v0.23.1 this is mostly cosmetic. +* Syzygy: Fix DTZ off-by-one in some 6 piece antichess positions with moves + that threaten to force a capture. This is mostly cosmetic. + +Changes: + +* Let `uci.Engine.position()` send history of at least 8 moves if available. + Previously it sent only moves that were relevant for repetition detection. + This is mostly useful for Lc0. Once performance issues are solved, a future + version will always send the entire history. Thanks @SashaMN and @Mk-Chan. +* Various documentation fixes and improvements. + +New features: + +* Added `polyglot.MemoryMappedReader.get(board, default=None)`. + +New in v0.23.5 +-------------- + +Bugfixes: + +* Atomic chess: KNvKN is not insufficient material. +* Crazyhouse: Detect insufficient material. This can not happen unless the + game was started with insufficient material. + +Changes: + +* Better error messages when parsing info from UCI engine fails. +* Better error message for `b.set_board_fen(b.fen())`. + +New in v0.23.4 +-------------- + +New features: + +* XBoard: Support pondering. Thanks Manik Charan. +* UCI: Support unofficial `info ebf`. + +Bugfixes: + +* Implement 16 bit DTZ mapping, which is required for some of the longest + 7 piece endgames. + +New in v0.23.3 +-------------- + +New features: + +* XBoard: Support `variant`. Thanks gbtami. + +New in v0.23.2 +-------------- + +Bugfixes: + +* XBoard: Handle multiple features and features with spaces. Thanks gbtami. +* XBoard: Ignore debug output prefixed with `#`. Thanks Dan Ravensloft and + Manik Charan. + +New in v0.23.1 +-------------- + +Bugfixes: + +* Fix DTZ in case of mate in 1. This is a cosmetic fix, as the previous + behavior was only off by one (which is allowed by design). + +New in v0.23.0 +-------------- + +New features: + +* Experimental support for 7 piece Syzygy tablebases. + +Changes: + +* `chess.syzygy.filenames()` was renamed to `tablenames()` and + gained an optional `piece_count=6` argument. +* `chess.syzygy.normalize_filename()` was renamed to `normalize_tablename()`. +* The undocumented constructors of `chess.syzygy.WdlTable` and + `chess.syzygy.DtzTable` have been changed. + +New in v0.22.2 +-------------- + +Bugfixes: + +* In standard chess promoted pieces were incorrectly considered as + distinguishable from normal pieces with regard to position equality + and threefold repetition. Thanks to kn-sq-tb for reporting. + +Changes: + +* The PGN `game.headers` are now a custom mutable mapping that validates the + validity of tag names. +* Basic attack and pin methods moved to `BaseBoard`. +* Documentation fixes and improvements. + +New features: + +* Added `Board.lan()` for long algebraic notation. + +New in v0.22.1 +-------------- + +New features: + +* Added `Board.mirror()`, `SquareSet.mirror()` and `bswap()`. +* Added `chess.pgn.GameNode.accept_subgame()`. +* XBoard: Added `resign`, `analyze`, `exit`, `name`, `rating`, `computer`, + `egtpath`, `pause`, `resume`. Completed option parsing. + +Changes: + +* `chess.pgn`: Accept FICS wilds without warning. +* XBoard: Inform engine about game results. + +Bugfixes: + +* `chess.pgn`: Allow games without movetext. +* XBoard: Fixed draw handling. + +New in v0.22.0 +-------------- + +Changes: + +* `len(board.legal_moves)` **replaced by** `board.legal_moves.count()`. + Previously `list(board.legal_moves)` was generating moves twice, resulting in + a considerable slowdown. Thanks to Martin C. Doege for reporting. +* **Dropped Python 2.6 support.** +* XBoard: `offer_draw` renamed to `draw`. + +New features: + +* XBoard: Added `DrawHandler`. + +New in v0.21.2 +-------------- + +Changes: + +* `chess.svg` is now fully SVG Tiny 1.2 compatible. Removed + `chess.svg.DEFAULT_STYLE` which would from now on be always empty. + +New in v0.21.1 +-------------- + +Bugfixes: + +* `Board.set_piece_at()` no longer shadows optional `promoted` + argument from `BaseBoard`. +* Fixed `ThreeCheckBoard.is_irreversible()` and + `ThreeCheckBoard._transposition_key()`. + +New features: + +* Added `Game.without_tag_roster()`. `chess.pgn.StringExporter()` can now + handle games without any headers. +* XBoard: `white`, `black`, `random`, `nps`, `otim`, `undo`, `remove`. Thanks + to Manik Charan. + +Changes: + +* Documentation fixes and tweaks by Boštjan Mejak. +* Changed unicode character for empty squares in `Board.unicode()`. + +New in v0.21.0 +-------------- + +Release yanked. + +New in v0.20.1 +-------------- + +Bugfixes: + +* Fix arrow positioning on SVG boards. +* Documentation fixes and improvements, making most doctests runnable. + +New in v0.20.0 +-------------- + +Bugfixes: + +* Some XBoard commands were not returning futures. +* Support semicolon comments in PGNs. + +Changes: + +* Changed FEN and EPD formatting options. It is now possible to include en + passant squares in FEN and X-FEN style, or to include only strictly relevant + en passant squares. +* Relax en passant square validation in `Board.set_fen()`. +* Ensure `is_en_passant()`, `is_capture()`, `is_zeroing()` and + `is_irreversible()` strictly return bools. +* Accept `Z0` as a null move in PGNs. + +New features: + +* XBoard: Add `memory`, `core`, `stop` and `movenow` commands. + Abstract `post`/`nopost`. Initial `FeatureMap` support. Support `usermove`. +* Added `Board.has_pseudo_legal_en_passant()`. +* Added `Board.piece_map()`. +* Added `SquareSet.carry_rippler()`. +* Factored out some (unstable) low level APIs: `BB_CORNERS`, + `_carry_rippler()`, `_edges()`. + +New in v0.19.0 +-------------- + +New features: + +* **Experimental XBoard engine support.** Thanks to Manik Charan and + Cash Costello. Expect breaking changes in future releases. +* Added an undocumented `chess.polyglot.ZobristHasher` to make Zobrist hashing + easier to extend. + +Bugfixes: + +* Merely pseudo-legal en passant does no longer count for repetitions. +* Fixed repetition detection in Three-Check and Crazyhouse. (Previously + check counters and pockets were ignored.) +* Checking moves in Three-Check are now considered as irreversible by + `ThreeCheckBoard.is_irreversible()`. +* `chess.Move.from_uci("")` was raising `IndexError` instead of `ValueError`. + Thanks Jonny Balls. + +Changes: + +* `chess.syzygy.Tablebases` constructor no longer supports directly opening + a directory. Use `chess.syzygy.open_tablebases()`. +* `chess.gaviota.PythonTablebases` and `NativeTablebases` constructors + no longer support directly opening a directory. + Use `chess.gaviota.open_tablebases()`. +* `chess.Board` instances are now compared by the position they represent, + not by exact match of the internal data structures (or even move history). +* Relaxed castling right validation in Chess960: Kings/rooks of opposing sites + are no longer required to be on the same file. +* Removed misnamed `Piece.__unicode__()` and `BaseBoard.__unicode__()`. Use + `Piece.unicode_symbol()` and `BaseBoard.unicode()` instead. +* Changed `chess.SquareSet.__repr__()`. +* Support `[Variant "normal"]` in PGNs. +* `pip install python-chess[engine]` instead of `python-chess[uci]` (since + the extra dependencies are required for both UCI and XBoard engines). +* Mixed documentation fixes and improvements. + +New in v0.18.4 +-------------- + +Changes: + +* Support `[Variant "fischerandom"]` in PGNs for Cutechess compatibility. + Thanks to Steve Maughan for reporting. + +New in v0.18.3 +-------------- + +Bugfixes: + +* `chess.gaviota.NativeTablebases.get_dtm()` and `get_wdl()` were missing. + +New in v0.18.2 +-------------- + +Bugfixes: + +* Fixed castling in atomic chess when there is a rank attack. +* The halfmove clock in Crazyhouse is no longer incremented unconditionally. + `CrazyhouseBoard.is_zeroing(move)` now considers pawn moves and captures as + zeroing. Added `Board.is_irreversible(move)` that can be used instead. +* Fixed an inconsistency where the `chess.pgn` tokenizer accepts long algebraic + notation but `Board.parse_san()` did not. + +Changes: + +* Added more NAG constants in `chess.pgn`. + +New in v0.18.1 +-------------- + +Bugfixes: + +* Crazyhouse drops were accepted as pseudo-legal (and legal) even if the + respective piece was not in the pocket. +* `CrazyhouseBoard.pop()` was failing to undo en passant moves. +* `CrazyhouseBoard.pop()` was always returning `None`. +* `Move.__copy__()` was failing to copy Crazyhouse drops. +* Fix ~ order (marker for promoted pieces) in FENs. +* Promoted pieces in Crazyhouse were not communicated with UCI engines. + +Changes: + +* `ThreeCheckBoard.uci_variant` changed from `threecheck` to `3check`. + +New in v0.18.0 +-------------- + +Bugfixes: + +* Fixed `Board.parse_uci()` for crazyhouse drops. Thanks to Ryan Delaney. +* Fixed `AtomicBoard.is_insufficient_material()`. +* Fixed signature of `SuicideBoard.was_into_check()`. +* Explicitly close input and output streams when a `chess.uci.PopenProcess` + terminates. +* The documentation of `Board.attackers()` was wrongly stating that en passant + capturable pawns are considered attacked. + +Changes: + +* `chess.SquareSet` is no longer hashable (since it is mutable). +* Removed functions and constants deprecated in v0.17.0. +* Dropped `gmpy2` and `gmpy` as optional dependencies. They were no longer + improving performance. +* Various tweaks and optimizations for 5% improvement in PGN parsing and perft + speed. (Signature of `_is_safe` and `_ep_skewered` changed). +* Rewritten `chess.svg.board()` using `xml.etree`. No longer supports *pre* and + *post*. Use an XML parser if you need to modify the SVG. Now only inserts + actually used piece defintions. +* Untangled UCI process and engine instanciation, changing signatures of + constructors and allowing arbitrary arguments to `subprocess.Popen`. +* Coding style and documentation improvements. + +New features: + +* `chess.svg.board()` now supports arrows. Thanks to @rheber for implementing + this feature. +* Let `chess.uci.PopenEngine` consistently handle Ctrl+C across platforms + and Python versions. `chess.uci.popen_engine()` now supports a `setpgrp` + keyword argument to start the engine process in a new process group. + Thanks to @dubiousjim. +* Added `board.king(color)` to find the (royal) king of a given side. +* SVGs now have `viewBox` and `chess.svg.board(size=None)` supports and + defaults to `None` (i.e. scaling to the size of the container). + +New in v0.17.0 +-------------- + +Changes: + +* Rewritten move generator, various performance tweaks, code simplications + (500 lines removed) amounting to **doubled PGN parsing and perft speed**. +* Removed `board.generate_evasions()` and `board.generate_non_evasions()`. +* Removed `board.transpositions`. Transpositions are now counted on demand. +* `file_index()`, `rank_index()`, and `pop_count()` have been renamed to + `square_file()`, `square_rank()` and `popcount()` respectively. Aliases will + be removed in some future release. +* `STATUS_ILLEGAL_CHECK` has been renamed to `STATUS_RACE_CHECK`. The alias + will be removed in a future release. +* Removed `DIAG_ATTACKS_NE`, `DIAG_ATTACKS_NW`, `RANK_ATTACKS` and + `FILE_ATTACKS` as well as the corresponding masks. New attack tables + `BB_DIAG_ATTACKS` (combined both diagonal tables), `BB_RANK_ATTACKS` and + `BB_FILE_ATTACKS` are indexed by square instead of mask. +* `board.push()` no longer requires pseudo-legality. +* Documentation improvements. + +Bugfixes: + +* **Positions in variant end are now guaranteed to have no legal moves.** + `board.is_variant_end()` has been added to test for special variant end + conditions. Thanks to salvador-dali. +* `chess.svg`: Fixed a typo in the class names of black queens. Fixed fill + color for black rooks and queens. Added SVG Tiny support. These combined + changes fix display in a number of applications, including + Jupyter Qt Console. Thanks to Alexander Meshcheryakov. +* `board.ep_square` was not consistently `None` instead of `0`. +* Detect invalid racing kings positions: `STATUS_RACE_OVER`, + `STATUS_RACE_MATERIAL`. +* `SAN_REGEX`, `FEN_CASTLING_REGEX` and `TAG_REGEX` now try to match the + entire string and no longer accept newlines. +* Fixed `Move.__hash__()` for drops. + +New features: + +* `board.remove_piece_at()` now returns the removed piece. +* Added `square_distance()` and `square_mirror()`. +* Added `msb()`, `lsb()`, `scan_reversed()` and `scan_forward()`. +* Added `BB_RAYS` and `BB_BETWEEN`. + +New in v0.16.2 +-------------- + +Changes: + +* `board.move_stack` now contains the exact move objects added with + `Board.push()` (instead of normalized copies for castling moves). + This ensures they can be used with `Board.variation_san()` amongst others. +* `board.ep_square` is now `None` instead of `0` for no en passant square. +* `chess.svg`: Better vector graphics for knights. Thanks to ProgramFox. +* Documentation improvements. + +New in v0.16.1 +-------------- + +Bugfixes: + +* Explosions in atomic chess were not destroying castling rights. Thanks to + ProgramFOX for finding this issue. + +New in v0.16.0 +-------------- + +Bugfixes: + +* `pin_mask()`, `pin()` and `is_pinned()` make more sense when already + in check. Thanks to Ferdinand Mosca. + +New features: + +* **Variant support: Suicide, Giveaway, Atomic, King of the Hill, Racing Kings, + Horde, Three-check, Crazyhouse.** `chess.Move` now supports drops. +* More fine grained dependencies. Use *pip install python-chess[uci,gaviota]* to + install dependencies for the full feature set. +* Added `chess.STATUS_EMPTY` and `chess.STATUS_ILLEGAL_CHECK`. +* The `board.promoted` mask keeps track of promoted pieces. +* Optionally copy boards without the move stack: `board.copy(stack=False)`. +* `examples/bratko_kopec` now supports avoid move (am), variants and + displays fractional scores immidiately. Thanks to Daniel Dugovic. +* `perft.py` rewritten with multi-threading support and moved to + `examples/perft`. +* `chess.syzygy.dependencies()`, `chess.syzygy.all_dependencies()` to generate + Syzygy tablebase dependencies. + +Changes: + +* **Endgame tablebase probing (Syzygy, Gaviota):** `probe_wdl()` **,** + `probe_dtz()` **and** `probe_dtm()` **now raise** `KeyError` **or** + `MissingTableError` **instead of returning** *None*. If you prefer getting + `None` in case of an error use `get_wdl()`, `get_dtz()` and `get_dtm()`. +* `chess.pgn.BaseVisitor.result()` returns `True` by default and is no longer + used by `chess.pgn.read_game()` if no game was found. +* Non-fast-forward update of the Git repository to reduce size (old binary + test assets removed). +* `board.pop()` now uses a boardstate stack to undo moves. +* `uci.engine.position()` will send the move history only until the latest + zeroing move. +* Optimize `board.clean_castling_rights()` and micro-optimizations improving + PGN parser performance by around 20%. +* Syzygy tables now directly use the endgame name as hash keys. +* Improve test performance (especially on Travis CI). +* Documentation updates and improvements. + +New in v0.15.4 +-------------- + +New features: + +* Highlight last move and checks when rendering board SVGs. + +New in v0.15.3 +-------------- + +Bugfixes: + +* `pgn.Game.errors` was not populated as documented. Thanks to Ryan Delaney + for reporting. + +New features: + +* Added `pgn.GameNode.add_line()` and `pgn.GameNode.main_line()` which make + it easier to work with lists of moves as variations. + +New in v0.15.2 +-------------- + +Bugfixes: + +* Fix a bug where `shift_right()` and `shift_2_right()` were producing + integers larger than 64bit when shifting squares off the board. This is + very similar to the bug fixed in v0.15.1. Thanks to piccoloprogrammatore + for reporting. + +New in v0.15.1 +-------------- + +Bugfixes: + +* Fix a bug where `shift_up_right()` and `shift_up_left()` were producing + integers larger than 64bit when shifting squares off the board. + +New features: + +* Replaced __html__ with experimental SVG rendering for IPython. + +New in v0.15.0 +-------------- + +Changes: + +* `chess.uci.Score` **no longer has** `upperbound` **and** `lowerbound` + **attributes**. Previously these were always *False*. + +* Significant improvements of move generation speed, around **2.3x faster + PGN parsing**. Removed the following internal attributes and methods of + the `Board` class: `attacks_valid`, `attacks_to`, `attacks_from`, + `_pinned()`, `attacks_valid_stack`, `attacks_from_stack`, `attacks_to_stack`, + `generate_attacks()`. + +* UCI: Do not send *isready* directly after *go*. Though allowed by the UCI + protocol specification it is just not nescessary and many engines were having + trouble with this. + +* Polyglot: Use less memory for uniform random choices from big opening books + (reservoir sampling). + +* Documentation improvements. + +Bugfixes: + +* Allow underscores in PGN header tags. Found and fixed by Bajusz Tamás. + +New features: + +* Added `Board.chess960_pos()` to identify the Chess960 starting position + number of positions. + +* Added `chess.BB_BACKRANKS` and `chess.BB_PAWN_ATTACKS`. + +New in v0.14.1 +-------------- + +Bugfixes: + +* Backport Bugfix for Syzygy DTZ related to en passant. + See official-stockfish/Stockfish@6e2ca97d93812b2. + +Changes: + +* Added optional argument *max_fds=128* to `chess.syzygy.open_tablebases()`. + An LRU cache is used to keep at most *max_fds* files open. This allows using + many tables without running out of file descriptors. + Previously all tables were opened at once. + +* Syzygy and Gaviota now store absolute tablebase paths, in case you change + the working directory of the process. + +* The default implementation of `chess.uci.InfoHandler.score()` will no longer + store score bounds in `info["score"]`, only real scores. + +* Added `Board.set_chess960_pos()`. + +* Documentation improvements. + +New in v0.14.0 +-------------- + +Changes: + +* `Board.attacker_mask()` **has been renamed to** `Board.attackers_mask()` for + consistency. + +* **The signature of** `Board.generate_legal_moves()` **and** + `Board.generate_pseudo_legal_moves()` **has been changed.** Previously it + was possible to select piece types for selective move generation: + + `Board.generate_legal_moves(castling=True, pawns=True, knights=True, bishops=True, rooks=True, queens=True, king=True)` + + Now it is possible to select arbitrary sets of origin and target squares. + `to_mask` uses the corresponding rook squares for castling moves. + + `Board.generate_legal_moves(from_mask=BB_ALL, to_mask=BB)` + + To generate all knight and queen moves do: + + `board.generate_legal_moves(board.knights | board.queens)` + + To generate only castling moves use: + + `Board.generate_castling_moves(from_mask=BB_ALL, to_mask=BB_ALL)` + +* Additional hardening has been added on top of the bugfix from v0.13.3. + Diagonal skewers on the last double pawn move are now handled correctly, + even though such positions can not be reached with a sequence of legal moves. + +* `chess.syzygy` now uses the more efficient selective move generation. + +New features: + +* The following move generation methods have been added: + `Board.generate_pseudo_legal_ep(from_mask=BB_ALL, to_mask=BB_ALL)`, + `Board.generate_legal_ep(from_mask=BB_ALL, to_mask=BB_ALL)`, + `Board.generate_pseudo_legal_captures(from_mask=BB_ALL, to_mask=BB_ALL)`, + `Board.generate_legal_captures(from_mask=BB_ALL, to_mask=BB_ALL)`. + + +New in v0.13.3 +-------------- + +**This is a bugfix release for a move generation bug.** Other than the bugfix +itself there are only minimal fully backwardscompatible changes. +You should update immediately. + +Bugfixes: + +* When capturing en passant, both the capturer and the captured pawn disappear + from the fourth or fifth rank. If those pawns were covering a horizontal + attack on the king, then capturing en passant should not have been legal. + + `Board.generate_legal_moves()` and `Board.is_into_check()` have been fixed. + + The same principle applies for diagonal skewers, but nothing has been done + in this release: If the last double pawn move covers a diagonal attack, then + the king would have already been in check. + + v0.14.0 adds additional hardening for all cases. It is recommended you + upgrade to v0.14.0 as soon as you can deal with the + non-backwards compatible changes. + +Changes: + +* `chess.uci` now uses `subprocess32` if applicable (and available). + Additionally a lock is used to work around a race condition in Python 2, that + can occur when spawning engines from multiple threads at the same time. + +* Consistently handle tabs in UCI engine output. + +New in v0.13.2 +-------------- + +Changes: + +* `chess.syzygy.open_tablebases()` now raises if the given directory + does not exist. + +* Allow visitors to handle invalid `FEN` tags in PGNs. + +* Gaviota tablebase probing fails faster for piece counts > 5. + +Minor new features: + +* Added `chess.pgn.Game.from_board()`. + +New in v0.13.1 +-------------- + +Changes: + +* Missing *SetUp* tags in PGNs are ignored. + +* Incompatible comparisons on `chess.Piece`, `chess.Move`, `chess.Board` + and `chess.SquareSet` now return *NotImplemented* instead of *False*. + +Minor new features: + +* Factored out basic board operations to `chess.BaseBoard`. This is inherited + by `chess.Board` and extended with the usual move generation features. + +* Added optional *claim_draw* argument to `chess.Base.is_game_over()`. + +* Added `chess.Board.result(claim_draw=False)`. + +* Allow `chess.Board.set_piece_at(square, None)`. + +* Added `chess.SquareSet.from_square(square)`. + +New in v0.13.0 +-------------- + +* `chess.pgn.Game.export()` and `chess.pgn.GameNode.export()` have been + removed and replaced with a new visitor concept. + +* `chess.pgn.read_game()` no longer takes an `error_handler` argument. Errors + are now logged. Use the new visitor concept to change this behaviour. + +New in v0.12.5 +-------------- + +Bugfixes: + +* Context manager support for pure Python Gaviota probing code. Various + documentation fixes for Gaviota probing. Thanks to Jürgen Précour for + reporting. + +* PGN variation start comments for variations on the very first move were + assigned to the game. Thanks to Norbert Räcke for reporting. + +New in v0.12.4 +-------------- + +Bugfixes: + +* Another en passant related Bugfix for pure Python Gaviota tablebase probing. + +New features: + +* Added `pgn.GameNode.is_end()`. + +Changes: + +* Big speedup for `pgn` module. Boards are cached less agressively. Board + move stacks are copied faster. + +* Added tox.ini to specify test suite and flake8 options. + +New in v0.12.3 +-------------- + +Bugfixes: + +* Some invalid castling rights were silently ignored by `Board.set_fen()`. Now + it is ensured information is stored for retrieval using `Board.status()`. + +New in v0.12.2 +-------------- + +Bugfixes: + +* Some Gaviota probe results were incorrect for positions where black could + capture en passant. + +New in v0.12.1 +-------------- + +Changes: + +* Robust handling of invalid castling rights. You can also use the new + method `Board.clean_castling_rights()` to get the subset of strictly valid + castling rights. + +New in v0.12.0 +-------------- + +New features: + +* Python 2.6 support. Patch by vdbergh. + +* Pure Python Gaviota tablebase probing. Thanks to Jean-Noël Avila. + +New in v0.11.1 +-------------- + +Bugfixes: + +* `syzygy.Tablebases.probe_dtz()` has was giving wrong results for some + positions with possible en passant capturing. This was found and fixed + upstream: https://github.com/official-stockfish/Stockfish/issues/394. + +* Ignore extra spaces in UCI `info` lines, as for example sent by the + Hakkapeliitta engine. Thanks to Jürgen Précour for reporting. + +New in v0.11.0 +-------------- + +Changes: + +* **Chess960** support and the **representation of castling moves** has been + changed. + + The constructor of board has a new `chess960` argument, defaulting to + `False`: `Board(fen=STARTING_FEN, chess960=False)`. That property is + available as `Board.chess960`. + + In Chess960 mode the behaviour is as in the previous release. Castling moves + are represented as a king move to the corresponding rook square. + + In the default standard chess mode castling moves are represented with + the standard UCI notation, e.g. `e1g1` for king-side castling. + + `Board.uci(move, chess960=None)` creates UCI representations for moves. + Unlike `Move.uci()` it can convert them in the context of the current + position. + + `Board.has_chess960_castling_rights()` has been added to test for castling + rights that are impossible in standard chess. + + The modules `chess.polyglot`, `chess.pgn` and `chess.uci` will transparently + handle both modes. + +* In a previous release `Board.fen()` has been changed to only display an + en passant square if a legal en passant move is indeed possible. This has + now also been adapted for `Board.shredder_fen()` and `Board.epd()`. + +New features: + +* Get individual FEN components: `Board.board_fen()`, `Board.castling_xfen()`, + `Board.castling_shredder_fen()`. + +* Use `Board.has_legal_en_passant()` to test if a position has a legal + en passant move. + +* Make `repr(board.legal_moves)` human readable. + +New in v0.10.1 +-------------- + +Bugfixes: + +* Fix use-after-free in Gaviota tablebase initialization. + +New in v0.10.0 +-------------- + +New dependencies: + +* If you are using Python < 3.2 you have to install `futures` in order to + use the `chess.uci` module. + +Changes: + +* There are big changes in the UCI module. Most notably in async mode multiple + commands can be executed at the same time (e.g. `go infinite` and then + `stop` or `go ponder` and then `ponderhit`). + + `go infinite` and `go ponder` will now wait for a result, i.e. you may have + to call `stop` or `ponderhit` from a different thread or run the commands + asynchronously. + + `stop` and `ponderhit` no longer have a result. + +* The values of the color constants `chess.WHITE` and `chess.BLACK` have been + changed. Previously `WHITE` was `0`, `BLACK` was `1`. Now `WHITE` is `True`, + `BLACK` is `False`. The recommended way to invert `color` is using + `not color`. + +* The pseudo piece type `chess.NONE` has been removed in favor of just using + `None`. + +* Changed the `Board(fen)` constructor. If the optional `fen` argument is not + given behavior did not change. However if `None` is passed explicitly an + empty board is created. Previously the starting position would have been + set up. + +* `Board.fen()` will now only show completely legal en passant squares. + +* `Board.set_piece_at()` and `Board.remove_piece_at()` will now clear the + move stack, because the old moves may not be valid in the changed position. + +* `Board.parse_uci()` and `Board.push_uci()` will now accept null moves. + +* Changed shebangs from `#!/usr/bin/python` to `#!/usr/bin/env python` for + better virtualenv support. + +* Removed unused game data files from repository. + +Bugfixes: + +* PGN: Prefer the game result from the game termination marker over `*` in the + header. These should be identical in standard compliant PGNs. Thanks to + Skyler Dawson for reporting this. + +* Polyglot: `minimum_weight` for `find()`, `find_all()` and `choice()` was + not respected. + +* Polyglot: Negative indexing of opening books was raising `IndexError`. + +* Various documentation fixes and improvements. + +New features: + +* Experimental probing of Gaviota tablebases via libgtb. + +* New methods to construct boards: + + .. code:: python + + >>> chess.Board.empty() + Board('8/8/8/8/8/8/8/8 w - - 0 1') + + >>> board, ops = chess.Board.from_epd("4k3/8/8/8/8/8/8/4K3 b - - fmvn 17; hmvc 13") + >>> board + Board('4k3/8/8/8/8/8/8/4K3 b - - 13 17') + >>> ops + {'fmvn': 17, 'hmvc': 13} + +* Added `Board.copy()` and hooks to let the copy module to the right thing. + +* Added `Board.has_castling_rights(color)`, + `Board.has_kingside_castling_rights(color)` and + `Board.has_queenside_castling_rights(color)`. + +* Added `Board.clear_stack()`. + +* Support common set operations on `chess.SquareSet()`. + +New in v0.9.1 +------------- + +Bugfixes: + +* UCI module could not handle castling ponder moves. Thanks to Marco Belli for + reporting. +* The initial move number in PGNs was missing, if black was to move in the + starting position. Thanks to Jürgen Précour for reporting. +* Detect more impossible en passant squares in `Board.status()`. There already + was a requirement for a pawn on the fifth rank. Now the sixth and seventh + rank must be empty, additionally. We do not do further retrograde analysis, + because these are the only cases affecting move generation. + +New in v0.8.3 +------------- + +Bugfixes: + +* The initial move number in PGNs was missing, if black was to move in the + starting position. Thanks to Jürgen Précour for reporting. +* Detect more impossible en passant squares in `Board.status()`. There already + was a requirement for a pawn on the fifth rank. Now the sixth and seventh + rank must be empty, additionally. We do not do further retrograde analysis, + because these are the only cases affecting move generation. + +New in v0.9.0 +------------- + +**This is a big update with quite a few breaking changes. Carefully review +the changes before upgrading. It's no problem if you can not update right now. +The 0.8.x branch still gets bugfixes.** + +Incompatible changes: + +* Removed castling right constants. Castling rights are now represented as a + bitmask of the rook square. For example: + + .. code:: python + + >>> board = chess.Board() + + >>> # Standard castling rights. + >>> board.castling_rights == chess.BB_A1 | chess.BB_H1 | chess.BB_A8 | chess.BB_H8 + True + + >>> # Check for the presence of a specific castling right. + >>> can_white_castle_queenside = chess.BB_A1 & board.castling_rights + + Castling moves were previously encoded as the corresponding king movement in + UCI, e.g. `e1f1` for white kingside castling. **Now castling moves are + encoded as a move to the corresponding rook square** (`UCI_Chess960`-style), + e.g. `e1a1`. + + You may use the new methods `Board.uci(move, chess960=True)`, + `Board.parse_uci(uci)` and `Board.push_uci(uci)` to handle this + transparently. + + The `uci` module takes care of converting moves when communicating with an + engine that is not in `UCI_Chess960` mode. + +* The `get_entries_for_position(board)` method of polyglot opening book readers + has been changed to `find_all(board, minimum_weight=1)`. By default entries + with weight 0 are excluded. + +* The `Board.pieces` lookup list has been removed. + +* In 0.8.1 the spelling of repetition (was repitition) was fixed. + `can_claim_threefold_repetition()` and `is_fivefold_repetition()` are the + affected method names. Aliases are now removed. + +* `Board.set_epd()` will now interpret `bm`, `am` as a list of moves for the + current position and `pv` as a variation (represented by a list of moves). + Thanks to Jordan Bray for reporting this. + +* Removed `uci.InfoHandler.pre_bestmove()` and + `uci.InfoHandler.post_bestmove()`. + +* `uci.InfoHandler().info["score"]` is now relative to multipv. Use + + .. code:: python + + >>> with info_handler as info: + ... if 1 in info["score"]: + ... cp = info["score"][1].cp + + where you were previously using + + .. code:: python + + >>> with info_handler as info: + ... if "score" in info: + ... cp = info["score"].cp + +* Clear `uci.InfoHandler()` dictionary at the start of new searches + (new `on_go()`), not at the end of searches. + +* Renamed `PseudoLegalMoveGenerator.bitboard` and `LegalMoveGenerator.bitboard` + to `PseudoLegalMoveGenerator.board` and `LegalMoveGenerator.board`, + respectively. + +* Scripts removed. + +* Python 3.2 compatibility dropped. Use Python 3.3 or higher. Python 2.7 + support is not affected. + +New features: + +* **Introduced Chess960 support.** `Board(fen)` and `Board.set_fen(fen)` now + support X-FENs. Added `Board.shredder_fen()`. + `Board.status(allow_chess960=True)` has an optional argument allowing to + insist on standard chess castling rules. + Added `Board.is_valid(allow_chess960=True)`. + +* **Improved move generation using** `Shatranj-style direct lookup + `_. **Removed rotated bitboards. Perft + speed has been more than doubled.** + +* Added `choice(board)` and `weighted_choice(board)` for polyglot opening book + readers. + +* Added `Board.attacks(square)` to determine attacks *from* a given square. + There already was `Board.attackers(color, square)` returning attacks *to* + a square. + +* Added `Board.is_en_passant(move)`, `Board.is_capture(move)` and + `Board.is_castling(move)`. + +* Added `Board.pin(color, square)` and `Board.is_pinned(color, square)`. + +* There is a new method `Board.pieces(piece_type, color)` to get a set of + squares with the specified pieces. + +* Do expensive Syzygy table initialization on demand. + +* Allow promotions like `e8Q` (usually `e8=Q`) in `Board.parse_san()` and + PGN files. + +* Patch by Richard C. Gerkin: Added `Board.__unicode__()` just like + `Board.__str__()` but with unicode pieces. +* Patch by Richard C. Gerkin: Added `Board.__html__()`. + +New in v0.8.2 +------------- + +Bugfixes: + +* `pgn.Game.setup()` with the standard starting position was failing when the + standard starting position was already set. Thanks to Jordan Bray for + reporting this. + +Optimizations: + +* Remove `bswap()` from Syzygy decompression hot path. Directly read integers + with the correct endianness. + +New in v0.8.1 +------------- + +* Fixed pondering mode in uci module. For example `ponderhit()` was blocking + indefinitely. Thanks to Valeriy Huz for reporting this. + +* Patch by Richard C. Gerkin: Moved searchmoves to the end of the UCI go + command, where it will not cause other command parameters to be ignored. + +* Added missing check or checkmate suffix to castling SANs, e.g. `O-O-O#`. + +* Fixed off-by-one error in polyglot opening book binary search. This would + not have caused problems for real opening books. + +* Fixed Python 3 support for reverse polyglot opening book iteration. + +* Bestmoves may be literally `(none)` in UCI protocol, for example in + checkmate positions. Fix parser and return `None` as the bestmove in this + case. + +* Fixed spelling of repetition (was repitition). + `can_claim_threefold_repetition()` and `is_fivefold_repetition()` are the + affected method names. Aliases are there for now, but will be removed in the + next release. Thanks to Jimmy Patrick for reporting this. + +* Added `SquareSet.__reversed__()`. + +* Use containerized tests on Travis CI, test against Stockfish 6, improved + test coverage amd various minor clean-ups. + +New in v0.8.0 +------------- + +* **Implement Syzygy endgame tablebase probing.** + `https://syzygy-tables.info `_ + is an example project that provides a public API using the new features. + +* The interface for aynchronous UCI command has changed to mimic + `concurrent.futures`. `is_done()` is now just `done()`. Callbacks will + receive the command object as a single argument instead of the result. + The `result` property and `wait()` have been removed in favor of a + synchronously waiting `result()` method. + +* The result of the `stop` and `go` UCI commands are now named tuples (instead + of just normal tuples). + +* Add alias `Board` for `Bitboard`. + +* Fixed race condition during UCI engine startup. Lines received during engine + startup sometimes needed to be processed before the Engine object was fully + initialized. + +New in v0.7.0 +------------- + +* **Implement UCI engine communication.** + +* Patch by Matthew Lai: `Add caching for gameNode.board()`. + +New in v0.6.0 +------------- + +* If there are comments in a game before the first move, these are now assigned + to `Game.comment` instead of `Game.starting_comment`. `Game.starting_comment` + is ignored from now on. `Game.starts_variation()` is no longer true. + The first child node of a game can no longer have a starting comment. + It is possible to have a game with `Game.comment` set, that is otherwise + completely empty. + +* Fix export of games with variations. Previously the moves were exported in + an unusual (i.e. wrong) order. + +* Install `gmpy2` or `gmpy` if you want to use slightly faster binary + operations. + +* Ignore superfluous variation opening brackets in PGN files. + +* Add `GameNode.san()`. + +* Remove `sparse_pop_count()`. Just use `pop_count()`. + +* Remove `next_bit()`. Now use `bit_scan()`. + +New in v0.5.0 +------------- + +* PGN parsing is now more robust: `read_game()` ignores invalid tokens. + Still exceptions are going to be thrown on illegal or ambiguous moves, but + this behaviour can be changed by passing an `error_handler` argument. + + .. code:: python + + >>> # Raises ValueError: + >>> game = chess.pgn.read_game(file_with_illegal_moves) + + .. code:: python + + >>> # Silently ignores errors and continues parsing: + >>> game = chess.pgn.read_game(file_with_illegal_moves, None) + + .. code:: python + + >>> # Logs the error, continues parsing: + >>> game = chess.pgn.read_game(file_with_illegal_moves, logger.exception) + + If there are too many closing brackets this is now ignored. + + Castling moves like 0-0 (with zeros) are now accepted in PGNs. + The `Bitboard.parse_san()` method remains strict as always, though. + + Previously the parser was strictly following the PGN spefification in that + empty lines terminate a game. So a game like + + :: + + [Event "?"] + + { Starting comment block } + + 1. e4 e5 2. Nf3 Nf6 * + + would have ended directly after the starting comment. To avoid this, the + parser will now look ahead until it finds at least one move or a termination + marker like `*`, `1-0`, `1/2-1/2` or `0-1`. + +* Introduce a new function `scan_headers()` to quickly scan a PGN file for + headers without having to parse the full games. + +* Minor testcoverage improvements. + +New in v0.4.2 +------------- + +* Fix bug where `pawn_moves_from()` and consequently `is_legal()` weren't + handling en passant correctly. Thanks to Norbert Naskov for reporting. + +New in v0.4.1 +------------- + +* Fix `is_fivefold_repitition()`: The new fivefold repetition rule requires + the repetitions to occur on *alternating consecutive* moves. + +* Minor testing related improvements: Close PGN files, allow running via + setuptools. + +* Add recently introduced features to README. + +New in v0.4.0 +------------- + +* Introduce `can_claim_draw()`, `can_claim_fifty_moves()` and + `can_claim_threefold_repitition()`. + +* Since the first of July 2014 a game is also over (even without claim by one + of the players) if there were 75 moves without a pawn move or capture or + a fivefold repetition. Let `is_game_over()` respect that. Introduce + `is_seventyfive_moves()` and `is_fivefold_repitition()`. Other means of + ending a game take precedence. + +* Threefold repetition checking requires efficient hashing of positions + to build the table. So performance improvements were needed there. The + default polyglot compatible zobrist hashes are now built incrementally. + +* Fix low level rotation operations `l90()`, `l45()` and `r45()`. There was + no problem in core because correct versions of the functions were inlined. + +* Fix equality and inequality operators for `Bitboard`, `Move` and `Piece`. + Also make them robust against comparisons with incompatible types. + +* Provide equality and inequality operators for `SquareSet` and + `polyglot.Entry`. + +* Fix return values of incremental arithmetical operations for `SquareSet`. + +* Make `polyglot.Entry` a `collections.namedtuple`. + +* Determine and improve test coverage. + +* Minor coding style fixes. + +New in v0.3.1 +------------- + +* `Bitboard.status()` now correctly detects `STATUS_INVALID_EP_SQUARE`, + instead of errors or false reports. + +* Polyglot opening book reader now correctly handles knight underpromotions. + +* Minor coding style fixes, including removal of unused imports. + +New in v0.3.0 +------------- + +* Rename property `half_moves` of `Bitboard` to `halfmove_clock`. + +* Rename property `ply` of `Bitboard` to `fullmove_number`. + +* Let PGN parser handle symbols like `!`, `?`, `!?` and so on by converting + them to NAGs. + +* Add a human readable string representation for Bitboards. + + .. code:: python + + >>> print(chess.Bitboard()) + r n b q k b n r + p p p p p p p p + . . . . . . . . + . . . . . . . . + . . . . . . . . + . . . . . . . . + P P P P P P P P + R N B Q K B N R + +* Various documentation improvements. + +New in v0.2.0 +------------- + +* **Implement PGN parsing and writing.** +* Hugely improve test coverage and use Travis CI for continuous integration and + testing. +* Create an API documentation. +* Improve Polyglot opening-book handling. + +New in v0.1.0 +------------- + +Apply the lessons learned from the previous releases, redesign the API and +implement it in pure Python. + +New in v0.0.4 +------------- + +Implement the basics in C++ and provide bindings for Python. Obviously +performance was a lot better - but at the expense of having to compile +code for the target platform. + +Pre v0.0.4 +---------- + +First experiments with a way too slow pure Python API, creating way too many +objects for basic operations. diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 59203f672..48fe80784 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -27,1884 +27,4 @@ Bugfixes: New in v1.0.0 ------------- -Changes: - -* Now requires Python 3.7+. -* `chess.engine` will now cut off illegal principal variations at the first - illegal move instead of discarding them entirely. -* `chess.engine.EngineProtocol` renamed to `chess.engine.Protocol`. -* `chess.engine.Option` is no longer a named tuple. -* Renamed `chess.gaviota` internals. -* Relaxed type annotations of `chess.pgn.GameNode.variation()` and related - methods. -* Changed default colors of `chess.svg.Arrow` and - `chess.pgn.GameNode.arrows()`. These can be overriden with the new - `chess.svg.board(..., colors)` feature. -* Documentation improvements. Will now show type aliases like `chess.Square` - instead of `int`. - -Bugfixes: - -* Fix insufficient material with same-color bishops on both sides. -* Clarify that `chess.Board.can_claim_draw()` and related methods refer to - claims by the player to move. Three-fold repetition could already be claimed - before making the final repeating move. `chess.Board.can_claim_fifty_moves()` - now also allows a claim before the final repeating move. The previous - behavior is `chess.Board.is_fifty_moves()`. -* Fix parsing of green arrows/circles in `chess.pgn.GameNode.arrows()`. -* Fix overloaded type signature of `chess.engine.Protocol.engine()`. - -New features: - -* Added `chess.parse_square()`, to be used instead of - `chess.SQUARE_NAMES.index()`. -* Added `chess.Board.apply_mirror()`. -* Added `chess.svg.board(..., colors)`, to allow overriding the default theme. - -New in v0.31.4 --------------- - -Bugfixes: - -* Fix inconsistency where `board.is_legal()` was not accepting castling moves - in Chess960 notation (when board is in standard mode), while all other - methods did. -* Fix `chess.pgn.GameNode.set_clock()` with negative or floating point values. -* Avoid leading and trailing spaces in PGN comments when setting annotations. - -New features: - -* Finish typing and declare support for mypy. - -New in v0.31.3 --------------- - -Bugfixes: - -* Custom castling rights assigned to `board.castling_rights` or castling rights - left over after `Board.set_board_fen()` were not correctly cleaned after - the first move. - -Changes: - -* Ignore up to one consecutive empty line between PGN headers. -* Added PGN Variant `From Position` as an alias for standard chess. -* `chess.pgn.FileExporter.result()` now returns the number of written - characters. -* `chess.engine` now avoids sending 0 for search limits, which some engines - misunderstand as no limit. -* `chess.engine` better handles null moves sent to the engine. -* `chess.engine` now gracefully handles `NULL` ponder moves and uppercase - moves received from UCI engines, which is technically invalid. - -New features: - -* Added `chess.pgn.GameNode.{clock, set_clock}()` to read and write - `[%clk ...]` **PGN annotations**. -* Added `chess.pgn.GameNode.{arrows, set_arrows}()` to read and write - `[%csl ...]` and `[%cal ...]` PGN annotations. -* Added `chess.pgn.GameNode.{eval, set_eval}()` to read and write - `[%eval ...]` PGN annotations. -* Added `SquareSet.ray(a, b)` and `SquareSet.between(a, b)`. - -New in v0.31.2 --------------- - -Bugfixes: - -* Fix rejected/accepted in `chess.engine.XBoardProtocol`. -* Misc typing fixes. - -Changes: - -* Deprecated `chess.syzygy.is_table_name()`. Replaced with - `chess.syzygy.is_tablename()` which has additional parameters and defaults to - `one_king`. -* Take advantage of `int.bit_count()` coming in Python 3.10. - -New in v0.31.1 --------------- - -Bugfixes: - -* `RacingKingsBoard.is_variant_win()` no longer incorrectly returns `True` - for drawn positions. -* Multiple moves for EPD opcodes *am* and *bm* are now sorted as required by - the specification. -* Coordinates of SVG boards are now properly aligned, even when rendered as - SVG Tiny. - -Changes: - -* SVG boards now have a background color for the coordinate margin, making - coordinates readable on dark backgrounds. -* Added *[Variant "Illegal"]* as an alias for standard chess - (used by Chessbase). - -Features: - -* Added `Board.find_move()`, useful for finding moves that match human input. - -New in v0.31.0 --------------- - -Changes: - -* Replaced lookup table `chess.BB_BETWEEN[a][b]` with a function - `chess.between(a, b)`. Improves initialization and runtime performance. -* `chess.pgn.BaseVisitor.result()` is now an abstract method, forcing - subclasses to implement it. -* Removed helper attributes from `chess.engine.InfoDict`. Instead it is now - a `TypedDict`. -* `chess.engine.PovScore` equality is now semantic instead of structural: - Scores compare equal to the negative score from the opposite point of view. - -Bugfixes: - -* `chess.Board.is_irreversible()` now considers ceding legal en passant - captures as irreversible. Also documented that false-negatives due to forced - lines are by design. -* Fixed stack overflow in `chess.pgn` when exporting, visiting or getting the - final board of a very long game. -* Clarified documentation regarding board validity. -* `chess.pgn.GameNode.__repr__()` no longer errors if the root node has invalid - FEN or Variant headers. -* Carriage returns are no longer allowed in PGN header values, fixing - reparsability. -* Fixed type error when XBoard name or egt features have a value that looks - like an integer. -* `chess.engine` is now passing type checks with mypy. -* `chess.gaviota` is now passing type checks with mypy. - -Features: - -* Added `chess.Board.gives_check()`. -* `chess.engine.AnalysisResult.wait()` now returns `chess.engine.BestMove`. -* Added `empty_square` parameter for `chess.Board.unicode()` with better - aligned default (⭘). - -New in v0.30.1 --------------- - -Changes: - -* Positions with more than two checkers are considered invalid and - `board.status()` returns `chess.STATUS_TOO_MANY_CHECKERS`. -* Pawns drops in Crazyhouse are considered zeroing and reset - `board.halfmove_clock` when played. -* Now validating file sizes when opening Syzygy tables and Polyglot opening - books. -* Explicitly warn about untrusted tablebase files and chess engines. - -Bugfixes: - -* Fix Racing Kings game end detection: Black cannot catch up if their own - pieces block the goal. White would win on the next turn, so this did not - impact the game theoretical outcome of the game. -* Fix bugs discovered by fuzzing the EPD parser: Fixed serialization of - empty strings, reparsability of empty move lists, handling of non-finite - floats, and handling of whitespace in opcodes. - -Features: - -* Added `board.checkers()`, returning a set of squares with the pieces giving - check. - -New in v0.30.0 --------------- - -Changes: - -* **Dropped support for Python 3.5.** -* Remove explicit loop arguments in `chess.engine` module, following - https://bugs.python.org/issue36373. - -Bugfixes: - -* `chess.engine.EngineProtocol.returncode` is no longer poisoned when - `EngineProtocol.quit()` times out. -* `chess.engine.PlayResult.info` was not always of type - `chess.engine.InfoDict`. - -Features: - -* The background thread spawned by `chess.engine.SimpleEngine` is now named - for improved debuggability, revealing the PID of the engine process. -* `chess.engine.EventLoopPolicy` now supports `asyncio.PidfdChildWatcher` - when running on Python 3.9+ and Linux 5.3+. -* Add `chess.Board.san_and_push()`. - -New in v0.29.0 --------------- - -Changes: - -* `chess.variant.GiveawayBoard` **now starts with castling rights**. - `chess.variant.AntichessBoard` is the same variant without castling rights. -* UCI info parser no longer reports errors when encountering unknown tokens. -* Performance improvements for repetition detection. -* Since Python 3.8: `chess.syzygy`/`chess.polyglot` use `madvise(MADV_RANDOM)` - to prepare table/book files for random access. - -Bugfixes: - -* Fix syntax error in type annotation of `chess.engine.run_in_background()`. -* Fix castling rights when king is exploded in Atomic. Mitigated by the fact - that the game is over and that it did not affect FEN. -* Fix insufficient material with underpromoted pieces in Crazyhouse. Mitigated - by the fact that affected positions are unreachable in Crazyhouse. - -Features: - -* Support `wdl` in UCI info (usually activated with `UCI_ShowWDL`). - -New in v0.28.3 --------------- - -Bugfixes: - -* Follow FICS rules in Atomic castling edge cases. -* Handle self-reported errors by XBoard engines "Error: ..." or - "Illegal move: ...". - -New in v0.28.2 --------------- - -Bugfixes: - -* Fixed exception propagation, when a UCI engine sends an invalid `bestmove`. - Thanks @fsmosca. - -Changes: - -* `chess.Move.from_uci()` no longer accepts moves from and to the same square, - for example `a1a1`. `0000` is now the only valid null move notation. - -New in v0.28.1 --------------- - -Bugfixes: - -* The minimum Python version is 3.5.3 (instead of 3.5.0). -* Fix `board.is_irreversible()` when capturing a rook that had castling rights. - -Changes: - -* `is_en_passant()`, `is_capture()`, `is_zeroing()`, `is_irreversible()`, - `is_castling()`, `is_kingside_castling()` and `is_queenside_castling()` - now consistently return `False` for null moves. -* Added `chess.engine.InfoDict` class with typed shorthands for common keys. -* Support `[Variant "3-check"]` (from chess.com PGNs). - -New in v0.28.0 --------------- - -Changes: - -* Dropped support for Python 3.4 (end of life reached). -* `chess.polyglot.Entry.move` **is now a property instead of a method**. - The raw move is now always decoded in the context of the position (relevant - for castling moves). -* `Piece`, `Move`, `BaseBoard` and `Board` comparisons no longer support - duck typing. -* FENs sent to engines now always include potential en passant squares, even if - no legal en passant capture exists. -* Circular SVG arrows now have a `circle` CSS class. -* Superfluous dashes (-) in EPDs are no longer treated as opcodes. -* Removed `GameCreator`, `HeaderCreator` and `BoardCreator` aliases for - `{Game,Headers,Board}Builder`. - -Bugfixes: - -* Notation like `Kh1` is no longer accepted for castling moves. -* Remove stale files from wheels published on PyPI. -* Parsing Three-Check EPDs with moves was always failing. -* Some methods in `chess.variant` were returning bool-ish integers, when they - should have returned `bool`. -* `chess.engine`: Fix line decoding when Windows line-endings arrive seperately - in stdout buffer. -* `chess.engine`: Survive timeout in analysis. -* `chess.engine`: Survive unexpected `bestmove` sent by misbehaving UCI engines. - -New features: - -* **Experimental type signatures for almost all public APIs** (`typing`). - Some modules do not yet internally pass typechecking. -* Added `Board.color_at(square)`. -* Added `chess.engine.AnalysisResult.get()` and `empty()`. -* `chess.engine`: The `UCI_AnalyseMode` option is still automatically managed, - but can now be overwritten. -* `chess.engine.EngineProtocol` and constructors now optionally take - an explicit `loop` argument. - -New in v0.27.3 --------------- - -Changes: - -* `XBoardProtocol` will no longer raise an exception when the engine resigned. - Instead it sets a new flag `PlayResult.resigned`. `resigned` and - `draw_offered` are keyword-only arguments. -* Renamed `chess.pgn.{Game,Header,Board}Creator` to - `{Game,Headers,Board}Builder`. Aliases kept in place. - -Bugfixes: - -* Make `XBoardProtocol` robust against engines that send a move after claiming - a draw or resigning. Thanks @pascalgeo. -* `XBoardProtocol` no longer ignores `Hint:` sent by the engine. -* Fix handling of illegal moves in `XBoardProtocol`. -* Fix exception when engine is shut down while pondering. -* Fix unhandled internal exception and file descriptor leak when engine - initialization fails. -* Fix `HordeBoard.status()` when black pieces are on the first rank. - Thanks @Wisling. - -New features: - -* Added `chess.pgn.Game.builder()`, `chess.pgn.Headers.builder()` and - `chess.pgn.GameNode.dangling_node()` to simplify subclassing `GameNode`. -* `EngineProtocol.communicate()` is now also available in the synchronous API. - -New in v0.27.2 --------------- - -Bugfixes: - -* `chess.engine.XBoardProtocol.play()` was searching 100 times longer than - intended when using `chess.engine.Limit.time`, and searching 100 times more - nodes than intended when using `chess.engine.Limit.nodes`. Thanks @pascalgeo. - -New in v0.27.1 --------------- - -Bugfixes: - -* `chess.engine.XBoardProtocol.play()` was raising `KeyError` when using time - controls with increment or remaining moves. Thanks @pascalgeo. - -New in v0.27.0 --------------- - -This is the second **release candidate for python-chess 1.0**. If you see the -need for breaking changes, please speak up now! - -Bugfixes: - -* `EngineProtocol.analyse(*, multipv)` was not passing this argument to the - engine and therefore only returned the first principal variation. - Thanks @svangordon. -* `chess.svg.board(*, squares)`: The X symbol on selected squares is now more - visible when it overlaps pieces. - -Changes: - -* **FEN/EPD parsing is now more relaxed**: Incomplete FENs and EPDs are - completed with reasonable defaults (`w - - 0 1`). The EPD parser accepts - fields with moves in UCI notation (for example the technically invalid - `bm g1f3` instead of `bm Nf3`). -* The PGN parser now skips games with invalid FEN headers and variations after - an illegal move (after handling the error as usual). - -New features: - -* Added `Board.is_repetition(count=3)`. -* Document that `chess.engine.EngineProtocol` is compatible with - AsyncSSH 1.16.0. - -New in v0.26.0 --------------- - -This is the first **release candidate for python-chess 1.0**. If you see the -need for breaking changes, please speak up now! - -Changes: - -* `chess.engine` **is now stable and replaces** - `chess.uci` **and** `chess.xboard`. -* Advanced: `EngineProtocol.initialize()` is now public for use with custom - transports. -* Removed `__ne__` implementations (not required since Python 3). -* Assorted documentation and coding-style improvements. - -New features: - -* Check insufficient material for a specific side: - `board.has_insufficient_material(color)`. -* Copy boards with limited stack depth: `board.copy(stack=depth)`. - -Bugfixes: - -* Properly handle delayed engine errors, for example unsupported options. - -New in v0.25.1 --------------- - -Bugfixes: - -* `chess.engine` did not correctly handle Windows-style line endings. - Thanks @Bstylestuff. - -New in v0.25.0 --------------- - -New features: - -* This release introduces a new **experimental API for chess engine - communication**, `chess.engine`, based on `asyncio`. It is intended to - eventually replace `chess.uci` and `chess.xboard`. - -Bugfixes: - -* Fixed race condition in LRU-cache of open Syzygy tables. The LRU-cache is - enabled by default (*max_fds*). -* Fix deprecation warning and unclosed file in setup.py. - Thanks Mickaël Schoentgen. - -Changes: - -* `chess.pgn.read_game()` now ignores BOM at the start of the stream. -* Removed deprecated items. - -New in v0.24.2 --------------- - -Bugfixes: - -* `CrazyhouseBoard.root()` and `ThreeCheckBoard.root()` were not returning the - correct pockets and number of remaining checks, respectively. Thanks @gbtami. -* `chess.pgn.skip_game()` now correctly skips PGN comments that contain - line-breaks and PGN header tag notation. - -Changes: - -* Renamed `chess.pgn.GameModelCreator` to `GameCreator`. Alias kept in place - and will be removed in a future release. -* Renamed `chess.engine` to `chess._engine`. Use re-exports from `chess.uci` - or `chess.xboard`. -* Renamed `Board.stack` to `Board._stack`. Do not use this directly. -* Improved memory usage: `Board.legal_moves` and `Board.pseudo_legal_moves` - no longer create reference cycles. PGN visitors can manage headers - themselves. -* Removed previously deprecated items. - -Features: - -* Added `chess.pgn.BaseVisitor.visit_board()` and `chess.pgn.BoardCreator`. - -New in v0.24.1, v0.23.11 ------------------------- - -Bugfixes: - -* Fix `chess.Board.set_epd()` and `chess.Board.from_epd()` with semicolon - in string operand. Thanks @jdart1. -* `chess.pgn.GameNode.uci()` was always raising an exception. - Also included in v0.24.0. - -New in v0.24.0 --------------- - -This release **drops support for Python 2**. The *0.23.x* branch will be -maintained for one more month. - -Changes: - -* **Require Python 3.4.** Thanks @hugovk. -* No longer using extra pip features: - `pip install python-chess[engine,gaviota]` is now `pip install python-chess`. -* Various keyword arguments can now be used as **keyword arguments only**. -* `chess.pgn.GameNode.accept()` now - **also visits the move leading to that node**. -* `chess.pgn.GameModelCreator` now requires that `begin_game()` be called. -* `chess.pgn.scan_headers()` and `chess.pgn.scan_offsets()` have been removed. - Instead the new functions `chess.pgn.read_headers()` and - `chess.pgn.skip_game()` can be used for a similar purpose. -* `chess.syzygy`: Invalid magic headers now raise `IOError`. Previously they - were only checked in an assertion. - `type(board).{tbw_magic,tbz_magic,pawnless_tbw_magic,pawnless_tbz_magic}` - are now byte literals. -* `board.status()` constants (`STATUS_`) are now typed using `enum.IntFlag`. - Values remain unchanged. -* `chess.svg.Arrow` is no longer a `namedtuple`. -* `chess.PIECE_SYMBOLS[0]` and `chess.PIECE_NAMES[0]` are now `None` instead - of empty strings. -* Performance optimizations: - - * `chess.pgn.Game.from_board()`, - * `chess.square_name()` - * Replace `collections.deque` with lists almost everywhere. - -* Renamed symbols (aliases will be removed in the next release): - - * `chess.BB_VOID` -> `BB_EMPTY` - * `chess.bswap()` -> `flip_vertical()` - * `chess.pgn.GameNode.main_line()` -> `mainline_moves()` - * `chess.pgn.GameNode.is_main_line()` -> `is_mainline()` - * `chess.variant.BB_HILL` -> `chess.BB_CENTER` - * `chess.syzygy.open_tablebases()` -> `open_tablebase()` - * `chess.syzygy.Tablebases` -> `Tablebase` - * `chess.syzygy.Tablebase.open_directory()` -> `add_directory()` - * `chess.gaviota.open_tablebases()` -> `open_tablebase()` - * `chess.gaviota.open_tablebases_native()` -> `open_tablebase_native()` - * `chess.gaviota.NativeTablebases` -> `NativeTablebase` - * `chess.gaviota.PythonTablebases` -> `PythonTablebase` - * `chess.gaviota.NativeTablebase.open_directory()` -> `add_directory()` - * `chess.gaviota.PythonTablebase.open_directory()` -> `add_directory()` - -Bugfixes: - -* The PGN parser now gives the visitor a chance to handle unknown chess - variants and continue parsing. -* `chess.pgn.GameNode.uci()` was always raising an exception. - -New features: - -* `chess.SquareSet` now extends `collections.abc.MutableSet` and can be - initialized from iterables. -* `board.apply_transform(f)` and `board.transform(f)` can apply bitboard - transformations to a position. Examples: - `chess.flip_{vertical,horizontal,diagonal,anti_diagonal}`. -* `chess.pgn.GameNode.mainline()` iterates over nodes of the mainline. - Can also be used with `reversed()`. Reversal is now also supported for - `chess.pgn.GameNode.mainline_moves()`. -* `chess.svg.Arrow(tail, head, color="#888")` gained an optional *color* - argument. -* `chess.pgn.BaseVisitor.parse_san(board, san)` is used by parsers and can - be overwritten to deal with non-standard input formats. -* `chess.pgn`: Visitors can advise the parser to skip games or variations by - returning the special value `chess.pgn.SKIP` from `begin_game()`, - `end_headers()` or `begin_variation()`. This is only a hint. - The corresponding `end_game()` or `end_variation()` will still be called. -* Added `chess.svg.MARGIN`. - -New in v0.23.10 ---------------- - -Bugfixes: - -* `chess.SquareSet` now correctly handles negative masks. Thanks @hasnul. -* `chess.pgn` now accepts `[Variant "chess 960"]` (with the space). - -New in v0.23.9 --------------- - -Changes: - -* Updated `Board.is_fivefold_repetition()`. FIDE rules have changed and the - repetition no longer needs to occur on consecutive alternating moves. - Thanks @LegionMammal978. - -New in v0.23.8 --------------- - -Bugfixes: - -* `chess.syzygy`: Correctly initialize wide DTZ map for experimental 7 piece - table KRBBPvKQ. - -New in v0.23.7 --------------- - -Bugfixes: - -* Fixed `ThreeCheckBoard.mirror()` and `CrazyhouseBoard.mirror()`, which - were previously resetting remaining checks and pockets respectively. - Thanks @QueensGambit. - -Changes: - -* `Board.move_stack` is now guaranteed to be UCI compatible with respect to - the representation of castling moves and `board.chess960`. -* Drop support for Python 3.3, which is long past end of life. -* `chess.uci`: The `position` command now manages `UCI_Chess960` and - `UCI_Variant` automatically. -* `chess.uci`: The `position` command will now always send the entire history - of moves from the root position. -* Various coding style fixes and improvements. Thanks @hugovk. - -New features: - -* Added `Board.root()`. - -New in v0.23.6 --------------- - -Bugfixes: - -* Gaviota: Fix Python based Gaviota tablebase probing when there are multiple - en passant captures. Thanks @bjoernholzhauer. -* Syzygy: Fix DTZ for some mate in 1 positions. Similarly to the fix from - v0.23.1 this is mostly cosmetic. -* Syzygy: Fix DTZ off-by-one in some 6 piece antichess positions with moves - that threaten to force a capture. This is mostly cosmetic. - -Changes: - -* Let `uci.Engine.position()` send history of at least 8 moves if available. - Previously it sent only moves that were relevant for repetition detection. - This is mostly useful for Lc0. Once performance issues are solved, a future - version will always send the entire history. Thanks @SashaMN and @Mk-Chan. -* Various documentation fixes and improvements. - -New features: - -* Added `polyglot.MemoryMappedReader.get(board, default=None)`. - -New in v0.23.5 --------------- - -Bugfixes: - -* Atomic chess: KNvKN is not insufficient material. -* Crazyhouse: Detect insufficient material. This can not happen unless the - game was started with insufficient material. - -Changes: - -* Better error messages when parsing info from UCI engine fails. -* Better error message for `b.set_board_fen(b.fen())`. - -New in v0.23.4 --------------- - -New features: - -* XBoard: Support pondering. Thanks Manik Charan. -* UCI: Support unofficial `info ebf`. - -Bugfixes: - -* Implement 16 bit DTZ mapping, which is required for some of the longest - 7 piece endgames. - -New in v0.23.3 --------------- - -New features: - -* XBoard: Support `variant`. Thanks gbtami. - -New in v0.23.2 --------------- - -Bugfixes: - -* XBoard: Handle multiple features and features with spaces. Thanks gbtami. -* XBoard: Ignore debug output prefixed with `#`. Thanks Dan Ravensloft and - Manik Charan. - -New in v0.23.1 --------------- - -Bugfixes: - -* Fix DTZ in case of mate in 1. This is a cosmetic fix, as the previous - behavior was only off by one (which is allowed by design). - -New in v0.23.0 --------------- - -New features: - -* Experimental support for 7 piece Syzygy tablebases. - -Changes: - -* `chess.syzygy.filenames()` was renamed to `tablenames()` and - gained an optional `piece_count=6` argument. -* `chess.syzygy.normalize_filename()` was renamed to `normalize_tablename()`. -* The undocumented constructors of `chess.syzygy.WdlTable` and - `chess.syzygy.DtzTable` have been changed. - -New in v0.22.2 --------------- - -Bugfixes: - -* In standard chess promoted pieces were incorrectly considered as - distinguishable from normal pieces with regard to position equality - and threefold repetition. Thanks to kn-sq-tb for reporting. - -Changes: - -* The PGN `game.headers` are now a custom mutable mapping that validates the - validity of tag names. -* Basic attack and pin methods moved to `BaseBoard`. -* Documentation fixes and improvements. - -New features: - -* Added `Board.lan()` for long algebraic notation. - -New in v0.22.1 --------------- - -New features: - -* Added `Board.mirror()`, `SquareSet.mirror()` and `bswap()`. -* Added `chess.pgn.GameNode.accept_subgame()`. -* XBoard: Added `resign`, `analyze`, `exit`, `name`, `rating`, `computer`, - `egtpath`, `pause`, `resume`. Completed option parsing. - -Changes: - -* `chess.pgn`: Accept FICS wilds without warning. -* XBoard: Inform engine about game results. - -Bugfixes: - -* `chess.pgn`: Allow games without movetext. -* XBoard: Fixed draw handling. - -New in v0.22.0 --------------- - -Changes: - -* `len(board.legal_moves)` **replaced by** `board.legal_moves.count()`. - Previously `list(board.legal_moves)` was generating moves twice, resulting in - a considerable slowdown. Thanks to Martin C. Doege for reporting. -* **Dropped Python 2.6 support.** -* XBoard: `offer_draw` renamed to `draw`. - -New features: - -* XBoard: Added `DrawHandler`. - -New in v0.21.2 --------------- - -Changes: - -* `chess.svg` is now fully SVG Tiny 1.2 compatible. Removed - `chess.svg.DEFAULT_STYLE` which would from now on be always empty. - -New in v0.21.1 --------------- - -Bugfixes: - -* `Board.set_piece_at()` no longer shadows optional `promoted` - argument from `BaseBoard`. -* Fixed `ThreeCheckBoard.is_irreversible()` and - `ThreeCheckBoard._transposition_key()`. - -New features: - -* Added `Game.without_tag_roster()`. `chess.pgn.StringExporter()` can now - handle games without any headers. -* XBoard: `white`, `black`, `random`, `nps`, `otim`, `undo`, `remove`. Thanks - to Manik Charan. - -Changes: - -* Documentation fixes and tweaks by Boštjan Mejak. -* Changed unicode character for empty squares in `Board.unicode()`. - -New in v0.21.0 --------------- - -Release yanked. - -New in v0.20.1 --------------- - -Bugfixes: - -* Fix arrow positioning on SVG boards. -* Documentation fixes and improvements, making most doctests runnable. - -New in v0.20.0 --------------- - -Bugfixes: - -* Some XBoard commands were not returning futures. -* Support semicolon comments in PGNs. - -Changes: - -* Changed FEN and EPD formatting options. It is now possible to include en - passant squares in FEN and X-FEN style, or to include only strictly relevant - en passant squares. -* Relax en passant square validation in `Board.set_fen()`. -* Ensure `is_en_passant()`, `is_capture()`, `is_zeroing()` and - `is_irreversible()` strictly return bools. -* Accept `Z0` as a null move in PGNs. - -New features: - -* XBoard: Add `memory`, `core`, `stop` and `movenow` commands. - Abstract `post`/`nopost`. Initial `FeatureMap` support. Support `usermove`. -* Added `Board.has_pseudo_legal_en_passant()`. -* Added `Board.piece_map()`. -* Added `SquareSet.carry_rippler()`. -* Factored out some (unstable) low level APIs: `BB_CORNERS`, - `_carry_rippler()`, `_edges()`. - -New in v0.19.0 --------------- - -New features: - -* **Experimental XBoard engine support.** Thanks to Manik Charan and - Cash Costello. Expect breaking changes in future releases. -* Added an undocumented `chess.polyglot.ZobristHasher` to make Zobrist hashing - easier to extend. - -Bugfixes: - -* Merely pseudo-legal en passant does no longer count for repetitions. -* Fixed repetition detection in Three-Check and Crazyhouse. (Previously - check counters and pockets were ignored.) -* Checking moves in Three-Check are now considered as irreversible by - `ThreeCheckBoard.is_irreversible()`. -* `chess.Move.from_uci("")` was raising `IndexError` instead of `ValueError`. - Thanks Jonny Balls. - -Changes: - -* `chess.syzygy.Tablebases` constructor no longer supports directly opening - a directory. Use `chess.syzygy.open_tablebases()`. -* `chess.gaviota.PythonTablebases` and `NativeTablebases` constructors - no longer support directly opening a directory. - Use `chess.gaviota.open_tablebases()`. -* `chess.Board` instances are now compared by the position they represent, - not by exact match of the internal data structures (or even move history). -* Relaxed castling right validation in Chess960: Kings/rooks of opposing sites - are no longer required to be on the same file. -* Removed misnamed `Piece.__unicode__()` and `BaseBoard.__unicode__()`. Use - `Piece.unicode_symbol()` and `BaseBoard.unicode()` instead. -* Changed `chess.SquareSet.__repr__()`. -* Support `[Variant "normal"]` in PGNs. -* `pip install python-chess[engine]` instead of `python-chess[uci]` (since - the extra dependencies are required for both UCI and XBoard engines). -* Mixed documentation fixes and improvements. - -New in v0.18.4 --------------- - -Changes: - -* Support `[Variant "fischerandom"]` in PGNs for Cutechess compatibility. - Thanks to Steve Maughan for reporting. - -New in v0.18.3 --------------- - -Bugfixes: - -* `chess.gaviota.NativeTablebases.get_dtm()` and `get_wdl()` were missing. - -New in v0.18.2 --------------- - -Bugfixes: - -* Fixed castling in atomic chess when there is a rank attack. -* The halfmove clock in Crazyhouse is no longer incremented unconditionally. - `CrazyhouseBoard.is_zeroing(move)` now considers pawn moves and captures as - zeroing. Added `Board.is_irreversible(move)` that can be used instead. -* Fixed an inconsistency where the `chess.pgn` tokenizer accepts long algebraic - notation but `Board.parse_san()` did not. - -Changes: - -* Added more NAG constants in `chess.pgn`. - -New in v0.18.1 --------------- - -Bugfixes: - -* Crazyhouse drops were accepted as pseudo-legal (and legal) even if the - respective piece was not in the pocket. -* `CrazyhouseBoard.pop()` was failing to undo en passant moves. -* `CrazyhouseBoard.pop()` was always returning `None`. -* `Move.__copy__()` was failing to copy Crazyhouse drops. -* Fix ~ order (marker for promoted pieces) in FENs. -* Promoted pieces in Crazyhouse were not communicated with UCI engines. - -Changes: - -* `ThreeCheckBoard.uci_variant` changed from `threecheck` to `3check`. - -New in v0.18.0 --------------- - -Bugfixes: - -* Fixed `Board.parse_uci()` for crazyhouse drops. Thanks to Ryan Delaney. -* Fixed `AtomicBoard.is_insufficient_material()`. -* Fixed signature of `SuicideBoard.was_into_check()`. -* Explicitly close input and output streams when a `chess.uci.PopenProcess` - terminates. -* The documentation of `Board.attackers()` was wrongly stating that en passant - capturable pawns are considered attacked. - -Changes: - -* `chess.SquareSet` is no longer hashable (since it is mutable). -* Removed functions and constants deprecated in v0.17.0. -* Dropped `gmpy2` and `gmpy` as optional dependencies. They were no longer - improving performance. -* Various tweaks and optimizations for 5% improvement in PGN parsing and perft - speed. (Signature of `_is_safe` and `_ep_skewered` changed). -* Rewritten `chess.svg.board()` using `xml.etree`. No longer supports *pre* and - *post*. Use an XML parser if you need to modify the SVG. Now only inserts - actually used piece defintions. -* Untangled UCI process and engine instanciation, changing signatures of - constructors and allowing arbitrary arguments to `subprocess.Popen`. -* Coding style and documentation improvements. - -New features: - -* `chess.svg.board()` now supports arrows. Thanks to @rheber for implementing - this feature. -* Let `chess.uci.PopenEngine` consistently handle Ctrl+C across platforms - and Python versions. `chess.uci.popen_engine()` now supports a `setpgrp` - keyword argument to start the engine process in a new process group. - Thanks to @dubiousjim. -* Added `board.king(color)` to find the (royal) king of a given side. -* SVGs now have `viewBox` and `chess.svg.board(size=None)` supports and - defaults to `None` (i.e. scaling to the size of the container). - -New in v0.17.0 --------------- - -Changes: - -* Rewritten move generator, various performance tweaks, code simplications - (500 lines removed) amounting to **doubled PGN parsing and perft speed**. -* Removed `board.generate_evasions()` and `board.generate_non_evasions()`. -* Removed `board.transpositions`. Transpositions are now counted on demand. -* `file_index()`, `rank_index()`, and `pop_count()` have been renamed to - `square_file()`, `square_rank()` and `popcount()` respectively. Aliases will - be removed in some future release. -* `STATUS_ILLEGAL_CHECK` has been renamed to `STATUS_RACE_CHECK`. The alias - will be removed in a future release. -* Removed `DIAG_ATTACKS_NE`, `DIAG_ATTACKS_NW`, `RANK_ATTACKS` and - `FILE_ATTACKS` as well as the corresponding masks. New attack tables - `BB_DIAG_ATTACKS` (combined both diagonal tables), `BB_RANK_ATTACKS` and - `BB_FILE_ATTACKS` are indexed by square instead of mask. -* `board.push()` no longer requires pseudo-legality. -* Documentation improvements. - -Bugfixes: - -* **Positions in variant end are now guaranteed to have no legal moves.** - `board.is_variant_end()` has been added to test for special variant end - conditions. Thanks to salvador-dali. -* `chess.svg`: Fixed a typo in the class names of black queens. Fixed fill - color for black rooks and queens. Added SVG Tiny support. These combined - changes fix display in a number of applications, including - Jupyter Qt Console. Thanks to Alexander Meshcheryakov. -* `board.ep_square` was not consistently `None` instead of `0`. -* Detect invalid racing kings positions: `STATUS_RACE_OVER`, - `STATUS_RACE_MATERIAL`. -* `SAN_REGEX`, `FEN_CASTLING_REGEX` and `TAG_REGEX` now try to match the - entire string and no longer accept newlines. -* Fixed `Move.__hash__()` for drops. - -New features: - -* `board.remove_piece_at()` now returns the removed piece. -* Added `square_distance()` and `square_mirror()`. -* Added `msb()`, `lsb()`, `scan_reversed()` and `scan_forward()`. -* Added `BB_RAYS` and `BB_BETWEEN`. - -New in v0.16.2 --------------- - -Changes: - -* `board.move_stack` now contains the exact move objects added with - `Board.push()` (instead of normalized copies for castling moves). - This ensures they can be used with `Board.variation_san()` amongst others. -* `board.ep_square` is now `None` instead of `0` for no en passant square. -* `chess.svg`: Better vector graphics for knights. Thanks to ProgramFox. -* Documentation improvements. - -New in v0.16.1 --------------- - -Bugfixes: - -* Explosions in atomic chess were not destroying castling rights. Thanks to - ProgramFOX for finding this issue. - -New in v0.16.0 --------------- - -Bugfixes: - -* `pin_mask()`, `pin()` and `is_pinned()` make more sense when already - in check. Thanks to Ferdinand Mosca. - -New features: - -* **Variant support: Suicide, Giveaway, Atomic, King of the Hill, Racing Kings, - Horde, Three-check, Crazyhouse.** `chess.Move` now supports drops. -* More fine grained dependencies. Use *pip install python-chess[uci,gaviota]* to - install dependencies for the full feature set. -* Added `chess.STATUS_EMPTY` and `chess.STATUS_ILLEGAL_CHECK`. -* The `board.promoted` mask keeps track of promoted pieces. -* Optionally copy boards without the move stack: `board.copy(stack=False)`. -* `examples/bratko_kopec` now supports avoid move (am), variants and - displays fractional scores immidiately. Thanks to Daniel Dugovic. -* `perft.py` rewritten with multi-threading support and moved to - `examples/perft`. -* `chess.syzygy.dependencies()`, `chess.syzygy.all_dependencies()` to generate - Syzygy tablebase dependencies. - -Changes: - -* **Endgame tablebase probing (Syzygy, Gaviota):** `probe_wdl()` **,** - `probe_dtz()` **and** `probe_dtm()` **now raise** `KeyError` **or** - `MissingTableError` **instead of returning** *None*. If you prefer getting - `None` in case of an error use `get_wdl()`, `get_dtz()` and `get_dtm()`. -* `chess.pgn.BaseVisitor.result()` returns `True` by default and is no longer - used by `chess.pgn.read_game()` if no game was found. -* Non-fast-forward update of the Git repository to reduce size (old binary - test assets removed). -* `board.pop()` now uses a boardstate stack to undo moves. -* `uci.engine.position()` will send the move history only until the latest - zeroing move. -* Optimize `board.clean_castling_rights()` and micro-optimizations improving - PGN parser performance by around 20%. -* Syzygy tables now directly use the endgame name as hash keys. -* Improve test performance (especially on Travis CI). -* Documentation updates and improvements. - -New in v0.15.4 --------------- - -New features: - -* Highlight last move and checks when rendering board SVGs. - -New in v0.15.3 --------------- - -Bugfixes: - -* `pgn.Game.errors` was not populated as documented. Thanks to Ryan Delaney - for reporting. - -New features: - -* Added `pgn.GameNode.add_line()` and `pgn.GameNode.main_line()` which make - it easier to work with lists of moves as variations. - -New in v0.15.2 --------------- - -Bugfixes: - -* Fix a bug where `shift_right()` and `shift_2_right()` were producing - integers larger than 64bit when shifting squares off the board. This is - very similar to the bug fixed in v0.15.1. Thanks to piccoloprogrammatore - for reporting. - -New in v0.15.1 --------------- - -Bugfixes: - -* Fix a bug where `shift_up_right()` and `shift_up_left()` were producing - integers larger than 64bit when shifting squares off the board. - -New features: - -* Replaced __html__ with experimental SVG rendering for IPython. - -New in v0.15.0 --------------- - -Changes: - -* `chess.uci.Score` **no longer has** `upperbound` **and** `lowerbound` - **attributes**. Previously these were always *False*. - -* Significant improvements of move generation speed, around **2.3x faster - PGN parsing**. Removed the following internal attributes and methods of - the `Board` class: `attacks_valid`, `attacks_to`, `attacks_from`, - `_pinned()`, `attacks_valid_stack`, `attacks_from_stack`, `attacks_to_stack`, - `generate_attacks()`. - -* UCI: Do not send *isready* directly after *go*. Though allowed by the UCI - protocol specification it is just not nescessary and many engines were having - trouble with this. - -* Polyglot: Use less memory for uniform random choices from big opening books - (reservoir sampling). - -* Documentation improvements. - -Bugfixes: - -* Allow underscores in PGN header tags. Found and fixed by Bajusz Tamás. - -New features: - -* Added `Board.chess960_pos()` to identify the Chess960 starting position - number of positions. - -* Added `chess.BB_BACKRANKS` and `chess.BB_PAWN_ATTACKS`. - -New in v0.14.1 --------------- - -Bugfixes: - -* Backport Bugfix for Syzygy DTZ related to en passant. - See official-stockfish/Stockfish@6e2ca97d93812b2. - -Changes: - -* Added optional argument *max_fds=128* to `chess.syzygy.open_tablebases()`. - An LRU cache is used to keep at most *max_fds* files open. This allows using - many tables without running out of file descriptors. - Previously all tables were opened at once. - -* Syzygy and Gaviota now store absolute tablebase paths, in case you change - the working directory of the process. - -* The default implementation of `chess.uci.InfoHandler.score()` will no longer - store score bounds in `info["score"]`, only real scores. - -* Added `Board.set_chess960_pos()`. - -* Documentation improvements. - -New in v0.14.0 --------------- - -Changes: - -* `Board.attacker_mask()` **has been renamed to** `Board.attackers_mask()` for - consistency. - -* **The signature of** `Board.generate_legal_moves()` **and** - `Board.generate_pseudo_legal_moves()` **has been changed.** Previously it - was possible to select piece types for selective move generation: - - `Board.generate_legal_moves(castling=True, pawns=True, knights=True, bishops=True, rooks=True, queens=True, king=True)` - - Now it is possible to select arbitrary sets of origin and target squares. - `to_mask` uses the corresponding rook squares for castling moves. - - `Board.generate_legal_moves(from_mask=BB_ALL, to_mask=BB)` - - To generate all knight and queen moves do: - - `board.generate_legal_moves(board.knights | board.queens)` - - To generate only castling moves use: - - `Board.generate_castling_moves(from_mask=BB_ALL, to_mask=BB_ALL)` - -* Additional hardening has been added on top of the bugfix from v0.13.3. - Diagonal skewers on the last double pawn move are now handled correctly, - even though such positions can not be reached with a sequence of legal moves. - -* `chess.syzygy` now uses the more efficient selective move generation. - -New features: - -* The following move generation methods have been added: - `Board.generate_pseudo_legal_ep(from_mask=BB_ALL, to_mask=BB_ALL)`, - `Board.generate_legal_ep(from_mask=BB_ALL, to_mask=BB_ALL)`, - `Board.generate_pseudo_legal_captures(from_mask=BB_ALL, to_mask=BB_ALL)`, - `Board.generate_legal_captures(from_mask=BB_ALL, to_mask=BB_ALL)`. - - -New in v0.13.3 --------------- - -**This is a bugfix release for a move generation bug.** Other than the bugfix -itself there are only minimal fully backwardscompatible changes. -You should update immediately. - -Bugfixes: - -* When capturing en passant, both the capturer and the captured pawn disappear - from the fourth or fifth rank. If those pawns were covering a horizontal - attack on the king, then capturing en passant should not have been legal. - - `Board.generate_legal_moves()` and `Board.is_into_check()` have been fixed. - - The same principle applies for diagonal skewers, but nothing has been done - in this release: If the last double pawn move covers a diagonal attack, then - the king would have already been in check. - - v0.14.0 adds additional hardening for all cases. It is recommended you - upgrade to v0.14.0 as soon as you can deal with the - non-backwards compatible changes. - -Changes: - -* `chess.uci` now uses `subprocess32` if applicable (and available). - Additionally a lock is used to work around a race condition in Python 2, that - can occur when spawning engines from multiple threads at the same time. - -* Consistently handle tabs in UCI engine output. - -New in v0.13.2 --------------- - -Changes: - -* `chess.syzygy.open_tablebases()` now raises if the given directory - does not exist. - -* Allow visitors to handle invalid `FEN` tags in PGNs. - -* Gaviota tablebase probing fails faster for piece counts > 5. - -Minor new features: - -* Added `chess.pgn.Game.from_board()`. - -New in v0.13.1 --------------- - -Changes: - -* Missing *SetUp* tags in PGNs are ignored. - -* Incompatible comparisons on `chess.Piece`, `chess.Move`, `chess.Board` - and `chess.SquareSet` now return *NotImplemented* instead of *False*. - -Minor new features: - -* Factored out basic board operations to `chess.BaseBoard`. This is inherited - by `chess.Board` and extended with the usual move generation features. - -* Added optional *claim_draw* argument to `chess.Base.is_game_over()`. - -* Added `chess.Board.result(claim_draw=False)`. - -* Allow `chess.Board.set_piece_at(square, None)`. - -* Added `chess.SquareSet.from_square(square)`. - -New in v0.13.0 --------------- - -* `chess.pgn.Game.export()` and `chess.pgn.GameNode.export()` have been - removed and replaced with a new visitor concept. - -* `chess.pgn.read_game()` no longer takes an `error_handler` argument. Errors - are now logged. Use the new visitor concept to change this behaviour. - -New in v0.12.5 --------------- - -Bugfixes: - -* Context manager support for pure Python Gaviota probing code. Various - documentation fixes for Gaviota probing. Thanks to Jürgen Précour for - reporting. - -* PGN variation start comments for variations on the very first move were - assigned to the game. Thanks to Norbert Räcke for reporting. - -New in v0.12.4 --------------- - -Bugfixes: - -* Another en passant related Bugfix for pure Python Gaviota tablebase probing. - -New features: - -* Added `pgn.GameNode.is_end()`. - -Changes: - -* Big speedup for `pgn` module. Boards are cached less agressively. Board - move stacks are copied faster. - -* Added tox.ini to specify test suite and flake8 options. - -New in v0.12.3 --------------- - -Bugfixes: - -* Some invalid castling rights were silently ignored by `Board.set_fen()`. Now - it is ensured information is stored for retrieval using `Board.status()`. - -New in v0.12.2 --------------- - -Bugfixes: - -* Some Gaviota probe results were incorrect for positions where black could - capture en passant. - -New in v0.12.1 --------------- - -Changes: - -* Robust handling of invalid castling rights. You can also use the new - method `Board.clean_castling_rights()` to get the subset of strictly valid - castling rights. - -New in v0.12.0 --------------- - -New features: - -* Python 2.6 support. Patch by vdbergh. - -* Pure Python Gaviota tablebase probing. Thanks to Jean-Noël Avila. - -New in v0.11.1 --------------- - -Bugfixes: - -* `syzygy.Tablebases.probe_dtz()` has was giving wrong results for some - positions with possible en passant capturing. This was found and fixed - upstream: https://github.com/official-stockfish/Stockfish/issues/394. - -* Ignore extra spaces in UCI `info` lines, as for example sent by the - Hakkapeliitta engine. Thanks to Jürgen Précour for reporting. - -New in v0.11.0 --------------- - -Changes: - -* **Chess960** support and the **representation of castling moves** has been - changed. - - The constructor of board has a new `chess960` argument, defaulting to - `False`: `Board(fen=STARTING_FEN, chess960=False)`. That property is - available as `Board.chess960`. - - In Chess960 mode the behaviour is as in the previous release. Castling moves - are represented as a king move to the corresponding rook square. - - In the default standard chess mode castling moves are represented with - the standard UCI notation, e.g. `e1g1` for king-side castling. - - `Board.uci(move, chess960=None)` creates UCI representations for moves. - Unlike `Move.uci()` it can convert them in the context of the current - position. - - `Board.has_chess960_castling_rights()` has been added to test for castling - rights that are impossible in standard chess. - - The modules `chess.polyglot`, `chess.pgn` and `chess.uci` will transparently - handle both modes. - -* In a previous release `Board.fen()` has been changed to only display an - en passant square if a legal en passant move is indeed possible. This has - now also been adapted for `Board.shredder_fen()` and `Board.epd()`. - -New features: - -* Get individual FEN components: `Board.board_fen()`, `Board.castling_xfen()`, - `Board.castling_shredder_fen()`. - -* Use `Board.has_legal_en_passant()` to test if a position has a legal - en passant move. - -* Make `repr(board.legal_moves)` human readable. - -New in v0.10.1 --------------- - -Bugfixes: - -* Fix use-after-free in Gaviota tablebase initialization. - -New in v0.10.0 --------------- - -New dependencies: - -* If you are using Python < 3.2 you have to install `futures` in order to - use the `chess.uci` module. - -Changes: - -* There are big changes in the UCI module. Most notably in async mode multiple - commands can be executed at the same time (e.g. `go infinite` and then - `stop` or `go ponder` and then `ponderhit`). - - `go infinite` and `go ponder` will now wait for a result, i.e. you may have - to call `stop` or `ponderhit` from a different thread or run the commands - asynchronously. - - `stop` and `ponderhit` no longer have a result. - -* The values of the color constants `chess.WHITE` and `chess.BLACK` have been - changed. Previously `WHITE` was `0`, `BLACK` was `1`. Now `WHITE` is `True`, - `BLACK` is `False`. The recommended way to invert `color` is using - `not color`. - -* The pseudo piece type `chess.NONE` has been removed in favor of just using - `None`. - -* Changed the `Board(fen)` constructor. If the optional `fen` argument is not - given behavior did not change. However if `None` is passed explicitly an - empty board is created. Previously the starting position would have been - set up. - -* `Board.fen()` will now only show completely legal en passant squares. - -* `Board.set_piece_at()` and `Board.remove_piece_at()` will now clear the - move stack, because the old moves may not be valid in the changed position. - -* `Board.parse_uci()` and `Board.push_uci()` will now accept null moves. - -* Changed shebangs from `#!/usr/bin/python` to `#!/usr/bin/env python` for - better virtualenv support. - -* Removed unused game data files from repository. - -Bugfixes: - -* PGN: Prefer the game result from the game termination marker over `*` in the - header. These should be identical in standard compliant PGNs. Thanks to - Skyler Dawson for reporting this. - -* Polyglot: `minimum_weight` for `find()`, `find_all()` and `choice()` was - not respected. - -* Polyglot: Negative indexing of opening books was raising `IndexError`. - -* Various documentation fixes and improvements. - -New features: - -* Experimental probing of Gaviota tablebases via libgtb. - -* New methods to construct boards: - - .. code:: python - - >>> chess.Board.empty() - Board('8/8/8/8/8/8/8/8 w - - 0 1') - - >>> board, ops = chess.Board.from_epd("4k3/8/8/8/8/8/8/4K3 b - - fmvn 17; hmvc 13") - >>> board - Board('4k3/8/8/8/8/8/8/4K3 b - - 13 17') - >>> ops - {'fmvn': 17, 'hmvc': 13} - -* Added `Board.copy()` and hooks to let the copy module to the right thing. - -* Added `Board.has_castling_rights(color)`, - `Board.has_kingside_castling_rights(color)` and - `Board.has_queenside_castling_rights(color)`. - -* Added `Board.clear_stack()`. - -* Support common set operations on `chess.SquareSet()`. - -New in v0.9.1 -------------- - -Bugfixes: - -* UCI module could not handle castling ponder moves. Thanks to Marco Belli for - reporting. -* The initial move number in PGNs was missing, if black was to move in the - starting position. Thanks to Jürgen Précour for reporting. -* Detect more impossible en passant squares in `Board.status()`. There already - was a requirement for a pawn on the fifth rank. Now the sixth and seventh - rank must be empty, additionally. We do not do further retrograde analysis, - because these are the only cases affecting move generation. - -New in v0.8.3 -------------- - -Bugfixes: - -* The initial move number in PGNs was missing, if black was to move in the - starting position. Thanks to Jürgen Précour for reporting. -* Detect more impossible en passant squares in `Board.status()`. There already - was a requirement for a pawn on the fifth rank. Now the sixth and seventh - rank must be empty, additionally. We do not do further retrograde analysis, - because these are the only cases affecting move generation. - -New in v0.9.0 -------------- - -**This is a big update with quite a few breaking changes. Carefully review -the changes before upgrading. It's no problem if you can not update right now. -The 0.8.x branch still gets bugfixes.** - -Incompatible changes: - -* Removed castling right constants. Castling rights are now represented as a - bitmask of the rook square. For example: - - .. code:: python - - >>> board = chess.Board() - - >>> # Standard castling rights. - >>> board.castling_rights == chess.BB_A1 | chess.BB_H1 | chess.BB_A8 | chess.BB_H8 - True - - >>> # Check for the presence of a specific castling right. - >>> can_white_castle_queenside = chess.BB_A1 & board.castling_rights - - Castling moves were previously encoded as the corresponding king movement in - UCI, e.g. `e1f1` for white kingside castling. **Now castling moves are - encoded as a move to the corresponding rook square** (`UCI_Chess960`-style), - e.g. `e1a1`. - - You may use the new methods `Board.uci(move, chess960=True)`, - `Board.parse_uci(uci)` and `Board.push_uci(uci)` to handle this - transparently. - - The `uci` module takes care of converting moves when communicating with an - engine that is not in `UCI_Chess960` mode. - -* The `get_entries_for_position(board)` method of polyglot opening book readers - has been changed to `find_all(board, minimum_weight=1)`. By default entries - with weight 0 are excluded. - -* The `Board.pieces` lookup list has been removed. - -* In 0.8.1 the spelling of repetition (was repitition) was fixed. - `can_claim_threefold_repetition()` and `is_fivefold_repetition()` are the - affected method names. Aliases are now removed. - -* `Board.set_epd()` will now interpret `bm`, `am` as a list of moves for the - current position and `pv` as a variation (represented by a list of moves). - Thanks to Jordan Bray for reporting this. - -* Removed `uci.InfoHandler.pre_bestmove()` and - `uci.InfoHandler.post_bestmove()`. - -* `uci.InfoHandler().info["score"]` is now relative to multipv. Use - - .. code:: python - - >>> with info_handler as info: - ... if 1 in info["score"]: - ... cp = info["score"][1].cp - - where you were previously using - - .. code:: python - - >>> with info_handler as info: - ... if "score" in info: - ... cp = info["score"].cp - -* Clear `uci.InfoHandler()` dictionary at the start of new searches - (new `on_go()`), not at the end of searches. - -* Renamed `PseudoLegalMoveGenerator.bitboard` and `LegalMoveGenerator.bitboard` - to `PseudoLegalMoveGenerator.board` and `LegalMoveGenerator.board`, - respectively. - -* Scripts removed. - -* Python 3.2 compatibility dropped. Use Python 3.3 or higher. Python 2.7 - support is not affected. - -New features: - -* **Introduced Chess960 support.** `Board(fen)` and `Board.set_fen(fen)` now - support X-FENs. Added `Board.shredder_fen()`. - `Board.status(allow_chess960=True)` has an optional argument allowing to - insist on standard chess castling rules. - Added `Board.is_valid(allow_chess960=True)`. - -* **Improved move generation using** `Shatranj-style direct lookup - `_. **Removed rotated bitboards. Perft - speed has been more than doubled.** - -* Added `choice(board)` and `weighted_choice(board)` for polyglot opening book - readers. - -* Added `Board.attacks(square)` to determine attacks *from* a given square. - There already was `Board.attackers(color, square)` returning attacks *to* - a square. - -* Added `Board.is_en_passant(move)`, `Board.is_capture(move)` and - `Board.is_castling(move)`. - -* Added `Board.pin(color, square)` and `Board.is_pinned(color, square)`. - -* There is a new method `Board.pieces(piece_type, color)` to get a set of - squares with the specified pieces. - -* Do expensive Syzygy table initialization on demand. - -* Allow promotions like `e8Q` (usually `e8=Q`) in `Board.parse_san()` and - PGN files. - -* Patch by Richard C. Gerkin: Added `Board.__unicode__()` just like - `Board.__str__()` but with unicode pieces. -* Patch by Richard C. Gerkin: Added `Board.__html__()`. - -New in v0.8.2 -------------- - -Bugfixes: - -* `pgn.Game.setup()` with the standard starting position was failing when the - standard starting position was already set. Thanks to Jordan Bray for - reporting this. - -Optimizations: - -* Remove `bswap()` from Syzygy decompression hot path. Directly read integers - with the correct endianness. - -New in v0.8.1 -------------- - -* Fixed pondering mode in uci module. For example `ponderhit()` was blocking - indefinitely. Thanks to Valeriy Huz for reporting this. - -* Patch by Richard C. Gerkin: Moved searchmoves to the end of the UCI go - command, where it will not cause other command parameters to be ignored. - -* Added missing check or checkmate suffix to castling SANs, e.g. `O-O-O#`. - -* Fixed off-by-one error in polyglot opening book binary search. This would - not have caused problems for real opening books. - -* Fixed Python 3 support for reverse polyglot opening book iteration. - -* Bestmoves may be literally `(none)` in UCI protocol, for example in - checkmate positions. Fix parser and return `None` as the bestmove in this - case. - -* Fixed spelling of repetition (was repitition). - `can_claim_threefold_repetition()` and `is_fivefold_repetition()` are the - affected method names. Aliases are there for now, but will be removed in the - next release. Thanks to Jimmy Patrick for reporting this. - -* Added `SquareSet.__reversed__()`. - -* Use containerized tests on Travis CI, test against Stockfish 6, improved - test coverage amd various minor clean-ups. - -New in v0.8.0 -------------- - -* **Implement Syzygy endgame tablebase probing.** - `https://syzygy-tables.info `_ - is an example project that provides a public API using the new features. - -* The interface for aynchronous UCI command has changed to mimic - `concurrent.futures`. `is_done()` is now just `done()`. Callbacks will - receive the command object as a single argument instead of the result. - The `result` property and `wait()` have been removed in favor of a - synchronously waiting `result()` method. - -* The result of the `stop` and `go` UCI commands are now named tuples (instead - of just normal tuples). - -* Add alias `Board` for `Bitboard`. - -* Fixed race condition during UCI engine startup. Lines received during engine - startup sometimes needed to be processed before the Engine object was fully - initialized. - -New in v0.7.0 -------------- - -* **Implement UCI engine communication.** - -* Patch by Matthew Lai: `Add caching for gameNode.board()`. - -New in v0.6.0 -------------- - -* If there are comments in a game before the first move, these are now assigned - to `Game.comment` instead of `Game.starting_comment`. `Game.starting_comment` - is ignored from now on. `Game.starts_variation()` is no longer true. - The first child node of a game can no longer have a starting comment. - It is possible to have a game with `Game.comment` set, that is otherwise - completely empty. - -* Fix export of games with variations. Previously the moves were exported in - an unusual (i.e. wrong) order. - -* Install `gmpy2` or `gmpy` if you want to use slightly faster binary - operations. - -* Ignore superfluous variation opening brackets in PGN files. - -* Add `GameNode.san()`. - -* Remove `sparse_pop_count()`. Just use `pop_count()`. - -* Remove `next_bit()`. Now use `bit_scan()`. - -New in v0.5.0 -------------- - -* PGN parsing is now more robust: `read_game()` ignores invalid tokens. - Still exceptions are going to be thrown on illegal or ambiguous moves, but - this behaviour can be changed by passing an `error_handler` argument. - - .. code:: python - - >>> # Raises ValueError: - >>> game = chess.pgn.read_game(file_with_illegal_moves) - - .. code:: python - - >>> # Silently ignores errors and continues parsing: - >>> game = chess.pgn.read_game(file_with_illegal_moves, None) - - .. code:: python - - >>> # Logs the error, continues parsing: - >>> game = chess.pgn.read_game(file_with_illegal_moves, logger.exception) - - If there are too many closing brackets this is now ignored. - - Castling moves like 0-0 (with zeros) are now accepted in PGNs. - The `Bitboard.parse_san()` method remains strict as always, though. - - Previously the parser was strictly following the PGN spefification in that - empty lines terminate a game. So a game like - - :: - - [Event "?"] - - { Starting comment block } - - 1. e4 e5 2. Nf3 Nf6 * - - would have ended directly after the starting comment. To avoid this, the - parser will now look ahead until it finds at least one move or a termination - marker like `*`, `1-0`, `1/2-1/2` or `0-1`. - -* Introduce a new function `scan_headers()` to quickly scan a PGN file for - headers without having to parse the full games. - -* Minor testcoverage improvements. - -New in v0.4.2 -------------- - -* Fix bug where `pawn_moves_from()` and consequently `is_legal()` weren't - handling en passant correctly. Thanks to Norbert Naskov for reporting. - -New in v0.4.1 -------------- - -* Fix `is_fivefold_repitition()`: The new fivefold repetition rule requires - the repetitions to occur on *alternating consecutive* moves. - -* Minor testing related improvements: Close PGN files, allow running via - setuptools. - -* Add recently introduced features to README. - -New in v0.4.0 -------------- - -* Introduce `can_claim_draw()`, `can_claim_fifty_moves()` and - `can_claim_threefold_repitition()`. - -* Since the first of July 2014 a game is also over (even without claim by one - of the players) if there were 75 moves without a pawn move or capture or - a fivefold repetition. Let `is_game_over()` respect that. Introduce - `is_seventyfive_moves()` and `is_fivefold_repitition()`. Other means of - ending a game take precedence. - -* Threefold repetition checking requires efficient hashing of positions - to build the table. So performance improvements were needed there. The - default polyglot compatible zobrist hashes are now built incrementally. - -* Fix low level rotation operations `l90()`, `l45()` and `r45()`. There was - no problem in core because correct versions of the functions were inlined. - -* Fix equality and inequality operators for `Bitboard`, `Move` and `Piece`. - Also make them robust against comparisons with incompatible types. - -* Provide equality and inequality operators for `SquareSet` and - `polyglot.Entry`. - -* Fix return values of incremental arithmetical operations for `SquareSet`. - -* Make `polyglot.Entry` a `collections.namedtuple`. - -* Determine and improve test coverage. - -* Minor coding style fixes. - -New in v0.3.1 -------------- - -* `Bitboard.status()` now correctly detects `STATUS_INVALID_EP_SQUARE`, - instead of errors or false reports. - -* Polyglot opening book reader now correctly handles knight underpromotions. - -* Minor coding style fixes, including removal of unused imports. - -New in v0.3.0 -------------- - -* Rename property `half_moves` of `Bitboard` to `halfmove_clock`. - -* Rename property `ply` of `Bitboard` to `fullmove_number`. - -* Let PGN parser handle symbols like `!`, `?`, `!?` and so on by converting - them to NAGs. - -* Add a human readable string representation for Bitboards. - - .. code:: python - - >>> print(chess.Bitboard()) - r n b q k b n r - p p p p p p p p - . . . . . . . . - . . . . . . . . - . . . . . . . . - . . . . . . . . - P P P P P P P P - R N B Q K B N R - -* Various documentation improvements. - -New in v0.2.0 -------------- - -* **Implement PGN parsing and writing.** -* Hugely improve test coverage and use Travis CI for continuous integration and - testing. -* Create an API documentation. -* Improve Polyglot opening-book handling. - -New in v0.1.0 -------------- - -Apply the lessons learned from the previous releases, redesign the API and -implement it in pure Python. - -New in v0.0.4 -------------- - -Implement the basics in C++ and provide bindings for Python. Obviously -performance was a lot better - but at the expense of having to compile -code for the target platform. - -Pre v0.0.4 ----------- - -First experiments with a way too slow pure Python API, creating way too many -objects for basic operations. +See ``CHANGELOG-OLD.rst`` for changes up to v1.0.0. From 43336b48ad95d103152774f76cd71fe18dfd80f1 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 17:23:04 +0200 Subject: [PATCH 048/613] Update tox.ini --- tox.ini | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tox.ini b/tox.ini index eb79e3ce3..559f81ecc 100644 --- a/tox.ini +++ b/tox.ini @@ -1,5 +1,5 @@ [tox] -envlist = py36,py37,py38,pypy3 +envlist = py37,py38,py39 [testenv] passenv = LD_LIBRARY_PATH From 205f10ae1b6fe7ba9444822faedbf1bad98f9e84 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 17:30:37 +0200 Subject: [PATCH 049/613] Try Python 3.9-dev on Travis CI (#671) --- .travis.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/.travis.yml b/.travis.yml index d63d22051..dcbbd2399 100644 --- a/.travis.yml +++ b/.travis.yml @@ -5,7 +5,7 @@ matrix: include: - python: "3.7" - python: "3.8" - - python: "3.9" + - python: "3.9-dev" env: LATEST=1 cache: directories: From 89357e0f536bbff218cd129232cfab164fc1473a Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 17:37:23 +0200 Subject: [PATCH 050/613] Run mypy also on Python 3.8 CI --- .travis.yml | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) diff --git a/.travis.yml b/.travis.yml index dcbbd2399..2e4ae2233 100644 --- a/.travis.yml +++ b/.travis.yml @@ -5,8 +5,12 @@ matrix: include: - python: "3.7" - python: "3.8" + env: + - RUN_MYPY=1 - python: "3.9-dev" - env: LATEST=1 + env: + - RUN_MYPY=1 + - RUN_PERFT=1 cache: directories: - data/gaviota @@ -47,7 +51,7 @@ install: - pip install --upgrade pip wheel - pip install --upgrade setuptools - pip install --upgrade coveralls - - if [[ $LATEST -eq 1 ]]; then pip install --upgrade mypy; fi + - if [[ $RUN_MYPY -eq 1 ]]; then pip install --upgrade mypy; fi - pip install -e . script: - # Unit tests @@ -77,13 +81,13 @@ script: - echo Unit tests complete - coveralls || [[ $? -eq 139 ]] - # Typing - - if [[ $LATEST -eq 1 ]]; then python -m mypy --strict chess; fi - - if [[ $LATEST -eq 1 ]]; then python -m mypy --strict examples/**/*.py; fi + - if [[ $RUN_MYPY -eq 1 ]]; then python -m mypy --strict chess; fi + - if [[ $RUN_MYPY -eq 1 ]]; then python -m mypy --strict examples/**/*.py; fi - # Perft tests - - if [[ $LATEST -eq 1 ]]; then python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000; fi - - if [[ $LATEST -eq 1 ]]; then python examples/perft/perft.py -t 1 examples/perft/tricky.perft; fi - - if [[ $LATEST -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant giveaway examples/perft/giveaway.perft; fi - - if [[ $LATEST -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant atomic examples/perft/atomic.perft; fi - - if [[ $LATEST -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant racingkings examples/perft/racingkings.perft; fi - - if [[ $LATEST -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant horde examples/perft/horde.perft; fi - - if [[ $LATEST -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant crazyhouse examples/perft/crazyhouse.perft; fi + - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000; fi + - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 examples/perft/tricky.perft; fi + - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant giveaway examples/perft/giveaway.perft; fi + - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant atomic examples/perft/atomic.perft; fi + - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant racingkings examples/perft/racingkings.perft; fi + - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant horde examples/perft/horde.perft; fi + - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant crazyhouse examples/perft/crazyhouse.perft; fi From 85e0a4c76acb4fa58ed398822315656aa297e222 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 20:00:03 +0200 Subject: [PATCH 051/613] Add PovWdl and Wdl --- chess/engine.py | 102 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) diff --git a/chess/engine.py b/chess/engine.py index 6ec175438..ec4c96bad 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -598,6 +598,108 @@ def __str__(self) -> str: MateGiven = MateGivenType() +class PovWdl: + """ + Relative :class:`win/draw/loss statistics ` and the point + of view. + """ + + def __init__(self, relative: Wdl, turn: Color) -> None: + self.relative = relative + self.turn = turn + + def white(self) -> Wdl: + """Gets the :class:`~chess.engine.Wdl` from White's point of view.""" + return self.pov(chess.WHITE) + + def black(self) -> Wdl: + """Gets the :class:`~chess.engine.Wdl` from Black's point of view.""" + return self.pov(chess.BLACK) + + def pov(self, color: Color) -> Wdl: + """ + Gets the :class:`~chess.engine.Wdl` from the point of view of the given + *color*. + """ + return self.relative if self.turn == color else -self.relative + + def __repr__(self) -> str: + return "PovWdl({!r}, {})".format(self.wdl, "WHITE" if self.turn else "BLACK") + + # Unfortunately in python-chess v1.1.0, info["wdl"] was a simple tuple + # of the relative permille values, so we have to support __iter__, + # __len__, __getitem__ and equality comparisons with other tuples. + # Nevermind ordering, because thats not a sensible operation anyway. + + def __iter__(self): + yield self.relative.wins + yield self.relative.draws + yield self.relative.losses + + def __len__(self): + return 3 + + def __getitem__(self, idx): + return (self.relative.wins, self.relative.draws, self.relative.losses)[idx] + + def __eq__(self) -> bool: + if isinstance(other, PovWdl): + return self.white() == other.white() + elif isinstance(other, tuple): + return (self.relative.wins, self.relative.draws, self.relative.losses) == other + else: + return NotImplemented + + +@dataclasses.dataclass +class Wdl: + wins: int + draws: int + losses: int + + def total(self) -> int: + """ + Returns the total number of games. Usually ``wdl`` reported by engines + is scaled to 1000 games. + """ + self.wins + self.draws + self.losses + + def winning_chance(self) -> float: + """Returns the relative frequency of wins.""" + return self.wins / self.total() + + def drawing_chance(self) -> float: + """Returns the relative frequency of draws.""" + return self.draws / self.total() + + def losing_chance(self) -> float: + """Returns the relative frequency of losses.""" + return self.losses / self.total() + + def expectation(self) -> float: + """ + Returns the expectation value, where a win is valued 1, a draw is + valued 0.5, and a loss is valued 0. + """ + return (self.wins + 0.5 * self.draws) / self.total() + + def __iter__(self): + yield self.wins + yield self.draws + yield self.losses + + def __reversed__(self): + yield self.losses + yield self.draws + yield self.wins + + def __pos__(self) -> Wdl: + return self + + def __neg__(self) -> Wdl: + return Wdl(self.losses, self.draws, self.wins) + + class MockTransport(asyncio.SubprocessTransport, asyncio.WriteTransport): def __init__(self, protocol: Protocol) -> None: super().__init__() From 1c0e36897e25bb7dbf263376ab3b1946475699de Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 21:27:06 +0200 Subject: [PATCH 052/613] Integrate Wdl with InfoDict --- chess/engine.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index ec4c96bad..e3b8b40cf 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -306,7 +306,7 @@ class InfoDict(typing.TypedDict, total=False): refutation: Dict[chess.Move, List[chess.Move]] currline: Dict[int, List[chess.Move]] ebf: float - wdl: Tuple[int, int, int] + wdl: PovWdl string: str except AttributeError: # Before Python 3.8. @@ -1566,7 +1566,7 @@ def _parse_uci_info(arg: str, root_board: chess.Board, selector: Info = INFO_ALL LOGGER.error("Exception parsing pv from info: %r, position at root: %s", arg, root_board.fen()) elif parameter == "wdl": try: - info["wdl"] = int(tokens.pop(0)), int(tokens.pop(0)), int(tokens.pop(0)) + info["wdl"] = PovWdl(Wdl(int(tokens.pop(0)), int(tokens.pop(0)), int(tokens.pop(0))), root_board.turn) except (ValueError, IndexError): LOGGER.error("Exception parsing wdl from info: %r", arg) From 5f5291e3f29eae6a4c80f4bf6ae925d57ba1cab7 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 21:58:53 +0200 Subject: [PATCH 053/613] Draft Score to Wdl conversion --- chess/engine.py | 57 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 56 insertions(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index e3b8b40cf..e5cf2533d 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -36,9 +36,17 @@ import chess +from chess import Color from types import TracebackType from typing import Any, Callable, Coroutine, Deque, Dict, Generator, Generic, Iterable, Iterator, List, Mapping, MutableMapping, Optional, Tuple, Type, TypeVar, Union -from chess import Color + +try: + from typing import Literal +except ImportError: + # Before Python 3.8. + _WdlModel = str +else: + _WdlModel = Literal["sf12"] # type: ignore T = TypeVar("T") @@ -377,6 +385,10 @@ def is_mate(self) -> bool: """Tests if this is a mate score.""" return self.relative.is_mate() + def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> PovWdl: + """See :func:`~chess.engine.Score.wdl()`.""" + return PovWdl(self.relative.wdl(), self.turn) + def __repr__(self) -> str: return "PovScore({!r}, {})".format(self.relative, "WHITE" if self.turn else "BLACK") @@ -449,6 +461,29 @@ def is_mate(self) -> bool: """Tests if this is a mate score.""" return self.mate() is not None + @abc.abstractmethod + def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: + """ + Returns statistics for the expected outcome of this game, based on + a *model*, given that this score is reached at *ply*. + + Scores have a total order, but it makes little sense to compute + the difference between two scores. For example, going from + ``Cp(-100)`` to ``Cp(+100)`` is much more significant than going + from ``Cp(800)`` to ``Cp(1000)``. It is better to compare the + expectation values for the outcome of the game (based on winning + chances and drawing chances). + + :param model: Currently the only implemented model is ``sf12``, the + win rate model used by Stockfish 12. + :param ply: The number of half-moves played since the starting + position. Models may scale scores slightly differently based on + this. Defaults to middle game. + + >>> Cp(100).wdl().expectation() - Cp(-100).wdl().expectation() + >>> Cp(1000).wdl().expectation() - Cp(800).wdl().expectation() + """ + @abc.abstractmethod def __neg__(self) -> Score: ... @@ -514,6 +549,20 @@ def mate(self) -> None: def score(self, *, mate_score: Optional[int] = None) -> int: return self.cp + def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: + wins = self._sf12_wins(ply=ply) + losses = (-self)._sf12_wins(ply=ply) + draws = 1000 - wins - losses + return Wdl(wins, draws, losses) + + def _sf12_wins(self, *, ply: int) -> int: + # https://github.com/official-stockfish/Stockfish/blob/sf_12/src/uci.cpp#L198-L218 + m = min(240, max(ply, 0)) / 64 + a = (((-8.24404295 * m + 64.23892342) * m + -95.73056462) * m) + 153.86478679 + b = (((-3.37154371 * m + 28.44489198) * m + -56.67657741) * m) + 72.05858751 + x = min(1000, max(self.cp, -1000)) + return int(0.5 + 1000 / (1 + math.exp((a - x) / b))) + def __str__(self) -> str: return f"+{self.cp:d}" if self.cp > 0 else str(self.cp) @@ -551,6 +600,9 @@ def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: else: return -mate_score - self.moves + def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: + return Wdl(1000, 0, 0) if self.moves > 0 else Wdl(0, 0, 1000) + def __str__(self) -> str: return f"#+{self.moves}" if self.moves > 0 else f"#-{abs(self.moves)}" @@ -580,6 +632,9 @@ def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: ... def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: return mate_score + def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: + return Wdl(1000, 0, 0) + def __neg__(self) -> Mate: return Mate(0) From 8fdd22d4833d051b98e17f550c26e696b2b81fe7 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 22:28:43 +0200 Subject: [PATCH 054/613] Wdl fixes and consistency checks --- chess/engine.py | 30 +++++++++++++++++------------- test.py | 13 +++++++++++++ 2 files changed, 30 insertions(+), 13 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index e5cf2533d..3a904699a 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -25,6 +25,7 @@ import dataclasses import enum import logging +import math import warnings import shlex import subprocess @@ -470,18 +471,21 @@ def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: Scores have a total order, but it makes little sense to compute the difference between two scores. For example, going from ``Cp(-100)`` to ``Cp(+100)`` is much more significant than going - from ``Cp(800)`` to ``Cp(1000)``. It is better to compare the - expectation values for the outcome of the game (based on winning + from ``Cp(+300)`` to ``Cp(+500)``. It is better to compute differences + of the expectation values for the outcome of the game (based on winning chances and drawing chances). + >>> Cp(100).wdl().expectation() - Cp(-100).wdl().expectation() # doctest: +ELLIPSIS + 0.379... + + >>> Cp(500).wdl().expectation() - Cp(300).wdl().expectation() # doctest: +ELLIPSIS + 0.015... + :param model: Currently the only implemented model is ``sf12``, the win rate model used by Stockfish 12. :param ply: The number of half-moves played since the starting position. Models may scale scores slightly differently based on this. Defaults to middle game. - - >>> Cp(100).wdl().expectation() - Cp(-100).wdl().expectation() - >>> Cp(1000).wdl().expectation() - Cp(800).wdl().expectation() """ @abc.abstractmethod @@ -679,25 +683,25 @@ def pov(self, color: Color) -> Wdl: return self.relative if self.turn == color else -self.relative def __repr__(self) -> str: - return "PovWdl({!r}, {})".format(self.wdl, "WHITE" if self.turn else "BLACK") + return "PovWdl({!r}, {})".format(self.relative, "WHITE" if self.turn else "BLACK") # Unfortunately in python-chess v1.1.0, info["wdl"] was a simple tuple # of the relative permille values, so we have to support __iter__, # __len__, __getitem__ and equality comparisons with other tuples. # Nevermind ordering, because thats not a sensible operation anyway. - def __iter__(self): + def __iter__(self) -> Iterator[int]: yield self.relative.wins yield self.relative.draws yield self.relative.losses - def __len__(self): + def __len__(self) -> int: return 3 - def __getitem__(self, idx): + def __getitem__(self, idx: int) -> int: return (self.relative.wins, self.relative.draws, self.relative.losses)[idx] - def __eq__(self) -> bool: + def __eq__(self, other: object) -> bool: if isinstance(other, PovWdl): return self.white() == other.white() elif isinstance(other, tuple): @@ -717,7 +721,7 @@ def total(self) -> int: Returns the total number of games. Usually ``wdl`` reported by engines is scaled to 1000 games. """ - self.wins + self.draws + self.losses + return self.wins + self.draws + self.losses def winning_chance(self) -> float: """Returns the relative frequency of wins.""" @@ -738,12 +742,12 @@ def expectation(self) -> float: """ return (self.wins + 0.5 * self.draws) / self.total() - def __iter__(self): + def __iter__(self) -> Iterator[int]: yield self.wins yield self.draws yield self.losses - def __reversed__(self): + def __reversed__(self) -> Iterator[int]: yield self.losses yield self.draws yield self.wins diff --git a/test.py b/test.py index 90cb67e89..b6c9df061 100755 --- a/test.py +++ b/test.py @@ -2796,6 +2796,10 @@ def test_score_ordering(self): self.assertEqual(i >= j, a >= b) self.assertEqual(i < j, a.score(mate_score=100000) < b.score(mate_score=100000)) + self.assertTrue(not (i < j) or a.wdl().expectation() <= b.wdl().expectation()) + self.assertTrue(not (i < j) or a.wdl().winning_chance() <= b.wdl().winning_chance()) + self.assertTrue(not (i < j) or a.wdl().losing_chance() >= b.wdl().losing_chance()) + def test_score(self): # Negation. self.assertEqual(-chess.engine.Cp(+20), chess.engine.Cp(-20)) @@ -2813,6 +2817,15 @@ def test_score(self): self.assertEqual(chess.engine.Cp(-300).mate(), None) self.assertEqual(chess.engine.Mate(+5).mate(), 5) + # Wdl. + self.assertEqual(chess.engine.MateGiven.wdl().expectation(), 1) + self.assertEqual(chess.engine.Mate(0).wdl().expectation(), 0) + self.assertEqual(chess.engine.Cp(0).wdl().expectation(), 0.5) + + for cp in map(chess.engine.Cp, range(-1050, 1100, 50)): + wdl = cp.wdl() + self.assertAlmostEqual(wdl.winning_chance() + wdl.drawing_chance() + wdl.losing_chance(), 1) + @catchAndSkip(FileNotFoundError, "need stockfish") def test_sf_forced_mates(self): with chess.engine.SimpleEngine.popen_uci("stockfish", debug=True) as engine: From 43afa7679b5495bf7510e78f0c015cd5a8981303 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 22:40:35 +0200 Subject: [PATCH 055/613] Document Wdl --- chess/engine.py | 17 +++++++++++++++-- docs/engine.rst | 6 ++++++ 2 files changed, 21 insertions(+), 2 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 3a904699a..5c8640f91 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -296,8 +296,8 @@ class InfoDict(typing.TypedDict, total=False): ``seldepth``, ``time`` (in seconds), ``nodes``, ``nps``, ``multipv``. Others: ``thits``, ``currmove``, ``currmovenumber``, ``hashfull``, - ``cpuload``, ``refutation``, ``currline``, ``ebf``, ``wdl``, and - ``string``. + ``cpuload``, ``refutation``, ``currline``, ``ebf``, + ``wdl`` (a :class:`~chess.engine.PovWdl`), and ``string``. """ score: PovScore pv: List[chess.Move] @@ -663,6 +663,12 @@ class PovWdl: of view. """ + relative: Wdl + """The relative :class:`~chess.engine.Wdl`.""" + + turn: Color + """The point of view (``chess.WHITE`` or ``chess.BLACK``).""" + def __init__(self, relative: Wdl, turn: Color) -> None: self.relative = relative self.turn = turn @@ -712,9 +718,16 @@ def __eq__(self, other: object) -> bool: @dataclasses.dataclass class Wdl: + """Win/draw/loss statistics.""" + wins: int + """The number of wins.""" + draws: int + """The number of draws.""" + losses: int + """The number of losses.""" def total(self) -> int: """ diff --git a/docs/engine.rst b/docs/engine.rst index ae2ad51d4..ab0e548ad 100644 --- a/docs/engine.rst +++ b/docs/engine.rst @@ -206,6 +206,12 @@ Example: .. autoclass:: chess.engine.Score :members: +.. autoclass:: chess.engine.PovWdl + :members: + +.. autoclass:: chess.engine.Wdl + :members: + Indefinite or infinite analysis ------------------------------- From 869abdaa528226eced14d81aa6ae9d38860c7e53 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 22:53:12 +0200 Subject: [PATCH 056/613] Implement Wdl.__bool__ --- chess/engine.py | 6 ++++++ test.py | 3 +++ 2 files changed, 9 insertions(+) diff --git a/chess/engine.py b/chess/engine.py index 5c8640f91..89d4f3f1d 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -688,6 +688,9 @@ def pov(self, color: Color) -> Wdl: """ return self.relative if self.turn == color else -self.relative + def __bool__(self) -> bool: + return bool(self.relative) + def __repr__(self) -> str: return "PovWdl({!r}, {})".format(self.relative, "WHITE" if self.turn else "BLACK") @@ -755,6 +758,9 @@ def expectation(self) -> float: """ return (self.wins + 0.5 * self.draws) / self.total() + def __bool__(self) -> bool: + return bool(self.total()) + def __iter__(self) -> Iterator[int]: yield self.wins yield self.draws diff --git a/test.py b/test.py index b6c9df061..9762a4fdc 100755 --- a/test.py +++ b/test.py @@ -2824,8 +2824,11 @@ def test_score(self): for cp in map(chess.engine.Cp, range(-1050, 1100, 50)): wdl = cp.wdl() + self.assertTrue(wdl) self.assertAlmostEqual(wdl.winning_chance() + wdl.drawing_chance() + wdl.losing_chance(), 1) + self.assertFalse(chess.engine.Wdl(0, 0, 0)) + @catchAndSkip(FileNotFoundError, "need stockfish") def test_sf_forced_mates(self): with chess.engine.SimpleEngine.popen_uci("stockfish", debug=True) as engine: From 82e503130aa5a6849cb3b847b470ca87e4a32284 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 23:13:45 +0200 Subject: [PATCH 057/613] Do not use try-else for Literal imports --- chess/__init__.py | 5 ++--- chess/engine.py | 5 ++--- chess/pgn.py | 5 ++--- 3 files changed, 6 insertions(+), 9 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index 63fd03464..a71e99de8 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -41,11 +41,10 @@ try: from typing import Literal + _EnPassantSpec = Literal["legal", "fen", "xfen"] except ImportError: # Before Python 3.8. - _EnPassantSpec = str -else: - _EnPassantSpec = Literal["legal", "fen", "xfen"] # type: ignore + _EnPassantSpec = str # type: ignore Color = bool diff --git a/chess/engine.py b/chess/engine.py index 89d4f3f1d..4af6b25b9 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -43,11 +43,10 @@ try: from typing import Literal + _WdlModel = Literal["sf12"] except ImportError: # Before Python 3.8. - _WdlModel = str -else: - _WdlModel = Literal["sf12"] # type: ignore + _WdlModel = str # type: ignore T = TypeVar("T") diff --git a/chess/pgn.py b/chess/pgn.py index 83cf73f82..a88099f70 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -33,11 +33,10 @@ try: from typing import Literal + _TrueLiteral = Literal[True] except ImportError: # Before Python 3.8. - _TrueLiteral = bool -else: - _TrueLiteral = Literal[True] # type: ignore + _TrueLiteral = bool # type: ignore LOGGER = logging.getLogger(__name__) From 069f0f03fbe6f84b743d5c170a9c3cbe4917c5c6 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 23:14:18 +0200 Subject: [PATCH 058/613] Fix typo: thits -> tbhits --- chess/engine.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index 4af6b25b9..f150bf387 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -294,7 +294,7 @@ class InfoDict(typing.TypedDict, total=False): ``pv`` (a list of :class:`~chess.Move` objects), ``depth``, ``seldepth``, ``time`` (in seconds), ``nodes``, ``nps``, ``multipv``. - Others: ``thits``, ``currmove``, ``currmovenumber``, ``hashfull``, + Others: ``tbhits``, ``currmove``, ``currmovenumber``, ``hashfull``, ``cpuload``, ``refutation``, ``currline``, ``ebf``, ``wdl`` (a :class:`~chess.engine.PovWdl`), and ``string``. """ From 1393e6efab59304fbbb8b8690e9e1444b1093933 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 23:14:57 +0200 Subject: [PATCH 059/613] Clarify info["multipv"] --- chess/engine.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index f150bf387..0f0e9431f 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -292,7 +292,8 @@ class InfoDict(typing.TypedDict, total=False): Commonly used keys are: ``score`` (a :class:`~chess.engine.PovScore`), ``pv`` (a list of :class:`~chess.Move` objects), ``depth``, - ``seldepth``, ``time`` (in seconds), ``nodes``, ``nps``, ``multipv``. + ``seldepth``, ``time`` (in seconds), ``nodes``, ``nps``, ``multipv`` + (``1`` for the mainline). Others: ``tbhits``, ``currmove``, ``currmovenumber``, ``hashfull``, ``cpuload``, ``refutation``, ``currline``, ``ebf``, From 9ab3a9ea5786c9af49390b0bd0c003c613764661 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 23:29:42 +0200 Subject: [PATCH 060/613] Port core py:attribute to field docs --- chess/__init__.py | 113 ++++++++++++++++++++++++++++++++++++++-- docs/core.rst | 129 ---------------------------------------------- 2 files changed, 108 insertions(+), 134 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index a71e99de8..59a0ad990 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -408,7 +408,10 @@ class Piece: """A piece with type and color.""" piece_type: PieceType + """The piece type.""" + color: Color + """The piece color.""" def symbol(self) -> str: """ @@ -458,9 +461,16 @@ class Move: """ from_square: Square + """The source square.""" + to_square: Square + """The target square.""" + promotion: Optional[PieceType] = None + """The promotion piece type or ``None``.""" + drop: Optional[PieceType] = None + """The drop piece type or ``None``.""" def uci(self) -> str: """ @@ -1398,17 +1408,110 @@ class Board(BaseBoard): pawnless_tbz_suffix: ClassVar[Optional[str]] = None pawnless_tbw_magic: ClassVar[Optional[bytes]] = None pawnless_tbz_magic: ClassVar[Optional[bytes]] = None - connected_kings = False - one_king = True - captures_compulsory = False + connected_kings: ClassVar[bool] = False + one_king: ClassVar[bool] = True + captures_compulsory: ClassVar[bool] = False + + turn: Color + """The side to move (``chess.WHITE`` or ``chess.BLACK``).""" + + castling_rights: Bitboard + """ + Bitmask of the rooks with castling rights. + + To test for specific squares: + + >>> import chess + >>> + >>> board = chess.Board() + >>> bool(board.castling_rights & chess.BB_H1) # White can castle with the h1 rook + True + + To add a specific square: + + >>> board.castling_rights |= chess.BB_A1 + + Use :func:`~chess.Board.set_castling_fen()` to set multiple castling + rights. Also see :func:`~chess.Board.has_castling_rights()`, + :func:`~chess.Board.has_kingside_castling_rights()`, + :func:`~chess.Board.has_queenside_castling_rights()`, + :func:`~chess.Board.has_chess960_castling_rights()`, + :func:`~chess.Board.clean_castling_rights()`. + """ + + ep_square: Optional[Square] + """ + The potential en passant square on the third or sixth rank or ``None``. + + Use :func:`~chess.Board.has_legal_en_passant()` to test if en passant + capturing would actually be possible on the next move. + """ + + fullmove_number: int + """ + Counts move pairs. Starts at `1` and is incremented after every move + of the black side. + """ + + halfmove_clock: int + """The number of half-moves since the last capture or pawn move.""" + + promoted: chess.Bitboard + """A bitmask of pieces that have been promoted.""" + + chess960: bool + """ + Whether the board is in Chess960 mode. In Chess960 castling moves are + represented as king moves to the corresponding rook square. + """ + + legal_moves: LegalMoveGenerator + """ + A dynamic list of legal moves. + + >>> import chess + >>> + >>> board = chess.Board() + >>> board.legal_moves.count() + 20 + >>> bool(board.legal_moves) + True + >>> move = chess.Move.from_uci("g1f3") + >>> move in board.legal_moves + True + + Wraps :func:`~chess.Board.generate_legal_moves()` and + :func:`~chess.Board.is_legal()`. + """ + + pseudo_legal_moves: PseudoLegalMoveGenerator + """ + A dynamic list of pseudo-legal moves, much like the legal move list. + + Pseudo-legal moves might leave or put the king in check, but are + otherwise valid. Null moves are not pseudo-legal. Castling moves are + only included if they are completely legal. + + Wraps :func:`~chess.Board.generate_pseudo_legal_moves()` and + :func:`~chess.Board.is_pseudo_legal()`. + """ + + move_stack: List[chess.Move] + """ + The move stack. Use :func:`Board.push() `, + :func:`Board.pop() `, + :func:`Board.peek() ` and + :func:`Board.clear_stack() ` for + manipulation. + """ def __init__(self: BoardT, fen: Optional[str] = STARTING_FEN, *, chess960: bool = False) -> None: BaseBoard.__init__(self, None) self.chess960 = chess960 - self.ep_square: Optional[Square] = None - self.move_stack: List[Move] = [] + self.ep_square = None + self.move_stack = [] self._stack: List[_BoardState[BoardT]] = [] if fen is None: diff --git a/docs/core.rst b/docs/core.rst index c82092d53..50d1011d1 100644 --- a/docs/core.rst +++ b/docs/core.rst @@ -93,42 +93,12 @@ Pieces .. autoclass:: chess.Piece :members: - .. py:attribute:: piece_type - :type: chess.PieceType - - The piece type. - - .. py:attribute:: color - :type: chess.Color - - The piece color. - Moves ----- .. autoclass:: chess.Move :members: - .. py:attribute:: from_square - :type: chess.Square - - The source square. - - .. py:attribute:: to_square - :type: chess.Square - - The target square. - - .. py:attribute:: promotion - :type: Optional[chess.PieceType] - - The promotion piece type or ``None``. - - .. py:attribute:: drop - :type: Optional[chess.PieceType] - - The drop piece type or ``None``. - Board ----- @@ -139,105 +109,6 @@ Board .. autoclass:: chess.Board :members: - .. py:attribute:: turn - :type: chess.Color - - The side to move (``chess.WHITE`` or ``chess.BLACK``). - - .. py:attribute:: castling_rights - :type: chess.Bitboard - - Bitmask of the rooks with castling rights. - - To test for specific squares: - - >>> import chess - >>> - >>> board = chess.Board() - >>> bool(board.castling_rights & chess.BB_H1) # White can castle with the h1 rook - True - - To add a specific square: - - >>> board.castling_rights |= chess.BB_A1 - - Use :func:`~chess.Board.set_castling_fen()` to set multiple castling - rights. Also see :func:`~chess.Board.has_castling_rights()`, - :func:`~chess.Board.has_kingside_castling_rights()`, - :func:`~chess.Board.has_queenside_castling_rights()`, - :func:`~chess.Board.has_chess960_castling_rights()`, - :func:`~chess.Board.clean_castling_rights()`. - - .. py:attribute:: ep_square - :type: Optional[chess.Square] - - The potential en passant square on the third or sixth rank or ``None``. - - Use :func:`~chess.Board.has_legal_en_passant()` to test if en passant - capturing would actually be possible on the next move. - - .. py:attribute:: fullmove_number - :type: int - - Counts move pairs. Starts at `1` and is incremented after every move - of the black side. - - .. py:attribute:: halfmove_clock - :type: int - - The number of half-moves since the last capture or pawn move. - - .. py:attribute:: promoted - :type: chess.Bitboard - - A bitmask of pieces that have been promoted. - - .. py:attribute:: chess960 - :type: bool - - Whether the board is in Chess960 mode. In Chess960 castling moves are - represented as king moves to the corresponding rook square. - - .. py:attribute:: legal_moves - :value: chess.LegalMoveGenerator(self) - - A dynamic list of legal moves. - - >>> import chess - >>> - >>> board = chess.Board() - >>> board.legal_moves.count() - 20 - >>> bool(board.legal_moves) - True - >>> move = chess.Move.from_uci("g1f3") - >>> move in board.legal_moves - True - - Wraps :func:`~chess.Board.generate_legal_moves()` and - :func:`~chess.Board.is_legal()`. - - .. py:attribute:: pseudo_legal_moves - :value: chess.PseudoLegalMoveGenerator(self) - - A dynamic list of pseudo-legal moves, much like the legal move list. - - Pseudo-legal moves might leave or put the king in check, but are - otherwise valid. Null moves are not pseudo-legal. Castling moves are - only included if they are completely legal. - - Wraps :func:`~chess.Board.generate_pseudo_legal_moves()` and - :func:`~chess.Board.is_pseudo_legal()`. - - .. py:attribute:: move_stack - :type: List[chess.Move] - - The move stack. Use :func:`Board.push() `, - :func:`Board.pop() `, - :func:`Board.peek() ` and - :func:`Board.clear_stack() ` for - manipulation. - .. autoclass:: chess.BaseBoard :members: From 778d5794f27ed7ad4cdccf9b3a8d5ec9956c8bfb Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 21 Oct 2020 23:32:27 +0200 Subject: [PATCH 061/613] Document properties directly --- chess/__init__.py | 67 ++++++++++++++++++++++------------------------- 1 file changed, 32 insertions(+), 35 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index 59a0ad990..b4aac23cf 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -1465,37 +1465,6 @@ class Board(BaseBoard): represented as king moves to the corresponding rook square. """ - legal_moves: LegalMoveGenerator - """ - A dynamic list of legal moves. - - >>> import chess - >>> - >>> board = chess.Board() - >>> board.legal_moves.count() - 20 - >>> bool(board.legal_moves) - True - >>> move = chess.Move.from_uci("g1f3") - >>> move in board.legal_moves - True - - Wraps :func:`~chess.Board.generate_legal_moves()` and - :func:`~chess.Board.is_legal()`. - """ - - pseudo_legal_moves: PseudoLegalMoveGenerator - """ - A dynamic list of pseudo-legal moves, much like the legal move list. - - Pseudo-legal moves might leave or put the king in check, but are - otherwise valid. Null moves are not pseudo-legal. Castling moves are - only included if they are completely legal. - - Wraps :func:`~chess.Board.generate_pseudo_legal_moves()` and - :func:`~chess.Board.is_pseudo_legal()`. - """ - move_stack: List[chess.Move] """ The move stack. Use :func:`Board.push() `, @@ -1521,14 +1490,42 @@ def __init__(self: BoardT, fen: Optional[str] = STARTING_FEN, *, chess960: bool else: self.set_fen(fen) - @property - def pseudo_legal_moves(self) -> PseudoLegalMoveGenerator: - return PseudoLegalMoveGenerator(self) - @property def legal_moves(self) -> LegalMoveGenerator: + """ + A dynamic list of legal moves. + + >>> import chess + >>> + >>> board = chess.Board() + >>> board.legal_moves.count() + 20 + >>> bool(board.legal_moves) + True + >>> move = chess.Move.from_uci("g1f3") + >>> move in board.legal_moves + True + + Wraps :func:`~chess.Board.generate_legal_moves()` and + :func:`~chess.Board.is_legal()`. + """ return LegalMoveGenerator(self) + + @property + def pseudo_legal_moves(self) -> PseudoLegalMoveGenerator: + """ + A dynamic list of pseudo-legal moves, much like the legal move list. + + Pseudo-legal moves might leave or put the king in check, but are + otherwise valid. Null moves are not pseudo-legal. Castling moves are + only included if they are completely legal. + + Wraps :func:`~chess.Board.generate_pseudo_legal_moves()` and + :func:`~chess.Board.is_pseudo_legal()`. + """ + return PseudoLegalMoveGenerator(self) + def reset(self) -> None: """Restores the starting position.""" self.turn = WHITE From cae9f6b342f429442073dbd20b1ec8ec23da480d Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 22 Oct 2020 00:20:37 +0200 Subject: [PATCH 062/613] Port remaining py:attribute docs to fields --- chess/__init__.py | 4 +- chess/engine.py | 111 +++++++++++++++++++++++++++-- chess/pgn.py | 63 +++++++++++++++-- chess/polyglot.py | 12 ++++ chess/svg.py | 9 +++ docs/engine.rst | 173 +--------------------------------------------- docs/pgn.rst | 57 --------------- docs/polyglot.rst | 26 +------ docs/svg.rst | 15 ---- 9 files changed, 191 insertions(+), 279 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index b4aac23cf..67c7103fd 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -1456,7 +1456,7 @@ class Board(BaseBoard): halfmove_clock: int """The number of half-moves since the last capture or pawn move.""" - promoted: chess.Bitboard + promoted: Bitboard """A bitmask of pieces that have been promoted.""" chess960: bool @@ -1465,7 +1465,7 @@ class Board(BaseBoard): represented as king moves to the corresponding rook square. """ - move_stack: List[chess.Move] + move_stack: List[Move] """ The move stack. Use :func:`Board.push() `, :func:`Board.pop() `, diff --git a/chess/engine.py b/chess/engine.py index 0f0e9431f..68871adfa 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -220,11 +220,42 @@ class Option: """Information about an available engine option.""" name: str + """The name of the option.""" + type: str + """ + The type of the option. + + +--------+-----+------+------------------------------------------------+ + | type | UCI | CECP | value | + +========+=====+======+================================================+ + | check | X | X | ``True`` or ``False`` | + +--------+-----+------+------------------------------------------------+ + | button | X | X | ``None`` | + +--------+-----+------+------------------------------------------------+ + | reset | | X | ``None`` | + +--------+-----+------+------------------------------------------------+ + | save | | X | ``None`` | + +--------+-----+------+------------------------------------------------+ + | string | X | X | string without line breaks | + +--------+-----+------+------------------------------------------------+ + | file | | X | string, interpreted as the path to a file | + +--------+-----+------+------------------------------------------------+ + | path | | X | string, interpreted as the path to a directory | + +--------+-----+------+------------------------------------------------+ + """ + default: ConfigValue + """The default value of the option.""" + min: Optional[int] + """The minimum integer value of a *spin* option.""" + max: Optional[int] + """The maximum integer value of a *spin* option.""" + var: Optional[List[str]] + """A list of allowed string values for a *combo* option.""" def parse(self, value: ConfigValue) -> ConfigValue: if self.type == "check": @@ -267,14 +298,34 @@ class Limit: """Search-termination condition.""" time: Optional[float] = None + """Search exactly *time* seconds.""" + depth: Optional[int] = None + """Search *depth* ply only.""" + nodes: Optional[int] = None + """Search only a limited number of *nodes*.""" + mate: Optional[int] = None + """Search for a mate in *mate* moves.""" + white_clock: Optional[float] = None + """Time in seconds remaining for White.""" + black_clock: Optional[float] = None + """Time in seconds remaining for Black.""" + white_inc: Optional[float] = None + """Fisher increment for White, in seconds.""" + black_inc: Optional[float] = None + """Fisher increment for Black, in seconds.""" + remaining_moves: Optional[int] = None + """ + Number of moves to the next time control. If this is not set, but + *white_clock* and *black_clock* are, then it is sudden death. + """ def __repr__(self) -> str: # Like default __repr__, but without None values. @@ -325,6 +376,24 @@ class InfoDict(typing.TypedDict, total=False): class PlayResult: """Returned by :func:`chess.engine.Protocol.play()`.""" + move: Optional[chess.Move] + """The best move according to the engine, or ``None``.""" + + ponder: Optional[chess.Move] + """The response that the engine expects after *move*, or ``None``.""" + + info: InfoDict + """ + A dictionary of extra :class:`information ` + sent by the engine. + """ + + draw_offered: bool + """Whether the engine offered a draw before moving.""" + + resigned: bool + """Whether the engine resigned.""" + def __init__(self, move: Optional[chess.Move], ponder: Optional[chess.Move], @@ -334,7 +403,7 @@ def __init__(self, resigned: bool = False) -> None: self.move = move self.ponder = ponder - self.info: InfoDict = info or {} + self.info = info or {} self.draw_offered = draw_offered self.resigned = resigned @@ -366,6 +435,12 @@ class Info(enum.IntFlag): class PovScore: """A relative :class:`~chess.engine.Score` and the point of view.""" + relative: Score + """The relative :class:`~chess.engine.Score`.""" + + turn: Color + """The point of view (``chess.WHITE`` or ``chess.BLACK``).""" + def __init__(self, relative: Score, turn: Color) -> None: self.relative = relative self.turn = turn @@ -826,8 +901,17 @@ def get_returncode(self) -> Optional[int]: class Protocol(asyncio.SubprocessProtocol, metaclass=abc.ABCMeta): """Protocol for communicating with a chess engine process.""" - id: Dict[str, str] options: MutableMapping[str, Option] + """Dictionary of available options.""" + + id: Dict[str, str] + """ + Dictionary of information about the engine. Common keys are ``name`` + and ``author``. + """ + + returncode: asyncio.Future[int] + """Future: Exit code of the process.""" def __init__(self: ProtocolT) -> None: self.loop = asyncio.get_running_loop() @@ -963,8 +1047,9 @@ async def configure(self, options: ConfigMapping) -> None: Configures global engine options. :param options: A dictionary of engine options where the keys are - names of :py:attr:`~options`. Do not set options that are - managed automatically (:func:`chess.engine.Option.is_managed()`). + names of :data:`~chess.engine.Protocol.options`. Do not set options + that are managed automatically + (:func:`chess.engine.Option.is_managed()`). """ @abc.abstractmethod @@ -2302,6 +2387,12 @@ def _parse_xboard_post(line: str, root_board: chess.Board, selector: Info = INFO class BestMove: """Returned by :func:`chess.engine.AnalysisResult.wait()`.""" + move: Optional[chess.Move] + """The best move according to the engine, or ``None``.""" + + ponder: Optional[chess.Move] + """The response that the engine expects after *move*, or ``None``.""" + def __init__(self, move: Optional[chess.Move], ponder: Optional[chess.Move]): self.move = move self.ponder = ponder @@ -2321,13 +2412,19 @@ class AnalysisResult: Automatically stops the analysis when used as a context manager. """ + multipv: List[chess.engine.InfoDict] + """ + A list of dictionaries with aggregated information sent by the engine. + One item for each root move. + """ + def __init__(self, stop: Optional[Callable[[], None]] = None): self._stop = stop self._queue: asyncio.Queue[InfoDict] = asyncio.Queue() self._posted_kork = False self._seen_kork = False self._finished: asyncio.Future[BestMove] = asyncio.Future() - self.multipv: List[InfoDict] = [{}] + self.multipv = [{}] def post(self, info: InfoDict) -> None: # Empty dictionary reserved for kork. @@ -2357,6 +2454,10 @@ def set_exception(self, exc: Exception) -> None: @property def info(self) -> InfoDict: + """ + A dictionary of aggregated information sent by the engine. This is + actually an alias for ``multipv[0]``. + """ return self.multipv[0] def stop(self) -> None: diff --git a/chess/pgn.py b/chess/pgn.py index a88099f70..d9c567b72 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -161,12 +161,47 @@ def __init__(self, node: GameNode, *, is_variation: bool = False, sidelines: boo class GameNode: + + parent: Optional[GameNode] + """ + The parent node or ``None`` if this is the root node of the game. + """ + + move: Optional[chess.Move] + """ + The move leading to this node or ``None`` if this is the root node of the + game. + """ + + nags: Set[int] + """ + A set of NAGs as integers. NAGs always go behind a move, so the root + node of the game will never have NAGs. + """ + + comment: str + """ + A comment that goes behind the move leading to this node. Comments + that occur before any moves are assigned to the root node. + """ + + starting_comment: str + """ + A comment for the start of a variation. Only nodes that + actually start a variation (:func:`~chess.pgn.GameNode.starts_variation()` + checks this) can have a starting comment. The root node can not have + a starting comment. + """ + + variations: List[GameNode] + """A list of child nodes.""" + def __init__(self) -> None: - self.parent: Optional[GameNode] = None - self.variations: List[GameNode] = [] + self.parent = None + self.variations = [] - self.move: Optional[chess.Move] = None - self.nags: Set[int] = set() + self.move = None + self.nags = set() self.starting_comment = "" self.comment = "" @@ -670,10 +705,28 @@ class Game(GameNode): :class:`~chess.pgn.GameNode`. """ + headers: Headers + """ + A mapping of headers. By default, the following 7 headers are provided + (Seven Tag Roster): + + >>> import chess.pgn + >>> + >>> game = chess.pgn.Game() + >>> game.headers + Headers(Event='?', Site='?', Date='????.??.??', Round='?', White='?', Black='?', Result='*') + """ + + errors: List[Exception] + """ + A list of errors (such as illegal or ambiguous moves) encountered while + parsing the game. + """ + def __init__(self, headers: Optional[Union[Mapping[str, str], Iterable[Tuple[str, str]]]] = None) -> None: super().__init__() self.headers = Headers(headers) - self.errors: List[Exception] = [] + self.errors = [] def _board(self) -> chess.Board: return self.headers.board() diff --git a/chess/polyglot.py b/chess/polyglot.py index 6851b8d8b..eaec7b631 100644 --- a/chess/polyglot.py +++ b/chess/polyglot.py @@ -303,10 +303,22 @@ class Entry(NamedTuple): """An entry from a Polyglot opening book.""" key: int + """The Zobrist hash of the position.""" + raw_move: int + """ + The raw binary representation of the move. Use + :data:`~chess.polyglot.Entry.move` instead. + """ + weight: int + """An integer value that can be used as the weight for this entry.""" + learn: int + """Another integer value that can be used for extra information.""" + move: chess.Move + """The :class:`~chess.Move`.""" class _EmptyMmap(bytearray): diff --git a/chess/svg.py b/chess/svg.py index 59fca6a4a..d6ebae274 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -87,6 +87,15 @@ class Arrow: """Details of an arrow to be drawn.""" + tail: Square + """Start square of the arrow.""" + + head: Square + """End square of the arrow.""" + + color: str + """Arrow color.""" + def __init__(self, tail: Square, head: Square, *, color: str = "green") -> None: self.tail = tail self.head = head diff --git a/docs/engine.rst b/docs/engine.rst index ab0e548ad..bf9e31eae 100644 --- a/docs/engine.rst +++ b/docs/engine.rst @@ -62,81 +62,9 @@ Example: Let Stockfish play against itself, 100 milliseconds per move. .. autoclass:: chess.engine.Limit :members: - .. py:attribute:: time - :type: Optional[float] - - Search exactly *time* seconds. - - .. py:attribute:: depth - :type: Optional[int] - - Search *depth* ply only. - - .. py:attribute:: nodes - :type: Optional[int] - - Search only a limited number of *nodes*. - - .. py:attribute:: mate - :type: Optional[int] - - Search for a mate in *mate* moves. - - .. py:attribute:: white_clock - :type: Optional[float] - - Time in seconds remaining for White. - - .. py:attribute:: black_clock - :type: Optional[float] - - Time in seconds remaining for Black. - - .. py:attribute:: white_inc - :type: Optional[float] - - Fisher increment for White, in seconds. - - .. py:attribute:: black_inc - :type: Optional[float] - - Fisher increment for Black, in seconds. - - .. py:attribute:: remaining_moves - :type: Optional[int] - - Number of moves to the next time control. If this is not set, but - *white_clock* and *black_clock* are, then it is sudden death. - .. autoclass:: chess.engine.PlayResult :members: - .. py:attribute:: move - :type: Optional[chess.Move] - - The best move according to the engine, or ``None``. - - .. py:attribute:: ponder - :type: Optional[chess.Move] - - The response that the engine expects after *move*, or ``None``. - - .. py:attribute:: info - :type: chess.engine.InfoDict - - A dictionary of extra :class:`information ` - sent by the engine. - - .. py:attribute:: draw_offered - :type: bool - - Whether the engine offered a draw before moving. - - .. py:attribute:: resigned - :type: bool - - Whether the engine resigned. - Analysing and evaluating a position ----------------------------------- @@ -193,16 +121,6 @@ Example: .. autoclass:: chess.engine.PovScore :members: - .. py:attribute:: relative - :type: chess.engine.Score - - The relative :class:`~chess.engine.Score`. - - .. py:attribute:: turn - :type: chess.Color - - The point of view (``chess.WHITE`` or ``chess.BLACK``). - .. autoclass:: chess.engine.Score :members: @@ -262,31 +180,9 @@ Example: Stream information from the engine and stop on an arbitrary condition. .. autoclass:: chess.engine.AnalysisResult :members: - .. py:attribute:: info - :type: chess.engine.InfoDict - - A dictionary of aggregated information sent by the engine. This is - actually an alias for ``multipv[0]``. - - .. py:attribute:: multipv - :type: List[chess.engine.InfoDict] - - A list of dictionaries with aggregated information sent by the engine. - One item for each root move. - .. autoclass:: chess.engine.BestMove :members: - .. py:attribute:: move - :type: Optional[chess.Move] - - The best move according to the engine, or ``None``. - - .. py:attribute:: ponder - :type: Optional[chess.Move] - - The response that the engine expects after *move*, or ``None``. - Options ------- @@ -329,62 +225,10 @@ Option(name='Hash', type='spin', default=16, min=1, max=131072, var=[]) asyncio.run(main()) .. autoclass:: chess.engine.Protocol - :members: configure - - .. py:attribute:: options - :type: MutableMapping[str, chess.engine.Option] - - Dictionary of available options. + :members: options, configure .. autoclass:: chess.engine.Option - :members: is_managed - - .. py:attribute:: name - :type: str - - The name of the option. - - .. py:attribute:: type - - The type of the option. - - +--------+-----+------+------------------------------------------------+ - | type | UCI | CECP | value | - +========+=====+======+================================================+ - | check | X | X | ``True`` or ``False`` | - +--------+-----+------+------------------------------------------------+ - | button | X | X | ``None`` | - +--------+-----+------+------------------------------------------------+ - | reset | | X | ``None`` | - +--------+-----+------+------------------------------------------------+ - | save | | X | ``None`` | - +--------+-----+------+------------------------------------------------+ - | string | X | X | string without line breaks | - +--------+-----+------+------------------------------------------------+ - | file | | X | string, interpreted as the path to a file | - +--------+-----+------+------------------------------------------------+ - | path | | X | string, interpreted as the path to a directory | - +--------+-----+------+------------------------------------------------+ - - .. py:attribute:: default - :type: chess.engine.ConfigValue - - The default value of the option. - - .. py:attribute:: min - :type: Optional[int] - - The minimum integer value of a *spin* option. - - .. py:attribute:: max - :type: Optional[int] - - The maximum integer value of a *spin* option. - - .. py:attribute:: var - :type: Optional[List[str]] - - A list of allowed string values for a *combo* option. + :members: Logging ------- @@ -438,18 +282,7 @@ Reference .. autofunction:: chess.engine.popen_xboard .. autoclass:: chess.engine.Protocol - :members: initialize, ping, quit - - .. py:attribute:: returncode - :type: asyncio.Future[int] - - Future: Exit code of the process. - - .. py:attribute:: id - :type: Dict[str, str] - - Dictionary of information about the engine. Common keys are ``name`` - and ``author``. + :members: id, returncode, initialize, ping, quit .. autoclass:: chess.engine.UciProtocol diff --git a/docs/pgn.rst b/docs/pgn.rst index 00f63cdbf..a1307795b 100644 --- a/docs/pgn.rst +++ b/docs/pgn.rst @@ -50,66 +50,9 @@ holds general information, such as game headers. .. autoclass:: chess.pgn.Game :members: - .. py:attribute:: headers - :type: chess.pgn.Headers - - A mapping of headers. By default, the following 7 headers are provided - (Seven Tag Roster): - - >>> import chess.pgn - >>> - >>> game = chess.pgn.Game() - >>> game.headers - Headers(Event='?', Site='?', Date='????.??.??', Round='?', White='?', Black='?', Result='*') - - .. py:attribute:: errors - :type: List[Exception] - - A list of errors (such as illegal or ambiguous moves) encountered while - parsing the game. - .. autoclass:: chess.pgn.GameNode :members: - .. py:attribute:: parent - :type: Optional[chess.pgn.GameNode] - - The parent node or ``None`` if this is the root node of the game. - - .. py:attribute:: move - :type: Optional[chess.Move] - - The move leading to this node or ``None`` if this is the root node of the - game. - - .. py:attribute:: nags - :type: Set[int] - :value: set() - - A set of NAGs as integers. NAGs always go behind a move, so the root - node of the game will never have NAGs. - - .. py:attribute:: comment - :type: str - :value: '' - - A comment that goes behind the move leading to this node. Comments - that occur before any moves are assigned to the root node. - - .. py:attribute:: starting_comment - :type: str - :value: '' - - A comment for the start of a variation. Only nodes that - actually start a variation (:func:`~chess.pgn.GameNode.starts_variation()` - checks this) can have a starting comment. The root node can not have - a starting comment. - - .. py:attribute:: variations - :type: List[chess.pgn.GameNode] - - A list of child nodes. - Visitors -------- diff --git a/docs/polyglot.rst b/docs/polyglot.rst index ecdd14ade..18c94c426 100644 --- a/docs/polyglot.rst +++ b/docs/polyglot.rst @@ -4,32 +4,8 @@ Polyglot opening book reading .. autofunction:: chess.polyglot.open_reader .. autoclass:: chess.polyglot.Entry + :members: - .. py:attribute:: key - :type: int - - The Zobrist hash of the position. - - .. py:attribute:: raw_move - :type: int - - The raw binary representation of the move. Use - :data:`~chess.polyglot.Entry.move` instead. - - .. py:attribute:: weight - :type: int - - An integer value that can be used as the weight for this entry. - - .. py:attribute:: learn - :type: int - - Another integer value that can be used for extra information. - - .. py:attribute:: move - :type: chess.Move - - The :class:`~chess.Move`. .. autoclass:: chess.polyglot.MemoryMappedReader :members: diff --git a/docs/svg.rst b/docs/svg.rst index 6921db411..b839f10a7 100644 --- a/docs/svg.rst +++ b/docs/svg.rst @@ -13,18 +13,3 @@ licensed under the GFDL, BSD and GPL. .. autoclass:: chess.svg.Arrow :members: - - .. py:attribute:: tail - :type: chess.Square - - Start square of the arrow. - - .. py:attribute:: head - :type: chess.Square - - End square of the arrow. - - .. py:attribute:: color - :value: 'green' - - Arrow color. From f68f7b330265402747da34c8944480132baed745 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 22 Oct 2020 00:22:12 +0200 Subject: [PATCH 063/613] Add a comma --- chess/engine.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index 68871adfa..b8ba32199 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -556,7 +556,7 @@ def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: >>> Cp(500).wdl().expectation() - Cp(300).wdl().expectation() # doctest: +ELLIPSIS 0.015... - :param model: Currently the only implemented model is ``sf12``, the + :param model: Currently, the only implemented model is ``sf12``, the win rate model used by Stockfish 12. :param ply: The number of half-moves played since the starting position. Models may scale scores slightly differently based on From 049f66786f1afde64d579efa67a67173f634d4c8 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 22 Oct 2020 01:04:49 +0200 Subject: [PATCH 064/613] Prepare changelog --- CHANGELOG.rst | 25 +++++++++++++++++++++++++ release.py | 4 ++-- 2 files changed, 27 insertions(+), 2 deletions(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 48fe80784..b593d5e19 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,6 +1,31 @@ Changelog for python-chess ========================== +Upcoming in v1.2.0 +------------------ + +New features: + +* Added `chess.Board.ply()`. +* Added `chess.pgn.GameNode.ply()` and `chess.pgn.GameNode.turn()`. +* Added `chess.engine.PovWdl`, `chess.engine.Wdl`, and conversions from score: + `chess.engine.PovScore.wdl()`, `chess.engine.Score.wdl()`. +* Added `chess.engine.Score(*, mate_score: int) -> int` overload. + +Changes: + +* The `PovScore` returned by `chess.pgn.GameNode.eval()` is now always + relative to the side to move. The ambiguity around `[%eval #0]` has been + resolved to `Mate(-0)`. This makes sense, given that the authors had standard + chess in mind (where a game ending move is always a loss for the opponent). +* Typed `chess.engine.InfoDict["wdl"]` as the new `chess.engine.PovWdl`, rather + than `Tuple[int, int, int]`. The new type is backwards compatible, but it + is recommended to use its documented fields and methods instead. +* Removed `chess.engine.PovScore.__str__()`. String representation falls back + to `__repr__`. +* The `en_passant` parameter of `chess.Board.fen()` and `chess.Board.epd()` is + now typed as `Literal["legal", "fen", "xfen"]` rather than `str`. + New in v1.1.0 ------------- diff --git a/release.py b/release.py index de5c1de29..0d0336057 100755 --- a/release.py +++ b/release.py @@ -35,8 +35,8 @@ def check_changelog(): with open("CHANGELOG.rst", "r") as changelog_file: changelog = changelog_file.read() - if "Upcoming in the next release" in changelog: - print("Found: Upcoming in the next release") + if "Upcoming in" in changelog: + print("Found: Upcoming in") sys.exit(1) tagname = f"v{chess.__version__}" From 6c20669b0c2363115475a183a228152ff4ce0e77 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 22 Oct 2020 10:45:37 +0200 Subject: [PATCH 065/613] Explicit type annotations for reamining class vars --- chess/__init__.py | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index 67c7103fd..e6da36a39 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -1395,10 +1395,10 @@ class Board(BaseBoard): Use :func:`~chess.Board.is_valid()` to detect invalid positions. """ - aliases = ["Standard", "Chess", "Classical", "Normal", "Illegal", "From Position"] + aliases: ClassVar[List[str]] = ["Standard", "Chess", "Classical", "Normal", "Illegal", "From Position"] uci_variant: ClassVar[Optional[str]] = "chess" xboard_variant: ClassVar[Optional[str]] = "normal" - starting_fen = STARTING_FEN + starting_fen: ClassVar[str] = STARTING_FEN tbw_suffix: ClassVar[Optional[str]] = ".rtbw" tbz_suffix: ClassVar[Optional[str]] = ".rtbz" @@ -1511,7 +1511,6 @@ def legal_moves(self) -> LegalMoveGenerator: """ return LegalMoveGenerator(self) - @property def pseudo_legal_moves(self) -> PseudoLegalMoveGenerator: """ From dc529b2c640b17c1b163582d81bd4e17cf6ae6cc Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 22 Oct 2020 01:06:45 +0200 Subject: [PATCH 066/613] Clarify change around [%eval #0] --- CHANGELOG.rst | 1 + 1 file changed, 1 insertion(+) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index b593d5e19..6c20d762a 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -18,6 +18,7 @@ Changes: relative to the side to move. The ambiguity around `[%eval #0]` has been resolved to `Mate(-0)`. This makes sense, given that the authors had standard chess in mind (where a game ending move is always a loss for the opponent). + Previously this would be parsed as `None`. * Typed `chess.engine.InfoDict["wdl"]` as the new `chess.engine.PovWdl`, rather than `Tuple[int, int, int]`. The new type is backwards compatible, but it is recommended to use its documented fields and methods instead. From a07d343b0613c1b745eb074f49d5b35a4bc65f6a Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 22 Oct 2020 13:15:06 +0200 Subject: [PATCH 067/613] Fix rst in CHANGELOG (at least in the new one) --- CHANGELOG.rst | 49 +++++++++++++++++++++++++------------------------ 1 file changed, 25 insertions(+), 24 deletions(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 6c20d762a..cde11fcde 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -6,40 +6,41 @@ Upcoming in v1.2.0 New features: -* Added `chess.Board.ply()`. -* Added `chess.pgn.GameNode.ply()` and `chess.pgn.GameNode.turn()`. -* Added `chess.engine.PovWdl`, `chess.engine.Wdl`, and conversions from score: - `chess.engine.PovScore.wdl()`, `chess.engine.Score.wdl()`. -* Added `chess.engine.Score(*, mate_score: int) -> int` overload. +* Added ``chess.Board.ply()``. +* Added ``chess.pgn.GameNode.ply()`` and ``chess.pgn.GameNode.turn()``. +* Added ``chess.engine.PovWdl``, ``chess.engine.Wdl``, and conversions from + scores: ``chess.engine.PovScore.wdl()``, ``chess.engine.Score.wdl()``. +* Added ``chess.engine.Score(*, mate_score: int) -> int`` overload. Changes: -* The `PovScore` returned by `chess.pgn.GameNode.eval()` is now always - relative to the side to move. The ambiguity around `[%eval #0]` has been - resolved to `Mate(-0)`. This makes sense, given that the authors had standard - chess in mind (where a game ending move is always a loss for the opponent). - Previously this would be parsed as `None`. -* Typed `chess.engine.InfoDict["wdl"]` as the new `chess.engine.PovWdl`, rather - than `Tuple[int, int, int]`. The new type is backwards compatible, but it - is recommended to use its documented fields and methods instead. -* Removed `chess.engine.PovScore.__str__()`. String representation falls back - to `__repr__`. -* The `en_passant` parameter of `chess.Board.fen()` and `chess.Board.epd()` is - now typed as `Literal["legal", "fen", "xfen"]` rather than `str`. +* The ``PovScore`` returned by ``chess.pgn.GameNode.eval()`` is now always + relative to the side to move. The ambiguity around ``[%eval #0]`` has been + resolved to ``Mate(-0)``. This makes sense, given that the authors had + standard chess in mind (where a game ending move is always a loss for the + opponent). Previously this would be parsed as ``None``. +* Typed ``chess.engine.InfoDict["wdl"]`` as the new ``chess.engine.PovWdl``, + rather than ``Tuple[int, int, int]``. The new type is backwards compatible, + but it is recommended to use its documented fields and methods instead. +* Removed ``chess.engine.PovScore.__str__()``. String representation falls back + to ``__repr__``. +* The ``en_passant`` parameter of ``chess.Board.fen()`` and + ``chess.Board.epd()`` is now typed as ``Literal["legal", "fen", "xfen"]`` + rather than ``str``. New in v1.1.0 ------------- New features: -* Added `chess.svg.board(..., orientation)`. This is a more idiomatic way to - set the board orientation than `flipped`. -* Added `chess.svg.Arrow.pgn()` and `chess.svg.Arrow.from_pgn()`. +* Added ``chess.svg.board(..., orientation)``. This is a more idiomatic way to + set the board orientation than ``flipped``. +* Added ``chess.svg.Arrow.pgn()`` and ``chess.svg.Arrow.from_pgn()``. Changes: -* Further relaxed `chess.Board.parse_san()`. Now accepts fully specified moves - like `e2e4`, even if that is not a pawn move, castling notation with zeros, +* Further relaxed ``chess.Board.parse_san()``. Now accepts fully specified moves + like ``e2e4``, even if that is not a pawn move, castling notation with zeros, null moves in UCI notation, and null moves in XBoard notation. New in v1.0.1 @@ -47,8 +48,8 @@ New in v1.0.1 Bugfixes: -* `chess.svg`: Restore SVG Tiny compatibility by splitting colors like - `#rrggbbaa` into a solid color and opacity. +* ``chess.svg``: Restore SVG Tiny compatibility by splitting colors like + ``#rrggbbaa`` into a solid color and opacity. New in v1.0.0 ------------- From bbf87dbf09affcccb341762266eb140abe15628a Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 22 Oct 2020 13:20:11 +0200 Subject: [PATCH 068/613] Add deprecation notice for PovWdl tuple like behavior --- chess/engine.py | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/chess/engine.py b/chess/engine.py index b8ba32199..6732a57ed 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -736,6 +736,12 @@ class PovWdl: """ Relative :class:`win/draw/loss statistics ` and the point of view. + + .. deprecated:: 1.2 + Behaves like a tuple + ``(wdl.relative.wins, wdl.relative.draws, wdl.relative.losses)`` + for backwards compatibility. But it is recommended to use the provided + fields and methods instead. """ relative: Wdl From 8b7ed230711e3020422b2ab5c3b6fe2c870630fe Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 22 Oct 2020 13:39:49 +0200 Subject: [PATCH 069/613] Prepare 1.2.0 --- CHANGELOG.rst | 6 +++--- chess/__init__.py | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index cde11fcde..7a7f90855 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,8 +1,8 @@ Changelog for python-chess ========================== -Upcoming in v1.2.0 ------------------- +New in v1.2.0 +------------- New features: @@ -48,7 +48,7 @@ New in v1.0.1 Bugfixes: -* ``chess.svg``: Restore SVG Tiny compatibility by splitting colors like +* ``chess.svg``: Restored SVG Tiny compatibility by splitting colors like ``#rrggbbaa`` into a solid color and opacity. New in v1.0.0 diff --git a/chess/__init__.py b/chess/__init__.py index e6da36a39..94e11b6dc 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -26,7 +26,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.1.0" +__version__ = "1.2.0" import collections import copy From 1164b787ce9f5209f695667ed15e56c3498e154d Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bo=C5=A1tjan=20Mejak?= Date: Fri, 23 Oct 2020 02:53:09 +0200 Subject: [PATCH 070/613] Fix some commas and words Found some bad apples and threw them away. --- chess/engine.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 6732a57ed..182a12466 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -777,8 +777,8 @@ def __repr__(self) -> str: # Unfortunately in python-chess v1.1.0, info["wdl"] was a simple tuple # of the relative permille values, so we have to support __iter__, - # __len__, __getitem__ and equality comparisons with other tuples. - # Nevermind ordering, because thats not a sensible operation anyway. + # __len__, __getitem__, and equality comparisons with other tuples. + # Never mind the ordering, because that's not a sensible operation, anyway. def __iter__(self) -> Iterator[int]: yield self.relative.wins @@ -815,7 +815,7 @@ class Wdl: def total(self) -> int: """ - Returns the total number of games. Usually ``wdl`` reported by engines + Returns the total number of games. Usually, ``wdl`` reported by engines is scaled to 1000 games. """ return self.wins + self.draws + self.losses From 16e6543466f1982b4074c94580858495f39ccbd0 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 23 Oct 2020 11:44:39 +0200 Subject: [PATCH 071/613] Some post hoc changelog fixes for 1.2.0 --- CHANGELOG.rst | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 7a7f90855..ff382fa39 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -10,15 +10,16 @@ New features: * Added ``chess.pgn.GameNode.ply()`` and ``chess.pgn.GameNode.turn()``. * Added ``chess.engine.PovWdl``, ``chess.engine.Wdl``, and conversions from scores: ``chess.engine.PovScore.wdl()``, ``chess.engine.Score.wdl()``. -* Added ``chess.engine.Score(*, mate_score: int) -> int`` overload. +* Added ``chess.engine.Score.score(*, mate_score: int) -> int`` overload. Changes: * The ``PovScore`` returned by ``chess.pgn.GameNode.eval()`` is now always relative to the side to move. The ambiguity around ``[%eval #0]`` has been - resolved to ``Mate(-0)``. This makes sense, given that the authors had - standard chess in mind (where a game ending move is always a loss for the - opponent). Previously this would be parsed as ``None``. + resolved to ``Mate(-0)``. This makes sense, given that the authors of the + specification probably had standard chess in mind (where a game ending move + is always a loss for the opponent). Previously this would be parsed as + ``None``. * Typed ``chess.engine.InfoDict["wdl"]`` as the new ``chess.engine.PovWdl``, rather than ``Tuple[int, int, int]``. The new type is backwards compatible, but it is recommended to use its documented fields and methods instead. From 133aa36028c8d635c0f36c0695c068eebc86e1ea Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 23 Oct 2020 12:30:54 +0200 Subject: [PATCH 072/613] Fix a missed delayed type annotation --- chess/pgn.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/pgn.py b/chess/pgn.py index d9c567b72..4f5b541b3 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -305,7 +305,7 @@ def root(self) -> GameNode: node = node.parent return node - def game(self) -> "Game": + def game(self) -> Game: """Gets the root node, i.e., the game.""" root = self.root() assert isinstance(root, Game), "GameNode not rooted in Game" From f3ca606934cd2cd9b1baff81008720e00e1d640e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bo=C5=A1tjan=20Mejak?= Date: Fri, 23 Oct 2020 15:46:27 +0200 Subject: [PATCH 073/613] Fix CHANGELOG.rst Added a hyphen and a comma. --- CHANGELOG.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index ff382fa39..07d76bc2f 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -17,8 +17,8 @@ Changes: * The ``PovScore`` returned by ``chess.pgn.GameNode.eval()`` is now always relative to the side to move. The ambiguity around ``[%eval #0]`` has been resolved to ``Mate(-0)``. This makes sense, given that the authors of the - specification probably had standard chess in mind (where a game ending move - is always a loss for the opponent). Previously this would be parsed as + specification probably had standard chess in mind (where a game-ending move + is always a loss for the opponent). Previously, this would be parsed as ``None``. * Typed ``chess.engine.InfoDict["wdl"]`` as the new ``chess.engine.PovWdl``, rather than ``Tuple[int, int, int]``. The new type is backwards compatible, From a2e286bddfd191655fdf26b4ae188508934ed569 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 26 Oct 2020 11:37:37 +0100 Subject: [PATCH 074/613] Prepare python-chess -> chess transition (#678) --- CHANGELOG.rst | 12 ++++++++++++ README.rst | 23 ++++++++++++----------- setup.py | 2 +- 3 files changed, 25 insertions(+), 12 deletions(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 07d76bc2f..5a4113cc6 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,6 +1,18 @@ Changelog for python-chess ========================== +Upcoming in v1.2.1 +------------------ + +The primary location for the published package is now +https://pypi.org/project/chess/. Thanks to +`Kristian Glass `_ for transferring the +namespace. + +The old https://pypi.org/project/python-chess/ will remain an alias that +installs the package from the new location as a dependency (as recommended by +`PEP423 `_). + New in v1.2.0 ------------- diff --git a/README.rst b/README.rst index a457c97ce..18c308a04 100644 --- a/README.rst +++ b/README.rst @@ -13,8 +13,8 @@ python-chess: a pure Python chess library :target: https://coveralls.io/github/niklasf/python-chess?branch=master :alt: coverage -.. image:: https://badge.fury.io/py/python-chess.svg - :target: https://pypi.python.org/pypi/python-chess +.. image:: https://badge.fury.io/py/chess.svg + :target: https://pypi.python.org/pypi/chess :alt: pypi package .. image:: https://readthedocs.org/projects/python-chess/badge/?version=latest @@ -64,6 +64,16 @@ python-chess: >>> board Board('r1bqkb1r/pppp1Qpp/2n2n2/4p3/2B1P3/8/PPPP1PPP/RNB1K1NR b KQkq - 0 4') +Installing +---------- + +Download and install the latest release: + +:: + + pip install chess + + `Documentation `__ -------------------------------------------------------------------- @@ -293,15 +303,6 @@ Features >>> engine.quit() -Installing ----------- - -Download and install the latest release: - -:: - - pip install python-chess - Selected use cases ------------------ diff --git a/setup.py b/setup.py index e3057a29d..c1e795374 100755 --- a/setup.py +++ b/setup.py @@ -75,7 +75,7 @@ def read_description(): setuptools.setup( - name="python-chess", + name="chess", version=chess.__version__, author=chess.__author__, author_email=chess.__email__, From d78aa1a0bc723bbd6010143d43ab8e47390a46fd Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 26 Oct 2020 11:50:00 +0100 Subject: [PATCH 075/613] Update acknowledgements --- README.rst | 3 +++ 1 file changed, 3 insertions(+) diff --git a/README.rst b/README.rst index 18c308a04..d4292bc78 100644 --- a/README.rst +++ b/README.rst @@ -335,6 +335,9 @@ Thanks to Ronald de Man for his `Syzygy endgame tablebases `_. The probing code in python-chess is very directly ported from his C probing code. +Thanks to `Kristian Glass `_ for +transferring the namespace ``chess`` on PyPI. + License ------- From 800b05bf289d6be80029c27db522fe96fa8bc110 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 26 Oct 2020 12:02:03 +0100 Subject: [PATCH 076/613] Rename as per PEP423 (closes #678) --- python-chess-stub/README.rst | 10 ++++++++++ python-chess-stub/setup.py | 26 ++++++++++++++++++++++++++ setup.py | 1 + 3 files changed, 37 insertions(+) create mode 100644 python-chess-stub/README.rst create mode 100755 python-chess-stub/setup.py diff --git a/python-chess-stub/README.rst b/python-chess-stub/README.rst new file mode 100644 index 000000000..f672aeb9a --- /dev/null +++ b/python-chess-stub/README.rst @@ -0,0 +1,10 @@ +python-chess +============ + +Package moved +------------- + +This package has been moved to https://pypi.org/project/chess/. + +Thanks to `Kristian Glass `_ for making +the package name available. diff --git a/python-chess-stub/setup.py b/python-chess-stub/setup.py new file mode 100755 index 000000000..a0c4ef0d6 --- /dev/null +++ b/python-chess-stub/setup.py @@ -0,0 +1,26 @@ +#!/usr/bin/env python3 +# -*- coding: utf-8 -*- + +import os +import setuptools + +setuptools.setup( + name="python-chess", + version="1.999", + author="Niklas Fiekas", + author_email="niklas.fiekas@backscattering.de", + description="A chess library with move generation, move validation, and support for common formats.", + long_description=open(os.path.join(os.path.dirname(__file__), "README.rst")).read(), + long_description_content_type="text/x-rst", + license="GPL-3.0+", + keywords="chess fen epd pgn polyglot syzygy gaviota uci xboard", + url="https://github.com/niklasf/python-chess", + packages=[], + install_requires=["chess>=1,<2"], + classifiers=[ + "Development Status :: 7 - Inactive", + ], + project_urls={ + "Documentation": "https://python-chess.readthedocs.io", + }, +) diff --git a/setup.py b/setup.py index c1e795374..5ce4d2a4b 100755 --- a/setup.py +++ b/setup.py @@ -111,4 +111,5 @@ def read_description(): project_urls={ "Documentation": "https://python-chess.readthedocs.io", }, + obsoletes=["python_chess"], ) From aba441fdf4884a23037111c8b2a8b30f69d67cd4 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 26 Oct 2020 12:34:43 +0100 Subject: [PATCH 077/613] Prepare 1.2.1 --- CHANGELOG.rst | 4 ++-- chess/__init__.py | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 5a4113cc6..8fd7511f2 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,8 +1,8 @@ Changelog for python-chess ========================== -Upcoming in v1.2.1 ------------------- +New in v1.2.1 +------------- The primary location for the published package is now https://pypi.org/project/chess/. Thanks to diff --git a/chess/__init__.py b/chess/__init__.py index 94e11b6dc..8fbd05e07 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -26,7 +26,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.2.0" +__version__ = "1.2.1" import collections import copy From 963ebc55566efaffac5fc9876e52a51513b9eb5e Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 27 Oct 2020 12:45:05 +0100 Subject: [PATCH 078/613] document workaround for #680 --- README.rst | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/README.rst b/README.rst index d4292bc78..5319a9d86 100644 --- a/README.rst +++ b/README.rst @@ -73,6 +73,10 @@ Download and install the latest release: pip install chess +``ModuleNotFoundError: No module named 'chess'`` after upgrading from old +python-chess versions? ``pip install --force-reinstall chess`` +(due to `#680 `_) + `Documentation `__ -------------------------------------------------------------------- From 9d10ed8236d3d4aa0a0a4ec6bacff080b7ce4824 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bo=C5=A1tjan=20Mejak?= Date: Wed, 28 Oct 2020 17:26:55 +0100 Subject: [PATCH 079/613] Add some commas (#681) --- chess/svg.py | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/chess/svg.py b/chess/svg.py index d6ebae274..b9cb6c912 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -106,7 +106,7 @@ def pgn(self) -> str: Returns the arrow in the format used by ``[%csl ...]`` and ``[%cal ...]`` PGN annotations, e.g., ``Ga1`` or ``Ya2h2``. - Colors other than ``red``, ``yellow`` and ``blue`` default to green. + Colors other than ``red``, ``yellow``, and ``blue`` default to green. """ if self.color == "red": color = "R" @@ -244,18 +244,18 @@ def board(board: Optional[chess.BaseBoard] = None, *, """ Renders a board with pieces and/or selected squares as an SVG image. - :param board: A :class:`chess.BaseBoard` for a chessboard with pieces or + :param board: A :class:`chess.BaseBoard` for a chessboard with pieces, or ``None`` (the default) for a chessboard without pieces. :param orientation: The point of view, defaulting to ``chess.WHITE``. :param lastmove: A :class:`chess.Move` to be highlighted. :param check: A square to be marked indicating a check. - :param arrows: A list of :class:`~chess.svg.Arrow` objects like - ``[chess.svg.Arrow(chess.E2, chess.E4)]`` or a list of tuples like + :param arrows: A list of :class:`~chess.svg.Arrow` objects, like + ``[chess.svg.Arrow(chess.E2, chess.E4)]``, or a list of tuples, like ``[(chess.E2, chess.E4)]``. An arrow from a square pointing to the same square is drawn as a circle, like ``[(chess.E2, chess.E2)]``. :param squares: A :class:`chess.SquareSet` with selected squares. :param size: The size of the image in pixels (e.g., ``400`` for a 400 by - 400 board) or ``None`` (the default) for no size limit. + 400 board), or ``None`` (the default) for no size limit. :param coordinates: Pass ``False`` to disable the coordinate margin. :param colors: A dictionary to override default colors. Possible keys are ``square light``, ``square dark``, ``square light lastmove``, From bfa6c6ddd183a0734cf71898b0c9169c18340c6c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bo=C5=A1tjan=20Mejak?= Date: Thu, 29 Oct 2020 11:20:27 +0100 Subject: [PATCH 080/613] One more comma Forgot to add one more comma to the docstring text of svg.board(). --- chess/svg.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/svg.py b/chess/svg.py index b9cb6c912..42b939c67 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -261,7 +261,7 @@ def board(board: Optional[chess.BaseBoard] = None, *, ``square light``, ``square dark``, ``square light lastmove``, ``square dark lastmove``, ``margin``, ``coord``, ``arrow green``, ``arrow blue``, ``arrow red``, and ``arrow yellow``. Values should look - like ``#ffce9e`` (opaque) or ``#15781B80`` (transparent). + like ``#ffce9e`` (opaque), or ``#15781B80`` (transparent). :param flipped: Pass ``True`` to flip the board. :param style: A CSS stylesheet to include in the SVG image. From dabcd200566640b65d62c4d616b462a07492490f Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 29 Oct 2020 17:48:25 +0100 Subject: [PATCH 081/613] Add py.typed marker --- chess/py.typed | 0 1 file changed, 0 insertions(+), 0 deletions(-) create mode 100644 chess/py.typed diff --git a/chess/py.typed b/chess/py.typed new file mode 100644 index 000000000..e69de29bb From 7348e966d0a63b40c73a42fd1bdd0e79422110c8 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 29 Oct 2020 18:29:32 +0100 Subject: [PATCH 082/613] Prepare 1.2.2 --- CHANGELOG.rst | 8 ++++++++ chess/__init__.py | 2 +- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 8fd7511f2..63f323550 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,6 +1,14 @@ Changelog for python-chess ========================== +New in v1.2.2 +------------- + +Bugfixes: + +* Fixed regression, where releases were uploaded without the ``py.typed`` + marker. + New in v1.2.1 ------------- diff --git a/chess/__init__.py b/chess/__init__.py index 8fbd05e07..2fd5cb15b 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -26,7 +26,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.2.1" +__version__ = "1.2.2" import collections import copy From 0e0be18f6a5097cd63d60e5a85919b0eff5e56ee Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bo=C5=A1tjan=20Mejak?= Date: Sun, 1 Nov 2020 10:49:56 +0100 Subject: [PATCH 083/613] Remove redundant comma There's no comma needed in this particular sentence in CHANGELOG.rst. So it was removed. --- CHANGELOG.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 63f323550..d18075674 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -6,7 +6,7 @@ New in v1.2.2 Bugfixes: -* Fixed regression, where releases were uploaded without the ``py.typed`` +* Fixed regression where releases were uploaded without the ``py.typed`` marker. New in v1.2.1 From 52d918e3e90e9c3d4ebbdfb64e25d1a281629259 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 2 Nov 2020 10:18:40 +0100 Subject: [PATCH 084/613] Update PovScore repr in engine docs --- docs/engine.rst | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/docs/engine.rst b/docs/engine.rst index bf9e31eae..f0517c392 100644 --- a/docs/engine.rst +++ b/docs/engine.rst @@ -80,12 +80,12 @@ Example: board = chess.Board() info = engine.analyse(board, chess.engine.Limit(time=0.1)) print("Score:", info["score"]) - # Score: +20 + # Score: PovScore(Cp(+20), WHITE) board = chess.Board("r1bqkbnr/p1pp1ppp/1pn5/4p3/2B1P3/5Q2/PPPP1PPP/RNB1K1NR w KQkq - 2 4") info = engine.analyse(board, chess.engine.Limit(depth=20)) print("Score:", info["score"]) - # Score: #+1 + # Score: PovScore(Mate(+1), WHITE) engine.quit() @@ -101,12 +101,12 @@ Example: board = chess.Board() info = await engine.analyse(board, chess.engine.Limit(time=0.1)) print(info["score"]) - # Score: +20 + # Score: PovScore(Cp(+20), WHITE) board = chess.Board("r1bqkbnr/p1pp1ppp/1pn5/4p3/2B1P3/5Q2/PPPP1PPP/RNB1K1NR w KQkq - 2 4") info = await engine.analyse(board, chess.engine.Limit(depth=20)) print(info["score"]) - # Score: #+1 + # Score: PovScore(Mate(+1), WHITE) await engine.quit() From e559487a0d5378a4940dfb770e888884f21ed0ce Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 5 Nov 2020 22:02:55 +0100 Subject: [PATCH 085/613] Add GameNode.next() --- chess/pgn.py | 7 +++++++ test.py | 14 +++++++------- 2 files changed, 14 insertions(+), 7 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index 4f5b541b3..3458e4bff 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -436,6 +436,13 @@ def add_main_variation(self, move: chess.Move, *, comment: str = "") -> GameNode self.variations.insert(0, node) return node + def next(self) -> Optional[GameNode]: + """ + Returns the first node of the mainline after this node, or ``None`` if + this node does not have any children. + """ + return self.variations[0] if self.variations else None + def mainline(self) -> Mainline[GameNode]: """Returns an iterable over the mainline starting after this node.""" return Mainline(self, lambda node: node) diff --git a/test.py b/test.py index 9762a4fdc..864bb6063 100755 --- a/test.py +++ b/test.py @@ -2383,11 +2383,11 @@ def test_tricky_skip_game(self): self.assertEqual(len(offsets), 3) pgn.seek(offsets[0]) - self.assertEqual(chess.pgn.read_game(pgn).variations[0].move, chess.Move.from_uci("a2a3")) + self.assertEqual(chess.pgn.read_game(pgn).next().move, chess.Move.from_uci("a2a3")) pgn.seek(offsets[1]) - self.assertEqual(chess.pgn.read_game(pgn).variations[0].move, chess.Move.from_uci("b2b3")) + self.assertEqual(chess.pgn.read_game(pgn).next().move, chess.Move.from_uci("b2b3")) pgn.seek(offsets[2]) - self.assertEqual(chess.pgn.read_game(pgn).variations[0].move, chess.Move.from_uci("d2d3")) + self.assertEqual(chess.pgn.read_game(pgn).next().move, chess.Move.from_uci("d2d3")) self.assertEqual(chess.pgn.read_game(pgn), None) def test_read_headers(self): @@ -2510,7 +2510,7 @@ def test_chessbase_empty_line(self): game = chess.pgn.read_game(pgn) self.assertEqual(game.headers["Event"], "AlphaZero vs. Stockfish") self.assertEqual(game.headers["Round"], "1") - self.assertEqual(game.variations[0].move, chess.Move.from_uci("e2e4")) + self.assertEqual(game.next().move, chess.Move.from_uci("e2e4")) self.assertTrue(chess.pgn.read_game(pgn) is None) @@ -2621,7 +2621,7 @@ def test_wierd_header(self): def test_semicolon_comment(self): pgn = io.StringIO("1. e4 ; e5") game = chess.pgn.read_game(pgn) - node = game.variations[0] + node = game.next() self.assertEqual(node.move, chess.Move.from_uci("e2e4")) self.assertTrue(node.is_end()) @@ -2648,10 +2648,10 @@ def test_no_movetext(self): def test_subgame(self): pgn = io.StringIO("1. d4 d5 (1... Nf6 2. c4 (2. Nf3 g6 3. g3))") game = chess.pgn.read_game(pgn) - node = game.variations[0].variations[1] + node = game.next().variations[1] subgame = node.accept_subgame(chess.pgn.GameBuilder()) self.assertEqual(subgame.headers["FEN"], "rnbqkb1r/pppppppp/5n2/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq - 1 2") - self.assertEqual(subgame.variations[0].move, chess.Move.from_uci("c2c4")) + self.assertEqual(subgame.next().move, chess.Move.from_uci("c2c4")) self.assertEqual(subgame.variations[1].move, chess.Move.from_uci("g1f3")) def test_is_wild(self): From 8546224a705de4ddfed4f602fd7b07a19e1c8e12 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 12:18:25 +0100 Subject: [PATCH 086/613] Add chess.ray(a, b) for consistency --- chess/__init__.py | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index 2fd5cb15b..fa312274e 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -393,6 +393,9 @@ def _rays() -> List[List[Bitboard]]: BB_RAYS = _rays() +def ray(a: Square, b: Square) -> Bitboard: + return BB_RAYS[a][b] + def between(a: Square, b: Square) -> Bitboard: bb = BB_RAYS[a][b] & ((BB_ALL << a) ^ (BB_ALL << b)) return bb & (bb - 1) @@ -759,7 +762,7 @@ def pin_mask(self, color: Color, square: Square) -> Bitboard: snipers = rays & sliders & self.occupied_co[not color] for sniper in scan_reversed(snipers): if between(sniper, king) & (self.occupied | square_mask) == square_mask: - return BB_RAYS[king][sniper] + return ray(king, sniper) break @@ -3419,14 +3422,14 @@ def _is_safe(self, king: Square, blockers: Bitboard, move: Move) -> bool: not self._ep_skewered(king, move.from_square)) else: return bool(not blockers & BB_SQUARES[move.from_square] or - BB_RAYS[move.from_square][move.to_square] & BB_SQUARES[king]) + ray(move.from_square, move.to_square) & BB_SQUARES[king]) def _generate_evasions(self, king: Square, checkers: Bitboard, from_mask: Bitboard = BB_ALL, to_mask: Bitboard = BB_ALL) -> Iterator[Move]: sliders = checkers & (self.bishops | self.rooks | self.queens) attacked = 0 for checker in scan_reversed(sliders): - attacked |= BB_RAYS[king][checker] & ~BB_SQUARES[checker] + attacked |= ray(king, checker) & ~BB_SQUARES[checker] if BB_SQUARES[king] & from_mask: for to_square in scan_reversed(BB_KING_ATTACKS[king] & ~self.occupied_co[self.turn] & ~attacked & to_mask): @@ -4017,7 +4020,7 @@ def ray(cls, a: Square, b: Square) -> SquareSet: . . . . 1 . . . . . . . . 1 . . """ - return cls(BB_RAYS[a][b]) + return cls(ray(a, b)) @classmethod def between(cls, a: Square, b: Square) -> SquareSet: From 165cfd3d181f1e85a00c81936d178d6d95350969 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 13:33:39 +0100 Subject: [PATCH 087/613] Introduce chess.pgn.ChildNode --- chess/pgn.py | 145 ++++++++++++++++++++++++++------------------------- test.py | 8 +-- 2 files changed, 79 insertions(+), 74 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index 3458e4bff..ae4f9e4e4 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -161,7 +161,6 @@ def __init__(self, node: GameNode, *, is_variation: bool = False, sidelines: boo class GameNode: - parent: Optional[GameNode] """ The parent node or ``None`` if this is the root node of the game. @@ -173,11 +172,8 @@ class GameNode: game. """ - nags: Set[int] - """ - A set of NAGs as integers. NAGs always go behind a move, so the root - node of the game will never have NAGs. - """ + variations: List[ChildNode] + """A list of child nodes.""" comment: str """ @@ -186,31 +182,19 @@ class GameNode: """ starting_comment: str - """ - A comment for the start of a variation. Only nodes that - actually start a variation (:func:`~chess.pgn.GameNode.starts_variation()` - checks this) can have a starting comment. The root node can not have - a starting comment. - """ - - variations: List[GameNode] - """A list of child nodes.""" + nags: Set[int] - def __init__(self) -> None: + def __init__(self, *, comment: str = "") -> None: self.parent = None + self.move = None self.variations = [] + self.comment = comment - self.move = None - self.nags = set() self.starting_comment = "" - self.comment = "" + self.nags = set() self.board_cached: Optional[weakref.ref[chess.Board]] = None - @classmethod - def dangling_node(cls) -> GameNode: - return GameNode() - def _board(self) -> chess.Board: assert False, "cannot get board of dangling GameNode" @@ -250,10 +234,6 @@ def board(self) -> chess.Board: return board - def _move(self) -> chess.Move: - assert self.move is not None, "cannot get move of dangling GameNode" - return self.move - def _ply(self) -> int: assert False, "cannot get ply of dangling GameNode" @@ -279,26 +259,6 @@ def turn(self) -> Color: """ return self.ply() % 2 == 0 - def san(self) -> str: - """ - Gets the standard algebraic notation of the move leading to this node. - See :func:`chess.Board.san()`. - - Do not call this on the root node. - """ - assert self.parent is not None and self.move is not None, "cannot get san of dangling GameNode" - return self.parent.board().san(self.move) - - def uci(self, *, chess960: Optional[bool] = None) -> str: - """ - Gets the UCI notation of the move leading to this node. - See :func:`chess.Board.uci()`. - - Do not call this on the root node. - """ - assert self.parent is not None and self.move is not None, "cannot get uci of dangling GameNode" - return self.parent.board().uci(self.move, chess960=chess960) - def root(self) -> GameNode: node = self while node.parent: @@ -362,7 +322,7 @@ def is_main_variation(self) -> bool: return not self.parent.variations or self.parent.variations[0] == self - def __getitem__(self, move: Union[int, chess.Move, GameNode]) -> GameNode: + def __getitem__(self, move: Union[int, chess.Move, GameNode]) -> ChildNode: try: return self.variations[move] # type: ignore except TypeError: @@ -380,7 +340,7 @@ def __contains__(self, move: Union[int, chess.Move, GameNode]) -> bool: else: return True - def variation(self, move: Union[int, chess.Move, GameNode]) -> GameNode: + def variation(self, move: Union[int, chess.Move, GameNode]) -> ChildNode: """ Gets a child node by either the move or the variation index. """ @@ -414,42 +374,34 @@ def remove_variation(self, move: Union[int, chess.Move, GameNode]) -> None: """Removes a variation.""" self.variations.remove(self.variation(move)) - def add_variation(self, move: chess.Move, *, comment: str = "", starting_comment: str = "", nags: Iterable[int] = []) -> GameNode: + def add_variation(self, move: chess.Move, *, comment: str = "", starting_comment: str = "", nags: Iterable[int] = []) -> ChildNode: """Creates a child node with the given attributes.""" - node = type(self).dangling_node() - node.move = move - node.nags = set(nags) - node.comment = comment - node.starting_comment = starting_comment - - node.parent = self - self.variations.append(node) - return node + return ChildNode(self, move, comment=comment, starting_comment=starting_comment, nags=nags) - def add_main_variation(self, move: chess.Move, *, comment: str = "") -> GameNode: + def add_main_variation(self, move: chess.Move, *, comment: str = "", nags: Iterable[int] = []) -> ChildNode: """ Creates a child node with the given attributes and promotes it to the main variation. """ - node = self.add_variation(move, comment=comment) + node = self.add_variation(move, comment=comment, nags=nags) self.variations.remove(node) self.variations.insert(0, node) return node - def next(self) -> Optional[GameNode]: + def next(self) -> Optional[ChildNode]: """ Returns the first node of the mainline after this node, or ``None`` if this node does not have any children. """ return self.variations[0] if self.variations else None - def mainline(self) -> Mainline[GameNode]: + def mainline(self) -> Mainline[ChildNode]: """Returns an iterable over the mainline starting after this node.""" return Mainline(self, lambda node: node) def mainline_moves(self) -> Mainline[chess.Move]: """Returns an iterable over the main moves after this node.""" - return Mainline(self, lambda node: node._move()) + return Mainline(self, lambda node: node.move) def add_line(self, moves: Iterable[chess.Move], *, comment: str = "", starting_comment: str = "", nags: Iterable[int] = []) -> GameNode: """ @@ -687,9 +639,60 @@ def __str__(self) -> str: return self.accept(StringExporter(columns=None)) def __repr__(self) -> str: - if self.parent is None: - return f"<{type(self).__name__} at {id(self):#x} (dangling: {self.move})>" + return f"<{type(self).__name__} at {id(self):#x} (dangling)>" + + +class ChildNode(GameNode): + parent: GameNode + move: chess.Move + + nags: Set[int] + """ + A set of NAGs as integers. NAGs always go behind a move, so the root + node of the game will never have NAGs. + """ + + starting_comment: str + """ + A comment for the start of a variation. Only nodes that + actually start a variation (:func:`~chess.pgn.GameNode.starts_variation()` + checks this) can have a starting comment. The root node can not have + a starting comment. + """ + + def __init__(self, parent: GameNode, move: chess.Move, *, comment: str = "", starting_comment: str = "", nags: Iterable[int] = []) -> None: + super().__init__(comment=comment) + self.parent = parent + self.move = move + self.parent.variations.append(self) + + self.nags.update(nags) + self.starting_comment = starting_comment + def san(self) -> str: + """ + Gets the standard algebraic notation of the move leading to this node. + See :func:`chess.Board.san()`. + + Do not call this on the root node. + """ + assert self.parent is not None and self.move is not None, "cannot get san of dangling GameNode" + return self.parent.board().san(self.move) + + def uci(self, *, chess960: Optional[bool] = None) -> str: + """ + Gets the UCI notation of the move leading to this node. + See :func:`chess.Board.uci()`. + + Do not call this on the root node. + """ + assert self.parent is not None and self.move is not None, "cannot get uci of dangling GameNode" + return self.parent.board().uci(self.move, chess960=chess960) + + def end(self) -> ChildNode: + return typing.cast(ChildNode, super().end()) + + def __repr__(self) -> str: try: parent_board = self.parent.board() except ValueError: @@ -927,7 +930,7 @@ def builder(cls: Type[HeadersT]) -> HeadersBuilder[HeadersT]: MainlineMapT = TypeVar("MainlineMapT") class Mainline(Generic[MainlineMapT]): - def __init__(self, start: GameNode, f: Callable[[GameNode], MainlineMapT]) -> None: + def __init__(self, start: GameNode, f: Callable[[ChildNode], MainlineMapT]) -> None: self.start = start self.f = f @@ -949,7 +952,7 @@ def accept(self, visitor: BaseVisitor[ResultT]) -> ResultT: while node.variations: node = node.variations[0] node._accept_node(board, visitor) - board.push(node._move()) + board.push(node.move) return visitor.result() def __str__(self) -> str: @@ -960,7 +963,7 @@ def __repr__(self) -> str: class ReverseMainline(Generic[MainlineMapT]): - def __init__(self, stop: GameNode, f: Callable[[GameNode], MainlineMapT]) -> None: + def __init__(self, stop: GameNode, f: Callable[[ChildNode], MainlineMapT]) -> None: self.stop = stop self.f = f @@ -977,7 +980,7 @@ def __len__(self) -> int: def __iter__(self) -> Iterator[MainlineMapT]: node = self.end while node.parent and node != self.stop: - yield self.f(node) + yield self.f(typing.cast(ChildNode, node)) node = node.parent def __reversed__(self) -> Mainline[MainlineMapT]: @@ -986,7 +989,7 @@ def __reversed__(self) -> Mainline[MainlineMapT]: def __repr__(self) -> str: return "".format( id(self), - " ".join(ReverseMainline(self.stop, lambda node: node._move().uci()))) + " ".join(ReverseMainline(self.stop, lambda node: node.move.uci()))) class BaseVisitor(abc.ABC, Generic[ResultT]): diff --git a/test.py b/test.py index 864bb6063..fc22dfab8 100755 --- a/test.py +++ b/test.py @@ -2661,9 +2661,11 @@ def test_is_wild(self): def test_my_game_node(self): class MyGameNode(chess.pgn.GameNode): - @classmethod - def dangling_node(cls): - return MyGameNode() + def add_variation(self, move, *, comment="", starting_comment="", nags=[]): + return MyChildNode(self, move, comment=comment, starting_comment=starting_comment, nags=nags) + + class MyChildNode(chess.pgn.ChildNode, MyGameNode): + pass class MyGame(chess.pgn.Game, MyGameNode): pass From 007127635861b659e6d7692a85cae6260d803651 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 15:44:18 +0100 Subject: [PATCH 088/613] Use types to eliminate dangling game nodes --- chess/pgn.py | 190 +++++++++++++++++++++++---------------------------- 1 file changed, 86 insertions(+), 104 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index ae4f9e4e4..7b0bdf3fd 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -151,8 +151,7 @@ class SkipType(enum.Enum): class _AcceptFrame: - def __init__(self, node: GameNode, *, is_variation: bool = False, sidelines: bool = True): - assert node.parent is not None, "cannot visit dangling GameNode" + def __init__(self, node: ChildNode, *, is_variation: bool = False, sidelines: bool = True): self.state = "pre" self.node = node self.is_variation = is_variation @@ -160,7 +159,7 @@ def __init__(self, node: GameNode, *, is_variation: bool = False, sidelines: boo self.in_variation = False -class GameNode: +class GameNode(abc.ABC): parent: Optional[GameNode] """ The parent node or ``None`` if this is the root node of the game. @@ -190,14 +189,12 @@ def __init__(self, *, comment: str = "") -> None: self.variations = [] self.comment = comment + # Deprecated: These should be properties of ChildNode, but need to + # remain here for backwards compatibility. self.starting_comment = "" self.nags = set() - self.board_cached: Optional[weakref.ref[chess.Board]] = None - - def _board(self) -> chess.Board: - assert False, "cannot get board of dangling GameNode" - + @abc.abstractmethod def board(self) -> chess.Board: """ Gets a board with the position of the node. @@ -207,36 +204,8 @@ def board(self) -> chess.Board: It's a copy, so modifying the board will not alter the game. """ - if self.board_cached is not None: - board_cached = self.board_cached() - if board_cached is not None: - return board_cached.copy() - - stack = [] - node = self - while True: - if node.parent is None or node.move is None: - board = node._board() - break - elif node.board_cached is not None: - board_cached = node.board_cached() - if board_cached is not None: - board = board_cached.copy() - break - stack.append(node.move) - node = node.parent - - while stack: - board.push(stack.pop()) - - if self.parent is not None: - self.board_cached = weakref.ref(board) - - return board - - def _ply(self) -> int: - assert False, "cannot get ply of dangling GameNode" + @abc.abstractmethod def ply(self) -> int: """ Returns the number of half-moves up to this node, as indicated by @@ -246,12 +215,6 @@ def ply(self) -> int: Usually this is equal to the number of parent nodes, but it may be more if the game was started from a custom position. """ - ply = 0 - node = self - while node.parent is not None: - ply += 1 - node = node.parent - return node._ply() + ply def turn(self) -> Color: """ @@ -384,8 +347,7 @@ def add_main_variation(self, move: chess.Move, *, comment: str = "", nags: Itera main variation. """ node = self.add_variation(move, comment=comment, nags=nags) - self.variations.remove(node) - self.variations.insert(0, node) + self.variations.insert(0, self.variations.pop()) return node def next(self) -> Optional[ChildNode]: @@ -543,66 +505,12 @@ def set_clock(self, seconds: Optional[float]) -> None: self.comment += " " self.comment += clk - def _accept_node(self, parent_board: chess.Board, visitor: BaseVisitor[ResultT]) -> None: - assert self.move is not None, "cannot visit dangling GameNode" - - if self.starting_comment: - visitor.visit_comment(self.starting_comment) - - visitor.visit_move(parent_board, self.move) - - parent_board.push(self.move) - visitor.visit_board(parent_board) - parent_board.pop() - - for nag in sorted(self.nags): - visitor.visit_nag(nag) - - if self.comment: - visitor.visit_comment(self.comment) - - def _accept(self, parent_board: chess.Board, visitor: BaseVisitor[ResultT], *, sidelines: bool = True) -> None: - stack = [_AcceptFrame(self, sidelines=sidelines)] - - while stack: - top = stack[-1] - - if top.in_variation: - top.in_variation = False - visitor.end_variation() - - if top.state == "pre": - top.node._accept_node(parent_board, visitor) - top.state = "variations" - elif top.state == "variations": - try: - variation = next(top.variations) - except StopIteration: - if top.node.variations: - assert top.node.move is not None, "root node cannot be a variation" - parent_board.push(top.node.move) - stack.append(_AcceptFrame(top.node.variations[0], sidelines=True)) - top.state = "post" - else: - top.state = "end" - else: - if visitor.begin_variation() is not SKIP: - stack.append(_AcceptFrame(variation, sidelines=False, is_variation=True)) - top.in_variation = True - elif top.state == "post": - parent_board.pop() - top.state = "end" - else: - stack.pop() - + @abc.abstractmethod def accept(self, visitor: BaseVisitor[ResultT]) -> ResultT: """ Traverses game nodes in PGN order using the given *visitor*. Starts with the move leading to this node. Returns the *visitor* result. """ - assert self.parent is not None, "cannot visit dangling GameNode" - self._accept(self.parent.board(), visitor, sidelines=False) - return visitor.result() def accept_subgame(self, visitor: BaseVisitor[ResultT]) -> ResultT: """ @@ -669,6 +577,29 @@ def __init__(self, parent: GameNode, move: chess.Move, *, comment: str = "", sta self.nags.update(nags) self.starting_comment = starting_comment + def board(self) -> chess.Board: + stack: List[chess.Move] = [] + node: GameNode = self + + while node.move is not None and node.parent is not None: + stack.append(node.move) + node = node.parent + + board = node.game().board() + + while stack: + board.push(stack.pop()) + + return board + + def ply(self) -> int: + ply = 0 + node: GameNode = self + while node.parent is not None: + ply += 1 + node = node.parent + return node.game().ply() + ply + def san(self) -> str: """ Gets the standard algebraic notation of the move leading to this node. @@ -676,7 +607,6 @@ def san(self) -> str: Do not call this on the root node. """ - assert self.parent is not None and self.move is not None, "cannot get san of dangling GameNode" return self.parent.board().san(self.move) def uci(self, *, chess960: Optional[bool] = None) -> str: @@ -686,12 +616,64 @@ def uci(self, *, chess960: Optional[bool] = None) -> str: Do not call this on the root node. """ - assert self.parent is not None and self.move is not None, "cannot get uci of dangling GameNode" return self.parent.board().uci(self.move, chess960=chess960) def end(self) -> ChildNode: return typing.cast(ChildNode, super().end()) + def _accept_node(self, parent_board: chess.Board, visitor: BaseVisitor[ResultT]) -> None: + if self.starting_comment: + visitor.visit_comment(self.starting_comment) + + visitor.visit_move(parent_board, self.move) + + parent_board.push(self.move) + visitor.visit_board(parent_board) + parent_board.pop() + + for nag in sorted(self.nags): + visitor.visit_nag(nag) + + if self.comment: + visitor.visit_comment(self.comment) + + def _accept(self, parent_board: chess.Board, visitor: BaseVisitor[ResultT], *, sidelines: bool = True) -> None: + stack = [_AcceptFrame(self, sidelines=sidelines)] + + while stack: + top = stack[-1] + + if top.in_variation: + top.in_variation = False + visitor.end_variation() + + if top.state == "pre": + top.node._accept_node(parent_board, visitor) + top.state = "variations" + elif top.state == "variations": + try: + variation = next(top.variations) + except StopIteration: + if top.node.variations: + parent_board.push(top.node.move) + stack.append(_AcceptFrame(top.node.variations[0], sidelines=True)) + top.state = "post" + else: + top.state = "end" + else: + if visitor.begin_variation() is not SKIP: + stack.append(_AcceptFrame(variation, sidelines=False, is_variation=True)) + top.in_variation = True + elif top.state == "post": + parent_board.pop() + top.state = "end" + else: + stack.pop() + + def accept(self, visitor: BaseVisitor[ResultT]) -> ResultT: + self._accept(self.parent.board(), visitor, sidelines=False) + return visitor.result() + def __repr__(self) -> str: try: parent_board = self.parent.board() @@ -738,10 +720,10 @@ def __init__(self, headers: Optional[Union[Mapping[str, str], Iterable[Tuple[str self.headers = Headers(headers) self.errors = [] - def _board(self) -> chess.Board: + def board(self) -> chess.Board: return self.headers.board() - def _ply(self) -> int: + def ply(self) -> int: # Optimization: Parse FEN only for custom starting positions. return self.board().ply() if "FEN" in self.headers else 0 From 7d27164028bfa3d76ac44be106fba78ef5bc40a8 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 16:11:18 +0100 Subject: [PATCH 089/613] Update GameModel documentation --- chess/pgn.py | 28 +++++++++++++++++----------- docs/pgn.rst | 18 +++++++++++------- 2 files changed, 28 insertions(+), 18 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index 7b0bdf3fd..76a56921e 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -161,9 +161,7 @@ def __init__(self, node: ChildNode, *, is_variation: bool = False, sidelines: bo class GameNode(abc.ABC): parent: Optional[GameNode] - """ - The parent node or ``None`` if this is the root node of the game. - """ + """The parent node or ``None`` if this is the root node of the game.""" move: Optional[chess.Move] """ @@ -551,15 +549,17 @@ def __repr__(self) -> str: class ChildNode(GameNode): - parent: GameNode - move: chess.Move - - nags: Set[int] """ - A set of NAGs as integers. NAGs always go behind a move, so the root - node of the game will never have NAGs. + A child node of a game, with the move leading to it. + Extends :class:`~chess.pgn.GameNode`. """ + parent: GameNode + """The parent node.""" + + move: chess.Move + """The move leading to this node.""" + starting_comment: str """ A comment for the start of a variation. Only nodes that @@ -568,6 +568,12 @@ class ChildNode(GameNode): a starting comment. """ + nags: Set[int] + """ + A set of NAGs as integers. NAGs always go behind a move, so the root + node of the game will never have NAGs. + """ + def __init__(self, parent: GameNode, move: chess.Move, *, comment: str = "", starting_comment: str = "", nags: Iterable[int] = []) -> None: super().__init__(comment=comment) self.parent = parent @@ -619,6 +625,7 @@ def uci(self, *, chess960: Optional[bool] = None) -> str: return self.parent.board().uci(self.move, chess960=chess960) def end(self) -> ChildNode: + """Follows the main variation to the end and returns the last node.""" return typing.cast(ChildNode, super().end()) def _accept_node(self, parent_board: chess.Board, visitor: BaseVisitor[ResultT]) -> None: @@ -693,8 +700,7 @@ def __repr__(self) -> str: class Game(GameNode): """ The root node of a game with extra information such as headers and the - starting position. Also has all the other properties and methods of - :class:`~chess.pgn.GameNode`. + starting position. Extends :class:`~chess.pgn.GameNode`. """ headers: Headers diff --git a/docs/pgn.rst b/docs/pgn.rst index a1307795b..12b09ac62 100644 --- a/docs/pgn.rst +++ b/docs/pgn.rst @@ -42,17 +42,21 @@ Use the :class:`~chess.pgn.StringExporter()` or Game model ---------- -Games are represented as a tree of moves. Each :class:`~chess.pgn.GameNode` can have extra -information, such as comments. The root node of a game -(:class:`~chess.pgn.Game` extends the :class:`~chess.pgn.GameNode`) also -holds general information, such as game headers. - -.. autoclass:: chess.pgn.Game - :members: +Games are represented as a tree of moves. Conceptually each node represents a +position of the game. The tree consists of one root node +(:class:`~chess.pgn.Game`, also holding game headers) and many child +nodes (:class:`~chess.pgn.ChildNode`). +Both extend :class:`~chess.pgn.GameNode`. .. autoclass:: chess.pgn.GameNode :members: +.. autoclass:: chess.pgn.Game + :members: headers, errors, setup, accept + +.. autoclass:: chess.pgn.ChildNode + :members: parent, move, starting_comment, nags, san, uci, end + Visitors -------- From e9103b9dbec32c2c7dac64770925d7176eaddbee Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 16:26:19 +0100 Subject: [PATCH 090/613] Update changelog --- CHANGELOG.rst | 36 +++++++++++++++++++++++++++++------- chess/pgn.py | 6 ++---- 2 files changed, 31 insertions(+), 11 deletions(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index d18075674..426ea5c64 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,6 +1,26 @@ Changelog for python-chess ========================== +Upcoming in v1.3.0 +------------------ + +Changes: + +* Introduced ``chess.pgn.ChildNode``, a subclass of ``chess.pgn.GameNode`` + for all nodes other than the root node, and converted ``chess.pgn.GameNode`` + to an abstract base class. This improves ergonomics in typed code. + + The change is backwards compatible if using only documented features. + However, a notable undocumented feature is the ability to create dangling + nodes. This is no longer possible. If you have been using this for + subclassing, override ``GameNode.add_variation()`` instead of + ``GameNode.danling_node()``. It is now the only method that creates child + nodes. + +New features: + +* Added ``GameNode.next()``. + New in v1.2.2 ------------- @@ -12,14 +32,16 @@ Bugfixes: New in v1.2.1 ------------- -The primary location for the published package is now -https://pypi.org/project/chess/. Thanks to -`Kristian Glass `_ for transferring the -namespace. +Changes: + +* The primary location for the published package is now + https://pypi.org/project/chess/. Thanks to + `Kristian Glass `_ for transferring the + namespace. -The old https://pypi.org/project/python-chess/ will remain an alias that -installs the package from the new location as a dependency (as recommended by -`PEP423 `_). + The old https://pypi.org/project/python-chess/ will remain an alias that + installs the package from the new location as a dependency (as recommended by + `PEP423 `_). New in v1.2.0 ------------- diff --git a/chess/pgn.py b/chess/pgn.py index 76a56921e..01b63eb9b 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -337,6 +337,7 @@ def remove_variation(self, move: Union[int, chess.Move, GameNode]) -> None: def add_variation(self, move: chess.Move, *, comment: str = "", starting_comment: str = "", nags: Iterable[int] = []) -> ChildNode: """Creates a child node with the given attributes.""" + # Instanciate ChildNode only in this method. return ChildNode(self, move, comment=comment, starting_comment=starting_comment, nags=nags) def add_main_variation(self, move: chess.Move, *, comment: str = "", nags: Iterable[int] = []) -> ChildNode: @@ -544,9 +545,6 @@ def accept_subgame(self, visitor: BaseVisitor[ResultT]) -> ResultT: def __str__(self) -> str: return self.accept(StringExporter(columns=None)) - def __repr__(self) -> str: - return f"<{type(self).__name__} at {id(self):#x} (dangling)>" - class ChildNode(GameNode): """ @@ -692,7 +690,7 @@ def __repr__(self) -> str: id(self), parent_board.fullmove_number, "." if parent_board.turn == chess.WHITE else "...", - self.san()) + parent_board.san(self.move)) GameT = TypeVar("GameT", bound="Game") From 81575406805818cfc9ba70256d90b80e1a9330d5 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 16:36:12 +0100 Subject: [PATCH 091/613] Mention change to GameNode.board() caching --- CHANGELOG.rst | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 426ea5c64..a335aeed8 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -14,12 +14,16 @@ Changes: However, a notable undocumented feature is the ability to create dangling nodes. This is no longer possible. If you have been using this for subclassing, override ``GameNode.add_variation()`` instead of - ``GameNode.danling_node()``. It is now the only method that creates child + ``GameNode.dangling_node()``. It is now the only method that creates child nodes. +Bugfixes: + +* Removed broken ``weakref`` based caching in ``chess.pgn.GameNode.board()``. + New features: -* Added ``GameNode.next()``. +* Added ``chess.pgn.GameNode.next()``. New in v1.2.2 ------------- From 69ce173743808bf528dab1d582c68b703b29db5e Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 16:46:19 +0100 Subject: [PATCH 092/613] Prepare 1.3.0 --- CHANGELOG.rst | 4 ++-- chess/__init__.py | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index a335aeed8..24070369d 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,8 +1,8 @@ Changelog for python-chess ========================== -Upcoming in v1.3.0 ------------------- +New in v1.3.0 +------------- Changes: diff --git a/chess/__init__.py b/chess/__init__.py index fa312274e..526494217 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -26,7 +26,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.2.2" +__version__ = "1.3.0" import collections import copy From 18adf53b6716090420ac2160f9332aa23963c1a3 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 20:48:25 +0100 Subject: [PATCH 093/613] Start porting CI to Github Actions --- .github/workflows/test.yml | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 .github/workflows/test.yml diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml new file mode 100644 index 000000000..f153bf13b --- /dev/null +++ b/.github/workflows/test.yml @@ -0,0 +1,17 @@ +name: Test + +on: [push, pull_request] + +jobs: + test: + strategy: + matrix: + os: [ubuntu-latest, windows-latest] + python-version: [3.7, 3.8, 3.9] + runs-on: ${{ matrix.os }} + steps: + - uses: actions/checkout@v2 + - uses: actions/setup-python@v2 + with: + python-version: ${{ matrix.python-version }} + - run: python test.py -v From 861213f68bd4143186102a671e3f0f604a5482f8 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 20:58:18 +0100 Subject: [PATCH 094/613] Try to run perft tests on GitHub Actions --- .github/workflows/test.yml | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index f153bf13b..659316848 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -14,4 +14,20 @@ jobs: - uses: actions/setup-python@v2 with: python-version: ${{ matrix.python-version }} + - run: pip install -e . - run: python test.py -v + perft: + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v2 + - uses: actions/setup-python@v2 + with: + python-version: 3.9 + - run: pip install -e . + - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000 + - run: python examples/perft/perft.py -t 1 examples/perft/tricky.perft + - run: python examples/perft/perft.py -t 1 --variant giveaway examples/perft/giveaway.perft + - run: python examples/perft/perft.py -t 1 --variant atomic examples/perft/atomic.perft + - run: python examples/perft/perft.py -t 1 --variant racingkings examples/perft/racingkings.perft + - run: python examples/perft/perft.py -t 1 --variant horde examples/perft/horde.perft + - run: python examples/perft/perft.py -t 1 --variant crazyhouse examples/perft/crazyhouse.perft From d1b22313d4b617f5149673402561630f621b2fcc Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 21:03:29 +0100 Subject: [PATCH 095/613] Try to run mypy on Github Actions --- .github/workflows/test.yml | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index 659316848..acdb995e2 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -31,3 +31,17 @@ jobs: - run: python examples/perft/perft.py -t 1 --variant racingkings examples/perft/racingkings.perft - run: python examples/perft/perft.py -t 1 --variant horde examples/perft/horde.perft - run: python examples/perft/perft.py -t 1 --variant crazyhouse examples/perft/crazyhouse.perft + mypy: + strategy: + matrix: + python-version: [3.8, 3.9] + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v2 + - uses: actions/setup-python@v2 + with: + python-version: ${{ matrix.python-version }} + - run: pip install -e . + - run: pip install mypy + - run: python -m mypy --strict chess + - run: python -m mypy --strict examples/**/*.py From 01b7f035e1b4f6f1fa1014544ee72070be964c83 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 21:11:03 +0100 Subject: [PATCH 096/613] Check README.rst on GitHub Actions --- .github/workflows/test.yml | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index acdb995e2..3b4a48d0c 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -45,3 +45,17 @@ jobs: - run: pip install mypy - run: python -m mypy --strict chess - run: python -m mypy --strict examples/**/*.py + readme: + strategy: + matrix: + python-version: [3.7, 3.8, 3.9] + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v2 + - uses: actions/setup-python@v2 + with: + python-version: ${{ matrix.python-version }} + - run: sudo apt-get update && sudo apt-get install -y docutils-common + - run: python setup.py --long-description | rst2html --strict --no-raw > /dev/null + - run: pip install -e . + - run: python -m doctest README.rst From 62ba2c1f555c9ae2d2f5a3e15e1d2f912f828cc4 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 21:15:52 +0100 Subject: [PATCH 097/613] Update status badges --- README.rst | 20 ++++++-------------- 1 file changed, 6 insertions(+), 14 deletions(-) diff --git a/README.rst b/README.rst index 5319a9d86..62720b727 100644 --- a/README.rst +++ b/README.rst @@ -1,29 +1,21 @@ python-chess: a pure Python chess library ========================================= -.. image:: https://travis-ci.org/niklasf/python-chess.svg?branch=master - :target: https://travis-ci.org/niklasf/python-chess - :alt: build - -.. image:: https://ci.appveyor.com/api/projects/status/y9k3hdbm0f0nbum9/branch/master?svg=true - :target: https://ci.appveyor.com/project/niklasf/python-chess - :alt: appveyor build - -.. image:: https://coveralls.io/repos/github/niklasf/python-chess/badge.svg?branch=master - :target: https://coveralls.io/github/niklasf/python-chess?branch=master - :alt: coverage +.. image:: https://github.com/niklasf/python-chess/workflows/Test/badge.svg + :target: https://github.com/niklasf/python-chess/actions + :alt: Test status .. image:: https://badge.fury.io/py/chess.svg :target: https://pypi.python.org/pypi/chess - :alt: pypi package + :alt: PyPI package .. image:: https://readthedocs.org/projects/python-chess/badge/?version=latest :target: https://python-chess.readthedocs.io/en/latest/ - :alt: docs + :alt: Docs .. image:: https://badges.gitter.im/python-chess/community.svg :target: https://gitter.im/python-chess/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge - :alt: chat on gitter + :alt: Chat on Gitter Introduction ------------ From e054c688036f8f68cb6c129c1609c38d87da764b Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 21:28:02 +0100 Subject: [PATCH 098/613] Try to set up test dependencies on Github Actions --- .github/workflows/setup-ubuntu-latest.sh | 33 +++++++++++++++++++++++ .github/workflows/setup-windows-latest.sh | 0 .github/workflows/test.yml | 2 ++ 3 files changed, 35 insertions(+) create mode 100755 .github/workflows/setup-ubuntu-latest.sh create mode 100755 .github/workflows/setup-windows-latest.sh diff --git a/.github/workflows/setup-ubuntu-latest.sh b/.github/workflows/setup-ubuntu-latest.sh new file mode 100755 index 000000000..7383823ec --- /dev/null +++ b/.github/workflows/setup-ubuntu-latest.sh @@ -0,0 +1,33 @@ +#!/bin/sh + +# Stockfish +wget https://stockfish.s3.amazonaws.com/stockfish-11-linux.zip +unzip stockfish-11-linux.zip +mkdir -p bin +cp stockfish-11-linux/Linux/stockfish_20011801_x64_bmi2 bin/stockfish +chmod +x bin/stockfish +echo "`pwd`/bin" >> $GITHUB_PATH + +# Crafty +git clone https://github.com/lazydroid/crafty-chess +cd crafty-chess +make unix-gcc +pwd >> $GITHUB_PATH +cd .. + +# Gaviota libgtb +git clone https://github.com/michiguel/Gaviota-Tablebases.git --depth 1 +cd Gaviota-Tablebases +make +echo "::set-env LD_LIBRARY_PATH=`pwd`:${LD_LIBRARY_PATH}" +cd .. + +# Gaviota tablebases +#cd data/gaviota +#travis_wait wget --no-verbose --no-check-certificate --no-clobber --input-file TEST-SOURCE.txt +#cd ../.. + +# Suicide syzygy bases +#cd data/syzygy/suicide +#travis_wait wget --no-verbose --no-check-certificate --no-clobber --input-file TEST-SOURCE.txt +#cd ../../.. diff --git a/.github/workflows/setup-windows-latest.sh b/.github/workflows/setup-windows-latest.sh new file mode 100755 index 000000000..e69de29bb diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index 3b4a48d0c..166f62e43 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -14,6 +14,7 @@ jobs: - uses: actions/setup-python@v2 with: python-version: ${{ matrix.python-version }} + - run: .github/workflows/setup-${{ matrix.os }}.sh - run: pip install -e . - run: python test.py -v perft: @@ -58,4 +59,5 @@ jobs: - run: sudo apt-get update && sudo apt-get install -y docutils-common - run: python setup.py --long-description | rst2html --strict --no-raw > /dev/null - run: pip install -e . + - run: .github/workflows/setup-ubuntu-latest.sh - run: python -m doctest README.rst From 4fff76bd86746d2c24046e3bc6c09d6b8cba0689 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 21:34:17 +0100 Subject: [PATCH 099/613] Final attempt to setup libgtb --- .github/workflows/setup-ubuntu-latest.sh | 16 +++------------- 1 file changed, 3 insertions(+), 13 deletions(-) diff --git a/.github/workflows/setup-ubuntu-latest.sh b/.github/workflows/setup-ubuntu-latest.sh index 7383823ec..de1d567fd 100755 --- a/.github/workflows/setup-ubuntu-latest.sh +++ b/.github/workflows/setup-ubuntu-latest.sh @@ -1,4 +1,4 @@ -#!/bin/sh +#!/bin/sh -e # Stockfish wget https://stockfish.s3.amazonaws.com/stockfish-11-linux.zip @@ -9,7 +9,7 @@ chmod +x bin/stockfish echo "`pwd`/bin" >> $GITHUB_PATH # Crafty -git clone https://github.com/lazydroid/crafty-chess +git clone https://github.com/lazydroid/crafty-chess --depth 1 cd crafty-chess make unix-gcc pwd >> $GITHUB_PATH @@ -19,15 +19,5 @@ cd .. git clone https://github.com/michiguel/Gaviota-Tablebases.git --depth 1 cd Gaviota-Tablebases make -echo "::set-env LD_LIBRARY_PATH=`pwd`:${LD_LIBRARY_PATH}" +echo "LD_LIBRARY_PATH=`pwd`:${LD_LIBRARY_PATH}" >> $GITHUB_ENV cd .. - -# Gaviota tablebases -#cd data/gaviota -#travis_wait wget --no-verbose --no-check-certificate --no-clobber --input-file TEST-SOURCE.txt -#cd ../.. - -# Suicide syzygy bases -#cd data/syzygy/suicide -#travis_wait wget --no-verbose --no-check-certificate --no-clobber --input-file TEST-SOURCE.txt -#cd ../../.. From 542605ae77191be6b1249a7b43e5152e139ba9d8 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 21:37:10 +0100 Subject: [PATCH 100/613] Try to setup Stockfish for Windows in CI --- .github/workflows/setup-windows-latest.sh | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/.github/workflows/setup-windows-latest.sh b/.github/workflows/setup-windows-latest.sh index e69de29bb..22b7facb6 100755 --- a/.github/workflows/setup-windows-latest.sh +++ b/.github/workflows/setup-windows-latest.sh @@ -0,0 +1,6 @@ +#!/bin/sh -e + +wget https://stockfishchess.org/files/stockfish-11-win.zip +unzip stockfish-11-win.zip +mv stockfish-11-win/Windows/stockfish_20011801_x64_bmi2.exe stockfish.exe +pwd >> $GITHUB_PATH From 79c5ff77974787268feb1cf61232c3796579e29f Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 21:38:03 +0100 Subject: [PATCH 101/613] Multi-threaded perft in CI --- .github/workflows/test.yml | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index 166f62e43..7328d4292 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -25,13 +25,13 @@ jobs: with: python-version: 3.9 - run: pip install -e . - - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000 - - run: python examples/perft/perft.py -t 1 examples/perft/tricky.perft - - run: python examples/perft/perft.py -t 1 --variant giveaway examples/perft/giveaway.perft - - run: python examples/perft/perft.py -t 1 --variant atomic examples/perft/atomic.perft - - run: python examples/perft/perft.py -t 1 --variant racingkings examples/perft/racingkings.perft - - run: python examples/perft/perft.py -t 1 --variant horde examples/perft/horde.perft - - run: python examples/perft/perft.py -t 1 --variant crazyhouse examples/perft/crazyhouse.perft + - run: python examples/perft/perft.py -t 2 examples/perft/random.perft --max-nodes 10000 + - run: python examples/perft/perft.py -t 2 examples/perft/tricky.perft + - run: python examples/perft/perft.py -t 2 --variant giveaway examples/perft/giveaway.perft + - run: python examples/perft/perft.py -t 2 --variant atomic examples/perft/atomic.perft + - run: python examples/perft/perft.py -t 2 --variant racingkings examples/perft/racingkings.perft + - run: python examples/perft/perft.py -t 2 --variant horde examples/perft/horde.perft + - run: python examples/perft/perft.py -t 2 --variant crazyhouse examples/perft/crazyhouse.perft mypy: strategy: matrix: From 52c7e1bbd9de386b2d684e6bdca8cf5a19a733cd Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 21:41:19 +0100 Subject: [PATCH 102/613] Revert "Multi-threaded perft in CI" This reverts commit 79c5ff77974787268feb1cf61232c3796579e29f. --- .github/workflows/test.yml | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index 7328d4292..166f62e43 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -25,13 +25,13 @@ jobs: with: python-version: 3.9 - run: pip install -e . - - run: python examples/perft/perft.py -t 2 examples/perft/random.perft --max-nodes 10000 - - run: python examples/perft/perft.py -t 2 examples/perft/tricky.perft - - run: python examples/perft/perft.py -t 2 --variant giveaway examples/perft/giveaway.perft - - run: python examples/perft/perft.py -t 2 --variant atomic examples/perft/atomic.perft - - run: python examples/perft/perft.py -t 2 --variant racingkings examples/perft/racingkings.perft - - run: python examples/perft/perft.py -t 2 --variant horde examples/perft/horde.perft - - run: python examples/perft/perft.py -t 2 --variant crazyhouse examples/perft/crazyhouse.perft + - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000 + - run: python examples/perft/perft.py -t 1 examples/perft/tricky.perft + - run: python examples/perft/perft.py -t 1 --variant giveaway examples/perft/giveaway.perft + - run: python examples/perft/perft.py -t 1 --variant atomic examples/perft/atomic.perft + - run: python examples/perft/perft.py -t 1 --variant racingkings examples/perft/racingkings.perft + - run: python examples/perft/perft.py -t 1 --variant horde examples/perft/horde.perft + - run: python examples/perft/perft.py -t 1 --variant crazyhouse examples/perft/crazyhouse.perft mypy: strategy: matrix: From 956166e06356ea7a5e9d5338a3247b9178b2858d Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 21:43:10 +0100 Subject: [PATCH 103/613] Try to fix setup-windows-latest.sh --- .github/workflows/setup-windows-latest.sh | 10 ++++++++-- .github/workflows/test.yml | 1 + 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/.github/workflows/setup-windows-latest.sh b/.github/workflows/setup-windows-latest.sh index 22b7facb6..3ae917a5c 100755 --- a/.github/workflows/setup-windows-latest.sh +++ b/.github/workflows/setup-windows-latest.sh @@ -1,6 +1,12 @@ #!/bin/sh -e +echo Download ... +choco install wget wget https://stockfishchess.org/files/stockfish-11-win.zip -unzip stockfish-11-win.zip -mv stockfish-11-win/Windows/stockfish_20011801_x64_bmi2.exe stockfish.exe + +echo Unzip .. +7z e stockfish-11-win.zip stockfish-11-win/Windows/*.exe + +echo Setup path ... +mv stockfish_20011801_x64_bmi2.exe stockfish.exe pwd >> $GITHUB_PATH diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index 166f62e43..ad8e518b0 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -15,6 +15,7 @@ jobs: with: python-version: ${{ matrix.python-version }} - run: .github/workflows/setup-${{ matrix.os }}.sh + shell: bash - run: pip install -e . - run: python test.py -v perft: From 12c9a01f3f522e68b6e107b5e5c003f81edff368 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 6 Nov 2020 22:08:23 +0100 Subject: [PATCH 104/613] No longer need Travis and AppVeyor --- .travis.yml | 93 ---------------------------------------------------- appveyor.yml | 16 --------- 2 files changed, 109 deletions(-) delete mode 100644 .travis.yml delete mode 100644 appveyor.yml diff --git a/.travis.yml b/.travis.yml deleted file mode 100644 index 2e4ae2233..000000000 --- a/.travis.yml +++ /dev/null @@ -1,93 +0,0 @@ -dist: xenial -language: python -sudo: false -matrix: - include: - - python: "3.7" - - python: "3.8" - env: - - RUN_MYPY=1 - - python: "3.9-dev" - env: - - RUN_MYPY=1 - - RUN_PERFT=1 -cache: - directories: - - data/gaviota - - data/syzygy/suicide -before_cache: - - rm -f data/gaviota/travis_wait_*.log || true - - rm -f data/syzygy/suicide/travis_wait_*.log || true -before_install: - - | # Stockfish - wget https://stockfish.s3.amazonaws.com/stockfish-11-linux.zip - unzip stockfish-11-linux.zip - mkdir -p bin - cp stockfish-11-linux/Linux/stockfish_20011801_x64_bmi2 bin/stockfish - chmod +x bin/stockfish - export PATH="`pwd`/bin:${PATH}" - which stockfish || (echo $PATH && false) - - | # Crafty - git clone https://github.com/lazydroid/crafty-chess - cd crafty-chess - make unix-gcc - export PATH="`pwd`:${PATH}" - cd .. - - | # Gaviota libgtb - git clone https://github.com/michiguel/Gaviota-Tablebases.git --depth 1 - cd Gaviota-Tablebases - make - export LD_LIBRARY_PATH="`pwd`:${LD_LIBRARY_PATH}" - cd .. - - | # Gaviota tablebases - cd data/gaviota - travis_wait wget --no-verbose --no-check-certificate --no-clobber --input-file TEST-SOURCE.txt - cd ../.. - - | # Suicide syzygy bases - cd data/syzygy/suicide - travis_wait wget --no-verbose --no-check-certificate --no-clobber --input-file TEST-SOURCE.txt - cd ../../.. -install: - - pip install --upgrade pip wheel - - pip install --upgrade setuptools - - pip install --upgrade coveralls - - if [[ $RUN_MYPY -eq 1 ]]; then pip install --upgrade mypy; fi - - pip install -e . -script: - - # Unit tests - - coverage erase - - coverage run --source chess test.py -vv SquareTestCase - - coverage run --source chess --append test.py -vv MoveTestCase - - coverage run --source chess --append test.py -vv PieceTestCase - - coverage run --source chess --append test.py -vv BoardTestCase - - coverage run --source chess --append test.py -vv LegalMoveGeneratorTestCase - - coverage run --source chess --append test.py -vv BaseBoardTestCase - - coverage run --source chess --append test.py -vv SquareSetTestCase - - coverage run --source chess --append test.py -vv PolyglotTestCase - - coverage run --source chess --append test.py -vv PgnTestCase - - coverage run --source chess --append test.py -vv SyzygyTestCase - - coverage run --source chess --append test.py -vv NativeGaviotaTestCase - - coverage run --source chess --append test.py -vv GaviotaTestCase - - coverage run --source chess --append test.py -vv SvgTestCase - - coverage run --source chess --append test.py -vv SuicideTestCase - - coverage run --source chess --append test.py -vv AtomicTestCase - - coverage run --source chess --append test.py -vv RacingKingsTestCase - - coverage run --source chess --append test.py -vv HordeTestCase - - coverage run --source chess --append test.py -vv ThreeCheckTestCase - - coverage run --source chess --append test.py -vv CrazyhouseTestCase - - coverage run --source chess --append test.py -vv GiveawayTestCase - - coverage run --source chess --append test.py -vv EngineTestCase - - coverage run --source chess --append -m doctest README.rst --verbose - - echo Unit tests complete - - coveralls || [[ $? -eq 139 ]] - - # Typing - - if [[ $RUN_MYPY -eq 1 ]]; then python -m mypy --strict chess; fi - - if [[ $RUN_MYPY -eq 1 ]]; then python -m mypy --strict examples/**/*.py; fi - - # Perft tests - - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000; fi - - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 examples/perft/tricky.perft; fi - - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant giveaway examples/perft/giveaway.perft; fi - - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant atomic examples/perft/atomic.perft; fi - - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant racingkings examples/perft/racingkings.perft; fi - - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant horde examples/perft/horde.perft; fi - - if [[ $RUN_PERFT -eq 1 ]]; then python examples/perft/perft.py -t 1 --variant crazyhouse examples/perft/crazyhouse.perft; fi diff --git a/appveyor.yml b/appveyor.yml deleted file mode 100644 index 02400dc17..000000000 --- a/appveyor.yml +++ /dev/null @@ -1,16 +0,0 @@ -environment: - matrix: - - PYTHON: "C:\\Python37" - - PYTHON: "C:\\Python38" - -build: off - -install: - # Stockfish - - ps: Start-FileDownload "https://stockfishchess.org/files/stockfish-11-win.zip" - - 7z e stockfish-11-win.zip stockfish-11-win/Windows/*.exe - - ren stockfish_20011801_x64_bmi2.exe stockfish.exe - - set PATH=%cd%;%PATH% - -test_script: - - "%PYTHON%\\python.exe test.py -vv" From c8914c2200fe9a6a886b51fc07cf5607eccad9ee Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 7 Nov 2020 01:03:53 +0100 Subject: [PATCH 105/613] Try testing with Python 3.10 alpha --- .github/workflows/test.yml | 8 ++++---- setup.py | 1 + tox.ini | 2 +- 3 files changed, 6 insertions(+), 5 deletions(-) diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index ad8e518b0..f50b4eb2c 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -7,7 +7,7 @@ jobs: strategy: matrix: os: [ubuntu-latest, windows-latest] - python-version: [3.7, 3.8, 3.9] + python-version: [3.7, 3.8, 3.9, 3.10] runs-on: ${{ matrix.os }} steps: - uses: actions/checkout@v2 @@ -24,7 +24,7 @@ jobs: - uses: actions/checkout@v2 - uses: actions/setup-python@v2 with: - python-version: 3.9 + python-version: 3.10 - run: pip install -e . - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000 - run: python examples/perft/perft.py -t 1 examples/perft/tricky.perft @@ -36,7 +36,7 @@ jobs: mypy: strategy: matrix: - python-version: [3.8, 3.9] + python-version: [3.8, 3.9, 3.10] runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 @@ -50,7 +50,7 @@ jobs: readme: strategy: matrix: - python-version: [3.7, 3.8, 3.9] + python-version: [3.7, 3.8, 3.9, 3.10] runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 diff --git a/setup.py b/setup.py index 5ce4d2a4b..8d065f59b 100755 --- a/setup.py +++ b/setup.py @@ -103,6 +103,7 @@ def read_description(): "Programming Language :: Python :: 3.7", "Programming Language :: Python :: 3.8", "Programming Language :: Python :: 3.9", + "Programming Language :: Python :: 3.10", "Topic :: Games/Entertainment :: Board Games", "Topic :: Games/Entertainment :: Turn Based Strategy", "Topic :: Software Development :: Libraries :: Python Modules", diff --git a/tox.ini b/tox.ini index 559f81ecc..8bfa0772e 100644 --- a/tox.ini +++ b/tox.ini @@ -1,5 +1,5 @@ [tox] -envlist = py37,py38,py39 +envlist = py37,py38,py39,py310 [testenv] passenv = LD_LIBRARY_PATH From 973e9f60557dd8c67ca561c94659535e5e926d22 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 7 Nov 2020 01:06:55 +0100 Subject: [PATCH 106/613] Fix 3.10 interpreted as 3.1 --- .github/workflows/test.yml | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index f50b4eb2c..74f05b751 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -7,7 +7,7 @@ jobs: strategy: matrix: os: [ubuntu-latest, windows-latest] - python-version: [3.7, 3.8, 3.9, 3.10] + python-version: ["3.7", "3.8", "3.9", "3.10"] runs-on: ${{ matrix.os }} steps: - uses: actions/checkout@v2 @@ -24,7 +24,7 @@ jobs: - uses: actions/checkout@v2 - uses: actions/setup-python@v2 with: - python-version: 3.10 + python-version: "3.10" - run: pip install -e . - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000 - run: python examples/perft/perft.py -t 1 examples/perft/tricky.perft @@ -36,7 +36,7 @@ jobs: mypy: strategy: matrix: - python-version: [3.8, 3.9, 3.10] + python-version: ["3.8", "3.9", "3.10"] runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 @@ -50,7 +50,7 @@ jobs: readme: strategy: matrix: - python-version: [3.7, 3.8, 3.9, 3.10] + python-version: ["3.7", "3.8", "3.9", "3.10"] runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 From 20721771f8d202fb08ca45859ab8bdb52d65a86d Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 7 Nov 2020 01:09:26 +0100 Subject: [PATCH 107/613] Fully specify pre-release Python --- .github/workflows/test.yml | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index 74f05b751..64c82e11e 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -7,7 +7,7 @@ jobs: strategy: matrix: os: [ubuntu-latest, windows-latest] - python-version: ["3.7", "3.8", "3.9", "3.10"] + python-version: ["3.7", "3.8", "3.9", "3.10.0-alpha.2"] runs-on: ${{ matrix.os }} steps: - uses: actions/checkout@v2 @@ -24,7 +24,7 @@ jobs: - uses: actions/checkout@v2 - uses: actions/setup-python@v2 with: - python-version: "3.10" + python-version: "3.10.0-alpha.2" - run: pip install -e . - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000 - run: python examples/perft/perft.py -t 1 examples/perft/tricky.perft @@ -36,7 +36,7 @@ jobs: mypy: strategy: matrix: - python-version: ["3.8", "3.9", "3.10"] + python-version: ["3.8", "3.9", "3.10.0-alpha.2"] runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 @@ -50,7 +50,7 @@ jobs: readme: strategy: matrix: - python-version: ["3.7", "3.8", "3.9", "3.10"] + python-version: ["3.7", "3.8", "3.9", "3.10.0-alpha.2"] runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 From 6d262473b774158660bd8836efbc6231c1a484cd Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bo=C5=A1tjan=20Mejak?= Date: Fri, 13 Nov 2020 08:23:00 +0100 Subject: [PATCH 108/613] Add a hyphen Added a hyphen to the word "weakref-based". --- CHANGELOG.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 24070369d..ef76ae3a0 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -19,7 +19,7 @@ Changes: Bugfixes: -* Removed broken ``weakref`` based caching in ``chess.pgn.GameNode.board()``. +* Removed broken ``weakref``-based caching in ``chess.pgn.GameNode.board()``. New features: From 76aea7385291081c32bfd161ccf8325853bfd1a6 Mon Sep 17 00:00:00 2001 From: kraktus <56031107+kraktus@users.noreply.github.com> Date: Fri, 13 Nov 2020 17:27:15 +0000 Subject: [PATCH 109/613] document `legal_drop_squares` and remove unnecessary copies in `_CrazyhouseBoardState` `legal_drop_squares` was not documented yet not used in the code source and considering it returns a `chess.SquareSet` I think it was intented to be exposed to the users. when restoring a previous position form a `_CrazyhouseBoardState` it's not necessary to make a copy of the pocket since the instance is discarded. Also it's not intented to be publicly used. All test passed. --- chess/variant.py | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/chess/variant.py b/chess/variant.py index a801ed5ad..e93d992e3 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -616,8 +616,8 @@ def __init__(self, board: CrazyhouseBoardT) -> None: def restore(self, board: CrazyhouseBoardT) -> None: super().restore(board) - board.pockets[chess.WHITE] = self.pockets_w.copy() - board.pockets[chess.BLACK] = self.pockets_b.copy() + board.pockets[chess.WHITE] = self.pockets_w + board.pockets[chess.BLACK] = self.pockets_b CrazyhousePocketT = TypeVar("CrazyhousePocketT", bound="CrazyhousePocket") @@ -727,6 +727,13 @@ def legal_drop_squares_mask(self) -> chess.Bitboard: return chess.BB_EMPTY def legal_drop_squares(self) -> chess.SquareSet: + """ + Get the squares where a legal drop is possible for the side to move. + + It is legal to drop a checkmate. + + Returns a :class:`set of squares `. + """ return chess.SquareSet(self.legal_drop_squares_mask()) def is_pseudo_legal(self, move: chess.Move) -> bool: From f22baecb334987eeb74aff2e55c096e4449a6856 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 14 Nov 2020 11:19:51 +0100 Subject: [PATCH 110/613] Improve variant docs (after #694) --- chess/variant.py | 6 ++++-- docs/variant.rst | 7 +++++++ 2 files changed, 11 insertions(+), 2 deletions(-) diff --git a/chess/variant.py b/chess/variant.py index e93d992e3..346c4d139 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -728,10 +728,12 @@ def legal_drop_squares_mask(self) -> chess.Bitboard: def legal_drop_squares(self) -> chess.SquareSet: """ - Get the squares where a legal drop is possible for the side to move. + Gets the squares where the side to move could legally drop a piece. + Does *not* check, if they actually have a suitable piece in their + pocket. It is legal to drop a checkmate. - + Returns a :class:`set of squares `. """ return chess.SquareSet(self.legal_drop_squares_mask()) diff --git a/docs/variant.rst b/docs/variant.rst index d98405341..14421fb56 100644 --- a/docs/variant.rst +++ b/docs/variant.rst @@ -56,10 +56,14 @@ Crazyhouse :members: .. autoclass:: chess.variant.CrazyhouseBoard + :members: legal_drop_squares .. py:attribute:: pockets :value: [chess.variant.CrazyhousePocket(), chess.variant.CrazyhousePocket()] + Pockets for each color. For example, ``board.pockets[chess.WHITE]`` + are the pocket pieces available to White. + Three-check ----------- @@ -68,6 +72,9 @@ Three-check .. py:attribute:: remaining_checks :value: [3, 3] + Remaining checks until victory for each color. For example, + ``board.remaining_checks[chess.WHITE] == 0`` implies that White has won. + UCI/XBoard ---------- From 49d8c6dfcc55a9cd62bcf3d2163261edda2e125e Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 14 Nov 2020 13:46:54 +0100 Subject: [PATCH 111/613] Experiment with images --- README.rst | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/README.rst b/README.rst index 62720b727..f1f524d7b 100644 --- a/README.rst +++ b/README.rst @@ -299,15 +299,21 @@ Features >>> engine.quit() -Selected use cases ------------------- +Selected projects +----------------- + ++-------------------------------------------------------------+--------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------+ +| .. image:: https://syzygy-tables.info/static/favicon.96.png | .. image:: https://github.com/clente/chess/blob/master/man/figures/logo.png?raw=true | .. image:: https://github.com/QueensGambit/CrazyAra/blob/master/etc/media/crazyara_logo_medium.png?raw=true | ++-------------------------------------------------------------+--------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------+ +| https://syzygy-tables.info | https://github.com/clente/chess | https://github.com/QueensGambit/CrazyAra | ++-------------------------------------------------------------+--------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------+ +| A website to probe Syzygy endgame tablebases | Use python-chess from the R programming language (oppinionated wrapper) | Deep learning for Crazyhouse | ++-------------------------------------------------------------+--------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------+ If you like, let me know if you are creating something interesting with python-chess, for example: * a stand-alone chess computer based on DGT board – http://www.picochess.org/ -* a website to probe Syzygy endgame tablebases – https://syzygy-tables.info/ -* deep learning for Crazyhouse – https://github.com/QueensGambit/CrazyAra * a bridge between Lichess API and chess engines – https://github.com/careless25/lichess-bot * a command-line PGN annotator – https://github.com/rpdelaney/python-chess-annotator * an HTTP microservice to render board images – https://github.com/niklasf/web-boardimage From 46252e5347506eb6ff2dd21ac845922f7f58e0a6 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 14 Nov 2020 16:24:17 +0100 Subject: [PATCH 112/613] Experiment with table layouts --- README.rst | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/README.rst b/README.rst index f1f524d7b..6abc0dfd0 100644 --- a/README.rst +++ b/README.rst @@ -302,13 +302,14 @@ Features Selected projects ----------------- -+-------------------------------------------------------------+--------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------+ -| .. image:: https://syzygy-tables.info/static/favicon.96.png | .. image:: https://github.com/clente/chess/blob/master/man/figures/logo.png?raw=true | .. image:: https://github.com/QueensGambit/CrazyAra/blob/master/etc/media/crazyara_logo_medium.png?raw=true | -+-------------------------------------------------------------+--------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------+ -| https://syzygy-tables.info | https://github.com/clente/chess | https://github.com/QueensGambit/CrazyAra | -+-------------------------------------------------------------+--------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------+ -| A website to probe Syzygy endgame tablebases | Use python-chess from the R programming language (oppinionated wrapper) | Deep learning for Crazyhouse | -+-------------------------------------------------------------+--------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------+ ++-------------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ +| .. image:: https://syzygy-tables.info/static/favicon.96.png | https://syzygy-tables.info – A website to probe Syzygy endgame tablebases | ++-------------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ +| .. image:: https://github.com/clente/chess/blob/master/man/figures/logo.png?raw=true | https://github.com/clente/chess – Use python-chess from the R programming language (oppinionated wrapper) | ++-------------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ +| .. image:: https://github.com/QueensGambit/CrazyAra/blob/master/etc/media/crazyara_logo_medium.png?raw=true | https://github.com/QueensGambit/CrazyAra – Deep learning for Crazyhouse | ++-------------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ + If you like, let me know if you are creating something interesting with python-chess, for example: From 0e6866a04a70a4b3db9f03a68679025b64a38f76 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 14 Nov 2020 16:42:42 +0100 Subject: [PATCH 113/613] Finalize table with up to date projects --- README.rst | 23 ++++++++++++----------- docs/images/clente-chess.png | Bin 0 -> 24725 bytes docs/images/crazyara.png | Bin 0 -> 20531 bytes docs/images/syzygy.png | Bin 0 -> 1364 bytes 4 files changed, 12 insertions(+), 11 deletions(-) create mode 100644 docs/images/clente-chess.png create mode 100644 docs/images/crazyara.png create mode 100644 docs/images/syzygy.png diff --git a/README.rst b/README.rst index 6abc0dfd0..c22ada69a 100644 --- a/README.rst +++ b/README.rst @@ -302,17 +302,18 @@ Features Selected projects ----------------- -+-------------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ -| .. image:: https://syzygy-tables.info/static/favicon.96.png | https://syzygy-tables.info – A website to probe Syzygy endgame tablebases | -+-------------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/clente/chess/blob/master/man/figures/logo.png?raw=true | https://github.com/clente/chess – Use python-chess from the R programming language (oppinionated wrapper) | -+-------------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/QueensGambit/CrazyAra/blob/master/etc/media/crazyara_logo_medium.png?raw=true | https://github.com/QueensGambit/CrazyAra – Deep learning for Crazyhouse | -+-------------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ - - -If you like, let me know if you are creating something interesting with -python-chess, for example: +If you like, share interesting things you are doing with python-chess, for example: + ++------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/syzygy.png?raw=true | https://syzygy-tables.info – A website to probe Syzygy endgame tablebases | +| :target: https://syzygy-tables.info | | ++------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | https://github.com/clente/chess – Oppinionated wrapper to use python-chess from R | +| :target: https://github.com/clente/chess | | ++------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/crazyara.png?raw=true | https://github.com/QueensGambit/CrazyAra – Deep learning for Crazyhouse | +| :target: https://github.com/QueensGambit/CrazyAra | | ++------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ * a stand-alone chess computer based on DGT board – http://www.picochess.org/ * a bridge between Lichess API and chess engines – https://github.com/careless25/lichess-bot diff --git a/docs/images/clente-chess.png b/docs/images/clente-chess.png new file mode 100644 index 0000000000000000000000000000000000000000..1efdd5937a426f644b26069693a451547735f659 GIT binary patch literal 24725 zcmeFYWmH|wwk?XgTX1)GcXxNUg}b}EyA#}<;4VQza1FuT-66mw`S#iS+wY!t?mMl$ z`|m(oux3>seT?cgM%66VBvMgc0v-k%1_%fUUP@9_`Qx|Y$IBiH;^Qak+a(*ZyT@US!k0`mB|mZOt|%asIpZ-~+cS&!cXQWPw9XZ)V$ zyd`f&o~*SnJ7=I$Z3@Q6J8r1B@B)N(KKcGsck*^u=MPR0?B3p_FH!UPeJ@cW$7k;K z!2jkI&&SWd_kH0a{_(*;-~GldL91LMJilDNIUUx+Ke!PyAO{gl7F|HSM1@yWwP z?;8(?*%Zu!6w_z4q=So$ZF8Wb*Mr$z$gS60PZP=13l-{LXB#?$=E8m)3U3NUPQBto 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49ea0d494f4ccd38902911b63a35492dae97d747 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 14 Nov 2020 20:01:07 +0100 Subject: [PATCH 115/613] Tweak legal_drop_squares docs (closes #696) --- chess/variant.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/variant.py b/chess/variant.py index 346c4d139..73e33362c 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -729,7 +729,7 @@ def legal_drop_squares_mask(self) -> chess.Bitboard: def legal_drop_squares(self) -> chess.SquareSet: """ Gets the squares where the side to move could legally drop a piece. - Does *not* check, if they actually have a suitable piece in their + Does *not* check whether they actually have a suitable piece in their pocket. It is legal to drop a checkmate. From 6abc53bf70ebb3c6b36c27c015f001a1a3191dfc Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 14 Nov 2020 20:24:44 +0100 Subject: [PATCH 116/613] Add icons for jcchess and PettingZoo --- README.rst | 20 ++++++++++++-------- docs/images/jcchess.png | Bin 0 -> 20967 bytes docs/images/pettingzoo.png | Bin 0 -> 3741 bytes 3 files changed, 12 insertions(+), 8 deletions(-) create mode 100644 docs/images/jcchess.png create mode 100644 docs/images/pettingzoo.png diff --git a/README.rst b/README.rst index c22ada69a..9bde69c07 100644 --- a/README.rst +++ b/README.rst @@ -305,14 +305,20 @@ Selected projects If you like, share interesting things you are doing with python-chess, for example: +------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/syzygy.png?raw=true | https://syzygy-tables.info – A website to probe Syzygy endgame tablebases | -| :target: https://syzygy-tables.info | | +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/syzygy.png?raw=true | https://syzygy-tables.info – | +| :target: https://syzygy-tables.info/ | A website to probe Syzygy endgame tablebases | +------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | https://github.com/clente/chess – Oppinionated wrapper to use python-chess from R | -| :target: https://github.com/clente/chess | | +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | https://github.com/clente/chess – | +| :target: https://github.com/clente/chess | Oppinionated wrapper to use python-chess from the R programming language | +------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/crazyara.png?raw=true | https://github.com/QueensGambit/CrazyAra – Deep learning for Crazyhouse | -| :target: https://github.com/QueensGambit/CrazyAra | | +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/crazyara.png?raw=true | https://crazyara.org/ – | +| :target: https://crazyara.org/ | Deep learning for Crazyhouse | ++------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/jcchess.png?raw=true | http://johncheetham.com/projects/jcchess/ – | +| :target: http://johncheetham.com/projects/jcchess/ | A GUI to play against UCI chess engines | ++------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/pettingzoo.png?raw=true | https://github.com/PettingZoo-Team/PettingZoo / https://www.pettingzoo.ml/classic/chess – | +| :target: https://github.com/PettingZoo-Team/PettingZoo | A multi-agent reinforcement learning environment | +------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ * a stand-alone chess computer based on DGT board – http://www.picochess.org/ @@ -320,12 +326,10 @@ If you like, share interesting things you are doing with python-chess, for examp * a command-line PGN annotator – https://github.com/rpdelaney/python-chess-annotator * an HTTP microservice to render board images – https://github.com/niklasf/web-boardimage * a JIT compiled chess engine – https://github.com/SamRagusa/Batch-First -* a GUI to play against UCI chess engines – http://johncheetham.com/projects/jcchess/ * teaching Cognitive Science – `https://jupyter.brynmawr.edu `_ * an `Alexa skill to play blindfold chess `_ – https://github.com/laynr/blindfold-chess * a chessboard widget for PySide2 – https://github.com/H-a-y-k/hichesslib * Django Rest Framework API for multiplayer chess – https://github.com/WorkShoft/capablanca-api -* a multi-agent reinforcement learning environment – https://github.com/PettingZoo-Team/PettingZoo / https://www.pettingzoo.ml/classic/chess Acknowledgements ---------------- diff --git a/docs/images/jcchess.png b/docs/images/jcchess.png new file mode 100644 index 0000000000000000000000000000000000000000..4e3a0b529a0af8dd6ee8c1fbbca7afdea51cf121 GIT binary patch literal 20967 zcmeFYWmKHawl3PZdvJGmhsNEV-~?&hU4lb!3mPnFa1ZY85Zoa+!QJJMd~2`u?R)m! z=k77?`M0`9OI1DdnN?5CS@pg>s>78PrI6t9-~j*tl8m&t>f5LA?-wle+k1(n;~D@! zedVRD<)UijPU7HXZ)Rx&B60C_0Fi(^EX@D_kEQYqYq#x2r{Gs-On10md@W=H-~j*G z#j`|UL9$nKtdFhxL{R~HWG^{88yUOG{L93vM}^<>q2UQ~wE=5Vn(jEapK;`vdwcQi z{q%8ZOP)`i(D^f_(5uJu!$ZhkL1)Ltlh&p8^PcOiYtW_AUdz?7q-%Qzj*#Ev8ui`7 za`YMuRP^BGn3w&`8a|Yt@5UPb6?-{Gaj2|@W(JQ@+@5Yh!)!xp_^))*s*0$22iy!{%^<%|HpS_oh2m5sN3(x1x zkgt(nI$oZ)4w;@k&zW^M?Uj%(4~K*dZdX&*3oq|qJvH01%)c&Pr)p0wGTcM@-PGlX zpWVG31B`mwr$}04S(!M9M5wEo`qE4-Egps$CWQ2l(@iSZcl{p_^kjWmWr@WGZ4|G) 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zfXgkjSS7VuOaWmIZF_rru)ba)3+Qevif`bn@B#8guNj<$aXK}e3=>SZL5mk5A+_TV zb&}o$sJfjnS>v|0wvO}4$`u|i4?wMbwS%)6p&t_f*REnj z7jxo#&Ts-i+IKOfW|IKG5rXM|pE(Z~<-EF>vwMB9R?VE*T%u{2XZ+O?IK!q1zp4Np z+y%%*BIyDIBUEQ@Z2zSLSaUL^*v<NUqQY*yF6|tq1kAs=|9pNJ!8a z48{VTPTvjYI>D%Ezp1EiL^%Iy!0;)>ZDMY(Tl=mCu8s$ o)$$twn{IEVKMqQNJp4!JN{UKPTKfkNpt3+FxGM(aOV?8W53zP0H2?qr literal 0 HcmV?d00001 From 41a605ce7d6d8c374771b13c3cb097074f6a9771 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 14 Nov 2020 20:27:35 +0100 Subject: [PATCH 117/613] Explicitly specify icon sizes --- README.rst | 42 ++++++++++++++++++++++++++---------------- 1 file changed, 26 insertions(+), 16 deletions(-) diff --git a/README.rst b/README.rst index 9bde69c07..b86c3a25a 100644 --- a/README.rst +++ b/README.rst @@ -304,22 +304,32 @@ Selected projects If you like, share interesting things you are doing with python-chess, for example: -+------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/syzygy.png?raw=true | https://syzygy-tables.info – | -| :target: https://syzygy-tables.info/ | A website to probe Syzygy endgame tablebases | -+------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | https://github.com/clente/chess – | -| :target: https://github.com/clente/chess | Oppinionated wrapper to use python-chess from the R programming language | -+------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/crazyara.png?raw=true | https://crazyara.org/ – | -| :target: https://crazyara.org/ | Deep learning for Crazyhouse | -+------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/jcchess.png?raw=true | http://johncheetham.com/projects/jcchess/ – | -| :target: http://johncheetham.com/projects/jcchess/ | A GUI to play against UCI chess engines | -+------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/pettingzoo.png?raw=true | https://github.com/PettingZoo-Team/PettingZoo / https://www.pettingzoo.ml/classic/chess – | -| :target: https://github.com/PettingZoo-Team/PettingZoo | A multi-agent reinforcement learning environment | -+------------------------------------------------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------+ ++------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/syzygy.png?raw=true | https://syzygy-tables.info – | +| :target: https://syzygy-tables.info/ | A website to probe Syzygy endgame tablebases | +| :height: 64 | | +| :width: 64 | | ++------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | https://github.com/clente/chess – | +| :target: https://github.com/clente/chess | Oppinionated wrapper to use python-chess from the R programming language | +| :height: 64 | | +| :width: 64 | | ++------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/crazyara.png?raw=true | https://crazyara.org/ – | +| :target: https://crazyara.org/ | Deep learning for Crazyhouse | +| :height: 64 | | +| :width: 64 | | ++------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/jcchess.png?raw=true | http://johncheetham.com/projects/jcchess/ – | +| :target: http://johncheetham.com/projects/jcchess/ | A GUI to play against UCI chess engines | +| :height: 64 | | +| :width: 64 | | ++------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/pettingzoo.png?raw=true | https://github.com/PettingZoo-Team/PettingZoo / https://www.pettingzoo.ml/classic/chess – | +| :target: https://github.com/PettingZoo-Team/PettingZoo | A multi-agent reinforcement learning environment | +| :height: 64 | | +| :width: 64 | | ++------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------+ * a stand-alone chess computer based on DGT board – http://www.picochess.org/ * a bridge between Lichess API and chess engines – https://github.com/careless25/lichess-bot From 2def3b582e806c2591f12cf300c32437153d0a53 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 14 Nov 2020 20:35:21 +0100 Subject: [PATCH 118/613] More tweaks to featured projects --- README.rst | 52 ++++++++++++++++++++++++++-------------------------- 1 file changed, 26 insertions(+), 26 deletions(-) diff --git a/README.rst b/README.rst index b86c3a25a..42309520d 100644 --- a/README.rst +++ b/README.rst @@ -304,32 +304,32 @@ Selected projects If you like, share interesting things you are doing with python-chess, for example: -+------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/syzygy.png?raw=true | https://syzygy-tables.info – | -| :target: https://syzygy-tables.info/ | A website to probe Syzygy endgame tablebases | -| :height: 64 | | -| :width: 64 | | -+------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | https://github.com/clente/chess – | -| :target: https://github.com/clente/chess | Oppinionated wrapper to use python-chess from the R programming language | -| :height: 64 | | -| :width: 64 | | -+------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/crazyara.png?raw=true | https://crazyara.org/ – | -| :target: https://crazyara.org/ | Deep learning for Crazyhouse | -| :height: 64 | | -| :width: 64 | | -+------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/jcchess.png?raw=true | http://johncheetham.com/projects/jcchess/ – | -| :target: http://johncheetham.com/projects/jcchess/ | A GUI to play against UCI chess engines | -| :height: 64 | | -| :width: 64 | | -+------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/pettingzoo.png?raw=true | https://github.com/PettingZoo-Team/PettingZoo / https://www.pettingzoo.ml/classic/chess – | -| :target: https://github.com/PettingZoo-Team/PettingZoo | A multi-agent reinforcement learning environment | -| :height: 64 | | -| :width: 64 | | -+------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------+ ++------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/syzygy.png?raw=true | https://syzygy-tables.info | +| :height: 64 | | +| :width: 64 | | +| :target: https://syzygy-tables.info/ | A website to probe Syzygy endgame tablebases | ++------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | https://github.com/clente/chess | +| :height: 64 | | +| :width: 64 | | +| :target: https://github.com/clente/chess | Oppinionated wrapper to use python-chess from the R programming language | ++------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/crazyara.png?raw=true | https://crazyara.org/ | +| :height: 64 | | +| :width: 64 | | +| :target: https://crazyara.org/ | Deep learning for Crazyhouse | ++------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/jcchess.png?raw=true | http://johncheetham.com/projects/jcchess/ | +| :height: 64 | | +| :width: 64 | | +| :target: http://johncheetham.com/projects/jcchess/ | A GUI to play against UCI chess engines | ++------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/pettingzoo.png?raw=true | https://github.com/PettingZoo-Team/PettingZoo / https://www.pettingzoo.ml/classic/chess | +| :width: 64 | | +| :height: 64 | | +| :target: https://github.com/PettingZoo-Team/PettingZoo | A multi-agent reinforcement learning environment | ++------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ * a stand-alone chess computer based on DGT board – http://www.picochess.org/ * a bridge between Lichess API and chess engines – https://github.com/careless25/lichess-bot From eb34856612fc887175017f136b2665b9bd86b850 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 14 Nov 2020 20:46:20 +0100 Subject: [PATCH 119/613] Tweak PettingZoo entry --- README.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/README.rst b/README.rst index 42309520d..99e142aa9 100644 --- a/README.rst +++ b/README.rst @@ -325,10 +325,10 @@ If you like, share interesting things you are doing with python-chess, for examp | :width: 64 | | | :target: http://johncheetham.com/projects/jcchess/ | A GUI to play against UCI chess engines | +------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/pettingzoo.png?raw=true | https://github.com/PettingZoo-Team/PettingZoo / https://www.pettingzoo.ml/classic/chess | +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/pettingzoo.png?raw=true | https://www.pettingzoo.ml/classic/chess | | :width: 64 | | | :height: 64 | | -| :target: https://github.com/PettingZoo-Team/PettingZoo | A multi-agent reinforcement learning environment | +| :target: https://www.pettingzoo.ml/classic/chess | A multi-agent reinforcement learning environment | +------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ * a stand-alone chess computer based on DGT board – http://www.picochess.org/ From bb6b35f37cdebc320ca1a3f2c335aa67a038720b Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 14 Nov 2020 20:51:57 +0100 Subject: [PATCH 120/613] Tweak featured project view for mobile --- README.rst | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/README.rst b/README.rst index 99e142aa9..d1ee38aa0 100644 --- a/README.rst +++ b/README.rst @@ -305,12 +305,12 @@ Selected projects If you like, share interesting things you are doing with python-chess, for example: +------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/syzygy.png?raw=true | https://syzygy-tables.info | +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/syzygy.png?raw=true | https://syzygy-tables.info/ | | :height: 64 | | | :width: 64 | | | :target: https://syzygy-tables.info/ | A website to probe Syzygy endgame tablebases | +------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | https://github.com/clente/chess | +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | `clente/chess `_ | | :height: 64 | | | :width: 64 | | | :target: https://github.com/clente/chess | Oppinionated wrapper to use python-chess from the R programming language | @@ -320,12 +320,12 @@ If you like, share interesting things you are doing with python-chess, for examp | :width: 64 | | | :target: https://crazyara.org/ | Deep learning for Crazyhouse | +------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/jcchess.png?raw=true | http://johncheetham.com/projects/jcchess/ | +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/jcchess.png?raw=true | `http://johncheetham.com `_ | | :height: 64 | | | :width: 64 | | | :target: http://johncheetham.com/projects/jcchess/ | A GUI to play against UCI chess engines | +------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ -| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/pettingzoo.png?raw=true | https://www.pettingzoo.ml/classic/chess | +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/pettingzoo.png?raw=true | `https://www.pettingzoo.ml `_ | | :width: 64 | | | :height: 64 | | | :target: https://www.pettingzoo.ml/classic/chess | A multi-agent reinforcement learning environment | From cde221f45368c21aaffac58ecf17ccb4587ac50b Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sun, 22 Nov 2020 21:54:33 +0100 Subject: [PATCH 121/613] Add kingOfTheHill and 3check aliases --- chess/variant.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/chess/variant.py b/chess/variant.py index 73e33362c..8376b89c0 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -325,7 +325,7 @@ def status(self) -> chess.Status: class KingOfTheHillBoard(chess.Board): - aliases = ["King of the Hill", "KOTH"] + aliases = ["King of the Hill", "KOTH", "kingOfTheHill"] uci_variant = "kingofthehill" xboard_variant = "kingofthehill" # Unofficial @@ -491,7 +491,7 @@ def restore(self, board: ThreeCheckBoardT) -> None: class ThreeCheckBoard(chess.Board): - aliases = ["Three-check", "Three check", "Threecheck", "Three check chess", "3-check"] + aliases = ["Three-check", "Three check", "Threecheck", "Three check chess", "3-check", "3check"] uci_variant = "3check" xboard_variant = "3check" starting_fen = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 3+3 0 1" From 6322f0e27d1af53fe686fd321c11e1506d402123 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 28 Nov 2020 13:11:13 +0100 Subject: [PATCH 122/613] Clarify chess.engine.PlayResult.info (fixes #700) --- chess/engine.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index 182a12466..2a0bff256 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -385,7 +385,8 @@ class PlayResult: info: InfoDict """ A dictionary of extra :class:`information ` - sent by the engine. + sent by the engine, if selected with the *info* argument of + :func:`~chess.engine.Protocol.play()`. """ draw_offered: bool From 140215f51e00d9773e14a8fa33ca1d8f37058e4e Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sun, 29 Nov 2020 23:03:47 +0100 Subject: [PATCH 123/613] Retroactively mention #680 in changelog --- CHANGELOG.rst | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index ef76ae3a0..7a2a8c374 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -47,6 +47,10 @@ Changes: installs the package from the new location as a dependency (as recommended by `PEP423 `_). + ``ModuleNotFoundError: No module named 'chess'`` after upgrading from + previous versions? Run ``pip install --force-reinstall chess`` + (due to https://github.com/niklasf/python-chess/issues/680). + New in v1.2.0 ------------- From 2dbb07b351193a3258ae46e1f523d19e8c673280 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bo=C5=A1tjan=20Mejak?= Date: Mon, 30 Nov 2020 10:52:55 +0100 Subject: [PATCH 124/613] Clarify that ebf is effective branching factor Clarified that the ebf attribute of InfoDict() is effective branching factor. Explained here: https://www.chessprogramming.org/Branching_Factor#Effective_Branching_Factor --- chess/engine.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index 2a0bff256..de5ccd6ed 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -347,7 +347,7 @@ class InfoDict(typing.TypedDict, total=False): (``1`` for the mainline). Others: ``tbhits``, ``currmove``, ``currmovenumber``, ``hashfull``, - ``cpuload``, ``refutation``, ``currline``, ``ebf``, + ``cpuload``, ``refutation``, ``currline``, ``ebf`` (effective branching factor), ``wdl`` (a :class:`~chess.engine.PovWdl`), and ``string``. """ score: PovScore From 4f1e5da29e7a54bced33db6affaacf4524771ebc Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sun, 6 Dec 2020 12:47:12 +0100 Subject: [PATCH 125/613] Fix parsing of castling moves in variant 960 PGNs (fixes #705) --- chess/pgn.py | 6 ++++-- test.py | 12 ++++++++++++ 2 files changed, 16 insertions(+), 2 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index 01b63eb9b..83a24194f 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -1523,12 +1523,14 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any: # Initial position. fen = headers.get("FEN", VariantBoard.starting_fen) try: - board_stack = [VariantBoard(fen, chess960=headers.is_chess960())] + board = VariantBoard(fen, chess960=headers.is_chess960()) except ValueError as error: visitor.handle_error(error) skipping_game = True else: - visitor.visit_board(board_stack[0]) + board.chess960 = board.chess960 or board.has_chess960_castling_rights() + board_stack = [board] + visitor.visit_board(board) # Fast path: Skip entire game. if skipping_game: diff --git a/test.py b/test.py index fc22dfab8..7363178c5 100755 --- a/test.py +++ b/test.py @@ -3915,6 +3915,18 @@ def test_atomic_validity(self): board = chess.variant.AtomicBoard("3N1NB1/2N1Q1N1/3RkR2/2NP1PN1/3NKN2/8/8/n7 w - - 0 1") self.assertEqual(board.status(), chess.STATUS_VALID) + def test_atomic960(self): + pgn = io.StringIO(textwrap.dedent("""\ + [Variant "Atomic"] + [FEN "rkrbbnnq/pppppppp/8/8/8/8/PPPPPPPP/RKRBBNNQ w KQkq - 0 1"] + + 1. g3 d5 2. Nf3 e5 3. Ng5 Bxg5 4. Qf3 Ne6 5. Qa3 a5 6. d4 g6 7. c3 h5 8. h4 Qh6 9. Bd2 Qxd2 10. O-O-O * + """)) + game = chess.pgn.read_game(pgn) + self.assertTrue(game.board().chess960) + self.assertEqual(game.end().parent.board().fen(), "rkr1b1n1/1pp2p2/4n1p1/p2pp2p/3P3P/Q1P3P1/PP2PP2/RK3N2 w Qkq - 0 10") + self.assertEqual(game.end().board().fen(), "rkr1b1n1/1pp2p2/4n1p1/p2pp2p/3P3P/Q1P3P1/PP2PP2/2KR1N2 b kq - 1 10") + class RacingKingsTestCase(unittest.TestCase): From cda08f229fdb43a0435d0d96d776cb8668db0d46 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sun, 6 Dec 2020 12:59:39 +0100 Subject: [PATCH 126/613] Mention maia --- README.rst | 5 +++++ docs/images/maia.png | Bin 0 -> 3143 bytes 2 files changed, 5 insertions(+) create mode 100644 docs/images/maia.png diff --git a/README.rst b/README.rst index d1ee38aa0..3c70b3c54 100644 --- a/README.rst +++ b/README.rst @@ -310,6 +310,11 @@ If you like, share interesting things you are doing with python-chess, for examp | :width: 64 | | | :target: https://syzygy-tables.info/ | A website to probe Syzygy endgame tablebases | +------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ +| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/maia.png?raw=true | https://maiachess.com/ | +| :height: 64 | | +| :width: 64 | | +| :target: https://maiachess.com/ | A human-like neural network chess engine | ++------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ | .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | `clente/chess `_ | | :height: 64 | | | :width: 64 | | diff --git a/docs/images/maia.png b/docs/images/maia.png new file mode 100644 index 0000000000000000000000000000000000000000..c43c7dd31aa437aa1a941e31d058d68ce3260035 GIT binary patch literal 3143 zcmV-N47l@&P)EX>4Tx04R}tkv&MmKpe$iQ?;TM2Rn#3WT*~eK~&UHt5Adrp;l;lcSTOi_^|?PskD9R<;1h{wnPJ+*8^lwa zw!wLyIK=X@N_8P93mETO{_FA%bObUBym{PbjlY} z9;=+UIBUf+tKXBqFqqL-mbp%I5HT!b2@*soD5HQPY(!|)NwJWi{b&pSfa{mYrI4!t zMveuPph0&1;D7MDTPr&;?j;4IK>Lg1d<+4BU7%KRobO}Dsht4+XW&Y2_)Aq_=9BbF zLkk}Pz1zUWbwgA3fXf}A|H+U|*_He>g=`jhKcjC-1AVtZ*P7Q`eIKU}K$5zO-v9@P zz;KST*IT^1v$?l_&(!<-0i?rnyO9y(rvLx|24YJ`L;(K){{a7>y{D4^000SaNLh0L z04^f{04^f|c%?sf00007bV*G`2jmO}3ppj|Pxtiz000?uMObu0Z*6U5Zgc=ca%Ew3 zWn>_CX>@2HM@dakSAh-}000UeNklpp!j#TF_810upC zq$DJSB;-Oa>mU2<K)$o zPF+vxoU^5X*E9pAF}Z*PoK&C%Xatr57XZ7>eS3fptAGC-Xa$r4<9q{diSeC>SjKH)2MTMT;iWE=1U;3L2X zfG2>b1m9y(z!2b8V7|F_8dwMX%@;3%Vn|;S_WM}iKHv@J+F{@}u|UnhMwRSKft#hQ z*>cI6xD-$VECAl-yZ($6&?bc>b$&`NQWsJ@oscEf>b_cKiCP1Ful9klnZSA}phEBY z9`G(RhGBx)vAIA!u)+kNga-VS@ylhpUMbBlRscIK)+R`PDm?I44g5~vhrplo`+ne~ ziWQ!l90Ohzuv)Crd3*psnkJj$l?8H@zOq0rz-o))f!EgtS%YJ&szPZtGF%-D zG6{GH_@w;33wT~J;5EY{jh0(%2&f_ltpdg?+P`1@Z50$=1U#w1z6|_Ju7_gC*A>UI zc7c@A%Nld6GNxRp8Cj}~F$%aHxJn)E%LS$YUlM8rxI)j33g}yr2H&N2PAN4P`m#!~ z5au0HkRw-FDa*)80b_uF(3^+v)=L1UDm@(mE|RiZ6wHRDQNSH)XS0CNR()R-V4W)s zh1RT;mmiY4?>F>Xy^v#8S)c*?`^h}9nr`UYAGF>>N zKnmKTiAtAZ+kkH<2wtO1v|banD^mq@0Kb!e*%urNL4t8e0{D#F1*OcjGVd^{k>Y*< zTq5h-2z<;0%t%4dqpWu*wd_zw76qU>Cj+GC_|Bbx>(hWGYO4vjH$#NCANaf~(*!UV zxW~sihAN<2FK?0NTjYmr1}NBT;wj-WQd_E7ajVMu7`O%p!REd=^%; 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Previously + all castling moves in such games were rejected. + New in v1.3.0 ------------- diff --git a/README.rst b/README.rst index 3c70b3c54..9a4838c3d 100644 --- a/README.rst +++ b/README.rst @@ -302,7 +302,7 @@ Features Selected projects ----------------- -If you like, share interesting things you are doing with python-chess, for example: +If you like, share interesting things you are using python-chess for, for example: +------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+ | .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/syzygy.png?raw=true | https://syzygy-tables.info/ | diff --git a/chess/__init__.py b/chess/__init__.py index 526494217..0cdb2a8db 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -26,7 +26,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.3.0" +__version__ = "1.3.1" import collections import copy From 14a22afdb9aa6be4588c91311011e1ae82eee1b3 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sun, 6 Dec 2020 13:17:11 +0100 Subject: [PATCH 128/613] Include license via MANIFEST instead of setup.py --- MANIFEST.in | 1 + setup.py | 1 - 2 files changed, 1 insertion(+), 1 deletion(-) diff --git a/MANIFEST.in b/MANIFEST.in index 18e068342..77ac05205 100644 --- a/MANIFEST.in +++ b/MANIFEST.in @@ -1 +1,2 @@ include CHANGELOG.rst +include LICENSE.txt diff --git a/setup.py b/setup.py index 8d065f59b..967e7d9c9 100755 --- a/setup.py +++ b/setup.py @@ -83,7 +83,6 @@ def read_description(): long_description=read_description(), long_description_content_type="text/x-rst", license="GPL-3.0+", - license_file="LICENSE.txt", keywords="chess fen epd pgn polyglot syzygy gaviota uci xboard", url="https://github.com/niklasf/python-chess", packages=["chess"], From c5f525fcef89b809b9a904f18fa3531ac89d6df1 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 7 Dec 2020 12:31:17 +0100 Subject: [PATCH 129/613] A comma --- CHANGELOG.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index fca44375d..e548e0b2e 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -7,7 +7,7 @@ New in v1.3.1 Bugfixes: * ``chess.pgn.read_game()`` now properly detects variant games with Chess960 - castling rights (as well as mislabeled Standard Chess960 games). Previously + castling rights (as well as mislabeled Standard Chess960 games). Previously, all castling moves in such games were rejected. New in v1.3.0 From 5f61e42babb273f491087f571162b5283987df98 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 7 Dec 2020 12:46:08 +0100 Subject: [PATCH 130/613] Clarify find_variant() --- chess/variant.py | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/chess/variant.py b/chess/variant.py index 8376b89c0..863e7678e 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -867,7 +867,10 @@ def status(self) -> chess.Status: def find_variant(name: str) -> Type[chess.Board]: - """Looks for a variant board class by variant name.""" + """ + Looks for a variant board class by variant name. Supports many common + aliases. + """ for variant in VARIANTS: if any(alias.lower() == name.lower() for alias in variant.aliases): return variant From bfc727a895ba79d8ef63c8e417ccafb3c8ff9c1b Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 7 Dec 2020 12:51:05 +0100 Subject: [PATCH 131/613] Clarify variant game end (fixes #706) --- docs/variant.rst | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/docs/variant.rst b/docs/variant.rst index 14421fb56..0a5515873 100644 --- a/docs/variant.rst +++ b/docs/variant.rst @@ -15,10 +15,6 @@ python-chess supports several chess variants. >>> type(board).starting_fen 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w - - 0 1' -See :func:`chess.Board.is_variant_end()`, :func:`~chess.Board.is_variant_win()`, -:func:`~chess.Board.is_variant_draw()`, or :func:`~chess.Board.is_variant_loss()` -for special variant end conditions and results. - ================ ========================================= ============= ============ Variant Board class UCI/XBoard Syzygy ================ ========================================= ============= ============ @@ -36,6 +32,20 @@ Crazyhouse :class:`chess.variant.CrazyhouseBoard` crazyhouse .. autofunction:: chess.variant.find_variant +Game end +-------- + +See :func:`chess.Board.is_variant_end()`, :func:`~chess.Board.is_variant_win()`, +:func:`~chess.Board.is_variant_draw()`, +or :func:`~chess.Board.is_variant_loss()` for special variant end conditions +and results. + +Note that if all of them return ``False``, the game may still be over and +decided by standard conditions like :func:`~chess.Board.is_checkmate()`, +:func:`~chess.Board.is_stalemate()`, +:func:`~chess.Board.is_insufficient_material()`, move counters, repetitions, +and legitimate claims. + Chess960 -------- From 590e3eaea511fa7b0e31ef2decc212887f7b9f25 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 7 Dec 2020 16:24:06 +0100 Subject: [PATCH 132/613] Clarify chess.pgn.read_headers (#701) --- chess/pgn.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/chess/pgn.py b/chess/pgn.py index 83a24194f..5b006f0e1 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -1655,7 +1655,8 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any: def read_headers(handle: TextIO) -> Optional[Headers]: """ - Reads game headers from a PGN file opened in text mode. + Reads game headers from a PGN file opened in text mode. Skips the rest of + the game. Since actually parsing many games from a big file is relatively expensive, this is a better way to look only for specific games and then seek and From dec8e6a95b1c255f170c300f00ea01f4e10ef3ea Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 7 Dec 2020 22:28:23 +0100 Subject: [PATCH 133/613] Remove unused import weakref --- chess/pgn.py | 1 - 1 file changed, 1 deletion(-) diff --git a/chess/pgn.py b/chess/pgn.py index 5b006f0e1..a5ea63549 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -21,7 +21,6 @@ import itertools import logging import re -import weakref import typing import chess From 8ca6bc38a6ec3f522284a4a80dfe17636052f603 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 8 Dec 2020 00:23:41 +0100 Subject: [PATCH 134/613] Allow bare except (with reraise, PyCQA/pycodestyle#703) --- tox.ini | 1 + 1 file changed, 1 insertion(+) diff --git a/tox.ini b/tox.ini index 8bfa0772e..13a3dc90a 100644 --- a/tox.ini +++ b/tox.ini @@ -18,4 +18,5 @@ ignore = E741 # Allow "ambiguous" variable names W504 # Allow binary operators before EOL (end of line) E704 E301 # Allow "def overloaded(): ..." + E722 # Bare except (with or without reraise) max-line-length = 160 From 31eb8a6636f1250fe76de91cf9752e4f43d1fde5 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 8 Dec 2020 12:08:51 +0100 Subject: [PATCH 135/613] Detect impossible checker alignment (fixes #707) --- chess/__init__.py | 43 +++++++++++++++++++++++++------------------ chess/variant.py | 1 + test.py | 8 ++++++++ 3 files changed, 34 insertions(+), 18 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index 0cdb2a8db..a41d6ee92 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -84,22 +84,24 @@ def piece_name(piece_type: PieceType) -> str: class Status(enum.IntFlag): VALID = 0 - NO_WHITE_KING = 1 - NO_BLACK_KING = 2 - TOO_MANY_KINGS = 4 - TOO_MANY_WHITE_PAWNS = 8 - TOO_MANY_BLACK_PAWNS = 16 - PAWNS_ON_BACKRANK = 32 - TOO_MANY_WHITE_PIECES = 64 - TOO_MANY_BLACK_PIECES = 128 - BAD_CASTLING_RIGHTS = 256 - INVALID_EP_SQUARE = 512 - OPPOSITE_CHECK = 1024 - EMPTY = 2048 - RACE_CHECK = 4096 - RACE_OVER = 8192 - RACE_MATERIAL = 16384 - TOO_MANY_CHECKERS = 32768 + NO_WHITE_KING = 1 << 0 + NO_BLACK_KING = 1 << 1 + TOO_MANY_KINGS = 1 << 2 + TOO_MANY_WHITE_PAWNS = 1 << 3 + TOO_MANY_BLACK_PAWNS = 1 << 4 + PAWNS_ON_BACKRANK = 1 << 5 + TOO_MANY_WHITE_PIECES = 1 << 6 + TOO_MANY_BLACK_PIECES = 1 << 7 + BAD_CASTLING_RIGHTS = 1 << 8 + INVALID_EP_SQUARE = 1 << 9 + OPPOSITE_CHECK = 1 << 10 + EMPTY = 1 << 11 + RACE_CHECK = 1 << 12 + RACE_OVER = 1 << 13 + RACE_MATERIAL = 1 << 14 + TOO_MANY_CHECKERS = 1 << 15 + IMPOSSIBLE_CHECK = 1 << 16 + STATUS_VALID = Status.VALID STATUS_NO_WHITE_KING = Status.NO_WHITE_KING @@ -118,6 +120,7 @@ class Status(enum.IntFlag): STATUS_RACE_OVER = Status.RACE_OVER STATUS_RACE_MATERIAL = Status.RACE_MATERIAL STATUS_TOO_MANY_CHECKERS = Status.TOO_MANY_CHECKERS +STATUS_IMPOSSIBLE_CHECK = Status.IMPOSSIBLE_CHECK Square = int @@ -3275,7 +3278,8 @@ def status(self) -> Status: :data:`~chess.STATUS_RACE_CHECK`, :data:`~chess.STATUS_RACE_OVER`, :data:`~chess.STATUS_RACE_MATERIAL`, - :data:`~chess.STATUS_TOO_MANY_CHECKERS`. + :data:`~chess.STATUS_TOO_MANY_CHECKERS`, + :data:`~chess.STATUS_IMPOSSIBLE_CHECK`. """ errors = STATUS_VALID @@ -3320,8 +3324,11 @@ def status(self) -> Status: errors |= STATUS_OPPOSITE_CHECK # More than the maximum number of possible checkers in the variant. - if popcount(self.checkers_mask()) > 2: + checkers = self.checkers_mask() + if popcount(checkers) > 2: errors |= STATUS_TOO_MANY_CHECKERS + elif popcount(checkers) == 2 and ray(lsb(checkers), msb(checkers)) & self.kings & ~self.promoted: + errors |= STATUS_IMPOSSIBLE_CHECK return errors diff --git a/chess/variant.py b/chess/variant.py index 863e7678e..88f002b9d 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -320,6 +320,7 @@ def status(self) -> chess.Status: status &= ~chess.STATUS_NO_BLACK_KING if chess.popcount(self.checkers_mask()) <= 14: status &= ~chess.STATUS_TOO_MANY_CHECKERS + status &= ~chess.STATUS_IMPOSSIBLE_CHECK return status diff --git a/test.py b/test.py index 7363178c5..433ca33f0 100755 --- a/test.py +++ b/test.py @@ -990,6 +990,14 @@ def test_status(self): board = chess.Board("4k3/5P2/3N4/8/8/8/4R3/4K3 b - - 0 1") self.assertEqual(board.status(), chess.STATUS_TOO_MANY_CHECKERS) + # Impossible checker alignment. + board = chess.Board("3R4/8/q4k2/2B5/1NK5/3b4/8/8 w - - 0 1") + self.assertEqual(board.status(), chess.STATUS_IMPOSSIBLE_CHECK) + board = chess.Board("2Nq4/2K5/1b6/8/7R/3k4/7P/8 w - - 0 1") + self.assertEqual(board.status(), chess.STATUS_IMPOSSIBLE_CHECK) + board = chess.Board("5R2/2P5/8/4k3/8/3rK2r/8/8 w - - 0 1") + self.assertEqual(board.status(), chess.STATUS_IMPOSSIBLE_CHECK) + def test_one_king_movegen(self): board = chess.Board.empty() board.set_piece_at(chess.A1, chess.Piece(chess.KING, chess.WHITE)) From 0bbb045a16126f99ec517f1e246ae8186835a6ca Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 12 Dec 2020 14:36:40 +0100 Subject: [PATCH 136/613] Prepare 1.3.2 --- CHANGELOG.rst | 11 +++++++++++ chess/__init__.py | 2 +- 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index e548e0b2e..158e290ff 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,6 +1,17 @@ Changelog for python-chess ========================== +New in v1.3.2 +------------- + +Bugfixes: + +* Added a new reason for ``board.status()`` to be invalid: + ``chess.STATUS_IMPOSSIBLE_CHECK``. This detects positions where two sliding + pieces are giving check while also being aligned with the king + on the same rank, file, or diagonal. Such positions are impossible to reach, + break Stockfish, and maybe other engines. + New in v1.3.1 ------------- diff --git a/chess/__init__.py b/chess/__init__.py index a41d6ee92..cf9cf3bcf 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -26,7 +26,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.3.1" +__version__ = "1.3.2" import collections import copy From e0a588d4d5cf0db67e25a0c8a91be1b11053e1e8 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 14 Dec 2020 15:34:23 +0100 Subject: [PATCH 137/613] Avoid Piece.__hash__ collisions (fixes #711) --- chess/__init__.py | 2 +- test.py | 6 ++++++ 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/chess/__init__.py b/chess/__init__.py index cf9cf3bcf..e7739b212 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -435,7 +435,7 @@ def unicode_symbol(self, *, invert_color: bool = False) -> str: return UNICODE_PIECE_SYMBOLS[symbol] def __hash__(self) -> int: - return hash(self.piece_type * (self.color + 1)) + return (self.piece_type - 1) * 2 + self.color def __repr__(self) -> str: return f"Piece.from_symbol({self.symbol()!r})" diff --git a/test.py b/test.py index 433ca33f0..1c2a1929d 100755 --- a/test.py +++ b/test.py @@ -191,6 +191,12 @@ def test_from_symbol(self): self.assertEqual(black_queen.symbol(), "q") self.assertEqual(str(black_queen), "q") + def test_hash(self): + pieces = {chess.Piece.from_symbol(symbol) for symbol in "pnbrqkPNBRQK"} + self.assertEqual(len(pieces), 12) + hashes = {hash(piece) for piece in pieces} + self.assertEqual(hashes, set(range(12))) + class BoardTestCase(unittest.TestCase): From a379c96ad65046660b49d6892e4f6a1414ddda68 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 17 Dec 2020 16:01:38 +0100 Subject: [PATCH 138/613] Tweak icons for dark background (#713) --- docs/images/maia.png | Bin 3143 -> 18234 bytes docs/images/pettingzoo.png | Bin 3741 -> 14683 bytes 2 files changed, 0 insertions(+), 0 deletions(-) diff --git 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zczWk6NV=25sF%C<1VQ37XAJ4vjzsy<&mKLBSu+8BlwBwhi>@(Q~z&_JZ&a=tkaF*CHdX|>Q zvGVfrH=qOG(gZ}S`x3dRtrMpp7Fy=*II~p#)tZn9WLafN{)k*dA1b5+89cE zd*gor&+lz)0IDk#?tJCY$^mACeZu)$2k^$YiI+f;sFvCLM}s_E9d?3&guIr)i$uNt zlR^Dt02rPY6b1Mp&1OEw9WK4fWER({Gx!AA)ZN|P{`z{^Okm$JE%G$0G7FF?d`)LB zP0%ReBp83169y*r*SO_!h z04OMb3a%0jdDS0{{ZP;JQ@)ZN=X0JN0MfXRDKVY`V2r-rkHscNm3}mQxLzi^b GHRb=tEgd5O From 6c96fc3e2ee3dc71892c06f7d3701e55af25c923 Mon Sep 17 00:00:00 2001 From: Bartek Spitza <34445227+bartekspitza@users.noreply.github.com> Date: Sat, 19 Dec 2020 01:34:48 +0100 Subject: [PATCH 139/613] Slightly faster piece hash function --- chess/__init__.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/__init__.py b/chess/__init__.py index e7739b212..9414c978a 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -435,7 +435,7 @@ def unicode_symbol(self, *, invert_color: bool = False) -> str: return UNICODE_PIECE_SYMBOLS[symbol] def __hash__(self) -> int: - return (self.piece_type - 1) * 2 + self.color + return self.piece_type + (-1 if self.color else 5) def __repr__(self) -> str: return f"Piece.from_symbol({self.symbol()!r})" From 0890a7391ca8665d491ea88fda135b77e388bd92 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 19 Dec 2020 12:16:05 +0100 Subject: [PATCH 140/613] Implement Lichess winning chance model --- chess/engine.py | 42 ++++++++++++++++++++++++++++-------------- 1 file changed, 28 insertions(+), 14 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index de5ccd6ed..3d696e9c1 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -43,7 +43,7 @@ try: from typing import Literal - _WdlModel = Literal["sf12"] + _WdlModel = Literal["sf12", "lichess"] except ImportError: # Before Python 3.8. _WdlModel = str # type: ignore @@ -557,8 +557,10 @@ def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: >>> Cp(500).wdl().expectation() - Cp(300).wdl().expectation() # doctest: +ELLIPSIS 0.015... - :param model: Currently, the only implemented model is ``sf12``, the - win rate model used by Stockfish 12. + :param model: + * ``sf12``, the WDL model used by Stockfish 12. + * ``lichess``, the win rate model used by Lichess. + Does not use *ply*, and does not consider drawing chances. :param ply: The number of half-moves played since the starting position. Models may scale scores slightly differently based on this. Defaults to middle game. @@ -617,6 +619,18 @@ def __ge__(self, other: object) -> bool: return NotImplemented +def _sf12_wins(cp: int, *, ply: int) -> int: + # https://github.com/official-stockfish/Stockfish/blob/sf_12/src/uci.cpp#L198-L218 + m = min(240, max(ply, 0)) / 64 + a = (((-8.24404295 * m + 64.23892342) * m + -95.73056462) * m) + 153.86478679 + b = (((-3.37154371 * m + 28.44489198) * m + -56.67657741) * m) + 72.05858751 + x = min(1000, max(cp, -1000)) + return int(0.5 + 1000 / (1 + math.exp((a - x) / b))) + +def _lichess_winning_chance(cp: int) -> int: + return 1 / (1 + math.exp(-0.004 * cp)) + + class Cp(Score): """Centi-pawn score.""" @@ -630,19 +644,15 @@ def score(self, *, mate_score: Optional[int] = None) -> int: return self.cp def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: - wins = self._sf12_wins(ply=ply) - losses = (-self)._sf12_wins(ply=ply) + if model == "lichess": + wins = round(1000 * _lichess_winning_chance(self.cp)) + losses = 1000 - wins + else: + wins = _sf12_wins(self.cp, ply=ply) + losses = _sf12_wins(-self.cp, ply=ply) draws = 1000 - wins - losses return Wdl(wins, draws, losses) - def _sf12_wins(self, *, ply: int) -> int: - # https://github.com/official-stockfish/Stockfish/blob/sf_12/src/uci.cpp#L198-L218 - m = min(240, max(ply, 0)) / 64 - a = (((-8.24404295 * m + 64.23892342) * m + -95.73056462) * m) + 153.86478679 - b = (((-3.37154371 * m + 28.44489198) * m + -56.67657741) * m) + 72.05858751 - x = min(1000, max(self.cp, -1000)) - return int(0.5 + 1000 / (1 + math.exp((a - x) / b))) - def __str__(self) -> str: return f"+{self.cp:d}" if self.cp > 0 else str(self.cp) @@ -681,7 +691,11 @@ def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: return -mate_score - self.moves def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: - return Wdl(1000, 0, 0) if self.moves > 0 else Wdl(0, 0, 1000) + if model == "lichess": + cp = (21 - min(10, abs(self.moves))) * 100 + return Cp(cp if self.moves > 0 else -cp).wdl(model="lichess") + else: + return Wdl(1000, 0, 0) if self.moves > 0 else Wdl(0, 0, 1000) def __str__(self) -> str: return f"#+{self.moves}" if self.moves > 0 else f"#-{abs(self.moves)}" From 622bbc4add42df85e7e578fdd923145e0e15570f Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 19 Dec 2020 12:33:45 +0100 Subject: [PATCH 141/613] Clamp cp for Lichess WDL model --- chess/engine.py | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 3d696e9c1..6f92225de 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -627,7 +627,7 @@ def _sf12_wins(cp: int, *, ply: int) -> int: x = min(1000, max(cp, -1000)) return int(0.5 + 1000 / (1 + math.exp((a - x) / b))) -def _lichess_winning_chance(cp: int) -> int: +def _lichess_raw_winning_chance(cp: int) -> int: return 1 / (1 + math.exp(-0.004 * cp)) @@ -645,7 +645,7 @@ def score(self, *, mate_score: Optional[int] = None) -> int: def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: if model == "lichess": - wins = round(1000 * _lichess_winning_chance(self.cp)) + wins = round(1000 * _lichess_raw_winning_chance(max(-1000, min(self.cp, 1000)))) losses = 1000 - wins else: wins = _sf12_wins(self.cp, ply=ply) @@ -693,7 +693,8 @@ def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: if model == "lichess": cp = (21 - min(10, abs(self.moves))) * 100 - return Cp(cp if self.moves > 0 else -cp).wdl(model="lichess") + wins = round(1000 * _lichess_raw_winning_chance(cp)) + return Wdl(wins, 0, 1000 - wins) if self.moves > 0 else Wdl(1000 - wins, 0, wins) else: return Wdl(1000, 0, 0) if self.moves > 0 else Wdl(0, 0, 1000) From 5fc5e1840d37d2fa03a70a393bf1f1bbbc653ed1 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 19 Dec 2020 12:40:41 +0100 Subject: [PATCH 142/613] Simplify to _lichess_raw_wins --- chess/engine.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 6f92225de..b9f6619ea 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -627,8 +627,8 @@ def _sf12_wins(cp: int, *, ply: int) -> int: x = min(1000, max(cp, -1000)) return int(0.5 + 1000 / (1 + math.exp((a - x) / b))) -def _lichess_raw_winning_chance(cp: int) -> int: - return 1 / (1 + math.exp(-0.004 * cp)) +def _lichess_raw_wins(cp: int) -> int: + return round(1000 / (1 + math.exp(-0.004 * cp))) class Cp(Score): @@ -645,7 +645,7 @@ def score(self, *, mate_score: Optional[int] = None) -> int: def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: if model == "lichess": - wins = round(1000 * _lichess_raw_winning_chance(max(-1000, min(self.cp, 1000)))) + wins = _lichess_raw_wins(max(-1000, min(self.cp, 1000))) losses = 1000 - wins else: wins = _sf12_wins(self.cp, ply=ply) @@ -693,7 +693,7 @@ def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: if model == "lichess": cp = (21 - min(10, abs(self.moves))) * 100 - wins = round(1000 * _lichess_raw_winning_chance(cp)) + wins = _lichess_raw_wins(cp) return Wdl(wins, 0, 1000 - wins) if self.moves > 0 else Wdl(1000 - wins, 0, wins) else: return Wdl(1000, 0, 0) if self.moves > 0 else Wdl(0, 0, 1000) From 2887677348c8669b5943e107ebd675c0bead968e Mon Sep 17 00:00:00 2001 From: SzymonStasiowski Date: Thu, 24 Dec 2020 00:55:25 +0100 Subject: [PATCH 143/613] Fix wrong declaration in Options section The snippet is not working because in following lines "engine" is called instead of declared "protocol" --- docs/engine.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/engine.rst b/docs/engine.rst index f0517c392..7637c116e 100644 --- a/docs/engine.rst +++ b/docs/engine.rst @@ -210,7 +210,7 @@ Option(name='Hash', type='spin', default=16, min=1, max=131072, var=[]) import chess.engine async def main() -> None: - transport, protocol = await chess.engine.popen_uci("/usr/bin/stockfish") + transport, engine = await chess.engine.popen_uci("/usr/bin/stockfish") # Check available options. print(engine.options["Hash"]) From 4ae64a70259d682c19dd522bc16f54271a3f5863 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 26 Dec 2020 11:20:23 +0100 Subject: [PATCH 144/613] Extend STATUS_IMPOSSIBLE_CHECK to ep square alignment See https://github.com/official-stockfish/Stockfish/issues/3270. --- chess/__init__.py | 5 ++++- test.py | 2 ++ 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/chess/__init__.py b/chess/__init__.py index 9414c978a..e73a7d13c 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -3316,7 +3316,8 @@ def status(self) -> Status: errors |= STATUS_BAD_CASTLING_RIGHTS # En passant. - if self.ep_square != self._valid_ep_square(): + valid_ep_square = self._valid_ep_square() + if self.ep_square != valid_ep_square: errors |= STATUS_INVALID_EP_SQUARE # Side to move giving check. @@ -3329,6 +3330,8 @@ def status(self) -> Status: errors |= STATUS_TOO_MANY_CHECKERS elif popcount(checkers) == 2 and ray(lsb(checkers), msb(checkers)) & self.kings & ~self.promoted: errors |= STATUS_IMPOSSIBLE_CHECK + elif valid_ep_square is not None and any(ray(checker, valid_ep_square) & self.kings & ~self.promoted for checker in scan_reversed(checkers)): + errors |= STATUS_IMPOSSIBLE_CHECK return errors diff --git a/test.py b/test.py index 1c2a1929d..367ce24eb 100755 --- a/test.py +++ b/test.py @@ -1003,6 +1003,8 @@ def test_status(self): self.assertEqual(board.status(), chess.STATUS_IMPOSSIBLE_CHECK) board = chess.Board("5R2/2P5/8/4k3/8/3rK2r/8/8 w - - 0 1") self.assertEqual(board.status(), chess.STATUS_IMPOSSIBLE_CHECK) + board = chess.Board("8/8/8/1k6/3Pp3/8/8/4KQ2 b - d3 0 1") + self.assertEqual(board.status(), chess.STATUS_IMPOSSIBLE_CHECK) def test_one_king_movegen(self): board = chess.Board.empty() From 92ece07635fcd7bc1ce2d72c08f16e262374e2bd Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 26 Dec 2020 11:40:00 +0100 Subject: [PATCH 145/613] Fix impossible checkers considering wrong king --- chess/__init__.py | 5 +++-- test.py | 4 ++++ 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index e73a7d13c..e9f08b7ca 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -3326,11 +3326,12 @@ def status(self) -> Status: # More than the maximum number of possible checkers in the variant. checkers = self.checkers_mask() + our_kings = self.kings & self.occupied_co[self.turn] & ~self.promoted if popcount(checkers) > 2: errors |= STATUS_TOO_MANY_CHECKERS - elif popcount(checkers) == 2 and ray(lsb(checkers), msb(checkers)) & self.kings & ~self.promoted: + elif popcount(checkers) == 2 and ray(lsb(checkers), msb(checkers)) & our_kings: errors |= STATUS_IMPOSSIBLE_CHECK - elif valid_ep_square is not None and any(ray(checker, valid_ep_square) & self.kings & ~self.promoted for checker in scan_reversed(checkers)): + elif valid_ep_square is not None and any(ray(checker, valid_ep_square) & our_kings for checker in scan_reversed(checkers)): errors |= STATUS_IMPOSSIBLE_CHECK return errors diff --git a/test.py b/test.py index 367ce24eb..1eb6fa4c6 100755 --- a/test.py +++ b/test.py @@ -1006,6 +1006,10 @@ def test_status(self): board = chess.Board("8/8/8/1k6/3Pp3/8/8/4KQ2 b - d3 0 1") self.assertEqual(board.status(), chess.STATUS_IMPOSSIBLE_CHECK) + # Checkers aligned with opponent king are fine. + board = chess.Board("8/8/5k2/p1q5/PP1rp1P1/3P1N2/2RK1r2/5nN1 w - - 0 3") + self.assertEqual(board.status(), chess.STATUS_VALID) + def test_one_king_movegen(self): board = chess.Board.empty() board.set_piece_at(chess.A1, chess.Piece(chess.KING, chess.WHITE)) From aae85995dba9b2e769f963e964a92b7217414ede Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sun, 27 Dec 2020 15:04:36 +0100 Subject: [PATCH 146/613] Prepare 1.3.3 --- CHANGELOG.rst | 19 +++++++++++++++++++ chess/__init__.py | 2 +- 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 158e290ff..36c2d3b6e 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,6 +1,25 @@ Changelog for python-chess ========================== +New in v1.3.3 +------------- + +Bugfixes: + +* Fixed unintended collisions and optimized ``chess.Piece.__hash__()``. +* Fixed false-positive ``chess.STATUS_IMPOSSIBLE_CHECK`` if checkers are + aligned with other king. + +Changes: + +* Also detect ``chess.STATUS_IMPOSSIBLE_CHECK`` if checker is aligned with + en passant square and king. + +New features: + +* Implemented Lichess winning chance model for ``chess.engine.Score``: + ``score.wdl(model="lichess")``. + New in v1.3.2 ------------- diff --git a/chess/__init__.py b/chess/__init__.py index e9f08b7ca..d9983489c 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -26,7 +26,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.3.2" +__version__ = "1.3.3" import collections import copy From 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zcmX@2^H_U=1Sb+k85zsV%m4rX|M<-GJP<$0 z+uem(kjLi}kYn%Z;uvCaIypfiupwKNYtcjo=EJL4H9FLoVpazn5D@?IpPRFGK`+Dq w|DmrZUSNviT+qPp9Ld1t#C+kCUEaktaqI2v zgItFdco;5N{5t=O^VijPCK`v=9uN9lq&4ZXvee~ELW0IZ$F(Q11C4`&qGKN`S8UZ2 zJ|=Pc>+z6-Ww~+e=6I|2D$2+`U?A5;>o!x)Voco3+ zNXDYPG1mWg{7)^gsz+a96VAoh_e}{3f$L&m*nEJu{KNYl* Date: Fri, 1 Jan 2021 18:48:08 +0100 Subject: [PATCH 148/613] Add chess.pgn.GameNode.set_eval(..., depth) and eval_depth() (closes #718) --- chess/pgn.py | 19 +++++++++++++++---- test.py | 8 +++++--- 2 files changed, 20 insertions(+), 7 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index a5ea63549..a1efe21cb 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -126,7 +126,9 @@ \[%eval\s(?: \#([+-]?\d+) |([+-]?(?:\d{0,10}\.\d{1,2}|\d{1,10}\.?)) - )\] + )(?: + ,(\d+) + )?\] """, re.VERBOSE) ARROWS_REGEX = re.compile(r""" @@ -409,18 +411,27 @@ def eval(self) -> Optional[chess.engine.PovScore]: return chess.engine.PovScore(score if turn else -score, turn) - def set_eval(self, score: Optional[chess.engine.PovScore]) -> None: + def eval_depth(self) -> Optional[int]: + """ + Parses the first valid ``[%eval ...]`` annotation in the comment of + this node and returns the corresponding depth, if any. + """ + match = EVAL_REGEX.search(self.comment) + return int(match.group(3)) if match and match.group(3) else None + + def set_eval(self, score: Optional[chess.engine.PovScore], depth: Optional[int] = None) -> None: """ Replaces the first valid ``[%eval ...]`` annotation in the comment of this node or adds a new one. """ eval = "" if score is not None: + depth_suffix = "" if depth is None else f",{max(depth, 0):d}" cp = score.white().score() if cp is not None: - eval = f"[%eval {float(cp) / 100:.2f}]" + eval = f"[%eval {float(cp) / 100:.2f}{depth_suffix}]" elif score.white().mate(): - eval = f"[%eval #{score.white().mate()}]" + eval = f"[%eval #{score.white().mate()}{depth_suffix}]" self.comment, found = EVAL_REGEX.subn(eval, self.comment, count=1) diff --git a/test.py b/test.py index 1eb6fa4c6..7bb956a2c 100755 --- a/test.py +++ b/test.py @@ -2720,13 +2720,15 @@ def test_annotations(self): game.set_eval(chess.engine.PovScore(chess.engine.Cp(-80), chess.WHITE)) self.assertEqual(game.comment, "foo [%bar] baz [%clk 3:25:45] [%eval -0.80]") self.assertEqual(game.eval().white().score(), -80) - game.set_eval(chess.engine.PovScore(chess.engine.Mate(1), chess.WHITE)) - self.assertEqual(game.comment, "foo [%bar] baz [%clk 3:25:45] [%eval #1]") + self.assertEqual(game.eval_depth(), None) + game.set_eval(chess.engine.PovScore(chess.engine.Mate(1), chess.WHITE), 5) + self.assertEqual(game.comment, "foo [%bar] baz [%clk 3:25:45] [%eval #1,5]") self.assertEqual(game.eval().white().mate(), 1) + self.assertEqual(game.eval_depth(), 5) self.assertEqual(game.arrows(), []) game.set_arrows([(chess.A1, chess.A1), chess.svg.Arrow(chess.A1, chess.H1, color="red"), chess.svg.Arrow(chess.B1, chess.B8)]) - self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%eval #1]") + self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%eval #1,5]") arrows = game.arrows() self.assertEqual(len(arrows), 3) self.assertEqual(arrows[0].color, "green") From a635307deacbaed19bdf5b5b1e253fd9a05a707e Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 2 Jan 2021 11:59:21 +0100 Subject: [PATCH 149/613] Remove ModuleNotFoundError from README (kept in CHANGELOG) --- README.rst | 4 ---- 1 file changed, 4 deletions(-) diff --git a/README.rst b/README.rst index 9a4838c3d..ee0ed6692 100644 --- a/README.rst +++ b/README.rst @@ -65,10 +65,6 @@ Download and install the latest release: pip install chess -``ModuleNotFoundError: No module named 'chess'`` after upgrading from old -python-chess versions? ``pip install --force-reinstall chess`` -(due to `#680 `_) - `Documentation `__ -------------------------------------------------------------------- From 3257cf5096885452f35f4ea12d90c78be79a7be5 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 2 Jan 2021 19:27:19 +0100 Subject: [PATCH 150/613] Handle UCI lines with invalid UTF-8 (#726) --- chess/engine.py | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index b9f6619ea..2a02c7cac 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -988,11 +988,15 @@ def pipe_data_received(self, fd: int, data: Union[bytes, str]) -> None: line_bytes, self.buffer[fd] = self.buffer[fd].split(b"\n", 1) if line_bytes.endswith(b"\r"): line_bytes = line_bytes[:-1] - line = line_bytes.decode("utf-8") - if fd == 1: - self.loop.call_soon(self._line_received, line) + try: + line = line_bytes.decode("utf-8") + except UnicodeDecodeError as err: + LOGGER.warning("%s: >> %r (%s)", self, bytes(line_bytes), err) else: - self.loop.call_soon(self.error_line_received, line) + if fd == 1: + self.loop.call_soon(self._line_received, line) + else: + self.loop.call_soon(self.error_line_received, line) def error_line_received(self, line: str) -> None: LOGGER.warning("%s: stderr >> %s", self, line) From 52797d333901b2920bb336181573c10bcbd0c7c4 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 2 Jan 2021 21:20:40 +0100 Subject: [PATCH 151/613] Use asyncio.*events*.get_running_loop() for trio-asyncio/issues#83 (fixes #725) --- chess/engine.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 2a02c7cac..5109bfd8f 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -936,7 +936,7 @@ class Protocol(asyncio.SubprocessProtocol, metaclass=abc.ABCMeta): """Future: Exit code of the process.""" def __init__(self: ProtocolT) -> None: - self.loop = asyncio.get_running_loop() + self.loop = asyncio.events.get_running_loop() self.transport: Optional[asyncio.SubprocessTransport] = None self.buffer = { @@ -1195,7 +1195,7 @@ async def popen(cls: Type[ProtocolT], command: Union[str, List[str]], *, setpgrp popen_args["preexec_fn"] = os.setpgrp popen_args.update(kwargs) - return await asyncio.get_running_loop().subprocess_exec(cls, *command, **popen_args) # type: ignore + return await asyncio.events.get_running_loop().subprocess_exec(cls, *command, **popen_args) # type: ignore class CommandState(enum.Enum): From ba995cb1d0f5277dafc0a9e9423a5ffcec49e687 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 5 Jan 2021 22:40:54 +0100 Subject: [PATCH 152/613] Preemptively stop emphasizing "pure Python" (#722) --- README.rst | 8 ++++---- chess/__init__.py | 7 ++++--- 2 files changed, 8 insertions(+), 7 deletions(-) diff --git a/README.rst b/README.rst index ee0ed6692..297e9048c 100644 --- a/README.rst +++ b/README.rst @@ -1,5 +1,5 @@ -python-chess: a pure Python chess library -========================================= +python-chess: a chess library for Python +======================================== .. image:: https://github.com/niklasf/python-chess/workflows/Test/badge.svg :target: https://github.com/niklasf/python-chess/actions @@ -20,8 +20,8 @@ python-chess: a pure Python chess library Introduction ------------ -python-chess is a pure Python chess library with move generation, move -validation and support for common formats. This is the Scholar's mate in +python-chess is a chess library for Python, with move generation, +move validation, and support for common formats. This is the Scholar's mate in python-chess: .. code:: python diff --git a/chess/__init__.py b/chess/__init__.py index d9983489c..7e0308677 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -15,9 +15,10 @@ # along with this program. If not, see . """ -A pure Python chess library with move generation and validation, Polyglot -opening book probing, PGN reading and writing, Gaviota tablebase probing, -Syzygy tablebase probing and XBoard/UCI engine communication. +A chess library with move generation and validation, +Polyglot opening book probing, PGN reading and writing, +Gaviota tablebase probing, +Syzygy tablebase probing, and XBoard/UCI engine communication. """ from __future__ import annotations From f4eaa3d4f3626bae2fa295f8cbee6448ec76aef4 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 6 Jan 2021 20:11:55 +0100 Subject: [PATCH 153/613] Clarify comment regarding analysis timeout (fixes #728) --- chess/engine.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index 5109bfd8f..99ee94a31 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -2706,7 +2706,7 @@ def analysis(self, board: chess.Board, limit: Optional[Limit] = None, *, multipv with self._not_shut_down(): coro = asyncio.wait_for( self.protocol.analysis(board, limit, multipv=multipv, game=game, info=info, root_moves=root_moves, options=options), - self.timeout) # Analyis should start immediately + self.timeout) # Timeout until analysis is *started* future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop) return SimpleAnalysisResult(self, future.result()) From 5426ba58368633310fc6bd99bfa2042f9baa83c7 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 7 Jan 2021 12:25:41 +0100 Subject: [PATCH 154/613] Bump 2021 (closes #730) --- chess/__init__.py | 2 +- chess/engine.py | 2 +- chess/gaviota.py | 2 +- chess/pgn.py | 2 +- chess/polyglot.py | 2 +- chess/svg.py | 2 +- chess/syzygy.py | 2 +- chess/variant.py | 2 +- docs/conf.py | 2 +- setup.py | 2 +- test.py | 2 +- 11 files changed, 11 insertions(+), 11 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index 7e0308677..e17ce1e04 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -1,5 +1,5 @@ # This file is part of the python-chess library. -# Copyright (C) 2012-2020 Niklas Fiekas +# Copyright (C) 2012-2021 Niklas Fiekas # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by diff --git a/chess/engine.py b/chess/engine.py index 99ee94a31..7eb0b70fc 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1,5 +1,5 @@ # This file is part of the python-chess library. -# Copyright (C) 2012-2020 Niklas Fiekas +# Copyright (C) 2012-2021 Niklas Fiekas # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by diff --git a/chess/gaviota.py b/chess/gaviota.py index ff64f5957..360cc7120 100644 --- a/chess/gaviota.py +++ b/chess/gaviota.py @@ -1,6 +1,6 @@ # This file is part of the python-chess library. # Copyright (C) 2015 Jean-Noël Avila -# Copyright (C) 2015-2020 Niklas Fiekas +# Copyright (C) 2015-2021 Niklas Fiekas # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by diff --git a/chess/pgn.py b/chess/pgn.py index a1efe21cb..9c6b4f311 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -1,5 +1,5 @@ # This file is part of the python-chess library. -# Copyright (C) 2012-2020 Niklas Fiekas +# Copyright (C) 2012-2021 Niklas Fiekas # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by diff --git a/chess/polyglot.py b/chess/polyglot.py index eaec7b631..1562d5306 100644 --- a/chess/polyglot.py +++ b/chess/polyglot.py @@ -1,5 +1,5 @@ # This file is part of the python-chess library. -# Copyright (C) 2012-2020 Niklas Fiekas +# Copyright (C) 2012-2021 Niklas Fiekas # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by diff --git a/chess/svg.py b/chess/svg.py index 42b939c67..df69c5588 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -1,5 +1,5 @@ # This file is part of the python-chess library. -# Copyright (C) 2016-2020 Niklas Fiekas +# Copyright (C) 2016-2021 Niklas Fiekas # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by diff --git a/chess/syzygy.py b/chess/syzygy.py index 4f8a30813..8fe3df6a1 100644 --- a/chess/syzygy.py +++ b/chess/syzygy.py @@ -1,5 +1,5 @@ # This file is part of the python-chess library. -# Copyright (C) 2012-2020 Niklas Fiekas +# Copyright (C) 2012-2021 Niklas Fiekas # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by diff --git a/chess/variant.py b/chess/variant.py index 88f002b9d..23de858e8 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -1,5 +1,5 @@ # This file is part of the python-chess library. -# Copyright (C) 2016-2020 Niklas Fiekas +# Copyright (C) 2016-2021 Niklas Fiekas # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by diff --git a/docs/conf.py b/docs/conf.py index bf1f19db7..e3fe4f737 100644 --- a/docs/conf.py +++ b/docs/conf.py @@ -37,7 +37,7 @@ def get_type_hints(obj, globalns=None, localns=None): # General information about the project. project = "python-chess" -copyright = "2014–2020, Niklas Fiekas" +copyright = "2014–2021, Niklas Fiekas" # The version. version = chess.__version__ diff --git a/setup.py b/setup.py index 967e7d9c9..1bf8a4b7d 100755 --- a/setup.py +++ b/setup.py @@ -2,7 +2,7 @@ # -*- coding: utf-8 -*- # # This file is part of the python-chess library. -# Copyright (C) 2012-2020 Niklas Fiekas +# Copyright (C) 2012-2021 Niklas Fiekas # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by diff --git a/test.py b/test.py index 7bb956a2c..5d8ae213d 100755 --- a/test.py +++ b/test.py @@ -1,7 +1,7 @@ #!/usr/bin/env python3 # # This file is part of the python-chess library. -# Copyright (C) 2012-2020 Niklas Fiekas +# Copyright (C) 2012-2021 Niklas Fiekas # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by From 10538325e6f7330d229c7218ffdbca805a47abb3 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 8 Jan 2021 13:16:01 +0100 Subject: [PATCH 155/613] Revert "Use asyncio.*events*.get_running_loop() for trio-asyncio/issues#83 (fixes #725)" This reverts commit 52797d333901b2920bb336181573c10bcbd0c7c4. The issue is fixed in trio-asyncio v0.12.0 via python-trio/trio-asyncio@b93c32037804298b43cc8c089313a2ef82ca0c22, so the workaround is no longer required. --- chess/engine.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 7eb0b70fc..3a145135d 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -936,7 +936,7 @@ class Protocol(asyncio.SubprocessProtocol, metaclass=abc.ABCMeta): """Future: Exit code of the process.""" def __init__(self: ProtocolT) -> None: - self.loop = asyncio.events.get_running_loop() + self.loop = asyncio.get_running_loop() self.transport: Optional[asyncio.SubprocessTransport] = None self.buffer = { @@ -1195,7 +1195,7 @@ async def popen(cls: Type[ProtocolT], command: Union[str, List[str]], *, setpgrp popen_args["preexec_fn"] = os.setpgrp popen_args.update(kwargs) - return await asyncio.events.get_running_loop().subprocess_exec(cls, *command, **popen_args) # type: ignore + return await asyncio.get_running_loop().subprocess_exec(cls, *command, **popen_args) # type: ignore class CommandState(enum.Enum): From e1c1355e141593912ff2c144ae5ea22034c790f5 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 9 Jan 2021 18:17:30 +0100 Subject: [PATCH 156/613] Read and write millisecond %clk annotations (closes #727) --- chess/pgn.py | 13 +++++++------ test.py | 13 ++++++++++--- 2 files changed, 17 insertions(+), 9 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index 9c6b4f311..436472d15 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -120,7 +120,7 @@ SKIP_MOVETEXT_REGEX = re.compile(r""";|\{|\}""") -CLOCK_REGEX = re.compile(r"""\[%clk\s(\d+):(\d+):(\d+)\]""") +CLOCK_REGEX = re.compile(r"""\[%clk\s(\d+):(\d+):(\d+(?:\.\d*)?)\]""") EVAL_REGEX = re.compile(r""" \[%eval\s(?: @@ -492,7 +492,7 @@ def clock(self) -> Optional[float]: match = CLOCK_REGEX.search(self.comment) if match is None: return None - return int(match.group(1)) * 3600 + int(match.group(2)) * 60 + int(match.group(3)) + return int(match.group(1)) * 3600 + int(match.group(2)) * 60 + float(match.group(3)) def set_clock(self, seconds: Optional[float]) -> None: """ @@ -501,11 +501,12 @@ def set_clock(self, seconds: Optional[float]) -> None: """ clk = "" if seconds is not None: - seconds = max(0, round(seconds)) - hours = seconds // 3600 - minutes = seconds % 3600 // 60 + seconds = max(0, seconds) + hours = int(seconds // 3600) + minutes = int(seconds % 3600 // 60) seconds = seconds % 3600 % 60 - clk = f"[%clk {hours:d}:{minutes:02d}:{seconds:02d}]" + seconds_part = f"{seconds:06.3f}".rstrip("0").rstrip(".") + clk = f"[%clk {hours:d}:{minutes:02d}:{seconds_part}]" self.comment, found = CLOCK_REGEX.subn(clk, self.comment, count=1) diff --git a/test.py b/test.py index 5d8ae213d..230c7b0a1 100755 --- a/test.py +++ b/test.py @@ -2740,11 +2740,18 @@ def test_annotations(self): game.set_arrows([]) self.assertEqual(game.comment, "foo [%bar] baz") - game.set_clock(1.4) - self.assertEqual(game.clock(), 1) # Rounded + def test_float_clk(self): + game = chess.pgn.Game() + game.comment = "[%clk 0:00:01.234]" + self.assertEqual(game.clock(), 1.234) + + game.set_clock(6.54321) + self.assertEqual(game.comment, "[%clk 0:00:06.543]") + self.assertEqual(game.clock(), 6.543) game.set_clock(-70) - self.assertEqual(game.clock(), 0) # Clamped + self.assertEqual(game.comment, "[%clk 0:00:00]") # Clamped + self.assertEqual(game.clock(), 0) def test_node_turn(self): game = chess.pgn.Game() From b3dd0ea28d78e4165ea9edaf6b7cbbc996c714a7 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sun, 17 Jan 2021 15:39:19 +0100 Subject: [PATCH 157/613] Test king captures unmoved rook --- test.py | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/test.py b/test.py index 230c7b0a1..5ba984955 100755 --- a/test.py +++ b/test.py @@ -1667,6 +1667,14 @@ def test_is_irreversible(self): self.assertFalse(board.is_irreversible(board.parse_san("Rf1"))) self.assertFalse(board.is_irreversible(chess.Move.null())) + def test_king_captures_unmoved_rook(self): + board = chess.Board("8/8/8/B2p3Q/2qPp1P1/b7/2P2PkP/4K2R b K - 0 1") + move = board.parse_uci("g2h1") + self.assertFalse(board.is_castling(move)) + self.assertEqual(board.san(move), "Kxh1") + board.push(move) + self.assertEqual(board.fen(), "8/8/8/B2p3Q/2qPp1P1/b7/2P2P1P/4K2k w - - 0 2") + class LegalMoveGeneratorTestCase(unittest.TestCase): From 9eb6f52f2a9d3aea133c9f38fd171d1b6b9696cf Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 19 Jan 2021 20:34:42 +0100 Subject: [PATCH 158/613] Prepare changelog --- CHANGELOG.rst | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 36c2d3b6e..38c35404e 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,6 +1,23 @@ Changelog for python-chess ========================== +Upcoming in v1.3.4 +------------------ + +Bugfixes: + +* Recover from invalid UTF-8 sent by an UCI engine, by ignoring that + (and only that) line. + +New features: + +* Let ``chess.pgn.GameNode.eval()`` accept PGN comments like + ``[%eval 2.5,11]``, meaning 250 centipawns at depth 11. + Use ``chess.pgn.GameNode.eval_depth()`` and + ``chess.pgn.GameNode.set_eval(..., depth)`` to get and set the depth. +* Read and write PGN comments with millisecond precision + ``[%clk 1:23:45.678]``. + New in v1.3.3 ------------- From c06e8d3b443c7e34e75742f08c972ee654394be3 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 25 Jan 2021 13:19:16 +0100 Subject: [PATCH 159/613] Prepare 1.4.0 --- CHANGELOG.rst | 16 ++++++++-------- chess/__init__.py | 2 +- 2 files changed, 9 insertions(+), 9 deletions(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 38c35404e..24d945021 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,13 +1,8 @@ Changelog for python-chess ========================== -Upcoming in v1.3.4 ------------------- - -Bugfixes: - -* Recover from invalid UTF-8 sent by an UCI engine, by ignoring that - (and only that) line. +New in v1.4.0 +------------- New features: @@ -15,9 +10,14 @@ New features: ``[%eval 2.5,11]``, meaning 250 centipawns at depth 11. Use ``chess.pgn.GameNode.eval_depth()`` and ``chess.pgn.GameNode.set_eval(..., depth)`` to get and set the depth. -* Read and write PGN comments with millisecond precision +* Read and write PGN comments with millisecond precision like ``[%clk 1:23:45.678]``. +Changes: + +* Recover from invalid UTF-8 sent by an UCI engine, by ignoring that + (and only that) line. + New in v1.3.3 ------------- diff --git a/chess/__init__.py b/chess/__init__.py index e17ce1e04..925b26751 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -27,7 +27,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.3.3" +__version__ = "1.4.0" import collections import copy From a40f2e84139dd90c0cc9207c72f9b36f5454430b Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 1 Feb 2021 18:46:23 +0100 Subject: [PATCH 160/613] Prevent cancelling engine command multiple times (#732) --- chess/engine.py | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 3a145135d..1dc93961d 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1242,9 +1242,10 @@ def set_finished(self) -> None: self.finished.set_result(None) def _cancel(self, engine: ProtocolT) -> None: - assert self.state == CommandState.Active - self.state = CommandState.Cancelling - self.cancel(engine) + if self.state != CommandState.Cancelling: + assert self.state == CommandState.Active + self.state = CommandState.Cancelling + self.cancel(engine) def _start(self, engine: ProtocolT) -> None: assert self.state == CommandState.New From 07a08545c37be5638926b5c6f84d171209bcf202 Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Sat, 13 Feb 2021 14:17:45 -0800 Subject: [PATCH 161/613] Implement Xboard usermove feature --- chess/engine.py | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 1dc93961d..5eccdefd1 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1915,9 +1915,6 @@ def end(self, engine: XBoardProtocol) -> None: if not engine.features.get("sigterm", 1): LOGGER.warning("%s: Rejecting feature sigterm=0", engine) engine.send_line("rejected sigterm") - if engine.features.get("usermove", 0): - LOGGER.warning("%s: Rejecting feature usermove=1", engine) - engine.send_line("rejected usermove") if engine.features.get("san", 0): LOGGER.warning("%s: Rejecting feature san=1", engine) engine.send_line("rejected san") @@ -2012,7 +2009,8 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping) -> None for move in board.move_stack[common_stack_len:]: if not move: LOGGER.warning("Null move (in %s) may not be supported by all XBoard engines", self.board.fen()) - self.send_line(self.board.xboard(move)) + prefix = "usermove " if self.features.get("usermove", 0) else "" + self.send_line(prefix + self.board.xboard(move)) self.board.push(move) async def ping(self) -> None: From aa361fd8368a9db0abbcfa176e6ffdadb7982d3a Mon Sep 17 00:00:00 2001 From: salman69e27 Date: Fri, 19 Feb 2021 09:44:04 +0200 Subject: [PATCH 162/613] implement basic interactive viewer --- chess/interactive.py | 109 +++++++++++++++++++++++++++++++++++++++++++ chess/pgn.py | 4 ++ 2 files changed, 113 insertions(+) create mode 100644 chess/interactive.py diff --git a/chess/interactive.py b/chess/interactive.py new file mode 100644 index 000000000..fe706be62 --- /dev/null +++ b/chess/interactive.py @@ -0,0 +1,109 @@ +import chess.svg + + +class WidgetError(Exception): + """ + raised when ipywidgets is not installed + """ + + +class NotJupyter(Exception): + """ + raised when InteractiveViewer is instantiated from a non jupyter shell + """ + + +try: + from ipywidgets import Button, GridBox, Layout, HTML, Output + from IPython.display import display, clear_output +except ModuleNotFoundError: + raise WidgetError("You need to have ipywidgets installed and running from Jupyter") + + +class InteractiveViewer: + def __new__(cls, game): + jupyter = True + try: + if get_ipython().__class__.__name__ != "ZMQInteractiveShell": + jupyter = False + except NameError: + jupyter = False + + if not jupyter: + raise NotJupyter("The interactive viewer only runs in jupyter shell") + return object.__new__(cls) + + def __init__(self, game): + self.game = game + self.__board = game.board() + self.__moves = list(game.mainline_moves()) + self.__num_moves = len(self.__moves) + self.__next_move = 0 if self.__moves else None + self.__out = Output() + + def __next_click(self, _): + move = self.__moves[self.__next_move] + self.__next_move += 1 + self.__board.push(move) + self.show() + + def __prev_click(self, _): + self.__board.pop() + self.__next_move -= 1 + self.show() + + def __reset_click(self, _): + self.__board.reset() + self.__next_move = 0 + self.show() + + def show(self): + display(self.__out) + next_move = Button( + icon="step-forward", + layout=Layout(width="60px", grid_area="right"), + disabled=self.__next_move >= self.__num_moves, + ) + + prev_move = Button( + icon="step-backward", + layout=Layout(width="60px", grid_area="left"), + disabled=self.__next_move == 0, + ) + + reset = Button( + icon="stop", + layout=Layout(width="60px", grid_area="middle"), + disabled=self.__next_move == 0, + ) + next_move.on_click(self.__next_click) + prev_move.on_click(self.__prev_click) + reset.on_click(self.__reset_click) + + with self.__out: + grid_box = GridBox( + children=[next_move, prev_move, reset, self.svg], + layout=Layout( + width="395px", + grid_template_rows="90% 10%", + grid_template_areas=""" + "top top top top top" + ". left middle right ." + """, + ), + ) + clear_output() + display(grid_box) + + @property + def svg(self) -> HTML: + svg = chess.svg.board( + board=self.__board, + size=390, + lastmove=self.__board.peek() if self.__board.move_stack else None, + check=self.__board.king(self.__board.turn) + if self.__board.is_check() + else None, + ) + svg_widget = HTML(value=svg, layout=Layout(grid_area="top")) + return svg_widget diff --git a/chess/pgn.py b/chess/pgn.py index 436472d15..f6e00e7f0 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -738,6 +738,10 @@ def __init__(self, headers: Optional[Union[Mapping[str, str], Iterable[Tuple[str def board(self) -> chess.Board: return self.headers.board() + def interactive_viewer(self): + from chess.interactive import InteractiveViewer + return InteractiveViewer(self) + def ply(self) -> int: # Optimization: Parse FEN only for custom starting positions. return self.board().ply() if "FEN" in self.headers else 0 From 874dc9bb3cc72bf1fad8c4462f0ecce7dde507fe Mon Sep 17 00:00:00 2001 From: salman69e27 Date: Fri, 19 Feb 2021 12:32:19 +0200 Subject: [PATCH 163/613] move list in interactive viewer --- chess/interactive.py | 90 +++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 84 insertions(+), 6 deletions(-) diff --git a/chess/interactive.py b/chess/interactive.py index fe706be62..efc413358 100644 --- a/chess/interactive.py +++ b/chess/interactive.py @@ -14,7 +14,7 @@ class NotJupyter(Exception): try: - from ipywidgets import Button, GridBox, Layout, HTML, Output + from ipywidgets import Button, GridBox, Layout, HTML, Output, HBox, Select from IPython.display import display, clear_output except ModuleNotFoundError: raise WidgetError("You need to have ipywidgets installed and running from Jupyter") @@ -30,13 +30,17 @@ def __new__(cls, game): jupyter = False if not jupyter: - raise NotJupyter("The interactive viewer only runs in jupyter shell") + raise NotJupyter("The interactive viewer only runs in Jupyter shell") + return object.__new__(cls) def __init__(self, game): self.game = game self.__board = game.board() self.__moves = list(game.mainline_moves()) + self.__white_moves = [str(move) for (i, move) in enumerate(self.__moves) if i % 2 == 0] + self.__black_moves = [str(move) for (i, move) in enumerate(self.__moves) if i % 2 == 1] + self.__move_list_len = len(self.__white_moves) self.__num_moves = len(self.__moves) self.__next_move = 0 if self.__moves else None self.__out = Output() @@ -57,6 +61,30 @@ def __reset_click(self, _): self.__next_move = 0 self.show() + def __white_select_change(self, change): + new = change["new"] + if (isinstance(new, dict)) and ("index" in new): + target = new["index"] * 2 + self.__seek(target) + self.show() + + def __black_select_change(self, change): + new = change["new"] + if (isinstance(new, dict)) and ("index" in new): + target = new["index"] * 2 + 1 + self.__seek(target) + self.show() + + def __seek(self, target): + while self.__next_move <= target: + move = self.__moves[self.__next_move] + self.__next_move += 1 + self.__board.push(move) + + while self.__next_move > target + 1: + self.__board.pop() + self.__next_move -= 1 + def show(self): display(self.__out) next_move = Button( @@ -76,19 +104,69 @@ def show(self): layout=Layout(width="60px", grid_area="middle"), disabled=self.__next_move == 0, ) + + if self.__next_move == 0: + white_move = None + black_move = None + else: + white_move = ( + self.__white_moves[self.__next_move // 2] + if (self.__next_move % 2) == 1 + else None + ) + black_move = ( + self.__black_moves[self.__next_move // 2 - 1] + if (self.__next_move % 2) == 0 + else None + ) + + white_move_list = Select( + options=self.__white_moves, + value=white_move, + rows=max(self.__move_list_len, 24), + disabled=False, + layout=Layout(width="80px"), + ) + + black_move_list = Select( + options=self.__black_moves, + value=black_move, + rows=max(self.__move_list_len, 24), + disabled=False, + layout=Layout(width="80px"), + ) + + white_move_list.observe(self.__white_select_change) + black_move_list.observe(self.__black_select_change) + + move_number_width = 3 + len(str(self.__move_list_len)) * 10 + + move_number = Select( + options=range(1, self.__move_list_len + 1), + value=None, + disabled=True, + rows=max(self.__move_list_len, 24), + layout=Layout(width=f"{move_number_width}px"), + ) + + move_list = HBox( + [move_number, white_move_list, black_move_list], + layout=Layout(height="407px", grid_area="moves"), + ) + next_move.on_click(self.__next_click) prev_move.on_click(self.__prev_click) reset.on_click(self.__reset_click) with self.__out: grid_box = GridBox( - children=[next_move, prev_move, reset, self.svg], + children=[next_move, prev_move, reset, self.svg, move_list], layout=Layout( - width="395px", + width=f"{390+move_number_width+160}px", grid_template_rows="90% 10%", grid_template_areas=""" - "top top top top top" - ". left middle right ." + "top top top top top moves" + ". left middle right . moves" """, ), ) From 86c435058b5c765129901ae11c20c43b4f4cff97 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 20 Feb 2021 13:27:27 +0100 Subject: [PATCH 164/613] Update chess/interactive.py Wait to clear the area until the next display is made (reduces flicker) Co-authored-by: Doug Blank --- chess/interactive.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/interactive.py b/chess/interactive.py index efc413358..a834f4476 100644 --- a/chess/interactive.py +++ b/chess/interactive.py @@ -170,7 +170,7 @@ def show(self): """, ), ) - clear_output() + clear_output(wait=True) display(grid_box) @property From 7c08b2d1c6d57a4d845008e70ec4cb0b7005f899 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 20 Feb 2021 13:36:22 +0100 Subject: [PATCH 165/613] Postpone typing of new interactive module --- chess/interactive.py | 3 +++ chess/pgn.py | 5 +++-- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/chess/interactive.py b/chess/interactive.py index a834f4476..edeef3df0 100644 --- a/chess/interactive.py +++ b/chess/interactive.py @@ -1,3 +1,6 @@ +# TODO: Fix typing in this file. +# mypy: ignore-errors + import chess.svg diff --git a/chess/pgn.py b/chess/pgn.py index f6e00e7f0..0f449879e 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -738,9 +738,10 @@ def __init__(self, headers: Optional[Union[Mapping[str, str], Iterable[Tuple[str def board(self) -> chess.Board: return self.headers.board() - def interactive_viewer(self): + # TODO: Consider naming. + def interactive_viewer(self) -> Any: from chess.interactive import InteractiveViewer - return InteractiveViewer(self) + return InteractiveViewer(self) # type: ignore def ply(self) -> int: # Optimization: Parse FEN only for custom starting positions. From 1b21b80fb9b574085c245e1261b103cfa5cdcf6f Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 26 Feb 2021 13:13:31 +0100 Subject: [PATCH 166/613] Make interactive viewer private for now --- chess/{interactive.py => _interactive.py} | 0 chess/pgn.py | 4 ++-- 2 files changed, 2 insertions(+), 2 deletions(-) rename chess/{interactive.py => _interactive.py} (100%) diff --git a/chess/interactive.py b/chess/_interactive.py similarity index 100% rename from chess/interactive.py rename to chess/_interactive.py diff --git a/chess/pgn.py b/chess/pgn.py index 0f449879e..0be971c64 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -739,8 +739,8 @@ def board(self) -> chess.Board: return self.headers.board() # TODO: Consider naming. - def interactive_viewer(self) -> Any: - from chess.interactive import InteractiveViewer + def _interactive_viewer(self) -> Any: + from chess._interactive import InteractiveViewer return InteractiveViewer(self) # type: ignore def ply(self) -> int: From e5ea16f751bd59ac38ccc4e9e685ba5f827aa5cd Mon Sep 17 00:00:00 2001 From: Paul Philippov Date: Sun, 7 Mar 2021 18:59:59 -0500 Subject: [PATCH 167/613] Add animation of the last move. --- chess/svg.py | 54 +++++++++++++++++++++++++++++++++++++++------------- 1 file changed, 41 insertions(+), 13 deletions(-) diff --git a/chess/svg.py b/chess/svg.py index df69c5588..12fdf5253 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -233,6 +233,7 @@ def piece(piece: chess.Piece, size: Optional[int] = None) -> str: def board(board: Optional[chess.BaseBoard] = None, *, orientation: Color = chess.WHITE, lastmove: Optional[chess.Move] = None, + animation: bool = False, check: Optional[Square] = None, arrows: Iterable[Union[Arrow, Tuple[Square, Square]]] = [], squares: Optional[IntoSquareSet] = None, @@ -248,6 +249,7 @@ def board(board: Optional[chess.BaseBoard] = None, *, ``None`` (the default) for a chessboard without pieces. :param orientation: The point of view, defaulting to ``chess.WHITE``. :param lastmove: A :class:`chess.Move` to be highlighted. + :param animation: Pass ``True`` to animate lastmove. :param check: A square to be marked indicating a check. :param arrows: A list of :class:`~chess.svg.Arrow` objects, like ``[chess.svg.Arrow(chess.E2, chess.E4)]``, or a list of tuples, like @@ -299,6 +301,7 @@ def board(board: Optional[chess.BaseBoard] = None, *, if check is not None: defs.append(ET.fromstring(CHECK_GRADIENT)) + # Render coordinates. if coordinates: margin_color, margin_opacity = _color(colors, "margin") ET.SubElement(svg, "rect", _attrs({ @@ -309,7 +312,17 @@ def board(board: Optional[chess.BaseBoard] = None, *, "fill": margin_color, "opacity": margin_opacity if margin_opacity < 1.0 else None, })) + coord_color, coord_opacity = _color(colors, "coord") + for file_index, file_name in enumerate(chess.FILE_NAMES): + x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin + svg.append(_coord(file_name, x, 0, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity)) + svg.append(_coord(file_name, x, margin + 8 * SQUARE_SIZE, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity)) + for rank_index, rank_name in enumerate(chess.RANK_NAMES): + y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + margin + svg.append(_coord(rank_name, 0, y, margin, SQUARE_SIZE, False, margin, color=coord_color, opacity=coord_opacity)) + svg.append(_coord(rank_name, margin + 8 * SQUARE_SIZE, y, margin, SQUARE_SIZE, False, margin, color=coord_color, opacity=coord_opacity)) + # Render board. for square, bb in enumerate(chess.BB_SQUARES): file_index = chess.square_file(square) rank_index = chess.square_rank(square) @@ -335,6 +348,14 @@ def board(board: Optional[chess.BaseBoard] = None, *, "opacity": fill_opacity if fill_opacity < 1.0 else None, })) + # Render check mark. + for square, bb in enumerate(chess.BB_SQUARES): + file_index = chess.square_file(square) + rank_index = chess.square_rank(square) + + x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin + y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + margin + if square == check: ET.SubElement(svg, "rect", _attrs({ "x": x, @@ -345,15 +366,33 @@ def board(board: Optional[chess.BaseBoard] = None, *, "fill": "url(#check_gradient)", })) - # Render pieces. + # Render pieces. + for square, bb in enumerate(chess.BB_SQUARES): + file_index = chess.square_file(square) + rank_index = chess.square_rank(square) + + x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin + y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + margin + if board is not None: piece = board.piece_at(square) if piece: - ET.SubElement(svg, "use", { + z = ET.SubElement(svg, "use", { "xlink:href": f"#{chess.COLOR_NAMES[piece.color]}-{chess.PIECE_NAMES[piece.piece_type]}", "transform": f"translate({x:d}, {y:d})", }) + # Render animated move. + if animation: + if square == lastmove.to_square: + dx = int((math.fmod(lastmove.from_square, 8) - math.fmod(lastmove.to_square, 8)) * SQUARE_SIZE) + dy = (math.ceil(lastmove.to_square / 8) - math.ceil(lastmove.from_square / 8)) * SQUARE_SIZE + ET.SubElement(z, "animateMotion", { + "dur": f"1s", + "repeatCount": f"1", + "path": f"M{dx:d},{dy:d} 0,0", + }) + # Render selected squares. if squares is not None and square in squares: ET.SubElement(svg, "use", _attrs({ @@ -362,17 +401,6 @@ def board(board: Optional[chess.BaseBoard] = None, *, "y": y, })) - if coordinates: - coord_color, coord_opacity = _color(colors, "coord") - for file_index, file_name in enumerate(chess.FILE_NAMES): - x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin - svg.append(_coord(file_name, x, 0, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity)) - svg.append(_coord(file_name, x, margin + 8 * SQUARE_SIZE, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity)) - for rank_index, rank_name in enumerate(chess.RANK_NAMES): - y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + margin - svg.append(_coord(rank_name, 0, y, margin, SQUARE_SIZE, False, margin, color=coord_color, opacity=coord_opacity)) - svg.append(_coord(rank_name, margin + 8 * SQUARE_SIZE, y, margin, SQUARE_SIZE, False, margin, color=coord_color, opacity=coord_opacity)) - for arrow in arrows: try: tail, head, color = arrow.tail, arrow.head, arrow.color # type: ignore From 41b57724fc23a79aa6b70a9ea8920bbcaca868a9 Mon Sep 17 00:00:00 2001 From: Paul Philippov Date: Mon, 8 Mar 2021 00:28:20 -0500 Subject: [PATCH 168/613] fix mypy strict errors --- chess/svg.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/chess/svg.py b/chess/svg.py index 12fdf5253..24bd2e764 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -384,13 +384,13 @@ def board(board: Optional[chess.BaseBoard] = None, *, # Render animated move. if animation: - if square == lastmove.to_square: - dx = int((math.fmod(lastmove.from_square, 8) - math.fmod(lastmove.to_square, 8)) * SQUARE_SIZE) - dy = (math.ceil(lastmove.to_square / 8) - math.ceil(lastmove.from_square / 8)) * SQUARE_SIZE + if lastmove is not None and square == lastmove.to_square: + lmdx = (math.fmod(lastmove.from_square, 8) - math.fmod(lastmove.to_square, 8)) * SQUARE_SIZE + lmdy = (math.ceil(lastmove.to_square / 8) - math.ceil(lastmove.from_square / 8)) * SQUARE_SIZE ET.SubElement(z, "animateMotion", { "dur": f"1s", "repeatCount": f"1", - "path": f"M{dx:d},{dy:d} 0,0", + "path": f"M{lmdx:d},{lmdy:d} 0,0", }) # Render selected squares. From e981bd0c3aaa37aee87dcd1200461e9b30b1c639 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 11 Mar 2021 21:51:04 +0100 Subject: [PATCH 169/613] Revert animation of last move (#747) --- chess/svg.py | 41 ++++++++++++++--------------------------- 1 file changed, 14 insertions(+), 27 deletions(-) diff --git a/chess/svg.py b/chess/svg.py index 24bd2e764..7f4f935a9 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -233,7 +233,6 @@ def piece(piece: chess.Piece, size: Optional[int] = None) -> str: def board(board: Optional[chess.BaseBoard] = None, *, orientation: Color = chess.WHITE, lastmove: Optional[chess.Move] = None, - animation: bool = False, check: Optional[Square] = None, arrows: Iterable[Union[Arrow, Tuple[Square, Square]]] = [], squares: Optional[IntoSquareSet] = None, @@ -249,7 +248,6 @@ def board(board: Optional[chess.BaseBoard] = None, *, ``None`` (the default) for a chessboard without pieces. :param orientation: The point of view, defaulting to ``chess.WHITE``. :param lastmove: A :class:`chess.Move` to be highlighted. - :param animation: Pass ``True`` to animate lastmove. :param check: A square to be marked indicating a check. :param arrows: A list of :class:`~chess.svg.Arrow` objects, like ``[chess.svg.Arrow(chess.E2, chess.E4)]``, or a list of tuples, like @@ -349,24 +347,23 @@ def board(board: Optional[chess.BaseBoard] = None, *, })) # Render check mark. - for square, bb in enumerate(chess.BB_SQUARES): - file_index = chess.square_file(square) - rank_index = chess.square_rank(square) + if check is not None: + file_index = chess.square_file(check) + rank_index = chess.square_rank(check) x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + margin - if square == check: - ET.SubElement(svg, "rect", _attrs({ - "x": x, - "y": y, - "width": SQUARE_SIZE, - "height": SQUARE_SIZE, - "class": "check", - "fill": "url(#check_gradient)", - })) + ET.SubElement(svg, "rect", _attrs({ + "x": x, + "y": y, + "width": SQUARE_SIZE, + "height": SQUARE_SIZE, + "class": "check", + "fill": "url(#check_gradient)", + })) - # Render pieces. + # Render pieces and selected squares. for square, bb in enumerate(chess.BB_SQUARES): file_index = chess.square_file(square) rank_index = chess.square_rank(square) @@ -377,22 +374,11 @@ def board(board: Optional[chess.BaseBoard] = None, *, if board is not None: piece = board.piece_at(square) if piece: - z = ET.SubElement(svg, "use", { + ET.SubElement(svg, "use", { "xlink:href": f"#{chess.COLOR_NAMES[piece.color]}-{chess.PIECE_NAMES[piece.piece_type]}", "transform": f"translate({x:d}, {y:d})", }) - # Render animated move. - if animation: - if lastmove is not None and square == lastmove.to_square: - lmdx = (math.fmod(lastmove.from_square, 8) - math.fmod(lastmove.to_square, 8)) * SQUARE_SIZE - lmdy = (math.ceil(lastmove.to_square / 8) - math.ceil(lastmove.from_square / 8)) * SQUARE_SIZE - ET.SubElement(z, "animateMotion", { - "dur": f"1s", - "repeatCount": f"1", - "path": f"M{lmdx:d},{lmdy:d} 0,0", - }) - # Render selected squares. if squares is not None and square in squares: ET.SubElement(svg, "use", _attrs({ @@ -401,6 +387,7 @@ def board(board: Optional[chess.BaseBoard] = None, *, "y": y, })) + # Render arrows. for arrow in arrows: try: tail, head, color = arrow.tail, arrow.head, arrow.color # type: ignore From c979f06732a6d31df6fe8af486bb41ea0ad21d1c Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 11 Mar 2021 22:18:13 +0100 Subject: [PATCH 170/613] Ignore trailing space after ponder move (fixes #751) --- chess/engine.py | 4 ++-- test.py | 25 +++++++++++++++++++++++++ 2 files changed, 27 insertions(+), 2 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 5eccdefd1..e948d9034 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1763,12 +1763,12 @@ def _parse_uci_info(arg: str, root_board: chess.Board, selector: Info = INFO_ALL return info def _parse_uci_bestmove(board: chess.Board, args: str) -> BestMove: - tokens = args.split(None, 2) + tokens = args.split() move = None ponder = None - if tokens[0] not in ["(none)", "NULL"]: + if tokens and tokens[0] not in ["(none)", "NULL"]: try: # AnMon 5.75 uses uppercase letters to denote promotion types. move = board.push_uci(tokens[0].lower()) diff --git a/test.py b/test.py index 5ba984955..0386680c3 100755 --- a/test.py +++ b/test.py @@ -3182,6 +3182,31 @@ def test_uci_info(self): info = chess.engine._parse_uci_info("depth 1 seldepth 2 time 16 nodes 1 score cp 72 wdl 249 747 4 hashfull 0 nps 400 tbhits 0 multipv 1", board) self.assertEqual(info["wdl"], (249, 747, 4)) + def test_hiarcs_bestmove(self): + async def main(): + protocol = chess.engine.UciProtocol() + mock = chess.engine.MockTransport(protocol) + + mock.expect("uci", ["uciok"]) + await protocol.initialize() + + mock.expect("ucinewgame") + mock.expect("isready", ["readyok"]) + mock.expect("position fen QN4n1/6r1/3k4/8/b2K4/8/8/8 b - - 0 1") + mock.expect("go", [ + "info depth 1 seldepth 4 time 793 nodes 187 nps 235 score cp -40 pv g7g4 d4c3 string keep double space", + "bestmove g7g4 ponder d4c3 ", + ]) + result = await protocol.play(chess.Board("QN4n1/6r1/3k4/8/b2K4/8/8/8 b - - 0 1"), chess.engine.Limit(), info=chess.engine.INFO_ALL) + self.assertEqual(result.move, chess.Move.from_uci("g7g4")) + self.assertEqual(result.ponder, chess.Move.from_uci("d4c3")) + self.assertEqual(result.info["pv"], [chess.Move.from_uci("g7g4"), chess.Move.from_uci("d4c3")]) + self.assertEqual(result.info["string"], "keep double space") + mock.assert_done() + + asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy()) + asyncio.run(main()) + def test_xboard_options(self): async def main(): protocol = chess.engine.XBoardProtocol() From a23e90f8c33b1cb3af270657a04e1be002e791e0 Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Thu, 11 Mar 2021 19:29:22 -0800 Subject: [PATCH 171/613] Send Xboard level command in sudden death games Games with a base time limit but no moves to reset (Limit.remaining_moves) and no increment still require a level command. Since st and level are mutually exclusive, use the presence or absence of time-per-move (Limit.time) to decide which time control command to send. --- chess/engine.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 5eccdefd1..49c6869d8 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -2047,9 +2047,11 @@ def start(self, engine: XBoardProtocol) -> None: # Limit or time control. increment = limit.white_inc if board.turn else limit.black_inc - if limit.remaining_moves or increment: + if limit.time is not None: + engine.send_line(f"st {max(0.01, limit.time)}") + else: base_mins, base_secs = divmod(int((limit.white_clock if board.turn else limit.black_clock) or 0), 60) - engine.send_line(f"level {limit.remaining_moves or 0} {base_mins}:{base_secs:02d} {increment}") + engine.send_line(f"level {limit.remaining_moves or 0} {base_mins}:{base_secs:02d} {increment or 0}") if limit.nodes is not None: if limit.time is not None or limit.white_clock is not None or limit.black_clock is not None or increment is not None: @@ -2064,8 +2066,6 @@ def start(self, engine: XBoardProtocol) -> None: engine.send_line(f"st {max(1, int(limit.nodes))}") if limit.depth is not None: engine.send_line(f"sd {max(1, int(limit.depth))}") - if limit.time is not None: - engine.send_line(f"st {max(0.01, limit.time)}") if limit.white_clock is not None: engine.send_line("{} {}".format("time" if board.turn else "otim", max(1, int(limit.white_clock * 100)))) if limit.black_clock is not None: From 2b8ee3b3e5bec9945778beccbcce7581903c134a Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Thu, 11 Mar 2021 19:44:27 -0800 Subject: [PATCH 172/613] Fix order of time control messages in test.py --- test.py | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/test.py b/test.py index 5ba984955..d26eda2bb 100755 --- a/test.py +++ b/test.py @@ -3266,8 +3266,8 @@ async def main(): mock.expect("d2d4") mock.expect("g8f6") mock.expect("c2c4") - mock.expect("sd 17") mock.expect("st 1.5") + mock.expect("sd 17") mock.expect("nopost") mock.expect("easy") mock.expect("go", ["move e7e6"]) @@ -3279,8 +3279,8 @@ async def main(): board.pop() mock.expect("force") mock.expect("remove") - mock.expect("sd 17") mock.expect("st 1.5") + mock.expect("sd 17") mock.expect("nopost") mock.expect("easy") mock.expect("go", ["move c2c4"]) @@ -3294,8 +3294,8 @@ async def main(): mock.expect("force") mock.expect("remove") mock.expect("undo") - mock.expect("sd 17") mock.expect("st 1.5") + mock.expect("sd 17") mock.expect("nopost") mock.expect("easy") mock.expect("go", ["move d2d4"]) From 019efa8b866c871e09c763bb5603ad97c508c8e4 Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Tue, 16 Mar 2021 17:23:42 -0700 Subject: [PATCH 173/613] Use full move stack for UCI pondering --- chess/engine.py | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 4c7027916..26d2bbc25 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1581,9 +1581,10 @@ def _bestmove(self, engine: UciProtocol, arg: str) -> None: if ponder and best.move and best.ponder: self.pondering = True - engine.board.push(best.move) - engine.board.push(best.ponder) - engine._position(engine.board) + pondering_board = board.copy() + pondering_board.push(best.move) + pondering_board.push(best.ponder) + engine._position(pondering_board) engine._go(limit, ponder=True) if not self.pondering: From 149fb5acb6fcefff4b51ebbb4f19ba716f1ad2fd Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Tue, 16 Mar 2021 23:40:18 -0700 Subject: [PATCH 174/613] First step: call ponderhit when ponder move made --- chess/engine.py | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index 4c7027916..1cff25852 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1303,6 +1303,7 @@ def __init__(self) -> None: self.board = chess.Board() self.game: object = None self.first_game = True + self.ponder_move = None async def initialize(self) -> None: class UciInitializeCommand(BaseCommand[UciProtocol, None]): @@ -1530,6 +1531,8 @@ def _go(self, limit: Limit, *, root_moves: Optional[Iterable[chess.Move]] = None self.send_line(" ".join(builder)) async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult: + self.last_move = board.move_stack[-1] if board.move_stack else None + class UciPlayCommand(BaseCommand[UciProtocol, PlayResult]): def start(self, engine: UciProtocol) -> None: self.info: InfoDict = {} @@ -1581,10 +1584,13 @@ def _bestmove(self, engine: UciProtocol, arg: str) -> None: if ponder and best.move and best.ponder: self.pondering = True + engine.ponder_move = best.ponder engine.board.push(best.move) engine.board.push(best.ponder) engine._position(engine.board) engine._go(limit, ponder=True) + else: + engine.ponder_move = None if not self.pondering: self.end(engine) @@ -1593,7 +1599,10 @@ def end(self, engine: UciProtocol) -> None: self.set_finished() def cancel(self, engine: UciProtocol) -> None: - engine.send_line("stop") + if engine.ponder_move and engine.ponder_move == engine.last_move: + engine.send_line("ponderhit") + else: + engine.send_line("stop") def engine_terminated(self, engine: UciProtocol, exc: Exception) -> None: # Allow terminating engine while pondering. From 2b423b1dfc348ac27a34d1c4ac8f7b03dfbf7b4e Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Wed, 17 Mar 2021 00:15:16 -0700 Subject: [PATCH 175/613] Skip board setup if ponderhit --- chess/engine.py | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/chess/engine.py b/chess/engine.py index 1cff25852..42e5514de 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1304,6 +1304,7 @@ def __init__(self) -> None: self.game: object = None self.first_game = True self.ponder_move = None + self.ponderhit = False async def initialize(self) -> None: class UciInitializeCommand(BaseCommand[UciProtocol, None]): @@ -1548,6 +1549,10 @@ def start(self, engine: UciProtocol) -> None: engine._configure(options) + if engine.ponderhit: + engine.ponderhit = False + return + if engine.first_game or engine.game != game: engine.game = game engine._ucinewgame() @@ -1600,6 +1605,9 @@ def end(self, engine: UciProtocol) -> None: def cancel(self, engine: UciProtocol) -> None: if engine.ponder_move and engine.ponder_move == engine.last_move: + engine.ponderhit = True + engine.ponder_move = None + self.end(engine) engine.send_line("ponderhit") else: engine.send_line("stop") From f765558b2f510bac921f1df216bac3c959cc270c Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Wed, 17 Mar 2021 00:25:48 -0700 Subject: [PATCH 176/613] Reset ponder_move and ponderhit for ucinewgame --- chess/engine.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/chess/engine.py b/chess/engine.py index 42e5514de..5a87eb4ca 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1395,6 +1395,8 @@ def _isready(self) -> None: def _ucinewgame(self) -> None: self.send_line("ucinewgame") self.first_game = False + self.ponder_move = None + self.ponderhit = False def debug(self, on: bool = True) -> None: """ From 0dd06853283584c1ee169683212e02533dc3e128 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 17 Mar 2021 12:52:54 +0100 Subject: [PATCH 177/613] Do not ignore limit.time when sending XBoard level --- chess/engine.py | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 26d2bbc25..5e0c607bb 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -2047,11 +2047,10 @@ def start(self, engine: XBoardProtocol) -> None: engine._new(board, game, options) # Limit or time control. + clock = limit.white_clock if board.turn else limit.black_clock increment = limit.white_inc if board.turn else limit.black_inc - if limit.time is not None: - engine.send_line(f"st {max(0.01, limit.time)}") - else: - base_mins, base_secs = divmod(int((limit.white_clock if board.turn else limit.black_clock) or 0), 60) + if limit.remaining_moves or clock is not None or increment is not None: + base_mins, base_secs = divmod(int(clock) or 0, 60) engine.send_line(f"level {limit.remaining_moves or 0} {base_mins}:{base_secs:02d} {increment or 0}") if limit.nodes is not None: @@ -2065,6 +2064,8 @@ def start(self, engine: XBoardProtocol) -> None: engine.send_line("nps 1") engine.send_line(f"st {max(1, int(limit.nodes))}") + if limit.time is not None: + engine.send_line(f"st {max(0.01, limit.time)}") if limit.depth is not None: engine.send_line(f"sd {max(1, int(limit.depth))}") if limit.white_clock is not None: From 90587d1d3b674b98eccdfad63e28916f6a868ac8 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 17 Mar 2021 13:02:11 +0100 Subject: [PATCH 178/613] Fixup last commit: Handle None for clock --- chess/engine.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index 5e0c607bb..628daedae 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -2050,7 +2050,7 @@ def start(self, engine: XBoardProtocol) -> None: clock = limit.white_clock if board.turn else limit.black_clock increment = limit.white_inc if board.turn else limit.black_inc if limit.remaining_moves or clock is not None or increment is not None: - base_mins, base_secs = divmod(int(clock) or 0, 60) + base_mins, base_secs = divmod(int(clock or 0), 60) engine.send_line(f"level {limit.remaining_moves or 0} {base_mins}:{base_secs:02d} {increment or 0}") if limit.nodes is not None: From 37140d4145bb1619ed182d021a49921bbf666a9b Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Wed, 17 Mar 2021 18:08:30 -0700 Subject: [PATCH 179/613] Send ponderhit in next UciPlayCommand This is to make sure that the bestmove line is not missed between one command ending and the next beginning. --- chess/engine.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index 5a87eb4ca..d5af270df 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1553,6 +1553,7 @@ def start(self, engine: UciProtocol) -> None: if engine.ponderhit: engine.ponderhit = False + engine.send_line("ponderhit") return if engine.first_game or engine.game != game: @@ -1610,7 +1611,6 @@ def cancel(self, engine: UciProtocol) -> None: engine.ponderhit = True engine.ponder_move = None self.end(engine) - engine.send_line("ponderhit") else: engine.send_line("stop") From 43631b8c0cf718e3df1a24429c05eb4096a819c6 Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Wed, 17 Mar 2021 18:43:26 -0700 Subject: [PATCH 180/613] Adjust time used for pondering time The time between a move being received (whether by position or ponderhit) and bestmove being sent back is subtracted from the time in the initial Limit paramter in the play() call. If there is a clock increment, it is added to the ponder time. If there is a remaining_moves value in the limit, it is decremented. All of these operations should give the engine a good idea of the current state of the clock after picking a move. The only deficiency is that if remaining_moves becomes zero, then the ponder time will look like the time for the rest of the game. Although, since game periods are commonly 40 moves, this is still a decent approximation. --- chess/engine.py | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index c6d806074..3d6c5510a 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -19,6 +19,7 @@ import abc import asyncio import collections +import copy import concurrent.futures import contextlib import copy @@ -31,6 +32,7 @@ import subprocess import sys import threading +import time import typing import os import re @@ -1541,6 +1543,7 @@ def start(self, engine: UciProtocol) -> None: self.info: InfoDict = {} self.pondering = False self.sent_isready = False + self.start_time = time.perf_counter() if "UCI_AnalyseMode" in engine.options and "UCI_AnalyseMode" not in engine.target_config and all(name.lower() != "uci_analysemode" for name in options): engine._setoption("UCI_AnalyseMode", False) @@ -1597,7 +1600,22 @@ def _bestmove(self, engine: UciProtocol, arg: str) -> None: pondering_board.push(best.move) pondering_board.push(best.ponder) engine._position(pondering_board) - engine._go(limit, ponder=True) + + time_used = time.perf_counter() - self.start_time + ponder_limit = copy.copy(limit) + if pondering_board.turn == chess.WHITE: + if limit.white_clock: + ponder_limit.white_clock -= time_used + ponder_limit.white_clock += (limit.white_inc or 0.0) + else: + if limit.black_clock: + ponder_limit.black_clock -= time_used + ponder_limit.black_clock += (limit.black_inc or 0.0) + + if ponder_limit.remaining_moves: + ponder_limit.remaining_moves -= 1 + + engine._go(ponder_limit, ponder=True) else: engine.ponder_move = None From 53c186ed3c561ddfa5af2f4b73775fe8d92f433e Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Wed, 17 Mar 2021 19:08:31 -0700 Subject: [PATCH 181/613] Make ponder_move a UciPlayCommand field --- chess/engine.py | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 3d6c5510a..9cec9b2dc 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1305,7 +1305,6 @@ def __init__(self) -> None: self.board = chess.Board() self.game: object = None self.first_game = True - self.ponder_move = None self.ponderhit = False async def initialize(self) -> None: @@ -1397,7 +1396,6 @@ def _isready(self) -> None: def _ucinewgame(self) -> None: self.send_line("ucinewgame") self.first_game = False - self.ponder_move = None self.ponderhit = False def debug(self, on: bool = True) -> None: @@ -1542,6 +1540,7 @@ class UciPlayCommand(BaseCommand[UciProtocol, PlayResult]): def start(self, engine: UciProtocol) -> None: self.info: InfoDict = {} self.pondering = False + self.ponder_move = None self.sent_isready = False self.start_time = time.perf_counter() @@ -1595,7 +1594,7 @@ def _bestmove(self, engine: UciProtocol, arg: str) -> None: if ponder and best.move and best.ponder: self.pondering = True - engine.ponder_move = best.ponder + self.ponder_move = best.ponder pondering_board = board.copy() pondering_board.push(best.move) pondering_board.push(best.ponder) @@ -1617,7 +1616,7 @@ def _bestmove(self, engine: UciProtocol, arg: str) -> None: engine._go(ponder_limit, ponder=True) else: - engine.ponder_move = None + self.ponder_move = None if not self.pondering: self.end(engine) @@ -1626,9 +1625,8 @@ def end(self, engine: UciProtocol) -> None: self.set_finished() def cancel(self, engine: UciProtocol) -> None: - if engine.ponder_move and engine.ponder_move == engine.last_move: + if self.ponder_move and self.ponder_move == engine.last_move: engine.ponderhit = True - engine.ponder_move = None self.end(engine) else: engine.send_line("stop") From 6f36cd53ada058a48e03481bfb5e103b95055f1e Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Wed, 17 Mar 2021 19:30:34 -0700 Subject: [PATCH 182/613] Don't reference limit after copying --- chess/engine.py | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 9cec9b2dc..2046f8556 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1603,13 +1603,13 @@ def _bestmove(self, engine: UciProtocol, arg: str) -> None: time_used = time.perf_counter() - self.start_time ponder_limit = copy.copy(limit) if pondering_board.turn == chess.WHITE: - if limit.white_clock: + if ponder_limit.white_clock: ponder_limit.white_clock -= time_used - ponder_limit.white_clock += (limit.white_inc or 0.0) + ponder_limit.white_clock += (ponder_limit.white_inc or 0.0) else: - if limit.black_clock: + if ponder_limit.black_clock: ponder_limit.black_clock -= time_used - ponder_limit.black_clock += (limit.black_inc or 0.0) + ponder_limit.black_clock += (ponder_limit.black_inc or 0.0) if ponder_limit.remaining_moves: ponder_limit.remaining_moves -= 1 From aa4ef365c6e4f454667d088bf2af87d660ffb1b0 Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Wed, 17 Mar 2021 20:04:49 -0700 Subject: [PATCH 183/613] Use null Move for type consistency --- chess/engine.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 2046f8556..fef635d16 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1540,7 +1540,7 @@ class UciPlayCommand(BaseCommand[UciProtocol, PlayResult]): def start(self, engine: UciProtocol) -> None: self.info: InfoDict = {} self.pondering = False - self.ponder_move = None + self.ponder_move = chess.Move.null() self.sent_isready = False self.start_time = time.perf_counter() @@ -1616,7 +1616,7 @@ def _bestmove(self, engine: UciProtocol, arg: str) -> None: engine._go(ponder_limit, ponder=True) else: - self.ponder_move = None + self.ponder_move = chess.Move.null() if not self.pondering: self.end(engine) From 50811f2c522bd524c55ba93d85608f81b565da48 Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Wed, 24 Mar 2021 17:57:37 -0700 Subject: [PATCH 184/613] Both clocks need incrementing in go ponder The clock specs in a go ponder command represent the state of both clocks at the time the command is sent. The opponent's clock is incremented immediately (because it's now the opponent's turn) while the engine's clock will be incremented before the next call to play(). --- chess/engine.py | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index fef635d16..86072b6c4 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1602,14 +1602,13 @@ def _bestmove(self, engine: UciProtocol, arg: str) -> None: time_used = time.perf_counter() - self.start_time ponder_limit = copy.copy(limit) - if pondering_board.turn == chess.WHITE: - if ponder_limit.white_clock: + if ponder_limit.white_clock is not None or ponder_limit.black_clock is not None: + ponder_limit.white_clock += (ponder_limit.white_inc or 0.0) + ponder_limit.black_clock += (ponder_limit.black_inc or 0.0) + if pondering_board.turn == chess.WHITE: ponder_limit.white_clock -= time_used - ponder_limit.white_clock += (ponder_limit.white_inc or 0.0) - else: - if ponder_limit.black_clock: + else: ponder_limit.black_clock -= time_used - ponder_limit.black_clock += (ponder_limit.black_inc or 0.0) if ponder_limit.remaining_moves: ponder_limit.remaining_moves -= 1 From 4ab0e305fa3c73b4bf115ac1ebc03c0932905926 Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Wed, 24 Mar 2021 18:13:26 -0700 Subject: [PATCH 185/613] Fixup for Github checks Make sure values are not None before using them for math. --- chess/engine.py | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 86072b6c4..b20c49b3f 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1602,12 +1602,15 @@ def _bestmove(self, engine: UciProtocol, arg: str) -> None: time_used = time.perf_counter() - self.start_time ponder_limit = copy.copy(limit) - if ponder_limit.white_clock is not None or ponder_limit.black_clock is not None: + + if ponder_limit.white_clock is not None: ponder_limit.white_clock += (ponder_limit.white_inc or 0.0) - ponder_limit.black_clock += (ponder_limit.black_inc or 0.0) if pondering_board.turn == chess.WHITE: ponder_limit.white_clock -= time_used - else: + + if ponder_limit.black_clock is not None: + ponder_limit.black_clock += (ponder_limit.black_inc or 0.0) + if pondering_board.turn == chess.BLACK: ponder_limit.black_clock -= time_used if ponder_limit.remaining_moves: From a7eb0377f756acc575174171ac0568cb579db2eb Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Thu, 25 Mar 2021 17:11:13 -0700 Subject: [PATCH 186/613] Stop pondering when play() has `ponder=False` When the play() command has ponder=False (or defaulted to False), any previously started pondering should be stopped as well. --- chess/engine.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index b20c49b3f..26b750811 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1534,7 +1534,7 @@ def _go(self, limit: Limit, *, root_moves: Optional[Iterable[chess.Move]] = None self.send_line(" ".join(builder)) async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult: - self.last_move = board.move_stack[-1] if board.move_stack else None + self.last_move = board.move_stack[-1] if (ponder and board.move_stack) else chess.Move.null() class UciPlayCommand(BaseCommand[UciProtocol, PlayResult]): def start(self, engine: UciProtocol) -> None: From d7108842f162d5ed465382bcc87a2091e5210932 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 1 Apr 2021 19:07:14 +0200 Subject: [PATCH 187/613] Remove chess.pgn.ReverseMainline (fixes #763) This breaking change is a required bugfix, because __reversed__ is supposed to return an Iterator, not merely an Iterable. --- chess/pgn.py | 37 +++++-------------------------------- test.py | 1 - 2 files changed, 5 insertions(+), 33 deletions(-) diff --git a/chess/pgn.py b/chess/pgn.py index 0be971c64..d4e4c1316 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -945,8 +945,11 @@ def __iter__(self) -> Iterator[MainlineMapT]: node = node.variations[0] yield self.f(node) - def __reversed__(self) -> ReverseMainline[MainlineMapT]: - return ReverseMainline(self.start, self.f) + def __reversed__(self) -> Iterator[MainlineMapT]: + node = self.start.end() + while node.parent and node != self.start: + yield self.f(typing.cast(ChildNode, node)) + node = node.parent def accept(self, visitor: BaseVisitor[ResultT]) -> ResultT: node = self.start @@ -964,36 +967,6 @@ def __repr__(self) -> str: return f"" -class ReverseMainline(Generic[MainlineMapT]): - def __init__(self, stop: GameNode, f: Callable[[ChildNode], MainlineMapT]) -> None: - self.stop = stop - self.f = f - - self.length = 0 - node = stop - while node.variations: - node = node.variations[0] - self.length += 1 - self.end = node - - def __len__(self) -> int: - return self.length - - def __iter__(self) -> Iterator[MainlineMapT]: - node = self.end - while node.parent and node != self.stop: - yield self.f(typing.cast(ChildNode, node)) - node = node.parent - - def __reversed__(self) -> Mainline[MainlineMapT]: - return Mainline(self.stop, self.f) - - def __repr__(self) -> str: - return "".format( - id(self), - " ".join(ReverseMainline(self.stop, lambda node: node.move.uci()))) - - class BaseVisitor(abc.ABC, Generic[ResultT]): """ Base class for visitors. diff --git a/test.py b/test.py index 57d89bcd6..d8bb4c5cb 100755 --- a/test.py +++ b/test.py @@ -2597,7 +2597,6 @@ def test_mainline(self): self.assertEqual(list(game.mainline_moves()), moves) self.assertTrue(game.mainline_moves()) self.assertEqual(list(reversed(game.mainline_moves())), list(reversed(moves))) - self.assertEqual(len(reversed(game.mainline_moves())), 3) self.assertEqual(str(game.mainline_moves()), "1. d3 Nf6 2. e4") def test_lan(self): From a1eda7d2e9cf4b0d922c3955c00151e86a5e002d Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Thu, 1 Apr 2021 16:48:31 -0700 Subject: [PATCH 188/613] Stop pondering when changing games or options If a new game is started (game parameter is changed) or if the engine is reconfigured, stop pondering and start a new search for moves. --- chess/engine.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index 26b750811..1be165d4f 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1534,7 +1534,8 @@ def _go(self, limit: Limit, *, root_moves: Optional[Iterable[chess.Move]] = None self.send_line(" ".join(builder)) async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult: - self.last_move = board.move_stack[-1] if (ponder and board.move_stack) else chess.Move.null() + same_game = not self.first_game and game == self.game and not options + self.last_move = board.move_stack[-1] if (same_game and ponder and board.move_stack) else chess.Move.null() class UciPlayCommand(BaseCommand[UciProtocol, PlayResult]): def start(self, engine: UciProtocol) -> None: From eac9ef9d0f3e4fd64ac8df22eb22351f21e67fe4 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 5 Apr 2021 22:08:55 +0200 Subject: [PATCH 189/613] Fix analysis should reset Ponder option --- chess/engine.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/chess/engine.py b/chess/engine.py index 628daedae..30e66e9fb 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1609,6 +1609,8 @@ def start(self, engine: UciProtocol) -> None: self.analysis = AnalysisResult(stop=lambda: self.cancel(engine)) self.sent_isready = False + if "Ponder" in engine.options: + engine._setoption("Ponder", False) if "UCI_AnalyseMode" in engine.options and "UCI_AnalyseMode" not in engine.target_config and all(name.lower() != "uci_analysemode" for name in options): engine._setoption("UCI_AnalyseMode", True) if "MultiPV" in engine.options or (multipv and multipv > 1): From cc5eef1e0658ee6529cc91affb1d6be9ccc549cc Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 5 Apr 2021 22:19:00 +0200 Subject: [PATCH 190/613] Test and fix extra stop on play after analyse --- chess/engine.py | 8 +++----- test.py | 28 ++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+), 5 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 30e66e9fb..e699624ab 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1023,14 +1023,11 @@ async def communicate(self: ProtocolT, command_factory: Callable[[], BaseCommand if self.next_command is not None: self.next_command.result.cancel() self.next_command.finished.cancel() - self.next_command._done() + self.next_command.set_finished() self.next_command = command def previous_command_finished(_: Optional[asyncio.Future[None]]) -> None: - if self.command is not None: - self.command._done() - self.command, self.next_command = self.next_command, None if self.command is not None: cmd = self.command @@ -1240,9 +1237,10 @@ def set_finished(self) -> None: if not self.result.done(): self.result.set_exception(EngineError(f"engine command finished before returning result: {self!r}")) self.finished.set_result(None) + self.state = CommandState.Done def _cancel(self, engine: ProtocolT) -> None: - if self.state != CommandState.Cancelling: + if self.state != CommandState.Cancelling and self.state != CommandState.Done: assert self.state == CommandState.Active self.state = CommandState.Cancelling self.cancel(engine) diff --git a/test.py b/test.py index d8bb4c5cb..2a2e31d39 100755 --- a/test.py +++ b/test.py @@ -3120,6 +3120,34 @@ async def main(): asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy()) asyncio.run(main()) + def test_uci_play_after_analyse(self): + async def main(): + protocol = chess.engine.UciProtocol() + mock = chess.engine.MockTransport(protocol) + + # Initialize. + mock.expect("uci", ["uciok"]) + await protocol.initialize() + + # Ponder. + board = chess.Board() + mock.expect("ucinewgame") + mock.expect("isready", ["readyok"]) + mock.expect("position startpos") + mock.expect("go depth 20", ["bestmove a2a4 ponder a7a5"]) + info = await protocol.analyse(board, chess.engine.Limit(depth=20)) + self.assertEqual(info, {}) + + # Play. + mock.expect("position startpos") + mock.expect("go movetime 3000", ["bestmove a2a4 ponder a7a5"]) + await protocol.play(board, chess.engine.Limit(time=3)) + + mock.assert_done() + + asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy()) + asyncio.run(main()) + def test_uci_info(self): # Info: refutation. board = chess.Board("8/8/6k1/8/8/8/1K6/3B4 w - - 0 1") From aa1d28faff86f4d639f24e88a38c1a82a12ef093 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 5 Apr 2021 23:25:46 +0200 Subject: [PATCH 191/613] Misc ponderhit fixes and cleanup * Add test case. * Compare position, not only last move. * Fix interaction with lazy options. * Fix lingering last_move when command is cancelled before being initialized. --- chess/engine.py | 62 ++++++++++++++++++------------------ test.py | 84 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 116 insertions(+), 30 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 292936fd8..b91b2f840 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1014,8 +1014,8 @@ def _line_received(self: ProtocolT, line: str) -> None: def line_received(self, line: str) -> None: pass - async def communicate(self: ProtocolT, command_factory: Callable[[], BaseCommand[ProtocolT, T]]) -> T: - command = command_factory() + async def communicate(self: ProtocolT, command_factory: Callable[[ProtocolT], BaseCommand[ProtocolT, T]]) -> T: + command = command_factory(self) if self.returncode.done(): raise EngineTerminatedError(f"engine process dead (exit code: {self.returncode.result()})") @@ -1205,7 +1205,7 @@ class CommandState(enum.Enum): class BaseCommand(Generic[ProtocolT, T]): - def __init__(self) -> None: + def __init__(self, engine: ProtocolT) -> None: self.state = CommandState.New self.result: asyncio.Future[T] = asyncio.Future() @@ -1256,10 +1256,6 @@ def _start(self, engine: ProtocolT) -> None: except EngineError as err: self._handle_exception(engine, err) - def _done(self) -> None: - assert self.state != CommandState.Done - self.state = CommandState.Done - def _line_received(self, engine: ProtocolT, line: str) -> None: assert self.state in [CommandState.Active, CommandState.Cancelling] try: @@ -1303,6 +1299,7 @@ def __init__(self) -> None: self.board = chess.Board() self.game: object = None self.first_game = True + self.may_ponderhit: Optional[chess.Board] = None self.ponderhit = False async def initialize(self) -> None: @@ -1420,6 +1417,9 @@ def line_received(self, engine: UciProtocol, line: str) -> None: return await self.communicate(UciPingCommand) + def _changed_options(self, options: ConfigMapping) -> bool: + return any(value is None or value != self.config.get(name) for name, value in collections.ChainMap(options, self.target_config).items()) + def _setoption(self, name: str, value: ConfigValue) -> None: try: value = self.options[name].parse(value) @@ -1536,13 +1536,25 @@ async def play(self, board: chess.Board, limit: Limit, *, game: object = None, i self.last_move = board.move_stack[-1] if (same_game and ponder and board.move_stack) else chess.Move.null() class UciPlayCommand(BaseCommand[UciProtocol, PlayResult]): + def __init__(self, engine): + super().__init__(engine) + + # May ponderhit only in the same game and with unchanged target + # options. The managed options UCI_AnalyseMode, Ponder, and + # MultiPV never change between pondering play commands. + engine.may_ponderhit = board if ponder and not engine.first_game and game == engine.game and not engine._changed_options(options) else None + def start(self, engine: UciProtocol) -> None: self.info: InfoDict = {} - self.pondering = False - self.ponder_move = chess.Move.null() + self.pondering: Optional[chess.Board] = None self.sent_isready = False self.start_time = time.perf_counter() + if engine.ponderhit: + engine.ponderhit = False + engine.send_line("ponderhit") + return + if "UCI_AnalyseMode" in engine.options and "UCI_AnalyseMode" not in engine.target_config and all(name.lower() != "uci_analysemode" for name in options): engine._setoption("UCI_AnalyseMode", False) if "Ponder" in engine.options: @@ -1552,11 +1564,6 @@ def start(self, engine: UciProtocol) -> None: engine._configure(options) - if engine.ponderhit: - engine.ponderhit = False - engine.send_line("ponderhit") - return - if engine.first_game or engine.game != game: engine.game = game engine._ucinewgame() @@ -1586,47 +1593,42 @@ def _info(self, engine: UciProtocol, arg: str) -> None: def _bestmove(self, engine: UciProtocol, arg: str) -> None: if self.pondering: - self.pondering = False + self.pondering = None elif not self.result.cancelled(): best = _parse_uci_bestmove(engine.board, arg) self.result.set_result(PlayResult(best.move, best.ponder, self.info)) if ponder and best.move and best.ponder: - self.pondering = True - self.ponder_move = best.ponder - pondering_board = board.copy() - pondering_board.push(best.move) - pondering_board.push(best.ponder) - engine._position(pondering_board) + self.pondering = board.copy() + self.pondering.push(best.move) + self.pondering.push(best.ponder) + engine._position(self.pondering) + # Adjust clocks for pondering. time_used = time.perf_counter() - self.start_time ponder_limit = copy.copy(limit) - if ponder_limit.white_clock is not None: ponder_limit.white_clock += (ponder_limit.white_inc or 0.0) - if pondering_board.turn == chess.WHITE: + if self.pondering.turn == chess.WHITE: ponder_limit.white_clock -= time_used - if ponder_limit.black_clock is not None: ponder_limit.black_clock += (ponder_limit.black_inc or 0.0) - if pondering_board.turn == chess.BLACK: + if self.pondering.turn == chess.BLACK: ponder_limit.black_clock -= time_used - if ponder_limit.remaining_moves: ponder_limit.remaining_moves -= 1 engine._go(ponder_limit, ponder=True) - else: - self.ponder_move = chess.Move.null() if not self.pondering: self.end(engine) def end(self, engine: UciProtocol) -> None: + engine.may_ponderhit = None self.set_finished() def cancel(self, engine: UciProtocol) -> None: - if self.ponder_move and self.ponder_move == engine.last_move: + if engine.may_ponderhit and self.pondering and engine.may_ponderhit.move_stack == self.pondering.move_stack and engine.may_ponderhit == self.pondering: engine.ponderhit = True self.end(engine) else: @@ -2701,7 +2703,7 @@ async def _get() -> Mapping[str, str]: future = asyncio.run_coroutine_threadsafe(_get(), self.protocol.loop) return future.result() - def communicate(self, command_factory: Callable[[], BaseCommand[Protocol, T]]) -> T: + def communicate(self, command_factory: Callable[[Protocol], BaseCommand[Protocol, T]]) -> T: with self._not_shut_down(): coro = self.protocol.communicate(command_factory) future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop) diff --git a/test.py b/test.py index 2a2e31d39..383e5101c 100755 --- a/test.py +++ b/test.py @@ -3148,6 +3148,90 @@ async def main(): asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy()) asyncio.run(main()) + def test_uci_ponderhit(self): + async def main(): + protocol = chess.engine.UciProtocol() + mock = chess.engine.MockTransport(protocol) + + # Initialize. + mock.expect("uci", [ + "option name Hash type spin default 16 min 1 max 33554432", + "option name Ponder type check default false", + "uciok", + ]) + await protocol.initialize() + + # First search. + mock.expect("setoption name Ponder value true") + mock.expect("ucinewgame") + mock.expect("isready", ["readyok"]) + mock.expect("position startpos") + mock.expect("go movetime 1000", ["bestmove d2d4 ponder g8f6"]) + mock.expect("position startpos moves d2d4 g8f6") + mock.expect("go ponder movetime 1000") + board = chess.Board() + result = await protocol.play(board, chess.engine.Limit(time=1), ponder=True) + self.assertEqual(result.move, chess.Move.from_uci("d2d4")) + self.assertEqual(result.ponder, chess.Move.from_uci("g8f6")) + + # Ponderhit. + board.push(result.move) + board.push(result.ponder) + mock.expect("ponderhit", ["bestmove c2c4 ponder e7e6"]) + mock.expect("position startpos moves d2d4 g8f6 c2c4 e7e6") + mock.expect("go ponder movetime 2000") + result = await protocol.play(board, chess.engine.Limit(time=2), ponder=True) + self.assertEqual(result.move, chess.Move.from_uci("c2c4")) + self.assertEqual(result.ponder, chess.Move.from_uci("e7e6")) + + # Ponderhit prevented by changed option. + board.push(result.move) + board.push(result.ponder) + mock.expect("stop", ["bestmove g2g3 ponder f8b4"]) + mock.expect("setoption name Hash value 32") + mock.expect("position startpos moves d2d4 g8f6 c2c4 e7e6") + mock.expect("go movetime 3000", ["bestmove b1c3 ponder f8b4"]) + mock.expect("position startpos moves d2d4 g8f6 c2c4 e7e6 b1c3 f8b4") + mock.expect("go ponder movetime 3000") + result = await protocol.play(board, chess.engine.Limit(time=3), ponder=True, options={"Hash": 32}) + self.assertEqual(result.move, chess.Move.from_uci("b1c3")) + self.assertEqual(result.ponder, chess.Move.from_uci("f8b4")) + + # Ponderhit prevented by reverted option. + board.push(result.move) + board.push(result.ponder) + mock.expect("stop", ["bestmove e2e3 ponder e8g8"]) + mock.expect("setoption name Hash value 16") + mock.expect("position startpos moves d2d4 g8f6 c2c4 e7e6 b1c3 f8b4") + mock.expect("go movetime 3000", ["bestmove d1c2 ponder d7d5"]) + mock.expect("position startpos moves d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5") + mock.expect("go ponder movetime 3000") + result = await protocol.play(board, chess.engine.Limit(time=3), ponder=True) + self.assertEqual(result.move, chess.Move.from_uci("d1c2")) + self.assertEqual(result.ponder, chess.Move.from_uci("d7d5")) + + # Interject analysis. + board.push(result.move) + board.push(result.ponder) + mock.expect("stop", ["bestmove c4d5 ponder e6d5"]) + mock.expect("setoption name Ponder value false") + mock.expect("position startpos moves d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5") + mock.expect("go movetime 4000", ["bestmove c4d5 ponder e6d5"]) + await protocol.analyse(board, chess.engine.Limit(time=4)) + + # Interjected analysis prevents ponderhit. + mock.expect("setoption name Ponder value true") + mock.expect("position startpos moves d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5") + mock.expect("go movetime 5000", ["bestmove c4d5 ponder e6d5"]) + mock.expect("position startpos moves d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 c4d5 e6d5") + mock.expect("go ponder movetime 5000") + await protocol.play(board, chess.engine.Limit(time=5), ponder=True) + + mock.assert_done() + + asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy()) + asyncio.run(main()) + def test_uci_info(self): # Info: refutation. board = chess.Board("8/8/6k1/8/8/8/1K6/3B4 w - - 0 1") From 3819e318c620933742d62a5655efa414ce933a73 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 5 Apr 2021 23:33:57 +0200 Subject: [PATCH 192/613] Fix missing type annotation --- chess/engine.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index b91b2f840..d6d4e8876 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1536,7 +1536,7 @@ async def play(self, board: chess.Board, limit: Limit, *, game: object = None, i self.last_move = board.move_stack[-1] if (same_game and ponder and board.move_stack) else chess.Move.null() class UciPlayCommand(BaseCommand[UciProtocol, PlayResult]): - def __init__(self, engine): + def __init__(self, engine: UciProtocol): super().__init__(engine) # May ponderhit only in the same game and with unchanged target From 32b285956909bb7a17c16471fc78f47ceb0d5121 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 6 Apr 2021 00:33:07 +0200 Subject: [PATCH 193/613] Add experimental chess.Board.outcome() (fixes #765) --- README.rst | 4 +- chess/__init__.py | 131 +++++++++++++++++++++++++++------------------- docs/core.rst | 9 ++++ 3 files changed, 89 insertions(+), 55 deletions(-) diff --git a/README.rst b/README.rst index 297e9048c..6dc9761ad 100644 --- a/README.rst +++ b/README.rst @@ -130,8 +130,8 @@ Features False >>> board.is_insufficient_material() False - >>> board.is_game_over() - True + >>> board.outcome() + Outcome(end=, winner=True) * Detects repetitions. Has a half-move clock. diff --git a/chess/__init__.py b/chess/__init__.py index 925b26751..5007f89f3 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -103,7 +103,6 @@ class Status(enum.IntFlag): TOO_MANY_CHECKERS = 1 << 15 IMPOSSIBLE_CHECK = 1 << 16 - STATUS_VALID = Status.VALID STATUS_NO_WHITE_KING = Status.NO_WHITE_KING STATUS_NO_BLACK_KING = Status.NO_BLACK_KING @@ -124,6 +123,48 @@ class Status(enum.IntFlag): STATUS_IMPOSSIBLE_CHECK = Status.IMPOSSIBLE_CHECK +class GameEnd(enum.Enum): + """Reasons for a game to be over.""" + + Checkmate = 1 + """See :func:`chess.Board.is_checkmate()`.""" + Stalemate = 2 + """See :func:`chess.Board.is_stalemate()`.""" + InsufficientMaterial = 3 + """See :func:`chess.Board.is_insufficient_material()`.""" + SeventyfiveMoves = 4 + """See :func:`chess.Board.is_seventyfive_moves()`.""" + FivefoldRepetition = 5 + """See :func:`chess.Board.is_fivefold_repetition()`.""" + FiftyMoves = 6 + """See :func:`chess.Board.can_claim_fifty_moves()`.""" + ThreefoldRepetition = 7 + """See :func:`chess.Board.can_claim_threefold_repetition()`.""" + VariantWin = 8 + """See :func:`chess.Board.is_variant_win()`.""" + VariantLoss = 9 + """See :func:`chess.Board.is_variant_loss()`.""" + VariantDraw = 10 + """See :func:`chess.Board.is_variant_draw()`.""" + +@dataclasses.dataclass +class Outcome: + """ + Information about the outcome of an ended game, usually obtained from + :func:`chess.Board.outcome()`. + """ + + end: GameEnd + """The reason for the game to have ended.""" + + winner: Optional[Color] + """The winning color or ``None`` if drawn.""" + + def result(self): + """Returns ``1-0``, ``0-1`` or ``1/2-1/2``.""" + return "1/2-1/2" if self.winner is None else ("1-0" if self.winner else "0-1") + + Square = int SQUARES = [ A1, B1, C1, D1, E1, F1, G1, H1, @@ -1824,14 +1865,25 @@ def is_variant_draw(self) -> bool: return False def is_game_over(self, *, claim_draw: bool = False) -> bool: + return self.outcome(claim_draw=claim_draw) is not None + + def result(self, *, claim_draw: bool = False) -> str: + outcome = self.outcome(claim_draw=claim_draw) + return outcome.result() if outcome else "*" + + def outcome(self, *, claim_draw: bool = False) -> Optional[Outcome]: """ Checks if the game is over due to :func:`checkmate `, :func:`stalemate `, :func:`insufficient material `, the :func:`seventyfive-move rule `, - :func:`fivefold repetition ` + :func:`fivefold repetition `, or a :func:`variant end condition `. + Returns the :class:`chess.Outcome` if the game has ended or ``None``. + + Alternatively, use :func:`~chess.Board.is_game_over()` if you are not + interested in who won the game and why. The game is not considered to be over by the :func:`fifty-move rule ` or @@ -1839,63 +1891,36 @@ def is_game_over(self, *, claim_draw: bool = False) -> bool: unless *claim_draw* is given. Note that checking the latter can be slow. """ - # Seventyfive-move rule. - if self.is_seventyfive_moves(): - return True - - # Insufficient material. - if self.is_insufficient_material(): - return True - - # Stalemate or checkmate. - if not any(self.generate_legal_moves()): - return True - - if claim_draw: - # Claim draw, including by threefold repetition. - return self.can_claim_draw() - else: - # Fivefold repetition. - return self.is_fivefold_repetition() - - def result(self, *, claim_draw: bool = False) -> str: - """ - Gets the game result. - - ``1-0``, ``0-1`` or ``1/2-1/2`` if the - :func:`game is over `. Otherwise, the - result is undetermined: ``*``. - """ - # Chess variant support. + # Variant support. if self.is_variant_loss(): - return "0-1" if self.turn == WHITE else "1-0" - elif self.is_variant_win(): - return "1-0" if self.turn == WHITE else "0-1" - elif self.is_variant_draw(): - return "1/2-1/2" + return Outcome(GameEnd.VariantLoss, not self.turn) + if self.is_variant_win(): + return Outcome(GameEnd.VariantWin, self.turn) + if self.is_variant_draw(): + return Outcome(GameEnd.VariantDraw, None) - # Checkmate. + # Normal game end. if self.is_checkmate(): - return "0-1" if self.turn == WHITE else "1-0" - - # Draw claimed. - if claim_draw and self.can_claim_draw(): - return "1/2-1/2" - - # Seventyfive-move rule or fivefold repetition. - if self.is_seventyfive_moves() or self.is_fivefold_repetition(): - return "1/2-1/2" - - # Insufficient material. + return Outcome(GameEnd.Checkmate, not self.turn) if self.is_insufficient_material(): - return "1/2-1/2" - - # Stalemate. + return Outcome(GameEnd.InsufficientMaterial, None) if not any(self.generate_legal_moves()): - return "1/2-1/2" + return Outcome(GameEnd.Stalemate, None) + + # Automatic draws. + if self.is_seventyfive_moves(): + return Outcome(GameEnd.SeventyfiveMoves, None) + if self.is_fivefold_repetition(): + return Outcome(GameEnd.FivefoldRepetition, None) + + # Claimable draws. + if claim_draw: + if self.can_claim_fifty_moves(): + return Outcome(GameEnd.FiftyMoves, None) + if self.can_claim_threefold_repetition(): + return Outcome(GameEnd.ThreefoldRepetition, None) - # Undetermined. - return "*" + return None def is_checkmate(self) -> bool: """Checks if the current position is a checkmate.""" diff --git a/docs/core.rst b/docs/core.rst index 50d1011d1..162ab9006 100644 --- a/docs/core.rst +++ b/docs/core.rst @@ -112,6 +112,15 @@ Board .. autoclass:: chess.BaseBoard :members: +Outcome +------- + +.. autoclass:: chess.Outcome + :members: + +.. autoclass:: chess.GameEnd + :members: + Square sets ----------- From e573632d5b93544361e41f383bf9aebb66902435 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 6 Apr 2021 00:35:04 +0200 Subject: [PATCH 194/613] Add missing return type annotation for Outcome.result() --- chess/__init__.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/__init__.py b/chess/__init__.py index 5007f89f3..7fdf1982d 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -160,7 +160,7 @@ class Outcome: winner: Optional[Color] """The winning color or ``None`` if drawn.""" - def result(self): + def result(self) -> str: """Returns ``1-0``, ``0-1`` or ``1/2-1/2``.""" return "1/2-1/2" if self.winner is None else ("1-0" if self.winner else "0-1") From 0454153f8e09666924ab6c47cc8cc322248a2617 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 6 Apr 2021 00:37:59 +0200 Subject: [PATCH 195/613] GameEnd -> Termination --- chess/__init__.py | 24 ++++++++++++------------ docs/core.rst | 2 +- 2 files changed, 13 insertions(+), 13 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index 7fdf1982d..ca7446c58 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -123,7 +123,7 @@ class Status(enum.IntFlag): STATUS_IMPOSSIBLE_CHECK = Status.IMPOSSIBLE_CHECK -class GameEnd(enum.Enum): +class Termination(enum.Enum): """Reasons for a game to be over.""" Checkmate = 1 @@ -154,7 +154,7 @@ class Outcome: :func:`chess.Board.outcome()`. """ - end: GameEnd + termination: Termination """The reason for the game to have ended.""" winner: Optional[Color] @@ -1893,32 +1893,32 @@ def outcome(self, *, claim_draw: bool = False) -> Optional[Outcome]: """ # Variant support. if self.is_variant_loss(): - return Outcome(GameEnd.VariantLoss, not self.turn) + return Outcome(Termination.VariantLoss, not self.turn) if self.is_variant_win(): - return Outcome(GameEnd.VariantWin, self.turn) + return Outcome(Termination.VariantWin, self.turn) if self.is_variant_draw(): - return Outcome(GameEnd.VariantDraw, None) + return Outcome(Termination.VariantDraw, None) # Normal game end. if self.is_checkmate(): - return Outcome(GameEnd.Checkmate, not self.turn) + return Outcome(Termination.Checkmate, not self.turn) if self.is_insufficient_material(): - return Outcome(GameEnd.InsufficientMaterial, None) + return Outcome(Termination.InsufficientMaterial, None) if not any(self.generate_legal_moves()): - return Outcome(GameEnd.Stalemate, None) + return Outcome(Termination.Stalemate, None) # Automatic draws. if self.is_seventyfive_moves(): - return Outcome(GameEnd.SeventyfiveMoves, None) + return Outcome(Termination.SeventyfiveMoves, None) if self.is_fivefold_repetition(): - return Outcome(GameEnd.FivefoldRepetition, None) + return Outcome(Termination.FivefoldRepetition, None) # Claimable draws. if claim_draw: if self.can_claim_fifty_moves(): - return Outcome(GameEnd.FiftyMoves, None) + return Outcome(Termination.FiftyMoves, None) if self.can_claim_threefold_repetition(): - return Outcome(GameEnd.ThreefoldRepetition, None) + return Outcome(Termination.ThreefoldRepetition, None) return None diff --git a/docs/core.rst b/docs/core.rst index 162ab9006..ef7d3005a 100644 --- a/docs/core.rst +++ b/docs/core.rst @@ -118,7 +118,7 @@ Outcome .. autoclass:: chess.Outcome :members: -.. autoclass:: chess.GameEnd +.. autoclass:: chess.Termination :members: Square sets From 8e701104cf8cf6cb396eb3415fb7e99cc73f988b Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 6 Apr 2021 00:42:46 +0200 Subject: [PATCH 196/613] Minor doc tweaks for board.outcome() --- chess/__init__.py | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index ca7446c58..75d0da14e 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -124,7 +124,7 @@ class Status(enum.IntFlag): class Termination(enum.Enum): - """Reasons for a game to be over.""" + """Enum with reasons for a game to be over.""" Checkmate = 1 """See :func:`chess.Board.is_checkmate()`.""" @@ -1880,7 +1880,8 @@ def outcome(self, *, claim_draw: bool = False) -> Optional[Outcome]: the :func:`seventyfive-move rule `, :func:`fivefold repetition `, or a :func:`variant end condition `. - Returns the :class:`chess.Outcome` if the game has ended or ``None``. + Returns the :class:`chess.Outcome` if the game has ended, otherwise + ``None``. Alternatively, use :func:`~chess.Board.is_game_over()` if you are not interested in who won the game and why. From 0f5817296f72c20240b1beac479e70771c037963 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 6 Apr 2021 00:44:55 +0200 Subject: [PATCH 197/613] Update REAMDE.rst after GameEnd -> Termination --- README.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.rst b/README.rst index 6dc9761ad..ce8418980 100644 --- a/README.rst +++ b/README.rst @@ -131,7 +131,7 @@ Features >>> board.is_insufficient_material() False >>> board.outcome() - Outcome(end=, winner=True) + Outcome(termination=, winner=True) * Detects repetitions. Has a half-move clock. From 666749732b9f2df94d454a62481f774a8e88697c Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 6 Apr 2021 11:45:16 +0200 Subject: [PATCH 198/613] More idiomatic CommandState enum --- chess/engine.py | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index d6d4e8876..d904249a7 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1020,7 +1020,7 @@ async def communicate(self: ProtocolT, command_factory: Callable[[ProtocolT], Ba if self.returncode.done(): raise EngineTerminatedError(f"engine process dead (exit code: {self.returncode.result()})") - assert command.state == CommandState.New + assert command.state == CommandState.NEW if self.next_command is not None: self.next_command.result.cancel() @@ -1198,26 +1198,26 @@ async def popen(cls: Type[ProtocolT], command: Union[str, List[str]], *, setpgrp class CommandState(enum.Enum): - New = 1 - Active = 2 - Cancelling = 3 - Done = 4 + NEW = enum.auto() + ACTIVE = enum.auto() + CANCELLING = enum.auto() + DONE = enum.auto() class BaseCommand(Generic[ProtocolT, T]): def __init__(self, engine: ProtocolT) -> None: - self.state = CommandState.New + self.state = CommandState.NEW self.result: asyncio.Future[T] = asyncio.Future() self.finished: asyncio.Future[None] = asyncio.Future() def _engine_terminated(self, engine: ProtocolT, code: int) -> None: exc = EngineTerminatedError(f"engine process died unexpectedly (exit code: {code})") - if self.state == CommandState.Active: + if self.state == CommandState.ACTIVE: self.engine_terminated(engine, exc) - elif self.state == CommandState.Cancelling: + elif self.state == CommandState.CANCELLING: self.finished.set_result(None) - elif self.state == CommandState.New: + elif self.state == CommandState.NEW: self._handle_exception(engine, exc) def _handle_exception(self, engine: ProtocolT, exc: Exception) -> None: @@ -1235,21 +1235,21 @@ def _handle_exception(self, engine: ProtocolT, exc: Exception) -> None: self.finished.set_result(None) def set_finished(self) -> None: - assert self.state in [CommandState.Active, CommandState.Cancelling] + assert self.state in [CommandState.ACTIVE, CommandState.CANCELLING] if not self.result.done(): self.result.set_exception(EngineError(f"engine command finished before returning result: {self!r}")) self.finished.set_result(None) - self.state = CommandState.Done + self.state = CommandState.DONE def _cancel(self, engine: ProtocolT) -> None: - if self.state != CommandState.Cancelling and self.state != CommandState.Done: - assert self.state == CommandState.Active - self.state = CommandState.Cancelling + if self.state != CommandState.CANCELLING and self.state != CommandState.DONE: + assert self.state == CommandState.ACTIVE + self.state = CommandState.CANCELLING self.cancel(engine) def _start(self, engine: ProtocolT) -> None: - assert self.state == CommandState.New - self.state = CommandState.Active + assert self.state == CommandState.NEW + self.state = CommandState.ACTIVE try: self.check_initialized(engine) self.start(engine) @@ -1257,7 +1257,7 @@ def _start(self, engine: ProtocolT) -> None: self._handle_exception(engine, err) def _line_received(self, engine: ProtocolT, line: str) -> None: - assert self.state in [CommandState.Active, CommandState.Cancelling] + assert self.state in [CommandState.ACTIVE, CommandState.CANCELLING] try: self.line_received(engine, line) except EngineError as err: From b93984349393c49e0d9991eda9583df7f6fc5011 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 6 Apr 2021 11:51:34 +0200 Subject: [PATCH 199/613] More idiomatic Termination enum --- chess/__init__.py | 40 ++++++++++++++++++++-------------------- 1 file changed, 20 insertions(+), 20 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index 75d0da14e..8aeb83833 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -126,25 +126,25 @@ class Status(enum.IntFlag): class Termination(enum.Enum): """Enum with reasons for a game to be over.""" - Checkmate = 1 + CHECKMATE = enum.auto() """See :func:`chess.Board.is_checkmate()`.""" - Stalemate = 2 + STALEMATE = enum.auto() """See :func:`chess.Board.is_stalemate()`.""" - InsufficientMaterial = 3 + INSUFFICIENT_MATERIAL = enum.auto() """See :func:`chess.Board.is_insufficient_material()`.""" - SeventyfiveMoves = 4 + SEVENTYFIVE_MOVES = enum.auto() """See :func:`chess.Board.is_seventyfive_moves()`.""" - FivefoldRepetition = 5 + FIVEFOLD_REPETITION = enum.auto() """See :func:`chess.Board.is_fivefold_repetition()`.""" - FiftyMoves = 6 + FIFTY_MOVES = enum.auto() """See :func:`chess.Board.can_claim_fifty_moves()`.""" - ThreefoldRepetition = 7 + THREEFOLD_REPETITION = enum.auto() """See :func:`chess.Board.can_claim_threefold_repetition()`.""" - VariantWin = 8 + VARIANT_WIN = enum.auto() """See :func:`chess.Board.is_variant_win()`.""" - VariantLoss = 9 + VARIANT_LOSS = enum.auto() """See :func:`chess.Board.is_variant_loss()`.""" - VariantDraw = 10 + VARIANT_DRAW = enum.auto() """See :func:`chess.Board.is_variant_draw()`.""" @dataclasses.dataclass @@ -1894,32 +1894,32 @@ def outcome(self, *, claim_draw: bool = False) -> Optional[Outcome]: """ # Variant support. if self.is_variant_loss(): - return Outcome(Termination.VariantLoss, not self.turn) + return Outcome(Termination.VARIANT_LOSS, not self.turn) if self.is_variant_win(): - return Outcome(Termination.VariantWin, self.turn) + return Outcome(Termination.VARIANT_WIN, self.turn) if self.is_variant_draw(): - return Outcome(Termination.VariantDraw, None) + return Outcome(Termination.VARIANT_DRAW, None) # Normal game end. if self.is_checkmate(): - return Outcome(Termination.Checkmate, not self.turn) + return Outcome(Termination.CHECKMATE, not self.turn) if self.is_insufficient_material(): - return Outcome(Termination.InsufficientMaterial, None) + return Outcome(Termination.INSUFFICIENT_MATERIAL, None) if not any(self.generate_legal_moves()): - return Outcome(Termination.Stalemate, None) + return Outcome(Termination.STALEMATE, None) # Automatic draws. if self.is_seventyfive_moves(): - return Outcome(Termination.SeventyfiveMoves, None) + return Outcome(Termination.SEVENTYFIVE_MOVES, None) if self.is_fivefold_repetition(): - return Outcome(Termination.FivefoldRepetition, None) + return Outcome(Termination.FIVEFOLD_REPETITION, None) # Claimable draws. if claim_draw: if self.can_claim_fifty_moves(): - return Outcome(Termination.FiftyMoves, None) + return Outcome(Termination.FIFTY_MOVES, None) if self.can_claim_threefold_repetition(): - return Outcome(Termination.ThreefoldRepetition, None) + return Outcome(Termination.THREEFOLD_REPETITION, None) return None From fb513c595522c4a658aeba4cc4a006cfa2d2c410 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 6 Apr 2021 11:54:11 +0200 Subject: [PATCH 200/613] Update README after Termination enum tweak --- README.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.rst b/README.rst index ce8418980..0e2c59363 100644 --- a/README.rst +++ b/README.rst @@ -131,7 +131,7 @@ Features >>> board.is_insufficient_material() False >>> board.outcome() - Outcome(termination=, winner=True) + Outcome(termination=, winner=True) * Detects repetitions. Has a half-move clock. From 465d15ef883f24e3c114b444a32c75a02290243f Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 6 Apr 2021 12:12:39 +0200 Subject: [PATCH 201/613] Prepare changelog --- CHANGELOG.rst | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 24d945021..ab1962ee9 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,6 +1,33 @@ Changelog for python-chess ========================== +Upcoming in the next release +---------------------------- + +Bugfixes: + +* Fixed typing of ``chess.pgn.Mainline.__reversed__()``. It is now a generator, + and ``chess.pgn.ReverseMainline`` has been **removed**. + This is a breaking change but a required bugfix. +* Implement **ponderhit** for consecutive pondering calls to + ``chess.engine.Protocol.play(..., ponder=True)``. Previously, the pondering + search was always stopped and restarted. +* Provide the full move stack, not just the position, for UCI pondering. +* Fixed XBoard level in sudden death games. +* Ignore trailing space after ponder move sent by UCI engine. + Previously, such a move would be rejected. +* Prevent cancelling engine commands after they have already been cancelled or + completed. Some internals (``chess.engine.BaseCommand``) have been changed to + accomplish this. + +New features: + +* Added ``chess.Board.outcome()``. +* Implement and accept usermove festure for XBoard engines. + +Special thanks to @MarkZH for many of the engine related changes in this +release! + New in v1.4.0 ------------- From d2ba61c80326eadab728ceaf9bb2dd0c8d5f800d Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Tue, 6 Apr 2021 20:09:25 -0700 Subject: [PATCH 202/613] Spelling correction --- CHANGELOG.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index ab1962ee9..dfe66d2e5 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -23,7 +23,7 @@ Bugfixes: New features: * Added ``chess.Board.outcome()``. -* Implement and accept usermove festure for XBoard engines. +* Implement and accept usermove feature for XBoard engines. Special thanks to @MarkZH for many of the engine related changes in this release! From abd0fc4d0b07dbb86009e0a089e796f918ae732b Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 7 Apr 2021 10:42:27 +0200 Subject: [PATCH 203/613] Prepare 1.5.0 --- CHANGELOG.rst | 6 +++--- chess/__init__.py | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index dfe66d2e5..5eb6fac96 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,15 +1,15 @@ Changelog for python-chess ========================== -Upcoming in the next release ----------------------------- +New in v1.5.0 +------------- Bugfixes: * Fixed typing of ``chess.pgn.Mainline.__reversed__()``. It is now a generator, and ``chess.pgn.ReverseMainline`` has been **removed**. This is a breaking change but a required bugfix. -* Implement **ponderhit** for consecutive pondering calls to +* Implement UCI **ponderhit** for consecutive calls to ``chess.engine.Protocol.play(..., ponder=True)``. Previously, the pondering search was always stopped and restarted. * Provide the full move stack, not just the position, for UCI pondering. diff --git a/chess/__init__.py b/chess/__init__.py index 8aeb83833..ac4d48ff1 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -27,7 +27,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.4.0" +__version__ = "1.5.0" import collections import copy From 31d57f7f0ac24a9b2f92017678f9394d87f9ca4e Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 10 Apr 2021 09:02:35 +0200 Subject: [PATCH 204/613] Better error message for #767 --- chess/__init__.py | 2 ++ 1 file changed, 2 insertions(+) diff --git a/chess/__init__.py b/chess/__init__.py index ac4d48ff1..793d1aed1 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -661,6 +661,8 @@ def pieces_mask(self, piece_type: PieceType, color: Color) -> Bitboard: bb = self.queens elif piece_type == KING: bb = self.kings + else: + assert False, f"expected PieceType, got {piece_type!r}" return bb & self.occupied_co[color] From 6cf47a83d67711b89b251a78e7c3d6c326357b21 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 17 Apr 2021 20:01:02 +0200 Subject: [PATCH 205/613] Link https://healeycodes.com/building-my-own-chess-engine/ --- README.rst | 1 + 1 file changed, 1 insertion(+) diff --git a/README.rst b/README.rst index 0e2c59363..f02d0e584 100644 --- a/README.rst +++ b/README.rst @@ -336,6 +336,7 @@ If you like, share interesting things you are using python-chess for, for exampl * a bridge between Lichess API and chess engines – https://github.com/careless25/lichess-bot * a command-line PGN annotator – https://github.com/rpdelaney/python-chess-annotator * an HTTP microservice to render board images – https://github.com/niklasf/web-boardimage +* building a toy chess engine with alpha-beta pruning, piece-square tables, and move ordering – https://healeycodes.com/building-my-own-chess-engine/ * a JIT compiled chess engine – https://github.com/SamRagusa/Batch-First * teaching Cognitive Science – `https://jupyter.brynmawr.edu `_ * an `Alexa skill to play blindfold chess `_ – https://github.com/laynr/blindfold-chess From 0bac87950dfb48a161d99224bd8ed3de4a3d4cff Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sun, 25 Apr 2021 17:46:56 +0200 Subject: [PATCH 206/613] Try GitHub sponsors --- .github/FUNDING.yml | 1 + 1 file changed, 1 insertion(+) create mode 100644 .github/FUNDING.yml diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml new file mode 100644 index 000000000..7e1e93611 --- /dev/null +++ b/.github/FUNDING.yml @@ -0,0 +1 @@ +github: niklasf From a02b7d7719b4c288cadc76c51b83c449bdeaa531 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 29 Apr 2021 12:33:08 +0200 Subject: [PATCH 207/613] Make setpgrp more amicable --- chess/engine.py | 8 +++----- test.py | 6 +++--- 2 files changed, 6 insertions(+), 8 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index d904249a7..729272ce7 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1180,19 +1180,17 @@ async def quit(self) -> None: """Asks the engine to shut down.""" @classmethod - async def popen(cls: Type[ProtocolT], command: Union[str, List[str]], *, setpgrp: bool = False, **kwargs: Any) -> Tuple[asyncio.SubprocessTransport, ProtocolT]: + async def popen(cls: Type[ProtocolT], command: Union[str, List[str]], *, setpgrp: bool = False, **popen_args: Any) -> Tuple[asyncio.SubprocessTransport, ProtocolT]: if not isinstance(command, list): command = [command] - popen_args = {} if setpgrp: try: # Windows. - popen_args["creationflags"] = subprocess.CREATE_NEW_PROCESS_GROUP # type: ignore + popen_args["creationflags"] = popen_args.get("creationflags", 0) | subprocess.CREATE_NEW_PROCESS_GROUP # type: ignore except AttributeError: # Unix. - popen_args["preexec_fn"] = os.setpgrp - popen_args.update(kwargs) + popen_args["start_new_session"] = True return await asyncio.get_running_loop().subprocess_exec(cls, *command, **popen_args) # type: ignore diff --git a/test.py b/test.py index 383e5101c..d46317158 100755 --- a/test.py +++ b/test.py @@ -2893,7 +2893,7 @@ def test_sf_options(self): @catchAndSkip(FileNotFoundError, "need stockfish") def test_sf_analysis(self): - with chess.engine.SimpleEngine.popen_uci("stockfish", debug=True) as engine: + with chess.engine.SimpleEngine.popen_uci("stockfish", setpgrp=True, debug=True) as engine: board = chess.Board("8/6K1/1p1B1RB1/8/2Q5/2n1kP1N/3b4/4n3 w - - 0 1") limit = chess.engine.Limit(depth=26) analysis = engine.analysis(board, limit) @@ -2932,7 +2932,7 @@ def test_sf_multipv(self): @catchAndSkip(FileNotFoundError, "need stockfish") def test_sf_quit(self): - engine = chess.engine.SimpleEngine.popen_uci("stockfish", debug=True) + engine = chess.engine.SimpleEngine.popen_uci("stockfish", setpgrp=True, debug=True) with engine: engine.quit() @@ -2945,7 +2945,7 @@ def test_crafty_play_to_mate(self): logging.disable(logging.WARNING) try: with tempfile.TemporaryDirectory(prefix="crafty") as tmpdir: - with chess.engine.SimpleEngine.popen_xboard("crafty", debug=True, cwd=tmpdir) as engine: + with chess.engine.SimpleEngine.popen_xboard("crafty", setpgrp=True, debug=True, cwd=tmpdir) as engine: board = chess.Board("2bqkbn1/2pppp2/np2N3/r3P1p1/p2N2B1/5Q2/PPPPKPP1/RNB2r2 w KQkq - 0 1") limit = chess.engine.Limit(depth=10) while not board.is_game_over() and len(board.move_stack) < 5: From bbbaac9f046723d922a4f81c58bd2033c64ba3f7 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 29 Apr 2021 21:16:04 +0200 Subject: [PATCH 208/613] Link UCI/XBoard specs --- docs/engine.rst | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/docs/engine.rst b/docs/engine.rst index 7637c116e..2a8a2a4c7 100644 --- a/docs/engine.rst +++ b/docs/engine.rst @@ -1,7 +1,9 @@ UCI/XBoard engine communication =============================== -UCI and XBoard are protocols for communicating with chess engines. This module +The `Universal chess interface (UCI) `_ +and `XBoard protocol `_ +are standards for communicating with chess engines. This module implements an abstraction for playing moves and analysing positions with both kinds of engines. From e28da7a76b5b33746107e820621be5cad894a36d Mon Sep 17 00:00:00 2001 From: stevepapazis Date: Mon, 3 May 2021 12:03:30 +0300 Subject: [PATCH 209/613] Implementation of HordeBoard.has_insufficient_material --- chess/variant.py | 201 ++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 199 insertions(+), 2 deletions(-) diff --git a/chess/variant.py b/chess/variant.py index 23de858e8..0b31b55ee 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -457,9 +457,206 @@ def is_variant_win(self) -> bool: return bool(self.occupied) and not self.occupied_co[not self.turn] def has_insufficient_material(self, color: chess.Color) -> bool: - # TODO: Could detect some cases where the Horde can no longer mate. - return False + # The side with the king can always win by capturing the horde. + if color == chess.BLACK: + return False + + white = self.occupied_co[chess.WHITE] + queens = chess.popcount( white & self.queens ) + pawns = chess.popcount( white & self.pawns ) + rooks = chess.popcount( white & self.rooks ) + bishops = chess.popcount( white & self.bishops ) + knights = chess.popcount( white & self.knights ) + horde_darkb = chess.popcount(chess.BB_DARK_SQUARES & white & self.bishops) + horde_lightb = chess.popcount(chess.BB_LIGHT_SQUARES & white & self.bishops) + horde_bishop_co = lambda : chess.WHITE if horde_lightb >= 1 else chess.BLACK + horde_num = ( + pawns + knights + rooks + queens + + (horde_darkb if horde_darkb <= 2 else 2) + + (horde_lightb if horde_lightb <= 2 else 2) + ) + # Two same color bishops suffice to cover all the light and dark squares around the enemy king. + + pieces = self.occupied_co[chess.BLACK] + pieces_pawns = chess.popcount( pieces & self.pawns ) + pieces_bishops = chess.popcount( pieces & self.bishops ) + pieces_knights = chess.popcount( pieces & self.knights ) + pieces_rooks = chess.popcount( pieces & self.rooks ) + pieces_queens = chess.popcount( pieces & self.queens ) + pieces_darkb = lambda : chess.popcount(chess.BB_DARK_SQUARES & pieces & self.bishops) + pieces_lightb = lambda : chess.popcount(chess.BB_LIGHT_SQUARES & pieces & self.bishops) + pieces_num = chess.popcount(pieces) + pieces_oppositeb_of = lambda square_color: pieces_darkb() if square_color == chess.WHITE else pieces_lightb() + pieces_sameb_as = lambda square_color: pieces_lightb() if square_color == chess.WHITE else pieces_darkb() + pieces_of_type_not = lambda piece: pieces_num - piece + has_bishop_pair = lambda side: (horde_lightb >= 1 and horde_darkb >= 1) if side == chess.WHITE else (pieces_lightb() >= 1 and pieces_darkb() >= 1) + + if horde_num == 0: + return True + if horde_num >= 4: + # Four or more white pieces can always deliver mate. + return False + + if (pawns >= 1 or queens >= 1) and horde_num >= 2: + # Pawns/queens are never insufficient material when paired with any other + # piece (a pawn promotes to a queen and delivers mate). + return False + + if rooks >= 1 and horde_num >= 2: + # A rook is insufficient material only when it is paired with a bishop + # against a lone king. The horde can mate in any other case. + # A rook on A1 and a bishop on C3 mate a king on B1 when there is a + # friendly pawn/opposite-color-bishop/rook/queen on C2. + # A rook on B8 and a bishop C3 mate a king on A1 when there is a friendly + # knight on A2. + if not (horde_num == 2 and rooks == 1 and bishops == 1 and pieces_of_type_not(pieces_sameb_as(horde_bishop_co())) == 1): + return False + + if horde_num == 1: + if pieces_num == 1: + # A lone piece cannot mate a lone king. + return True + elif queens == 1: + # The horde has a lone queen. + # A lone queen mates a king on A1 bounded by: + # -- a pawn/rook on A2 + # -- two same color bishops on A2, B1 + # We ignore every other mating case, since it can be reduced to + # the two previous cases (e.g. a black pawn on A2 and a black + # bishop on B1). + return not ( + pieces_pawns >= 1 or + pieces_rooks >= 1 or + pieces_lightb() >= 2 or + pieces_darkb() >= 2 + ) + elif pawns == 1: + # Promote the pawn to a queen or a knight and check whether white + # can mate. + pawn_square = chess.SquareSet(self.pawns & white).pop() + promote_to_queen = HordeBoard(self.fen()) + promote_to_queen.set_piece_at( pawn_square, chess.Piece(chess.QUEEN,chess.WHITE) ) + promote_to_knight = HordeBoard(self.fen()) + promote_to_knight.set_piece_at( pawn_square, chess.Piece(chess.KNIGHT,chess.WHITE) ) + return promote_to_queen.has_insufficient_material(chess.WHITE) and promote_to_knight.has_insufficient_material(chess.WHITE) + elif rooks == 1: + # A lone rook mates a king on A8 bounded by a pawn/rook on A7 and a + # pawn/knight on B7. We ignore every other case, since it can be + # reduced to the two previous cases. + # (e.g. three pawns on A7, B7, C7) + return not ( + pieces_pawns >= 2 or + (pieces_rooks >= 1 and pieces_pawns >= 1) or + (pieces_rooks >= 1 and pieces_knights >= 1) or + (pieces_pawns >= 1 and pieces_knights >= 1) + ) + elif bishops == 1: + # The horde has a lone bishop. + return not ( + # The king can be mated on A1 if there is a pawn/opposite-color-bishop + # on A2 and an opposite-color-bishop on B1. + # If black has two or more pawns, white gets the benefit of the doubt; + # there is an outside chance that white promotes its pawns to + # opposite-color-bishops and selfmates theirself. + # Every other case that the king is mated by the bishop requires that + # black has two pawns or two opposite-color-bishop or a pawn and an + # opposite-color-bishop. + # For example a king on A3 can be mated if there is + # a pawn/opposite-color-bishop on A4, a pawn/opposite-color-bishop on + # B3, a pawn/bishop/rook/queen on A2 and any other piece on B2. + pieces_oppositeb_of(horde_bishop_co()) >= 2 or + (pieces_oppositeb_of(horde_bishop_co()) >= 1 and pieces_pawns >= 1) or + pieces_pawns >= 2 + ) + elif knights == 1: + # The horde has a lone knight. + return not ( + # The king on A1 can be smother mated by a knight on C2 if there is + # a pawn/knight/bishop on B2, a knight/rook on B1 and any other piece + # on A2. + # Moreover, when black has four or more pieces and two of them are + # pawns, black can promote their pawns and selfmate theirself. + pieces_num >= 4 and ( + pieces_knights>=2 or pieces_pawns>=2 or + (pieces_rooks>=1 and pieces_knights>=1) or + (pieces_rooks>=1 and pieces_bishops>=1) or + (pieces_knights>=1 and pieces_bishops>=1) or + (pieces_rooks>=1 and pieces_pawns>=1) or + (pieces_knights>=1 and pieces_pawns>=1) or + (pieces_bishops>=1 and pieces_pawns>=1) or + (has_bishop_pair(chess.BLACK) and pieces_pawns>=1) + ) and ( pieces_of_type_not(pieces_darkb())>=3 if pieces_darkb()>=2 else True ) + and ( pieces_of_type_not(pieces_lightb())>=3 if pieces_lightb()>=2 else True ) + ) + + # By this point, we only need to deal with white's minor pieces. + + elif horde_num == 2: + + if pieces_num == 1: + # Two minor pieces cannot mate a lone king. + return True + elif knights == 2: + # A king on A1 is mated by two knights, if it is obstructed by a + # pawn/bishop/knight on B2. On the other hand, if black only has + # major pieces it is a draw. + return not (pieces_pawns + pieces_bishops + pieces_knights >= 1) + elif has_bishop_pair(chess.WHITE): + return not ( + # A king on A1 obstructed by a pawn/bishop on A2 is mated + # by the bishop pair. + pieces_pawns >= 1 or pieces_bishops >= 1 or + # A pawn/bishop/knight on B4, a pawn/bishop/rook/queen on + # A4 and the king on A3 enable Boden's mate by the bishop + # pair. In every other case white cannot win. + ( pieces_knights >= 1 and pieces_rooks + pieces_queens >= 1 ) + ) + elif bishops >= 1 and knights >= 1: + # The horde has a bishop and a knight. + return not ( + # A king on A1 obstructed by a pawn/opposite-color-bishop on + # A2 is mated by a knight on D2 and a bishop on C3. + pieces_pawns >= 1 or pieces_oppositeb_of(horde_bishop_co()) >= 1 or + # A king on A1 bounded by two friendly pieces on A2 and B1 is + # mated when the knight moves from D4 to C2 so that both the + # knight and the bishop deliver check. + pieces_of_type_not( pieces_sameb_as(horde_bishop_co()) ) >=3 + ) + else: + # The horde has two or more bishops on the same color. + # White can only win if black has enough material to obstruct + # the squares of the opposite color around the king. + return not ( + # A king on A1 obstructed by a pawn/opposite-bishop/knight + # on A2 and a opposite-bishop/knight on B1 is mated by two + # bishops on B2 and C3. This position is theoretically + # achievable even when black has two pawns or when they + # have a pawn and an opposite color bishop. + ( pieces_pawns >= 1 and pieces_oppositeb_of(horde_bishop_co()) >= 1 ) or + ( pieces_pawns >= 1 and pieces_knights >= 1 ) or + ( pieces_oppositeb_of(horde_bishop_co()) >= 1 and pieces_knights >= 1 ) or + ( pieces_oppositeb_of(horde_bishop_co()) >= 2 ) or + pieces_knights >= 2 or + pieces_pawns >= 2 + # In every other case, white can only draw. + ) + + elif horde_num == 3: + # A king in the corner is mated by two knights and a bishop or three + # knights or the bishop pair and a knight/bishop. + if (knights == 2 and bishops == 1) or knights == 3 or has_bishop_pair(chess.WHITE): + return False + else: + # White has two same color bishops and a knight. + # A king on A1 is mated by a bishop on B2, a bishop on C1 and a + # knight on C3, as long as there is another black piece to waste + # a tempo. + return pieces_num == 1 + + return True + + def status(self) -> chess.Status: status = super().status() status &= ~chess.STATUS_NO_WHITE_KING From d9f77610c52cd4afc28506ffeaec79c63384274d Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 11 May 2021 11:52:39 +0200 Subject: [PATCH 210/613] Match coding style --- chess/variant.py | 205 ++++++++++++++++++++++++----------------------- 1 file changed, 105 insertions(+), 100 deletions(-) diff --git a/chess/variant.py b/chess/variant.py index 0b31b55ee..658d7f105 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -457,35 +457,40 @@ def is_variant_win(self) -> bool: return bool(self.occupied) and not self.occupied_co[not self.turn] def has_insufficient_material(self, color: chess.Color) -> bool: - # The side with the king can always win by capturing the horde. + # The side with the king can always win by capturing the Horde. if color == chess.BLACK: return False + # See https://github.com/stevepapazis/horde-insufficient-material-tests + # for how the following has been derived. + white = self.occupied_co[chess.WHITE] - queens = chess.popcount( white & self.queens ) - pawns = chess.popcount( white & self.pawns ) - rooks = chess.popcount( white & self.rooks ) - bishops = chess.popcount( white & self.bishops ) - knights = chess.popcount( white & self.knights ) + queens = chess.popcount(white & self.queens) + pawns = chess.popcount(white & self.pawns) + rooks = chess.popcount(white & self.rooks) + bishops = chess.popcount(white & self.bishops) + knights = chess.popcount(white & self.knights) + + # Two same color bishops suffice to cover all the light and dark + # squares around the enemy king. horde_darkb = chess.popcount(chess.BB_DARK_SQUARES & white & self.bishops) horde_lightb = chess.popcount(chess.BB_LIGHT_SQUARES & white & self.bishops) - horde_bishop_co = lambda : chess.WHITE if horde_lightb >= 1 else chess.BLACK + horde_bishop_co = lambda: chess.WHITE if horde_lightb >= 1 else chess.BLACK horde_num = ( pawns + knights + rooks + queens + (horde_darkb if horde_darkb <= 2 else 2) + (horde_lightb if horde_lightb <= 2 else 2) - ) - # Two same color bishops suffice to cover all the light and dark squares around the enemy king. + ) pieces = self.occupied_co[chess.BLACK] - pieces_pawns = chess.popcount( pieces & self.pawns ) - pieces_bishops = chess.popcount( pieces & self.bishops ) - pieces_knights = chess.popcount( pieces & self.knights ) - pieces_rooks = chess.popcount( pieces & self.rooks ) - pieces_queens = chess.popcount( pieces & self.queens ) - pieces_darkb = lambda : chess.popcount(chess.BB_DARK_SQUARES & pieces & self.bishops) - pieces_lightb = lambda : chess.popcount(chess.BB_LIGHT_SQUARES & pieces & self.bishops) - pieces_num = chess.popcount(pieces) + pieces_pawns = chess.popcount(pieces & self.pawns) + pieces_bishops = chess.popcount(pieces & self.bishops) + pieces_knights = chess.popcount(pieces & self.knights) + pieces_rooks = chess.popcount(pieces & self.rooks) + pieces_queens = chess.popcount(pieces & self.queens) + pieces_darkb = lambda: chess.popcount(chess.BB_DARK_SQUARES & pieces & self.bishops) + pieces_lightb = lambda: chess.popcount(chess.BB_LIGHT_SQUARES & pieces & self.bishops) + pieces_num = chess.popcount(pieces) pieces_oppositeb_of = lambda square_color: pieces_darkb() if square_color == chess.WHITE else pieces_lightb() pieces_sameb_as = lambda square_color: pieces_lightb() if square_color == chess.WHITE else pieces_darkb() pieces_of_type_not = lambda piece: pieces_num - piece @@ -494,16 +499,16 @@ def has_insufficient_material(self, color: chess.Color) -> bool: if horde_num == 0: return True - if horde_num >= 4: + if horde_num >= 4: # Four or more white pieces can always deliver mate. return False - + if (pawns >= 1 or queens >= 1) and horde_num >= 2: # Pawns/queens are never insufficient material when paired with any other # piece (a pawn promotes to a queen and delivers mate). return False - - if rooks >= 1 and horde_num >= 2: + + if rooks >= 1 and horde_num >= 2: # A rook is insufficient material only when it is paired with a bishop # against a lone king. The horde can mate in any other case. # A rook on A1 and a bishop on C3 mate a king on B1 when there is a @@ -520,25 +525,25 @@ def has_insufficient_material(self, color: chess.Color) -> bool: elif queens == 1: # The horde has a lone queen. # A lone queen mates a king on A1 bounded by: - # -- a pawn/rook on A2 - # -- two same color bishops on A2, B1 + # - a pawn/rook on A2 + # - two same color bishops on A2, B1 # We ignore every other mating case, since it can be reduced to # the two previous cases (e.g. a black pawn on A2 and a black # bishop on B1). return not ( - pieces_pawns >= 1 or - pieces_rooks >= 1 or - pieces_lightb() >= 2 or - pieces_darkb() >= 2 - ) + pieces_pawns >= 1 or + pieces_rooks >= 1 or + pieces_lightb() >= 2 or + pieces_darkb() >= 2 + ) elif pawns == 1: - # Promote the pawn to a queen or a knight and check whether white - # can mate. + # Promote the pawn to a queen or a knight and check whether + # white can mate. pawn_square = chess.SquareSet(self.pawns & white).pop() promote_to_queen = HordeBoard(self.fen()) - promote_to_queen.set_piece_at( pawn_square, chess.Piece(chess.QUEEN,chess.WHITE) ) + promote_to_queen.set_piece_at(pawn_square, chess.Piece(chess.QUEEN, chess.WHITE)) promote_to_knight = HordeBoard(self.fen()) - promote_to_knight.set_piece_at( pawn_square, chess.Piece(chess.KNIGHT,chess.WHITE) ) + promote_to_knight.set_piece_at(pawn_square, chess.Piece(chess.KNIGHT, chess.WHITE)) return promote_to_queen.has_insufficient_material(chess.WHITE) and promote_to_knight.has_insufficient_material(chess.WHITE) elif rooks == 1: # A lone rook mates a king on A8 bounded by a pawn/rook on A7 and a @@ -550,51 +555,52 @@ def has_insufficient_material(self, color: chess.Color) -> bool: (pieces_rooks >= 1 and pieces_pawns >= 1) or (pieces_rooks >= 1 and pieces_knights >= 1) or (pieces_pawns >= 1 and pieces_knights >= 1) - ) + ) elif bishops == 1: # The horde has a lone bishop. return not ( - # The king can be mated on A1 if there is a pawn/opposite-color-bishop - # on A2 and an opposite-color-bishop on B1. - # If black has two or more pawns, white gets the benefit of the doubt; - # there is an outside chance that white promotes its pawns to - # opposite-color-bishops and selfmates theirself. - # Every other case that the king is mated by the bishop requires that - # black has two pawns or two opposite-color-bishop or a pawn and an - # opposite-color-bishop. - # For example a king on A3 can be mated if there is - # a pawn/opposite-color-bishop on A4, a pawn/opposite-color-bishop on - # B3, a pawn/bishop/rook/queen on A2 and any other piece on B2. - pieces_oppositeb_of(horde_bishop_co()) >= 2 or - (pieces_oppositeb_of(horde_bishop_co()) >= 1 and pieces_pawns >= 1) or - pieces_pawns >= 2 - ) + # The king can be mated on A1 if there is a pawn/opposite-color-bishop + # on A2 and an opposite-color-bishop on B1. + # If black has two or more pawns, white gets the benefit of the doubt; + # there is an outside chance that white promotes its pawns to + # opposite-color-bishops and selfmates theirself. + # Every other case that the king is mated by the bishop requires that + # black has two pawns or two opposite-color-bishop or a pawn and an + # opposite-color-bishop. + # For example a king on A3 can be mated if there is + # a pawn/opposite-color-bishop on A4, a pawn/opposite-color-bishop on + # B3, a pawn/bishop/rook/queen on A2 and any other piece on B2. + pieces_oppositeb_of(horde_bishop_co()) >= 2 or + (pieces_oppositeb_of(horde_bishop_co()) >= 1 and pieces_pawns >= 1) or + pieces_pawns >= 2 + ) elif knights == 1: # The horde has a lone knight. return not ( - # The king on A1 can be smother mated by a knight on C2 if there is - # a pawn/knight/bishop on B2, a knight/rook on B1 and any other piece - # on A2. - # Moreover, when black has four or more pieces and two of them are - # pawns, black can promote their pawns and selfmate theirself. - pieces_num >= 4 and ( - pieces_knights>=2 or pieces_pawns>=2 or - (pieces_rooks>=1 and pieces_knights>=1) or - (pieces_rooks>=1 and pieces_bishops>=1) or - (pieces_knights>=1 and pieces_bishops>=1) or - (pieces_rooks>=1 and pieces_pawns>=1) or - (pieces_knights>=1 and pieces_pawns>=1) or - (pieces_bishops>=1 and pieces_pawns>=1) or - (has_bishop_pair(chess.BLACK) and pieces_pawns>=1) - ) and ( pieces_of_type_not(pieces_darkb())>=3 if pieces_darkb()>=2 else True ) - and ( pieces_of_type_not(pieces_lightb())>=3 if pieces_lightb()>=2 else True ) - ) - + # The king on A1 can be smother mated by a knight on C2 if there is + # a pawn/knight/bishop on B2, a knight/rook on B1 and any other piece + # on A2. + # Moreover, when black has four or more pieces and two of them are + # pawns, black can promote their pawns and selfmate theirself. + pieces_num >= 4 and ( + pieces_knights >= 2 or pieces_pawns >= 2 or + (pieces_rooks >= 1 and pieces_knights >= 1) or + (pieces_rooks >= 1 and pieces_bishops >= 1) or + (pieces_knights >= 1 and pieces_bishops >= 1) or + (pieces_rooks >= 1 and pieces_pawns >= 1) or + (pieces_knights >= 1 and pieces_pawns >= 1) or + (pieces_bishops >= 1 and pieces_pawns >= 1) or + (has_bishop_pair(chess.BLACK) and pieces_pawns >= 1) + ) and + (pieces_of_type_not(pieces_darkb()) >= 3 if pieces_darkb() >= 2 else True) and + (pieces_of_type_not(pieces_lightb()) >= 3 if pieces_lightb() >= 2 else True) + ) + # By this point, we only need to deal with white's minor pieces. elif horde_num == 2: - if pieces_num == 1: + if pieces_num == 1: # Two minor pieces cannot mate a lone king. return True elif knights == 2: @@ -602,45 +608,45 @@ def has_insufficient_material(self, color: chess.Color) -> bool: # pawn/bishop/knight on B2. On the other hand, if black only has # major pieces it is a draw. return not (pieces_pawns + pieces_bishops + pieces_knights >= 1) - elif has_bishop_pair(chess.WHITE): + elif has_bishop_pair(chess.WHITE): return not ( - # A king on A1 obstructed by a pawn/bishop on A2 is mated - # by the bishop pair. - pieces_pawns >= 1 or pieces_bishops >= 1 or - # A pawn/bishop/knight on B4, a pawn/bishop/rook/queen on - # A4 and the king on A3 enable Boden's mate by the bishop - # pair. In every other case white cannot win. - ( pieces_knights >= 1 and pieces_rooks + pieces_queens >= 1 ) - ) - elif bishops >= 1 and knights >= 1: + # A king on A1 obstructed by a pawn/bishop on A2 is mated + # by the bishop pair. + pieces_pawns >= 1 or pieces_bishops >= 1 or + # A pawn/bishop/knight on B4, a pawn/bishop/rook/queen on + # A4 and the king on A3 enable Boden's mate by the bishop + # pair. In every other case white cannot win. + (pieces_knights >= 1 and pieces_rooks + pieces_queens >= 1) + ) + elif bishops >= 1 and knights >= 1: # The horde has a bishop and a knight. return not ( - # A king on A1 obstructed by a pawn/opposite-color-bishop on - # A2 is mated by a knight on D2 and a bishop on C3. - pieces_pawns >= 1 or pieces_oppositeb_of(horde_bishop_co()) >= 1 or - # A king on A1 bounded by two friendly pieces on A2 and B1 is - # mated when the knight moves from D4 to C2 so that both the - # knight and the bishop deliver check. - pieces_of_type_not( pieces_sameb_as(horde_bishop_co()) ) >=3 - ) + # A king on A1 obstructed by a pawn/opposite-color-bishop on + # A2 is mated by a knight on D2 and a bishop on C3. + pieces_pawns >= 1 or pieces_oppositeb_of(horde_bishop_co()) >= 1 or + # A king on A1 bounded by two friendly pieces on A2 and B1 is + # mated when the knight moves from D4 to C2 so that both the + # knight and the bishop deliver check. + pieces_of_type_not(pieces_sameb_as(horde_bishop_co())) >= 3 + ) else: # The horde has two or more bishops on the same color. # White can only win if black has enough material to obstruct # the squares of the opposite color around the king. return not ( - # A king on A1 obstructed by a pawn/opposite-bishop/knight - # on A2 and a opposite-bishop/knight on B1 is mated by two - # bishops on B2 and C3. This position is theoretically - # achievable even when black has two pawns or when they - # have a pawn and an opposite color bishop. - ( pieces_pawns >= 1 and pieces_oppositeb_of(horde_bishop_co()) >= 1 ) or - ( pieces_pawns >= 1 and pieces_knights >= 1 ) or - ( pieces_oppositeb_of(horde_bishop_co()) >= 1 and pieces_knights >= 1 ) or - ( pieces_oppositeb_of(horde_bishop_co()) >= 2 ) or - pieces_knights >= 2 or - pieces_pawns >= 2 - # In every other case, white can only draw. - ) + # A king on A1 obstructed by a pawn/opposite-bishop/knight + # on A2 and a opposite-bishop/knight on B1 is mated by two + # bishops on B2 and C3. This position is theoretically + # achievable even when black has two pawns or when they + # have a pawn and an opposite color bishop. + (pieces_pawns >= 1 and pieces_oppositeb_of(horde_bishop_co()) >= 1) or + (pieces_pawns >= 1 and pieces_knights >= 1) or + (pieces_oppositeb_of(horde_bishop_co()) >= 1 and pieces_knights >= 1) or + (pieces_oppositeb_of(horde_bishop_co()) >= 2) or + pieces_knights >= 2 or + pieces_pawns >= 2 + # In every other case, white can only draw. + ) elif horde_num == 3: # A king in the corner is mated by two knights and a bishop or three @@ -655,8 +661,7 @@ def has_insufficient_material(self, color: chess.Color) -> bool: return pieces_num == 1 return True - - + def status(self) -> chess.Status: status = super().status() status &= ~chess.STATUS_NO_WHITE_KING From 50bde0266c3ce0e5a3d75511e35298235a449ae1 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 11 May 2021 11:55:34 +0200 Subject: [PATCH 211/613] Eagerly compute 0-arity lambdas --- chess/variant.py | 36 ++++++++++++++++++------------------ 1 file changed, 18 insertions(+), 18 deletions(-) diff --git a/chess/variant.py b/chess/variant.py index 658d7f105..5d7608030 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -475,7 +475,7 @@ def has_insufficient_material(self, color: chess.Color) -> bool: # squares around the enemy king. horde_darkb = chess.popcount(chess.BB_DARK_SQUARES & white & self.bishops) horde_lightb = chess.popcount(chess.BB_LIGHT_SQUARES & white & self.bishops) - horde_bishop_co = lambda: chess.WHITE if horde_lightb >= 1 else chess.BLACK + horde_bishop_co = chess.WHITE if horde_lightb >= 1 else chess.BLACK horde_num = ( pawns + knights + rooks + queens + (horde_darkb if horde_darkb <= 2 else 2) + @@ -488,13 +488,13 @@ def has_insufficient_material(self, color: chess.Color) -> bool: pieces_knights = chess.popcount(pieces & self.knights) pieces_rooks = chess.popcount(pieces & self.rooks) pieces_queens = chess.popcount(pieces & self.queens) - pieces_darkb = lambda: chess.popcount(chess.BB_DARK_SQUARES & pieces & self.bishops) - pieces_lightb = lambda: chess.popcount(chess.BB_LIGHT_SQUARES & pieces & self.bishops) + pieces_darkb = chess.popcount(chess.BB_DARK_SQUARES & pieces & self.bishops) + pieces_lightb = chess.popcount(chess.BB_LIGHT_SQUARES & pieces & self.bishops) pieces_num = chess.popcount(pieces) - pieces_oppositeb_of = lambda square_color: pieces_darkb() if square_color == chess.WHITE else pieces_lightb() - pieces_sameb_as = lambda square_color: pieces_lightb() if square_color == chess.WHITE else pieces_darkb() + pieces_oppositeb_of = lambda square_color: pieces_darkb if square_color == chess.WHITE else pieces_lightb + pieces_sameb_as = lambda square_color: pieces_lightb if square_color == chess.WHITE else pieces_darkb pieces_of_type_not = lambda piece: pieces_num - piece - has_bishop_pair = lambda side: (horde_lightb >= 1 and horde_darkb >= 1) if side == chess.WHITE else (pieces_lightb() >= 1 and pieces_darkb() >= 1) + has_bishop_pair = lambda side: (horde_lightb >= 1 and horde_darkb >= 1) if side == chess.WHITE else (pieces_lightb >= 1 and pieces_darkb >= 1) if horde_num == 0: return True @@ -515,7 +515,7 @@ def has_insufficient_material(self, color: chess.Color) -> bool: # friendly pawn/opposite-color-bishop/rook/queen on C2. # A rook on B8 and a bishop C3 mate a king on A1 when there is a friendly # knight on A2. - if not (horde_num == 2 and rooks == 1 and bishops == 1 and pieces_of_type_not(pieces_sameb_as(horde_bishop_co())) == 1): + if not (horde_num == 2 and rooks == 1 and bishops == 1 and pieces_of_type_not(pieces_sameb_as(horde_bishop_co)) == 1): return False if horde_num == 1: @@ -533,8 +533,8 @@ def has_insufficient_material(self, color: chess.Color) -> bool: return not ( pieces_pawns >= 1 or pieces_rooks >= 1 or - pieces_lightb() >= 2 or - pieces_darkb() >= 2 + pieces_lightb >= 2 or + pieces_darkb >= 2 ) elif pawns == 1: # Promote the pawn to a queen or a knight and check whether @@ -570,8 +570,8 @@ def has_insufficient_material(self, color: chess.Color) -> bool: # For example a king on A3 can be mated if there is # a pawn/opposite-color-bishop on A4, a pawn/opposite-color-bishop on # B3, a pawn/bishop/rook/queen on A2 and any other piece on B2. - pieces_oppositeb_of(horde_bishop_co()) >= 2 or - (pieces_oppositeb_of(horde_bishop_co()) >= 1 and pieces_pawns >= 1) or + pieces_oppositeb_of(horde_bishop_co) >= 2 or + (pieces_oppositeb_of(horde_bishop_co) >= 1 and pieces_pawns >= 1) or pieces_pawns >= 2 ) elif knights == 1: @@ -592,8 +592,8 @@ def has_insufficient_material(self, color: chess.Color) -> bool: (pieces_bishops >= 1 and pieces_pawns >= 1) or (has_bishop_pair(chess.BLACK) and pieces_pawns >= 1) ) and - (pieces_of_type_not(pieces_darkb()) >= 3 if pieces_darkb() >= 2 else True) and - (pieces_of_type_not(pieces_lightb()) >= 3 if pieces_lightb() >= 2 else True) + (pieces_of_type_not(pieces_darkb) >= 3 if pieces_darkb >= 2 else True) and + (pieces_of_type_not(pieces_lightb) >= 3 if pieces_lightb >= 2 else True) ) # By this point, we only need to deal with white's minor pieces. @@ -623,11 +623,11 @@ def has_insufficient_material(self, color: chess.Color) -> bool: return not ( # A king on A1 obstructed by a pawn/opposite-color-bishop on # A2 is mated by a knight on D2 and a bishop on C3. - pieces_pawns >= 1 or pieces_oppositeb_of(horde_bishop_co()) >= 1 or + pieces_pawns >= 1 or pieces_oppositeb_of(horde_bishop_co) >= 1 or # A king on A1 bounded by two friendly pieces on A2 and B1 is # mated when the knight moves from D4 to C2 so that both the # knight and the bishop deliver check. - pieces_of_type_not(pieces_sameb_as(horde_bishop_co())) >= 3 + pieces_of_type_not(pieces_sameb_as(horde_bishop_co)) >= 3 ) else: # The horde has two or more bishops on the same color. @@ -639,10 +639,10 @@ def has_insufficient_material(self, color: chess.Color) -> bool: # bishops on B2 and C3. This position is theoretically # achievable even when black has two pawns or when they # have a pawn and an opposite color bishop. - (pieces_pawns >= 1 and pieces_oppositeb_of(horde_bishop_co()) >= 1) or + (pieces_pawns >= 1 and pieces_oppositeb_of(horde_bishop_co) >= 1) or (pieces_pawns >= 1 and pieces_knights >= 1) or - (pieces_oppositeb_of(horde_bishop_co()) >= 1 and pieces_knights >= 1) or - (pieces_oppositeb_of(horde_bishop_co()) >= 2) or + (pieces_oppositeb_of(horde_bishop_co) >= 1 and pieces_knights >= 1) or + (pieces_oppositeb_of(horde_bishop_co) >= 2) or pieces_knights >= 2 or pieces_pawns >= 2 # In every other case, white can only draw. From ad366ca0f39f2bacef9457bcbda7e90121cf3dbe Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 11 May 2021 11:56:20 +0200 Subject: [PATCH 212/613] Fix false negative in Horde insufficient material test --- test.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/test.py b/test.py index d46317158..aa8e609b8 100755 --- a/test.py +++ b/test.py @@ -573,7 +573,7 @@ def _check(board, white, black): _check(chess.variant.CrazyhouseBoard("8/5k2/8/8/8/5B2/3KB3/8[] w - - 0 1"), False, False) _check(chess.variant.CrazyhouseBoard("8/8/8/8/3k4/3N~4/3K4/8 w - - 0 1"), False, False) - _check(chess.variant.HordeBoard("8/5k2/8/8/8/4NN2/8/8 w - - 0 1"), false_negative, False) + _check(chess.variant.HordeBoard("8/5k2/8/8/8/4NN2/8/8 w - - 0 1"), True, False) def test_promotion_with_check(self): board = chess.Board("8/6P1/2p5/1Pqk4/6P1/2P1RKP1/4P1P1/8 w - - 0 1") From a024d3e1381d5a6a10eef97053ab5951ff9da89a Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 11 May 2021 11:58:49 +0200 Subject: [PATCH 213/613] flake8 does not like assigning lambdas :shrug: --- chess/variant.py | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/chess/variant.py b/chess/variant.py index 5d7608030..4cdcd04a3 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -491,10 +491,18 @@ def has_insufficient_material(self, color: chess.Color) -> bool: pieces_darkb = chess.popcount(chess.BB_DARK_SQUARES & pieces & self.bishops) pieces_lightb = chess.popcount(chess.BB_LIGHT_SQUARES & pieces & self.bishops) pieces_num = chess.popcount(pieces) - pieces_oppositeb_of = lambda square_color: pieces_darkb if square_color == chess.WHITE else pieces_lightb - pieces_sameb_as = lambda square_color: pieces_lightb if square_color == chess.WHITE else pieces_darkb - pieces_of_type_not = lambda piece: pieces_num - piece - has_bishop_pair = lambda side: (horde_lightb >= 1 and horde_darkb >= 1) if side == chess.WHITE else (pieces_lightb >= 1 and pieces_darkb >= 1) + + def pieces_oppositeb_of(square_color: chess.Color) -> int: + return pieces_darkb if square_color == chess.WHITE else pieces_lightb + + def pieces_sameb_as(square_color: chess.Color) -> int: + return pieces_lightb if square_color == chess.WHITE else pieces_darkb + + def pieces_of_type_not(piece: int) -> int: + return pieces_num - piece + + def has_bishop_pair(side: chess.Color) -> bool: + return (horde_lightb >= 1 and horde_darkb >= 1) if side == chess.WHITE else (pieces_lightb >= 1 and pieces_darkb >= 1) if horde_num == 0: return True From fa5ab65c015b3dac7e15f8a5b9a0a93bc054adfb Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 11 May 2021 12:03:04 +0200 Subject: [PATCH 214/613] No need to copy HordeBoard via FEN --- chess/variant.py | 14 +++----------- 1 file changed, 3 insertions(+), 11 deletions(-) diff --git a/chess/variant.py b/chess/variant.py index 4cdcd04a3..9580d723b 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -506,16 +506,13 @@ def has_bishop_pair(side: chess.Color) -> bool: if horde_num == 0: return True - if horde_num >= 4: # Four or more white pieces can always deliver mate. return False - if (pawns >= 1 or queens >= 1) and horde_num >= 2: # Pawns/queens are never insufficient material when paired with any other # piece (a pawn promotes to a queen and delivers mate). return False - if rooks >= 1 and horde_num >= 2: # A rook is insufficient material only when it is paired with a bishop # against a lone king. The horde can mate in any other case. @@ -548,9 +545,9 @@ def has_bishop_pair(side: chess.Color) -> bool: # Promote the pawn to a queen or a knight and check whether # white can mate. pawn_square = chess.SquareSet(self.pawns & white).pop() - promote_to_queen = HordeBoard(self.fen()) + promote_to_queen = self.copy(stack=False) promote_to_queen.set_piece_at(pawn_square, chess.Piece(chess.QUEEN, chess.WHITE)) - promote_to_knight = HordeBoard(self.fen()) + promote_to_knight = self.copy(stack=False) promote_to_knight.set_piece_at(pawn_square, chess.Piece(chess.KNIGHT, chess.WHITE)) return promote_to_queen.has_insufficient_material(chess.WHITE) and promote_to_knight.has_insufficient_material(chess.WHITE) elif rooks == 1: @@ -603,11 +600,7 @@ def has_bishop_pair(side: chess.Color) -> bool: (pieces_of_type_not(pieces_darkb) >= 3 if pieces_darkb >= 2 else True) and (pieces_of_type_not(pieces_lightb) >= 3 if pieces_lightb >= 2 else True) ) - - # By this point, we only need to deal with white's minor pieces. - - elif horde_num == 2: - + elif horde_num == 2: # By this point, we only need to deal with white's minor pieces. if pieces_num == 1: # Two minor pieces cannot mate a lone king. return True @@ -655,7 +648,6 @@ def has_bishop_pair(side: chess.Color) -> bool: pieces_pawns >= 2 # In every other case, white can only draw. ) - elif horde_num == 3: # A king in the corner is mated by two knights and a bishop or three # knights or the bishop pair and a knight/bishop. From 9714059e343e4b0eaef07e24133ceb73c3e5a3d0 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 11 May 2021 12:08:53 +0200 Subject: [PATCH 215/613] Update Python 3.10.x to 3.10.0-beta.1 for test suite --- .github/workflows/test.yml | 80 +++++++++++++++++++------------------- 1 file changed, 40 insertions(+), 40 deletions(-) diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index 64c82e11e..f853ab976 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -7,58 +7,58 @@ jobs: strategy: matrix: os: [ubuntu-latest, windows-latest] - python-version: ["3.7", "3.8", "3.9", "3.10.0-alpha.2"] + python-version: ["3.7", "3.8", "3.9", "3.10.0-beta.1"] runs-on: ${{ matrix.os }} steps: - - uses: actions/checkout@v2 - - uses: actions/setup-python@v2 - with: - python-version: ${{ matrix.python-version }} - - run: .github/workflows/setup-${{ matrix.os }}.sh - shell: bash - - run: pip install -e . - - run: python test.py -v + - uses: actions/checkout@v2 + - uses: actions/setup-python@v2 + with: + python-version: ${{ matrix.python-version }} + - run: .github/workflows/setup-${{ matrix.os }}.sh + shell: bash + - run: pip install -e . + - run: python test.py -v perft: runs-on: ubuntu-latest steps: - - uses: actions/checkout@v2 - - uses: actions/setup-python@v2 - with: - python-version: "3.10.0-alpha.2" - - run: pip install -e . - - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000 - - run: python examples/perft/perft.py -t 1 examples/perft/tricky.perft - - run: python examples/perft/perft.py -t 1 --variant giveaway examples/perft/giveaway.perft - - run: python examples/perft/perft.py -t 1 --variant atomic examples/perft/atomic.perft - - run: python examples/perft/perft.py -t 1 --variant racingkings examples/perft/racingkings.perft - - run: python examples/perft/perft.py -t 1 --variant horde examples/perft/horde.perft - - run: python examples/perft/perft.py -t 1 --variant crazyhouse examples/perft/crazyhouse.perft + - uses: actions/checkout@v2 + - uses: actions/setup-python@v2 + with: + python-version: "3.10.0-alpha.2" + - run: pip install -e . + - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000 + - run: python examples/perft/perft.py -t 1 examples/perft/tricky.perft + - run: python examples/perft/perft.py -t 1 --variant giveaway examples/perft/giveaway.perft + - run: python examples/perft/perft.py -t 1 --variant atomic examples/perft/atomic.perft + - run: python examples/perft/perft.py -t 1 --variant racingkings examples/perft/racingkings.perft + - run: python examples/perft/perft.py -t 1 --variant horde examples/perft/horde.perft + - run: python examples/perft/perft.py -t 1 --variant crazyhouse examples/perft/crazyhouse.perft mypy: strategy: matrix: - python-version: ["3.8", "3.9", "3.10.0-alpha.2"] + python-version: ["3.8", "3.9", "3.10.0-beta.1"] runs-on: ubuntu-latest steps: - - uses: actions/checkout@v2 - - uses: actions/setup-python@v2 - with: - python-version: ${{ matrix.python-version }} - - run: pip install -e . - - run: pip install mypy - - run: python -m mypy --strict chess - - run: python -m mypy --strict examples/**/*.py + - uses: actions/checkout@v2 + - uses: actions/setup-python@v2 + with: + python-version: ${{ matrix.python-version }} + - run: pip install -e . + - run: pip install mypy + - run: python -m mypy --strict chess + - run: python -m mypy --strict examples/**/*.py readme: strategy: matrix: - python-version: ["3.7", "3.8", "3.9", "3.10.0-alpha.2"] + python-version: ["3.7", "3.8", "3.9", "3.10.0-beta.1"] runs-on: ubuntu-latest steps: - - uses: actions/checkout@v2 - - uses: actions/setup-python@v2 - with: - python-version: ${{ matrix.python-version }} - - run: sudo apt-get update && sudo apt-get install -y docutils-common - - run: python setup.py --long-description | rst2html --strict --no-raw > /dev/null - - run: pip install -e . - - run: .github/workflows/setup-ubuntu-latest.sh - - run: python -m doctest README.rst + - uses: actions/checkout@v2 + - uses: actions/setup-python@v2 + with: + python-version: ${{ matrix.python-version }} + - run: sudo apt-get update && sudo apt-get install -y docutils-common + - run: python setup.py --long-description | rst2html --strict --no-raw > /dev/null + - run: pip install -e . + - run: .github/workflows/setup-ubuntu-latest.sh + - run: python -m doctest README.rst From 4ce322458f98dd14c20984767eae48506b414ff1 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 11 May 2021 12:14:23 +0200 Subject: [PATCH 216/613] Doctest only on 3.10.x due to enum repr change --- .github/workflows/test.yml | 2 +- README.rst | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index f853ab976..21aac88f3 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -50,7 +50,7 @@ jobs: readme: strategy: matrix: - python-version: ["3.7", "3.8", "3.9", "3.10.0-beta.1"] + python-version: ["3.10.0-beta.1"] runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 diff --git a/README.rst b/README.rst index f02d0e584..37506a259 100644 --- a/README.rst +++ b/README.rst @@ -131,7 +131,7 @@ Features >>> board.is_insufficient_material() False >>> board.outcome() - Outcome(termination=, winner=True) + Outcome(termination=Termination.CHECKMATE, winner=True) * Detects repetitions. Has a half-move clock. From 2718302abb40d7b8c07290bb2a1ff0a6d11813de Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Sun, 16 May 2021 12:51:43 -0700 Subject: [PATCH 217/613] Notify engines of draw offers Only works for XBoard engines since the UCI protocol has no facility for offering or accepting draws. --- chess/engine.py | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 729272ce7..2968a2a01 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1078,7 +1078,7 @@ async def configure(self, options: ConfigMapping) -> None: """ @abc.abstractmethod - async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult: + async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult: """ Plays a position. @@ -1097,6 +1097,7 @@ async def play(self, board: chess.Board, limit: Limit, *, game: object = None, i extra information. :param ponder: Whether the engine should keep analysing in the background even after the result has been returned. + :param draw_offered: Whether the engine's opponent has offered a draw. :param root_moves: Optional. Consider only root moves from this list. :param options: Optional. A dictionary of engine options for the analysis. The previous configuration will be restored after the @@ -1529,7 +1530,7 @@ def _go(self, limit: Limit, *, root_moves: Optional[Iterable[chess.Move]] = None builder.append("0000") self.send_line(" ".join(builder)) - async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult: + async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult: same_game = not self.first_game and game == self.game and not options self.last_move = board.move_stack[-1] if (same_game and ponder and board.move_stack) else chess.Move.null() @@ -2070,7 +2071,7 @@ def line_received(self, engine: XBoardProtocol, line: str) -> None: return await self.communicate(XBoardPingCommand) - async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult: + async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult: if root_moves is not None: raise EngineError("play with root_moves, but xboard supports 'include' only in analysis mode") @@ -2111,6 +2112,9 @@ def start(self, engine: XBoardProtocol) -> None: if limit.black_clock is not None: engine.send_line("{} {}".format("otim" if board.turn else "time", max(1, int(limit.black_clock * 100)))) + if draw_offered: + engine.send_line("draw") + # Start thinking. engine.send_line("post" if info else "nopost") engine.send_line("hard" if ponder else "easy") From 750f0d6538cdf573d849c5d316803178ef1dadac Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sun, 16 May 2021 22:55:17 +0200 Subject: [PATCH 218/613] UCI engines do not support draw offers (#781) --- chess/engine.py | 1 + 1 file changed, 1 insertion(+) diff --git a/chess/engine.py b/chess/engine.py index 2968a2a01..e547653c2 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1098,6 +1098,7 @@ async def play(self, board: chess.Board, limit: Limit, *, game: object = None, i :param ponder: Whether the engine should keep analysing in the background even after the result has been returned. :param draw_offered: Whether the engine's opponent has offered a draw. + Ignored by UCI engines. :param root_moves: Optional. Consider only root moves from this list. :param options: Optional. A dictionary of engine options for the analysis. The previous configuration will be restored after the From 34bcb49918360ab9910d400cb168fcbc2ca3b642 Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Sun, 16 May 2021 22:45:02 -0700 Subject: [PATCH 219/613] Make sure engines support draw offers XBoard engines are allowed to declare `feature draw=0` to stop any notification of draw offers. --- chess/engine.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index e547653c2..07b9d1d0c 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -2113,7 +2113,7 @@ def start(self, engine: XBoardProtocol) -> None: if limit.black_clock is not None: engine.send_line("{} {}".format("otim" if board.turn else "time", max(1, int(limit.black_clock * 100)))) - if draw_offered: + if draw_offered and engine.features.get("draw", 1): engine.send_line("draw") # Start thinking. From d0b2204b345812e1f212152b4e4880bb1945c453 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sun, 16 May 2021 23:38:55 +0200 Subject: [PATCH 220/613] Remove duplicate import --- chess/engine.py | 1 - 1 file changed, 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index 07b9d1d0c..d36ce8fdd 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -19,7 +19,6 @@ import abc import asyncio import collections -import copy import concurrent.futures import contextlib import copy From d3fd716216cff34903390c154410e083811fd35a Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 2 Jun 2021 12:35:46 +0200 Subject: [PATCH 221/613] Clarify that SVG Tiny version is 1.2 --- docs/svg.rst | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/docs/svg.rst b/docs/svg.rst index b839f10a7..2893bed63 100644 --- a/docs/svg.rst +++ b/docs/svg.rst @@ -1,12 +1,12 @@ SVG rendering ============= -The :mod:`chess.svg` module renders SVG Tiny images (mostly for IPython/Jupyter -Notebook integration). The piece images by +The :mod:`chess.svg` module renders SVG Tiny 1.2 images +(mostly for IPython/Jupyter Notebook integration). +The piece images by `Colin M.L. Burnett `_ are triple licensed under the GFDL, BSD and GPL. - .. autofunction:: chess.svg.piece .. autofunction:: chess.svg.board From 4f4ae6cdbc946968088803ebb4fb2fd615da7c06 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 2 Jun 2021 12:41:05 +0200 Subject: [PATCH 222/613] Forwards compatibility with SVG 2 https://www.w3.org/TR/SVG2/linking.html#XLinkRefAttrs --- chess/svg.py | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/chess/svg.py b/chess/svg.py index 7f4f935a9..fdc713315 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -374,14 +374,17 @@ def board(board: Optional[chess.BaseBoard] = None, *, if board is not None: piece = board.piece_at(square) if piece: + href = f"#{chess.COLOR_NAMES[piece.color]}-{chess.PIECE_NAMES[piece.piece_type]}" ET.SubElement(svg, "use", { - "xlink:href": f"#{chess.COLOR_NAMES[piece.color]}-{chess.PIECE_NAMES[piece.piece_type]}", + "href": href, + "xlink:href": href, "transform": f"translate({x:d}, {y:d})", }) # Render selected squares. if squares is not None and square in squares: ET.SubElement(svg, "use", _attrs({ + "href": "#xx", "xlink:href": "#xx", "x": x, "y": y, From e7d07fd256b692e8b24d26b81f8c8e38581b71f2 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 4 Jun 2021 10:59:04 +0200 Subject: [PATCH 223/613] Bump SVG version and specify baseProfile --- chess/svg.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/chess/svg.py b/chess/svg.py index fdc713315..91dae3c60 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -166,8 +166,9 @@ def _repr_svg_(self) -> SvgWrapper: def _svg(viewbox: int, size: Optional[int]) -> ET.Element: svg = ET.Element("svg", { "xmlns": "http://www.w3.org/2000/svg", - "version": "1.1", "xmlns:xlink": "http://www.w3.org/1999/xlink", + "version": "1.2", + "baseProfile": "tiny", "viewBox": f"0 0 {viewbox:d} {viewbox:d}", }) From 1d52ea644111d638b841ca9d637d31b55e6b753f Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 9 Jun 2021 14:48:47 +0200 Subject: [PATCH 224/613] Fix slightly off-center pawns in chess.svg --- chess/svg.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/chess/svg.py b/chess/svg.py index 91dae3c60..177ffe02b 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -36,13 +36,13 @@ "b": """""", # noqa: E501 "k": """""", # noqa: E501 "n": """""", # noqa: E501 - "p": """""", # noqa: E501 + "p": """""", # noqa: E501 "q": """""", # noqa: E501 "r": """""", # noqa: E501 "B": """""", # noqa: E501 "K": """""", # noqa: E501 "N": """""", # noqa: E501 - "P": """""", # noqa: E501 + "P": """""", # noqa: E501 "Q": """""", # noqa: E501 "R": """""", # noqa: E501 } From 6d36418c1ab2bc560ca800d3087314b0cedb6598 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 9 Jun 2021 15:32:16 +0200 Subject: [PATCH 225/613] Fix mypy error if int.bit_count exists --- chess/__init__.py | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index 793d1aed1..0454800cc 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -281,12 +281,8 @@ def scan_reversed(bb: Bitboard) -> Iterator[Square]: yield r bb ^= BB_SQUARES[r] -try: - # Python 3.10 - popcount: Callable[[Bitboard], int] = int.bit_count # type: ignore -except AttributeError: - def popcount(bb: Bitboard) -> int: - return bin(bb).count("1") +# Python 3.10 or fallback. +popcount: Callable[[Bitboard], int] = getattr(int, "bit_count", lambda bb: bin(bb).count("1")) def flip_vertical(bb: Bitboard) -> Bitboard: # https://www.chessprogramming.org/Flipping_Mirroring_and_Rotating#FlipVertically From 2dcc8abc20c9956a7c49e49af98522a4bca22ea0 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 11 Jun 2021 16:07:59 +0200 Subject: [PATCH 226/613] Prepare 1.6.0 --- CHANGELOG.rst | 23 +++++++++++++++++++++++ chess/__init__.py | 2 +- release.py | 1 + 3 files changed, 25 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 5eb6fac96..65ed73b12 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,6 +1,29 @@ Changelog for python-chess ========================== +New in v1.6.0 +------------- + +New features: + +* Allow offering a draw to XBoard engines using + ``chess.engine.Protocol.play(..., draw_offered=True)``. +* Now detects insufficient material in Horde. Thanks @stevepapazis! + +Changes: + +* ``chess.engine.popen_engine(..., setpgrp=True)`` on Windows now merges + ``CREATE_NEW_PROCESS_GROUP`` into ``creationflags`` instead of overriding. + On Unix it now uses ``start_new_session`` instead of calling ``setpgrp`` in + ``preexec_fn``. +* Declare that ``chess.svg`` produces SVG Tiny 1.2, and prepare SVG 2 forwards + compatibility. + +Bugfixes: + +* Fix slightly off-center pawns in ``chess.svg``. +* Fix typing error in Python 3.10 (due to added ``int.bit_count``). + New in v1.5.0 ------------- diff --git a/chess/__init__.py b/chess/__init__.py index 0454800cc..b3818b319 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -27,7 +27,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.5.0" +__version__ = "1.6.0" import collections import copy diff --git a/release.py b/release.py index 0d0336057..099dd4a98 100755 --- a/release.py +++ b/release.py @@ -25,6 +25,7 @@ def check_git(): print(f"master is {behind} commit(s) behind origin/master") sys.exit(1) + def test(): print("--- TEST ---------------------------------------------------------") system("tox --skip-missing-interpreters") From cce37793788dd19554297bb9f60889bc19656e4f Mon Sep 17 00:00:00 2001 From: Mark Harrison Date: Fri, 11 Jun 2021 18:31:48 -0700 Subject: [PATCH 227/613] Handle draw offers in SimpleEngine --- chess/engine.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index d36ce8fdd..7dcc11a53 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -2723,10 +2723,10 @@ def ping(self) -> None: future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop) return future.result() - def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult: + def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult: with self._not_shut_down(): coro = asyncio.wait_for( - self.protocol.play(board, limit, game=game, info=info, ponder=ponder, root_moves=root_moves, options=options), + self.protocol.play(board, limit, game=game, info=info, ponder=ponder, draw_offered=draw_offered, root_moves=root_moves, options=options), self._timeout_for(limit)) future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop) return future.result() From 4156d3a7c8056432452e5a9c796b520633224dbd Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 12 Jun 2021 10:20:35 +0200 Subject: [PATCH 228/613] Prepare 1.6.1 --- CHANGELOG.rst | 8 ++++++++ chess/__init__.py | 2 +- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 65ed73b12..1e6f941dc 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,6 +1,14 @@ Changelog for python-chess ========================== +New in v1.6.1 +------------- + +Bugfixes: + +* Make ``chess.engine.SimpleEngine.play(..., draw_offered=True)`` available. + Previously only added for ``chess.engine.Protocol``. + New in v1.6.0 ------------- diff --git a/chess/__init__.py b/chess/__init__.py index b3818b319..c5cfb3900 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -27,7 +27,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.6.0" +__version__ = "1.6.1" import collections import copy From 9a5f01bd42082ea77f4fdca5c5b16fb8ab48ce8d Mon Sep 17 00:00:00 2001 From: Christian Korn Date: Mon, 21 Jun 2021 10:14:54 +0200 Subject: [PATCH 229/613] Correcting likely copy / paste error in test (#792) * Correcting likely copy / paste error in test I think the caro kann mate is suppsoed to be tested here, not the starting position * Fixing editing error... sorry. --- test.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/test.py b/test.py index aa8e609b8..07cd0413a 100755 --- a/test.py +++ b/test.py @@ -1687,7 +1687,7 @@ def test_nonzero(self): caro_kann_mate = chess.Board("r1bqkb1r/pp1npppp/2pN1n2/8/3P4/8/PPP1QPPP/R1B1KBNR b KQkq - 4 6") self.assertFalse(caro_kann_mate.legal_moves) - self.assertTrue(chess.Board().pseudo_legal_moves) + self.assertTrue(caro_kann_mate.pseudo_legal_moves) def test_string_conversion(self): board = chess.Board("r3k1nr/ppq1pp1p/2p3p1/8/1PPR4/2N5/P3QPPP/5RK1 b kq b3 0 16") From 71816bb7e9addafa3a3f9632aaea523a70e8300f Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 23 Jun 2021 11:08:27 +0200 Subject: [PATCH 230/613] Let tox skip doctests before Python 3.10 --- tox.ini | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tox.ini b/tox.ini index 13a3dc90a..3eeb764ba 100644 --- a/tox.ini +++ b/tox.ini @@ -10,6 +10,14 @@ commands = python test.py --verbose python -m doctest README.rst --verbose +[testenv:{py37,py38,py39}] +passenv = LD_LIBRARY_PATH +whitelist_externals = + stockfish + crafty +commands = + python test.py --verbose + [flake8] ignore = E126 E131 # Allow over-indent and unaligned indent From 5a0e0da44c96b6d5992c0e4a372bee32da236270 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 23 Jun 2021 11:11:31 +0200 Subject: [PATCH 231/613] Fix centipawn normalization in sf12 WDL model --- chess/engine.py | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index 7dcc11a53..b8d6e7aad 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -625,7 +625,8 @@ def _sf12_wins(cp: int, *, ply: int) -> int: m = min(240, max(ply, 0)) / 64 a = (((-8.24404295 * m + 64.23892342) * m + -95.73056462) * m) + 153.86478679 b = (((-3.37154371 * m + 28.44489198) * m + -56.67657741) * m) + 72.05858751 - x = min(1000, max(cp, -1000)) + pawn_value_eg = 208 + x = min(1000, max(cp * 100 / pawn_value_eg, -1000)) return int(0.5 + 1000 / (1 + math.exp((a - x) / b))) def _lichess_raw_wins(cp: int) -> int: From 14f56f95916cedc9bd7adfa1ae8dc3fb1f1a888d Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 23 Jun 2021 11:24:59 +0200 Subject: [PATCH 232/613] Add WDL model for Stockfish development version --- chess/engine.py | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index b8d6e7aad..fd07bd790 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -44,7 +44,7 @@ try: from typing import Literal - _WdlModel = Literal["sf12", "lichess"] + _WdlModel = Literal["sf14", "sf12", "lichess"] except ImportError: # Before Python 3.8. _WdlModel = str # type: ignore @@ -559,6 +559,8 @@ def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: 0.015... :param model: + * ``sf14``, the WDL model used by the current development version + of Stockfish. Still subject to change or removal. * ``sf12``, the WDL model used by Stockfish 12. * ``lichess``, the win rate model used by Lichess. Does not use *ply*, and does not consider drawing chances. @@ -620,6 +622,15 @@ def __ge__(self, other: object) -> bool: return NotImplemented +def _sf14_wins(cp: int, *, ply: int) -> int: + # TODO: When released, add permalink and update documentation. + m = min(240, max(ply, 0)) / 64 + a = (((-3.68389304 * m + 30.07065921) * m + -60.52878723) * m) + 149.53378557 + b = (((-2.01818570 * m + 15.85685038) * m + -29.83452023) * m) + 47.59078827 + pawn_value_eg = 208 + x = min(2000, max(cp * 100 / pawn_value_eg, -2000)) + return int(0.5 + 1000 / (1 + math.exp((a - x) / b))) + def _sf12_wins(cp: int, *, ply: int) -> int: # https://github.com/official-stockfish/Stockfish/blob/sf_12/src/uci.cpp#L198-L218 m = min(240, max(ply, 0)) / 64 @@ -649,6 +660,9 @@ def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: if model == "lichess": wins = _lichess_raw_wins(max(-1000, min(self.cp, 1000))) losses = 1000 - wins + elif model == "sf14": + wins = _sf14_wins(self.cp, ply=ply) + losses = _sf14_wins(-self.cp, ply=ply) else: wins = _sf12_wins(self.cp, ply=ply) losses = _sf12_wins(-self.cp, ply=ply) From 9d1aa6eb47798041a2bbb129857ceac72d5b1a90 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 23 Jun 2021 11:38:46 +0200 Subject: [PATCH 233/613] Undo centipawn normalization for Stockfish WDL models --- chess/engine.py | 6 ++---- test.py | 4 ++++ 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index fd07bd790..308fb4605 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -627,8 +627,7 @@ def _sf14_wins(cp: int, *, ply: int) -> int: m = min(240, max(ply, 0)) / 64 a = (((-3.68389304 * m + 30.07065921) * m + -60.52878723) * m) + 149.53378557 b = (((-2.01818570 * m + 15.85685038) * m + -29.83452023) * m) + 47.59078827 - pawn_value_eg = 208 - x = min(2000, max(cp * 100 / pawn_value_eg, -2000)) + x = min(2000, max(cp, -2000)) return int(0.5 + 1000 / (1 + math.exp((a - x) / b))) def _sf12_wins(cp: int, *, ply: int) -> int: @@ -636,8 +635,7 @@ def _sf12_wins(cp: int, *, ply: int) -> int: m = min(240, max(ply, 0)) / 64 a = (((-8.24404295 * m + 64.23892342) * m + -95.73056462) * m) + 153.86478679 b = (((-3.37154371 * m + 28.44489198) * m + -56.67657741) * m) + 72.05858751 - pawn_value_eg = 208 - x = min(1000, max(cp * 100 / pawn_value_eg, -1000)) + x = min(1000, max(cp, -1000)) return int(0.5 + 1000 / (1 + math.exp((a - x) / b))) def _lichess_raw_wins(cp: int) -> int: diff --git a/test.py b/test.py index 07cd0413a..4051a8384 100755 --- a/test.py +++ b/test.py @@ -2867,6 +2867,10 @@ def test_score(self): self.assertFalse(chess.engine.Wdl(0, 0, 0)) + def test_wdl_model(self): + self.assertEqual(chess.engine.Cp(131).wdl(model="sf12", ply=25), chess.engine.Wdl(524, 467, 9)) + self.assertEqual(chess.engine.Cp(146).wdl(model="sf14", ply=25), chess.engine.Wdl(601, 398, 1)) + @catchAndSkip(FileNotFoundError, "need stockfish") def test_sf_forced_mates(self): with chess.engine.SimpleEngine.popen_uci("stockfish", debug=True) as engine: From d0cfb2415a7326a6a8a345582f958b46d6befbd0 Mon Sep 17 00:00:00 2001 From: vladimir Date: Mon, 28 Jun 2021 19:18:16 +0300 Subject: [PATCH 234/613] piece_map_by_color added --- chess/__init__.py | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/chess/__init__.py b/chess/__init__.py index c5cfb3900..de916993f 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -1023,6 +1023,15 @@ def piece_map(self) -> Dict[Square, Piece]: result[square] = typing.cast(Piece, self.piece_at(square)) return result + def piece_map_by_color(self, color: Color) -> Dict[Square, Piece]: + """ + Gets a dictionary of :class:`pieces ` by square index. + """ + result = {} + for square in scan_reversed(self.occupied_co[color]): + result[square] = typing.cast(Piece, self.piece_at(square)) + return result + def _set_piece_map(self, pieces: Mapping[Square, Piece]) -> None: self._clear_board() for square, piece in pieces.items(): From 24c39e7bd9a07a017cd2c585c0ae17ad131bfc03 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sun, 4 Jul 2021 11:15:54 +0200 Subject: [PATCH 235/613] Combine piece_map methods (#793) --- chess/__init__.py | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index de916993f..25ca18344 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -1014,21 +1014,12 @@ def set_board_fen(self, fen: str) -> None: """ self._set_board_fen(fen) - def piece_map(self) -> Dict[Square, Piece]: + def piece_map(self, *, mask: Bitboard = BB_ALL) -> Dict[Square, Piece]: """ Gets a dictionary of :class:`pieces ` by square index. """ result = {} - for square in scan_reversed(self.occupied): - result[square] = typing.cast(Piece, self.piece_at(square)) - return result - - def piece_map_by_color(self, color: Color) -> Dict[Square, Piece]: - """ - Gets a dictionary of :class:`pieces ` by square index. - """ - result = {} - for square in scan_reversed(self.occupied_co[color]): + for square in scan_reversed(self.occupied & mask): result[square] = typing.cast(Piece, self.piece_at(square)) return result From 92657ae6b9a33f0dd8db310617b28510a317a1ad Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sun, 4 Jul 2021 11:33:10 +0200 Subject: [PATCH 236/613] Update default WDL model --- chess/engine.py | 27 ++++++++++++++------------- 1 file changed, 14 insertions(+), 13 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 308fb4605..af4b12012 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -44,7 +44,7 @@ try: from typing import Literal - _WdlModel = Literal["sf14", "sf12", "lichess"] + _WdlModel = Literal["sf", "sf14", "sf12", "lichess"] except ImportError: # Before Python 3.8. _WdlModel = str # type: ignore @@ -463,7 +463,7 @@ def is_mate(self) -> bool: """Tests if this is a mate score.""" return self.relative.is_mate() - def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> PovWdl: + def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> PovWdl: """See :func:`~chess.engine.Score.wdl()`.""" return PovWdl(self.relative.wdl(), self.turn) @@ -540,7 +540,7 @@ def is_mate(self) -> bool: return self.mate() is not None @abc.abstractmethod - def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: + def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> Wdl: """ Returns statistics for the expected outcome of this game, based on a *model*, given that this score is reached at *ply*. @@ -559,8 +559,9 @@ def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: 0.015... :param model: - * ``sf14``, the WDL model used by the current development version - of Stockfish. Still subject to change or removal. + * ``sf``, the WDL model used by the latest Stockfish + (currently ``sf14``). + * ``sf14``, the WDL model used by Stockfish 14. * ``sf12``, the WDL model used by Stockfish 12. * ``lichess``, the win rate model used by Lichess. Does not use *ply*, and does not consider drawing chances. @@ -623,7 +624,7 @@ def __ge__(self, other: object) -> bool: def _sf14_wins(cp: int, *, ply: int) -> int: - # TODO: When released, add permalink and update documentation. + # https://github.com/official-stockfish/Stockfish/blob/sf_14/src/uci.cpp#L200-L220 m = min(240, max(ply, 0)) / 64 a = (((-3.68389304 * m + 30.07065921) * m + -60.52878723) * m) + 149.53378557 b = (((-2.01818570 * m + 15.85685038) * m + -29.83452023) * m) + 47.59078827 @@ -654,16 +655,16 @@ def mate(self) -> None: def score(self, *, mate_score: Optional[int] = None) -> int: return self.cp - def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: + def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> Wdl: if model == "lichess": wins = _lichess_raw_wins(max(-1000, min(self.cp, 1000))) losses = 1000 - wins - elif model == "sf14": - wins = _sf14_wins(self.cp, ply=ply) - losses = _sf14_wins(-self.cp, ply=ply) - else: + elif model == "sf12": wins = _sf12_wins(self.cp, ply=ply) losses = _sf12_wins(-self.cp, ply=ply) + else: + wins = _sf14_wins(self.cp, ply=ply) + losses = _sf14_wins(-self.cp, ply=ply) draws = 1000 - wins - losses return Wdl(wins, draws, losses) @@ -704,7 +705,7 @@ def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: else: return -mate_score - self.moves - def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: + def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> Wdl: if model == "lichess": cp = (21 - min(10, abs(self.moves))) * 100 wins = _lichess_raw_wins(cp) @@ -741,7 +742,7 @@ def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: ... def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: return mate_score - def wdl(self, *, model: _WdlModel = "sf12", ply: int = 30) -> Wdl: + def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> Wdl: return Wdl(1000, 0, 0) def __neg__(self) -> Mate: From b25ce005a8874cc7c1fe18edce7e520ae22cf3ad Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 5 Jul 2021 19:05:18 +0200 Subject: [PATCH 237/613] Explicitly specify default radius for check_gradient --- chess/svg.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/svg.py b/chess/svg.py index 177ffe02b..9ddf044d8 100644 --- a/chess/svg.py +++ b/chess/svg.py @@ -68,7 +68,7 @@ XX = """""" # noqa: E501 -CHECK_GRADIENT = """""" # noqa: E501 +CHECK_GRADIENT = """""" # noqa: E501 DEFAULT_COLORS = { "square light": "#ffce9e", From a4bec19d905eee26e58acc549320f197fb76146b Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 12 Jul 2021 22:14:31 +0200 Subject: [PATCH 238/613] Mention spin and combo option types (fixes #796) --- chess/engine.py | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/chess/engine.py b/chess/engine.py index af4b12012..ec1e049a6 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -232,6 +232,10 @@ class Option: +========+=====+======+================================================+ | check | X | X | ``True`` or ``False`` | +--------+-----+------+------------------------------------------------+ + | spin | X | X | integer, between *min* and *max* | + +--------+-----+------+------------------------------------------------+ + | combo | X | X | string, one of *var* | + +--------+-----+------+------------------------------------------------+ | button | X | X | ``None`` | +--------+-----+------+------------------------------------------------+ | reset | | X | ``None`` | From 4c0c2929a3f2b580b5bfa277cc05ed2879c2ac1b Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 13 Jul 2021 10:14:57 +0200 Subject: [PATCH 239/613] Fix 'Duplicate explicit target name: "xboard protocol"' --- chess/engine.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/engine.py b/chess/engine.py index ec1e049a6..390190035 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1899,7 +1899,7 @@ def __repr__(self) -> str: class XBoardProtocol(Protocol): """ An implementation of the - `XBoard protocol `_ (CECP). + `XBoard protocol `__ (CECP). """ def __init__(self) -> None: From 3770f2500f7a71128e4f7af4eedffd7e3be19855 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 13 Jul 2021 10:22:16 +0200 Subject: [PATCH 240/613] Again try to update Sphinx on RTD --- .readthedocs.yml | 2 +- docs/conf.py | 11 ----------- docs/requirements.txt | 2 +- 3 files changed, 2 insertions(+), 13 deletions(-) diff --git a/.readthedocs.yml b/.readthedocs.yml index 11760dd7d..e6efe594c 100644 --- a/.readthedocs.yml +++ b/.readthedocs.yml @@ -1,6 +1,6 @@ version: 1 python: - version: 3.8 + version: 3.9 install: - requirements: docs/requirements.txt - method: setuptools diff --git a/docs/conf.py b/docs/conf.py index e3fe4f737..526150026 100644 --- a/docs/conf.py +++ b/docs/conf.py @@ -1,6 +1,5 @@ import sys import os -import typing # Do not resolve these. autodoc_type_aliases = { @@ -11,16 +10,6 @@ "IntoSquareSet": "chess.IntoSquareSet", } -# Hack to not resolve autodoc_type_aliases before Sphinx 3.3. -# See https://github.com/sphinx-doc/sphinx/issues/6518. -_get_type_hints = typing.get_type_hints -def get_type_hints(obj, globalns=None, localns=None): - if localns is None: - localns = {} - localns.update(autodoc_type_aliases) - return _get_type_hints(obj, globalns, localns) -typing.get_type_hints = get_type_hints - # Import the chess module. sys.path.insert(0, os.path.abspath("..")) import chess diff --git a/docs/requirements.txt b/docs/requirements.txt index 89eb0be0b..b0315fc3d 100644 --- a/docs/requirements.txt +++ b/docs/requirements.txt @@ -1 +1 @@ -sphinx==3.2.1 +Sphinx==4.1.0 From d45c02aade45cc788b14195722e2926f7d69e623 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 13 Jul 2021 10:24:39 +0200 Subject: [PATCH 241/613] Downgrade Python for RTD --- .readthedocs.yml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/.readthedocs.yml b/.readthedocs.yml index e6efe594c..11760dd7d 100644 --- a/.readthedocs.yml +++ b/.readthedocs.yml @@ -1,6 +1,6 @@ version: 1 python: - version: 3.9 + version: 3.8 install: - requirements: docs/requirements.txt - method: setuptools From 57eecae5d69e8d295021b0a9555ee861fe5b2df7 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 13 Jul 2021 10:32:30 +0200 Subject: [PATCH 242/613] Downgrade Sphinx for RTD --- docs/requirements.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/requirements.txt b/docs/requirements.txt index b0315fc3d..5152367fe 100644 --- a/docs/requirements.txt +++ b/docs/requirements.txt @@ -1 +1 @@ -Sphinx==4.1.0 +Sphinx==3.5.4 From 17e5c8d84c0ce8c22a150849d0f98d24806a1c58 Mon Sep 17 00:00:00 2001 From: "Devin J. Pohly" Date: Fri, 23 Jul 2021 16:35:23 -0500 Subject: [PATCH 243/613] read_game: don't pop/end_variation while skipping If the Visitor class enters a variation without skipping, then returns SKIP for a variation nested inside it, the traversal state is messed up when the inside variation ends. If our skip depth is anything greater than zero when we reach a ')' token, we should not visit the end of a variation or pop the board_stack, because it is being skipped completely. Short testcase: import chess, chess.pgn as pgn, io class MainlineW(pgn.GameBuilder): """Includes variations played by Black but not by White""" def begin_variation(self): if self.variation_stack[-1].turn() != chess.WHITE: return pgn.SKIP return super().begin_variation() g = pgn.read_game(io.StringIO( '1. e4 e5 (1... d5 2.exd5 Qxd5 3. Nc3 (3. c4) 3... Qa5)'), Visitor=MainlineW) --- chess/pgn.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/pgn.py b/chess/pgn.py index d4e4c1316..17adeb04e 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -1599,7 +1599,7 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any: elif token == ")": if skip_variation_depth: skip_variation_depth -= 1 - if len(board_stack) > 1: + elif len(board_stack) > 1: visitor.end_variation() board_stack.pop() elif skip_variation_depth: From d8632559d88c554ab7b8769c3c124aa9c5a88cfb Mon Sep 17 00:00:00 2001 From: analog-hors <44050761+analog-hors@users.noreply.github.com> Date: Sat, 24 Jul 2021 23:24:07 +1000 Subject: [PATCH 244/613] Fix bratko_kopec movetime description --- examples/bratko_kopec/bratko_kopec.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/examples/bratko_kopec/bratko_kopec.py b/examples/bratko_kopec/bratko_kopec.py index 2c50ddfce..8e5210b70 100755 --- a/examples/bratko_kopec/bratko_kopec.py +++ b/examples/bratko_kopec/bratko_kopec.py @@ -104,7 +104,7 @@ async def main() -> None: parser.add_argument("-t", "--threads", default=1, type=int, help="Threads for use by the UCI engine.") parser.add_argument("-m", "--movetime", default=1.0, type=float, - help="Time to move in milliseconds.") + help="Time to move in seconds.") parser.add_argument("-s", "--simple", dest="test_epd", action="store_const", default=test_epd_with_fractional_scores, const=test_epd, From 543a4f5d5e8cce37f183ab98677c6ef0a2e7cfd5 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 13 Sep 2021 11:03:32 +0200 Subject: [PATCH 245/613] Make Syzygy documentation more precise --- chess/syzygy.py | 33 +++++++++++++++++++++------------ docs/syzygy.rst | 6 +++--- 2 files changed, 24 insertions(+), 15 deletions(-) diff --git a/chess/syzygy.py b/chess/syzygy.py index 8fe3df6a1..ef453b71f 100644 --- a/chess/syzygy.py +++ b/chess/syzygy.py @@ -1675,7 +1675,9 @@ def sprobe_capts(self, board: chess.Board, alpha: int, beta: int) -> Tuple[int, def probe_wdl(self, board: chess.Board) -> int: """ - Probes WDL tables for win/draw/loss-information. + Probes WDL tables for win/draw/loss-information under the 50-move rule, + assuming the position has been reached directly after a capture or + pawn move. Probing is thread-safe when done with different *board* objects and if *board* objects are not modified during probing. @@ -1836,12 +1838,18 @@ def probe_dtz_no_ep(self, board: chess.Board) -> int: def probe_dtz(self, board: chess.Board) -> int: """ - Probes DTZ tables for distance to zero information. + Probes DTZ tables for + `DTZ50'' information with rounding `_. - Both DTZ and WDL tables are required in order to probe for DTZ. + Minmaxing the DTZ50'' values guarantees winning a won position + (and drawing a drawn position), because it makes progress keeping the + win in hand. + However the lines are not always the most straightforward ways to win. + Engines like Stockfish calculate themselves, checking with DTZ, but + only play according to DTZ if they can not manage on their own. Returns a positive value if the side to move is winning, ``0`` if the - position is a draw and a negative value if the side to move is losing. + position is a draw, and a negative value if the side to move is losing. More precisely: +-----+------------------+--------------------------------------------+ @@ -1871,15 +1879,14 @@ def probe_dtz(self, board: chess.Board) -> int: The return value can be off by one: a return value -n can mean a losing zeroing move in in n + 1 plies and a return value +n can mean a winning zeroing move in n + 1 plies. - This is guaranteed not to happen for positions exactly on the edge of - the 50-move rule, so that (with some care) this never impacts the - result of practical play. + This implies some primary tablebase lines may waste up to 1 ply. + Rounding is never used for endgame phases where it would change the + game theoretical outcome. - Minmaxing the DTZ values guarantees winning a won position (and drawing - a drawn position), because it makes progress keeping the win in hand. - However the lines are not always the most straightforward ways to win. - Engines like Stockfish calculate themselves, checking with DTZ, but - only play according to DTZ if they can not manage on their own. + This means users need to be careful in positions that are nearly drawn + under the 50-move rule! Carelessly wasting 1 more ply by not following + the tablebase recommendation, for a total of 2 wasted plies, may + change the outcome of the game. >>> import chess >>> import chess.syzygy @@ -1893,6 +1900,8 @@ def probe_dtz(self, board: chess.Board) -> int: Probing is thread-safe when done with different *board* objects and if *board* objects are not modified during probing. + Both DTZ and WDL tables are required in order to probe for DTZ. + :raises: :exc:`KeyError` (or specifically :exc:`chess.syzygy.MissingTableError`) if the position could not be found in the tablebase. Use diff --git a/docs/syzygy.rst b/docs/syzygy.rst index e168db5e7..d2ce4edb6 100644 --- a/docs/syzygy.rst +++ b/docs/syzygy.rst @@ -1,9 +1,9 @@ Syzygy endgame tablebase probing ================================ -Syzygy tablebases provide **WDL** (win/draw/loss) and **DTZ** (distance to -zero) information for all endgame positions with up to 7 pieces. -Positions with castling rights are not included. +Syzygy tablebases provide WDL\ :sub:`50` (win/draw/loss under the 50-move rule) and +DTZ\ :sub:`50`'' (distance to zeroing) information with rounding for all endgame +positions with up to 7 pieces. Positions with castling rights are not included. .. warning:: Ensure tablebase files match the known checksums. Maliciously crafted From 44cf0d0703d9ee1067dadf204865d15fd418e09e Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 14 Sep 2021 22:29:56 +0200 Subject: [PATCH 246/613] Fix typos --- chess/syzygy.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/chess/syzygy.py b/chess/syzygy.py index ef453b71f..65cafbeeb 100644 --- a/chess/syzygy.py +++ b/chess/syzygy.py @@ -1675,7 +1675,7 @@ def sprobe_capts(self, board: chess.Board, alpha: int, beta: int) -> Tuple[int, def probe_wdl(self, board: chess.Board) -> int: """ - Probes WDL tables for win/draw/loss-information under the 50-move rule, + Probes WDL tables for win/draw/loss information under the 50-move rule, assuming the position has been reached directly after a capture or pawn move. @@ -1844,7 +1844,7 @@ def probe_dtz(self, board: chess.Board) -> int: Minmaxing the DTZ50'' values guarantees winning a won position (and drawing a drawn position), because it makes progress keeping the win in hand. - However the lines are not always the most straightforward ways to win. + However, the lines are not always the most straightforward ways to win. Engines like Stockfish calculate themselves, checking with DTZ, but only play according to DTZ if they can not manage on their own. From 809cbd4861e9abab99c893855de850641fb5a185 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 16 Sep 2021 21:06:55 +0200 Subject: [PATCH 247/613] Comma --- chess/syzygy.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/chess/syzygy.py b/chess/syzygy.py index 65cafbeeb..b818f1a8c 100644 --- a/chess/syzygy.py +++ b/chess/syzygy.py @@ -1535,8 +1535,8 @@ def add_directory(self, directory: str, *, load_wdl: bool = True, load_dtz: bool """ Adds tables from a directory. - By default all available tables with the correct file names - (e.g. WDL files like ``KQvKN.rtbw`` and DTZ files like ``KRBvK.rtbz``) + By default, all available tables with the correct file names + (e.g., WDL files like ``KQvKN.rtbw`` and DTZ files like ``KRBvK.rtbz``) are added. The relevant files are lazily opened when the tablebase is actually From fb26c08c7c13fe2665b449fdfb10c5e882338ac9 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 17 Sep 2021 00:11:58 +0200 Subject: [PATCH 248/613] Remove leftovers of old CI --- setup.py | 10 ---------- test.py | 1 - 2 files changed, 11 deletions(-) diff --git a/setup.py b/setup.py index 1bf8a4b7d..cbaa70e3e 100755 --- a/setup.py +++ b/setup.py @@ -58,16 +58,6 @@ def read_description(): "//readthedocs.org/projects/python-chess/badge/?version=latest", "//readthedocs.org/projects/python-chess/badge/?version=v{}".format(chess.__version__)) - # Show Travis CI build status of the concrete version. - description = description.replace( - "//travis-ci.org/niklasf/python-chess.svg?branch=master", - "//travis-ci.org/niklasf/python-chess.svg?branch=v{}".format(chess.__version__)) - - # Show Appveyor build status of the concrete version. - description = description.replace( - "/y9k3hdbm0f0nbum9/branch/master", - "/y9k3hdbm0f0nbum9/branch/v{}".format(chess.__version__)) - # Remove doctest comments. description = re.sub(r"\s*# doctest:.*", "", description) diff --git a/test.py b/test.py index 4051a8384..1214f1dc7 100755 --- a/test.py +++ b/test.py @@ -3777,7 +3777,6 @@ def test_suicide_dtz(self): dtz = tables.probe_dtz(board) self.assertEqual(dtz, solution["dtz"], f"Expecting dtz {solution['dtz']}, got {dtz} (in {epd})") - @unittest.skipIf(os.environ.get("TRAVIS_PYTHON_VERSION", "").startswith("pypy"), "travis pypy is very slow") @catchAndSkip(chess.syzygy.MissingTableError) def test_suicide_stats(self): board = chess.variant.SuicideBoard() From 7f7e1cb0d719064f312aea7eeda5655df3ee33e0 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Sat, 2 Oct 2021 21:15:24 +0200 Subject: [PATCH 249/613] Document chess.pgn.Game.from_board() (for #811) --- docs/pgn.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/pgn.rst b/docs/pgn.rst index 12b09ac62..9ebe96594 100644 --- a/docs/pgn.rst +++ b/docs/pgn.rst @@ -52,7 +52,7 @@ Both extend :class:`~chess.pgn.GameNode`. :members: .. autoclass:: chess.pgn.Game - :members: headers, errors, setup, accept + :members: headers, errors, setup, accept, from_board, without_tag_roster .. autoclass:: chess.pgn.ChildNode :members: parent, move, starting_comment, nags, san, uci, end From 8ac79bc34e0bfaf2f03e9ecbc1668e2f33fc3bcb Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 7 Oct 2021 16:53:11 +0200 Subject: [PATCH 250/613] Use Windows paths in one engine example For https://github.com/niklasf/python-chess/discussions/809. --- docs/engine.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/engine.rst b/docs/engine.rst index 2a8a2a4c7..c83d625a8 100644 --- a/docs/engine.rst +++ b/docs/engine.rst @@ -30,7 +30,7 @@ Example: Let Stockfish play against itself, 100 milliseconds per move. import chess import chess.engine - engine = chess.engine.SimpleEngine.popen_uci("/usr/bin/stockfish") + engine = chess.engine.SimpleEngine.popen_uci(r"C:\Users\xxxxx\Download\stockfish_14_win_x64\stockfish_14_win_x64_avx2.exe") board = chess.Board() while not board.is_game_over(): @@ -46,7 +46,7 @@ Example: Let Stockfish play against itself, 100 milliseconds per move. import chess.engine async def main() -> None: - transport, engine = await chess.engine.popen_uci("/usr/bin/stockfish") + transport, engine = await chess.engine.popen_uci(r"C:\Users\xxxxx\Download\stockfish_14_win_x64\stockfish_14_win_x64_avx2.exe") board = chess.Board() while not board.is_game_over(): From 72ed47eed95e006ca68229f6db736a688015d639 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 7 Oct 2021 17:03:15 +0200 Subject: [PATCH 251/613] Download -> Downloads in Windows example --- docs/engine.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/engine.rst b/docs/engine.rst index c83d625a8..979d0e915 100644 --- a/docs/engine.rst +++ b/docs/engine.rst @@ -30,7 +30,7 @@ Example: Let Stockfish play against itself, 100 milliseconds per move. import chess import chess.engine - engine = chess.engine.SimpleEngine.popen_uci(r"C:\Users\xxxxx\Download\stockfish_14_win_x64\stockfish_14_win_x64_avx2.exe") + engine = chess.engine.SimpleEngine.popen_uci(r"C:\Users\xxxxx\Downloads\stockfish_14_win_x64\stockfish_14_win_x64_avx2.exe") board = chess.Board() while not board.is_game_over(): @@ -46,7 +46,7 @@ Example: Let Stockfish play against itself, 100 milliseconds per move. import chess.engine async def main() -> None: - transport, engine = await chess.engine.popen_uci(r"C:\Users\xxxxx\Download\stockfish_14_win_x64\stockfish_14_win_x64_avx2.exe") + transport, engine = await chess.engine.popen_uci(r"C:\Users\xxxxx\Downloads\stockfish_14_win_x64\stockfish_14_win_x64_avx2.exe") board = chess.Board() while not board.is_game_over(): From e5539039ee9d9e101de9064c9f062aad3c9f0725 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 7 Oct 2021 18:07:24 +0200 Subject: [PATCH 252/613] Remove contempt from test for Stockfish 14 compat --- test.py | 2 -- 1 file changed, 2 deletions(-) diff --git a/test.py b/test.py index 1214f1dc7..4a3f41d34 100755 --- a/test.py +++ b/test.py @@ -2874,8 +2874,6 @@ def test_wdl_model(self): @catchAndSkip(FileNotFoundError, "need stockfish") def test_sf_forced_mates(self): with chess.engine.SimpleEngine.popen_uci("stockfish", debug=True) as engine: - engine.configure({"Contempt": 23}) - epds = [ "1k1r4/pp1b1R2/3q2pp/4p3/2B5/4Q3/PPP2B2/2K5 b - - bm Qd1+; id \"BK.01\";", "6k1/N1p3pp/2p5/3n1P2/4K3/1P5P/P1Pr1r2/R1R5 b - - bm Rf4+; id \"Clausthal 2014\";", From 1aeba7be0f7c43552573159e3070949c8d222197 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 7 Oct 2021 18:50:59 +0200 Subject: [PATCH 253/613] Add failing test for skipping nested variation (#798) --- test.py | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/test.py b/test.py index 4a3f41d34..ff4b649ba 100755 --- a/test.py +++ b/test.py @@ -2776,6 +2776,24 @@ def test_node_turn(self): node = node.add_variation(chess.Move.from_uci("e1e2")) self.assertEqual(node.turn(), chess.BLACK) + def test_skip_inner_variation(self): + class BlackVariationsOnly(chess.pgn.GameBuilder): + def begin_variation(self): + self.skipping = self.variation_stack[-1].turn() != chess.WHITE + if self.skipping: + return chess.pgn.SKIP + else: + return super().begin_variation() + + def end_variation(self): + if self.skipping: + self.skipping = False + else: + return super().end_variation() + + game = chess.pgn.read_game(io.StringIO("1. e4 e5 (1... d5 2. exd5 Qxd5 3. Nc3 (3. c4) 3... Qa5)"), Visitor=BlackVariationsOnly) + self.assertEqual(game.accept(chess.pgn.StringExporter(headers=False)), "1. e4 e5 ( 1... d5 2. exd5 Qxd5 3. Nc3 Qa5 ) *") + @unittest.skipIf(sys.platform == "win32" and (3, 8, 0) <= sys.version_info < (3, 8, 1), "https://bugs.python.org/issue34679") class EngineTestCase(unittest.TestCase): From bcce6ccad25a94ab61d69486f671192b9db9859c Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 7 Oct 2021 18:52:47 +0200 Subject: [PATCH 254/613] Call matching end_variation while skipping (#798) --- chess/pgn.py | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/chess/pgn.py b/chess/pgn.py index 17adeb04e..fccf9f216 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -1597,7 +1597,10 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any: board.pop() board_stack.append(board) elif token == ")": - if skip_variation_depth: + if skip_variation_depth == 1: + skip_variation_depth = 0 + visitor.end_variation() + elif skip_variation_depth: skip_variation_depth -= 1 elif len(board_stack) > 1: visitor.end_variation() From 5587a8c1a363b930c78601f5d263a83d9f8b0cb4 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 7 Oct 2021 19:03:11 +0200 Subject: [PATCH 255/613] Also test skipping nested variations with Game.accept() (#798) --- test.py | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/test.py b/test.py index ff4b649ba..1fcc13ec0 100755 --- a/test.py +++ b/test.py @@ -2791,8 +2791,16 @@ def end_variation(self): else: return super().end_variation() - game = chess.pgn.read_game(io.StringIO("1. e4 e5 (1... d5 2. exd5 Qxd5 3. Nc3 (3. c4) 3... Qa5)"), Visitor=BlackVariationsOnly) - self.assertEqual(game.accept(chess.pgn.StringExporter(headers=False)), "1. e4 e5 ( 1... d5 2. exd5 Qxd5 3. Nc3 Qa5 ) *") + pgn = "1. e4 e5 ( 1... d5 2. exd5 Qxd5 3. Nc3 ( 3. c4 ) 3... Qa5 ) *" + expected_pgn = "1. e4 e5 ( 1... d5 2. exd5 Qxd5 3. Nc3 Qa5 ) *" + + # Driven by parser. + game = chess.pgn.read_game(io.StringIO(pgn), Visitor=BlackVariationsOnly) + self.assertEqual(game.accept(chess.pgn.StringExporter(headers=False)), expected_pgn) + + # Driven by game tree traversal. + game = chess.pgn.read_game(io.StringIO(pgn)).accept(BlackVariationsOnly()) + self.assertEqual(game.accept(chess.pgn.StringExporter(headers=False)), expected_pgn) @unittest.skipIf(sys.platform == "win32" and (3, 8, 0) <= sys.version_info < (3, 8, 1), "https://bugs.python.org/issue34679") From 53a8a9e11f7401d4d689543f82b6c2b20f4c79e1 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 7 Oct 2021 19:14:05 +0200 Subject: [PATCH 256/613] Prepare 1.7.0 --- CHANGELOG.rst | 14 ++++++++++++++ chess/__init__.py | 2 +- 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 1e6f941dc..68e381d50 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,6 +1,20 @@ Changelog for python-chess ========================== +New in v1.7.0 +------------- + +New features: + +* Added new models for ``chess.engine.Score.wdl()``: ``sf`` (the new default) + and ``sf14``. +* Added ``chess.Board.piece_map()``. + +Bugfixes: + +* ``chess.pgn``: Fix skipping with nested variations. +* ``chess.svg``: Make check gradient compatible with QtSvg. + New in v1.6.1 ------------- diff --git a/chess/__init__.py b/chess/__init__.py index 25ca18344..50c1a8e2a 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -27,7 +27,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.6.1" +__version__ = "1.7.0" import collections import copy From 52dbcf05930e7580c3c489e71e7f51d74646eb28 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 7 Oct 2021 22:26:26 +0200 Subject: [PATCH 257/613] Add shallow perft tests for impossible alignment --- examples/perft/tricky.perft | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/examples/perft/tricky.perft b/examples/perft/tricky.perft index e46e9366d..f0e9d78c5 100644 --- a/examples/perft/tricky.perft +++ b/examples/perft/tricky.perft @@ -95,3 +95,31 @@ perft 1 7 perft 2 52 perft 3 4593 perft 4 50268 + +# +# Impossible checker alignment. +# + +id align-diag-1 +epd 3R4/8/q4k2/2B5/1NK5/3b4/8/8 w - - +perft 1 4 +perft 2 125 +perft 3 2854 + +id align-diag-2 +epd 2Nq4/2K5/1b6/8/7R/3k4/7P/8 w - - +perft 1 3 +perft 2 81 +perft 3 1217 + +id align-horizontal +epd 5R2/2P5/8/4k3/8/3rK2r/8/8 w - - +perft 1 2 +perft 2 56 +perft 3 1030 + +id align-ep +epd 8/8/8/1k6/3Pp3/8/8/4KQ2 b - d3 +perft 1 6 +perft 2 121 +perft 3 711 From eb7710296a23908f176b02f42f978e27fda97825 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Tue, 19 Oct 2021 12:45:39 +0200 Subject: [PATCH 258/613] Test atomic position with exploded king --- test.py | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/test.py b/test.py index 1fcc13ec0..0c2c3f86b 100755 --- a/test.py +++ b/test.py @@ -4127,6 +4127,11 @@ def test_atomic960(self): self.assertEqual(game.end().parent.board().fen(), "rkr1b1n1/1pp2p2/4n1p1/p2pp2p/3P3P/Q1P3P1/PP2PP2/RK3N2 w Qkq - 0 10") self.assertEqual(game.end().board().fen(), "rkr1b1n1/1pp2p2/4n1p1/p2pp2p/3P3P/Q1P3P1/PP2PP2/2KR1N2 b kq - 1 10") + def test_atomic_king_exploded(self): + board = chess.variant.AtomicBoard("rn5r/pp4pp/2p3Nn/5p2/1b2P1PP/8/PPP2P2/R1B1KB1R b KQ - 0 9") + self.assertEqual(board.outcome().winner, chess.WHITE) + self.assertEqual(board.status(), chess.STATUS_VALID) + class RacingKingsTestCase(unittest.TestCase): From 634a7519c53485b66d3ed0f1b6546dd5a5176105 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 27 Oct 2021 12:03:35 +0200 Subject: [PATCH 259/613] add 3check perft --- .github/workflows/test.yml | 1 + examples/perft/3check.perft | 5 +++++ 2 files changed, 6 insertions(+) create mode 100644 examples/perft/3check.perft diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index 21aac88f3..8353a4c9c 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -33,6 +33,7 @@ jobs: - run: python examples/perft/perft.py -t 1 --variant racingkings examples/perft/racingkings.perft - run: python examples/perft/perft.py -t 1 --variant horde examples/perft/horde.perft - run: python examples/perft/perft.py -t 1 --variant crazyhouse examples/perft/crazyhouse.perft + - run: python examples/perft/perft.py -t 1 --variant 3check examples/perft/3check.perft mypy: strategy: matrix: diff --git a/examples/perft/3check.perft b/examples/perft/3check.perft new file mode 100644 index 000000000..7a111de78 --- /dev/null +++ b/examples/perft/3check.perft @@ -0,0 +1,5 @@ +id 3check-kiwipete +epd r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq - 1+1 +perft 1 48 +perft 2 2039 +perft 3 97848 From 0f534ea8f0b5b9e927a878041510696a57be17b9 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 27 Oct 2021 12:20:42 +0200 Subject: [PATCH 260/613] Also test 3check for castling gives check --- examples/perft/3check.perft | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/examples/perft/3check.perft b/examples/perft/3check.perft index 7a111de78..291a67865 100644 --- a/examples/perft/3check.perft +++ b/examples/perft/3check.perft @@ -3,3 +3,9 @@ epd r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq - 1+1 perft 1 48 perft 2 2039 perft 3 97848 + +id 3check-castling +epd r3k2r/8/8/8/8/8/8/R3K2R w KQkq - 1+1 +perft 1 26 +perft 2 562 +perft 3 13410 From a53d68d0937f554e5cf4249075d6d2360f32d4ba Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 1 Nov 2021 15:27:01 +0100 Subject: [PATCH 261/613] Add "3 check" as variant alias --- chess/variant.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chess/variant.py b/chess/variant.py index 9580d723b..82f841648 100644 --- a/chess/variant.py +++ b/chess/variant.py @@ -694,7 +694,7 @@ def restore(self, board: ThreeCheckBoardT) -> None: class ThreeCheckBoard(chess.Board): - aliases = ["Three-check", "Three check", "Threecheck", "Three check chess", "3-check", "3check"] + aliases = ["Three-check", "Three check", "Threecheck", "Three check chess", "3-check", "3 check", "3check"] uci_variant = "3check" xboard_variant = "3check" starting_fen = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 3+3 0 1" From 3609397dff7983a33aaf6b5a8aec3d5f7d554b10 Mon Sep 17 00:00:00 2001 From: Markus Elfring Date: Mon, 1 Nov 2021 19:54:24 +0100 Subject: [PATCH 262/613] Issue #815: Convert eleven statements to the usage of augmented assignments Augmented assignment statements became available with Python 2. https://docs.python.org/3/whatsnew/2.0.html#augmented-assignment Thus improve eleven source code places accordingly. Signed-off-by: Markus Elfring --- chess/__init__.py | 16 ++++++++-------- chess/gaviota.py | 6 +++--- 2 files changed, 11 insertions(+), 11 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index 50c1a8e2a..b4ecffa36 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -303,19 +303,19 @@ def flip_diagonal(bb: Bitboard) -> Bitboard: t = (bb ^ (bb << 28)) & 0x0f0f_0f0f_0000_0000 bb = bb ^ (t ^ (t >> 28)) t = (bb ^ (bb << 14)) & 0x3333_0000_3333_0000 - bb = bb ^ (t ^ (t >> 14)) + bb ^= t ^ (t >> 14) t = (bb ^ (bb << 7)) & 0x5500_5500_5500_5500 - bb = bb ^ (t ^ (t >> 7)) + bb ^= t ^ (t >> 7) return bb def flip_anti_diagonal(bb: Bitboard) -> Bitboard: # https://www.chessprogramming.org/Flipping_Mirroring_and_Rotating#FlipabouttheAntidiagonal t = bb ^ (bb << 36) - bb = bb ^ ((t ^ (bb >> 36)) & 0xf0f0_f0f0_0f0f_0f0f) + bb ^= (t ^ (bb >> 36)) & 0xf0f0_f0f0_0f0f_0f0f t = (bb ^ (bb << 18)) & 0xcccc_0000_cccc_0000 - bb = bb ^ (t ^ (t >> 18)) + bb ^= t ^ (t >> 18) t = (bb ^ (bb << 9)) & 0xaa00_aa00_aa00_aa00 - bb = bb ^ (t ^ (t >> 9)) + bb ^= t ^ (t >> 9) return bb @@ -3230,7 +3230,7 @@ def has_kingside_castling_rights(self, color: Color) -> bool: if rook > king_mask: return True - castling_rights = castling_rights & (castling_rights - 1) + castling_rights &= castling_rights - 1 return False @@ -3251,7 +3251,7 @@ def has_queenside_castling_rights(self, color: Color) -> bool: if rook < king_mask: return True - castling_rights = castling_rights & (castling_rights - 1) + castling_rights &= castling_rights - 1 return False @@ -3527,7 +3527,7 @@ def generate_castling_moves(self, from_mask: Bitboard = BB_ALL, to_mask: Bitboar backrank = BB_RANK_1 if self.turn == WHITE else BB_RANK_8 king = self.occupied_co[self.turn] & self.kings & ~self.promoted & backrank & from_mask - king = king & -king + king &= -king if not king: return diff --git a/chess/gaviota.py b/chess/gaviota.py index 360cc7120..454949795 100644 --- a/chess/gaviota.py +++ b/chess/gaviota.py @@ -102,7 +102,7 @@ def map24_b(s: int) -> int: - s = s - 8 + s -= 8 return ((s & 3) + s) >> 1 def map88(x: int) -> int: @@ -219,7 +219,7 @@ def init_ppp48_idx() -> Tuple[List[List[List[int]]], List[int], List[int], List[ ppp48_sq_x[idx] = i ppp48_sq_y[idx] = j ppp48_sq_z[idx] = k - idx = idx + 1 + idx += 1 return ppp48_idx, ppp48_sq_x, ppp48_sq_y, ppp48_sq_z @@ -253,7 +253,7 @@ def init_aaa() -> Tuple[List[int], List[List[int]]]: accum = 0 aaa_base = [0] * 64 for a in range(64 - 1): - accum = accum + comb[a] + accum += comb[a] aaa_base[a + 1] = accum # Get aaa_xyz. From 9dd2e76ac31d327225fa003a8a216beb6cc1e858 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 3 Nov 2021 14:39:18 +0100 Subject: [PATCH 263/613] Revert some of 3609397dff798 for ducktyping --- chess/__init__.py | 12 ++++++------ test.py | 7 +++++++ 2 files changed, 13 insertions(+), 6 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index b4ecffa36..35903383e 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -301,21 +301,21 @@ def flip_horizontal(bb: Bitboard) -> Bitboard: def flip_diagonal(bb: Bitboard) -> Bitboard: # https://www.chessprogramming.org/Flipping_Mirroring_and_Rotating#FlipabouttheDiagonal t = (bb ^ (bb << 28)) & 0x0f0f_0f0f_0000_0000 - bb = bb ^ (t ^ (t >> 28)) + bb = bb ^ t ^ (t >> 28) t = (bb ^ (bb << 14)) & 0x3333_0000_3333_0000 - bb ^= t ^ (t >> 14) + bb = bb ^ t ^ (t >> 14) t = (bb ^ (bb << 7)) & 0x5500_5500_5500_5500 - bb ^= t ^ (t >> 7) + bb = bb ^ t ^ (t >> 7) return bb def flip_anti_diagonal(bb: Bitboard) -> Bitboard: # https://www.chessprogramming.org/Flipping_Mirroring_and_Rotating#FlipabouttheAntidiagonal t = bb ^ (bb << 36) - bb ^= (t ^ (bb >> 36)) & 0xf0f0_f0f0_0f0f_0f0f + bb = bb ^ ((t ^ (bb >> 36)) & 0xf0f0_f0f0_0f0f_0f0f) t = (bb ^ (bb << 18)) & 0xcccc_0000_cccc_0000 - bb ^= t ^ (t >> 18) + bb = bb ^ t ^ (t >> 18) t = (bb ^ (bb << 9)) & 0xaa00_aa00_aa00_aa00 - bb ^= t ^ (t >> 9) + bb = bb ^ t ^ (t >> 9) return bb diff --git a/test.py b/test.py index 0c2c3f86b..4e3396fb3 100755 --- a/test.py +++ b/test.py @@ -1892,6 +1892,13 @@ def test_int_conversion(self): def test_tolist(self): self.assertEqual(chess.SquareSet(chess.BB_LIGHT_SQUARES).tolist().count(True), 32) + def test_flip_ducktyping(self): + bb = 0x1e22_2212_0e0a_1222 + squares = chess.SquareSet(bb) + for f in [chess.flip_vertical, chess.flip_horizontal, chess.flip_diagonal, chess.flip_anti_diagonal]: + self.assertEqual(int(f(squares)), f(bb)) + self.assertEqual(int(squares), bb) # Not mutated + class PolyglotTestCase(unittest.TestCase): From 9135f9392bd06dd78bdfd755630c359597cbf77c Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 3 Nov 2021 14:41:10 +0100 Subject: [PATCH 264/613] Increase depth in test_sf_analysis for Stockfish 14.1 --- test.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/test.py b/test.py index 4e3396fb3..e57d8f2cd 100755 --- a/test.py +++ b/test.py @@ -2930,7 +2930,7 @@ def test_sf_options(self): def test_sf_analysis(self): with chess.engine.SimpleEngine.popen_uci("stockfish", setpgrp=True, debug=True) as engine: board = chess.Board("8/6K1/1p1B1RB1/8/2Q5/2n1kP1N/3b4/4n3 w - - 0 1") - limit = chess.engine.Limit(depth=26) + limit = chess.engine.Limit(depth=28) analysis = engine.analysis(board, limit) with analysis: for info in iter(analysis.next, None): From 67a7e00ecd5bc64c8942a938222b28fb8265f4a8 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 8 Dec 2021 15:07:04 +0100 Subject: [PATCH 265/613] At least mention is_fifty_moves() (closes #824) --- chess/__init__.py | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index 35903383e..bfa4548db 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -2017,10 +2017,13 @@ def can_claim_fifty_moves(self) -> bool: """ Checks if the player to move can claim a draw by the fifty-move rule. - Draw by the fifty-move rule can be claimed once the clock of halfmoves - since the last capture or pawn move becomes equal or greater to 100, - or if there is a legal move that achieves this. Other means of ending - the game take precedence. + :func:`~chess.Board.is_fifty_moves()` checks that the clock of + halfmoves since the last capture or pawn move is greater or equal + to 100, and that no other means of ending the game (like checkmate) + take precedence. + + In addition, the fifty-move rule can also be claimed if there is a + legal move that achieves this condition. """ if self.is_fifty_moves(): return True From 22b61f1e3bfa5b2c310a9b471b004c1b3fe18704 Mon Sep 17 00:00:00 2001 From: Qing Date: Fri, 17 Dec 2021 22:22:29 +0100 Subject: [PATCH 266/613] support of emt (Elapsed Move Time) command in pgn comments --- chess/pgn.py | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/chess/pgn.py b/chess/pgn.py index fccf9f216..a7269c658 100644 --- a/chess/pgn.py +++ b/chess/pgn.py @@ -121,6 +121,7 @@ CLOCK_REGEX = re.compile(r"""\[%clk\s(\d+):(\d+):(\d+(?:\.\d*)?)\]""") +EMT_REGEX = re.compile(r"""\[%emt\s(\d+):(\d+):(\d+(?:\.\d*)?)\]""") EVAL_REGEX = re.compile(r""" \[%eval\s(?: @@ -515,6 +516,40 @@ def set_clock(self, seconds: Optional[float]) -> None: self.comment += " " self.comment += clk + def emt(self) -> Optional[float]: + """ + Parses the first valid ``[%emt ...]`` annotation in the comment of + this node, if any. + + Returns the player's elapsed move time use for the comment of this + move, in seconds. + """ + match = EMT_REGEX.search(self.comment) + if match is None: + return None + return int(match.group(1)) * 3600 + int(match.group(2)) * 60 + float(match.group(3)) + + def set_emt(self, seconds: Optional[float]) -> None: + """ + Replaces the first valid ``[%emt ...]`` annotation in the comment of + this node or adds a new one. + """ + emt = "" + if seconds is not None: + seconds = max(0, seconds) + hours = int(seconds // 3600) + minutes = int(seconds % 3600 // 60) + seconds = seconds % 3600 % 60 + seconds_part = f"{seconds:06.3f}".rstrip("0").rstrip(".") + emt = f"[%emt {hours:d}:{minutes:02d}:{seconds_part}]" + + self.comment, found = EMT_REGEX.subn(emt, self.comment, count=1) + + if not found and emt: + if self.comment and not self.comment.endswith(" "): + self.comment += " " + self.comment += emt + @abc.abstractmethod def accept(self, visitor: BaseVisitor[ResultT]) -> ResultT: """ From fd8f10c265af76ed39c0c27bad078562a6d83b8a Mon Sep 17 00:00:00 2001 From: aipv Date: Sun, 19 Dec 2021 17:38:10 +0100 Subject: [PATCH 267/613] test cases for emt commmand in pgn.py --- test.py | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/test.py b/test.py index e57d8f2cd..5adc44a64 100755 --- a/test.py +++ b/test.py @@ -2749,11 +2749,31 @@ def test_annotations(self): self.assertEqual(arrows[1].color, "red") self.assertEqual(arrows[2].color, "green") + self.assertTrue(game.emt() is None) + emt = 321 + game.set_emt(emt) + self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%eval #1,5] [%emt 0:05:21]") + self.assertEqual(game.emt(), emt) + + game.set_emt(None) game.set_clock(None) game.set_eval(None) game.set_arrows([]) self.assertEqual(game.comment, "foo [%bar] baz") + def test_float_emt(self): + game = chess.pgn.Game() + game.comment = "[%emt 0:00:01.234]" + self.assertEqual(game.emt(), 1.234) + + game.set_emt(6.54321) + self.assertEqual(game.comment, "[%emt 0:00:06.543]") + self.assertEqual(game.emt(), 6.543) + + game.set_emt(-70) + self.assertEqual(game.comment, "[%emt 0:00:00]") # Clamped + self.assertEqual(game.emt(), 0) + def test_float_clk(self): game = chess.pgn.Game() game.comment = "[%clk 0:00:01.234]" From 65bf7ff9a20b6d218016144ce9f77d940b8d8263 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Mon, 20 Dec 2021 11:12:56 +0100 Subject: [PATCH 268/613] Prefer time.perf_counter() for measurement in example --- examples/bratko_kopec/bratko_kopec.py | 1 - examples/perft/perft.py | 6 +++--- 2 files changed, 3 insertions(+), 4 deletions(-) diff --git a/examples/bratko_kopec/bratko_kopec.py b/examples/bratko_kopec/bratko_kopec.py index 8e5210b70..62e3655a6 100755 --- a/examples/bratko_kopec/bratko_kopec.py +++ b/examples/bratko_kopec/bratko_kopec.py @@ -3,7 +3,6 @@ """Run an EPD test suite with a UCI engine.""" import asyncio -import time import argparse import itertools import logging diff --git a/examples/perft/perft.py b/examples/perft/perft.py index ef815c620..2c70cd2ed 100755 --- a/examples/perft/perft.py +++ b/examples/perft/perft.py @@ -60,7 +60,7 @@ def main(perft_file: TextIO, VariantBoard: Type[chess.Board], perft_f: Callable[ board = VariantBoard(chess960=True) column = 0 total_nodes = 0 - start_time = time.time() + start_time = time.perf_counter() for line in perft_file: # Skip comments and empty lines. @@ -100,14 +100,14 @@ def main(perft_file: TextIO, VariantBoard: Type[chess.Board], perft_f: Callable[ if column >= 40: column = 0 - sys.stdout.write(f" nodes {total_nodes} nps {sdiv(total_nodes, time.time() - start_time):.0f}\n") + sys.stdout.write(f" nodes {total_nodes} nps {sdiv(total_nodes, time.perf_counter() - start_time):.0f}\n") else: print() print("Unknown command:", cmd, arg) sys.exit(2) if column: - sys.stdout.write(f" nodes {total_nodes} nps {sdiv(total_nodes, time.time() - start_time):.0f}\n") + sys.stdout.write(f" nodes {total_nodes} nps {sdiv(total_nodes, time.perf_counter() - start_time):.0f}\n") if __name__ == "__main__": From b5a9cb52489ca63981490e1fa8a73eccc6ef2f86 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Wed, 22 Dec 2021 23:19:03 +0100 Subject: [PATCH 269/613] Test and fix SquareSet.{issuperset,issubset}() (fixes #838) --- chess/__init__.py | 4 ++-- test.py | 40 +++++++++++++++++++++++----------------- 2 files changed, 25 insertions(+), 19 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index bfa4548db..c54f23997 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -3869,11 +3869,11 @@ def isdisjoint(self, other: IntoSquareSet) -> bool: def issubset(self, other: IntoSquareSet) -> bool: """Tests if this square set is a subset of another.""" - return not bool(~self & other) + return not bool(self & ~SquareSet(other)) def issuperset(self, other: IntoSquareSet) -> bool: """Tests if this square set is a superset of another.""" - return not bool(self & ~SquareSet(other)) + return not bool(~self & other) def union(self, other: IntoSquareSet) -> SquareSet: return self | other diff --git a/test.py b/test.py index 5adc44a64..0aac186fb 100755 --- a/test.py +++ b/test.py @@ -1796,24 +1796,30 @@ def test_arithmetic(self): self.assertEqual(bb, chess.BB_C1) def test_immutable_set_operations(self): - self.assertTrue(chess.SquareSet(chess.BB_RANK_1).isdisjoint(chess.BB_RANK_2)) - self.assertFalse(chess.SquareSet(chess.BB_RANK_2).isdisjoint(chess.BB_FILE_E)) - - self.assertFalse(chess.SquareSet(chess.BB_A1).issubset(chess.BB_RANK_1)) - self.assertTrue(chess.SquareSet(chess.BB_RANK_1).issubset(chess.BB_A1)) - - self.assertTrue(chess.SquareSet(chess.BB_A1).issuperset(chess.BB_RANK_1)) - self.assertFalse(chess.SquareSet(chess.BB_RANK_1).issuperset(chess.BB_A1)) - - self.assertEqual(chess.SquareSet(chess.BB_A1).union(chess.BB_FILE_A), chess.BB_FILE_A) - - self.assertEqual(chess.SquareSet(chess.BB_A1).intersection(chess.BB_A2), chess.BB_EMPTY) - - self.assertEqual(chess.SquareSet(chess.BB_A1).difference(chess.BB_A2), chess.BB_A1) - - self.assertEqual(chess.SquareSet(chess.BB_A1).symmetric_difference(chess.BB_A2), chess.BB_A1 | chess.BB_A2) + examples = [ + chess.BB_EMPTY, + chess.BB_A1, + chess.BB_A2, + chess.BB_RANK_1, + chess.BB_RANK_2, + chess.BB_FILE_A, + chess.BB_FILE_E, + ] - self.assertEqual(chess.SquareSet(chess.BB_C5).copy(), chess.BB_C5) + for a in examples: + self.assertEqual(chess.SquareSet(a).copy(), a) + + for a in examples: + a = chess.SquareSet(a) + for b in examples: + b = chess.SquareSet(b) + self.assertEqual(set(a).isdisjoint(set(b)), a.isdisjoint(b)) + self.assertEqual(set(a).issubset(set(b)), a.issubset(b)) + self.assertEqual(set(a).issuperset(set(b)), a.issuperset(b)) + self.assertEqual(set(a).union(set(b)), set(a.union(b))) + self.assertEqual(set(a).intersection(set(b)), set(a.intersection(b))) + self.assertEqual(set(a).difference(set(b)), set(a.difference(b))) + self.assertEqual(set(a).symmetric_difference(set(b)), set(a.symmetric_difference(b))) def test_mutable_set_operations(self): squares = chess.SquareSet(chess.BB_A1) From 29f7bb883c810f6fecb46766b48e85253e7b9d9a Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 23 Dec 2021 00:08:52 +0100 Subject: [PATCH 270/613] Fix typing of ChainMap iterators https://github.com/microsoft/pylance-release/issues/2097 --- chess/engine.py | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/chess/engine.py b/chess/engine.py index 390190035..7fdf7fed6 100644 --- a/chess/engine.py +++ b/chess/engine.py @@ -1435,7 +1435,7 @@ def line_received(self, engine: UciProtocol, line: str) -> None: return await self.communicate(UciPingCommand) def _changed_options(self, options: ConfigMapping) -> bool: - return any(value is None or value != self.config.get(name) for name, value in collections.ChainMap(options, self.target_config).items()) + return any(value is None or value != self.config.get(name) for name, value in _chain_config(options, self.target_config)) def _setoption(self, name: str, value: ConfigValue) -> None: try: @@ -1457,7 +1457,7 @@ def _setoption(self, name: str, value: ConfigValue) -> None: self.config[name] = value def _configure(self, options: ConfigMapping) -> None: - for name, value in collections.ChainMap(options, self.target_config).items(): + for name, value in _chain_config(options, self.target_config): if name.lower() in MANAGED_OPTIONS: raise EngineError("cannot set {} which is automatically managed".format(name)) self._setoption(name, value) @@ -1845,6 +1845,14 @@ def _parse_uci_bestmove(board: chess.Board, args: str) -> BestMove: return BestMove(move, ponder) +def _chain_config(a: ConfigMapping, b: ConfigMapping) -> Iterator[Tuple[str, ConfigValue]]: + for name, value in a.items(): + yield name, value + for name, value in b.items(): + if name not in a: + yield name, value + + class UciOptionMap(MutableMapping[str, T]): """Dictionary with case-insensitive keys.""" @@ -2348,7 +2356,7 @@ def _setoption(self, name: str, value: ConfigValue) -> None: self.send_line(f"option {name}={value}") def _configure(self, options: ConfigMapping) -> None: - for name, value in collections.ChainMap(options, self.target_config).items(): + for name, value in _chain_config(options, self.target_config): if name.lower() in MANAGED_OPTIONS: raise EngineError(f"cannot set {name} which is automatically managed") self._setoption(name, value) From 78a67fd79e7b770563bca4c2ca25b73a3625bc75 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 23 Dec 2021 00:11:54 +0100 Subject: [PATCH 271/613] 3.10.0-beta.1 -> 3.10 in GitHub workflows --- .github/workflows/test.yml | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml index 8353a4c9c..7f3d24e5c 100644 --- a/.github/workflows/test.yml +++ b/.github/workflows/test.yml @@ -7,7 +7,7 @@ jobs: strategy: matrix: os: [ubuntu-latest, windows-latest] - python-version: ["3.7", "3.8", "3.9", "3.10.0-beta.1"] + python-version: ["3.7", "3.8", "3.9", "3.10"] runs-on: ${{ matrix.os }} steps: - uses: actions/checkout@v2 @@ -37,7 +37,7 @@ jobs: mypy: strategy: matrix: - python-version: ["3.8", "3.9", "3.10.0-beta.1"] + python-version: ["3.8", "3.9", "3.10"] runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 @@ -51,7 +51,7 @@ jobs: readme: strategy: matrix: - python-version: ["3.10.0-beta.1"] + python-version: ["3.10"] runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 From 0e9ac77f4431b8b8e0c154c314d03505fc01310a Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 23 Dec 2021 00:29:24 +0100 Subject: [PATCH 272/613] Update Python version dependent output in doctest --- README.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.rst b/README.rst index 37506a259..f02d0e584 100644 --- a/README.rst +++ b/README.rst @@ -131,7 +131,7 @@ Features >>> board.is_insufficient_material() False >>> board.outcome() - Outcome(termination=Termination.CHECKMATE, winner=True) + Outcome(termination=, winner=True) * Detects repetitions. Has a half-move clock. From d93c0b237b33d0652197958cd4a1cdeb72b7f7a2 Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Thu, 23 Dec 2021 14:37:35 +0100 Subject: [PATCH 273/613] Prepare 1.8.0 --- CHANGELOG.rst | 12 ++++++++++++ chess/__init__.py | 2 +- 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.rst b/CHANGELOG.rst index 68e381d50..705421688 100644 --- a/CHANGELOG.rst +++ b/CHANGELOG.rst @@ -1,6 +1,18 @@ Changelog for python-chess ========================== +New in v1.8.0 +------------- + +Bugfixes: + +* Fix ``SquareSet.issuperset()`` and ``SquareSet.issubset()`` by swapping + their respective implementations. + +New features: + +* Read and write PGN comments like ``[%emt 0:05:21]``. + New in v1.7.0 ------------- diff --git a/chess/__init__.py b/chess/__init__.py index c54f23997..72baf64a4 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -27,7 +27,7 @@ __email__ = "niklas.fiekas@backscattering.de" -__version__ = "1.7.0" +__version__ = "1.8.0" import collections import copy From 2bbf0b55025b7f1275a27c936373ef20d318a3b8 Mon Sep 17 00:00:00 2001 From: Tim Gates Date: Fri, 24 Dec 2021 22:13:53 +1100 Subject: [PATCH 274/613] docs: Fix a few typos There are small typos in: - chess/__init__.py - chess/syzygy.py Fixes: - Should read `necessary` rather than `nescessary`. - Should read `occurred` rather than `occured`. --- chess/__init__.py | 4 ++-- chess/syzygy.py | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index 72baf64a4..b5fea88e0 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -2045,7 +2045,7 @@ def can_claim_threefold_repetition(self) -> bool: Checks if the player to move can claim a draw by threefold repetition. Draw by threefold repetition can be claimed if the position on the - board occured for the third time or if such a repetition is reached + board occurred for the third time or if such a repetition is reached with one of the possible legal moves. Note that checking this can be slow: In the worst case @@ -2070,7 +2070,7 @@ def can_claim_threefold_repetition(self) -> bool: while switchyard: self.push(switchyard.pop()) - # Threefold repetition occured. + # Threefold repetition occurred. if transpositions[transposition_key] >= 3: return True diff --git a/chess/syzygy.py b/chess/syzygy.py index b818f1a8c..3b477e769 100644 --- a/chess/syzygy.py +++ b/chess/syzygy.py @@ -1495,7 +1495,7 @@ class Tablebase: If *max_fds* is not ``None``, will at most use *max_fds* open file descriptors at any given time. The least recently used tables are closed, - if nescessary. + if necessary. """ def __init__(self, *, max_fds: Optional[int] = 128, VariantBoard: Type[chess.Board] = chess.Board) -> None: self.variant = VariantBoard From d0f48c6f333c5132bc351317ca513d82a497990b Mon Sep 17 00:00:00 2001 From: Philipp Fruck Date: Sun, 16 Jan 2022 19:30:15 +0100 Subject: [PATCH 275/613] update missing documentation for `is_fifty_moves()` Co-authored-by: Anton Plagemann <54081139+antonplagemann@users.noreply.github.com> Co-authored-by: Pius Walter --- chess/__init__.py | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/chess/__init__.py b/chess/__init__.py index b5fea88e0..4d58d6e32 100644 --- a/chess/__init__.py +++ b/chess/__init__.py @@ -2011,19 +2011,20 @@ def can_claim_draw(self) -> bool: return self.can_claim_fifty_moves() or self.can_claim_threefold_repetition() def is_fifty_moves(self) -> bool: + """ + Checks that the clock of halfmoves since the last capture or pawn move + is greater or equal to 100, and that no other means of ending the game + (like checkmate) take precedence. + """ return self._is_halfmoves(100) def can_claim_fifty_moves(self) -> bool: """ Checks if the player to move can claim a draw by the fifty-move rule. - :func:`~chess.Board.is_fifty_moves()` checks that the clock of - halfmoves since the last capture or pawn move is greater or equal - to 100, and that no other means of ending the game (like checkmate) - take precedence. - - In addition, the fifty-move rule can also be claimed if there is a - legal move that achieves this condition. + In addition to :func:`~chess.Board.is_fifty_moves()`, the fifty-move + rule can also be claimed if there is a legal move that achieves this + condition. """ if self.is_fifty_moves(): return True From 457f5f4d32b8eacb9ababfa4608925a3129a372e Mon Sep 17 00:00:00 2001 From: Niklas Fiekas Date: Fri, 28 Jan 2022 10:23:37 +0100 Subject: [PATCH 276/613] Try CodeQL --- .github/workflows/codeql.yml | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 .github/workflows/codeql.yml diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml new file mode 100644 index 000000000..31a63b204 --- /dev/null +++ b/.github/workflows/codeql.yml @@ -0,0 +1,18 @@ +name: CodeQL + +on: [push, pull_request] + +jobs: + analyze: + name: Analyze + runs-on: ubuntu-latest + permissions: + actions: read + contents: read + security-events: write + steps: + - uses: actions/checkout@v2 + - uses: github/codeql-action/init@v1 + with: + languages: python + - uses: github/codeql-action/analyze@v1 From 3c3fa25caacc1dd82e03ad6ebedf5e98c860c862 Mon Sep 17 00:00:00 2001 From: David Sterba Date: Fri, 28 Jan 2022 14:11:39 +0100 Subject: [PATCH 277/613] Add ascii board as description of svg The tag in SVG can store a textual description, eg. for better accessibility. For the chess board there could be the string representation (basically str(chess.Board()) and enclosed in 

 it is
readable in text browsers like links or w3m when the svg is embedded in
html.
---
 chess/svg.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/chess/svg.py b/chess/svg.py
index 9ddf044d8..4f10c5789 100644
--- a/chess/svg.py
+++ b/chess/svg.py
@@ -286,6 +286,11 @@ def board(board: Optional[chess.BaseBoard] = None, *,
     if style:
         ET.SubElement(svg, "style").text = style
 
+    if board:
+        desc = ET.SubElement(svg, "desc")
+        asciiboard = ET.SubElement(desc, "pre")
+        asciiboard.text = str(board)
+
     defs = ET.SubElement(svg, "defs")
     if board:
         for piece_color in chess.COLORS:

From dd759f21230e280a78a0c2c15d6321e74b651476 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 6 Feb 2022 10:08:11 +0100
Subject: [PATCH 278/613] Add another impossible en passant perft
 (niklasf/shakmaty#53)

---
 examples/perft/tricky.perft | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/examples/perft/tricky.perft b/examples/perft/tricky.perft
index f0e9d78c5..b3cca9fd2 100644
--- a/examples/perft/tricky.perft
+++ b/examples/perft/tricky.perft
@@ -123,3 +123,9 @@ epd 8/8/8/1k6/3Pp3/8/8/4KQ2 b - d3
 perft 1 6
 perft 2 121
 perft 3 711
+
+id ep-unrelated-check
+epd rnbqk1nr/bb3p1p/1q2r3/2pPp3/3P4/7P/1PP1NpPP/R1BQKBNR w KQkq c6
+perft 1 2
+perft 2 92
+perft 3 2528

From ad279165c78ec46ecc9a4d03004ce20b61f41ecf Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 6 Feb 2022 15:54:09 +0100
Subject: [PATCH 279/613] Detect impossible check due to en passant

---
 chess/__init__.py | 21 +++++++++++++++------
 chess/variant.py  |  5 +++--
 test.py           | 12 ++++++++++--
 3 files changed, 28 insertions(+), 10 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 4d58d6e32..9ce9daa32 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -3356,12 +3356,21 @@ def status(self) -> Status:
         # More than the maximum number of possible checkers in the variant.
         checkers = self.checkers_mask()
         our_kings = self.kings & self.occupied_co[self.turn] & ~self.promoted
-        if popcount(checkers) > 2:
-            errors |= STATUS_TOO_MANY_CHECKERS
-        elif popcount(checkers) == 2 and ray(lsb(checkers), msb(checkers)) & our_kings:
-            errors |= STATUS_IMPOSSIBLE_CHECK
-        elif valid_ep_square is not None and any(ray(checker, valid_ep_square) & our_kings for checker in scan_reversed(checkers)):
-            errors |= STATUS_IMPOSSIBLE_CHECK
+        if checkers:
+            if popcount(checkers) > 2:
+                errors |= STATUS_TOO_MANY_CHECKERS
+
+            if valid_ep_square is not None:
+                pushed_to = valid_ep_square ^ A2
+                pushed_from = valid_ep_square ^ A4
+                occupied_before = (self.occupied & ~BB_SQUARES[pushed_to]) | BB_SQUARES[pushed_from]
+                if popcount(checkers) > 1 or (
+                        msb(checkers) != pushed_to and
+                        self._attacked_for_king(our_kings, occupied_before)):
+                    errors |= STATUS_IMPOSSIBLE_CHECK
+            else:
+                if popcount(checkers) > 2 or (popcount(checkers) == 2 and ray(lsb(checkers), msb(checkers)) & our_kings):
+                    errors |= STATUS_IMPOSSIBLE_CHECK
 
         return errors
 
diff --git a/chess/variant.py b/chess/variant.py
index 82f841648..9e586b79c 100644
--- a/chess/variant.py
+++ b/chess/variant.py
@@ -320,7 +320,8 @@ def status(self) -> chess.Status:
             status &= ~chess.STATUS_NO_BLACK_KING
         if chess.popcount(self.checkers_mask()) <= 14:
             status &= ~chess.STATUS_TOO_MANY_CHECKERS
-        status &= ~chess.STATUS_IMPOSSIBLE_CHECK
+        if self._valid_ep_square() is None:
+            status &= ~chess.STATUS_IMPOSSIBLE_CHECK
         return status
 
 
@@ -409,7 +410,7 @@ def has_insufficient_material(self, color: chess.Color) -> bool:
     def status(self) -> chess.Status:
         status = super().status()
         if self.is_check():
-            status |= chess.STATUS_RACE_CHECK | chess.STATUS_TOO_MANY_CHECKERS
+            status |= chess.STATUS_RACE_CHECK | chess.STATUS_TOO_MANY_CHECKERS | chess.STATUS_IMPOSSIBLE_CHECK
         if self.turn == chess.BLACK and all(self.occupied_co[co] & self.kings & chess.BB_RANK_8 for co in chess.COLORS):
             status |= chess.STATUS_RACE_OVER
         if self.pawns:
diff --git a/test.py b/test.py
index 0aac186fb..ace378c43 100755
--- a/test.py
+++ b/test.py
@@ -994,7 +994,7 @@ def test_status(self):
 
         # Triple check.
         board = chess.Board("4k3/5P2/3N4/8/8/8/4R3/4K3 b - - 0 1")
-        self.assertEqual(board.status(), chess.STATUS_TOO_MANY_CHECKERS)
+        self.assertEqual(board.status(), chess.STATUS_TOO_MANY_CHECKERS | chess.STATUS_IMPOSSIBLE_CHECK)
 
         # Impossible checker alignment.
         board = chess.Board("3R4/8/q4k2/2B5/1NK5/3b4/8/8 w - - 0 1")
@@ -1675,6 +1675,14 @@ def test_king_captures_unmoved_rook(self):
         board.push(move)
         self.assertEqual(board.fen(), "8/8/8/B2p3Q/2qPp1P1/b7/2P2P1P/4K2k w - - 0 2")
 
+    def test_impossible_check_due_to_en_passant(self):
+        board = chess.Board("rnbqk1nr/bb3p1p/1q2r3/2pPp3/3P4/7P/1PP1NpPP/R1BQKBNR w KQkq c6")
+        self.assertEqual(board.status(), chess.STATUS_IMPOSSIBLE_CHECK)
+        self.assertEqual(board.ep_square, chess.C6)
+        self.assertTrue(board.has_pseudo_legal_en_passant())
+        self.assertFalse(board.has_legal_en_passant())
+        self.assertEqual(len(list(board.legal_moves)), 2)
+
 
 class LegalMoveGeneratorTestCase(unittest.TestCase):
 
@@ -4279,7 +4287,7 @@ def test_legal_moves_after_end(self):
     def test_racing_kings_status_with_check(self):
         board = chess.variant.RacingKingsBoard("8/8/8/8/R7/8/krbnNB1K/qrbnNBRQ b - - 1 1")
         self.assertFalse(board.is_valid())
-        self.assertEqual(board.status(), chess.STATUS_RACE_CHECK | chess.STATUS_TOO_MANY_CHECKERS)
+        self.assertEqual(board.status(), chess.STATUS_RACE_CHECK | chess.STATUS_TOO_MANY_CHECKERS | chess.STATUS_IMPOSSIBLE_CHECK)
 
 
 class HordeTestCase(unittest.TestCase):

From 6451f5211aefaf55a408af78ca37cc225fedc7d6 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 2 Mar 2022 15:02:13 +0100
Subject: [PATCH 280/613] Provide hint for SIGILL (#858)

---
 chess/engine.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 7fdf7fed6..b82043c34 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1229,7 +1229,8 @@ def __init__(self, engine: ProtocolT) -> None:
         self.finished: asyncio.Future[None] = asyncio.Future()
 
     def _engine_terminated(self, engine: ProtocolT, code: int) -> None:
-        exc = EngineTerminatedError(f"engine process died unexpectedly (exit code: {code})")
+        hint = ", binary not compatible with cpu?" if code in [-4, 0xc000001d] else ""
+        exc = EngineTerminatedError(f"engine process died unexpectedly (exit code: {code}{hint})")
         if self.state == CommandState.ACTIVE:
             self.engine_terminated(engine, exc)
         elif self.state == CommandState.CANCELLING:

From 193a3ba0994cb218be31499af2a1786bd967e645 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 2 Mar 2022 16:38:09 +0100
Subject: [PATCH 281/613] Fill squares with arbitrary colors (closes #774)

---
 chess/svg.py | 50 +++++++++++++++++++++++++++++++++++++++-----------
 docs/Ne4.svg |  9 ++++++++-
 2 files changed, 47 insertions(+), 12 deletions(-)

diff --git a/chess/svg.py b/chess/svg.py
index 4f10c5789..5a9cccc0a 100644
--- a/chess/svg.py
+++ b/chess/svg.py
@@ -183,8 +183,11 @@ def _attrs(attrs: Dict[str, Union[str, int, float, None]]) -> Dict[str, str]:
     return {k: str(v) for k, v in attrs.items() if v is not None}
 
 
-def _color(colors: Dict[str, str], color: str) -> Tuple[str, float]:
-    color = colors.get(color, DEFAULT_COLORS[color])
+def _select_color(colors: Dict[str, str], color: str) -> Tuple[str, float]:
+    return _color(colors.get(color, DEFAULT_COLORS[color]))
+
+
+def _color(color: str) -> Tuple[str, float]:
     if color.startswith("#"):
         try:
             if len(color) == 5:
@@ -236,6 +239,7 @@ def board(board: Optional[chess.BaseBoard] = None, *,
           lastmove: Optional[chess.Move] = None,
           check: Optional[Square] = None,
           arrows: Iterable[Union[Arrow, Tuple[Square, Square]]] = [],
+          fill: Dict[Square, str] = {},
           squares: Optional[IntoSquareSet] = None,
           size: Optional[int] = None,
           coordinates: bool = True,
@@ -254,7 +258,10 @@ def board(board: Optional[chess.BaseBoard] = None, *,
         ``[chess.svg.Arrow(chess.E2, chess.E4)]``, or a list of tuples, like
         ``[(chess.E2, chess.E4)]``. An arrow from a square pointing to the same
         square is drawn as a circle, like ``[(chess.E2, chess.E2)]``.
-    :param squares: A :class:`chess.SquareSet` with selected squares.
+    :param fill: A dictionary mapping squares to a colors that they should be
+        filled with.
+    :param squares: A :class:`chess.SquareSet` with selected squares to mark
+        with an X.
     :param size: The size of the image in pixels (e.g., ``400`` for a 400 by
         400 board), or ``None`` (the default) for no size limit.
     :param coordinates: Pass ``False`` to disable the coordinate margin.
@@ -270,8 +277,14 @@ def board(board: Optional[chess.BaseBoard] = None, *,
     >>> import chess.svg
     >>>
     >>> board = chess.Board("8/8/8/8/4N3/8/8/8 w - - 0 1")
-    >>> squares = board.attacks(chess.E4)
-    >>> chess.svg.board(board, squares=squares, size=350)  # doctest: +SKIP
+    >>>
+    >>> chess.svg.board(
+    ...     board,
+    ...     fill=dict.fromkeys(board.attacks(chess.E4), "#cc0000cc") | {chess.E4: "#00cc00cc"},
+    ...     arrows=[chess.svg.Arrow(chess.E4, chess.F6, color="#0000cccc")],
+    ...     squares=chess.SquareSet(chess.BB_DARK_SQUARES & chess.BB_FILE_B),
+    ...     size=350,
+    ... )  # doctest: +SKIP
 
     .. image:: ../docs/Ne4.svg
         :alt: 8/8/8/8/4N3/8/8/8
@@ -307,7 +320,7 @@ def board(board: Optional[chess.BaseBoard] = None, *,
 
     # Render coordinates.
     if coordinates:
-        margin_color, margin_opacity = _color(colors, "margin")
+        margin_color, margin_opacity = _select_color(colors, "margin")
         ET.SubElement(svg, "rect", _attrs({
             "x": 0,
             "y": 0,
@@ -316,7 +329,7 @@ def board(board: Optional[chess.BaseBoard] = None, *,
             "fill": margin_color,
             "opacity": margin_opacity if margin_opacity < 1.0 else None,
         }))
-        coord_color, coord_opacity = _color(colors, "coord")
+        coord_color, coord_opacity = _select_color(colors, "coord")
         for file_index, file_name in enumerate(chess.FILE_NAMES):
             x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin
             svg.append(_coord(file_name, x, 0, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity))
@@ -337,7 +350,7 @@ def board(board: Optional[chess.BaseBoard] = None, *,
         cls = ["square", "light" if chess.BB_LIGHT_SQUARES & bb else "dark"]
         if lastmove and square in [lastmove.from_square, lastmove.to_square]:
             cls.append("lastmove")
-        fill_color, fill_opacity = _color(colors, " ".join(cls))
+        square_color, square_opacity = _select_color(colors, " ".join(cls))
 
         cls.append(chess.SQUARE_NAMES[square])
 
@@ -348,10 +361,25 @@ def board(board: Optional[chess.BaseBoard] = None, *,
             "height": SQUARE_SIZE,
             "class": " ".join(cls),
             "stroke": "none",
-            "fill": fill_color,
-            "opacity": fill_opacity if fill_opacity < 1.0 else None,
+            "fill": square_color,
+            "opacity": square_opacity if square_opacity < 1.0 else None,
         }))
 
+        try:
+            fill_color, fill_opacity = _color(fill[square])
+        except KeyError:
+            pass
+        else:
+            ET.SubElement(svg, "rect", _attrs({
+                "x": x,
+                "y": y,
+                "width": SQUARE_SIZE,
+                "height": SQUARE_SIZE,
+                "stroke": "none",
+                "fill": fill_color,
+                "opacity": fill_opacity if fill_opacity < 1.0 else None,
+            }))
+
     # Render check mark.
     if check is not None:
         file_index = chess.square_file(check)
@@ -405,7 +433,7 @@ def board(board: Optional[chess.BaseBoard] = None, *,
             color = "green"
 
         try:
-            color, opacity = _color(colors, " ".join(["arrow", color]))
+            color, opacity = _select_color(colors, " ".join(["arrow", color]))
         except KeyError:
             opacity = 1.0
 
diff --git a/docs/Ne4.svg b/docs/Ne4.svg
index 65dab1125..4d97635e2 100644
--- a/docs/Ne4.svg
+++ b/docs/Ne4.svg
@@ -1 +1,8 @@
-
\ No newline at end of file
+
. . . . . . . .
+. . . . . . . .
+. . . . . . . .
+. . . . . . . .
+. . . . N . . .
+. . . . . . . .
+. . . . . . . .
+. . . . . . . .


From 197534f04e0b03df89af1642d8a091e11a5edf8e Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 2 Mar 2022 18:01:19 +0100
Subject: [PATCH 282/613] Update GitHub actions

---
 .github/workflows/codeql.yml |  2 +-
 .github/workflows/test.yml   | 16 ++++++++--------
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 31a63b204..a1b9e1b55 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -11,7 +11,7 @@ jobs:
       contents: read
       security-events: write
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: github/codeql-action/init@v1
         with:
           languages: python
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7f3d24e5c..dfeeacc1f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,8 +10,8 @@ jobs:
         python-version: ["3.7", "3.8", "3.9", "3.10"]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}
       - run: .github/workflows/setup-${{ matrix.os }}.sh
@@ -21,8 +21,8 @@ jobs:
   perft:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v3
         with:
           python-version: "3.10.0-alpha.2"
       - run: pip install -e .
@@ -40,8 +40,8 @@ jobs:
         python-version: ["3.8", "3.9", "3.10"]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}
       - run: pip install -e .
@@ -54,8 +54,8 @@ jobs:
         python-version: ["3.10"]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python-version }}
       - run: sudo apt-get update && sudo apt-get install -y docutils-common

From 03509ec03108923b4a141052a99b8f23ff7a8f74 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 18 Mar 2022 11:08:32 +0100
Subject: [PATCH 283/613] Prepare 1.9.0

---
 CHANGELOG.rst     | 18 ++++++++++++++++--
 chess/__init__.py |  2 +-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 705421688..1575e713b 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,20 @@
 Changelog for python-chess
 ==========================
 
+New in v1.9.0
+-------------
+
+Bugfixes:
+
+* Expand position validation to detect check conflicting with en passant
+  square.
+
+New features:
+
+* Add ``chess.svg.board(..., fill=...)``.
+* Let ``chess.svg.board()`` add ASCII board as description of SVG.
+* Add hint when engine process dies due to illegal instruction.
+
 New in v1.8.0
 -------------
 
@@ -18,9 +32,9 @@ New in v1.7.0
 
 New features:
 
-* Added new models for ``chess.engine.Score.wdl()``: ``sf`` (the new default)
+* Add new models for ``chess.engine.Score.wdl()``: ``sf`` (the new default)
   and ``sf14``.
-* Added ``chess.Board.piece_map()``.
+* Add ``chess.Board.piece_map()``.
 
 Bugfixes:
 
diff --git a/chess/__init__.py b/chess/__init__.py
index 9ce9daa32..da7ff8cbc 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -27,7 +27,7 @@
 
 __email__ = "niklas.fiekas@backscattering.de"
 
-__version__ = "1.8.0"
+__version__ = "1.9.0"
 
 import collections
 import copy

From a21836dafec051143573243752d83002297a4d37 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 18 Mar 2022 12:28:43 +0100
Subject: [PATCH 284/613] Update CI to run perft tests on stable Python

---
 .github/workflows/test.yml | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index dfeeacc1f..5a478ad60 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -24,7 +24,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v3
         with:
-          python-version: "3.10.0-alpha.2"
+          python-version: "3.10"
       - run: pip install -e .
       - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000
       - run: python examples/perft/perft.py -t 1 examples/perft/tricky.perft
@@ -49,15 +49,12 @@ jobs:
       - run: python -m mypy --strict chess
       - run: python -m mypy --strict examples/**/*.py
   readme:
-    strategy:
-      matrix:
-        python-version: ["3.10"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v3
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: "3.10"
       - run: sudo apt-get update && sudo apt-get install -y docutils-common
       - run: python setup.py --long-description | rst2html --strict --no-raw > /dev/null
       - run: pip install -e .

From eef8a29907e91662a24a4f0a79416f14c8a6d24c Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 18 Mar 2022 12:29:14 +0100
Subject: [PATCH 285/613] Try type-checking on Windows

---
 .github/workflows/test.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5a478ad60..73b5ea44b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -37,6 +37,7 @@ jobs:
   mypy:
     strategy:
       matrix:
+        os: [ubuntu-latest, windows-latest]
         python-version: ["3.8", "3.9", "3.10"]
     runs-on: ubuntu-latest
     steps:

From f3367ea4b1402ed04be2190371ebc8c72c2276c8 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 1 Apr 2022 16:16:12 +0200
Subject: [PATCH 286/613] Faithfully preserve whitespace in PGN comments

---
 chess/pgn.py | 49 +++++++++++++++++++++++++------------------------
 test.py      |  6 +++---
 2 files changed, 28 insertions(+), 27 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index a7269c658..070f12f89 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -1584,42 +1584,43 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any:
 
     # Parse movetext.
     skip_variation_depth = 0
+    fresh_line = True
     while line:
-        read_next_line = True
-
-        # Ignore comments.
-        if line.startswith("%") or line.startswith(";"):
-            line = handle.readline()
-            continue
-
-        # An empty line means the end of a game.
-        if line.isspace():
-            visitor.end_game()
-            return visitor.result()
+        if fresh_line:
+            # Ignore comments.
+            if line.startswith("%") or line.startswith(";"):
+                line = handle.readline()
+                continue
+            # An empty line means the end of a game.
+            if line.isspace():
+                visitor.end_game()
+                return visitor.result()
+        fresh_line = True
 
         for match in MOVETEXT_REGEX.finditer(line):
             token = match.group(0)
 
             if token.startswith("{"):
                 # Consume until the end of the comment.
-                line = token[1:]
+                start_index = 2 if token.startswith("{ ") else 1
+                line = token[start_index:]
+
                 comment_lines = []
                 while line and "}" not in line:
-                    comment_lines.append(line.rstrip())
+                    comment_lines.append(line)
                     line = handle.readline()
-                end_index = line.find("}")
-                comment_lines.append(line[:end_index])
-                if "}" in line:
-                    line = line[end_index:]
-                else:
-                    line = ""
+
+                if line:
+                    close_index = line.find("}")
+                    end_index = close_index - 1 if close_index > 0 and line[close_index - 1] == " " else close_index
+                    comment_lines.append(line[:end_index])
+                    line = line[close_index + 1:]
 
                 if not skip_variation_depth:
-                    visitor.visit_comment("\n".join(comment_lines).strip())
+                    visitor.visit_comment("".join(comment_lines))
 
-                # Continue with the current or the next line.
-                if line:
-                    read_next_line = False
+                # Continue with the current line.
+                fresh_line = False
                 break
             elif token == "(":
                 if skip_variation_depth:
@@ -1673,7 +1674,7 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any:
                     board_stack[-1].push(move)
                 visitor.visit_board(board_stack[-1])
 
-        if read_next_line:
+        if fresh_line:
             line = handle.readline()
 
     visitor.end_game()
diff --git a/test.py b/test.py
index ace378c43..8db8ea150 100755
--- a/test.py
+++ b/test.py
@@ -2189,9 +2189,9 @@ def test_read_game(self):
         self.assertEqual(sixth_game.headers["Result"], "1-0")
 
     def test_comment_at_eol(self):
-        pgn = io.StringIO(textwrap.dedent(r"""\
+        pgn = io.StringIO(textwrap.dedent("""\
             1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. Nbd2 a6 $6 (6... Bb6 $5 {
-            /\ Ne7, c6}) *"""))
+            /\\ Ne7, c6}) *"""))
 
         game = chess.pgn.read_game(pgn)
 
@@ -2202,7 +2202,7 @@ def test_comment_at_eol(self):
 
         # Make sure the comment for the second variation is there.
         self.assertIn(5, node[1].nags)
-        self.assertEqual(node[1].comment, "/\\ Ne7, c6")
+        self.assertEqual(node[1].comment, "\n/\\ Ne7, c6")
 
     def test_promotion_without_equals(self):
         # Example game from https://github.com/rozim/ChessData as originally

From 0ef3988c49ca8894d76f8fc7f04d3395720b39df Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 1 Apr 2022 16:40:28 +0200
Subject: [PATCH 287/613] Join multiple PGN comments with spaces (closes #866)

---
 chess/pgn.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 070f12f89..7b5994cde 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -1146,11 +1146,11 @@ def visit_comment(self, comment: str) -> None:
             # a variation. Add as a comment for the game if the comment
             # starts before any move.
             new_comment = [self.variation_stack[-1].comment, comment]
-            self.variation_stack[-1].comment = "\n".join(new_comment).strip()
+            self.variation_stack[-1].comment = " ".join(filter(None, new_comment))
         else:
             # Otherwise, it is a starting comment.
             new_comment = [self.starting_comment, comment]
-            self.starting_comment = "\n".join(new_comment).strip()
+            self.starting_comment = " ".join(filter(None, new_comment))
 
     def visit_move(self, board: chess.Board, move: chess.Move) -> None:
         self.variation_stack[-1] = self.variation_stack[-1].add_variation(move)

From f11c4f4a3fd307494e57a2856111cfb4ea212860 Mon Sep 17 00:00:00 2001
From: kraktus 
Date: Sun, 3 Apr 2022 16:02:01 +0200
Subject: [PATCH 288/613] Syzygy probing: Use list instead of dict

Tests passed. Looking at the code those variables where only accessed by index so I'm not sure why they were defined as dict. Could be done for visibility purpose, then feel free to close the PR.

`PawnFileData` could probably be further refractored not to use dicts at all anymore, since it looks like the rust implementation only use `ArrayVec`.
---
 chess/syzygy.py | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/chess/syzygy.py b/chess/syzygy.py
index 3b477e769..7436520f3 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -577,8 +577,7 @@ def __init__(self, path: str, *, variant: Type[chess.Board] = chess.Board) -> No
 
         black_part, white_part = tablename.split("v")
         if self.has_pawns:
-            self.pawns = {0: white_part.count("P"),
-                          1: black_part.count("P")}
+            self.pawns = [white_part.count("P"), black_part.count("P")]
             if self.pawns[1] > 0 and (self.pawns[0] == 0 or self.pawns[1] < self.pawns[0]):
                 self.pawns[0], self.pawns[1] = self.pawns[1], self.pawns[0]
         else:
@@ -1078,11 +1077,9 @@ def init_table_wdl(self) -> None:
             self.precomp: Dict[int, PairsData] = {}
             self.pieces: Dict[int, List[int]] = {}
 
-            self.factor = {0: [0 for _ in range(TBPIECES)],
-                           1: [0 for _ in range(TBPIECES)]}
+            self.factor = [[0 for _ in range(TBPIECES)], [0 for _ in range(TBPIECES)]]
 
-            self.norm = {0: [0 for _ in range(self.num)],
-                         1: [0 for _ in range(self.num)]}
+            self.norm = [[0 for _ in range(self.num)], [0 for _ in range(self.num)]]
 
             # Used if there are pawns.
             self.files = [PawnFileData() for _ in range(4)]

From fdb236833a5f03257f9e7be686e6a20be509ddbd Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 4 Apr 2022 09:38:27 +0200
Subject: [PATCH 289/613] Code golf norm and factor init

---
 chess/syzygy.py | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/chess/syzygy.py b/chess/syzygy.py
index 7436520f3..33302ba46 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -1076,10 +1076,8 @@ def init_table_wdl(self) -> None:
             # Used if there are only pieces.
             self.precomp: Dict[int, PairsData] = {}
             self.pieces: Dict[int, List[int]] = {}
-
-            self.factor = [[0 for _ in range(TBPIECES)], [0 for _ in range(TBPIECES)]]
-
-            self.norm = [[0 for _ in range(self.num)], [0 for _ in range(self.num)]]
+            self.factor = [[0 for _ in range(TBPIECES)] for _ in range(2)]
+            self.norm = [[0 for _ in range(self.num)] for _ in range(2)]
 
             # Used if there are pawns.
             self.files = [PawnFileData() for _ in range(4)]

From 5b3126e1ac6a7b8315f9b0970b800cdb1490d317 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 18 Apr 2022 12:19:19 +0200
Subject: [PATCH 290/613] Implement and switch to upcoming sf15 WDL model

---
 chess/engine.py | 18 +++++++++++++++---
 test.py         |  1 +
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index b82043c34..7a01f6b1e 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -44,7 +44,7 @@
 
 try:
     from typing import Literal
-    _WdlModel = Literal["sf", "sf14", "sf12", "lichess"]
+    _WdlModel = Literal["sf", "sf15", "sf14", "sf12", "lichess"]
 except ImportError:
     # Before Python 3.8.
     _WdlModel = str  # type: ignore
@@ -564,7 +564,8 @@ def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> Wdl:
 
         :param model:
             * ``sf``, the WDL model used by the latest Stockfish
-              (currently ``sf14``).
+              (currently ``sf15``).
+            * ``sf15``, the WDL model used by Stockfish 15.
             * ``sf14``, the WDL model used by Stockfish 14.
             * ``sf12``, the WDL model used by Stockfish 12.
             * ``lichess``, the win rate model used by Lichess.
@@ -627,6 +628,14 @@ def __ge__(self, other: object) -> bool:
             return NotImplemented
 
 
+def _sf15_wins(cp: int, *, ply: int) -> int:
+    # https://github.com/official-stockfish/Stockfish/blob/sf_15/src/uci.cpp#L200-L220
+    m = min(240, max(ply, 0)) / 64
+    a = (((-1.17202460e-1 * m + 5.94729104e-1) * m + 1.12065546e+1) * m) + 1.22606222e+2
+    b = (((-1.79066759 * m + 11.30759193) * m + -17.43677612) * m) + 36.47147479
+    x = min(2000, max(cp, -2000))
+    return int(0.5 + 1000 / (1 + math.exp((a - x) / b)))
+
 def _sf14_wins(cp: int, *, ply: int) -> int:
     # https://github.com/official-stockfish/Stockfish/blob/sf_14/src/uci.cpp#L200-L220
     m = min(240, max(ply, 0)) / 64
@@ -666,9 +675,12 @@ def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> Wdl:
         elif model == "sf12":
             wins = _sf12_wins(self.cp, ply=ply)
             losses = _sf12_wins(-self.cp, ply=ply)
-        else:
+        elif model == "sf14":
             wins = _sf14_wins(self.cp, ply=ply)
             losses = _sf14_wins(-self.cp, ply=ply)
+        else:
+            wins = _sf15_wins(self.cp, ply=ply)
+            losses = _sf15_wins(-self.cp, ply=ply)
         draws = 1000 - wins - losses
         return Wdl(wins, draws, losses)
 
diff --git a/test.py b/test.py
index 8db8ea150..004acc813 100755
--- a/test.py
+++ b/test.py
@@ -2937,6 +2937,7 @@ def test_score(self):
     def test_wdl_model(self):
         self.assertEqual(chess.engine.Cp(131).wdl(model="sf12", ply=25), chess.engine.Wdl(524, 467, 9))
         self.assertEqual(chess.engine.Cp(146).wdl(model="sf14", ply=25), chess.engine.Wdl(601, 398, 1))
+        self.assertEqual(chess.engine.Cp(40).wdl(model="sf15", ply=25), chess.engine.Wdl(58, 937, 5))
 
     @catchAndSkip(FileNotFoundError, "need stockfish")
     def test_sf_forced_mates(self):

From d20c56feb85330d1fb8c11e39ea8c58781c95cad Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 18 Apr 2022 12:42:38 +0200
Subject: [PATCH 291/613] Reject pawn capture SAN if file not specified (fixes
 #870)

---
 chess/__init__.py |  4 ++++
 test.py           | 10 ++++++----
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index da7ff8cbc..3a6a5ebf9 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -3004,6 +3004,10 @@ def parse_san(self, san: str) -> Move:
         else:
             from_mask &= self.pawns
 
+            # Do not allow pawn captures if file is not specified.
+            if not match.group(2):
+                to_mask &= ~self.occupied
+
         # Match legal moves.
         matched_move = None
         for move in self.generate_legal_moves(from_mask, to_mask):
diff --git a/test.py b/test.py
index 004acc813..19b41cc01 100755
--- a/test.py
+++ b/test.py
@@ -717,15 +717,17 @@ def test_lan(self):
         self.assertEqual(board.fen(), fen)
 
     def test_san_newline(self):
-        fen = "rnbqk2r/ppppppbp/5np1/8/8/5NP1/PPPPPPBP/RNBQK2R w KQkq - 2 4"
-        board = chess.Board(fen)
-
+        board = chess.Board("rnbqk2r/ppppppbp/5np1/8/8/5NP1/PPPPPPBP/RNBQK2R w KQkq - 2 4")
         with self.assertRaises(ValueError):
             board.parse_san("O-O\n")
-
         with self.assertRaises(ValueError):
             board.parse_san("Nc3\n")
 
+    def test_pawn_capture_san_without_file(self):
+        board = chess.Board("2rq1rk1/pb2bppp/1p2p3/n1ppPn2/2PP4/PP3N2/1B1NQPPP/RB3RK1 b - - 4 13")
+        with self.assertRaises(ValueError):
+            board.parse_san("c4")
+
     def test_variation_san(self):
         board = chess.Board()
         self.assertEqual('1. e4 e5 2. Nf3',

From 46b1b0a6a1a7feda89775fc861a9b15fb5581740 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 18 Apr 2022 16:55:10 +0200
Subject: [PATCH 292/613] Also require SAN file for ep captures (#870)

---
 chess/__init__.py | 2 +-
 test.py           | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 3a6a5ebf9..9f3d77724 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -3006,7 +3006,7 @@ def parse_san(self, san: str) -> Move:
 
             # Do not allow pawn captures if file is not specified.
             if not match.group(2):
-                to_mask &= ~self.occupied
+                from_mask &= BB_FILES[square_file(to_square)]
 
         # Match legal moves.
         matched_move = None
diff --git a/test.py b/test.py
index 19b41cc01..b425f9c1d 100755
--- a/test.py
+++ b/test.py
@@ -727,6 +727,9 @@ def test_pawn_capture_san_without_file(self):
         board = chess.Board("2rq1rk1/pb2bppp/1p2p3/n1ppPn2/2PP4/PP3N2/1B1NQPPP/RB3RK1 b - - 4 13")
         with self.assertRaises(ValueError):
             board.parse_san("c4")
+        board = chess.Board("4k3/8/8/4Pp2/8/8/8/4K3 w - f6 0 2")
+        with self.assertRaises(ValueError):
+            board.parse_san("f6")
 
     def test_variation_san(self):
         board = chess.Board()

From 88ac4b1787010bb48ccce1b6572de09e86fbf12a Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 18 Apr 2022 20:14:27 +0200
Subject: [PATCH 293/613] Add Crazyhouse perft involving promoted pieces

---
 examples/perft/crazyhouse.perft | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/examples/perft/crazyhouse.perft b/examples/perft/crazyhouse.perft
index e693ff5df..90c110092 100644
--- a/examples/perft/crazyhouse.perft
+++ b/examples/perft/crazyhouse.perft
@@ -16,3 +16,10 @@ perft 1 42
 perft 2 1347
 perft 3 58057
 perft 4 2083382
+
+id zh-promoted
+epd 1Q~6/4k3/8/8/8/8/Kpp5/8[] w - -
+perft 1 23
+perft 2 210
+perft 3 4909
+perft 4 55679

From 489b49d45ebd56a93ad42a3415bbffde2e79533c Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 18 Apr 2022 20:19:09 +0200
Subject: [PATCH 294/613] Make recently added Crazyhouse perft more interesting

---
 examples/perft/crazyhouse.perft | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/examples/perft/crazyhouse.perft b/examples/perft/crazyhouse.perft
index 90c110092..cff0ba34a 100644
--- a/examples/perft/crazyhouse.perft
+++ b/examples/perft/crazyhouse.perft
@@ -18,8 +18,8 @@ perft 3 58057
 perft 4 2083382
 
 id zh-promoted
-epd 1Q~6/4k3/8/8/8/8/Kpp5/8[] w - -
-perft 1 23
-perft 2 210
-perft 3 4909
-perft 4 55679
+epd 4k3/1Q~6/8/8/4b3/8/Kpp5/8/ b - - 0 1
+perft 1 20
+perft 2 360
+perft 3 5445
+perft 4 132758

From 8acbcc89438289d2a17967a2ca3dd1350db9b68e Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 22 Apr 2022 18:50:20 +0200
Subject: [PATCH 295/613] Optimize writing to engine stdin

---
 chess/engine.py | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 7a01f6b1e..fce9221b1 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -936,13 +936,13 @@ def write(self, data: bytes) -> None:
 
             if line.startswith("ping ") and self.expected_pings:
                 self.expected_pings -= 1
-                self.protocol.pipe_data_received(1, line.replace("ping ", "pong ").encode("utf-8") + b"\n")
+                self.protocol.pipe_data_received(1, (line.replace("ping ", "pong ") + "\n").encode("utf-8"))
             else:
                 assert self.expectations, f"unexpected: {line!r}"
                 expectation, responses = self.expectations.popleft()
                 assert expectation == line, f"expected {expectation}, got: {line}"
                 if responses:
-                    self.protocol.pipe_data_received(1, "\n".join(responses).encode("utf-8") + b"\n")
+                    self.protocol.pipe_data_received(1, "\n".join(responses + [""]).encode("utf-8"))
 
     def get_pid(self) -> int:
         return id(self)
@@ -1010,8 +1010,7 @@ def send_line(self, line: str) -> None:
         assert self.transport is not None, "cannot send line before connection is made"
         stdin = self.transport.get_pipe_transport(0)
         # WriteTransport expected, but not checked to allow duck typing.
-        stdin.write(line.encode("utf-8"))  # type: ignore
-        stdin.write(b"\n")  # type: ignore
+        stdin.write((line + "\n").encode("utf-8"))  # type: ignore
 
     def pipe_data_received(self, fd: int, data: Union[bytes, str]) -> None:
         self.buffer[fd].extend(data)  # type: ignore

From b9f5b86c36a1c6542c5df3441b80de678ebc4732 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 30 Apr 2022 23:40:16 +0200
Subject: [PATCH 296/613] Latest mypy requires fewer ignores

---
 chess/engine.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index fce9221b1..b23b45f50 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -119,8 +119,8 @@ def _init_watcher(self) -> asyncio.AbstractChildWatcher:
             raise NotImplementedError
 
         try:
-            os.close(os.pidfd_open(os.getpid()))  # type: ignore
-            watcher: asyncio.AbstractChildWatcher = asyncio.PidfdChildWatcher()  # type: ignore
+            os.close(os.pidfd_open(os.getpid()))
+            watcher: asyncio.AbstractChildWatcher = asyncio.PidfdChildWatcher()
             LOGGER.debug("Using PidfdChildWatcher")
             return watcher
         except (AttributeError, OSError):
@@ -1222,7 +1222,7 @@ async def popen(cls: Type[ProtocolT], command: Union[str, List[str]], *, setpgrp
                 # Unix.
                 popen_args["start_new_session"] = True
 
-        return await asyncio.get_running_loop().subprocess_exec(cls, *command, **popen_args)  # type: ignore
+        return await asyncio.get_running_loop().subprocess_exec(cls, *command, **popen_args)
 
 
 class CommandState(enum.Enum):

From 2f72a7a1a94fb4615d90361d586fa555e10aff98 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 30 Apr 2022 23:47:20 +0200
Subject: [PATCH 297/613] Do not run mypy on 3.8

---
 .github/workflows/test.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 73b5ea44b..5e8683bdf 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -38,7 +38,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: ["3.8", "3.9", "3.10"]
+        python-version: ["3.9", "3.10"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3

From 8ebc88116339815b3a755cba13011057065239fb Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 21 May 2022 09:24:59 +0200
Subject: [PATCH 298/613] No need to separate PGN annotations after \n

---
 chess/pgn.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 7b5994cde..ccc560b46 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -512,7 +512,7 @@ def set_clock(self, seconds: Optional[float]) -> None:
         self.comment, found = CLOCK_REGEX.subn(clk, self.comment, count=1)
 
         if not found and clk:
-            if self.comment and not self.comment.endswith(" "):
+            if self.comment and not self.comment.endswith(" ") and not self.comment.endswith("\n"):
                 self.comment += " "
             self.comment += clk
 
@@ -546,7 +546,7 @@ def set_emt(self, seconds: Optional[float]) -> None:
         self.comment, found = EMT_REGEX.subn(emt, self.comment, count=1)
 
         if not found and emt:
-            if self.comment and not self.comment.endswith(" "):
+            if self.comment and not self.comment.endswith(" ") and not self.comment.endswith("\n"):
                 self.comment += " "
             self.comment += emt
 

From 89c12618464676e8961838fc5d47e7912bf2ef21 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 21 May 2022 09:32:41 +0200
Subject: [PATCH 299/613] Use named groups for PGN annotation regexes

---
 chess/pgn.py | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index ccc560b46..7cb43d1cc 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -120,20 +120,20 @@
 SKIP_MOVETEXT_REGEX = re.compile(r""";|\{|\}""")
 
 
-CLOCK_REGEX = re.compile(r"""\[%clk\s(\d+):(\d+):(\d+(?:\.\d*)?)\]""")
-EMT_REGEX = re.compile(r"""\[%emt\s(\d+):(\d+):(\d+(?:\.\d*)?)\]""")
+CLOCK_REGEX = re.compile(r"""\[%clk\s(?P\d+):(?P\d+):(?P\d+(?:\.\d*)?)\]""")
+EMT_REGEX = re.compile(r"""\[%emt\s(?P\d+):(?P\d+):(?P\d+(?:\.\d*)?)\]""")
 
 EVAL_REGEX = re.compile(r"""
     \[%eval\s(?:
-        \#([+-]?\d+)
-        |([+-]?(?:\d{0,10}\.\d{1,2}|\d{1,10}\.?))
+        \#(?P[+-]?\d+)
+        |(?P[+-]?(?:\d{0,10}\.\d{1,2}|\d{1,10}\.?))
     )(?:
-        ,(\d+)
+        ,(?P\d+)
     )?\]
     """, re.VERBOSE)
 
 ARROWS_REGEX = re.compile(r"""
-    \[%(?:csl|cal)\s(
+    \[%(?:csl|cal)\s(?P
         [RGYB][a-h][1-8](?:[a-h][1-8])?
         (?:,[RGYB][a-h][1-8](?:[a-h][1-8])?)*
     )\]
@@ -399,8 +399,8 @@ def eval(self) -> Optional[chess.engine.PovScore]:
 
         turn = self.turn()
 
-        if match.group(1):
-            mate = int(match.group(1))
+        if match.group("mate"):
+            mate = int(match.group("mate"))
             score: chess.engine.Score = chess.engine.Mate(mate)
             if mate == 0:
                 # Resolve this ambiguity in the specification in favor of
@@ -408,7 +408,7 @@ def eval(self) -> Optional[chess.engine.PovScore]:
                 # who has been mated.
                 return chess.engine.PovScore(score, turn)
         else:
-            score = chess.engine.Cp(int(float(match.group(2)) * 100))
+            score = chess.engine.Cp(int(float(match.group("cp")) * 100))
 
         return chess.engine.PovScore(score if turn else -score, turn)
 
@@ -418,7 +418,7 @@ def eval_depth(self) -> Optional[int]:
         this node and returns the corresponding depth, if any.
         """
         match = EVAL_REGEX.search(self.comment)
-        return int(match.group(3)) if match and match.group(3) else None
+        return int(match.group("depth")) if match and match.group("depth") else None
 
     def set_eval(self, score: Optional[chess.engine.PovScore], depth: Optional[int] = None) -> None:
         """
@@ -450,7 +450,7 @@ def arrows(self) -> List[chess.svg.Arrow]:
         """
         arrows = []
         for match in ARROWS_REGEX.finditer(self.comment):
-            for group in match.group(1).split(","):
+            for group in match.group("arrows").split(","):
                 arrows.append(chess.svg.Arrow.from_pgn(group))
 
         return arrows
@@ -493,7 +493,7 @@ def clock(self) -> Optional[float]:
         match = CLOCK_REGEX.search(self.comment)
         if match is None:
             return None
-        return int(match.group(1)) * 3600 + int(match.group(2)) * 60 + float(match.group(3))
+        return int(match.group("hours")) * 3600 + int(match.group("minutes")) * 60 + float(match.group("seconds"))
 
     def set_clock(self, seconds: Optional[float]) -> None:
         """
@@ -527,7 +527,7 @@ def emt(self) -> Optional[float]:
         match = EMT_REGEX.search(self.comment)
         if match is None:
             return None
-        return int(match.group(1)) * 3600 + int(match.group(2)) * 60 + float(match.group(3))
+        return int(match.group("hours")) * 3600 + int(match.group("minutes")) * 60 + float(match.group("seconds"))
 
     def set_emt(self, seconds: Optional[float]) -> None:
         """

From 1e7fcae546a51e4a03b280d3eab7ee1122a41e27 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 21 May 2022 11:39:26 +0200
Subject: [PATCH 300/613] Avoid extra space when removing PGN annotations

---
 chess/pgn.py | 30 ++++++++++++++++++++++--------
 test.py      |  6 +++++-
 2 files changed, 27 insertions(+), 9 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 7cb43d1cc..65c008d65 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -120,25 +120,37 @@
 SKIP_MOVETEXT_REGEX = re.compile(r""";|\{|\}""")
 
 
-CLOCK_REGEX = re.compile(r"""\[%clk\s(?P\d+):(?P\d+):(?P\d+(?:\.\d*)?)\]""")
-EMT_REGEX = re.compile(r"""\[%emt\s(?P\d+):(?P\d+):(?P\d+(?:\.\d*)?)\]""")
+CLOCK_REGEX = re.compile(r"""(?P\s?)\[%clk\s(?P\d+):(?P\d+):(?P\d+(?:\.\d*)?)\](?P\s?)""")
+EMT_REGEX = re.compile(r"""(?P\s?)\[%emt\s(?P\d+):(?P\d+):(?P\d+(?:\.\d*)?)\](?P\s?)""")
 
 EVAL_REGEX = re.compile(r"""
+    (?P\s?)
     \[%eval\s(?:
         \#(?P[+-]?\d+)
         |(?P[+-]?(?:\d{0,10}\.\d{1,2}|\d{1,10}\.?))
     )(?:
         ,(?P\d+)
     )?\]
+    (?P\s?)
     """, re.VERBOSE)
 
 ARROWS_REGEX = re.compile(r"""
+    (?P\s?)
     \[%(?:csl|cal)\s(?P
         [RGYB][a-h][1-8](?:[a-h][1-8])?
         (?:,[RGYB][a-h][1-8](?:[a-h][1-8])?)*
     )\]
+    (?P\s?)
     """, re.VERBOSE)
 
+def _condense_affix(infix: str):
+    def repl(match):
+        if infix:
+            return match.group("prefix") + infix + match.group("suffix")
+        else:
+            return match.group("prefix") and match.group("suffix")
+    return repl
+
 
 TAG_ROSTER = ["Event", "Site", "Date", "Round", "White", "Black", "Result"]
 
@@ -434,7 +446,7 @@ def set_eval(self, score: Optional[chess.engine.PovScore], depth: Optional[int]
             elif score.white().mate():
                 eval = f"[%eval #{score.white().mate()}{depth_suffix}]"
 
-        self.comment, found = EVAL_REGEX.subn(eval, self.comment, count=1)
+        self.comment, found = EVAL_REGEX.subn(_condense_affix(eval), self.comment, count=1)
 
         if not found and eval:
             if self.comment and not self.comment.endswith(" "):
@@ -471,7 +483,7 @@ def set_arrows(self, arrows: Iterable[Union[chess.svg.Arrow, Tuple[Square, Squar
                 pass
             (csl if arrow.tail == arrow.head else cal).append(arrow.pgn())  # type: ignore
 
-        self.comment = ARROWS_REGEX.sub("", self.comment).strip()
+        self.comment = ARROWS_REGEX.sub(_condense_affix(""), self.comment)
 
         prefix = ""
         if csl:
@@ -479,8 +491,10 @@ def set_arrows(self, arrows: Iterable[Union[chess.svg.Arrow, Tuple[Square, Squar
         if cal:
             prefix += f"[%cal {','.join(cal)}]"
 
-        if prefix:
-            self.comment = prefix + " " + self.comment if self.comment else prefix
+        if prefix and self.comment and not self.comment.startswith(" ") and not self.comment.startswith("\n"):
+            self.comment = prefix + " " + self.comment
+        else:
+            self.comment = prefix + self.comment
 
     def clock(self) -> Optional[float]:
         """
@@ -509,7 +523,7 @@ def set_clock(self, seconds: Optional[float]) -> None:
             seconds_part = f"{seconds:06.3f}".rstrip("0").rstrip(".")
             clk = f"[%clk {hours:d}:{minutes:02d}:{seconds_part}]"
 
-        self.comment, found = CLOCK_REGEX.subn(clk, self.comment, count=1)
+        self.comment, found = CLOCK_REGEX.subn(_condense_affix(clk), self.comment, count=1)
 
         if not found and clk:
             if self.comment and not self.comment.endswith(" ") and not self.comment.endswith("\n"):
@@ -543,7 +557,7 @@ def set_emt(self, seconds: Optional[float]) -> None:
             seconds_part = f"{seconds:06.3f}".rstrip("0").rstrip(".")
             emt = f"[%emt {hours:d}:{minutes:02d}:{seconds_part}]"
 
-        self.comment, found = EMT_REGEX.subn(emt, self.comment, count=1)
+        self.comment, found = EMT_REGEX.subn(_condense_affix(emt), self.comment, count=1)
 
         if not found and emt:
             if self.comment and not self.comment.endswith(" ") and not self.comment.endswith("\n"):
diff --git a/test.py b/test.py
index b425f9c1d..e4b3d3bf8 100755
--- a/test.py
+++ b/test.py
@@ -2774,9 +2774,13 @@ def test_annotations(self):
         self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%eval #1,5] [%emt 0:05:21]")
         self.assertEqual(game.emt(), emt)
 
+        game.set_eval(None)
+        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%emt 0:05:21]")
+
         game.set_emt(None)
+        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45]")
+
         game.set_clock(None)
-        game.set_eval(None)
         game.set_arrows([])
         self.assertEqual(game.comment, "foo [%bar] baz")
 

From 3663272b88e4b23f0c48e273741b7c1fac6b31f2 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 21 May 2022 11:57:57 +0200
Subject: [PATCH 301/613] Add type annotations for _condense_affix()

---
 chess/pgn.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 65c008d65..85002140a 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -143,8 +143,8 @@
     (?P\s?)
     """, re.VERBOSE)
 
-def _condense_affix(infix: str):
-    def repl(match):
+def _condense_affix(infix: str) -> Callable[[typing.Match[str]], str]:
+    def repl(match: typing.Match[str]) -> str:
         if infix:
             return match.group("prefix") + infix + match.group("suffix")
         else:

From 56b2410513ff6e64305ef5caed7eda68826145ed Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 21 May 2022 11:54:48 +0200
Subject: [PATCH 302/613] Prepare 1.9.1

---
 CHANGELOG.rst     | 20 ++++++++++++++++++++
 chess/__init__.py |  2 +-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 1575e713b..f9910db9c 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,26 @@
 Changelog for python-chess
 ==========================
 
+New in v1.9.1
+-------------
+
+Bugfixes:
+
+* Reject pawn capture SAN if the original file is not specified, e.g.,
+  ``d5`` will no longer match ``cxd5``.
+
+Changes:
+
+* Tweak handling of whitespace in PGN comments: When parsing, any leading
+  and trailing whitespace (beyond one space) is preserved. When joining
+  multiple PGN comments, they are now separated with a space instead of a
+  newline character. When removing annotations from comments, leftover
+  whitespace is avoided.
+
+New features:
+
+* Add model ``sf15`` for ``chess.engine.Score.wdl()``.
+
 New in v1.9.0
 -------------
 
diff --git a/chess/__init__.py b/chess/__init__.py
index 9f3d77724..7799bfe59 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -27,7 +27,7 @@
 
 __email__ = "niklas.fiekas@backscattering.de"
 
-__version__ = "1.9.0"
+__version__ = "1.9.1"
 
 import collections
 import copy

From 26015e9990fee57d9d9c3315dfccb61b261a90b7 Mon Sep 17 00:00:00 2001
From: Neil Stoker 
Date: Wed, 8 Jun 2022 05:58:39 +0100
Subject: [PATCH 303/613] Mention Chess Match Viewer (PyScript) in README
 (#890)

* Mention Chess Match Viewer (PyScript) in README

Would it be okay to mention this PyScript demo here? Hope the formatting is suitable.

* Putting back accidentally removed blank line

Error indicates that a blank line is needed after the bullet list. I seem to have removed the line accidentally and the GitHub editor was more forgiving than the rst process
---
 README.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.rst b/README.rst
index f02d0e584..7872edae3 100644
--- a/README.rst
+++ b/README.rst
@@ -342,6 +342,7 @@ If you like, share interesting things you are using python-chess for, for exampl
 * an `Alexa skill to play blindfold chess `_ – https://github.com/laynr/blindfold-chess
 * a chessboard widget for PySide2 – https://github.com/H-a-y-k/hichesslib
 * Django Rest Framework API for multiplayer chess – https://github.com/WorkShoft/capablanca-api
+* a `browser based PGN viewer `_ written in PyScript – https://github.com/nmstoker/ChessMatchViewer
 
 Acknowledgements
 ----------------

From f9d2b0d077be956c472807561e263bab6d8977fd Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 8 Jun 2022 19:14:15 +0200
Subject: [PATCH 304/613] Bump actions/setup-python to v4

---
 .github/workflows/test.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5e8683bdf..656af180f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v3
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
       - run: .github/workflows/setup-${{ matrix.os }}.sh
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v3
+      - uses: actions/setup-python@v4
         with:
           python-version: "3.10"
       - run: pip install -e .
@@ -42,7 +42,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v3
+      - uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
       - run: pip install -e .
@@ -53,7 +53,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v3
+      - uses: actions/setup-python@v4
         with:
           python-version: "3.10"
       - run: sudo apt-get update && sudo apt-get install -y docutils-common

From 34d74f94040d44f8ab89a987cad00d534cb2d196 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 8 Jun 2022 19:58:58 +0200
Subject: [PATCH 305/613] Document that editing board clears move stack (fixes
 #887)

---
 chess/__init__.py | 35 +++++++++++++++++++++++++----------
 docs/core.rst     |  1 +
 2 files changed, 26 insertions(+), 10 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 7799bfe59..604fd31f4 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -623,7 +623,13 @@ def _reset_board(self) -> None:
         self.occupied = BB_RANK_1 | BB_RANK_2 | BB_RANK_7 | BB_RANK_8
 
     def reset_board(self) -> None:
-        """Resets pieces to the starting position."""
+        """
+        Resets pieces to the starting position.
+
+        :class:`~chess.Board` also resets the move stack, but not turn,
+        castling rights and move counters. Use :func:`chess.Board.reset()` to
+        fully restore the starting position.
+        """
         self._reset_board()
 
     def _clear_board(self) -> None:
@@ -641,7 +647,11 @@ def _clear_board(self) -> None:
         self.occupied = BB_EMPTY
 
     def clear_board(self) -> None:
-        """Clears the board."""
+        """
+        Clears the board.
+
+        :class:`~chess.Board` also clears the move stack.
+        """
         self._clear_board()
 
     def pieces_mask(self, piece_type: PieceType, color: Color) -> Bitboard:
@@ -877,6 +887,8 @@ def remove_piece_at(self, square: Square) -> Optional[Piece]:
         """
         Removes the piece from the given square. Returns the
         :class:`~chess.Piece` or ``None`` if the square was already empty.
+
+        :class:`~chess.Board` also clears the move stack.
         """
         color = bool(self.occupied_co[WHITE] & BB_SQUARES[square])
         piece_type = self._remove_piece_at(square)
@@ -914,6 +926,8 @@ def set_piece_at(self, square: Square, piece: Optional[Piece], promoted: bool =
 
         An existing piece is replaced. Setting *piece* to ``None`` is
         equivalent to :func:`~chess.Board.remove_piece_at()`.
+
+        :class:`~chess.Board` also clears the move stack.
         """
         if piece is None:
             self._remove_piece_at(square)
@@ -1010,6 +1024,8 @@ def set_board_fen(self, fen: str) -> None:
         Parses *fen* and sets up the board, where *fen* is the board part of
         a FEN.
 
+        :class:`~chess.Board` also clears the move stack.
+
         :raises: :exc:`ValueError` if syntactically invalid.
         """
         self._set_board_fen(fen)
@@ -1032,6 +1048,8 @@ def set_piece_map(self, pieces: Mapping[Square, Piece]) -> None:
         """
         Sets up the board from a dictionary of :class:`pieces `
         by square index.
+
+        :class:`~chess.Board` also clears the move stack.
         """
         self._set_piece_map(pieces)
 
@@ -1283,8 +1301,8 @@ def apply_transform(self, f: Callable[[Bitboard], Bitboard]) -> None:
 
     def transform(self: BaseBoardT, f: Callable[[Bitboard], Bitboard]) -> BaseBoardT:
         """
-        Returns a transformed copy of the board by applying a bitboard
-        transformation function.
+        Returns a transformed copy of the board (without move stack)
+        by applying a bitboard transformation function.
 
         Available transformations include :func:`chess.flip_vertical()`,
         :func:`chess.flip_horizontal()`, :func:`chess.flip_diagonal()`,
@@ -1305,7 +1323,7 @@ def apply_mirror(self: BaseBoardT) -> None:
 
     def mirror(self: BaseBoardT) -> BaseBoardT:
         """
-        Returns a mirrored copy of the board.
+        Returns a mirrored copy of the board (without move stack).
 
         The board is mirrored vertically and piece colors are swapped, so that
         the position is equivalent modulo color.
@@ -1582,11 +1600,6 @@ def reset(self) -> None:
         self.reset_board()
 
     def reset_board(self) -> None:
-        """
-        Resets only pieces to the starting position. Use
-        :func:`~chess.Board.reset()` to fully restore the starting position
-        (including turn, castling rights, etc.).
-        """
         super().reset_board()
         self.clear_stack()
 
@@ -2524,6 +2537,8 @@ def set_castling_fen(self, castling_fen: str) -> None:
         """
         Sets castling rights from a string in FEN notation like ``Qqk``.
 
+        Also clears the move stack.
+
         :raises: :exc:`ValueError` if the castling FEN is syntactically
             invalid.
         """
diff --git a/docs/core.rst b/docs/core.rst
index ef7d3005a..d5790820a 100644
--- a/docs/core.rst
+++ b/docs/core.rst
@@ -108,6 +108,7 @@ Board
 
 .. autoclass:: chess.Board
     :members:
+    :exclude-members: set_piece_at, remove_piece_at, reset_board, set_board_fen, set_piece_map, set_chess960_pos, apply_transform
 
 .. autoclass:: chess.BaseBoard
     :members:

From 7c44637a154ca77db9bd0cbed55822b354ffd0cc Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 8 Jun 2022 20:33:57 +0200
Subject: [PATCH 306/613] Add AnalysisResult.would_block() (fixes #889)

---
 chess/engine.py | 21 +++++++++++++++++++++
 test.py         |  6 ++++++
 2 files changed, 27 insertions(+)

diff --git a/chess/engine.py b/chess/engine.py
index b23b45f50..45ff84630 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2601,6 +2601,19 @@ async def get(self) -> InfoDict:
 
         return info
 
+    def would_block(self) -> bool:
+        """
+        Checks if calling :func:`~chess.engine.AnalysisResult.get()`,
+        calling :func:`~chess.engine.AnalysisResult.next()`,
+        calling :func:`~chess.engine.AnalysisResult.wait()`, or advancing the
+        iterator one step would require waiting for the engine.
+
+        All of these functions would return immediately information is pending
+        (queue is not :func:`empty `)
+        or if the search is finished.
+        """
+        return not self._seen_kork and self._queue.empty()
+
     def empty(self) -> bool:
         """
         Checks if all information has been consumed.
@@ -2891,6 +2904,14 @@ def wait(self) -> BestMove:
             future = asyncio.run_coroutine_threadsafe(self.inner.wait(), self.simple_engine.protocol.loop)
         return future.result()
 
+    def would_block(self) -> bool:
+        async def _would_block() -> bool:
+            return self.inner.would_block()
+
+        with self.simple_engine._not_shut_down():
+            future = asyncio.run_coroutine_threadsafe(_would_block(), self.simple_engine.protocol.loop)
+        return future.result()
+
     def empty(self) -> bool:
         async def _empty() -> bool:
             return self.inner.empty()
diff --git a/test.py b/test.py
index e4b3d3bf8..fdaaa6290 100755
--- a/test.py
+++ b/test.py
@@ -2986,7 +2986,10 @@ def test_sf_analysis(self):
                 for info in analysis:
                     if "score" in info and info["score"].white() >= chess.engine.Mate(+2):
                         break
+
             analysis.wait()
+            self.assertFalse(analysis.would_block())
+
             self.assertEqual(analysis.info["score"].relative, chess.engine.Mate(+2))
             self.assertEqual(analysis.multipv[0]["score"].black(), chess.engine.Mate(-2))
 
@@ -2997,6 +3000,7 @@ def test_sf_analysis(self):
                 was_really_empty = False
             self.assertEqual(was_really_empty, was_empty)
             self.assertTrue(analysis.empty())
+            self.assertFalse(analysis.would_block())
             for info in analysis:
                 self.fail("all info should have been consumed")
 
@@ -3174,8 +3178,10 @@ async def main():
             mock.expect("go infinite")
             mock.expect("stop", ["bestmove e2e4"])
             result = await protocol.analysis(chess.Board())
+            self.assertTrue(result.would_block())
             result.stop()
             best = await result.wait()
+            self.assertFalse(result.would_block())
             self.assertEqual(best.move, chess.Move.from_uci("e2e4"))
             self.assertTrue(best.ponder is None)
             mock.assert_done()

From 4fa60209f1d46f3cb6ee282cca8afcb031ba1ef9 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 8 Jun 2022 20:41:22 +0200
Subject: [PATCH 307/613] Tweak would_block() and empty() docs

---
 chess/engine.py | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 45ff84630..efed7d89b 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2608,21 +2608,19 @@ def would_block(self) -> bool:
         calling :func:`~chess.engine.AnalysisResult.wait()`, or advancing the
         iterator one step would require waiting for the engine.
 
-        All of these functions would return immediately information is pending
-        (queue is not :func:`empty `)
-        or if the search is finished.
+        All of these functions would return immediately if information is
+        pending (queue is not
+        :func:`empty `) or if the search
+        is finished.
         """
         return not self._seen_kork and self._queue.empty()
 
     def empty(self) -> bool:
         """
-        Checks if all information has been consumed.
+        Checks if all current information has been consumed.
 
         If the queue is empty, but the analysis is still ongoing, then further
         information can become available in the future.
-
-        If the queue is not empty, then the next call to
-        :func:`~chess.engine.AnalysisResult.get()` will return instantly.
         """
         return self._seen_kork or self._queue.qsize() <= self._posted_kork
 

From b93b2da69c47190d71b9628c7771c0686ab6faad Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 8 Jun 2022 23:57:28 +0200
Subject: [PATCH 308/613] Code golf async lambdas

---
 chess/engine.py | 38 ++++++++++++++------------------------
 1 file changed, 14 insertions(+), 24 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index efed7d89b..1ea47cd0b 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2696,6 +2696,10 @@ async def popen_xboard(command: Union[str, List[str]], *, setpgrp: bool = False,
     return transport, protocol
 
 
+async def _async(sync: Callable[[], T]) -> T:
+    return sync()
+
+
 class SimpleEngine:
     """
     Synchronous wrapper around a transport and engine protocol pair. Provides
@@ -2738,20 +2742,16 @@ def _not_shut_down(self) -> Generator[None, None, None]:
 
     @property
     def options(self) -> MutableMapping[str, Option]:
-        async def _get() -> MutableMapping[str, Option]:
-            return copy.copy(self.protocol.options)
-
         with self._not_shut_down():
-            future = asyncio.run_coroutine_threadsafe(_get(), self.protocol.loop)
+            coro = _async(lambda: copy.copy(self.protocol.options))
+            future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)
         return future.result()
 
     @property
     def id(self) -> Mapping[str, str]:
-        async def _get() -> Mapping[str, str]:
-            return self.protocol.id.copy()
-
         with self._not_shut_down():
-            future = asyncio.run_coroutine_threadsafe(_get(), self.protocol.loop)
+            coro = _async(lambda: self.protocol.id.copy())
+            future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)
         return future.result()
 
     def communicate(self, command_factory: Callable[[Protocol], BaseCommand[Protocol, T]]) -> T:
@@ -2877,20 +2877,16 @@ def __init__(self, simple_engine: SimpleEngine, inner: AnalysisResult) -> None:
 
     @property
     def info(self) -> InfoDict:
-        async def _get() -> InfoDict:
-            return self.inner.info.copy()
-
         with self.simple_engine._not_shut_down():
-            future = asyncio.run_coroutine_threadsafe(_get(), self.simple_engine.protocol.loop)
+            coro = _async(lambda: self.inner.info.copy())
+            future = asyncio.run_coroutine_threadsafe(coro, self.simple_engine.protocol.loop)
         return future.result()
 
     @property
     def multipv(self) -> List[InfoDict]:
-        async def _get() -> List[InfoDict]:
-            return [info.copy() for info in self.inner.multipv]
-
         with self.simple_engine._not_shut_down():
-            future = asyncio.run_coroutine_threadsafe(_get(), self.simple_engine.protocol.loop)
+            coro = _async(lambda: [info.copy() for info in self.inner.multipv])
+            future = asyncio.run_coroutine_threadsafe(coro, self.simple_engine.protocol.loop)
         return future.result()
 
     def stop(self) -> None:
@@ -2903,19 +2899,13 @@ def wait(self) -> BestMove:
         return future.result()
 
     def would_block(self) -> bool:
-        async def _would_block() -> bool:
-            return self.inner.would_block()
-
         with self.simple_engine._not_shut_down():
-            future = asyncio.run_coroutine_threadsafe(_would_block(), self.simple_engine.protocol.loop)
+            future = asyncio.run_coroutine_threadsafe(_async(self.inner.would_block), self.simple_engine.protocol.loop)
         return future.result()
 
     def empty(self) -> bool:
-        async def _empty() -> bool:
-            return self.inner.empty()
-
         with self.simple_engine._not_shut_down():
-            future = asyncio.run_coroutine_threadsafe(_empty(), self.simple_engine.protocol.loop)
+            future = asyncio.run_coroutine_threadsafe(_async(self.inner.empty), self.simple_engine.protocol.loop)
         return future.result()
 
     def get(self) -> InfoDict:

From d9cee54ef6c66a27a5b2d27ebff01d9da43a328e Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 9 Jun 2022 17:35:44 +0200
Subject: [PATCH 309/613] Fix would_block() docs (#889)

---
 chess/engine.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 1ea47cd0b..066221b98 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2574,7 +2574,7 @@ def stop(self) -> None:
             self._stop = None
 
     async def wait(self) -> BestMove:
-        """Waits until the analysis is complete (or stopped)."""
+        """Waits until the analysis is finished."""
         return await self._finished
 
     async def get(self) -> InfoDict:
@@ -2605,10 +2605,10 @@ def would_block(self) -> bool:
         """
         Checks if calling :func:`~chess.engine.AnalysisResult.get()`,
         calling :func:`~chess.engine.AnalysisResult.next()`,
-        calling :func:`~chess.engine.AnalysisResult.wait()`, or advancing the
-        iterator one step would require waiting for the engine.
+        or advancing the iterator one step would require waiting for the
+        engine.
 
-        All of these functions would return immediately if information is
+        These functions would return immediately if information is
         pending (queue is not
         :func:`empty `) or if the search
         is finished.

From 4376eb7d6eaf2bd217f56564073ed05469e49a73 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 11 Jun 2022 16:57:30 +0200
Subject: [PATCH 310/613] Fix recursive Crazyhouse move generation (fixes #893)

---
 chess/variant.py                | 27 ++++++++++++++-------------
 examples/perft/crazyhouse.perft |  7 +++++++
 2 files changed, 21 insertions(+), 13 deletions(-)

diff --git a/chess/variant.py b/chess/variant.py
index 9e586b79c..7494e20fa 100644
--- a/chess/variant.py
+++ b/chess/variant.py
@@ -829,31 +829,32 @@ class CrazyhousePocket:
     """A Crazyhouse pocket with a counter for each piece type."""
 
     def __init__(self, symbols: Iterable[str] = "") -> None:
-        self.pieces: Dict[chess.PieceType, int] = {}
+        self.reset()
         for symbol in symbols:
             self.add(chess.PIECE_SYMBOLS.index(symbol))
 
+    def reset(self) -> None:
+        """Clears the pocket."""
+        self._pieces = [None, 0, 0, 0, 0, 0, 0]
+
     def add(self, piece_type: chess.PieceType) -> None:
         """Adds a piece of the given type to this pocket."""
-        self.pieces[piece_type] = self.pieces.get(piece_type, 0) + 1
+        self._pieces[piece_type] += 1
 
     def remove(self, piece_type: chess.PieceType) -> None:
         """Removes a piece of the given type from this pocket."""
-        self.pieces[piece_type] -= 1
+        assert self._pieces[piece_type], f"cannot remove {chess.piece_symbol(piece_type)} from {self!r}"
+        self._pieces[piece_type] -= 1
 
     def count(self, piece_type: chess.PieceType) -> int:
         """Returns the number of pieces of the given type in the pocket."""
-        return self.pieces.get(piece_type, 0)
-
-    def reset(self) -> None:
-        """Clears the pocket."""
-        self.pieces.clear()
+        return self._pieces[piece_type]
 
     def __str__(self) -> str:
         return "".join(chess.piece_symbol(pt) * self.count(pt) for pt in reversed(chess.PIECE_TYPES))
 
     def __len__(self) -> int:
-        return sum(self.pieces.values())
+        return sum(self._pieces[1:])
 
     def __repr__(self) -> str:
         return f"CrazyhousePocket('{self}')"
@@ -861,7 +862,7 @@ def __repr__(self) -> str:
     def copy(self: CrazyhousePocketT) -> CrazyhousePocketT:
         """Returns a copy of this pocket."""
         pocket = type(self)()
-        pocket.pieces = copy.copy(self.pieces)
+        pocket._pieces = self._pieces[:]
         return pocket
 
 class CrazyhouseBoard(chess.Board):
@@ -959,9 +960,9 @@ def is_legal(self, move: chess.Move) -> bool:
             return super().is_legal(move)
 
     def generate_pseudo_legal_drops(self, to_mask: chess.Bitboard = chess.BB_ALL) -> Iterator[chess.Move]:
-        for to_square in chess.scan_forward(to_mask & ~self.occupied):
-            for pt, count in self.pockets[self.turn].pieces.items():
-                if count and (pt != chess.PAWN or not chess.BB_BACKRANKS & chess.BB_SQUARES[to_square]):
+        for pt in chess.PIECE_TYPES:
+            if self.pockets[self.turn].count(pt):
+                for to_square in chess.scan_forward(to_mask & ~self.occupied & (~chess.BB_BACKRANKS if pt == chess.PAWN else chess.BB_ALL)):
                     yield chess.Move(to_square, to_square, drop=pt)
 
     def generate_legal_drops(self, to_mask: chess.Bitboard = chess.BB_ALL) -> Iterator[chess.Move]:
diff --git a/examples/perft/crazyhouse.perft b/examples/perft/crazyhouse.perft
index cff0ba34a..42ccd68a6 100644
--- a/examples/perft/crazyhouse.perft
+++ b/examples/perft/crazyhouse.perft
@@ -23,3 +23,10 @@ perft 1 20
 perft 2 360
 perft 3 5445
 perft 4 132758
+
+id zh-midgame
+epd 2rn1b1r/1pp2n1p/B1PBk1pP/5p1P/P5p1/2P2RP1/RP1QNP2/1NBK4[QPp] w - -
+perft 1 99
+perft 2 3932
+perft 3 314782
+perft 4 10118606

From 0d90b5beb01b0ba2f5e9810fb4affa1d9fa6ae23 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 11 Jun 2022 17:10:31 +0200
Subject: [PATCH 311/613] Use -1 instead of None as invalid pocket._pieces

---
 chess/variant.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/variant.py b/chess/variant.py
index 7494e20fa..1384af166 100644
--- a/chess/variant.py
+++ b/chess/variant.py
@@ -835,7 +835,7 @@ def __init__(self, symbols: Iterable[str] = "") -> None:
 
     def reset(self) -> None:
         """Clears the pocket."""
-        self._pieces = [None, 0, 0, 0, 0, 0, 0]
+        self._pieces = [-1, 0, 0, 0, 0, 0, 0]
 
     def add(self, piece_type: chess.PieceType) -> None:
         """Adds a piece of the given type to this pocket."""

From 614d718be06d0b9ff471e70e66cd54c2cc6f5dfb Mon Sep 17 00:00:00 2001
From: John Hammond 
Date: Wed, 15 Jun 2022 22:33:03 -0500
Subject: [PATCH 312/613] Fill the black pawn with black color

This addresses #896 when rendering the board on a dark background.
---
 chess/svg.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/svg.py b/chess/svg.py
index 5a9cccc0a..9474550fe 100644
--- a/chess/svg.py
+++ b/chess/svg.py
@@ -36,7 +36,7 @@
     "b": """""",  # noqa: E501
     "k": """""",  # noqa: E501
     "n": """""",  # noqa: E501
-    "p": """""",  # noqa: E501
+    "p": """""",  # noqa: E501
     "q": """""",  # noqa: E501
     "r": """""",  # noqa: E501
     "B": """""",  # noqa: E501

From 3c902fde7a4744b285d933eb6116ec78a87871eb Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 17 Jun 2022 15:26:40 +0200
Subject: [PATCH 313/613] Prepare 1.9.2

---
 CHANGELOG.rst     | 13 +++++++++++++
 chess/__init__.py |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index f9910db9c..36564f56c 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,19 @@
 Changelog for python-chess
 ==========================
 
+New in v1.9.2
+-------------
+
+Bugfixes:
+
+* Fix recursive Crazyhouse move generation sometimes failing with
+  with ``RuntimeError``.
+* Fix rendering of black pawn SVG on dark background.
+
+New features:
+
+* Add ``chess.engine.AnalysisResult.would_block()``.
+
 New in v1.9.1
 -------------
 
diff --git a/chess/__init__.py b/chess/__init__.py
index 604fd31f4..6cddf13d8 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -27,7 +27,7 @@
 
 __email__ = "niklas.fiekas@backscattering.de"
 
-__version__ = "1.9.1"
+__version__ = "1.9.2"
 
 import collections
 import copy

From e88f28ab9f2be7e08a6cbf6ba2bc3858f867d4a8 Mon Sep 17 00:00:00 2001
From: laniakea64 
Date: Wed, 22 Jun 2022 16:07:44 -0400
Subject: [PATCH 314/613] pgn: Support all valid symbol continuation characters
 in tag names

---
 chess/pgn.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 85002140a..4ede56b60 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -93,9 +93,9 @@
 NAG_NOVELTY = 146
 
 
-TAG_REGEX = re.compile(r"^\[([A-Za-z0-9_]+)\s+\"([^\r]*)\"\]\s*$")
+TAG_REGEX = re.compile(r"^\[([A-Za-z0-9_+#=:-]+)\s+\"([^\r]*)\"\]\s*$")
 
-TAG_NAME_REGEX = re.compile(r"^[A-Za-z0-9_]+\Z")
+TAG_NAME_REGEX = re.compile(r"^[A-Za-z0-9_+#=:-]+\Z")
 
 MOVETEXT_REGEX = re.compile(r"""
     (

From cd6bbb1bbe9c8d6b7e8ec7765f89c47872f210e8 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 23 Jun 2022 22:33:42 +0200
Subject: [PATCH 315/613] Test special characters in PGN tag names

---
 chess/pgn.py |  2 +-
 test.py      | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 4ede56b60..130526ed2 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -934,7 +934,7 @@ def __setitem__(self, key: str, value: str) -> None:
         if key in TAG_ROSTER:
             self._tag_roster[key] = value
         elif not TAG_NAME_REGEX.match(key):
-            raise ValueError(f"non-alphanumeric pgn header tag: {key!r}")
+            raise ValueError(f"invalid pgn header tag: {key!r}")
         elif "\n" in value or "\r" in value:
             raise ValueError(f"line break in pgn header {key}: {value!r}")
         else:
diff --git a/test.py b/test.py
index fdaaa6290..7e5bacfa1 100755
--- a/test.py
+++ b/test.py
@@ -2252,6 +2252,16 @@ def test_header_with_paren(self):
         self.assertEqual(game.headers["Opening"], "St. George (Baker) defense")
         self.assertEqual(game.end().board(), chess.Board("8/2p2k2/1pR3p1/1P1P4/p1P2P2/P4K2/8/5r2 w - - 7 78"))
 
+    def test_special_tag_names(self):
+        pgn = io.StringIO("""[BlackType: "program"]""")
+        game = chess.pgn.read_game(pgn)
+        self.assertEqual(game.headers["BlackType:"], "program")
+
+        with self.assertRaises(ValueError):
+            game.headers["~"] = "foo"
+
+        game.headers["Equals="] = "bar"
+
     def test_chess960_without_fen(self):
         pgn = io.StringIO(textwrap.dedent("""\
             [Variant "Chess960"]

From 43dc84ad41b78997a6873e9855d2d4fb57d67735 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 24 Jun 2022 20:43:29 +0200
Subject: [PATCH 316/613] =?UTF-8?q?Tweak=20wording=20of=20feature=20nps=3D?=
 =?UTF-8?q?=3F=20warning?=

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 066221b98..5194247f6 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2135,7 +2135,7 @@ def start(self, engine: XBoardProtocol) -> None:
                         raise EngineError("xboard does not support mixing node limits with time limits")
 
                     if "nps" not in engine.features:
-                        LOGGER.warning("%s: Engine did not declare explicit support for node limits (feature nps=?)")
+                        LOGGER.warning("%s: Engine did not explicitly declare support for node limits (feature nps=?)")
                     elif not engine.features["nps"]:
                         raise EngineError("xboard engine does not support node limits (feature nps=0)")
 

From 77794ce08d7c59a663bf19b7e41c69be9ac3a965 Mon Sep 17 00:00:00 2001
From: laniakea64 
Date: Thu, 7 Jul 2022 16:12:07 -0400
Subject: [PATCH 317/613] pgn: Improve validation of symbol tokens for tag
 names

---
 chess/pgn.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 130526ed2..ec0cbf1fd 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -93,9 +93,9 @@
 NAG_NOVELTY = 146
 
 
-TAG_REGEX = re.compile(r"^\[([A-Za-z0-9_+#=:-]+)\s+\"([^\r]*)\"\]\s*$")
+TAG_REGEX = re.compile(r"^\[([A-Za-z0-9][A-Za-z0-9_+#=:-]{,254})\s+\"([^\r]*)\"\]\s*$")
 
-TAG_NAME_REGEX = re.compile(r"^[A-Za-z0-9_+#=:-]+\Z")
+TAG_NAME_REGEX = re.compile(r"^[A-Za-z0-9][A-Za-z0-9_+#=:-]{,254}\Z")
 
 MOVETEXT_REGEX = re.compile(r"""
     (

From 865e4674a510d2e066c683044d09962f032f8512 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 9 Jul 2022 12:12:21 +0200
Subject: [PATCH 318/613] Disregard specified maximum PGN tag length

---
 chess/pgn.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index ec0cbf1fd..adecce1c7 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -93,9 +93,9 @@
 NAG_NOVELTY = 146
 
 
-TAG_REGEX = re.compile(r"^\[([A-Za-z0-9][A-Za-z0-9_+#=:-]{,254})\s+\"([^\r]*)\"\]\s*$")
+TAG_REGEX = re.compile(r"^\[([A-Za-z0-9][A-Za-z0-9_+#=:-]*)\s+\"([^\r]*)\"\]\s*$")
 
-TAG_NAME_REGEX = re.compile(r"^[A-Za-z0-9][A-Za-z0-9_+#=:-]{,254}\Z")
+TAG_NAME_REGEX = re.compile(r"^[A-Za-z0-9][A-Za-z0-9_+#=:-]*\Z")
 
 MOVETEXT_REGEX = re.compile(r"""
     (

From 835c520cda91337efbfad55b74c41adcdfa21645 Mon Sep 17 00:00:00 2001
From: laniakea64 
Date: Sat, 9 Jul 2022 16:51:16 -0400
Subject: [PATCH 319/613] pgn: Skip over invalid or malformed headers

---
 chess/pgn.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index adecce1c7..2257b8285 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -1538,7 +1538,9 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any:
                 if unmanaged_headers is not None:
                     unmanaged_headers[tag_match.group(1)] = tag_match.group(2)
             else:
-                break
+                # Ignore invalid or malformed headers.
+                line = handle.readline()
+                continue
 
         line = handle.readline()
 

From ec50de5566d73704869fcf2e8f1c4e3a7e0e770e Mon Sep 17 00:00:00 2001
From: DonLarry 
Date: Wed, 20 Jul 2022 20:19:27 -0400
Subject: [PATCH 320/613] Adding flipped option to unicode representation

---
 chess/__init__.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 6cddf13d8..2f00a38b8 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -1221,7 +1221,7 @@ def __str__(self) -> str:
 
         return "".join(builder)
 
-    def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_square: str = "⭘") -> str:
+    def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_square: str = "⭘", flipped:bool = False) -> str:
         """
         Returns a string representation of the board with Unicode pieces.
         Useful for pretty-printing to a terminal.
@@ -1229,6 +1229,11 @@ def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_sq
         :param invert_color: Invert color of the Unicode pieces.
         :param borders: Show borders and a coordinate margin.
         """
+        board = self.copy()
+        if flipped:
+          board.apply_transform(flip_vertical)
+          board.apply_transform(flip_horizontal)
+
         builder = []
         for rank_index in range(7, -1, -1):
             if borders:
@@ -1247,7 +1252,7 @@ def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_sq
                 elif file_index > 0:
                     builder.append(" ")
 
-                piece = self.piece_at(square_index)
+                piece = board.piece_at(square_index)
 
                 if piece:
                     builder.append(piece.unicode_symbol(invert_color=invert_color))

From aa0a04f37da9339b7d3a983aecbe9c97935fc0d3 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 22 Jul 2022 11:09:43 +0200
Subject: [PATCH 321/613] Implement Antichess insufficient material with
 knights

---
 chess/variant.py | 27 ++++++++++++++++++---------
 test.py          |  5 +++++
 2 files changed, 23 insertions(+), 9 deletions(-)

diff --git a/chess/variant.py b/chess/variant.py
index 1384af166..3fec62c3c 100644
--- a/chess/variant.py
+++ b/chess/variant.py
@@ -85,16 +85,25 @@ def is_variant_draw(self) -> bool:
             return self.is_stalemate() and self._material_balance() == 0
 
     def has_insufficient_material(self, color: chess.Color) -> bool:
-        if self.occupied != self.bishops:
+        if not self.occupied_co[color]:
+            return False
+        elif not self.occupied_co[not color]:
+            return True
+        elif self.occupied == self.bishops:
+            # In a position with only bishops, check if all our bishops can be
+            # captured.
+            we_some_on_light = bool(self.occupied_co[color] & chess.BB_LIGHT_SQUARES)
+            we_some_on_dark = bool(self.occupied_co[color] & chess.BB_DARK_SQUARES)
+            they_all_on_dark = not (self.occupied_co[not color] & chess.BB_LIGHT_SQUARES)
+            they_all_on_light = not (self.occupied_co[not color] & chess.BB_DARK_SQUARES)
+            return (we_some_on_light and they_all_on_dark) or (we_some_on_dark and they_all_on_light)
+        elif self.occupied == self.knights and chess.popcount(self.knights) == 2:
+            return (
+                self.turn == color ^
+                bool(self.occupied_co[chess.WHITE] & chess.BB_LIGHT_SQUARES) ^
+                bool(self.occupied_co[chess.BLACK] & chess.BB_DARK_SQUARES))
+        else:
             return False
-
-        # In a position with only bishops, check if all our bishops can be
-        # captured.
-        we_some_on_light = bool(self.occupied_co[color] & chess.BB_LIGHT_SQUARES)
-        we_some_on_dark = bool(self.occupied_co[color] & chess.BB_DARK_SQUARES)
-        they_all_on_dark = not (self.occupied_co[not color] & chess.BB_LIGHT_SQUARES)
-        they_all_on_light = not (self.occupied_co[not color] & chess.BB_DARK_SQUARES)
-        return (we_some_on_light and they_all_on_dark) or (we_some_on_dark and they_all_on_light)
 
     def generate_pseudo_legal_moves(self, from_mask: chess.Bitboard = chess.BB_ALL, to_mask: chess.Bitboard = chess.BB_ALL) -> Iterator[chess.Move]:
         for move in super().generate_pseudo_legal_moves(from_mask, to_mask):
diff --git a/test.py b/test.py
index 7e5bacfa1..9e9a4c1d5 100755
--- a/test.py
+++ b/test.py
@@ -561,6 +561,11 @@ def _check(board, white, black):
         _check(chess.variant.GiveawayBoard("8/8/8/6b1/8/3B4/4B3/5B2 w - - 0 1"), True, True)
         _check(chess.variant.GiveawayBoard("8/8/5b2/8/8/3B4/3B4/8 w - - 0 1"), True, False)
         _check(chess.variant.SuicideBoard("8/5p2/5P2/8/3B4/1bB5/8/8 b - - 0 1"), false_negative, false_negative)
+        _check(chess.variant.AntichessBoard("8/8/8/1n2N3/8/8/8/8 w - - 0 32"), True, False)
+        _check(chess.variant.AntichessBoard("8/3N4/8/1n6/8/8/8/8 b - - 1 32"), True, False)
+        _check(chess.variant.AntichessBoard("6n1/8/8/4N3/8/8/8/8 b - - 0 27"), False, True)
+        _check(chess.variant.AntichessBoard("8/8/5n2/4N3/8/8/8/8 w - - 1 28"), False, True)
+        _check(chess.variant.AntichessBoard("8/3n4/8/8/8/8/8/8 w - - 0 29"), False, True)
 
         _check(chess.variant.KingOfTheHillBoard("8/5k2/8/8/8/8/3K4/8 w - - 0 1"), False, False)
 

From 5c054874619e90b8315a070aca5e46d2775cd8de Mon Sep 17 00:00:00 2001
From: DonLarry 
Date: Thu, 28 Jul 2022 18:59:54 -0400
Subject: [PATCH 322/613] Applying suggestions

---
 chess/__init__.py | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 2f00a38b8..199542491 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -1221,7 +1221,7 @@ def __str__(self) -> str:
 
         return "".join(builder)
 
-    def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_square: str = "⭘", flipped:bool = False) -> str:
+    def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_square: str = "⭘", orientation:Color = WHITE) -> str:
         """
         Returns a string representation of the board with Unicode pieces.
         Useful for pretty-printing to a terminal.
@@ -1230,12 +1230,9 @@ def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_sq
         :param borders: Show borders and a coordinate margin.
         """
         board = self.copy()
-        if flipped:
-          board.apply_transform(flip_vertical)
-          board.apply_transform(flip_horizontal)
-
         builder = []
-        for rank_index in range(7, -1, -1):
+        indexes = range(7, -1, -1) if orientation else range(8)
+        for rank_index in indexes:
             if borders:
                 builder.append("  ")
                 builder.append("-" * 17)
@@ -1262,14 +1259,15 @@ def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_sq
             if borders:
                 builder.append("|")
 
-            if borders or rank_index > 0:
+            if borders or (rank_index > 0 and orientation) or (rank_index < 7 and not orientation):
                 builder.append("\n")
 
         if borders:
             builder.append("  ")
             builder.append("-" * 17)
             builder.append("\n")
-            builder.append("   a b c d e f g h")
+            letters = "a b c d e f g h" if orientation else "h g f e d c b a"
+            builder.append("   " + letters)
 
         return "".join(builder)
 

From 1909f1c42b3941c89db46b41dce3a55980956246 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 29 Jul 2022 08:43:36 +0200
Subject: [PATCH 323/613] Code golf board.unicode()

---
 chess/__init__.py | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 199542491..6a98e2762 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -1229,10 +1229,8 @@ def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_sq
         :param invert_color: Invert color of the Unicode pieces.
         :param borders: Show borders and a coordinate margin.
         """
-        board = self.copy()
         builder = []
-        indexes = range(7, -1, -1) if orientation else range(8)
-        for rank_index in indexes:
+        for rank_index in (range(7, -1, -1) if orientation else range(8)):
             if borders:
                 builder.append("  ")
                 builder.append("-" * 17)
@@ -1249,7 +1247,7 @@ def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_sq
                 elif file_index > 0:
                     builder.append(" ")
 
-                piece = board.piece_at(square_index)
+                piece = self.piece_at(square_index)
 
                 if piece:
                     builder.append(piece.unicode_symbol(invert_color=invert_color))
@@ -1259,7 +1257,7 @@ def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_sq
             if borders:
                 builder.append("|")
 
-            if borders or (rank_index > 0 and orientation) or (rank_index < 7 and not orientation):
+            if borders or (rank_index > 0 if orientation else rank_index < 7):
                 builder.append("\n")
 
         if borders:

From 3b412c53504efa4e36a75e13755244d8c3f4bd85 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 29 Jul 2022 08:43:48 +0200
Subject: [PATCH 324/613] Fix order of files on flipped unicode board

---
 chess/__init__.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 6a98e2762..b8198762b 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -1239,12 +1239,12 @@ def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_sq
                 builder.append(RANK_NAMES[rank_index])
                 builder.append(" ")
 
-            for file_index in range(8):
+            for i, file_index in enumerate(range(8) if orientation else range(7, -1, -1)):
                 square_index = square(file_index, rank_index)
 
                 if borders:
                     builder.append("|")
-                elif file_index > 0:
+                elif i > 0:
                     builder.append(" ")
 
                 piece = self.piece_at(square_index)

From a19cf1e5307fef1d399f2c558260363573ff817f Mon Sep 17 00:00:00 2001
From: John Doknjas <32089502+johndoknjas@users.noreply.github.com>
Date: Thu, 28 Jul 2022 23:52:54 -0700
Subject: [PATCH 325/613] Update docs (#911)

---
 chess/pgn.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/chess/pgn.py b/chess/pgn.py
index 2257b8285..fa99be9f6 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -1470,6 +1470,10 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any:
 
     >>> pgn = open("data/pgn/kasparov-deep-blue-1997.pgn", encoding="utf-8")
 
+    If you get a UnicodeDecodeError, including the following parameters might help:
+
+    >>> pgn = open("data/pgn/kasparov-deep-blue-1997.pgn", 'r', errors='replace')
+
     Use :class:`~io.StringIO` to parse games from a string.
 
     >>> import io

From cff414bf33d1dc9468822995af8c9f143ac011f1 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 29 Jul 2022 09:01:52 +0200
Subject: [PATCH 326/613] Enable intersphinx

---
 docs/conf.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/docs/conf.py b/docs/conf.py
index 526150026..1e00cd0d1 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -15,8 +15,11 @@
 import chess
 
 # Autodoc.
-extensions = ["sphinx.ext.autodoc", "sphinx.ext.viewcode"]
+extensions = ["sphinx.ext.autodoc", "sphinx.ext.viewcode", "sphinx.ext.intersphinx"]
 autodoc_member_order = "bysource"
+intersphinx_mapping = {
+    "python": ("https://docs.python.org/3", None),
+}
 
 # The suffix of source filenames.
 source_suffix = ".rst"

From 2379c55bcadd6ef9f2acb2e2f7f2476094be5ec1 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 29 Jul 2022 09:02:27 +0200
Subject: [PATCH 327/613] Link open() docs rather than recommendeing replace

---
 chess/pgn.py | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index fa99be9f6..da97866c3 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -1466,14 +1466,11 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any:
     By using text mode, the parser does not need to handle encodings. It is the
     caller's responsibility to open the file with the correct encoding.
     PGN files are usually ASCII or UTF-8 encoded, sometimes with BOM (which
-    this parser automatically ignores).
+    this parser automatically ignores). See :func:`open` for options to
+    deal with encoding errors.
 
     >>> pgn = open("data/pgn/kasparov-deep-blue-1997.pgn", encoding="utf-8")
 
-    If you get a UnicodeDecodeError, including the following parameters might help:
-
-    >>> pgn = open("data/pgn/kasparov-deep-blue-1997.pgn", 'r', errors='replace')
-
     Use :class:`~io.StringIO` to parse games from a string.
 
     >>> import io

From 9f41b049b0266167d2b38c469cc83993f3d5e431 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 25 Apr 2022 14:47:49 +0200
Subject: [PATCH 328/613] Move required Python to installation section

---
 README.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.rst b/README.rst
index 7872edae3..3fb94920e 100644
--- a/README.rst
+++ b/README.rst
@@ -59,7 +59,7 @@ python-chess:
 Installing
 ----------
 
-Download and install the latest release:
+Requires Python 3.7+. Download and install the latest release:
 
 ::
 
@@ -81,7 +81,7 @@ Download and install the latest release:
 Features
 --------
 
-* Supports Python 3.7+. Includes mypy typings.
+* Includes mypy typings.
 
 * IPython/Jupyter Notebook integration.
   `SVG rendering docs `_.

From 9d68cef4f448c148d70102886d73844868f2df75 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 11 Aug 2022 14:36:23 +0200
Subject: [PATCH 329/613] Link python-chess-engine-extensions (closes #361,
 closes #915)

---
 README.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.rst b/README.rst
index 3fb94920e..8c85015e7 100644
--- a/README.rst
+++ b/README.rst
@@ -332,6 +332,7 @@ If you like, share interesting things you are using python-chess for, for exampl
 |     :target: https://www.pettingzoo.ml/classic/chess                                                 | A multi-agent reinforcement learning environment                                        |
 +------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+
 
+* extensions to build engines (search and evaluation) – https://github.com/Mk-Chan/python-chess-engine-extensions
 * a stand-alone chess computer based on DGT board – http://www.picochess.org/
 * a bridge between Lichess API and chess engines – https://github.com/careless25/lichess-bot
 * a command-line PGN annotator – https://github.com/rpdelaney/python-chess-annotator

From cb65881bbd9489d1ef525cf14fedbe07a1fcf6ec Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 16 Sep 2022 14:23:26 +0200
Subject: [PATCH 330/613] Prepare 1.9.3

---
 CHANGELOG.rst     | 16 ++++++++++++++++
 chess/__init__.py |  4 ++--
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 36564f56c..6e543bcae 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,22 @@
 Changelog for python-chess
 ==========================
 
+New in v1.9.3
+-------------
+
+Bugfixes:
+
+* Fix some valid characters were not accepted in PGN tag names.
+
+Changes:
+
+* Skip over syntactically invalid PGN tags.
+* Detect Antichess insufficient material with two opposing knights.
+
+New features:
+
+* Add `chess.Board.unicode(..., orientation=chess.WHITE)`.
+
 New in v1.9.2
 -------------
 
diff --git a/chess/__init__.py b/chess/__init__.py
index b8198762b..c83a24c59 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -27,7 +27,7 @@
 
 __email__ = "niklas.fiekas@backscattering.de"
 
-__version__ = "1.9.2"
+__version__ = "1.9.3"
 
 import collections
 import copy
@@ -1221,7 +1221,7 @@ def __str__(self) -> str:
 
         return "".join(builder)
 
-    def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_square: str = "⭘", orientation:Color = WHITE) -> str:
+    def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_square: str = "⭘", orientation: Color = WHITE) -> str:
         """
         Returns a string representation of the board with Unicode pieces.
         Useful for pretty-printing to a terminal.

From acdadb112b1d2fd1f1693f41bcd49c28ef2ed88a Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 16 Sep 2022 14:27:46 +0200
Subject: [PATCH 331/613] Fix rst in changelog

---
 CHANGELOG.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 6e543bcae..1e51fee3f 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -15,7 +15,7 @@ Changes:
 
 New features:
 
-* Add `chess.Board.unicode(..., orientation=chess.WHITE)`.
+* Add ``chess.Board.unicode(..., orientation=chess.WHITE)``.
 
 New in v1.9.2
 -------------

From da82a9ba72e7756171a6ff1ba19b97a94aeb9308 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 16 Sep 2022 14:29:55 +0200
Subject: [PATCH 332/613] Subscribe to github-actions updates

---
 .github/dependabot.yml | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 .github/dependabot.yml

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 000000000..620ae570c
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,6 @@
+version: 3
+updates:
+  - package-ecosystem: github-actions
+    directory: '/'
+    schedule:
+      interval: monthly

From 82a608c9b75c5af1ddf7e360ee2aa22d9bda00b9 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 16 Sep 2022 14:41:00 +0200
Subject: [PATCH 333/613] Fix dependabot.yml version

---
 .github/dependabot.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 620ae570c..0d23a8f03 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -1,4 +1,4 @@
-version: 3
+version: 2
 updates:
   - package-ecosystem: github-actions
     directory: '/'

From 8350f9da1af68f0aeeb1bb7569b30caeb99828c3 Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Fri, 16 Sep 2022 12:42:06 +0000
Subject: [PATCH 334/613] Bump github/codeql-action from 1 to 2

Bumps [github/codeql-action](https://github.com/github/codeql-action) from 1 to 2.
- [Release notes](https://github.com/github/codeql-action/releases)
- [Changelog](https://github.com/github/codeql-action/blob/main/CHANGELOG.md)
- [Commits](https://github.com/github/codeql-action/compare/v1...v2)

---
updated-dependencies:
- dependency-name: github/codeql-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] 
---
 .github/workflows/codeql.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index a1b9e1b55..a37e82933 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -12,7 +12,7 @@ jobs:
       security-events: write
     steps:
       - uses: actions/checkout@v3
-      - uses: github/codeql-action/init@v1
+      - uses: github/codeql-action/init@v2
         with:
           languages: python
-      - uses: github/codeql-action/analyze@v1
+      - uses: github/codeql-action/analyze@v2

From 9b40f8a127de56a2fbdee71aefe77e9c0402cce2 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 17 Sep 2022 13:27:21 +0200
Subject: [PATCH 335/613] Update readthedocs.yml

---
 .readthedocs.yml | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/.readthedocs.yml b/.readthedocs.yml
index 11760dd7d..dbe71809a 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -1,7 +1,15 @@
-version: 1
+version: 2
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.10"
+
+sphinx:
+  configuration: docs/conf.py
+
 python:
-  version: 3.8
   install:
+    - method: pip
+      path: .
     - requirements: docs/requirements.txt
-    - method: setuptools
-      path: docs

From 3476c7306361c2ef481ac6c70204b5b18577ce34 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 17 Sep 2022 13:29:44 +0200
Subject: [PATCH 336/613] Try Sphinx 4.5.0

---
 docs/requirements.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/requirements.txt b/docs/requirements.txt
index 5152367fe..c8cc7c404 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1 @@
-Sphinx==3.5.4
+Sphinx==4.5.0

From 80c718489e2bdbd597f6e2c5c02663c4c9e0265d Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 17 Sep 2022 13:32:06 +0200
Subject: [PATCH 337/613] Try Sphinx 5.1.1

---
 docs/conf.py          | 10 +++++-----
 docs/requirements.txt |  2 +-
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/docs/conf.py b/docs/conf.py
index 1e00cd0d1..bde54010b 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,6 +1,10 @@
 import sys
 import os
 
+# Import the chess module.
+sys.path.insert(0, os.path.abspath(".."))
+import chess
+
 # Do not resolve these.
 autodoc_type_aliases = {
     "Square": "chess.Square",
@@ -10,10 +14,6 @@
     "IntoSquareSet": "chess.IntoSquareSet",
 }
 
-# Import the chess module.
-sys.path.insert(0, os.path.abspath(".."))
-import chess
-
 # Autodoc.
 extensions = ["sphinx.ext.autodoc", "sphinx.ext.viewcode", "sphinx.ext.intersphinx"]
 autodoc_member_order = "bysource"
@@ -29,7 +29,7 @@
 
 # General information about the project.
 project = "python-chess"
-copyright = "2014–2021, Niklas Fiekas"
+copyright = "2014–2022, Niklas Fiekas"
 
 # The version.
 version = chess.__version__
diff --git a/docs/requirements.txt b/docs/requirements.txt
index c8cc7c404..baa05d40d 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1 @@
-Sphinx==4.5.0
+Sphinx==5.1.1

From 5498161b4de41c4b7cd31985dcaaee9457f909d0 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 5 Oct 2022 20:41:10 +0200
Subject: [PATCH 338/613] Add known dates to changelog entries (closes #922)

---
 CHANGELOG-OLD.rst | 342 +++++++++++++++++++++++-----------------------
 CHANGELOG.rst     |  80 +++++------
 2 files changed, 211 insertions(+), 211 deletions(-)

diff --git a/CHANGELOG-OLD.rst b/CHANGELOG-OLD.rst
index 6a9f5facf..bebcba4d0 100644
--- a/CHANGELOG-OLD.rst
+++ b/CHANGELOG-OLD.rst
@@ -1,8 +1,8 @@
 Old Changelog for python-chess up to 1.0.0
 ==========================================
 
-New in v1.0.0
--------------
+New in v1.0.0 (24th Sep 2020)
+-----------------------------
 
 Changes:
 
@@ -38,8 +38,8 @@ New features:
 * Added `chess.Board.apply_mirror()`.
 * Added `chess.svg.board(..., colors)`, to allow overriding the default theme.
 
-New in v0.31.4
---------------
+New in v0.31.4 (9th Aug 2020)
+-----------------------------
 
 Bugfixes:
 
@@ -53,8 +53,8 @@ New features:
 
 * Finish typing and declare support for mypy.
 
-New in v0.31.3
---------------
+New in v0.31.3 (18th Jul 2020)
+------------------------------
 
 Bugfixes:
 
@@ -84,8 +84,8 @@ New features:
   `[%eval ...]` PGN annotations.
 * Added `SquareSet.ray(a, b)` and `SquareSet.between(a, b)`.
 
-New in v0.31.2
---------------
+New in v0.31.2 (2nd Jun 2020)
+-----------------------------
 
 Bugfixes:
 
@@ -99,8 +99,8 @@ Changes:
   `one_king`.
 * Take advantage of `int.bit_count()` coming in Python 3.10.
 
-New in v0.31.1
---------------
+New in v0.31.1 (5th May 2020)
+-----------------------------
 
 Bugfixes:
 
@@ -122,8 +122,8 @@ Features:
 
 * Added `Board.find_move()`, useful for finding moves that match human input.
 
-New in v0.31.0
---------------
+New in v0.31.0 (21st Apr 2020)
+------------------------------
 
 Changes:
 
@@ -160,8 +160,8 @@ Features:
 * Added `empty_square` parameter for `chess.Board.unicode()` with better
   aligned default (⭘).
 
-New in v0.30.1
---------------
+New in v0.30.1 (18th Jan 2020)
+------------------------------
 
 Changes:
 
@@ -187,8 +187,8 @@ Features:
 * Added `board.checkers()`, returning a set of squares with the pieces giving
   check.
 
-New in v0.30.0
---------------
+New in v0.30.0 (1st Jan 2020)
+-----------------------------
 
 Changes:
 
@@ -211,8 +211,8 @@ Features:
   when running on Python 3.9+ and Linux 5.3+.
 * Add `chess.Board.san_and_push()`.
 
-New in v0.29.0
---------------
+New in v0.29.0 (2nd Dec 2019)
+-----------------------------
 
 Changes:
 
@@ -235,8 +235,8 @@ Features:
 
 * Support `wdl` in UCI info (usually activated with `UCI_ShowWDL`).
 
-New in v0.28.3
---------------
+New in v0.28.3 (3rd Sep 2019)
+-----------------------------
 
 Bugfixes:
 
@@ -244,8 +244,8 @@ Bugfixes:
 * Handle self-reported errors by XBoard engines "Error: ..." or
   "Illegal move: ...".
 
-New in v0.28.2
---------------
+New in v0.28.2 (25th Jul 2019)
+------------------------------
 
 Bugfixes:
 
@@ -257,8 +257,8 @@ Changes:
 * `chess.Move.from_uci()` no longer accepts moves from and to the same square,
   for example `a1a1`. `0000` is now the only valid null move notation.
 
-New in v0.28.1
---------------
+New in v0.28.1 (25th May 2019)
+------------------------------
 
 Bugfixes:
 
@@ -273,8 +273,8 @@ Changes:
 * Added `chess.engine.InfoDict` class with typed shorthands for common keys.
 * Support `[Variant "3-check"]` (from chess.com PGNs).
 
-New in v0.28.0
---------------
+New in v0.28.0 (20th May 2019)
+------------------------------
 
 Changes:
 
@@ -314,8 +314,8 @@ New features:
 * `chess.engine.EngineProtocol` and constructors now optionally take
   an explicit `loop` argument.
 
-New in v0.27.3
---------------
+New in v0.27.3 (21st Mar 2019)
+------------------------------
 
 Changes:
 
@@ -343,8 +343,8 @@ New features:
   `chess.pgn.GameNode.dangling_node()` to simplify subclassing `GameNode`.
 * `EngineProtocol.communicate()` is now also available in the synchronous API.
 
-New in v0.27.2
---------------
+New in v0.27.2 (16th Mar 2019)
+------------------------------
 
 Bugfixes:
 
@@ -352,16 +352,16 @@ Bugfixes:
   intended when using `chess.engine.Limit.time`, and searching 100 times more
   nodes than intended when using `chess.engine.Limit.nodes`. Thanks @pascalgeo.
 
-New in v0.27.1
---------------
+New in v0.27.1 (15th Mar 2019)
+------------------------------
 
 Bugfixes:
 
 * `chess.engine.XBoardProtocol.play()` was raising `KeyError` when using time
   controls with increment or remaining moves. Thanks @pascalgeo.
 
-New in v0.27.0
---------------
+New in v0.27.0 (14th Mar 2019)
+------------------------------
 
 This is the second **release candidate for python-chess 1.0**. If you see the
 need for breaking changes, please speak up now!
@@ -389,8 +389,8 @@ New features:
 * Document that `chess.engine.EngineProtocol` is compatible with
   AsyncSSH 1.16.0.
 
-New in v0.26.0
---------------
+New in v0.26.0 (19th Feb 2019)
+------------------------------
 
 This is the first **release candidate for python-chess 1.0**. If you see the
 need for breaking changes, please speak up now!
@@ -414,16 +414,16 @@ Bugfixes:
 
 * Properly handle delayed engine errors, for example unsupported options.
 
-New in v0.25.1
---------------
+New in v0.25.1 (24th Jan 2019)
+------------------------------
 
 Bugfixes:
 
 * `chess.engine` did not correctly handle Windows-style line endings.
   Thanks @Bstylestuff.
 
-New in v0.25.0
---------------
+New in v0.25.0 (18th Jan 2019)
+------------------------------
 
 New features:
 
@@ -443,8 +443,8 @@ Changes:
 * `chess.pgn.read_game()` now ignores BOM at the start of the stream.
 * Removed deprecated items.
 
-New in v0.24.2
---------------
+New in v0.24.2 (5th Jan 2019)
+-----------------------------
 
 Bugfixes:
 
@@ -469,8 +469,8 @@ Features:
 
 * Added `chess.pgn.BaseVisitor.visit_board()` and `chess.pgn.BoardCreator`.
 
-New in v0.24.1, v0.23.11
-------------------------
+New in v0.24.1, v0.23.11 (7th Dec 2018)
+---------------------------------------
 
 Bugfixes:
 
@@ -479,8 +479,8 @@ Bugfixes:
 * `chess.pgn.GameNode.uci()` was always raising an exception.
   Also included in v0.24.0.
 
-New in v0.24.0
---------------
+New in v0.24.0 (3rd Dec 2018)
+-----------------------------
 
 This release **drops support for Python 2**. The *0.23.x* branch will be
 maintained for one more month.
@@ -555,16 +555,16 @@ New features:
   The corresponding `end_game()` or `end_variation()` will still be called.
 * Added `chess.svg.MARGIN`.
 
-New in v0.23.10
----------------
+New in v0.23.10 (31st Oct 2018)
+-------------------------------
 
 Bugfixes:
 
 * `chess.SquareSet` now correctly handles negative masks. Thanks @hasnul.
 * `chess.pgn` now accepts `[Variant "chess 960"]` (with the space).
 
-New in v0.23.9
---------------
+New in v0.23.9 (4th Jul 2018)
+-----------------------------
 
 Changes:
 
@@ -572,16 +572,16 @@ Changes:
   repetition no longer needs to occur on consecutive alternating moves.
   Thanks @LegionMammal978.
 
-New in v0.23.8
---------------
+New in v0.23.8 (1st Jul 2018)
+-----------------------------
 
 Bugfixes:
 
 * `chess.syzygy`: Correctly initialize wide DTZ map for experimental 7 piece
   table KRBBPvKQ.
 
-New in v0.23.7
---------------
+New in v0.23.7 (26th Jun 2018)
+------------------------------
 
 Bugfixes:
 
@@ -604,8 +604,8 @@ New features:
 
 * Added `Board.root()`.
 
-New in v0.23.6
---------------
+New in v0.23.6 (25th May 2018)
+------------------------------
 
 Bugfixes:
 
@@ -628,8 +628,8 @@ New features:
 
 * Added `polyglot.MemoryMappedReader.get(board, default=None)`.
 
-New in v0.23.5
---------------
+New in v0.23.5 (11th May 2018)
+------------------------------
 
 Bugfixes:
 
@@ -642,8 +642,8 @@ Changes:
 * Better error messages when parsing info from UCI engine fails.
 * Better error message for `b.set_board_fen(b.fen())`.
 
-New in v0.23.4
---------------
+New in v0.23.4 (29th Apr 2018)
+------------------------------
 
 New features:
 
@@ -655,15 +655,15 @@ Bugfixes:
 * Implement 16 bit DTZ mapping, which is required for some of the longest
   7 piece endgames.
 
-New in v0.23.3
---------------
+New in v0.23.3 (21st Apr 2018)
+------------------------------
 
 New features:
 
 * XBoard: Support `variant`. Thanks gbtami.
 
-New in v0.23.2
---------------
+New in v0.23.2 (20th Apr 2018)
+------------------------------
 
 Bugfixes:
 
@@ -671,16 +671,16 @@ Bugfixes:
 * XBoard: Ignore debug output prefixed with `#`. Thanks Dan Ravensloft and
   Manik Charan.
 
-New in v0.23.1
---------------
+New in v0.23.1 (13th Apr 2018)
+------------------------------
 
 Bugfixes:
 
 * Fix DTZ in case of mate in 1. This is a cosmetic fix, as the previous
   behavior was only off by one (which is allowed by design).
 
-New in v0.23.0
---------------
+New in v0.23.0 (8th Apr 2018)
+-----------------------------
 
 New features:
 
@@ -694,8 +694,8 @@ Changes:
 * The undocumented constructors of `chess.syzygy.WdlTable` and
   `chess.syzygy.DtzTable` have been changed.
 
-New in v0.22.2
---------------
+New in v0.22.2 (15th Mar 2018)
+------------------------------
 
 Bugfixes:
 
@@ -714,8 +714,8 @@ New features:
 
 * Added `Board.lan()` for long algebraic notation.
 
-New in v0.22.1
---------------
+New in v0.22.1 (1st Jan 2018)
+-----------------------------
 
 New features:
 
@@ -734,8 +734,8 @@ Bugfixes:
 * `chess.pgn`: Allow games without movetext.
 * XBoard: Fixed draw handling.
 
-New in v0.22.0
---------------
+New in v0.22.0 (20th Nov 2017)
+------------------------------
 
 Changes:
 
@@ -749,16 +749,16 @@ New features:
 
 * XBoard: Added `DrawHandler`.
 
-New in v0.21.2
---------------
+New in v0.21.2 (17th Nov 2017)
+------------------------------
 
 Changes:
 
 * `chess.svg` is now fully SVG Tiny 1.2 compatible. Removed
   `chess.svg.DEFAULT_STYLE` which would from now on be always empty.
 
-New in v0.21.1
---------------
+New in v0.21.1 (14th Nov 2017)
+------------------------------
 
 Bugfixes:
 
@@ -779,21 +779,21 @@ Changes:
 * Documentation fixes and tweaks by Boštjan Mejak.
 * Changed unicode character for empty squares in `Board.unicode()`.
 
-New in v0.21.0
---------------
+New in v0.21.0 (13th Nov 2017)
+------------------------------
 
 Release yanked.
 
-New in v0.20.1
---------------
+New in v0.20.1 (16th Oct 2017)
+------------------------------
 
 Bugfixes:
 
 * Fix arrow positioning on SVG boards.
 * Documentation fixes and improvements, making most doctests runnable.
 
-New in v0.20.0
---------------
+New in v0.20.0 (13th Oct 2017)
+------------------------------
 
 Bugfixes:
 
@@ -820,8 +820,8 @@ New features:
 * Factored out some (unstable) low level APIs: `BB_CORNERS`,
   `_carry_rippler()`, `_edges()`.
 
-New in v0.19.0
---------------
+New in v0.19.0 (27th Jul 2017)
+------------------------------
 
 New features:
 
@@ -859,23 +859,23 @@ Changes:
   the extra dependencies are required for both UCI and XBoard engines).
 * Mixed documentation fixes and improvements.
 
-New in v0.18.4
---------------
+New in v0.18.4 (27th Jul 2017)
+------------------------------
 
 Changes:
 
 * Support `[Variant "fischerandom"]` in PGNs for Cutechess compatibility.
   Thanks to Steve Maughan for reporting.
 
-New in v0.18.3
---------------
+New in v0.18.3 (28th Jun 2017)
+------------------------------
 
 Bugfixes:
 
 * `chess.gaviota.NativeTablebases.get_dtm()` and `get_wdl()` were missing.
 
-New in v0.18.2
---------------
+New in v0.18.2 (1st Jun 2017)
+-----------------------------
 
 Bugfixes:
 
@@ -890,8 +890,8 @@ Changes:
 
 * Added more NAG constants in `chess.pgn`.
 
-New in v0.18.1
---------------
+New in v0.18.1 (1st May 2017)
+-----------------------------
 
 Bugfixes:
 
@@ -907,8 +907,8 @@ Changes:
 
 * `ThreeCheckBoard.uci_variant` changed from `threecheck` to `3check`.
 
-New in v0.18.0
---------------
+New in v0.18.0 (20th Apr 2017)
+------------------------------
 
 Bugfixes:
 
@@ -947,8 +947,8 @@ New features:
 * SVGs now have `viewBox` and `chess.svg.board(size=None)` supports and
   defaults to `None` (i.e. scaling to the size of the container).
 
-New in v0.17.0
---------------
+New in v0.17.0 (6th Mar 2017)
+-----------------------------
 
 Changes:
 
@@ -991,8 +991,8 @@ New features:
 * Added `msb()`, `lsb()`, `scan_reversed()` and `scan_forward()`.
 * Added `BB_RAYS` and `BB_BETWEEN`.
 
-New in v0.16.2
---------------
+New in v0.16.2 (15th Jan 2017)
+------------------------------
 
 Changes:
 
@@ -1003,16 +1003,16 @@ Changes:
 * `chess.svg`: Better vector graphics for knights. Thanks to ProgramFox.
 * Documentation improvements.
 
-New in v0.16.1
---------------
+New in v0.16.1 (12th Dec 2016)
+------------------------------
 
 Bugfixes:
 
 * Explosions in atomic chess were not destroying castling rights. Thanks to
   ProgramFOX for finding this issue.
 
-New in v0.16.0
---------------
+New in v0.16.0 (11th Dec 2016)
+------------------------------
 
 Bugfixes:
 
@@ -1061,8 +1061,8 @@ New features:
 
 * Highlight last move and checks when rendering board SVGs.
 
-New in v0.15.3
---------------
+New in v0.15.3 (21st Sep 2016)
+------------------------------
 
 Bugfixes:
 
@@ -1084,8 +1084,8 @@ Bugfixes:
   very similar to the bug fixed in v0.15.1. Thanks to piccoloprogrammatore
   for reporting.
 
-New in v0.15.1
---------------
+New in v0.15.1 (12th Sep 2016)
+------------------------------
 
 Bugfixes:
 
@@ -1094,10 +1094,10 @@ Bugfixes:
 
 New features:
 
-* Replaced __html__ with experimental SVG rendering for IPython.
+* Replaced `__html__` with experimental SVG rendering for IPython.
 
-New in v0.15.0
---------------
+New in v0.15.0 (11th Aug 2016)
+------------------------------
 
 Changes:
 
@@ -1130,8 +1130,8 @@ New features:
 
 * Added `chess.BB_BACKRANKS` and `chess.BB_PAWN_ATTACKS`.
 
-New in v0.14.1
---------------
+New in v0.14.1 (7th Jun 2016)
+-----------------------------
 
 Bugfixes:
 
@@ -1155,8 +1155,8 @@ Changes:
 
 * Documentation improvements.
 
-New in v0.14.0
---------------
+New in v0.14.0 (7th Apr 2016)
+-----------------------------
 
 Changes:
 
@@ -1197,8 +1197,8 @@ New features:
   `Board.generate_legal_captures(from_mask=BB_ALL, to_mask=BB_ALL)`.
 
 
-New in v0.13.3
---------------
+New in v0.13.3 (7th Apr 2016)
+-----------------------------
 
 **This is a bugfix release for a move generation bug.** Other than the bugfix
 itself there are only minimal fully backwardscompatible changes.
@@ -1228,8 +1228,8 @@ Changes:
 
 * Consistently handle tabs in UCI engine output.
 
-New in v0.13.2
---------------
+New in v0.13.2 (19th Jan 2016)
+------------------------------
 
 Changes:
 
@@ -1244,8 +1244,8 @@ Minor new features:
 
 * Added `chess.pgn.Game.from_board()`.
 
-New in v0.13.1
---------------
+New in v0.13.1 (20th Dec 2015)
+------------------------------
 
 Changes:
 
@@ -1267,8 +1267,8 @@ Minor new features:
 
 * Added `chess.SquareSet.from_square(square)`.
 
-New in v0.13.0
---------------
+New in v0.13.0 (10th Nov 2015)
+------------------------------
 
 * `chess.pgn.Game.export()` and `chess.pgn.GameNode.export()` have been
   removed and replaced with a new visitor concept.
@@ -1276,8 +1276,8 @@ New in v0.13.0
 * `chess.pgn.read_game()` no longer takes an `error_handler` argument. Errors
   are now logged. Use the new visitor concept to change this behaviour.
 
-New in v0.12.5
---------------
+New in v0.12.5 (18th Oct 2015)
+------------------------------
 
 Bugfixes:
 
@@ -1288,8 +1288,8 @@ Bugfixes:
 * PGN variation start comments for variations on the very first move were
   assigned to the game. Thanks to Norbert Räcke for reporting.
 
-New in v0.12.4
---------------
+New in v0.12.4 (13th Oct 2015)
+------------------------------
 
 Bugfixes:
 
@@ -1306,24 +1306,24 @@ Changes:
 
 * Added tox.ini to specify test suite and flake8 options.
 
-New in v0.12.3
---------------
+New in v0.12.3 (9th Oct 2015)
+-----------------------------
 
 Bugfixes:
 
 * Some invalid castling rights were silently ignored by `Board.set_fen()`. Now
   it is ensured information is stored for retrieval using `Board.status()`.
 
-New in v0.12.2
---------------
+New in v0.12.2 (7th Oct 2015)
+-----------------------------
 
 Bugfixes:
 
 * Some Gaviota probe results were incorrect for positions where black could
   capture en passant.
 
-New in v0.12.1
---------------
+New in v0.12.1 (7th Oct 2015)
+-----------------------------
 
 Changes:
 
@@ -1331,8 +1331,8 @@ Changes:
   method `Board.clean_castling_rights()` to get the subset of strictly valid
   castling rights.
 
-New in v0.12.0
---------------
+New in v0.12.0 (3rd Oct 2015)
+-----------------------------
 
 New features:
 
@@ -1340,8 +1340,8 @@ New features:
 
 * Pure Python Gaviota tablebase probing. Thanks to Jean-Noël Avila.
 
-New in v0.11.1
---------------
+New in v0.11.1 (7th Sep 2015)
+-----------------------------
 
 Bugfixes:
 
@@ -1352,8 +1352,8 @@ Bugfixes:
 * Ignore extra spaces in UCI `info` lines, as for example sent by the
   Hakkapeliitta engine. Thanks to Jürgen Précour for reporting.
 
-New in v0.11.0
---------------
+New in v0.11.0 (6th Sep 2015)
+-----------------------------
 
 Changes:
 
@@ -1394,15 +1394,15 @@ New features:
 
 * Make `repr(board.legal_moves)` human readable.
 
-New in v0.10.1
---------------
+New in v0.10.1 (30th Aug 2015)
+------------------------------
 
 Bugfixes:
 
 * Fix use-after-free in Gaviota tablebase initialization.
 
-New in v0.10.0
---------------
+New in v0.10.0 (28th Aug 2015)
+------------------------------
 
 New dependencies:
 
@@ -1486,8 +1486,8 @@ New features:
 
 * Support common set operations on `chess.SquareSet()`.
 
-New in v0.9.1
--------------
+New in v0.9.1 (15th Jul 2015)
+-----------------------------
 
 Bugfixes:
 
@@ -1500,8 +1500,8 @@ Bugfixes:
   rank must be empty, additionally. We do not do further retrograde analysis,
   because these are the only cases affecting move generation.
 
-New in v0.8.3
--------------
+New in v0.8.3 (15th Jul 2015)
+-----------------------------
 
 Bugfixes:
 
@@ -1512,8 +1512,8 @@ Bugfixes:
   rank must be empty, additionally. We do not do further retrograde analysis,
   because these are the only cases affecting move generation.
 
-New in v0.9.0
--------------
+New in v0.9.0 (24th Jun 2015)
+-----------------------------
 
 **This is a big update with quite a few breaking changes. Carefully review
 the changes before upgrading. It's no problem if you can not update right now.
@@ -1628,8 +1628,8 @@ New features:
   `Board.__str__()` but with unicode pieces.
 * Patch by Richard C. Gerkin: Added `Board.__html__()`.
 
-New in v0.8.2
--------------
+New in v0.8.2 (21st Jun 2015)
+-----------------------------
 
 Bugfixes:
 
@@ -1642,8 +1642,8 @@ Optimizations:
 * Remove `bswap()` from Syzygy decompression hot path. Directly read integers
   with the correct endianness.
 
-New in v0.8.1
--------------
+New in v0.8.1 (29th May 2015)
+-----------------------------
 
 * Fixed pondering mode in uci module. For example `ponderhit()` was blocking
   indefinitely. Thanks to Valeriy Huz for reporting this.
@@ -1672,8 +1672,8 @@ New in v0.8.1
 * Use containerized tests on Travis CI, test against Stockfish 6, improved
   test coverage amd various minor clean-ups.
 
-New in v0.8.0
--------------
+New in v0.8.0 (25th Mar 2015)
+-----------------------------
 
 * **Implement Syzygy endgame tablebase probing.**
   `https://syzygy-tables.info `_
@@ -1694,15 +1694,15 @@ New in v0.8.0
   startup sometimes needed to be processed before the Engine object was fully
   initialized.
 
-New in v0.7.0
--------------
+New in v0.7.0 (21st Feb 2015)
+-----------------------------
 
 * **Implement UCI engine communication.**
 
 * Patch by Matthew Lai: `Add caching for gameNode.board()`.
 
-New in v0.6.0
--------------
+New in v0.6.0 (8th Nov 2014)
+----------------------------
 
 * If there are comments in a game before the first move, these are now assigned
   to `Game.comment` instead of `Game.starting_comment`. `Game.starting_comment`
@@ -1725,8 +1725,8 @@ New in v0.6.0
 
 * Remove `next_bit()`. Now use `bit_scan()`.
 
-New in v0.5.0
--------------
+New in v0.5.0 (28th Oct 2014)
+-----------------------------
 
 * PGN parsing is now more robust: `read_game()` ignores invalid tokens.
   Still exceptions are going to be thrown on illegal or ambiguous moves, but
@@ -1772,14 +1772,14 @@ New in v0.5.0
 
 * Minor testcoverage improvements.
 
-New in v0.4.2
--------------
+New in v0.4.2 (11th Oct 2014)
+-----------------------------
 
 * Fix bug where `pawn_moves_from()` and consequently `is_legal()` weren't
   handling en passant correctly. Thanks to Norbert Naskov for reporting.
 
-New in v0.4.1
--------------
+New in v0.4.1 (26th Aug 2014)
+-----------------------------
 
 * Fix `is_fivefold_repitition()`: The new fivefold repetition rule requires
   the repetitions to occur on *alternating consecutive* moves.
@@ -1789,8 +1789,8 @@ New in v0.4.1
 
 * Add recently introduced features to README.
 
-New in v0.4.0
--------------
+New in v0.4.0 (19th Aug 2014)
+-----------------------------
 
 * Introduce `can_claim_draw()`, `can_claim_fifty_moves()` and
   `can_claim_threefold_repitition()`.
@@ -1822,8 +1822,8 @@ New in v0.4.0
 
 * Minor coding style fixes.
 
-New in v0.3.1
--------------
+New in v0.3.1 (15th Aug 2014)
+-----------------------------
 
 * `Bitboard.status()` now correctly detects `STATUS_INVALID_EP_SQUARE`,
   instead of errors or false reports.
@@ -1832,8 +1832,8 @@ New in v0.3.1
 
 * Minor coding style fixes, including removal of unused imports.
 
-New in v0.3.0
--------------
+New in v0.3.0 (13th Aug 2014)
+-----------------------------
 
 * Rename property `half_moves` of `Bitboard` to `halfmove_clock`.
 
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 1e51fee3f..1c68c9f34 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,8 +1,8 @@
 Changelog for python-chess
 ==========================
 
-New in v1.9.3
--------------
+New in v1.9.3 (16th Sep 2022)
+-----------------------------
 
 Bugfixes:
 
@@ -17,8 +17,8 @@ New features:
 
 * Add ``chess.Board.unicode(..., orientation=chess.WHITE)``.
 
-New in v1.9.2
--------------
+New in v1.9.2 (17th Jun 2022)
+-----------------------------
 
 Bugfixes:
 
@@ -30,8 +30,8 @@ New features:
 
 * Add ``chess.engine.AnalysisResult.would_block()``.
 
-New in v1.9.1
--------------
+New in v1.9.1 (28th May 2022)
+-----------------------------
 
 Bugfixes:
 
@@ -50,8 +50,8 @@ New features:
 
 * Add model ``sf15`` for ``chess.engine.Score.wdl()``.
 
-New in v1.9.0
--------------
+New in v1.9.0 (18th Mar 2022)
+-----------------------------
 
 Bugfixes:
 
@@ -64,8 +64,8 @@ New features:
 * Let ``chess.svg.board()`` add ASCII board as description of SVG.
 * Add hint when engine process dies due to illegal instruction.
 
-New in v1.8.0
--------------
+New in v1.8.0 (23rd Dec 2021)
+-----------------------------
 
 Bugfixes:
 
@@ -76,8 +76,8 @@ New features:
 
 * Read and write PGN comments like ``[%emt 0:05:21]``.
 
-New in v1.7.0
--------------
+New in v1.7.0 (7th Oct 2021)
+----------------------------
 
 New features:
 
@@ -90,16 +90,16 @@ Bugfixes:
 * ``chess.pgn``: Fix skipping with nested variations.
 * ``chess.svg``: Make check gradient compatible with QtSvg.
 
-New in v1.6.1
--------------
+New in v1.6.1 (12th Jun 2021)
+-----------------------------
 
 Bugfixes:
 
 * Make ``chess.engine.SimpleEngine.play(..., draw_offered=True)`` available.
   Previously only added for ``chess.engine.Protocol``.
 
-New in v1.6.0
--------------
+New in v1.6.0 (11th Jun 2021)
+-----------------------------
 
 New features:
 
@@ -121,8 +121,8 @@ Bugfixes:
 * Fix slightly off-center pawns in ``chess.svg``.
 * Fix typing error in Python 3.10 (due to added ``int.bit_count``).
 
-New in v1.5.0
--------------
+New in v1.5.0 (7th Apr 2021)
+----------------------------
 
 Bugfixes:
 
@@ -148,8 +148,8 @@ New features:
 Special thanks to @MarkZH for many of the engine related changes in this
 release!
 
-New in v1.4.0
--------------
+New in v1.4.0 (25th Jan 2021)
+-----------------------------
 
 New features:
 
@@ -165,8 +165,8 @@ Changes:
 * Recover from invalid UTF-8 sent by an UCI engine, by ignoring that
   (and only that) line.
 
-New in v1.3.3
--------------
+New in v1.3.3 (27th Dec 2020)
+-----------------------------
 
 Bugfixes:
 
@@ -184,8 +184,8 @@ New features:
 * Implemented Lichess winning chance model for ``chess.engine.Score``:
   ``score.wdl(model="lichess")``.
 
-New in v1.3.2
--------------
+New in v1.3.2 (12th Dec 2020)
+-----------------------------
 
 Bugfixes:
 
@@ -195,8 +195,8 @@ Bugfixes:
   on the same rank, file, or diagonal. Such positions are impossible to reach,
   break Stockfish, and maybe other engines.
 
-New in v1.3.1
--------------
+New in v1.3.1 (6th Dec 2020)
+----------------------------
 
 Bugfixes:
 
@@ -204,8 +204,8 @@ Bugfixes:
   castling rights (as well as mislabeled Standard Chess960 games). Previously,
   all castling moves in such games were rejected.
 
-New in v1.3.0
--------------
+New in v1.3.0 (6th Nov 2020)
+----------------------------
 
 Changes:
 
@@ -228,16 +228,16 @@ New features:
 
 * Added ``chess.pgn.GameNode.next()``.
 
-New in v1.2.2
--------------
+New in v1.2.2 (29th Oct 2020)
+-----------------------------
 
 Bugfixes:
 
 * Fixed regression where releases were uploaded without the ``py.typed``
   marker.
 
-New in v1.2.1
--------------
+New in v1.2.1 (26th Oct 2020)
+-----------------------------
 
 Changes:
 
@@ -254,8 +254,8 @@ Changes:
   previous versions? Run ``pip install --force-reinstall chess``
   (due to https://github.com/niklasf/python-chess/issues/680).
 
-New in v1.2.0
--------------
+New in v1.2.0 (22nd Oct 2020)
+-----------------------------
 
 New features:
 
@@ -282,8 +282,8 @@ Changes:
   ``chess.Board.epd()`` is now typed as ``Literal["legal", "fen", "xfen"]``
   rather than ``str``.
 
-New in v1.1.0
--------------
+New in v1.1.0 (4th Oct 2020)
+----------------------------
 
 New features:
 
@@ -297,15 +297,15 @@ Changes:
   like ``e2e4``, even if that is not a pawn move, castling notation with zeros,
   null moves in UCI notation, and null moves in XBoard notation.
 
-New in v1.0.1
--------------
+New in v1.0.1 (24th Sep 2020)
+-----------------------------
 
 Bugfixes:
 
 * ``chess.svg``: Restored SVG Tiny compatibility by splitting colors like
   ``#rrggbbaa`` into a solid color and opacity.
 
-New in v1.0.0
--------------
+New in v1.0.0 (24th Sep 2020)
+-----------------------------
 
 See ``CHANGELOG-OLD.rst`` for changes up to v1.0.0.

From 13f9781d515caba80e5dd60972e700e36362e3fe Mon Sep 17 00:00:00 2001
From: mush42 
Date: Wed, 12 Oct 2022 19:38:54 +0200
Subject: [PATCH 339/613] Added chessmart:
 https://github.com/blindpandas/chessmart

---
 README.rst | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.rst b/README.rst
index 8c85015e7..3a6ed5209 100644
--- a/README.rst
+++ b/README.rst
@@ -344,6 +344,8 @@ If you like, share interesting things you are using python-chess for, for exampl
 * a chessboard widget for PySide2 – https://github.com/H-a-y-k/hichesslib
 * Django Rest Framework API for multiplayer chess – https://github.com/WorkShoft/capablanca-api
 * a `browser based PGN viewer `_ written in PyScript – https://github.com/nmstoker/ChessMatchViewer
+* an accessible chessboard that allows blind and visually impaired  players  to play chess against Stockfish – https://github.com/blindpandas/chessmart
+
 
 Acknowledgements
 ----------------

From a721c5bbf8eff21b12c2417ba3eaa4001a4ad466 Mon Sep 17 00:00:00 2001
From: Trevor Bayless 
Date: Thu, 13 Oct 2022 21:29:51 -0500
Subject: [PATCH 340/613] Add specific move error exceptions

---
 chess/__init__.py | 78 +++++++++++++++++++++++++++++++++--------------
 chess/variant.py  |  2 +-
 test.py           | 43 +++++++++++++++-----------
 3 files changed, 81 insertions(+), 42 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index c83a24c59..30b9a392a 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -165,6 +165,18 @@ def result(self) -> str:
         return "1/2-1/2" if self.winner is None else ("1-0" if self.winner else "0-1")
 
 
+class InvalidMoveError(ValueError):
+    """Raised when the attempted move is invalid in the current position"""
+
+
+class IllegalMoveError(ValueError):
+    """Raised when the attempted move is illegal in the current position"""
+
+
+class AmbiguousMoveError(ValueError):
+    """Raised when the attempted move is ambiguous in the current position"""
+
+
 Square = int
 SQUARES = [
     A1, B1, C1, D1, E1, F1, G1, H1,
@@ -551,23 +563,29 @@ def from_uci(cls, uci: str) -> Move:
         """
         Parses a UCI string.
 
-        :raises: :exc:`ValueError` if the UCI string is invalid.
+        :raises: :exc:`InvalidMoveError` if the UCI string is invalid.
         """
         if uci == "0000":
             return cls.null()
         elif len(uci) == 4 and "@" == uci[1]:
-            drop = PIECE_SYMBOLS.index(uci[0].lower())
-            square = SQUARE_NAMES.index(uci[2:])
+            try:
+                drop = PIECE_SYMBOLS.index(uci[0].lower())
+                square = SQUARE_NAMES.index(uci[2:])
+            except ValueError:
+                raise InvalidMoveError(f"invalid uci: {uci!r}")
             return cls(square, square, drop=drop)
         elif 4 <= len(uci) <= 5:
-            from_square = SQUARE_NAMES.index(uci[0:2])
-            to_square = SQUARE_NAMES.index(uci[2:4])
-            promotion = PIECE_SYMBOLS.index(uci[4]) if len(uci) == 5 else None
+            try:
+                from_square = SQUARE_NAMES.index(uci[0:2])
+                to_square = SQUARE_NAMES.index(uci[2:4])
+                promotion = PIECE_SYMBOLS.index(uci[4]) if len(uci) == 5 else None
+            except ValueError:
+                raise InvalidMoveError(f"invalid uci: {uci!r}")
             if from_square == to_square:
-                raise ValueError(f"invalid uci (use 0000 for null moves): {uci!r}")
+                raise InvalidMoveError(f"invalid uci (use 0000 for null moves): {uci!r}")
             return cls(from_square, to_square, promotion=promotion)
         else:
-            raise ValueError(f"expected uci string to be of length 4 or 5: {uci!r}")
+            raise InvalidMoveError(f"expected uci string to be of length 4 or 5: {uci!r}")
 
     @classmethod
     def null(cls) -> Move:
@@ -2305,14 +2323,14 @@ def find_move(self, from_square: Square, to_square: Square, promotion: Optional[
         Castling moves are normalized to king moves by two steps, except in
         Chess960.
 
-        :raises: :exc:`ValueError` if no matching legal move is found.
+        :raises: :exc:`IllegalMoveError` if no matching legal move is found.
         """
         if promotion is None and self.pawns & BB_SQUARES[from_square] and BB_SQUARES[to_square] & BB_BACKRANKS:
             promotion = QUEEN
 
         move = self._from_chess960(self.chess960, from_square, to_square, promotion)
         if not self.is_legal(move):
-            raise ValueError(f"no matching legal move for {move.uci()} ({SQUARE_NAMES[from_square]} -> {SQUARE_NAMES[to_square]}) in {self.fen()}")
+            raise IllegalMoveError(f"no matching legal move for {move.uci()} ({SQUARE_NAMES[from_square]} -> {SQUARE_NAMES[to_square]}) in {self.fen()}")
 
         return move
 
@@ -2938,14 +2956,14 @@ def variation_san(self, variation: Iterable[Move]) -> str:
 
         The board will not be modified as a result of calling this.
 
-        :raises: :exc:`ValueError` if any moves in the sequence are illegal.
+        :raises: :exc:`IllegalMoveError` if any moves in the sequence are illegal.
         """
         board = self.copy(stack=False)
         san = []
 
         for move in variation:
             if not board.is_legal(move):
-                raise ValueError(f"illegal move {move} in position {board.fen()}")
+                raise IllegalMoveError(f"illegal move {move} in position {board.fen()}")
 
             if board.turn == WHITE:
                 san.append(f"{board.fullmove_number}. {board.san_and_push(move)}")
@@ -2966,7 +2984,11 @@ def parse_san(self, san: str) -> Move:
 
         The returned move is guaranteed to be either legal or a null move.
 
-        :raises: :exc:`ValueError` if the SAN is invalid, illegal or ambiguous.
+        :raises:
+            :exc:`ValueError` (or specifically an exception specified below) if the SAN is invalid, illegal or ambiguous.
+                - :exc:`InvalidMoveError` if the SAN is invalid.
+                - :exc:`IllegalMoveError` if the SAN is illegal.
+                - :exc:`AmbiguousMoveError` if the SAN is ambiguous.
         """
         # Castling.
         try:
@@ -2975,7 +2997,7 @@ def parse_san(self, san: str) -> Move:
             elif san in ["O-O-O", "O-O-O+", "O-O-O#", "0-0-0", "0-0-0+", "0-0-0#"]:
                 return next(move for move in self.generate_castling_moves() if self.is_queenside_castling(move))
         except StopIteration:
-            raise ValueError(f"illegal san: {san!r} in {self.fen()}")
+            raise IllegalMoveError(f"illegal san: {san!r} in {self.fen()}")
 
         # Match normal moves.
         match = SAN_REGEX.match(san)
@@ -2984,9 +3006,9 @@ def parse_san(self, san: str) -> Move:
             if san in ["--", "Z0", "0000", "@@@@"]:
                 return Move.null()
             elif "," in san:
-                raise ValueError(f"unsupported multi-leg move: {san!r}")
+                raise InvalidMoveError(f"unsupported multi-leg move: {san!r}")
             else:
-                raise ValueError(f"invalid san: {san!r}")
+                raise InvalidMoveError(f"invalid san: {san!r}")
 
         # Get target square. Mask our own pieces to exclude castling moves.
         to_square = SQUARE_NAMES.index(match.group(4))
@@ -3016,7 +3038,7 @@ def parse_san(self, san: str) -> Move:
             if move.promotion == promotion:
                 return move
             else:
-                raise ValueError(f"missing promotion piece type: {san!r} in {self.fen()}")
+                raise IllegalMoveError(f"missing promotion piece type: {san!r} in {self.fen()}")
         else:
             from_mask &= self.pawns
 
@@ -3031,12 +3053,12 @@ def parse_san(self, san: str) -> Move:
                 continue
 
             if matched_move:
-                raise ValueError(f"ambiguous san: {san!r} in {self.fen()}")
+                raise AmbiguousMoveError(f"ambiguous san: {san!r} in {self.fen()}")
 
             matched_move = move
 
         if not matched_move:
-            raise ValueError(f"illegal san: {san!r} in {self.fen()}")
+            raise IllegalMoveError(f"illegal san: {san!r} in {self.fen()}")
 
         return matched_move
 
@@ -3047,7 +3069,11 @@ def push_san(self, san: str) -> Move:
 
         Returns the move.
 
-        :raises: :exc:`ValueError` if neither legal nor a null move.
+        :raises:
+            :exc:`ValueError` (or specifically an exception specified below) if neither legal nor a null move.
+                - :exc:`InvalidMoveError` if the SAN is invalid.
+                - :exc:`IllegalMoveError` if the SAN is illegal.
+                - :exc:`AmbiguousMoveError` if the SAN is ambiguous.
         """
         move = self.parse_san(san)
         self.push(move)
@@ -3075,8 +3101,11 @@ def parse_uci(self, uci: str) -> Move:
 
         The returned move is guaranteed to be either legal or a null move.
 
-        :raises: :exc:`ValueError` if the move is invalid or illegal in the
+        :raises:
+            :exc:`ValueError` (or specifically an exception specified below) if the move is invalid or illegal in the
             current position (but not a null move).
+                - :exc:`InvalidMoveError` if the UCI is invalid.
+                - :exc:`IllegalMoveError` if the UCI is illegal.
         """
         move = Move.from_uci(uci)
 
@@ -3087,7 +3116,7 @@ def parse_uci(self, uci: str) -> Move:
         move = self._from_chess960(self.chess960, move.from_square, move.to_square, move.promotion, move.drop)
 
         if not self.is_legal(move):
-            raise ValueError(f"illegal uci: {uci!r} in {self.fen()}")
+            raise IllegalMoveError(f"illegal uci: {uci!r} in {self.fen()}")
 
         return move
 
@@ -3097,8 +3126,11 @@ def push_uci(self, uci: str) -> Move:
 
         Returns the move.
 
-        :raises: :exc:`ValueError` if the move is invalid or illegal in the
+        :raises:
+            :exc:`ValueError` (or specifically an exception specified below) if the move is invalid or illegal in the
             current position (but not a null move).
+                - :exc:`InvalidMoveError` if the UCI is invalid.
+                - :exc:`IllegalMoveError` if the UCI is illegal.
         """
         move = self.parse_uci(uci)
         self.push(move)
diff --git a/chess/variant.py b/chess/variant.py
index 3fec62c3c..bda312c6d 100644
--- a/chess/variant.py
+++ b/chess/variant.py
@@ -989,7 +989,7 @@ def parse_san(self, san: str) -> chess.Move:
                 uci = "P" + uci
             move = chess.Move.from_uci(uci)
             if not self.is_legal(move):
-                raise ValueError(f"illegal drop san: {san!r} in {self.fen()}")
+                raise chess.IllegalMoveError(f"illegal drop san: {san!r} in {self.fen()}")
             return move
         else:
             return super().parse_san(san)
diff --git a/test.py b/test.py
index 9e9a4c1d5..19ac0e65e 100755
--- a/test.py
+++ b/test.py
@@ -120,16 +120,16 @@ def test_uci_parsing(self):
         self.assertEqual(chess.Move.from_uci("0000").uci(), "0000")
 
     def test_invalid_uci(self):
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.InvalidMoveError):
             chess.Move.from_uci("")
 
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.InvalidMoveError):
             chess.Move.from_uci("N")
 
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.InvalidMoveError):
             chess.Move.from_uci("z1g3")
 
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.InvalidMoveError):
             chess.Move.from_uci("Q@g9")
 
     def test_xboard_move(self):
@@ -383,9 +383,9 @@ def test_castling(self):
     def test_castling_san(self):
         board = chess.Board("4k3/8/8/8/8/8/8/4K2R w K - 0 1")
         self.assertEqual(board.parse_san("O-O"), chess.Move.from_uci("e1g1"))
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.IllegalMoveError):
             board.parse_san("Kg1")
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.IllegalMoveError):
             board.parse_san("Kh1")
 
     def test_ninesixty_castling(self):
@@ -503,9 +503,9 @@ def test_find_move(self):
         self.assertEqual(board.find_move(chess.B7, chess.B8, chess.KNIGHT), chess.Move.from_uci("b7b8n"))
 
         # Illegal moves.
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.IllegalMoveError):
             board.find_move(chess.D2, chess.D8)
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.IllegalMoveError):
             board.find_move(chess.E1, chess.A1)
 
         # Castling.
@@ -590,6 +590,13 @@ def test_promotion_with_check(self):
         board.push_san("d1=Q+")
         self.assertEqual(board.fen(), "8/8/8/3R1P2/8/2k2K2/8/r2q4 w - - 0 83")
 
+    def test_ambiguous_move(self):
+        board = chess.Board("8/8/1n6/3R1P2/1n6/2k2K2/3p4/r6r b - - 0 82")
+        with self.assertRaises(chess.AmbiguousMoveError):
+            board.parse_san("Rf1")
+        with self.assertRaises(chess.AmbiguousMoveError):
+            board.parse_san("Nd5")
+
     def test_scholars_mate(self):
         board = chess.Board()
 
@@ -723,17 +730,17 @@ def test_lan(self):
 
     def test_san_newline(self):
         board = chess.Board("rnbqk2r/ppppppbp/5np1/8/8/5NP1/PPPPPPBP/RNBQK2R w KQkq - 2 4")
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.InvalidMoveError):
             board.parse_san("O-O\n")
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.InvalidMoveError):
             board.parse_san("Nc3\n")
 
     def test_pawn_capture_san_without_file(self):
         board = chess.Board("2rq1rk1/pb2bppp/1p2p3/n1ppPn2/2PP4/PP3N2/1B1NQPPP/RB3RK1 b - - 4 13")
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.IllegalMoveError):
             board.parse_san("c4")
         board = chess.Board("4k3/8/8/4Pp2/8/8/8/4K3 w - f6 0 2")
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.IllegalMoveError):
             board.parse_san("f6")
 
     def test_variation_san(self):
@@ -763,7 +770,7 @@ def test_variation_san(self):
 
         illegal_variation = ['d3h7', 'g8h7', 'f3h6', 'h7g8']
         board = chess.Board(fen)
-        with self.assertRaises(ValueError) as err:
+        with self.assertRaises(chess.IllegalMoveError) as err:
             board.variation_san([chess.Move.from_uci(m) for m in illegal_variation])
         message = str(err.exception)
         self.assertIn('illegal move', message.lower(),
@@ -4018,7 +4025,7 @@ def test_parse_san(self):
         board.push_san("d5")
 
         # Capture is mandatory.
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.IllegalMoveError):
             board.push_san("Nf3")
 
     def test_is_legal(self):
@@ -4159,15 +4166,15 @@ def test_atomic_castle_with_kings_touching(self):
         self.assertEqual(board.fen(), "8/8/8/8/8/8/4k3/2KR3q b - - 1 1")
 
         board = chess.variant.AtomicBoard("8/8/8/8/8/8/5k2/R3K2r w Q - 0 1")
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.IllegalMoveError):
             board.push_san("O-O-O")
 
         board = chess.variant.AtomicBoard("8/8/8/8/8/8/6k1/R5Kr w Q - 0 1", chess960=True)
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.IllegalMoveError):
             board.push_san("O-O-O")
 
         board = chess.variant.AtomicBoard("8/8/8/8/8/8/4k3/r2RK2r w D - 0 1", chess960=True)
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.IllegalMoveError):
             board.push_san("O-O-O")
 
     def test_castling_rights_explode_with_king(self):
@@ -4495,7 +4502,7 @@ def test_capture_with_promotion(self):
 
     def test_illegal_drop_uci(self):
         board = chess.variant.CrazyhouseBoard()
-        with self.assertRaises(ValueError):
+        with self.assertRaises(chess.IllegalMoveError):
             board.parse_uci("N@f3")
 
     def test_crazyhouse_fen(self):

From 76903846bf6e91cf2a7090be4c9c3abcec78eb80 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 15 Oct 2022 17:15:56 +0200
Subject: [PATCH 341/613] InvalidMoveError does not depend on the position

---
 chess/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 30b9a392a..20deb1b4d 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -166,7 +166,7 @@ def result(self) -> str:
 
 
 class InvalidMoveError(ValueError):
-    """Raised when the attempted move is invalid in the current position"""
+    """Raised when move notation is not syntactically valid"""
 
 
 class IllegalMoveError(ValueError):

From 38ab554ff1a84c5defdde6761673600e1a259c8b Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 15 Oct 2022 17:24:06 +0200
Subject: [PATCH 342/613] Slightly tweak wording of new exception docs

---
 chess/__init__.py | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 20deb1b4d..4dca9d590 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -2985,8 +2985,8 @@ def parse_san(self, san: str) -> Move:
         The returned move is guaranteed to be either legal or a null move.
 
         :raises:
-            :exc:`ValueError` (or specifically an exception specified below) if the SAN is invalid, illegal or ambiguous.
-                - :exc:`InvalidMoveError` if the SAN is invalid.
+            :exc:`ValueError` (specifically an exception specified below) if the SAN is invalid, illegal or ambiguous.
+                - :exc:`InvalidMoveError` if the SAN is syntactically invalid.
                 - :exc:`IllegalMoveError` if the SAN is illegal.
                 - :exc:`AmbiguousMoveError` if the SAN is ambiguous.
         """
@@ -3070,8 +3070,8 @@ def push_san(self, san: str) -> Move:
         Returns the move.
 
         :raises:
-            :exc:`ValueError` (or specifically an exception specified below) if neither legal nor a null move.
-                - :exc:`InvalidMoveError` if the SAN is invalid.
+            :exc:`ValueError` (specifically an exception specified below) if neither legal nor a null move.
+                - :exc:`InvalidMoveError` if the SAN is syntactically invalid.
                 - :exc:`IllegalMoveError` if the SAN is illegal.
                 - :exc:`AmbiguousMoveError` if the SAN is ambiguous.
         """
@@ -3102,9 +3102,9 @@ def parse_uci(self, uci: str) -> Move:
         The returned move is guaranteed to be either legal or a null move.
 
         :raises:
-            :exc:`ValueError` (or specifically an exception specified below) if the move is invalid or illegal in the
+            :exc:`ValueError` (specifically an exception specified below) if the move is invalid or illegal in the
             current position (but not a null move).
-                - :exc:`InvalidMoveError` if the UCI is invalid.
+                - :exc:`InvalidMoveError` if the UCI is syntactically invalid.
                 - :exc:`IllegalMoveError` if the UCI is illegal.
         """
         move = Move.from_uci(uci)
@@ -3127,9 +3127,9 @@ def push_uci(self, uci: str) -> Move:
         Returns the move.
 
         :raises:
-            :exc:`ValueError` (or specifically an exception specified below) if the move is invalid or illegal in the
+            :exc:`ValueError` (specifically an exception specified below) if the move is invalid or illegal in the
             current position (but not a null move).
-                - :exc:`InvalidMoveError` if the UCI is invalid.
+                - :exc:`InvalidMoveError` if the UCI is syntactically invalid.
                 - :exc:`IllegalMoveError` if the UCI is illegal.
         """
         move = self.parse_uci(uci)

From 5fc7298a1920d175061f9dae83373330be0b1035 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 16 Oct 2022 13:06:28 +0200
Subject: [PATCH 343/613] Bump to Sphinx 5.3.0

---
 docs/requirements.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/requirements.txt b/docs/requirements.txt
index baa05d40d..dd8706637 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1 @@
-Sphinx==5.1.1
+Sphinx==5.3.0

From f96a87c79bdc58856328507ebb9dfd139af9ab97 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 17 Oct 2022 19:45:55 +0200
Subject: [PATCH 344/613] Check that board matches tablebase variant (#929)

---
 chess/syzygy.py | 17 +++++++++--------
 test.py         |  7 +++++++
 2 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/chess/syzygy.py b/chess/syzygy.py
index 33302ba46..0266ea422 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -1585,6 +1585,15 @@ def probe_wdl_table(self, board: chess.Board) -> int:
         return table.probe_wdl_table(board)
 
     def probe_ab(self, board: chess.Board, alpha: int, beta: int, threats: bool = False) -> Tuple[int, int]:
+        # Check preconditions.
+        if board.uci_variant != self.variant.uci_variant:
+            raise KeyError(f"tablebase has been opened for {self.variant.uci_variant}, probed with: {board.uci_variant}")
+        if board.castling_rights:
+            raise KeyError(f"syzygy tables do not contain positions with castling rights: {board.fen()}")
+        if chess.popcount(board.occupied) > TBPIECES:
+            raise KeyError(f"syzygy tables support up to {TBPIECES} pieces, not {chess.popcount(board.occupied)}: {board.fen()}")
+
+        # Special case: Variant with compulsory captures.
         if self.variant.captures_compulsory:
             if board.is_variant_win():
                 return 2, 2
@@ -1701,14 +1710,6 @@ def probe_wdl(self, board: chess.Board) -> int:
 
             Note that probing corrupted table files is undefined behavior.
         """
-        # Positions with castling rights are not in the tablebase.
-        if board.castling_rights:
-            raise KeyError(f"syzygy tables do not contain positions with castling rights: {board.fen()}")
-
-        # Validate piece count.
-        if chess.popcount(board.occupied) > TBPIECES:
-            raise KeyError(f"syzygy tables support up to {TBPIECES} pieces, not {chess.popcount(board.occupied)}: {board.fen()}")
-
         # Probe.
         v, _ = self.probe_ab(board, -2, 2)
 
diff --git a/test.py b/test.py
index 19ac0e65e..3ed890dcb 100755
--- a/test.py
+++ b/test.py
@@ -3892,6 +3892,13 @@ def test_suicide_stats(self):
                 self.assertAlmostEqual(dtz, solution["dtz"], delta=1,
                                        msg=f"Expected dtz {solution['dtz']}, got {dtz} (in l. {l + 1}, fen: {board.fen()})")
 
+    def test_antichess_kvk(self):
+        kvk = chess.variant.AntichessBoard("8/8/8/8/8/3K4/8/4k3 w - - 0 30")
+
+        tables = chess.syzygy.Tablebase()
+        with self.assertRaises(KeyError):
+            tables.probe_dtz(kvk)
+
 
 class NativeGaviotaTestCase(unittest.TestCase):
 

From 13e674c13095c0e03f96b439a20e0864eb27cb60 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 17 Oct 2022 19:51:52 +0200
Subject: [PATCH 345/613] Use default for chess.AtomicBoard.one_king

---
 chess/variant.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/chess/variant.py b/chess/variant.py
index bda312c6d..cd1670480 100644
--- a/chess/variant.py
+++ b/chess/variant.py
@@ -210,7 +210,6 @@ class AtomicBoard(chess.Board):
     tbw_magic = b"\x55\x8d\xa4\x49"
     tbz_magic = b"\x91\xa9\x5e\xeb"
     connected_kings = True
-    one_king = True
 
     def is_variant_end(self) -> bool:
         return not all(self.kings & side for side in self.occupied_co)

From c6e7e4961b32a7f4ad855598ce6d7103a76a7b32 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 17 Oct 2022 19:52:09 +0200
Subject: [PATCH 346/613] Test Antichess KvK that cannot be resolved by search
 (#929)

---
 test.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/test.py b/test.py
index 3ed890dcb..4c8db196e 100755
--- a/test.py
+++ b/test.py
@@ -3893,12 +3893,16 @@ def test_suicide_stats(self):
                                        msg=f"Expected dtz {solution['dtz']}, got {dtz} (in l. {l + 1}, fen: {board.fen()})")
 
     def test_antichess_kvk(self):
-        kvk = chess.variant.AntichessBoard("8/8/8/8/8/3K4/8/4k3 w - - 0 30")
+        kvk = chess.variant.AntichessBoard("4k3/8/8/8/8/8/8/4K3 w - - 0 1")
 
         tables = chess.syzygy.Tablebase()
         with self.assertRaises(KeyError):
             tables.probe_dtz(kvk)
 
+        tables = chess.syzygy.Tablebase(VariantBoard=chess.variant.AntichessBoard)
+        with self.assertRaises(chess.syzygy.MissingTableError):
+            tables.probe_dtz(kvk)
+
 
 class NativeGaviotaTestCase(unittest.TestCase):
 

From 7ab1acb8880d013f5cd92257bf3f9350219101e0 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Tue, 25 Oct 2022 22:01:19 +0200
Subject: [PATCH 347/613] Try Python 3.11

---
 .github/workflows/test.yml | 8 ++++----
 setup.py                   | 1 +
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 656af180f..68ab5bb19 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,7 +7,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3
@@ -24,7 +24,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
-          python-version: "3.10"
+          python-version: "3.11"
       - run: pip install -e .
       - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000
       - run: python examples/perft/perft.py -t 1 examples/perft/tricky.perft
@@ -38,7 +38,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: ["3.9", "3.10"]
+        python-version: ["3.9", "3.11"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
@@ -55,7 +55,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-python@v4
         with:
-          python-version: "3.10"
+          python-version: "3.11"
       - run: sudo apt-get update && sudo apt-get install -y docutils-common
       - run: python setup.py --long-description | rst2html --strict --no-raw > /dev/null
       - run: pip install -e .
diff --git a/setup.py b/setup.py
index cbaa70e3e..bc6a8af51 100755
--- a/setup.py
+++ b/setup.py
@@ -93,6 +93,7 @@ def read_description():
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
         "Topic :: Games/Entertainment :: Board Games",
         "Topic :: Games/Entertainment :: Turn Based Strategy",
         "Topic :: Software Development :: Libraries :: Python Modules",

From feb8c82b6218fc8cd46e736f9a56caf9383c0122 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Tue, 22 Nov 2022 19:07:47 +0100
Subject: [PATCH 348/613] PettingZoo now on https://pettingzoo.farama.org
 (fixes #940)

---
 README.rst | 62 +++++++++++++++++++++++++++---------------------------
 1 file changed, 31 insertions(+), 31 deletions(-)

diff --git a/README.rst b/README.rst
index 3a6ed5209..aae81e788 100644
--- a/README.rst
+++ b/README.rst
@@ -300,37 +300,37 @@ Selected projects
 
 If you like, share interesting things you are using python-chess for, for example:
 
-+------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+
-| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/syzygy.png?raw=true       | https://syzygy-tables.info/                                                             |
-|     :height: 64                                                                                      |                                                                                         |
-|     :width: 64                                                                                       |                                                                                         |
-|     :target: https://syzygy-tables.info/                                                             | A website to probe Syzygy endgame tablebases                                            |
-+------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+
-| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/maia.png?raw=true         | https://maiachess.com/                                                                  |
-|     :height: 64                                                                                      |                                                                                         |
-|     :width: 64                                                                                       |                                                                                         |
-|     :target: https://maiachess.com/                                                                  | A human-like neural network chess engine                                                |
-+------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+
-| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | `clente/chess `_                                       |
-|     :height: 64                                                                                      |                                                                                         |
-|     :width: 64                                                                                       |                                                                                         |
-|     :target: https://github.com/clente/chess                                                         | Oppinionated wrapper to use python-chess from the R programming language                |
-+------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+
-| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/crazyara.png?raw=true     | https://crazyara.org/                                                                   |
-|     :height: 64                                                                                      |                                                                                         |
-|     :width: 64                                                                                       |                                                                                         |
-|     :target: https://crazyara.org/                                                                   | Deep learning for Crazyhouse                                                            |
-+------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+
-| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/jcchess.png?raw=true      | `http://johncheetham.com `_                  |
-|     :height: 64                                                                                      |                                                                                         |
-|     :width: 64                                                                                       |                                                                                         |
-|     :target: http://johncheetham.com/projects/jcchess/                                               | A GUI to play against UCI chess engines                                                 |
-+------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+
-| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/pettingzoo.png?raw=true   | `https://www.pettingzoo.ml `_                  |
-|     :width: 64                                                                                       |                                                                                         |
-|     :height: 64                                                                                      |                                                                                         |
-|     :target: https://www.pettingzoo.ml/classic/chess                                                 | A multi-agent reinforcement learning environment                                        |
-+------------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------+
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/syzygy.png?raw=true       | https://syzygy-tables.info/                                                                  |
+|     :height: 64                                                                                      |                                                                                              |
+|     :width: 64                                                                                       |                                                                                              |
+|     :target: https://syzygy-tables.info/                                                             | A website to probe Syzygy endgame tablebases                                                 |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/maia.png?raw=true         | https://maiachess.com/                                                                       |
+|     :height: 64                                                                                      |                                                                                              |
+|     :width: 64                                                                                       |                                                                                              |
+|     :target: https://maiachess.com/                                                                  | A human-like neural network chess engine                                                     |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | `clente/chess `_                                            |
+|     :height: 64                                                                                      |                                                                                              |
+|     :width: 64                                                                                       |                                                                                              |
+|     :target: https://github.com/clente/chess                                                         | Oppinionated wrapper to use python-chess from the R programming language                     |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/crazyara.png?raw=true     | https://crazyara.org/                                                                        |
+|     :height: 64                                                                                      |                                                                                              |
+|     :width: 64                                                                                       |                                                                                              |
+|     :target: https://crazyara.org/                                                                   | Deep learning for Crazyhouse                                                                 |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/jcchess.png?raw=true      | `http://johncheetham.com `_                       |
+|     :height: 64                                                                                      |                                                                                              |
+|     :width: 64                                                                                       |                                                                                              |
+|     :target: http://johncheetham.com/projects/jcchess/                                               | A GUI to play against UCI chess engines                                                      |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/pettingzoo.png?raw=true   | `https://pettingzoo.farama.org `_ |
+|     :width: 64                                                                                       |                                                                                              |
+|     :height: 64                                                                                      |                                                                                              |
+|     :target: https://pettingzoo.farama.org/environments/classic/chess/                               | A multi-agent reinforcement learning environment                                             |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
 
 * extensions to build engines (search and evaluation) – https://github.com/Mk-Chan/python-chess-engine-extensions
 * a stand-alone chess computer based on DGT board – http://www.picochess.org/

From 553506719ecc2535ca1b06962792186681307624 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Tue, 22 Nov 2022 19:56:55 +0100
Subject: [PATCH 349/613] Simplify SVG board fill example for Python 3.8 compat
 (fixes #936)

---
 chess/svg.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/svg.py b/chess/svg.py
index 9474550fe..6021e2054 100644
--- a/chess/svg.py
+++ b/chess/svg.py
@@ -280,7 +280,7 @@ def board(board: Optional[chess.BaseBoard] = None, *,
     >>>
     >>> chess.svg.board(
     ...     board,
-    ...     fill=dict.fromkeys(board.attacks(chess.E4), "#cc0000cc") | {chess.E4: "#00cc00cc"},
+    ...     fill=dict.fromkeys(board.attacks(chess.E4), "#cc0000cc"),
     ...     arrows=[chess.svg.Arrow(chess.E4, chess.F6, color="#0000cccc")],
     ...     squares=chess.SquareSet(chess.BB_DARK_SQUARES & chess.BB_FILE_B),
     ...     size=350,

From 5673479edcd225a59506a7ec9127201cdf10492c Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 27 Nov 2022 10:08:44 +0100
Subject: [PATCH 350/613] Mention that parse_san is not strict (#931)

---
 chess/__init__.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 4dca9d590..c1a2978a9 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -2980,7 +2980,8 @@ def parse_san(self, san: str) -> Move:
         algebraic notation and returns the corresponding move object.
 
         Ambiguous moves are rejected. Overspecified moves (including long
-        algebraic notation) are accepted.
+        algebraic notation) are accepted. Some common syntactical deviations
+        are also accepted.
 
         The returned move is guaranteed to be either legal or a null move.
 

From b1de45e7d78532f7ed4cb7264c3a0faa2ccda508 Mon Sep 17 00:00:00 2001
From: Fabian Fichter 
Date: Sun, 18 Dec 2022 13:28:43 +0100
Subject: [PATCH 351/613] Add SF 15.1 win rate model

And make it the default.
---
 chess/engine.py | 20 +++++++++++++++++---
 test.py         |  1 +
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 5194247f6..ad61bc580 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -44,7 +44,7 @@
 
 try:
     from typing import Literal
-    _WdlModel = Literal["sf", "sf15", "sf14", "sf12", "lichess"]
+    _WdlModel = Literal["sf", "sf15.1", "sf15", "sf14", "sf12", "lichess"]
 except ImportError:
     # Before Python 3.8.
     _WdlModel = str  # type: ignore
@@ -564,7 +564,8 @@ def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> Wdl:
 
         :param model:
             * ``sf``, the WDL model used by the latest Stockfish
-              (currently ``sf15``).
+              (currently ``sf15.1``).
+            * ``sf15.1``, the WDL model used by Stockfish 15.1.
             * ``sf15``, the WDL model used by Stockfish 15.
             * ``sf14``, the WDL model used by Stockfish 14.
             * ``sf12``, the WDL model used by Stockfish 12.
@@ -628,6 +629,16 @@ def __ge__(self, other: object) -> bool:
             return NotImplemented
 
 
+def _sf15_1_wins(cp: int, *, ply: int) -> int:
+    # https://github.com/official-stockfish/Stockfish/blob/sf_15.1/src/uci.cpp#L200-L224
+    # https://github.com/official-stockfish/Stockfish/blob/sf_15.1/src/uci.h#L38
+    NormalizeToPawnValue = 361
+    m = min(240, max(ply, 0)) / 64
+    a = (((-0.58270499 * m + 2.68512549) * m + 15.24638015) * m) + 344.49745382
+    b = (((-2.65734562 * m + 15.96509799) * m + -20.69040836) * m) + 73.61029937
+    x = min(4000, max(cp * NormalizeToPawnValue / 100, -4000))
+    return int(0.5 + 1000 / (1 + math.exp((a - x) / b)))
+
 def _sf15_wins(cp: int, *, ply: int) -> int:
     # https://github.com/official-stockfish/Stockfish/blob/sf_15/src/uci.cpp#L200-L220
     m = min(240, max(ply, 0)) / 64
@@ -678,9 +689,12 @@ def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> Wdl:
         elif model == "sf14":
             wins = _sf14_wins(self.cp, ply=ply)
             losses = _sf14_wins(-self.cp, ply=ply)
-        else:
+        elif model == "sf15":
             wins = _sf15_wins(self.cp, ply=ply)
             losses = _sf15_wins(-self.cp, ply=ply)
+        else:
+            wins = _sf15_1_wins(self.cp, ply=ply)
+            losses = _sf15_1_wins(-self.cp, ply=ply)
         draws = 1000 - wins - losses
         return Wdl(wins, draws, losses)
 
diff --git a/test.py b/test.py
index 4c8db196e..9bb575802 100755
--- a/test.py
+++ b/test.py
@@ -2969,6 +2969,7 @@ def test_wdl_model(self):
         self.assertEqual(chess.engine.Cp(131).wdl(model="sf12", ply=25), chess.engine.Wdl(524, 467, 9))
         self.assertEqual(chess.engine.Cp(146).wdl(model="sf14", ply=25), chess.engine.Wdl(601, 398, 1))
         self.assertEqual(chess.engine.Cp(40).wdl(model="sf15", ply=25), chess.engine.Wdl(58, 937, 5))
+        self.assertEqual(chess.engine.Cp(100).wdl(model="sf15.1", ply=64), chess.engine.Wdl(497, 503, 0))
 
     @catchAndSkip(FileNotFoundError, "need stockfish")
     def test_sf_forced_mates(self):

From beb68d3d85ee6a044a902998d314785223b2362e Mon Sep 17 00:00:00 2001
From: Fabian Fichter 
Date: Sun, 18 Dec 2022 17:20:51 +0100
Subject: [PATCH 352/613] Make relative WDL consider model and ply

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index ad61bc580..a431df7da 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -469,7 +469,7 @@ def is_mate(self) -> bool:
 
     def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> PovWdl:
         """See :func:`~chess.engine.Score.wdl()`."""
-        return PovWdl(self.relative.wdl(), self.turn)
+        return PovWdl(self.relative.wdl(model=model, ply=ply), self.turn)
 
     def __repr__(self) -> str:
         return "PovScore({!r}, {})".format(self.relative, "WHITE" if self.turn else "BLACK")

From 0a2075d6438a36c8cb694e4bfa31b71f2497f693 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 22 Dec 2022 11:54:09 +0100
Subject: [PATCH 353/613] Fix test suite with Stockfish 15.1

---
 test.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test.py b/test.py
index 9bb575802..b9be057e1 100755
--- a/test.py
+++ b/test.py
@@ -2997,7 +2997,7 @@ def test_sf_options(self):
     def test_sf_analysis(self):
         with chess.engine.SimpleEngine.popen_uci("stockfish", setpgrp=True, debug=True) as engine:
             board = chess.Board("8/6K1/1p1B1RB1/8/2Q5/2n1kP1N/3b4/4n3 w - - 0 1")
-            limit = chess.engine.Limit(depth=28)
+            limit = chess.engine.Limit(depth=40)
             analysis = engine.analysis(board, limit)
             with analysis:
                 for info in iter(analysis.next, None):

From b04275aa415f5783118feb1732ec16e468bb9c06 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 22 Dec 2022 12:27:20 +0100
Subject: [PATCH 354/613] Prepare 1.9.4

---
 CHANGELOG.rst     | 14 ++++++++++++++
 chess/__init__.py |  2 +-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 1c68c9f34..2580c841c 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,20 @@
 Changelog for python-chess
 ==========================
 
+New in v1.9.4 (22nd Dec 2022)
+-----------------------------
+
+Bugfixes:
+
+* Fix ``PovScore.wdl()`` ignored ``model`` and ``ply`` parameters.
+* ``chess.syzygy``: Check that board matches tablebase variant.
+
+New features:
+
+* Add model ``sf15.1`` for ``chess.engine.Score.wdl()``.
+* Raise more specific exceptions: ``chess.IllegalMoveError``,
+  ``chess.AmbiguousMoveError``, and ``chess.InvalidMoveError``.
+
 New in v1.9.3 (16th Sep 2022)
 -----------------------------
 
diff --git a/chess/__init__.py b/chess/__init__.py
index c1a2978a9..883d5fbda 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -27,7 +27,7 @@
 
 __email__ = "niklas.fiekas@backscattering.de"
 
-__version__ = "1.9.3"
+__version__ = "1.9.4"
 
 import collections
 import copy

From cc079b6683aa7b597530de247e08b2326941898e Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 26 Dec 2022 10:40:49 +0100
Subject: [PATCH 355/613] Fix %eval sometimes off by one centipawn

---
 chess/engine.py | 14 +++++++-------
 chess/pgn.py    |  2 +-
 test.py         |  6 ++++++
 3 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index a431df7da..f319d09bf 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1538,16 +1538,16 @@ def _go(self, limit: Limit, *, root_moves: Optional[Iterable[chess.Move]] = None
             builder.append("ponder")
         if limit.white_clock is not None:
             builder.append("wtime")
-            builder.append(str(max(1, int(limit.white_clock * 1000))))
+            builder.append(str(max(1, round(limit.white_clock * 1000))))
         if limit.black_clock is not None:
             builder.append("btime")
-            builder.append(str(max(1, int(limit.black_clock * 1000))))
+            builder.append(str(max(1, round(limit.black_clock * 1000))))
         if limit.white_inc is not None:
             builder.append("winc")
-            builder.append(str(int(limit.white_inc * 1000)))
+            builder.append(str(round(limit.white_inc * 1000)))
         if limit.black_inc is not None:
             builder.append("binc")
-            builder.append(str(int(limit.black_inc * 1000)))
+            builder.append(str(round(limit.black_inc * 1000)))
         if limit.remaining_moves is not None and int(limit.remaining_moves) > 0:
             builder.append("movestogo")
             builder.append(str(int(limit.remaining_moves)))
@@ -1562,7 +1562,7 @@ def _go(self, limit: Limit, *, root_moves: Optional[Iterable[chess.Move]] = None
             builder.append(str(max(1, int(limit.mate))))
         if limit.time is not None:
             builder.append("movetime")
-            builder.append(str(max(1, int(limit.time * 1000))))
+            builder.append(str(max(1, round(limit.time * 1000))))
         if infinite:
             builder.append("infinite")
         if root_moves is not None:
@@ -2160,9 +2160,9 @@ def start(self, engine: XBoardProtocol) -> None:
                 if limit.depth is not None:
                     engine.send_line(f"sd {max(1, int(limit.depth))}")
                 if limit.white_clock is not None:
-                    engine.send_line("{} {}".format("time" if board.turn else "otim", max(1, int(limit.white_clock * 100))))
+                    engine.send_line("{} {}".format("time" if board.turn else "otim", max(1, round(limit.white_clock * 100))))
                 if limit.black_clock is not None:
-                    engine.send_line("{} {}".format("otim" if board.turn else "time", max(1, int(limit.black_clock * 100))))
+                    engine.send_line("{} {}".format("otim" if board.turn else "time", max(1, round(limit.black_clock * 100))))
 
                 if draw_offered and engine.features.get("draw", 1):
                     engine.send_line("draw")
diff --git a/chess/pgn.py b/chess/pgn.py
index da97866c3..f802a780f 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -420,7 +420,7 @@ def eval(self) -> Optional[chess.engine.PovScore]:
                 # who has been mated.
                 return chess.engine.PovScore(score, turn)
         else:
-            score = chess.engine.Cp(int(float(match.group("cp")) * 100))
+            score = chess.engine.Cp(round(float(match.group("cp")) * 100))
 
         return chess.engine.PovScore(score if turn else -score, turn)
 
diff --git a/test.py b/test.py
index b9be057e1..29ea02749 100755
--- a/test.py
+++ b/test.py
@@ -2806,6 +2806,12 @@ def test_annotations(self):
         game.set_arrows([])
         self.assertEqual(game.comment, "foo [%bar] baz")
 
+    def test_eval(self):
+        game = chess.pgn.Game()
+        for cp in range(199, 220):
+            game.set_eval(chess.engine.PovScore(chess.engine.Cp(cp), chess.WHITE))
+            self.assertEqual(game.eval().white().cp, cp)
+
     def test_float_emt(self):
         game = chess.pgn.Game()
         game.comment = "[%emt 0:00:01.234]"

From 8628abbb65386f6622cf38d519209e123a654b8b Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 29 Dec 2022 21:50:24 +0100
Subject: [PATCH 356/613] Keep misc PGN headers in insertion order

---
 chess/pgn.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index f802a780f..1a01b034e 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -810,11 +810,11 @@ def setup(self, board: Union[chess.Board, str]) -> None:
             fen = setup.fen()
 
         if fen == type(setup).starting_fen:
-            self.headers.pop("SetUp", None)
             self.headers.pop("FEN", None)
+            self.headers.pop("SetUp", None)
         else:
-            self.headers["SetUp"] = "1"
             self.headers["FEN"] = fen
+            self.headers["SetUp"] = "1"
 
         if type(setup).aliases[0] == "Standard" and setup.chess960:
             self.headers["Variant"] = "Chess960"
@@ -957,7 +957,7 @@ def __iter__(self) -> Iterator[str]:
             if key in self._tag_roster:
                 yield key
 
-        yield from sorted(self._others)
+        yield from self._others
 
     def __len__(self) -> int:
         return len(self._tag_roster) + len(self._others)

From 6e1f435ba60536a1d36728b9309427777f2c5198 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 5 Jan 2023 20:16:10 +0100
Subject: [PATCH 357/613] Try Sphinx 6.x

---
 docs/requirements.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/requirements.txt b/docs/requirements.txt
index dd8706637..f18b82961 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1 @@
-Sphinx==5.3.0
+Sphinx==6.1.1

From b3e634d21e7b0c4262da89a766f1dd1a00a2baa2 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 5 Jan 2023 20:21:27 +0100
Subject: [PATCH 358/613] Fix indent of :raises: lists

---
 chess/__init__.py | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 883d5fbda..e205bba8e 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -2987,9 +2987,10 @@ def parse_san(self, san: str) -> Move:
 
         :raises:
             :exc:`ValueError` (specifically an exception specified below) if the SAN is invalid, illegal or ambiguous.
-                - :exc:`InvalidMoveError` if the SAN is syntactically invalid.
-                - :exc:`IllegalMoveError` if the SAN is illegal.
-                - :exc:`AmbiguousMoveError` if the SAN is ambiguous.
+
+            - :exc:`InvalidMoveError` if the SAN is syntactically invalid.
+            - :exc:`IllegalMoveError` if the SAN is illegal.
+            - :exc:`AmbiguousMoveError` if the SAN is ambiguous.
         """
         # Castling.
         try:
@@ -3072,9 +3073,10 @@ def push_san(self, san: str) -> Move:
 
         :raises:
             :exc:`ValueError` (specifically an exception specified below) if neither legal nor a null move.
-                - :exc:`InvalidMoveError` if the SAN is syntactically invalid.
-                - :exc:`IllegalMoveError` if the SAN is illegal.
-                - :exc:`AmbiguousMoveError` if the SAN is ambiguous.
+
+            - :exc:`InvalidMoveError` if the SAN is syntactically invalid.
+            - :exc:`IllegalMoveError` if the SAN is illegal.
+            - :exc:`AmbiguousMoveError` if the SAN is ambiguous.
         """
         move = self.parse_san(san)
         self.push(move)
@@ -3105,8 +3107,9 @@ def parse_uci(self, uci: str) -> Move:
         :raises:
             :exc:`ValueError` (specifically an exception specified below) if the move is invalid or illegal in the
             current position (but not a null move).
-                - :exc:`InvalidMoveError` if the UCI is syntactically invalid.
-                - :exc:`IllegalMoveError` if the UCI is illegal.
+
+            - :exc:`InvalidMoveError` if the UCI is syntactically invalid.
+            - :exc:`IllegalMoveError` if the UCI is illegal.
         """
         move = Move.from_uci(uci)
 
@@ -3130,8 +3133,9 @@ def push_uci(self, uci: str) -> Move:
         :raises:
             :exc:`ValueError` (specifically an exception specified below) if the move is invalid or illegal in the
             current position (but not a null move).
-                - :exc:`InvalidMoveError` if the UCI is syntactically invalid.
-                - :exc:`IllegalMoveError` if the UCI is illegal.
+
+            - :exc:`InvalidMoveError` if the UCI is syntactically invalid.
+            - :exc:`IllegalMoveError` if the UCI is illegal.
         """
         move = self.parse_uci(uci)
         self.push(move)

From d7c3edb0e69fe42db978982e93f0694a9e519f7b Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 7 Jan 2023 20:02:27 +0100
Subject: [PATCH 359/613] Close Syzygy table file descriptors after mmap

---
 chess/syzygy.py | 39 ++++++++++++++++++++-------------------
 1 file changed, 20 insertions(+), 19 deletions(-)

diff --git a/chess/syzygy.py b/chess/syzygy.py
index 0266ea422..28cc9c4d0 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -559,7 +559,6 @@ def __init__(self, path: str, *, variant: Type[chess.Board] = chess.Board) -> No
 
         self.write_lock = threading.RLock()
         self.initialized = False
-        self.fd: Optional[int] = None
         self.data: Optional[mmap.mmap] = None
 
         self.read_condition = threading.Condition()
@@ -602,23 +601,29 @@ def __init__(self, path: str, *, variant: Type[chess.Board] = chess.Board) -> No
                         self.enc_type = 1 + j
 
     def init_mmap(self) -> None:
+        if self.data is not None:
+            return
+
         with self.write_lock:
-            # Open fd.
-            if self.fd is None:
-                self.fd = os.open(self.path, os.O_RDONLY | os.O_BINARY if hasattr(os, "O_BINARY") else os.O_RDONLY)
+            if self.data is not None:
+                return
+
+            fd = os.open(self.path, os.O_RDONLY | os.O_BINARY if hasattr(os, "O_BINARY") else os.O_RDONLY)
+            try:
+                data = mmap.mmap(fd, 0, access=mmap.ACCESS_READ)
+            finally:
+                os.close(fd)
 
-            # Open mmap.
-            if self.data is None:
-                data = mmap.mmap(self.fd, 0, access=mmap.ACCESS_READ)
-                if data.size() % 64 != 16:
-                    raise IOError(f"invalid file size: ensure {self.path!r} is a valid syzygy tablebase file")
-                self.data = data
+            if data.size() % 64 != 16:
+                raise IOError(f"invalid file size: ensure {self.path!r} is a valid syzygy tablebase file")
 
-                try:
-                    # Python 3.8
-                    self.data.madvise(mmap.MADV_RANDOM)
-                except AttributeError:
-                    pass
+            try:
+                # Python 3.8
+                data.madvise(mmap.MADV_RANDOM)
+            except AttributeError:
+                pass
+
+            self.data = data
 
     def check_magic(self, magic: Optional[bytes], pawnless_magic: Optional[bytes]) -> None:
         assert self.data
@@ -1045,10 +1050,6 @@ def close(self) -> None:
                     self.data.close()
                     self.data = None
 
-                if self.fd is not None:
-                    os.close(self.fd)
-                    self.fd = None
-
     def __enter__(self: TableT) -> TableT:
         return self
 

From 9cb8d3ba11183713314f817f6b6ccef18d1bde88 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 7 Jan 2023 20:05:56 +0100
Subject: [PATCH 360/613] Close PolyGlot file descriptors after mmap

---
 chess/polyglot.py | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/chess/polyglot.py b/chess/polyglot.py
index 1562d5306..c56c5ecfb 100644
--- a/chess/polyglot.py
+++ b/chess/polyglot.py
@@ -337,12 +337,13 @@ class MemoryMappedReader:
     """Maps a Polyglot opening book to memory."""
 
     def __init__(self, filename: PathLike) -> None:
-        self.fd = os.open(filename, os.O_RDONLY | os.O_BINARY if hasattr(os, "O_BINARY") else os.O_RDONLY)
-
+        fd = os.open(filename, os.O_RDONLY | os.O_BINARY if hasattr(os, "O_BINARY") else os.O_RDONLY)
         try:
-            self.mmap: Union[mmap.mmap, _EmptyMmap] = mmap.mmap(self.fd, 0, access=mmap.ACCESS_READ)
+            self.mmap: Union[mmap.mmap, _EmptyMmap] = mmap.mmap(fd, 0, access=mmap.ACCESS_READ)
         except (ValueError, OSError):
             self.mmap = _EmptyMmap()  # Workaround for empty opening books.
+        finally:
+            os.close(fd)
 
         if self.mmap.size() % ENTRY_STRUCT.size != 0:
             raise IOError(f"invalid file size: ensure {filename!r} is a valid polyglot opening book")
@@ -514,11 +515,6 @@ def close(self) -> None:
         """Closes the reader."""
         self.mmap.close()
 
-        try:
-            os.close(self.fd)
-        except OSError:
-            pass
-
 
 def open_reader(path: PathLike) -> MemoryMappedReader:
     """

From 3fd11884ee0ae114ab243d9f66da500dff6b9bf6 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 7 Jan 2023 20:20:28 +0100
Subject: [PATCH 361/613] Simplify syzygy.Table.init_mmap()

---
 chess/syzygy.py | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/chess/syzygy.py b/chess/syzygy.py
index 28cc9c4d0..4fe070c91 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -601,13 +601,7 @@ def __init__(self, path: str, *, variant: Type[chess.Board] = chess.Board) -> No
                         self.enc_type = 1 + j
 
     def init_mmap(self) -> None:
-        if self.data is not None:
-            return
-
-        with self.write_lock:
-            if self.data is not None:
-                return
-
+        if self.data is None:
             fd = os.open(self.path, os.O_RDONLY | os.O_BINARY if hasattr(os, "O_BINARY") else os.O_RDONLY)
             try:
                 data = mmap.mmap(fd, 0, access=mmap.ACCESS_READ)

From ebb7b3987715a889f18d0d65382a1f162c261901 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 7 Jan 2023 20:56:50 +0100
Subject: [PATCH 362/613] Change default of Tablebase.max_fds to None

This is compatible thanks to the new implementation, which does not keep
open file descriptors around in any case.
---
 chess/syzygy.py | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/chess/syzygy.py b/chess/syzygy.py
index 4fe070c91..45eb963d0 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -1482,12 +1482,8 @@ def setup_pieces_pawn_dtz(self, p_data: int, p_tb_size: int, f: int) -> None:
 class Tablebase:
     """
     Manages a collection of tablebase files for probing.
-
-    If *max_fds* is not ``None``, will at most use *max_fds* open file
-    descriptors at any given time. The least recently used tables are closed,
-    if necessary.
     """
-    def __init__(self, *, max_fds: Optional[int] = 128, VariantBoard: Type[chess.Board] = chess.Board) -> None:
+    def __init__(self, *, max_fds: Optional[int] = None, VariantBoard: Type[chess.Board] = chess.Board) -> None:
         self.variant = VariantBoard
 
         self.max_fds = max_fds
@@ -1967,7 +1963,7 @@ def __exit__(self, exc_type: Optional[Type[BaseException]], exc_value: Optional[
         self.close()
 
 
-def open_tablebase(directory: str, *, load_wdl: bool = True, load_dtz: bool = True, max_fds: Optional[int] = 128, VariantBoard: Type[chess.Board] = chess.Board) -> Tablebase:
+def open_tablebase(directory: str, *, load_wdl: bool = True, load_dtz: bool = True, max_fds: Optional[int] = None, VariantBoard: Type[chess.Board] = chess.Board) -> Tablebase:
     """
     Opens a collection of tables for probing. See
     :class:`~chess.syzygy.Tablebase`.
@@ -1981,6 +1977,10 @@ def open_tablebase(directory: str, *, load_wdl: bool = True, load_dtz: bool = Tr
         are often distributed separately, but are both required for 6-piece
         positions. Use :func:`~chess.syzygy.Tablebase.add_directory()` to load
         tables from additional directories.
+
+    :param max_fds: If *max_fds* is not ``None``, will at most use *max_fds*
+        open file descriptors at any given time. The least recently used tables
+        are closed, if necessary.
     """
     tables = Tablebase(max_fds=max_fds, VariantBoard=VariantBoard)
     tables.add_directory(directory, load_wdl=load_wdl, load_dtz=load_dtz)

From 1985e6d5acce645354c5c6c8d7d65c0499715953 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 7 Jan 2023 21:09:58 +0100
Subject: [PATCH 363/613] Bump Sphinx to 6.1.2

---
 docs/requirements.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/requirements.txt b/docs/requirements.txt
index f18b82961..8f65fe1fd 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1 @@
-Sphinx==6.1.1
+Sphinx==6.1.2

From 57fce306c93a22c00d3b91cea68c618683987df3 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 20 Jan 2023 20:53:24 +0100
Subject: [PATCH 364/613] Add chess960.perft

---
 .github/workflows/test.yml    |    1 +
 examples/perft/chess960.perft | 8641 +++++++++++++++++++++++++++++++++
 2 files changed, 8642 insertions(+)
 create mode 100644 examples/perft/chess960.perft

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 68ab5bb19..95e9a3728 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -27,6 +27,7 @@ jobs:
           python-version: "3.11"
       - run: pip install -e .
       - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000
+      - run: python examples/perft/perft.py -t 1 examples/perft/chess960.perft --max-nodes 100000
       - run: python examples/perft/perft.py -t 1 examples/perft/tricky.perft
       - run: python examples/perft/perft.py -t 1 --variant giveaway examples/perft/giveaway.perft
       - run: python examples/perft/perft.py -t 1 --variant atomic examples/perft/atomic.perft
diff --git a/examples/perft/chess960.perft b/examples/perft/chess960.perft
new file mode 100644
index 000000000..0d14d5da0
--- /dev/null
+++ b/examples/perft/chess960.perft
@@ -0,0 +1,8641 @@
+# https://www.chessprogramming.org/Chess960_Perft_Results
+
+id 1
+epd bqnb1rkr/pp3ppp/3ppn2/2p5/5P2/P2P4/NPP1P1PP/BQ1BNRKR w HFhf - 2 9
+perft 1 21
+perft 2 528
+perft 3 12189
+perft 4 326672
+perft 5 8146062
+perft 6 227689589
+
+id 1
+epd 2nnrbkr/p1qppppp/8/1ppb4/6PP/3PP3/PPP2P2/BQNNRBKR w HEhe - 1 9
+perft 1 21
+perft 2 807
+perft 3 18002
+perft 4 667366
+perft 5 16253601
+perft 6 590751109
+
+id 1
+epd b1q1rrkb/pppppppp/3nn3/8/P7/1PPP4/4PPPP/BQNNRKRB w GE - 1 9
+perft 1 20
+perft 2 479
+perft 3 10471
+perft 4 273318
+perft 5 6417013
+perft 6 177654692
+
+id 1
+epd qbbnnrkr/2pp2pp/p7/1p2pp2/8/P3PP2/1PPP1KPP/QBBNNR1R w hf - 0 9
+perft 1 22
+perft 2 593
+perft 3 13440
+perft 4 382958
+perft 5 9183776
+perft 6 274103539
+
+id 1
+epd 1nbbnrkr/p1p1ppp1/3p4/1p3P1p/3Pq2P/8/PPP1P1P1/QNBBNRKR w HFhf - 0 9
+perft 1 28
+perft 2 1120
+perft 3 31058
+perft 4 1171749
+perft 5 34030312
+perft 6 1250970898
+
+id 1
+epd qnbnr1kr/ppp1b1pp/4p3/3p1p2/8/2NPP3/PPP1BPPP/QNB1R1KR w HEhe - 1 9
+perft 1 29
+perft 2 899
+perft 3 26578
+perft 4 824055
+perft 5 24851983
+perft 6 775718317
+
+id 1
+epd q1bnrkr1/ppppp2p/2n2p2/4b1p1/2NP4/8/PPP1PPPP/QNB1RRKB w ge - 1 9
+perft 1 30
+perft 2 860
+perft 3 24566
+perft 4 732757
+perft 5 21093346
+perft 6 649209803
+
+id 1
+epd qbn1brkr/ppp1p1p1/2n4p/3p1p2/P7/6PP/QPPPPP2/1BNNBRKR w HFhf - 0 9
+perft 1 25
+perft 2 635
+perft 3 17054
+perft 4 465806
+perft 5 13203304
+perft 6 377184252
+
+id 1
+epd qnnbbrkr/1p2ppp1/2pp3p/p7/1P5P/2NP4/P1P1PPP1/Q1NBBRKR w HFhf - 0 9
+perft 1 24
+perft 2 572
+perft 3 15243
+perft 4 384260
+perft 5 11110203
+perft 6 293989890
+
+id 1
+epd qn1rbbkr/ppp2p1p/1n1pp1p1/8/3P4/P6P/1PP1PPPK/QNNRBB1R w hd - 2 9
+perft 1 28
+perft 2 811
+perft 3 23175
+perft 4 679699
+perft 5 19836606
+perft 6 594527992
+
+id 1
+epd qnr1bkrb/pppp2pp/3np3/5p2/8/P2P2P1/NPP1PP1P/QN1RBKRB w GDg - 3 9
+perft 1 33
+perft 2 823
+perft 3 26895
+perft 4 713420
+perft 5 23114629
+perft 6 646390782
+
+id 1
+epd qb1nrkbr/1pppp1p1/1n3p2/p1B4p/8/3P1P1P/PPP1P1P1/QBNNRK1R w HEhe - 0 9
+perft 1 31
+perft 2 855
+perft 3 25620
+perft 4 735703
+perft 5 21796206
+perft 6 651054626
+
+id 1
+epd qnnbrk1r/1p1ppbpp/2p5/p4p2/2NP3P/8/PPP1PPP1/Q1NBRKBR w HEhe - 0 9
+perft 1 26
+perft 2 790
+perft 3 21238
+perft 4 642367
+perft 5 17819770
+perft 6 544866674
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From 57c9f87cbf8d57d13dce787fe243500adac4a67c Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 20 Jan 2023 21:56:17 +0100
Subject: [PATCH 365/613] Fix ids in chess960.perft

---
 examples/perft/chess960.perft | 1919 +++++++++++++++++----------------
 1 file changed, 960 insertions(+), 959 deletions(-)

diff --git a/examples/perft/chess960.perft b/examples/perft/chess960.perft
index 0d14d5da0..76be26eed 100644
--- a/examples/perft/chess960.perft
+++ b/examples/perft/chess960.perft
@@ -1,6 +1,7 @@
 # https://www.chessprogramming.org/Chess960_Perft_Results
+# https://github.com/AndyGrant/Ethereal/blob/master/src/perft/fischer.epd
 
-id 1
+id 0
 epd bqnb1rkr/pp3ppp/3ppn2/2p5/5P2/P2P4/NPP1P1PP/BQ1BNRKR w HFhf - 2 9
 perft 1 21
 perft 2 528
@@ -18,7 +19,7 @@ perft 4 667366
 perft 5 16253601
 perft 6 590751109
 
-id 1
+id 2
 epd b1q1rrkb/pppppppp/3nn3/8/P7/1PPP4/4PPPP/BQNNRKRB w GE - 1 9
 perft 1 20
 perft 2 479
@@ -27,7 +28,7 @@ perft 4 273318
 perft 5 6417013
 perft 6 177654692
 
-id 1
+id 3
 epd qbbnnrkr/2pp2pp/p7/1p2pp2/8/P3PP2/1PPP1KPP/QBBNNR1R w hf - 0 9
 perft 1 22
 perft 2 593
@@ -36,7 +37,7 @@ perft 4 382958
 perft 5 9183776
 perft 6 274103539
 
-id 1
+id 4
 epd 1nbbnrkr/p1p1ppp1/3p4/1p3P1p/3Pq2P/8/PPP1P1P1/QNBBNRKR w HFhf - 0 9
 perft 1 28
 perft 2 1120
@@ -45,7 +46,7 @@ perft 4 1171749
 perft 5 34030312
 perft 6 1250970898
 
-id 1
+id 5
 epd qnbnr1kr/ppp1b1pp/4p3/3p1p2/8/2NPP3/PPP1BPPP/QNB1R1KR w HEhe - 1 9
 perft 1 29
 perft 2 899
@@ -54,7 +55,7 @@ perft 4 824055
 perft 5 24851983
 perft 6 775718317
 
-id 1
+id 6
 epd q1bnrkr1/ppppp2p/2n2p2/4b1p1/2NP4/8/PPP1PPPP/QNB1RRKB w ge - 1 9
 perft 1 30
 perft 2 860
@@ -63,7 +64,7 @@ perft 4 732757
 perft 5 21093346
 perft 6 649209803
 
-id 1
+id 7
 epd qbn1brkr/ppp1p1p1/2n4p/3p1p2/P7/6PP/QPPPPP2/1BNNBRKR w HFhf - 0 9
 perft 1 25
 perft 2 635
@@ -72,7 +73,7 @@ perft 4 465806
 perft 5 13203304
 perft 6 377184252
 
-id 1
+id 8
 epd qnnbbrkr/1p2ppp1/2pp3p/p7/1P5P/2NP4/P1P1PPP1/Q1NBBRKR w HFhf - 0 9
 perft 1 24
 perft 2 572
@@ -81,7 +82,7 @@ perft 4 384260
 perft 5 11110203
 perft 6 293989890
 
-id 1
+id 9
 epd qn1rbbkr/ppp2p1p/1n1pp1p1/8/3P4/P6P/1PP1PPPK/QNNRBB1R w hd - 2 9
 perft 1 28
 perft 2 811
@@ -90,7 +91,7 @@ perft 4 679699
 perft 5 19836606
 perft 6 594527992
 
-id 1
+id 10
 epd qnr1bkrb/pppp2pp/3np3/5p2/8/P2P2P1/NPP1PP1P/QN1RBKRB w GDg - 3 9
 perft 1 33
 perft 2 823
@@ -99,7 +100,7 @@ perft 4 713420
 perft 5 23114629
 perft 6 646390782
 
-id 1
+id 11
 epd qb1nrkbr/1pppp1p1/1n3p2/p1B4p/8/3P1P1P/PPP1P1P1/QBNNRK1R w HEhe - 0 9
 perft 1 31
 perft 2 855
@@ -108,7 +109,7 @@ perft 4 735703
 perft 5 21796206
 perft 6 651054626
 
-id 1
+id 12
 epd qnnbrk1r/1p1ppbpp/2p5/p4p2/2NP3P/8/PPP1PPP1/Q1NBRKBR w HEhe - 0 9
 perft 1 26
 perft 2 790
@@ -117,7 +118,7 @@ perft 4 642367
 perft 5 17819770
 perft 6 544866674
 
-id 1
+id 13
 epd 1qnrkbbr/1pppppp1/p1n4p/8/P7/1P1N1P2/2PPP1PP/QN1RKBBR w HDhd - 0 9
 perft 1 37
 perft 2 883
@@ -126,7 +127,7 @@ perft 4 815535
 perft 5 29370838
 perft 6 783201510
 
-id 1
+id 14
 epd qn1rkrbb/pp1p1ppp/2p1p3/3n4/4P2P/2NP4/PPP2PP1/Q1NRKRBB w FDfd - 1 9
 perft 1 24
 perft 2 585
@@ -135,7 +136,7 @@ perft 4 356950
 perft 5 9482310
 perft 6 233468620
 
-id 1
+id 15
 epd bb1qnrkr/pp1p1pp1/1np1p3/4N2p/8/1P4P1/P1PPPP1P/BBNQ1RKR w HFhf - 0 9
 perft 1 29
 perft 2 864
@@ -144,7 +145,7 @@ perft 4 799727
 perft 5 24219627
 perft 6 776836316
 
-id 1
+id 16
 epd bnqbnr1r/p1p1ppkp/3p4/1p4p1/P7/3NP2P/1PPP1PP1/BNQB1RKR w HF - 0 9
 perft 1 26
 perft 2 889
@@ -153,7 +154,7 @@ perft 4 832956
 perft 5 23701014
 perft 6 809194268
 
-id 1
+id 17
 epd bnqnrbkr/1pp2pp1/p7/3pP2p/4P1P1/8/PPPP3P/BNQNRBKR w HEhe d6 0 9
 perft 1 31
 perft 2 984
@@ -162,7 +163,7 @@ perft 4 962591
 perft 5 29032175
 perft 6 1008880643
 
-id 1
+id 18
 epd b1qnrrkb/ppp1pp1p/n2p1Pp1/8/8/P7/1PPPP1PP/BNQNRKRB w GE - 0 9
 perft 1 20
 perft 2 484
@@ -171,7 +172,7 @@ perft 4 281606
 perft 5 6718715
 perft 6 193594729
 
-id 1
+id 19
 epd n1bqnrkr/pp1ppp1p/2p5/6p1/2P2b2/PN6/1PNPPPPP/1BBQ1RKR w HFhf - 2 9
 perft 1 23
 perft 2 732
@@ -180,7 +181,7 @@ perft 4 558191
 perft 5 14481581
 perft 6 457140569
 
-id 1
+id 20
 epd n1bb1rkr/qpnppppp/2p5/p7/P1P5/5P2/1P1PPRPP/NQBBN1KR w Hhf - 1 9
 perft 1 27
 perft 2 697
@@ -189,7 +190,7 @@ perft 4 505089
 perft 5 14226907
 perft 6 400942568
 
-id 1
+id 21
 epd nqb1rbkr/pppppp1p/4n3/6p1/4P3/1NP4P/PP1P1PP1/1QBNRBKR w HEhe - 1 9
 perft 1 28
 perft 2 641
@@ -198,7 +199,7 @@ perft 4 456916
 perft 5 13780398
 perft 6 354122358
 
-id 1
+id 22
 epd n1bnrrkb/pp1pp2p/2p2p2/6p1/5B2/3P4/PPP1PPPP/NQ1NRKRB w GE - 2 9
 perft 1 28
 perft 2 606
@@ -207,7 +208,7 @@ perft 4 381646
 perft 5 10815324
 perft 6 254026570
 
-id 1
+id 23
 epd nbqnbrkr/2ppp1p1/pp3p1p/8/4N2P/1N6/PPPPPPP1/1BQ1BRKR w HFhf - 0 9
 perft 1 26
 perft 2 626
@@ -216,7 +217,7 @@ perft 4 437525
 perft 5 12719546
 perft 6 339132046
 
-id 1
+id 24
 epd nq1bbrkr/pp2nppp/2pp4/4p3/1PP1P3/1B6/P2P1PPP/NQN1BRKR w HFhf - 2 9
 perft 1 21
 perft 2 504
@@ -225,7 +226,7 @@ perft 4 302230
 perft 5 7697880
 perft 6 207028745
 
-id 1
+id 25
 epd nqnrb1kr/2pp1ppp/1p1bp3/p1B5/5P2/3N4/PPPPP1PP/NQ1R1BKR w HDhd - 0 9
 perft 1 30
 perft 2 672
@@ -234,7 +235,7 @@ perft 4 465317
 perft 5 13454573
 perft 6 345445468
 
-id 1
+id 26
 epd nqn2krb/p1prpppp/1pbp4/7P/5P2/8/PPPPPKP1/NQNRB1RB w g - 3 9
 perft 1 21
 perft 2 461
@@ -243,7 +244,7 @@ perft 4 248069
 perft 5 6194124
 perft 6 152861936
 
-id 1
+id 27
 epd nb1n1kbr/ppp1rppp/3pq3/P3p3/8/4P3/1PPPRPPP/NBQN1KBR w Hh - 1 9
 perft 1 19
 perft 2 566
@@ -252,7 +253,7 @@ perft 4 358337
 perft 5 8047916
 perft 6 249171636
 
-id 1
+id 28
 epd nqnbrkbr/1ppppp1p/p7/6p1/6P1/P6P/1PPPPP2/NQNBRKBR w HEhe - 1 9
 perft 1 20
 perft 2 382
@@ -261,7 +262,7 @@ perft 4 187263
 perft 5 4708975
 perft 6 112278808
 
-id 1
+id 29
 epd nq1rkb1r/pp1pp1pp/1n2bp1B/2p5/8/5P1P/PPPPP1P1/NQNRKB1R w HDhd - 2 9
 perft 1 24
 perft 2 809
@@ -270,7 +271,7 @@ perft 4 673811
 perft 5 17647882
 perft 6 593457788
 
-id 1
+id 30
 epd nqnrkrb1/pppppp2/7p/4b1p1/8/PN1NP3/1PPP1PPP/1Q1RKRBB w FDfd - 1 9
 perft 1 26
 perft 2 683
@@ -279,7 +280,7 @@ perft 4 473911
 perft 5 13055173
 perft 6 352398011
 
-id 1
+id 31
 epd bb1nqrkr/1pp1ppp1/pn5p/3p4/8/P2NNP2/1PPPP1PP/BB2QRKR w HFhf - 0 9
 perft 1 29
 perft 2 695
@@ -288,7 +289,7 @@ perft 4 552634
 perft 5 17454857
 perft 6 483785639
 
-id 1
+id 32
 epd bnn1qrkr/pp1ppp1p/2p5/b3Q1p1/8/5P1P/PPPPP1P1/BNNB1RKR w HFhf - 2 9
 perft 1 44
 perft 2 920
@@ -297,7 +298,7 @@ perft 4 795317
 perft 5 29742670
 perft 6 702867204
 
-id 1
+id 33
 epd bnnqrbkr/pp1p2p1/2p1p2p/5p2/1P5P/1R6/P1PPPPP1/BNNQRBK1 w Ehe - 0 9
 perft 1 33
 perft 2 1022
@@ -306,7 +307,7 @@ perft 4 1024721
 perft 5 32898113
 perft 6 1047360456
 
-id 1
+id 34
 epd b1nqrkrb/2pppppp/p7/1P6/1n6/P4P2/1P1PP1PP/BNNQRKRB w GEge - 0 9
 perft 1 23
 perft 2 638
@@ -315,7 +316,7 @@ perft 4 446539
 perft 5 11735969
 perft 6 344211589
 
-id 1
+id 35
 epd n1bnqrkr/3ppppp/1p6/pNp1b3/2P3P1/8/PP1PPP1P/NBB1QRKR w HFhf - 1 9
 perft 1 29
 perft 2 728
@@ -324,7 +325,7 @@ perft 4 532084
 perft 5 15621236
 perft 6 415766465
 
-id 1
+id 36
 epd n2bqrkr/p1p1pppp/1pn5/3p1b2/P6P/1NP5/1P1PPPP1/1NBBQRKR w HFhf - 3 9
 perft 1 20
 perft 2 533
@@ -333,7 +334,7 @@ perft 4 325059
 perft 5 8088751
 perft 6 223068417
 
-id 1
+id 37
 epd nnbqrbkr/1pp1p1p1/p2p4/5p1p/2P1P3/N7/PPQP1PPP/N1B1RBKR w HEhe - 0 9
 perft 1 27
 perft 2 619
@@ -342,7 +343,7 @@ perft 4 444421
 perft 5 13755384
 perft 6 357222394
 
-id 1
+id 38
 epd nnbqrkr1/pp1pp2p/2p2b2/5pp1/1P5P/4P1P1/P1PP1P2/NNBQRKRB w GEge - 1 9
 perft 1 32
 perft 2 1046
@@ -351,7 +352,7 @@ perft 4 1111186
 perft 5 36218182
 perft 6 1202830851
 
-id 1
+id 39
 epd nb1qbrkr/p1pppp2/1p1n2pp/8/1P6/2PN3P/P2PPPP1/NB1QBRKR w HFhf - 0 9
 perft 1 25
 perft 2 521
@@ -360,7 +361,7 @@ perft 4 306427
 perft 5 8697700
 perft 6 201455191
 
-id 1
+id 40
 epd nnq1brkr/pp1pppp1/8/2p4P/8/5K2/PPPbPP1P/NNQBBR1R w hf - 0 9
 perft 1 23
 perft 2 724
@@ -369,7 +370,7 @@ perft 4 571072
 perft 5 15338230
 perft 6 484638597
 
-id 1
+id 41
 epd nnqrbb1r/pppppk2/5pp1/7p/1P6/3P2PP/P1P1PP2/NNQRBBKR w HD - 0 9
 perft 1 30
 perft 2 717
@@ -378,7 +379,7 @@ perft 4 547145
 perft 5 17166700
 perft 6 450069742
 
-id 1
+id 42
 epd nnqr1krb/p1p1pppp/2bp4/8/1p1P4/4P3/PPP2PPP/NNQRBKRB w GDgd - 0 9
 perft 1 25
 perft 2 873
@@ -387,7 +388,7 @@ perft 4 728628
 perft 5 18162741
 perft 6 641708630
 
-id 1
+id 43
 epd nbnqrkbr/p2ppp2/1p4p1/2p4p/3P3P/3N4/PPP1PPPR/NB1QRKB1 w Ehe - 0 9
 perft 1 24
 perft 2 589
@@ -396,7 +397,7 @@ perft 4 382317
 perft 5 10630667
 perft 6 279474189
 
-id 1
+id 44
 epd n1qbrkbr/p1ppp2p/2n2pp1/1p6/1P6/2P3P1/P2PPP1P/NNQBRKBR w HEhe - 0 9
 perft 1 22
 perft 2 592
@@ -405,7 +406,7 @@ perft 4 401976
 perft 5 10356818
 perft 6 301583306
 
-id 1
+id 45
 epd 2qrkbbr/ppn1pppp/n1p5/3p4/5P2/P1PP4/1P2P1PP/NNQRKBBR w HDhd - 1 9
 perft 1 27
 perft 2 750
@@ -414,7 +415,7 @@ perft 4 605458
 perft 5 16819085
 perft 6 516796736
 
-id 1
+id 46
 epd 1nqr1rbb/pppkp1pp/1n3p2/3p4/1P6/5P1P/P1PPPKP1/NNQR1RBB w - - 1 9
 perft 1 24
 perft 2 623
@@ -423,7 +424,7 @@ perft 4 429446
 perft 5 11594634
 perft 6 322745925
 
-id 1
+id 47
 epd bbn1rqkr/pp1pp2p/4npp1/2p5/1P6/2BPP3/P1P2PPP/1BNNRQKR w HEhe - 0 9
 perft 1 23
 perft 2 730
@@ -432,7 +433,7 @@ perft 4 565340
 perft 5 14496370
 perft 6 468608864
 
-id 1
+id 48
 epd bn1brqkr/pppp2p1/3npp2/7p/PPP5/8/3PPPPP/BNNBRQKR w HEhe - 0 9
 perft 1 25
 perft 2 673
@@ -441,7 +442,7 @@ perft 4 513696
 perft 5 14284338
 perft 6 434008567
 
-id 1
+id 49
 epd bn1rqbkr/ppp1ppp1/1n6/2p4p/7P/3P4/PPP1PPP1/BN1RQBKR w HDhd - 0 9
 perft 1 25
 perft 2 776
@@ -450,7 +451,7 @@ perft 4 660217
 perft 5 18486027
 perft 6 616653869
 
-id 1
+id 50
 epd bnnr1krb/ppp2ppp/3p4/3Bp3/q1P3PP/8/PP1PPP2/BNNRQKR1 w GDgd - 0 9
 perft 1 29
 perft 2 1040
@@ -459,7 +460,7 @@ perft 4 1053113
 perft 5 31801525
 perft 6 1075147725
 
-id 1
+id 51
 epd 1bbnrqkr/pp1ppppp/8/2p5/n7/3PNPP1/PPP1P2P/NBB1RQKR w HEhe - 1 9
 perft 1 24
 perft 2 598
@@ -468,7 +469,7 @@ perft 4 409766
 perft 5 11394778
 perft 6 310589129
 
-id 1
+id 52
 epd nnbbrqkr/p2ppp1p/1pp5/8/6p1/N1P5/PPBPPPPP/N1B1RQKR w HEhe - 0 9
 perft 1 26
 perft 2 530
@@ -477,7 +478,7 @@ perft 4 326312
 perft 5 8846766
 perft 6 229270702
 
-id 1
+id 53
 epd nnbrqbkr/2p1p1pp/p4p2/1p1p4/8/NP6/P1PPPPPP/N1BRQBKR w HDhd - 0 9
 perft 1 17
 perft 2 496
@@ -486,7 +487,7 @@ perft 4 303310
 perft 5 7103549
 perft 6 217108001
 
-id 1
+id 54
 epd nnbrqk1b/pp2pprp/2pp2p1/8/3PP1P1/8/PPP2P1P/NNBRQRKB w d - 1 9
 perft 1 33
 perft 2 820
@@ -495,7 +496,7 @@ perft 4 706784
 perft 5 24714401
 perft 6 645835197
 
-id 1
+id 55
 epd 1bnrbqkr/ppnpp1p1/2p2p1p/8/1P6/4PPP1/P1PP3P/NBNRBQKR w HDhd - 0 9
 perft 1 27
 perft 2 705
@@ -504,7 +505,7 @@ perft 4 548680
 perft 5 15964771
 perft 6 464662032
 
-id 1
+id 56
 epd n1rbbqkr/pp1pppp1/7p/P1p5/1n6/2PP4/1P2PPPP/NNRBBQKR w HChc - 0 9
 perft 1 22
 perft 2 631
@@ -513,7 +514,7 @@ perft 4 431801
 perft 5 10911545
 perft 6 320838556
 
-id 1
+id 57
 epd n1rqb1kr/p1pppp1p/1pn4b/3P2p1/P7/1P6/2P1PPPP/NNRQBBKR w HChc - 0 9
 perft 1 24
 perft 2 477
@@ -522,7 +523,7 @@ perft 4 263189
 perft 5 7419372
 perft 6 165945904
 
-id 1
+id 58
 epd nnrqbkrb/pppp1pp1/7p/4p3/6P1/2N2B2/PPPPPP1P/NR1QBKR1 w Ggc - 2 9
 perft 1 29
 perft 2 658
@@ -531,7 +532,7 @@ perft 4 476620
 perft 5 14233587
 perft 6 373744834
 
-id 1
+id 59
 epd n1nrqkbr/ppb2ppp/3pp3/2p5/2P3P1/5P2/PP1PPB1P/NBNRQK1R w HDhd - 1 9
 perft 1 32
 perft 2 801
@@ -540,7 +541,7 @@ perft 4 681428
 perft 5 22318948
 perft 6 619857455
 
-id 1
+id 60
 epd 2rbqkbr/p1pppppp/1nn5/1p6/7P/P4P2/1PPPP1PB/NNRBQK1R w HChc - 2 9
 perft 1 27
 perft 2 647
@@ -549,7 +550,7 @@ perft 4 458057
 perft 5 13189156
 perft 6 354689323
 
-id 1
+id 61
 epd nn1qkbbr/pp2ppp1/2rp4/2p4p/P2P4/1N5P/1PP1PPP1/1NRQKBBR w HCh - 1 9
 perft 1 24
 perft 2 738
@@ -558,7 +559,7 @@ perft 4 586009
 perft 5 16420659
 perft 6 519075930
 
-id 1
+id 62
 epd nnrqk1bb/p1ppp2p/5rp1/1p3p2/1P4P1/5P1P/P1PPP3/NNRQKRBB w FCc - 1 9
 perft 1 25
 perft 2 795
@@ -567,7 +568,7 @@ perft 4 648945
 perft 5 17342527
 perft 6 556144017
 
-id 1
+id 63
 epd bb1nrkqr/ppppn2p/4ppp1/8/1P4P1/4P3/P1PPKP1P/BBNNR1QR w he - 0 9
 perft 1 29
 perft 2 664
@@ -576,7 +577,7 @@ perft 4 498376
 perft 5 15373803
 perft 6 406016364
 
-id 1
+id 64
 epd bnnbrkqr/1p1ppp2/8/p1p3pp/1P6/N4P2/PBPPP1PP/2NBRKQR w HEhe - 0 9
 perft 1 31
 perft 2 770
@@ -585,7 +586,7 @@ perft 4 677212
 perft 5 22562080
 perft 6 662029574
 
-id 1
+id 65
 epd 1nnrkbqr/p1pp1ppp/4p3/1p6/1Pb1P3/6PB/P1PP1P1P/BNNRK1QR w HDhd - 0 9
 perft 1 27
 perft 2 776
@@ -594,7 +595,7 @@ perft 4 641002
 perft 5 19153245
 perft 6 562738257
 
-id 1
+id 66
 epd bnr1kqrb/pppp1pp1/1n5p/4p3/P3P3/3P2P1/1PP2P1P/BNNRKQRB w GDg - 0 9
 perft 1 26
 perft 2 624
@@ -603,7 +604,7 @@ perft 4 435426
 perft 5 11906515
 perft 6 338092952
 
-id 1
+id 67
 epd nbbnrkqr/p1ppp1pp/1p3p2/8/2P5/4P3/PP1P1PPP/NBBNRKQR w HEhe - 1 9
 perft 1 25
 perft 2 624
@@ -612,7 +613,7 @@ perft 4 419635
 perft 5 10817378
 perft 6 311138112
 
-id 1
+id 68
 epd nn1brkqr/pp1bpppp/8/2pp4/P4P2/1PN5/2PPP1PP/N1BBRKQR w HEhe - 1 9
 perft 1 23
 perft 2 659
@@ -621,7 +622,7 @@ perft 4 476567
 perft 5 13242252
 perft 6 373557073
 
-id 1
+id 69
 epd n1brkbqr/ppp1pp1p/6pB/3p4/2Pn4/8/PP2PPPP/NN1RKBQR w HDhd - 0 9
 perft 1 32
 perft 2 1026
@@ -630,7 +631,7 @@ perft 4 978278
 perft 5 29436320
 perft 6 957904151
 
-id 1
+id 70
 epd nnbrkqrb/p2ppp2/Q5pp/1pp5/4PP2/2N5/PPPP2PP/N1BRK1RB w GDgd - 0 9
 perft 1 36
 perft 2 843
@@ -639,7 +640,7 @@ perft 4 715537
 perft 5 24321197
 perft 6 630396940
 
-id 1
+id 71
 epd nbnrbk1r/pppppppq/8/7p/8/1N2QPP1/PPPPP2P/NB1RBK1R w HDhd - 2 9
 perft 1 36
 perft 2 973
@@ -648,7 +649,7 @@ perft 4 1018054
 perft 5 37143354
 perft 6 1124883780
 
-id 1
+id 72
 epd nnrbbkqr/2pppp1p/p7/6p1/1p2P3/4QPP1/PPPP3P/NNRBBK1R w HChc - 0 9
 perft 1 36
 perft 2 649
@@ -657,7 +658,7 @@ perft 4 489526
 perft 5 16836636
 perft 6 416139320
 
-id 1
+id 73
 epd nnrkbbqr/1p2pppp/p2p4/2p5/8/1N2P1P1/PPPP1P1P/1NKRBBQR w hc - 0 9
 perft 1 26
 perft 2 672
@@ -666,7 +667,7 @@ perft 4 477801
 perft 5 13342771
 perft 6 363074681
 
-id 1
+id 74
 epd n1rkbqrb/pp1ppp2/2n3p1/2p4p/P5PP/1P6/2PPPP2/NNRKBQRB w GCgc - 0 9
 perft 1 24
 perft 2 804
@@ -675,7 +676,7 @@ perft 4 684001
 perft 5 18761475
 perft 6 617932151
 
-id 1
+id 75
 epd nbkr1qbr/1pp1pppp/pn1p4/8/3P2P1/5R2/PPP1PP1P/NBN1KQBR w H - 2 9
 perft 1 30
 perft 2 627
@@ -684,7 +685,7 @@ perft 4 423329
 perft 5 12815016
 perft 6 312798696
 
-id 1
+id 76
 epd nnr1kqbr/pp1pp1p1/2p5/b4p1p/P7/1PNP4/2P1PPPP/N1RBKQBR w HChc - 1 9
 perft 1 12
 perft 2 421
@@ -693,7 +694,7 @@ perft 4 227044
 perft 5 4266410
 perft 6 149176979
 
-id 1
+id 77
 epd n1rkqbbr/p1pp1pp1/np2p2p/8/8/N4PP1/PPPPP1BP/N1RKQ1BR w HChc - 0 9
 perft 1 27
 perft 2 670
@@ -702,7 +703,7 @@ perft 4 494690
 perft 5 14708490
 perft 6 397268628
 
-id 1
+id 78
 epd nnr1qrbb/p2kpppp/1p1p4/2p5/6P1/PP1P4/2P1PP1P/NNRKQRBB w FC - 0 9
 perft 1 27
 perft 2 604
@@ -711,7 +712,7 @@ perft 4 409665
 perft 5 11993332
 perft 6 308518181
 
-id 1
+id 79
 epd bbnnrkrq/ppp1pp2/6p1/3p4/7p/7P/PPPPPPP1/BBNNRRKQ w ge - 0 9
 perft 1 20
 perft 2 559
@@ -720,7 +721,7 @@ perft 4 355326
 perft 5 8427161
 perft 6 252274233
 
-id 1
+id 80
 epd bnnbrkr1/ppp2p1p/5q2/3pp1p1/4P3/1N4P1/PPPPRP1P/BN1B1KRQ w Gge - 0 9
 perft 1 26
 perft 2 1036
@@ -729,7 +730,7 @@ perft 4 1028084
 perft 5 28286576
 perft 6 1042120495
 
-id 1
+id 81
 epd bn1rkbrq/1pppppp1/p6p/1n6/3P4/6PP/PPPRPP2/BNN1KBRQ w Ggd - 2 9
 perft 1 29
 perft 2 633
@@ -738,7 +739,7 @@ perft 4 455476
 perft 5 14333034
 perft 6 361900466
 
-id 1
+id 82
 epd b1nrkrqb/1p1npppp/p2p4/2p5/5P2/4P2P/PPPP1RP1/BNNRK1QB w Dfd - 1 9
 perft 1 25
 perft 2 475
@@ -747,7 +748,7 @@ perft 4 270909
 perft 5 7545536
 perft 6 179579818
 
-id 1
+id 83
 epd 1bbnrkrq/ppppppp1/8/7p/1n4P1/1PN5/P1PPPP1P/NBBR1KRQ w Gge - 0 9
 perft 1 30
 perft 2 803
@@ -756,7 +757,7 @@ perft 4 709716
 perft 5 23443854
 perft 6 686365049
 
-id 1
+id 84
 epd nnbbrkrq/2pp1pp1/1p5p/pP2p3/7P/N7/P1PPPPP1/N1BBRKRQ w GEge - 0 9
 perft 1 18
 perft 2 432
@@ -765,7 +766,7 @@ perft 4 242350
 perft 5 6131124
 perft 6 160393505
 
-id 1
+id 85
 epd nnbrkbrq/1pppp1p1/p7/7p/1P2Pp2/BN6/P1PP1PPP/1N1RKBRQ w GDgd - 0 9
 perft 1 27
 perft 2 482
@@ -774,7 +775,7 @@ perft 4 282259
 perft 5 8084701
 perft 6 193484216
 
-id 1
+id 86
 epd n1brkrqb/pppp3p/n3pp2/6p1/3P1P2/N1P5/PP2P1PP/N1BRKRQB w FDfd - 0 9
 perft 1 28
 perft 2 642
@@ -783,7 +784,7 @@ perft 4 471729
 perft 5 14529434
 perft 6 384837696
 
-id 1
+id 87
 epd nbnrbk2/p1pppp1p/1p3qr1/6p1/1B1P4/1N6/PPP1PPPP/1BNR1RKQ w d - 2 9
 perft 1 30
 perft 2 796
@@ -792,7 +793,7 @@ perft 4 687302
 perft 5 20120565
 perft 6 641832725
 
-id 1
+id 88
 epd nnrbbrkq/1pp2ppp/3p4/p3p3/3P1P2/1P2P3/P1P3PP/NNRBBKRQ w GC - 1 9
 perft 1 31
 perft 2 827
@@ -801,7 +802,7 @@ perft 4 663082
 perft 5 19979594
 perft 6 549437308
 
-id 1
+id 89
 epd nnrkbbrq/1pp2p1p/p2pp1p1/2P5/8/8/PP1PPPPP/NNRKBBRQ w Ggc - 0 9
 perft 1 24
 perft 2 762
@@ -810,7 +811,7 @@ perft 4 624598
 perft 5 16838099
 perft 6 555230555
 
-id 1
+id 90
 epd nnr1brqb/1ppkp1pp/8/p2p1p2/1P1P4/N1P5/P3PPPP/N1RKBRQB w FC - 1 9
 perft 1 23
 perft 2 640
@@ -819,7 +820,7 @@ perft 4 444905
 perft 5 11343507
 perft 6 334123513
 
-id 1
+id 91
 epd nbnrkrbq/2ppp2p/p4p2/1P4p1/4PP2/8/1PPP2PP/NBNRKRBQ w FDfd - 0 9
 perft 1 31
 perft 2 826
@@ -828,7 +829,7 @@ perft 4 732175
 perft 5 23555139
 perft 6 686250413
 
-id 1
+id 92
 epd 1nrbkr1q/1pppp1pp/1n6/p4p2/N1b4P/8/PPPPPPPB/N1RBKR1Q w FCfc - 2 9
 perft 1 27
 perft 2 862
@@ -837,7 +838,7 @@ perft 4 755171
 perft 5 22027695
 perft 6 696353497
 
-id 1
+id 93
 epd nnrkrbbq/pppp2pp/8/4pp2/4P3/P7/1PPPBPPP/NNKRR1BQ w c - 0 9
 perft 1 25
 perft 2 792
@@ -846,7 +847,7 @@ perft 4 636041
 perft 5 16473376
 perft 6 532214177
 
-id 1
+id 94
 epd n1rk1qbb/pppprpp1/2n4p/4p3/2PP3P/8/PP2PPP1/NNRKRQBB w ECc - 1 9
 perft 1 25
 perft 2 622
@@ -855,7 +856,7 @@ perft 4 425247
 perft 5 11420973
 perft 6 321855685
 
-id 1
+id 95
 epd bbq1rnkr/pnp1pp1p/1p1p4/6p1/2P5/2Q1P2P/PP1P1PP1/BB1NRNKR w HEhe - 2 9
 perft 1 36
 perft 2 870
@@ -864,7 +865,7 @@ perft 4 811047
 perft 5 28127620
 perft 6 799738334
 
-id 1
+id 96
 epd bq1brnkr/1p1ppp1p/1np5/p5p1/8/1N5P/PPPPPPP1/BQ1BRNKR w HEhe - 0 9
 perft 1 22
 perft 2 588
@@ -873,7 +874,7 @@ perft 4 380068
 perft 5 9359618
 perft 6 273795898
 
-id 1
+id 97
 epd bq1rn1kr/1pppppbp/Nn4p1/8/8/P7/1PPPPPPP/BQ1RNBKR w HDhd - 1 9
 perft 1 24
 perft 2 711
@@ -882,7 +883,7 @@ perft 4 542570
 perft 5 14692779
 perft 6 445827351
 
-id 1
+id 98
 epd bqnr1kr1/pppppp1p/6p1/5n2/4B3/3N2PP/PbPPPP2/BQNR1KR1 w GDgd - 2 9
 perft 1 31
 perft 2 1132
@@ -891,7 +892,7 @@ perft 4 1261476
 perft 5 43256823
 perft 6 1456721391
 
-id 1
+id 99
 epd qbb1rnkr/ppp3pp/4n3/3ppp2/1P3PP1/8/P1PPPN1P/QBB1RNKR w HEhe - 0 9
 perft 1 28
 perft 2 696
@@ -900,7 +901,7 @@ perft 4 541886
 perft 5 16492398
 perft 6 456983120
 
-id 1
+id 100
 epd qnbbr1kr/pp1ppp1p/4n3/6p1/2p3P1/2PP1P2/PP2P2P/QNBBRNKR w HEhe - 0 9
 perft 1 25
 perft 2 655
@@ -909,7 +910,7 @@ perft 4 450189
 perft 5 11767038
 perft 6 335414976
 
-id 1
+id 101
 epd 1nbrnbkr/p1ppp1pp/1p6/5p2/4q1PP/3P4/PPP1PP2/QNBRNBKR w HDhd - 1 9
 perft 1 30
 perft 2 1162
@@ -918,7 +919,7 @@ perft 4 1217278
 perft 5 36048727
 perft 6 1290346802
 
-id 1
+id 102
 epd q1brnkrb/p1pppppp/n7/1p6/P7/3P1P2/QPP1P1PP/1NBRNKRB w GDgd - 0 9
 perft 1 32
 perft 2 827
@@ -927,7 +928,7 @@ perft 4 718243
 perft 5 23143989
 perft 6 673147648
 
-id 1
+id 103
 epd qbnrb1kr/ppp1pp1p/3p4/2n3p1/1P6/6N1/P1PPPPPP/QBNRB1KR w HDhd - 2 9
 perft 1 29
 perft 2 751
@@ -936,7 +937,7 @@ perft 4 610397
 perft 5 19555214
 perft 6 530475036
 
-id 1
+id 104
 epd q1rbbnkr/pppp1p2/2n3pp/2P1p3/3P4/8/PP1NPPPP/Q1RBBNKR w HChc - 2 9
 perft 1 29
 perft 2 806
@@ -945,7 +946,7 @@ perft 4 687251
 perft 5 21694330
 perft 6 619907316
 
-id 1
+id 105
 epd q1r1bbkr/pnpp1ppp/2n1p3/1p6/2P2P2/2N1N3/PP1PP1PP/Q1R1BBKR w HChc - 2 9
 perft 1 32
 perft 2 1017
@@ -954,7 +955,7 @@ perft 4 986028
 perft 5 31204371
 perft 6 958455898
 
-id 1
+id 106
 epd 2rnbkrb/pqppppp1/1pn5/7p/2P5/P1R5/QP1PPPPP/1N1NBKRB w Ggc - 4 9
 perft 1 26
 perft 2 625
@@ -963,7 +964,7 @@ perft 4 434635
 perft 5 11856964
 perft 6 336672890
 
-id 1
+id 107
 epd qbnr1kbr/p2ppppp/2p5/1p6/4n2P/P4N2/1PPP1PP1/QBNR1KBR w HDhd - 0 9
 perft 1 27
 perft 2 885
@@ -972,7 +973,7 @@ perft 4 767273
 perft 5 21855658
 perft 6 706272554
 
-id 1
+id 108
 epd qnrbnk1r/pp1pp2p/5p2/2pbP1p1/3P4/1P6/P1P2PPP/QNRBNKBR w HChc - 0 9
 perft 1 26
 perft 2 954
@@ -981,7 +982,7 @@ perft 4 892456
 perft 5 24415089
 perft 6 866744329
 
-id 1
+id 109
 epd qnrnk1br/p1p2ppp/8/1pbpp3/8/PP2N3/1QPPPPPP/1NR1KBBR w HChc - 0 9
 perft 1 26
 perft 2 783
@@ -990,7 +991,7 @@ perft 4 634267
 perft 5 17477825
 perft 6 539674275
 
-id 1
+id 110
 epd qnrnkrbb/Bpppp2p/6p1/5p2/5P2/3PP3/PPP3PP/QNRNKR1B w FCfc - 1 9
 perft 1 28
 perft 2 908
@@ -999,7 +1000,7 @@ perft 4 861240
 perft 5 25251641
 perft 6 869525254
 
-id 1
+id 111
 epd bbnqrn1r/ppppp2k/5p2/6pp/7P/1QP5/PP1PPPP1/B1N1RNKR w HE - 0 9
 perft 1 33
 perft 2 643
@@ -1008,7 +1009,7 @@ perft 4 487109
 perft 5 16693640
 perft 6 410115900
 
-id 1
+id 112
 epd b1qbrnkr/ppp1pp2/2np4/6pp/4P3/2N4P/PPPP1PP1/BQ1BRNKR w HEhe - 0 9
 perft 1 28
 perft 2 837
@@ -1017,7 +1018,7 @@ perft 4 745617
 perft 5 22197063
 perft 6 696399065
 
-id 1
+id 113
 epd bnqr1bkr/pp1ppppp/2p5/4N3/5P2/P7/1PPPPnPP/BNQR1BKR w HDhd - 3 9
 perft 1 25
 perft 2 579
@@ -1026,7 +1027,7 @@ perft 4 341444
 perft 5 8601011
 perft 6 225530258
 
-id 1
+id 114
 epd b1qr1krb/pp1ppppp/n2n4/8/2p5/2P3P1/PP1PPP1P/BNQRNKRB w GDgd - 0 9
 perft 1 28
 perft 2 707
@@ -1035,7 +1036,7 @@ perft 4 549506
 perft 5 15583376
 perft 6 468399900
 
-id 1
+id 115
 epd nbbqr1kr/1pppp1pp/8/p1n2p2/4P3/PN6/1PPPQPPP/1BB1RNKR w HEhe - 0 9
 perft 1 30
 perft 2 745
@@ -1044,7 +1045,7 @@ perft 4 597858
 perft 5 19478789
 perft 6 515473678
 
-id 1
+id 116
 epd nqbbrn1r/p1pppp1k/1p4p1/7p/4P3/1R3B2/PPPP1PPP/NQB2NKR w H - 0 9
 perft 1 24
 perft 2 504
@@ -1053,7 +1054,7 @@ perft 4 317355
 perft 5 9002073
 perft 6 228726497
 
-id 1
+id 117
 epd nqbr1bkr/p1p1ppp1/1p1n4/3pN2p/1P6/8/P1PPPPPP/NQBR1BKR w HDhd - 0 9
 perft 1 29
 perft 2 898
@@ -1062,7 +1063,7 @@ perft 4 809605
 perft 5 24703467
 perft 6 757166494
 
-id 1
+id 118
 epd nqbrn1rb/pppp1kp1/5p1p/4p3/P4B2/3P2P1/1PP1PP1P/NQ1RNKRB w GD - 0 9
 perft 1 34
 perft 2 671
@@ -1071,7 +1072,7 @@ perft 4 473110
 perft 5 15556806
 perft 6 353235120
 
-id 1
+id 119
 epd nb1r1nkr/ppp1ppp1/2bp4/7p/3P2qP/P6R/1PP1PPP1/NBQRBNK1 w Dhd - 1 9
 perft 1 38
 perft 2 1691
@@ -1080,7 +1081,7 @@ perft 4 2526992
 perft 5 88557078
 perft 6 3589649998
 
-id 1
+id 120
 epd n1rbbnkr/1p1pp1pp/p7/2p1qp2/1B3P2/3P4/PPP1P1PP/NQRB1NKR w HChc - 0 9
 perft 1 24
 perft 2 913
@@ -1089,7 +1090,7 @@ perft 4 807544
 perft 5 19866918
 perft 6 737239330
 
-id 1
+id 121
 epd nqrnbbkr/p2p1p1p/1pp5/1B2p1p1/1P3P2/4P3/P1PP2PP/NQRNB1KR w HChc - 0 9
 perft 1 33
 perft 2 913
@@ -1098,7 +1099,7 @@ perft 4 843874
 perft 5 28053260
 perft 6 804687975
 
-id 1
+id 122
 epd nqr1bkrb/ppp1pp2/2np2p1/P6p/8/2P4P/1P1PPPP1/NQRNBKRB w GCgc - 0 9
 perft 1 24
 perft 2 623
@@ -1107,7 +1108,7 @@ perft 4 442531
 perft 5 12681936
 perft 6 351623879
 
-id 1
+id 123
 epd nb1rnkbr/pqppppp1/1p5p/8/1PP4P/8/P2PPPP1/NBQRNKBR w HDhd - 1 9
 perft 1 31
 perft 2 798
@@ -1116,7 +1117,7 @@ perft 4 694386
 perft 5 22616076
 perft 6 666227466
 
-id 1
+id 124
 epd nqrbnkbr/2p1p1pp/3p4/pp3p2/6PP/3P1N2/PPP1PP2/NQRB1KBR w HChc - 0 9
 perft 1 24
 perft 2 590
@@ -1125,7 +1126,7 @@ perft 4 383690
 perft 5 9698432
 perft 6 274064911
 
-id 1
+id 125
 epd nqrnkbbr/pp1p1p1p/4p1p1/1p6/8/5P1P/P1PPP1P1/NQRNKBBR w HChc - 0 9
 perft 1 30
 perft 2 1032
@@ -1134,7 +1135,7 @@ perft 4 1098116
 perft 5 34914919
 perft 6 1233362066
 
-id 1
+id 126
 epd nqrnkrbb/p2ppppp/1p6/2p5/2P3P1/5P2/PP1PPN1P/NQR1KRBB w FCfc - 1 9
 perft 1 30
 perft 2 775
@@ -1143,7 +1144,7 @@ perft 4 668000
 perft 5 21141738
 perft 6 621142773
 
-id 1
+id 127
 epd bbnrqrk1/pp2pppp/4n3/2pp4/P7/1N5P/BPPPPPP1/B2RQNKR w HD - 2 9
 perft 1 23
 perft 2 708
@@ -1152,7 +1153,7 @@ perft 4 554089
 perft 5 14343443
 perft 6 481405144
 
-id 1
+id 128
 epd bnr1qnkr/p1pp1p1p/1p4p1/4p1b1/2P1P3/1P6/PB1P1PPP/1NRBQNKR w HChc - 1 9
 perft 1 30
 perft 2 931
@@ -1161,7 +1162,7 @@ perft 4 921746
 perft 5 30026687
 perft 6 968109774
 
-id 1
+id 129
 epd b1rqnbkr/ppp1ppp1/3p3p/2n5/P3P3/2NP4/1PP2PPP/B1RQNBKR w HChc - 0 9
 perft 1 24
 perft 2 596
@@ -1170,7 +1171,7 @@ perft 4 396123
 perft 5 11099382
 perft 6 294180723
 
-id 1
+id 130
 epd bnrqnr1b/pp1pkppp/2p1p3/P7/2P5/7P/1P1PPPP1/BNRQNKRB w GC - 0 9
 perft 1 24
 perft 2 572
@@ -1179,7 +1180,7 @@ perft 4 390903
 perft 5 11208688
 perft 6 302955778
 
-id 1
+id 131
 epd n1brq1kr/bppppppp/p7/8/4P1Pn/8/PPPP1P2/NBBRQNKR w HDhd - 0 9
 perft 1 20
 perft 2 570
@@ -1188,7 +1189,7 @@ perft 4 371247
 perft 5 9919113
 perft 6 284592289
 
-id 1
+id 132
 epd 1rbbqnkr/ppn1ppp1/3p3p/2p5/3P4/1N4P1/PPPBPP1P/1R1BQNKR w HBhb - 0 9
 perft 1 29
 perft 2 1009
@@ -1197,7 +1198,7 @@ perft 4 1040816
 perft 5 31059587
 perft 6 1111986835
 
-id 1
+id 133
 epd nrbq2kr/ppppppb1/5n1p/5Pp1/8/P5P1/1PPPP2P/NRBQNBKR w HBhb - 1 9
 perft 1 20
 perft 2 520
@@ -1206,7 +1207,7 @@ perft 4 316332
 perft 5 7809837
 perft 6 216997152
 
-id 1
+id 134
 epd nrb1nkrb/pp3ppp/1qBpp3/2p5/8/P5P1/1PPPPP1P/NRBQNKR1 w GBgb - 2 9
 perft 1 32
 perft 2 850
@@ -1215,7 +1216,7 @@ perft 4 734088
 perft 5 21981567
 perft 6 664886187
 
-id 1
+id 135
 epd 1br1bnkr/ppqppp1p/1np3p1/8/1PP4P/4N3/P2PPPP1/NBRQB1KR w HChc - 1 9
 perft 1 32
 perft 2 798
@@ -1224,7 +1225,7 @@ perft 4 691488
 perft 5 22076141
 perft 6 670296871
 
-id 1
+id 136
 epd nrqbb1kr/1p1pp1pp/2p3n1/p4p2/3PP3/P5N1/1PP2PPP/NRQBB1KR w HBhb - 0 9
 perft 1 32
 perft 2 791
@@ -1233,7 +1234,7 @@ perft 4 684890
 perft 5 23239122
 perft 6 634260266
 
-id 1
+id 137
 epd nrqn1bkr/ppppp1pp/4b3/8/4P1p1/5P2/PPPP3P/NRQNBBKR w HBhb - 0 9
 perft 1 29
 perft 2 687
@@ -1242,7 +1243,7 @@ perft 4 506088
 perft 5 15236287
 perft 6 398759980
 
-id 1
+id 138
 epd nrqnbrkb/pppp1p2/4p2p/3B2p1/8/1P4P1/PQPPPP1P/NR1NBKR1 w GB - 0 9
 perft 1 37
 perft 2 764
@@ -1251,7 +1252,7 @@ perft 4 610950
 perft 5 21284835
 perft 6 514864869
 
-id 1
+id 139
 epd nbrq1kbr/Bp3ppp/2pnp3/3p4/5P2/2P4P/PP1PP1P1/NBRQNK1R w HChc - 0 9
 perft 1 40
 perft 2 1271
@@ -1260,7 +1261,7 @@ perft 4 1547741
 perft 5 56588117
 perft 6 1850696281
 
-id 1
+id 140
 epd nrqbnkbr/1p2ppp1/p1p4p/3p4/1P6/8/PQPPPPPP/1RNBNKBR w HBhb - 0 9
 perft 1 28
 perft 2 757
@@ -1269,7 +1270,7 @@ perft 4 668025
 perft 5 21427496
 perft 6 650939962
 
-id 1
+id 141
 epd nrqn1bbr/2ppkppp/4p3/pB6/8/2P1P3/PP1P1PPP/NRQNK1BR w HB - 1 9
 perft 1 27
 perft 2 642
@@ -1278,7 +1279,7 @@ perft 4 442653
 perft 5 11872805
 perft 6 327545120
 
-id 1
+id 142
 epd nrqnkrb1/p1ppp2p/1p4p1/4bp2/4PP1P/4N3/PPPP2P1/NRQ1KRBB w FBfb - 1 9
 perft 1 27
 perft 2 958
@@ -1287,7 +1288,7 @@ perft 4 960350
 perft 5 28520172
 perft 6 995356563
 
-id 1
+id 143
 epd 1bnrnqkr/pbpp2pp/8/1p2pp2/P6P/3P1N2/1PP1PPP1/BBNR1QKR w HDhd - 0 9
 perft 1 27
 perft 2 859
@@ -1296,7 +1297,7 @@ perft 4 773232
 perft 5 21581178
 perft 6 732696327
 
-id 1
+id 144
 epd b1rbnqkr/1pp1ppp1/2n4p/p2p4/5P2/1PBP4/P1P1P1PP/1NRBNQKR w HChc - 0 9
 perft 1 26
 perft 2 545
@@ -1305,7 +1306,7 @@ perft 4 336470
 perft 5 9537260
 perft 6 233549184
 
-id 1
+id 145
 epd 1nrnqbkr/p1pppppp/1p6/8/2b2P2/P1N5/1PP1P1PP/BNR1QBKR w HChc - 2 9
 perft 1 24
 perft 2 668
@@ -1314,7 +1315,7 @@ perft 4 494866
 perft 5 14216070
 perft 6 406225409
 
-id 1
+id 146
 epd 1nrnqkrb/2ppp1pp/p7/1p3p2/5P2/N5K1/PPPPP2P/B1RNQ1RB w gc - 0 9
 perft 1 33
 perft 2 725
@@ -1323,7 +1324,7 @@ perft 4 559823
 perft 5 18547476
 perft 6 471443091
 
-id 1
+id 147
 epd nbbr1qkr/p1pppppp/8/1p1n4/3P4/1N3PP1/PPP1P2P/1BBRNQKR w HDhd - 1 9
 perft 1 28
 perft 2 698
@@ -1332,7 +1333,7 @@ perft 4 539625
 perft 5 16555068
 perft 6 458045505
 
-id 1
+id 148
 epd 1rbbnqkr/1pnppp1p/p5p1/2p5/2P4P/5P2/PP1PP1PR/NRBBNQK1 w Bhb - 1 9
 perft 1 24
 perft 2 554
@@ -1341,7 +1342,7 @@ perft 4 362516
 perft 5 9863080
 perft 6 269284081
 
-id 1
+id 149
 epd nrb1qbkr/2pppppp/2n5/p7/2p5/4P3/PPNP1PPP/1RBNQBKR w HBhb - 0 9
 perft 1 23
 perft 2 618
@@ -1350,7 +1351,7 @@ perft 4 443718
 perft 5 12044358
 perft 6 360311412
 
-id 1
+id 150
 epd nrb1qkrb/2ppppp1/p3n3/1p1B3p/2P5/6P1/PP1PPPRP/NRBNQK2 w Bgb - 2 9
 perft 1 27
 perft 2 593
@@ -1359,7 +1360,7 @@ perft 4 401967
 perft 5 11806808
 perft 6 303338935
 
-id 1
+id 151
 epd nbrn1qkr/ppp1pp2/3p2p1/3Q3P/b7/8/PPPPPP1P/NBRNB1KR w HChc - 2 9
 perft 1 39
 perft 2 1056
@@ -1368,7 +1369,7 @@ perft 4 1133446
 perft 5 42201531
 perft 6 1239888683
 
-id 1
+id 152
 epd nr1bbqkr/pp1pp2p/1n3pp1/2p5/8/1P4P1/P1PPPPQP/NRNBBK1R w hb - 0 9
 perft 1 25
 perft 2 585
@@ -1377,7 +1378,7 @@ perft 4 406544
 perft 5 11582539
 perft 6 320997679
 
-id 1
+id 153
 epd nr2bbkr/ppp1pppp/1n1p4/8/6PP/1NP4q/PP1PPP2/1RNQBBKR w HBhb - 1 9
 perft 1 22
 perft 2 742
@@ -1386,7 +1387,7 @@ perft 4 545231
 perft 5 13287051
 perft 6 457010195
 
-id 1
+id 154
 epd 1rnqbkrb/ppp1p1p1/1n3p2/3p3p/P6P/4P3/1PPP1PP1/NRNQBRKB w gb - 0 9
 perft 1 22
 perft 2 574
@@ -1395,7 +1396,7 @@ perft 4 379648
 perft 5 9968830
 perft 6 281344367
 
-id 1
+id 155
 epd nb1rqkbr/1pppp1pp/4n3/p4p2/6PP/5P2/PPPPPN2/NBR1QKBR w HCh - 0 9
 perft 1 25
 perft 2 621
@@ -1404,7 +1405,7 @@ perft 4 462600
 perft 5 13378840
 perft 6 396575613
 
-id 1
+id 156
 epd nrnbqkbr/2pp2pp/4pp2/pp6/8/1P3P2/P1PPPBPP/NRNBQ1KR w hb - 0 9
 perft 1 25
 perft 2 656
@@ -1413,7 +1414,7 @@ perft 4 466493
 perft 5 12525939
 perft 6 358763789
 
-id 1
+id 157
 epd nrnqkbbr/ppppp1p1/7p/5p2/8/P4PP1/NPPPP2P/NR1QKBBR w HBhb - 0 9
 perft 1 28
 perft 2 723
@@ -1422,7 +1423,7 @@ perft 4 547522
 perft 5 15952533
 perft 6 439046803
 
-id 1
+id 158
 epd 1rnqkr1b/ppppp2p/1n3pp1/8/2P3P1/Pb1N4/1P1PPP1P/NR1QKRBB w FBfb - 0 9
 perft 1 26
 perft 2 713
@@ -1431,7 +1432,7 @@ perft 4 548875
 perft 5 15865528
 perft 6 454532806
 
-id 1
+id 159
 epd bbnrnkqr/1pppp1pp/5p2/p7/7P/1P6/PBPPPPPR/1BNRNKQ1 w D - 2 9
 perft 1 26
 perft 2 649
@@ -1440,7 +1441,7 @@ perft 4 502279
 perft 5 14375839
 perft 6 435585252
 
-id 1
+id 160
 epd bnrbk1qr/1ppp1ppp/p2np3/8/P7/2N2P2/1PPPP1PP/B1RBNKQR w HC - 0 9
 perft 1 26
 perft 2 621
@@ -1449,7 +1450,7 @@ perft 4 451452
 perft 5 13514201
 perft 6 364421088
 
-id 1
+id 161
 epd br1nkbqr/ppppppp1/8/n6p/8/N1P2PP1/PP1PP2P/B1RNKBQR w HCh - 1 9
 perft 1 29
 perft 2 664
@@ -1458,7 +1459,7 @@ perft 4 512316
 perft 5 16125924
 perft 6 442508159
 
-id 1
+id 162
 epd bnr1kqrb/pp1pppp1/2n5/2p5/1P4Pp/4N3/P1PPPP1P/BNKR1QRB w gc - 0 9
 perft 1 36
 perft 2 888
@@ -1467,7 +1468,7 @@ perft 4 789863
 perft 5 27792175
 perft 6 719015345
 
-id 1
+id 163
 epd 1bbrnkqr/pp1p1ppp/2p1p3/1n6/5P2/3Q4/PPPPP1PP/NBBRNK1R w HDhd - 2 9
 perft 1 36
 perft 2 891
@@ -1476,7 +1477,7 @@ perft 4 781792
 perft 5 26998966
 perft 6 702903862
 
-id 1
+id 164
 epd nrbbnk1r/pp2pppq/8/2pp3p/3P2P1/1N6/PPP1PP1P/1RBBNKQR w HBhb - 0 9
 perft 1 29
 perft 2 1036
@@ -1485,7 +1486,7 @@ perft 4 1139166
 perft 5 35627310
 perft 6 1310683359
 
-id 1
+id 165
 epd nr1nkbqr/ppp3pp/5p2/3pp3/6b1/3PP3/PPP2PPP/NRBNKBQR w hb - 0 9
 perft 1 18
 perft 2 664
@@ -1494,7 +1495,7 @@ perft 4 483892
 perft 5 10658989
 perft 6 386307449
 
-id 1
+id 166
 epd nrbnk1rb/ppp1pq1p/3p4/5pp1/2P1P3/1N6/PP1PKPPP/1RBN1QRB w gb - 2 9
 perft 1 25
 perft 2 966
@@ -1503,7 +1504,7 @@ perft 4 920345
 perft 5 23957242
 perft 6 913710194
 
-id 1
+id 167
 epd 1brnbkqr/pppppp2/6p1/7p/1Pn5/P1NP4/2P1PPPP/NBR1BKQR w HChc - 0 9
 perft 1 22
 perft 2 627
@@ -1512,7 +1513,7 @@ perft 4 395829
 perft 5 9627826
 perft 6 285900573
 
-id 1
+id 168
 epd nrnbbk1r/p1pppppq/8/7p/1p6/P5PP/1PPPPPQ1/NRNBBK1R w HBhb - 2 9
 perft 1 29
 perft 2 888
@@ -1521,7 +1522,7 @@ perft 4 874270
 perft 5 27229468
 perft 6 930799376
 
-id 1
+id 169
 epd n1nkb1qr/prppppbp/6p1/1p6/2P2P2/P7/1P1PP1PP/NRNKBBQR w HBh - 1 9
 perft 1 29
 perft 2 804
@@ -1530,7 +1531,7 @@ perft 4 688520
 perft 5 21952444
 perft 6 623156747
 
-id 1
+id 170
 epd nr2bqrb/ppkpp1pp/1np5/5p1P/5P2/2P5/PP1PP1P1/NRNKBQRB w GB - 0 9
 perft 1 22
 perft 2 530
@@ -1539,7 +1540,7 @@ perft 4 347657
 perft 5 9244693
 perft 6 264088392
 
-id 1
+id 171
 epd nbr1kqbr/p3pppp/2ppn3/1p4P1/4P3/1P6/P1PP1P1P/NBRNKQBR w HChc - 1 9
 perft 1 23
 perft 2 555
@@ -1548,7 +1549,7 @@ perft 4 350917
 perft 5 9692630
 perft 6 247479180
 
-id 1
+id 172
 epd nr1bkqbr/1p1pp1pp/pnp2p2/8/6P1/P1PP4/1P2PP1P/NRNBKQBR w HBhb - 0 9
 perft 1 22
 perft 2 565
@@ -1557,7 +1558,7 @@ perft 4 365663
 perft 5 9305533
 perft 6 268612479
 
-id 1
+id 173
 epd nr1kqbbr/np2pppp/p1p5/1B1p1P2/8/4P3/PPPP2PP/NRNKQ1BR w HBhb - 0 9
 perft 1 32
 perft 2 730
@@ -1566,7 +1567,7 @@ perft 4 556995
 perft 5 18103280
 perft 6 454569900
 
-id 1
+id 174
 epd nrnk1rbb/p1p2ppp/3pq3/Qp2p3/1P1P4/8/P1P1PPPP/NRN1KRBB w fb - 2 9
 perft 1 28
 perft 2 873
@@ -1575,7 +1576,7 @@ perft 4 791823
 perft 5 23868737
 perft 6 747991356
 
-id 1
+id 175
 epd bbnrnkrq/pp1ppp1p/6p1/2p5/6P1/P5RP/1PPPPP2/BBNRNK1Q w Dgd - 3 9
 perft 1 37
 perft 2 1260
@@ -1584,7 +1585,7 @@ perft 4 1542086
 perft 5 54843403
 perft 6 1898432768
 
-id 1
+id 176
 epd bnrb1rkq/ppnpppp1/3Q4/2p4p/7P/N7/PPPPPPP1/B1RBNKR1 w GC - 2 9
 perft 1 38
 perft 2 878
@@ -1593,7 +1594,7 @@ perft 4 800440
 perft 5 28784300
 perft 6 784569826
 
-id 1
+id 177
 epd bnrnkbrq/p1ppppp1/1p5p/8/P2PP3/5P2/1PP3PP/BNRNKBRQ w GCgc - 1 9
 perft 1 26
 perft 2 617
@@ -1602,7 +1603,7 @@ perft 4 419099
 perft 5 11965544
 perft 6 311309576
 
-id 1
+id 178
 epd bnrnkrqb/pp2p2p/2pp1pp1/8/P7/2PP1P2/1P2P1PP/BNRNKRQB w FCfc - 0 9
 perft 1 26
 perft 2 721
@@ -1611,7 +1612,7 @@ perft 4 560824
 perft 5 15966934
 perft 6 467132503
 
-id 1
+id 179
 epd nbbrnkr1/1pppp1p1/p6q/P4p1p/8/5P2/1PPPP1PP/NBBRNRKQ w gd - 2 9
 perft 1 18
 perft 2 556
@@ -1620,7 +1621,7 @@ perft 4 316634
 perft 5 6629293
 perft 6 202528241
 
-id 1
+id 180
 epd nrb1nkrq/2pp1ppp/p4b2/1p2p3/P4B2/3P4/1PP1PPPP/NR1BNRKQ w gb - 0 9
 perft 1 24
 perft 2 562
@@ -1629,7 +1630,7 @@ perft 4 355433
 perft 5 9227883
 perft 6 247634489
 
-id 1
+id 181
 epd nrbnkbrq/p3p1pp/1p6/2pp1P2/8/3PP3/PPP2P1P/NRBNKBRQ w GBgb - 0 9
 perft 1 31
 perft 2 746
@@ -1638,7 +1639,7 @@ perft 4 608523
 perft 5 21019301
 perft 6 542954168
 
-id 1
+id 182
 epd nrbnkrqb/pppp1p1p/4p1p1/8/7P/2P1P3/PPNP1PP1/1RBNKRQB w FBfb - 0 9
 perft 1 20
 perft 2 459
@@ -1647,7 +1648,7 @@ perft 4 242762
 perft 5 5760165
 perft 6 146614723
 
-id 1
+id 183
 epd nbrn1krq/ppp1p2p/6b1/3p1pp1/8/4N1PP/PPPPPP2/NBR1BRKQ w gc - 1 9
 perft 1 27
 perft 2 835
@@ -1656,7 +1657,7 @@ perft 4 766397
 perft 5 22667987
 perft 6 760795567
 
-id 1
+id 184
 epd nrnbbkrq/p1pp2pp/5p2/1p6/2P1pP1B/1P6/P2PP1PP/NRNB1KRQ w GBgb - 0 9
 perft 1 24
 perft 2 646
@@ -1665,7 +1666,7 @@ perft 4 444472
 perft 5 11489727
 perft 6 324948755
 
-id 1
+id 185
 epd nrn1bbrq/1ppkppp1/p2p3p/8/1P3N2/4P3/P1PP1PPP/NR1KBBRQ w GB - 2 9
 perft 1 32
 perft 2 591
@@ -1674,7 +1675,7 @@ perft 4 381683
 perft 5 12069159
 perft 6 269922838
 
-id 1
+id 186
 epd n1krbrqb/1ppppppp/p7/8/4n3/P4P1P/1PPPPQP1/NRNKBR1B w FB - 2 9
 perft 1 26
 perft 2 639
@@ -1683,7 +1684,7 @@ perft 4 417190
 perft 5 12167153
 perft 6 312633873
 
-id 1
+id 187
 epd n1rnkrbq/1p1ppp1p/8/p1p1b1p1/3PQ1P1/4N3/PPP1PP1P/NBR1KRB1 w FCfc - 0 9
 perft 1 35
 perft 2 1027
@@ -1692,7 +1693,7 @@ perft 4 1040417
 perft 5 35738410
 perft 6 1060661628
 
-id 1
+id 188
 epd nrnbkrbq/2pp1pp1/pp6/4p2p/P7/5PPP/1PPPP3/NRNBKRBQ w FBfb - 0 9
 perft 1 26
 perft 2 628
@@ -1701,7 +1702,7 @@ perft 4 436075
 perft 5 11920087
 perft 6 331498921
 
-id 1
+id 189
 epd 1rnkrbbq/pp1p2pp/1n3p2/1Bp1p3/1P6/1N2P3/P1PP1PPP/1RNKR1BQ w EBeb - 0 9
 perft 1 33
 perft 2 992
@@ -1710,7 +1711,7 @@ perft 4 983481
 perft 5 31703749
 perft 6 980306735
 
-id 1
+id 190
 epd nr1krqbb/p1ppppp1/8/1p5p/1Pn5/5P2/P1PPP1PP/NRNKRQBB w EBeb - 0 9
 perft 1 24
 perft 2 670
@@ -1719,7 +1720,7 @@ perft 4 445492
 perft 5 11371067
 perft 6 325556465
 
-id 1
+id 191
 epd bbq1rkr1/1ppppppp/p1n2n2/8/2P2P2/1P6/PQ1PP1PP/BB1NRKNR w HEe - 3 9
 perft 1 32
 perft 2 794
@@ -1728,7 +1729,7 @@ perft 4 689334
 perft 5 24085223
 perft 6 645633370
 
-id 1
+id 192
 epd b1nbrknr/1qppp1pp/p4p2/1p6/6P1/P2NP3/1PPP1P1P/BQ1BRKNR w HEhe - 1 9
 perft 1 25
 perft 2 663
@@ -1737,7 +1738,7 @@ perft 4 482994
 perft 5 13157826
 perft 6 389603029
 
-id 1
+id 193
 epd bqnrk1nr/pp2ppbp/6p1/2pp4/2P5/5P2/PPQPP1PP/B1NRKBNR w HDhd - 0 9
 perft 1 26
 perft 2 850
@@ -1746,7 +1747,7 @@ perft 4 759768
 perft 5 21341087
 perft 6 719712622
 
-id 1
+id 194
 epd bqnrknrb/1ppp1p1p/p7/6p1/1P2p3/P1PN4/3PPPPP/BQ1RKNRB w GDgd - 0 9
 perft 1 25
 perft 2 721
@@ -1755,7 +1756,7 @@ perft 4 581913
 perft 5 16391601
 perft 6 511725087
 
-id 1
+id 195
 epd q1b1rknr/pp1pppp1/4n2p/2p1b3/1PP5/4P3/PQ1P1PPP/1BBNRKNR w HEhe - 1 9
 perft 1 32
 perft 2 975
@@ -1764,7 +1765,7 @@ perft 4 955493
 perft 5 32649943
 perft 6 962536105
 
-id 1
+id 196
 epd qnbbrknr/1p1ppppp/8/p1p5/5P2/PP1P4/2P1P1PP/QNBBRKNR w HEhe - 0 9
 perft 1 27
 perft 2 573
@@ -1773,7 +1774,7 @@ perft 4 391656
 perft 5 11562434
 perft 6 301166330
 
-id 1
+id 197
 epd q1brkb1r/p1pppppp/np3B2/8/6n1/1P5N/P1PPPPPP/QN1RKB1R w HDhd - 0 9
 perft 1 32
 perft 2 984
@@ -1782,7 +1783,7 @@ perft 4 1007217
 perft 5 32597704
 perft 6 1075429389
 
-id 1
+id 198
 epd qn1rk1rb/p1pppppp/1p2n3/8/2b5/4NPP1/PPPPP1RP/QNBRK2B w Dgd - 4 9
 perft 1 22
 perft 2 802
@@ -1791,7 +1792,7 @@ perft 4 697722
 perft 5 17761431
 perft 6 650603534
 
-id 1
+id 199
 epd qbnrbknr/ppp2p1p/8/3pp1p1/1PP1B3/5N2/P2PPPPP/Q1NRBK1R w HDhd - 0 9
 perft 1 34
 perft 2 943
@@ -1800,7 +1801,7 @@ perft 4 930619
 perft 5 32523099
 perft 6 955802240
 
-id 1
+id 200
 epd qnrbb1nr/pp1p1ppp/2p2k2/4p3/4P3/5PPP/PPPP4/QNRBBKNR w HC - 0 9
 perft 1 20
 perft 2 460
@@ -1809,7 +1810,7 @@ perft 4 241640
 perft 5 5846781
 perft 6 140714047
 
-id 1
+id 201
 epd qnr1bbnr/ppk1p1pp/3p4/2p2p2/8/2P5/PP1PPPPP/QNKRBBNR w - - 1 9
 perft 1 19
 perft 2 572
@@ -1818,7 +1819,7 @@ perft 4 357340
 perft 5 7994547
 perft 6 243724815
 
-id 1
+id 202
 epd qnrkbnrb/1p1p1ppp/2p5/4p3/p7/N1BP4/PPP1PPPP/Q1R1KNRB w gc - 0 9
 perft 1 27
 perft 2 579
@@ -1827,7 +1828,7 @@ perft 4 375168
 perft 5 10845146
 perft 6 268229097
 
-id 1
+id 203
 epd qbnrkn1r/1pppp1p1/p3bp2/2BN3p/8/5P2/PPPPP1PP/QBNRK2R w HDhd - 0 9
 perft 1 40
 perft 2 1027
@@ -1836,7 +1837,7 @@ perft 4 1059229
 perft 5 38511307
 perft 6 1104094381
 
-id 1
+id 204
 epd qnrbknbr/1pp2ppp/4p3/p6N/2p5/8/PPPPPPPP/Q1RBK1BR w HChc - 0 9
 perft 1 22
 perft 2 510
@@ -1845,7 +1846,7 @@ perft 4 300180
 perft 5 7403327
 perft 6 200581103
 
-id 1
+id 205
 epd 1qkrnbbr/p1pppppp/2n5/1p6/8/5NP1/PPPPPP1P/QNRK1BBR w HC - 4 9
 perft 1 24
 perft 2 549
@@ -1854,7 +1855,7 @@ perft 4 352037
 perft 5 9396521
 perft 6 255676649
 
-id 1
+id 206
 epd q1rknr1b/1ppppppb/2n5/p2B3p/8/1PN3P1/P1PPPP1P/Q1RKNRB1 w FCfc - 3 9
 perft 1 31
 perft 2 924
@@ -1863,7 +1864,7 @@ perft 4 861944
 perft 5 27463479
 perft 6 847726572
 
-id 1
+id 207
 epd bbnqrk1r/pp1pppp1/2p4p/8/6n1/1N1P1P2/PPP1P1PP/BBQ1RKNR w HEhe - 4 9
 perft 1 24
 perft 2 804
@@ -1872,7 +1873,7 @@ perft 4 666341
 perft 5 18024195
 perft 6 595947631
 
-id 1
+id 208
 epd bn1brknr/ppp1p1pp/5p2/3p4/6qQ/3P3P/PPP1PPP1/BN1BRKNR w HEhe - 4 9
 perft 1 25
 perft 2 854
@@ -1881,7 +1882,7 @@ perft 4 704173
 perft 5 20290974
 perft 6 600195008
 
-id 1
+id 209
 epd 1nqrkbnr/2pp1ppp/pp2p3/3b4/2P5/N7/PP1PPPPP/B1QRKBNR w HDhd - 0 9
 perft 1 22
 perft 2 651
@@ -1890,7 +1891,7 @@ perft 4 479152
 perft 5 13133439
 perft 6 390886040
 
-id 1
+id 210
 epd bnqrk1rb/1pp1pppp/p2p4/4n3/2PPP3/8/PP3PPP/BNQRKNRB w GDgd - 1 9
 perft 1 30
 perft 2 950
@@ -1899,7 +1900,7 @@ perft 4 889687
 perft 5 27610213
 perft 6 880739164
 
-id 1
+id 211
 epd nbb1rknr/1ppq1ppp/3p4/p3p3/4P3/1N2R3/PPPP1PPP/1BBQ1KNR w Hhe - 2 9
 perft 1 33
 perft 2 988
@@ -1908,7 +1909,7 @@ perft 4 967575
 perft 5 30894863
 perft 6 985384035
 
-id 1
+id 212
 epd nqbbrknr/2ppp2p/pp4p1/5p2/7P/3P1P2/PPPBP1P1/NQ1BRKNR w HEhe - 0 9
 perft 1 27
 perft 2 492
@@ -1917,7 +1918,7 @@ perft 4 276569
 perft 5 7583292
 perft 6 175376176
 
-id 1
+id 213
 epd 1qbrkb1r/pppppppp/8/3n4/4P1n1/PN6/1PPP1P1P/1QBRKBNR w HDhd - 3 9
 perft 1 28
 perft 2 800
@@ -1926,7 +1927,7 @@ perft 4 630374
 perft 5 17313279
 perft 6 507140861
 
-id 1
+id 214
 epd 1qbrknrb/1p1ppppp/1np5/8/p4P1P/4P1N1/PPPP2P1/NQBRK1RB w GDgd - 0 9
 perft 1 21
 perft 2 482
@@ -1935,7 +1936,7 @@ perft 4 267935
 perft 5 6218644
 perft 6 168704845
 
-id 1
+id 215
 epd nbqrbkr1/ppp1pppp/8/3p4/6n1/2P2PPN/PP1PP2P/NBQRBK1R w HDd - 1 9
 perft 1 29
 perft 2 921
@@ -1944,7 +1945,7 @@ perft 4 840262
 perft 5 24138518
 perft 6 806554650
 
-id 1
+id 216
 epd nqrb1knr/1ppbpp1p/p7/3p2p1/2P3P1/5P1P/PP1PP3/NQRBBKNR w HChc - 1 9
 perft 1 31
 perft 2 803
@@ -1953,7 +1954,7 @@ perft 4 665799
 perft 5 21998733
 perft 6 583349773
 
-id 1
+id 217
 epd 1qrkbbr1/pppp1ppp/1n3n2/4p3/5P2/1N6/PPPPP1PP/1QRKBBNR w HCc - 0 9
 perft 1 25
 perft 2 715
@@ -1962,7 +1963,7 @@ perft 4 556325
 perft 5 15514933
 perft 6 459533767
 
-id 1
+id 218
 epd nqrkb1rb/pp2pppp/2p1n3/3p4/3PP1N1/8/PPP2PPP/NQRKB1RB w GCgc - 0 9
 perft 1 26
 perft 2 795
@@ -1971,7 +1972,7 @@ perft 4 679387
 perft 5 19185851
 perft 6 616508881
 
-id 1
+id 219
 epd nb1rknbr/pp2ppp1/8/2Bp3p/6P1/2P2P1q/PP1PP2P/NBQRKN1R w HDhd - 0 9
 perft 1 35
 perft 2 1391
@@ -1980,7 +1981,7 @@ perft 4 1726888
 perft 5 53033675
 perft 6 2139267832
 
-id 1
+id 220
 epd nqrbkn1r/pp1pp1pp/8/2p2p2/5P2/P3B2P/1PbPP1P1/NQRBKN1R w HChc - 0 9
 perft 1 23
 perft 2 758
@@ -1989,7 +1990,7 @@ perft 4 653854
 perft 5 18296195
 perft 6 628403401
 
-id 1
+id 221
 epd nqrknbbr/pp1pppp1/7p/2p5/7P/1P1N4/P1PPPPPB/NQRK1B1R w HChc - 2 9
 perft 1 29
 perft 2 824
@@ -1998,7 +1999,7 @@ perft 4 683686
 perft 5 19429491
 perft 6 595493802
 
-id 1
+id 222
 epd 1qrknrbb/B1p1pppp/8/1p1p4/2n2P2/1P6/P1PPP1PP/NQRKNR1B w FCfc - 0 9
 perft 1 28
 perft 2 771
@@ -2007,7 +2008,7 @@ perft 4 581721
 perft 5 16065378
 perft 6 483037840
 
-id 1
+id 223
 epd bbnrqk1r/1ppppppp/8/7n/1p6/P6P/1BPPPPP1/1BNRQKNR w HDhd - 0 9
 perft 1 25
 perft 2 601
@@ -2016,7 +2017,7 @@ perft 4 396661
 perft 5 10697065
 perft 6 289472497
 
-id 1
+id 224
 epd bnrbqknr/ppp3p1/3ppp1Q/7p/3P4/1P6/P1P1PPPP/BNRB1KNR w HChc - 0 9
 perft 1 32
 perft 2 845
@@ -2025,7 +2026,7 @@ perft 4 742888
 perft 5 23717883
 perft 6 682154649
 
-id 1
+id 225
 epd bn1qkb1r/pprppppp/8/2p5/2PPP1n1/8/PPR2PPP/BN1QKBNR w Hh - 1 9
 perft 1 32
 perft 2 856
@@ -2034,7 +2035,7 @@ perft 4 768595
 perft 5 25245957
 perft 6 727424329
 
-id 1
+id 226
 epd 1nrqknrb/p1pp1ppp/1p2p3/3N4/5P1P/5b2/PPPPP3/B1RQKNRB w GCgc - 2 9
 perft 1 33
 perft 2 873
@@ -2043,7 +2044,7 @@ perft 4 779473
 perft 5 25128076
 perft 6 745401024
 
-id 1
+id 227
 epd nbbrqrk1/pppppppp/8/2N1n3/P7/6P1/1PPPPP1P/1BBRQKNR w HD - 3 9
 perft 1 25
 perft 2 555
@@ -2052,7 +2053,7 @@ perft 4 342296
 perft 5 9153089
 perft 6 234841945
 
-id 1
+id 228
 epd 1rbbqknr/1ppp1pp1/1n2p3/p6p/4P1P1/P6N/1PPP1P1P/NRBBQK1R w HBhb - 0 9
 perft 1 25
 perft 2 693
@@ -2061,7 +2062,7 @@ perft 4 528070
 perft 5 15133381
 perft 6 439344945
 
-id 1
+id 229
 epd nrq1kbnr/p1pbpppp/3p4/1p6/6P1/1N3N2/PPPPPP1P/1RBQKB1R w HBhb - 4 9
 perft 1 24
 perft 2 648
@@ -2070,7 +2071,7 @@ perft 4 471192
 perft 5 12871967
 perft 6 380436777
 
-id 1
+id 230
 epd nr1qknr1/p1pppp1p/b5p1/1p6/8/P4PP1/1bPPP1RP/NRBQKN1B w Bgb - 0 9
 perft 1 18
 perft 2 533
@@ -2079,7 +2080,7 @@ perft 4 331243
 perft 5 7777833
 perft 6 234905172
 
-id 1
+id 231
 epd nbrqbknr/1ppp2pp/8/4pp2/p2PP1P1/7N/PPP2P1P/NBRQBK1R w HChc - 0 9
 perft 1 29
 perft 2 803
@@ -2088,7 +2089,7 @@ perft 4 706648
 perft 5 22305910
 perft 6 672322762
 
-id 1
+id 232
 epd nr1b1k1r/ppp1pppp/2bp1n2/6P1/2P3q1/5P2/PP1PP2P/NRQBBKNR w HBhb - 1 9
 perft 1 27
 perft 2 1199
@@ -2097,7 +2098,7 @@ perft 4 1296241
 perft 5 35121759
 perft 6 1418677099
 
-id 1
+id 233
 epd nrqkbbnr/2pppp1p/p7/1p6/2P1Pp2/8/PPNP2PP/1RQKBBNR w HBhb - 0 9
 perft 1 28
 perft 2 613
@@ -2106,7 +2107,7 @@ perft 4 432750
 perft 5 13097064
 perft 6 345294379
 
-id 1
+id 234
 epd 1rqkbnrb/pp1ppp1p/1n4p1/B1p5/3PP3/4N3/PPP2PPP/NRQK2RB w GBgb - 0 9
 perft 1 33
 perft 2 723
@@ -2115,7 +2116,7 @@ perft 4 590970
 perft 5 19715083
 perft 6 535650233
 
-id 1
+id 235
 epd nbrqkn1r/1pppp2p/5pp1/p2b4/5P2/P2PN3/1PP1P1PP/NBRQK1BR w HChc - 2 9
 perft 1 23
 perft 2 607
@@ -2124,7 +2125,7 @@ perft 4 400970
 perft 5 11026383
 perft 6 290708878
 
-id 1
+id 236
 epd nrqbknbr/pp1pppp1/8/2p4p/P3PP2/8/1PPP2PP/NRQBKNBR w HBhb - 1 9
 perft 1 26
 perft 2 700
@@ -2133,7 +2134,7 @@ perft 4 556026
 perft 5 16058815
 perft 6 485460242
 
-id 1
+id 237
 epd nrqknbbr/p2pppp1/1pp5/6Qp/3P4/1P3P2/P1P1P1PP/NR1KNBBR w HBhb - 0 9
 perft 1 40
 perft 2 905
@@ -2142,7 +2143,7 @@ perft 4 829746
 perft 5 29263502
 perft 6 791963709
 
-id 1
+id 238
 epd nrqknrbb/1p3ppp/p2p4/2p1p3/1P6/3PP1P1/P1P2P1P/NRQKNRBB w FBfb - 0 9
 perft 1 29
 perft 2 780
@@ -2151,7 +2152,7 @@ perft 4 654495
 perft 5 19532077
 perft 6 593181101
 
-id 1
+id 239
 epd 1bnrkqnr/p1pppp2/7p/1p4p1/4b3/7N/PPPP1PPP/BBNRKQ1R w HDhd - 0 9
 perft 1 25
 perft 2 725
@@ -2160,7 +2161,7 @@ perft 4 565006
 perft 5 16661676
 perft 6 487354613
 
-id 1
+id 240
 epd bnrbkq1r/pp2p1pp/5n2/2pp1p2/P7/N1PP4/1P2PPPP/B1RBKQNR w HChc - 1 9
 perft 1 24
 perft 2 745
@@ -2169,7 +2170,7 @@ perft 4 584015
 perft 5 15079602
 perft 6 488924040
 
-id 1
+id 241
 epd 2rkqbnr/p1pppppp/2b5/1pn5/1P3P1Q/2B5/P1PPP1PP/1NRK1BNR w HChc - 3 9
 perft 1 33
 perft 2 904
@@ -2178,7 +2179,7 @@ perft 4 840025
 perft 5 28194726
 perft 6 801757709
 
-id 1
+id 242
 epd bnrkqnrb/2pppp2/8/pp4pp/1P5P/6P1/P1PPPPB1/BNRKQNR1 w GCgc - 0 9
 perft 1 34
 perft 2 1059
@@ -2187,7 +2188,7 @@ perft 4 1054311
 perft 5 33195397
 perft 6 1036498304
 
-id 1
+id 243
 epd 1bbrkq1r/pppp2pp/1n2pp1n/8/2PP4/1N4P1/PP2PP1P/1BBRKQNR w HDhd - 1 9
 perft 1 33
 perft 2 891
@@ -2196,7 +2197,7 @@ perft 4 814247
 perft 5 26970098
 perft 6 788040469
 
-id 1
+id 244
 epd nrbbkqnr/1p2pp1p/p1p3p1/3p4/8/1PP5/P2PPPPP/NRBBKQNR w HBhb - 0 9
 perft 1 21
 perft 2 567
@@ -2205,7 +2206,7 @@ perft 4 376487
 perft 5 9539687
 perft 6 284426039
 
-id 1
+id 245
 epd 1rbkqbr1/ppp1pppp/1n5n/3p4/3P4/1PP3P1/P3PP1P/NRBKQBNR w HBb - 1 9
 perft 1 27
 perft 2 752
@@ -2214,7 +2215,7 @@ perft 4 606783
 perft 5 16986290
 perft 6 521817800
 
-id 1
+id 246
 epd nrbkq1rb/1ppp1pp1/4p1n1/p6p/2PP4/5P2/PPK1P1PP/NRB1QNRB w gb - 0 9
 perft 1 35
 perft 2 697
@@ -2223,7 +2224,7 @@ perft 4 505836
 perft 5 16906409
 perft 6 390324794
 
-id 1
+id 247
 epd nbrkbqnr/p2pp1p1/5p2/1pp4p/7P/3P2P1/PPP1PP2/NBKRBQNR w hc - 0 9
 perft 1 25
 perft 2 679
@@ -2232,7 +2233,7 @@ perft 4 484921
 perft 5 12879258
 perft 6 376652259
 
-id 1
+id 248
 epd nrkb1qnr/ppppp1p1/6bp/5p2/1PP1P1P1/8/P2P1P1P/NRKBBQNR w HBhb - 1 9
 perft 1 32
 perft 2 761
@@ -2241,7 +2242,7 @@ perft 4 632916
 perft 5 20671433
 perft 6 568524724
 
-id 1
+id 249
 epd nrk1bbnr/p1q1pppp/1ppp4/8/3P3P/4K3/PPP1PPP1/NR1QBBNR w hb - 0 9
 perft 1 30
 perft 2 719
@@ -2250,7 +2251,7 @@ perft 4 541389
 perft 5 16278120
 perft 6 423649784
 
-id 1
+id 250
 epd nrkqbr1b/1pppp1pp/5pn1/p6N/1P3P2/8/P1PPP1PP/NRKQB1RB w GBb - 0 9
 perft 1 26
 perft 2 494
@@ -2259,7 +2260,7 @@ perft 4 296170
 perft 5 8763742
 perft 6 206993496
 
-id 1
+id 251
 epd nbrkq2r/pppp1bpp/4p1n1/5p2/7P/2P3N1/PP1PPPP1/NBKRQ1BR w hc - 0 9
 perft 1 27
 perft 2 701
@@ -2268,7 +2269,7 @@ perft 4 535052
 perft 5 15394667
 perft 6 443506342
 
-id 1
+id 252
 epd nrkbqnbr/2ppp2p/pp6/5pp1/P1P5/8/1P1PPPPP/NRKBQNBR w HBhb - 0 9
 perft 1 21
 perft 2 487
@@ -2277,7 +2278,7 @@ perft 4 285387
 perft 5 7218486
 perft 6 193586674
 
-id 1
+id 253
 epd nr1qnbbr/pk1pppp1/1pp4p/8/3P4/5P1P/PPP1P1P1/NRKQNBBR w HB - 0 9
 perft 1 22
 perft 2 546
@@ -2286,7 +2287,7 @@ perft 4 352855
 perft 5 9587439
 perft 6 259830255
 
-id 1
+id 254
 epd nrkq1rbb/pp1ppp1p/2pn4/8/PP3Pp1/7P/2PPP1P1/NRKQNRBB w FBfb - 0 9
 perft 1 26
 perft 2 839
@@ -2295,7 +2296,7 @@ perft 4 723845
 perft 5 19867117
 perft 6 658535326
 
-id 1
+id 255
 epd b2rknqr/pp1ppppp/8/2P5/n7/P7/1PPNPPPb/BBNRK1QR w HDhd - 2 9
 perft 1 24
 perft 2 699
@@ -2304,7 +2305,7 @@ perft 4 575172
 perft 5 17734818
 perft 6 535094237
 
-id 1
+id 256
 epd bnrbknqr/pp2p2p/2p3p1/3p1p2/8/3P4/PPPNPPPP/B1RBKNQR w HChc - 0 9
 perft 1 23
 perft 2 580
@@ -2313,7 +2314,7 @@ perft 4 385917
 perft 5 10133092
 perft 6 288041554
 
-id 1
+id 257
 epd bnrknb1r/pppp2pp/8/4pp2/6P1/3P3P/qPP1PPQ1/BNRKNB1R w HChc - 0 9
 perft 1 28
 perft 2 1100
@@ -2322,7 +2323,7 @@ perft 4 1217514
 perft 5 36142423
 perft 6 1361341249
 
-id 1
+id 258
 epd b1rknqrb/ppp1p1p1/2np1p1p/8/4N3/6PQ/PPPPPP1P/B1RKN1RB w GCgc - 0 9
 perft 1 36
 perft 2 629
@@ -2331,7 +2332,7 @@ perft 4 453064
 perft 5 16897544
 perft 6 367503974
 
-id 1
+id 259
 epd nb1rknqr/pbppp2p/6p1/1p3p2/5P2/3KP3/PPPP2PP/NBBR1NQR w hd - 2 9
 perft 1 18
 perft 2 557
@@ -2340,7 +2341,7 @@ perft 4 300744
 perft 5 5822387
 perft 6 180936551
 
-id 1
+id 260
 epd nr1bknqr/1ppb1ppp/p7/3pp3/B7/2P3NP/PP1PPPP1/NRB1K1QR w HBhb - 2 9
 perft 1 28
 perft 2 688
@@ -2349,7 +2350,7 @@ perft 4 519785
 perft 5 15153092
 perft 6 425149249
 
-id 1
+id 261
 epd nrbkn2r/pppp1pqp/4p1p1/8/3P2P1/P3B3/P1P1PP1P/NR1KNBQR w HBhb - 1 9
 perft 1 32
 perft 2 808
@@ -2358,7 +2359,7 @@ perft 4 676525
 perft 5 22094260
 perft 6 609377239
 
-id 1
+id 262
 epd nrbknqrb/2p1ppp1/1p6/p2p2Bp/1P6/3P1P2/P1P1P1PP/NR1KNQRB w GBgb - 0 9
 perft 1 30
 perft 2 625
@@ -2367,7 +2368,7 @@ perft 4 418895
 perft 5 12225742
 perft 6 301834282
 
-id 1
+id 263
 epd nbr1knqr/1pp1p1pp/3p1pb1/8/7P/5P2/PPPPPQP1/NBRKBN1R w HC - 2 9
 perft 1 29
 perft 2 863
@@ -2376,7 +2377,7 @@ perft 4 800239
 perft 5 24965592
 perft 6 799182442
 
-id 1
+id 264
 epd n1kbbnqr/prp2ppp/1p1p4/4p3/1P2P3/3P1B2/P1P2PPP/NRK1BNQR w HBh - 2 9
 perft 1 26
 perft 2 653
@@ -2385,7 +2386,7 @@ perft 4 449719
 perft 5 12187583
 perft 6 336872952
 
-id 1
+id 265
 epd nrknbbqr/pp3p1p/B3p1p1/2pp4/4P3/2N3P1/PPPP1P1P/NRK1B1QR w HBhb - 0 9
 perft 1 29
 perft 2 683
@@ -2394,7 +2395,7 @@ perft 4 501807
 perft 5 14684565
 perft 6 394951291
 
-id 1
+id 266
 epd n1knbqrb/pr1p1ppp/Qp6/2p1p3/4P3/6P1/PPPP1P1P/NRKNB1RB w GBg - 2 9
 perft 1 31
 perft 2 552
@@ -2403,7 +2404,7 @@ perft 4 371343
 perft 5 11663330
 perft 6 283583340
 
-id 1
+id 267
 epd nbrknqbr/p3p1pp/1p1p1p2/2p5/2Q1PP2/8/PPPP2PP/NBRKN1BR w HChc - 0 9
 perft 1 37
 perft 2 913
@@ -2412,7 +2413,7 @@ perft 4 825748
 perft 5 28899548
 perft 6 759875563
 
-id 1
+id 268
 epd nrkb1qbr/pp1pppp1/5n2/7p/2p5/1N1NPP2/PPPP2PP/1RKB1QBR w HBhb - 0 9
 perft 1 25
 perft 2 712
@@ -2421,7 +2422,7 @@ perft 4 543870
 perft 5 15045589
 perft 6 445074372
 
-id 1
+id 269
 epd nrk2bbr/pppqpppp/3p4/8/1P3nP1/3P4/P1P1PP1P/NRKNQBBR w HBhb - 1 9
 perft 1 24
 perft 2 814
@@ -2430,7 +2431,7 @@ perft 4 670162
 perft 5 17603960
 perft 6 592121050
 
-id 1
+id 270
 epd nrknqrbb/1p2ppp1/2pp4/Q6p/P2P3P/8/1PP1PPP1/NRKN1RBB w FBfb - 0 9
 perft 1 34
 perft 2 513
@@ -2439,7 +2440,7 @@ perft 4 303908
 perft 5 9569590
 perft 6 206509331
 
-id 1
+id 271
 epd bbnrk1rq/pp2p1pp/2ppn3/5p2/8/3NNP1P/PPPPP1P1/BB1RK1RQ w GDgd - 1 9
 perft 1 28
 perft 2 697
@@ -2448,7 +2449,7 @@ perft 4 517917
 perft 5 15301879
 perft 6 410843713
 
-id 1
+id 272
 epd bnrbknrq/ppppp2p/6p1/5p2/4QPP1/8/PPPPP2P/BNRBKNR1 w GCgc - 0 9
 perft 1 37
 perft 2 901
@@ -2457,7 +2458,7 @@ perft 4 877372
 perft 5 31385912
 perft 6 903831981
 
-id 1
+id 273
 epd bnkrnbrq/ppppp1p1/B6p/5p2/8/4P3/PPPP1PPP/BNKRN1RQ w - - 0 9
 perft 1 26
 perft 2 417
@@ -2466,7 +2467,7 @@ perft 4 217095
 perft 5 5980981
 perft 6 133080499
 
-id 1
+id 274
 epd bnrk1rqb/2pppp1p/3n4/pp4p1/3Q1P2/2N3P1/PPPPP2P/B1RKNR1B w FCfc - 0 9
 perft 1 49
 perft 2 1655
@@ -2475,7 +2476,7 @@ perft 4 2512003
 perft 5 107234294
 perft 6 3651608327
 
-id 1
+id 275
 epd nbbrk1rq/pp2pppp/2pp4/8/2P2n2/6N1/PP1PP1PP/NBBRKR1Q w Dgd - 0 9
 perft 1 28
 perft 2 960
@@ -2484,7 +2485,7 @@ perft 4 884237
 perft 5 26083252
 perft 6 846682836
 
-id 1
+id 276
 epd nrbb2rq/pppk1ppp/4p1n1/3p4/6P1/1BP5/PP1PPPQP/NRB1KNR1 w GB - 0 9
 perft 1 28
 perft 2 735
@@ -2493,7 +2494,7 @@ perft 4 593839
 perft 5 18588316
 perft 6 512048946
 
-id 1
+id 277
 epd nrbk1brq/p1ppppp1/7p/1p6/4P1nP/P7/1PPP1PP1/NRBKNBRQ w GBgb - 0 9
 perft 1 22
 perft 2 572
@@ -2502,7 +2503,7 @@ perft 4 351494
 perft 5 8525056
 perft 6 247615348
 
-id 1
+id 278
 epd nrbk1rqb/1pp2ppp/5n2/p2pp3/5B2/1N1P2P1/PPP1PP1P/1R1KNRQB w FBfb - 0 9
 perft 1 35
 perft 2 927
@@ -2511,7 +2512,7 @@ perft 4 849932
 perft 5 28465693
 perft 6 783048748
 
-id 1
+id 279
 epd nbrkb1rq/p1pp1ppp/4n3/4p3/Pp6/6N1/1PPPPPPP/NBRKBRQ1 w Cgc - 0 9
 perft 1 20
 perft 2 456
@@ -2520,7 +2521,7 @@ perft 4 247733
 perft 5 6124625
 perft 6 154766108
 
-id 1
+id 280
 epd nrkb1nrq/p2pp1pp/1pp2p2/7b/6PP/5P2/PPPPP2N/NRKBB1RQ w GBgb - 0 9
 perft 1 21
 perft 2 479
@@ -2529,7 +2530,7 @@ perft 4 264493
 perft 5 6696458
 perft 6 165253524
 
-id 1
+id 281
 epd nr1nbbr1/pppkpp1p/6p1/3p4/P6P/1P6/1RPPPPP1/N1KNBBRQ w G - 1 9
 perft 1 20
 perft 2 498
@@ -2538,7 +2539,7 @@ perft 4 288813
 perft 5 7197322
 perft 6 188021682
 
-id 1
+id 282
 epd nrknbrqb/3p1ppp/ppN1p3/8/6P1/8/PPPPPP1P/1RKNBRQB w FBfb - 0 9
 perft 1 32
 perft 2 526
@@ -2547,7 +2548,7 @@ perft 4 319836
 perft 5 10755190
 perft 6 220058991
 
-id 1
+id 283
 epd nbrkn1bq/p1pppr1p/1p6/5pp1/8/1N2PP2/PPPP2PP/1BKRNRBQ w c - 1 9
 perft 1 19
 perft 2 491
@@ -2556,7 +2557,7 @@ perft 4 277313
 perft 5 6230616
 perft 6 180748649
 
-id 1
+id 284
 epd nrkbnrbq/ppppppp1/8/8/7p/PP3P2/2PPPRPP/NRKBN1BQ w Bfb - 0 9
 perft 1 16
 perft 2 353
@@ -2565,7 +2566,7 @@ perft 4 156002
 perft 5 3008668
 perft 6 82706705
 
-id 1
+id 285
 epd nrknrbbq/p4ppp/2p1p3/1p1p4/1P2P3/2P5/P1NP1PPP/1RKNRBBQ w EBeb - 0 9
 perft 1 29
 perft 2 728
@@ -2574,7 +2575,7 @@ perft 4 587668
 perft 5 18231199
 perft 6 511686397
 
-id 1
+id 286
 epd nrknr1bb/pppp1p2/7p/2qPp1p1/8/1P5P/P1P1PPP1/NRKNRQBB w EBeb - 0 9
 perft 1 20
 perft 2 714
@@ -2583,7 +2584,7 @@ perft 4 500458
 perft 5 11132758
 perft 6 386064577
 
-id 1
+id 287
 epd bbqnrrkn/ppp2p1p/3pp1p1/8/1PP5/2Q5/P1BPPPPP/B2NRKRN w GE - 0 9
 perft 1 39
 perft 2 593
@@ -2592,7 +2593,7 @@ perft 4 424799
 perft 5 16764576
 perft 6 346185058
 
-id 1
+id 288
 epd bqn1rkrn/p1p2ppp/1p1p4/4p3/3PP2b/8/PPP2PPP/BQNBRKRN w GEge - 2 9
 perft 1 25
 perft 2 773
@@ -2601,7 +2602,7 @@ perft 4 616817
 perft 5 16632403
 perft 6 515838333
 
-id 1
+id 289
 epd bqnrkb1n/p1p1pprp/3p4/1p2P1p1/2PP4/8/PP3PPP/BQNRKBRN w GDd - 1 9
 perft 1 31
 perft 2 860
@@ -2610,7 +2611,7 @@ perft 4 810379
 perft 5 27233018
 perft 6 813751250
 
-id 1
+id 290
 epd bqr1krnb/ppppppp1/7p/3n4/1P4P1/P4N2/2PPPP1P/BQNRKR1B w FDf - 3 9
 perft 1 31
 perft 2 709
@@ -2619,7 +2620,7 @@ perft 4 559830
 perft 5 18608857
 perft 6 480498340
 
-id 1
+id 291
 epd qbbn1krn/pp3ppp/4r3/2ppp3/P1P4P/8/1P1PPPP1/QBBNRKRN w GEg - 1 9
 perft 1 26
 perft 2 775
@@ -2628,7 +2629,7 @@ perft 4 649673
 perft 5 18476807
 perft 6 582542257
 
-id 1
+id 292
 epd qnbbrkrn/1p1pp2p/p7/2p2pp1/8/4P2P/PPPP1PPK/QNBBRR1N w ge - 0 9
 perft 1 25
 perft 2 599
@@ -2637,7 +2638,7 @@ perft 4 389104
 perft 5 10260500
 perft 6 279222412
 
-id 1
+id 293
 epd qnbrkbrn/1ppp2p1/p3p2p/5p2/P4P2/1P6/2PPP1PP/QNBRKBRN w GDgd - 0 9
 perft 1 27
 perft 2 588
@@ -2646,7 +2647,7 @@ perft 4 394829
 perft 5 11640416
 perft 6 293541380
 
-id 1
+id 294
 epd 1nbrkrnb/p1pppp1p/1pq3p1/8/4P3/P1P4N/1P1P1PPP/QNBRKR1B w FDfd - 1 9
 perft 1 18
 perft 2 609
@@ -2655,7 +2656,7 @@ perft 4 406831
 perft 5 8604788
 perft 6 299491047
 
-id 1
+id 295
 epd qb1r1krn/pppp2pp/1n2ppb1/4P3/7P/8/PPPP1PP1/QBNRBKRN w GDgd - 0 9
 perft 1 20
 perft 2 578
@@ -2664,7 +2665,7 @@ perft 4 349453
 perft 5 7939483
 perft 6 229142178
 
-id 1
+id 296
 epd qnr1bkrn/p3pppp/1bpp4/1p6/2P2PP1/8/PP1PPN1P/QNRBBKR1 w GCgc - 0 9
 perft 1 30
 perft 2 865
@@ -2673,7 +2674,7 @@ perft 4 771705
 perft 5 24475596
 perft 6 719842237
 
-id 1
+id 297
 epd 1nkrbbrn/qppppppp/8/8/p2P4/1P5P/P1P1PPP1/QNKRBBRN w - - 0 9
 perft 1 27
 perft 2 672
@@ -2682,7 +2683,7 @@ perft 4 505278
 perft 5 14065717
 perft 6 410130412
 
-id 1
+id 298
 epd 1qrkbrnb/ppp1p1pp/n2p4/5p2/4N3/8/PPPPPPPP/Q1RKBRNB w Ffc - 2 9
 perft 1 25
 perft 2 718
@@ -2691,7 +2692,7 @@ perft 4 536771
 perft 5 14404324
 perft 6 424279467
 
-id 1
+id 299
 epd q1nrkrbn/pp1pppp1/2p4p/8/P7/5Pb1/BPPPPNPP/Q1NRKRB1 w FDfd - 0 9
 perft 1 22
 perft 2 558
@@ -2700,7 +2701,7 @@ perft 4 336042
 perft 5 8516966
 perft 6 228074630
 
-id 1
+id 300
 epd qnrbkrbn/1p1p1pp1/p1p5/4p2p/8/3P1P2/PPP1P1PP/QNRBKRBN w FCfc - 0 9
 perft 1 28
 perft 2 669
@@ -2709,7 +2710,7 @@ perft 4 440930
 perft 5 12055174
 perft 6 313276304
 
-id 1
+id 301
 epd qnrkr1bn/p1pp1ppp/8/1p2p3/3P1P2/bP4P1/P1P1P2P/QNRKRBBN w ECec - 1 9
 perft 1 23
 perft 2 845
@@ -2718,7 +2719,7 @@ perft 4 759778
 perft 5 19939053
 perft 6 718075943
 
-id 1
+id 302
 epd q1krrnbb/p1p1pppp/2np4/1pB5/5P2/8/PPPPP1PP/QNRKRN1B w EC - 0 9
 perft 1 29
 perft 2 776
@@ -2727,7 +2728,7 @@ perft 4 631941
 perft 5 18110831
 perft 6 549019739
 
-id 1
+id 303
 epd bbn1rkrn/pp1p1ppp/8/2p1p1q1/6P1/P7/BPPPPP1P/B1NQRKRN w GEge - 0 9
 perft 1 26
 perft 2 936
@@ -2736,7 +2737,7 @@ perft 4 906801
 perft 5 24984621
 perft 6 901444251
 
-id 1
+id 304
 epd bn1brkrn/pp1qpp1p/2p3p1/3p4/1PPP4/P7/4PPPP/BNQBRKRN w GEge - 1 9
 perft 1 29
 perft 2 755
@@ -2745,7 +2746,7 @@ perft 4 645963
 perft 5 20128587
 perft 6 600207069
 
-id 1
+id 305
 epd b2rkbrn/p1pppppp/qp6/8/1n6/2B2P2/P1PPP1PP/1NQRKBRN w GDgd - 0 9
 perft 1 24
 perft 2 878
@@ -2754,7 +2755,7 @@ perft 4 791007
 perft 5 20840078
 perft 6 775795187
 
-id 1
+id 306
 epd b2rkrnb/pqp1pppp/n7/1p1p4/P7/N1P2N2/1P1PPPPP/B1QRKR1B w FDfd - 4 9
 perft 1 26
 perft 2 724
@@ -2763,7 +2764,7 @@ perft 4 571891
 perft 5 16109522
 perft 6 492933398
 
-id 1
+id 307
 epd 1bbqrkrn/ppppp1p1/8/5p1p/P1n3P1/3P4/1PP1PP1P/NBBQRRKN w ge - 1 9
 perft 1 25
 perft 2 678
@@ -2772,7 +2773,7 @@ perft 4 461211
 perft 5 12173245
 perft 6 329661421
 
-id 1
+id 308
 epd nqb1rrkn/ppp1bppp/3pp3/8/3P4/1P6/PQP1PPPP/N1BBRRKN w - - 1 9
 perft 1 23
 perft 2 503
@@ -2781,7 +2782,7 @@ perft 4 290341
 perft 5 7626054
 perft 6 188215608
 
-id 1
+id 309
 epd nqbrkbr1/p1pppppp/1p6/2N2n2/2P5/5P2/PP1PP1PP/1QBRKBRN w GDgd - 1 9
 perft 1 29
 perft 2 688
@@ -2790,7 +2791,7 @@ perft 4 506302
 perft 5 15167248
 perft 6 399015237
 
-id 1
+id 310
 epd nqbrkrn1/1ppppp2/6pp/p7/1P6/2Q5/P1PPPPPP/N1BRKRNB w FDfd - 0 9
 perft 1 36
 perft 2 602
@@ -2799,7 +2800,7 @@ perft 4 397340
 perft 5 13706856
 perft 6 291708797
 
-id 1
+id 311
 epd nbqrbrkn/pp1p1pp1/2p5/4p2p/2P3P1/1P3P2/P2PP2P/NBQRBKRN w GD - 0 9
 perft 1 34
 perft 2 655
@@ -2808,7 +2809,7 @@ perft 4 474396
 perft 5 16613630
 perft 6 379344541
 
-id 1
+id 312
 epd nqrbbrkn/1p1pppp1/8/p1p4p/4P2P/1N4P1/PPPP1P2/1QRBBKRN w GC - 0 9
 perft 1 23
 perft 2 597
@@ -2817,7 +2818,7 @@ perft 4 400357
 perft 5 10096863
 perft 6 294900903
 
-id 1
+id 313
 epd nqrkbbrn/2p1p1pp/pp1p1p2/8/P2N4/2P5/1P1PPPPP/1QRKBBRN w GCgc - 0 9
 perft 1 32
 perft 2 744
@@ -2826,7 +2827,7 @@ perft 4 550728
 perft 5 17597164
 perft 6 428786656
 
-id 1
+id 314
 epd n1krbrnb/q1pppppp/p7/1p6/3Q4/2P2P2/PP1PP1PP/N1RKBRNB w FC - 1 9
 perft 1 43
 perft 2 1038
@@ -2835,7 +2836,7 @@ perft 4 1074450
 perft 5 40918952
 perft 6 1126603824
 
-id 1
+id 315
 epd nb1rkrbn/p1pp1p1p/qp6/4p1p1/5PP1/P7/1PPPPB1P/NBQRKR1N w FDfd - 2 9
 perft 1 26
 perft 2 645
@@ -2844,7 +2845,7 @@ perft 4 445464
 perft 5 11911314
 perft 6 342563372
 
-id 1
+id 316
 epd nqr1krbn/pppp1ppp/8/8/3pP3/5P2/PPPb1NPP/NQRBKRB1 w FCfc - 3 9
 perft 1 2
 perft 2 51
@@ -2853,7 +2854,7 @@ perft 4 27743
 perft 5 612305
 perft 6 17040200
 
-id 1
+id 317
 epd n1rkrbbn/pqppppp1/7p/1p6/8/1NPP4/PP1KPPPP/1QR1RBBN w ec - 0 9
 perft 1 25
 perft 2 674
@@ -2862,7 +2863,7 @@ perft 4 505337
 perft 5 13421727
 perft 6 403551903
 
-id 1
+id 318
 epd 1qrkrnbb/1p1p1ppp/pnp1p3/8/3PP3/P6P/1PP2PP1/NQRKRNBB w ECec - 0 9
 perft 1 24
 perft 2 688
@@ -2871,7 +2872,7 @@ perft 4 511444
 perft 5 13322502
 perft 6 403441498
 
-id 1
+id 319
 epd 1bnrqkrn/2ppppp1/p7/1p1b3p/3PP1P1/8/PPPQ1P1P/BBNR1KRN w GDgd - 1 9
 perft 1 35
 perft 2 925
@@ -2880,7 +2881,7 @@ perft 4 857060
 perft 5 30458921
 perft 6 824344087
 
-id 1
+id 320
 epd bnrbqkr1/ppp2pp1/6n1/3pp2p/1P6/2N3N1/P1PPPPPP/B1RBQRK1 w gc - 0 9
 perft 1 23
 perft 2 704
@@ -2889,7 +2890,7 @@ perft 4 539587
 perft 5 14154852
 perft 6 450893738
 
-id 1
+id 321
 epd 1nrqkbrn/p1pppppp/8/1p1b4/P6P/5P2/1PPPP1P1/BNRQKBRN w GCgc - 1 9
 perft 1 19
 perft 2 505
@@ -2898,7 +2899,7 @@ perft 4 281422
 perft 5 6450025
 perft 6 175593967
 
-id 1
+id 322
 epd b1rqkrnb/ppppppp1/8/6p1/3n4/NP6/P1PPPP1P/B1RQKRNB w FCfc - 0 9
 perft 1 25
 perft 2 614
@@ -2907,7 +2908,7 @@ perft 4 377660
 perft 5 10391021
 perft 6 259629603
 
-id 1
+id 323
 epd nbbrqkrn/ppp3p1/3pp3/5p1p/1P2P3/P7/2PPQPPP/NBBR1KRN w GDgd - 0 9
 perft 1 30
 perft 2 833
@@ -2916,7 +2917,7 @@ perft 4 717713
 perft 5 22873901
 perft 6 649556666
 
-id 1
+id 324
 epd nr1bqrk1/ppp1pppp/6n1/3pP3/8/5PQb/PPPP2PP/NRBB1KRN w GB - 3 9
 perft 1 26
 perft 2 734
@@ -2925,7 +2926,7 @@ perft 4 582591
 perft 5 17199594
 perft 6 512134836
 
-id 1
+id 325
 epd 1rbqkbr1/ppppp1pp/1n6/4np2/3P1P2/6P1/PPPQP2P/NRB1KBRN w GBgb - 1 9
 perft 1 27
 perft 2 662
@@ -2934,7 +2935,7 @@ perft 4 447464
 perft 5 13038519
 perft 6 338365642
 
-id 1
+id 326
 epd nr1qkr1b/ppp1pp1p/4bn2/3p2p1/4P3/1Q6/PPPP1PPP/NRB1KRNB w FBfb - 4 9
 perft 1 33
 perft 2 939
@@ -2943,7 +2944,7 @@ perft 4 942138
 perft 5 30995969
 perft 6 991509814
 
-id 1
+id 327
 epd nb1qbkrn/pprp1pp1/7p/2p1pB2/Q1PP4/8/PP2PPPP/N1R1BKRN w GCg - 2 9
 perft 1 47
 perft 2 1128
@@ -2952,7 +2953,7 @@ perft 4 1306753
 perft 5 56747878
 perft 6 1560584212
 
-id 1
+id 328
 epd nrqb1rkn/pp2pppp/2bp4/2p5/6P1/2P3N1/PP1PPP1P/NRQBBRK1 w - - 3 9
 perft 1 24
 perft 2 828
@@ -2961,7 +2962,7 @@ perft 4 723705
 perft 5 19506135
 perft 6 668969549
 
-id 1
+id 329
 epd nrq1bbrn/ppkpp2p/2p3p1/P4p2/8/4P1N1/1PPP1PPP/NRQKBBR1 w GB - 0 9
 perft 1 25
 perft 2 525
@@ -2970,7 +2971,7 @@ perft 4 309994
 perft 5 8250997
 perft 6 201795680
 
-id 1
+id 330
 epd Br1kbrn1/pqpppp2/8/6pp/3b2P1/1N6/PPPPPP1P/1RQKBRN1 w FBfb - 3 9
 perft 1 20
 perft 2 790
@@ -2979,7 +2980,7 @@ perft 4 695905
 perft 5 17735648
 perft 6 669854148
 
-id 1
+id 331
 epd nbrqkrbn/2p1p1pp/p7/1p1p1p2/4P1P1/5P2/PPPP3P/NBRQKRBN w FCfc - 0 9
 perft 1 29
 perft 2 771
@@ -2988,7 +2989,7 @@ perft 4 647106
 perft 5 19192982
 perft 6 591335970
 
-id 1
+id 332
 epd 1rqbkrbn/1ppppp1p/1n6/p1N3p1/8/2P4P/PP1PPPP1/1RQBKRBN w FBfb - 0 9
 perft 1 29
 perft 2 502
@@ -2997,7 +2998,7 @@ perft 4 287739
 perft 5 8652810
 perft 6 191762235
 
-id 1
+id 333
 epd 1rqkrbbn/ppnpp1pp/8/2p5/6p1/3P4/PPP1PPPP/NRK1RBBN w eb - 0 9
 perft 1 19
 perft 2 531
@@ -3006,7 +3007,7 @@ perft 4 300384
 perft 5 6506674
 perft 6 184309316
 
-id 1
+id 334
 epd nrqkrnbb/p1pp2pp/5p2/4P3/2p5/4N3/PP1PP1PP/NRQKR1BB w EBeb - 0 9
 perft 1 26
 perft 2 800
@@ -3015,7 +3016,7 @@ perft 4 756695
 perft 5 23952941
 perft 6 809841274
 
-id 1
+id 335
 epd bbnrkqrn/pp3pp1/4p2p/2pp4/4P1P1/1PB5/P1PP1P1P/1BNRKQRN w GDgd - 0 9
 perft 1 33
 perft 2 915
@@ -3024,7 +3025,7 @@ perft 4 878648
 perft 5 29602610
 perft 6 881898159
 
-id 1
+id 336
 epd bnrbkqr1/1p2pppp/6n1/p1pp4/7P/P3P3/1PPPKPP1/BNRB1QRN w gc - 0 9
 perft 1 19
 perft 2 457
@@ -3033,7 +3034,7 @@ perft 4 238944
 perft 5 5356253
 perft 6 144653627
 
-id 1
+id 337
 epd b1rkqbrn/pp1p2pp/2n1p3/2p2p2/3P2PP/8/PPP1PP2/BNKRQBRN w gc - 0 9
 perft 1 30
 perft 2 985
@@ -3042,7 +3043,7 @@ perft 4 1011700
 perft 5 32684185
 perft 6 1080607773
 
-id 1
+id 338
 epd b1rkqrnb/2ppppp1/np6/p6p/1P6/P2P3P/2P1PPP1/BNRKQRNB w FCfc - 0 9
 perft 1 26
 perft 2 692
@@ -3051,7 +3052,7 @@ perft 4 517703
 perft 5 14561181
 perft 6 413226841
 
-id 1
+id 339
 epd nbbrkqrn/1ppp1p2/p6p/4p1p1/5P2/1P5P/P1PPPNP1/NBBRKQR1 w GDgd - 0 9
 perft 1 22
 perft 2 561
@@ -3060,7 +3061,7 @@ perft 4 367487
 perft 5 9307003
 perft 6 273928315
 
-id 1
+id 340
 epd nrbbkqrn/p1pppppp/8/1p6/4P3/7Q/PPPP1PPP/NRBBK1RN w GBgb - 0 9
 perft 1 38
 perft 2 769
@@ -3069,7 +3070,7 @@ perft 4 632310
 perft 5 23091070
 perft 6 560139600
 
-id 1
+id 341
 epd nrbkqbrn/1pppp2p/8/p4pp1/P4PQ1/8/1PPPP1PP/NRBK1BRN w GBgb - 0 9
 perft 1 23
 perft 2 507
@@ -3078,7 +3079,7 @@ perft 4 321423
 perft 5 8887567
 perft 6 237475184
 
-id 1
+id 342
 epd nr1kqr1b/pp2pppp/5n2/2pp4/P5b1/5P2/1PPPPRPP/NRBK1QNB w Bfb - 2 9
 perft 1 18
 perft 2 626
@@ -3087,7 +3088,7 @@ perft 4 434138
 perft 5 9465555
 perft 6 335004239
 
-id 1
+id 343
 epd nbkrbqrn/1pppppp1/8/4P2p/pP6/P7/2PP1PPP/NBRKBQRN w GC - 0 9
 perft 1 22
 perft 2 329
@@ -3096,7 +3097,7 @@ perft 4 148351
 perft 5 4160034
 perft 6 82875306
 
-id 1
+id 344
 epd nrkb1qrn/pp1pp1pp/8/5p1b/P1p4P/6N1/1PPPPPP1/NRKBBQR1 w GBgb - 2 9
 perft 1 16
 perft 2 479
@@ -3105,7 +3106,7 @@ perft 4 275354
 perft 5 5862341
 perft 6 184959796
 
-id 1
+id 345
 epd 1rkq1brn/ppppp1pp/1n6/3b1p2/3N3P/5P2/PPPPP1P1/1RKQBBRN w GBgb - 3 9
 perft 1 23
 perft 2 614
@@ -3114,7 +3115,7 @@ perft 4 418395
 perft 5 11090645
 perft 6 313526088
 
-id 1
+id 346
 epd nrk1brnb/pp1ppppp/2p5/3q4/5P2/PP6/1KPPP1PP/NR1QBRNB w fb - 1 9
 perft 1 25
 perft 2 942
@@ -3123,7 +3124,7 @@ perft 4 792179
 perft 5 19318837
 perft 6 685549171
 
-id 1
+id 347
 epd nbrkqr1n/1pppp2p/p4pp1/2Bb4/5P2/6P1/PPPPP2P/NBRKQ1RN w Cfc - 2 9
 perft 1 30
 perft 2 841
@@ -3132,7 +3133,7 @@ perft 4 677876
 perft 5 20145765
 perft 6 557578726
 
-id 1
+id 348
 epd n1kbqrbn/2p1pppp/1r6/pp1p4/P7/3P4/1PP1PPPP/NRKBQRBN w FBf - 2 9
 perft 1 21
 perft 2 591
@@ -3141,7 +3142,7 @@ perft 4 394289
 perft 5 10295086
 perft 6 292131422
 
-id 1
+id 349
 epd nrkqrbb1/ppp1pppp/3p4/8/4P3/2Pn1P2/PP4PP/NRKQRBBN w EBeb - 0 9
 perft 1 4
 perft 2 88
@@ -3150,7 +3151,7 @@ perft 4 73414
 perft 5 2640555
 perft 6 66958031
 
-id 1
+id 350
 epd nrkqrnbb/ppppp1p1/7p/1P3p2/3P4/2P5/P3PPPP/NRKQRNBB w EBeb - 0 9
 perft 1 29
 perft 2 689
@@ -3159,7 +3160,7 @@ perft 4 508789
 perft 5 16226660
 perft 6 408570219
 
-id 1
+id 351
 epd bbnr1rqn/pp2pkpp/2pp1p2/8/4P1P1/8/PPPP1P1P/BBNRKRQN w FD - 0 9
 perft 1 21
 perft 2 463
@@ -3168,7 +3169,7 @@ perft 4 256244
 perft 5 6826249
 perft 6 165025370
 
-id 1
+id 352
 epd bnrbk1qn/1pppprpp/8/p4p1P/6P1/3P4/PPP1PP2/BNRBKRQN w FCc - 0 9
 perft 1 22
 perft 2 459
@@ -3177,7 +3178,7 @@ perft 4 268157
 perft 5 7371098
 perft 6 190583454
 
-id 1
+id 353
 epd 1nrkrbqn/p1pp1ppp/4p3/1p6/1PP5/6PB/P2PPPbP/BNRKR1QN w ECec - 0 9
 perft 1 30
 perft 2 931
@@ -3186,7 +3187,7 @@ perft 4 887414
 perft 5 28412902
 perft 6 869228014
 
-id 1
+id 354
 epd b1rkr1nb/pppppqp1/n4B2/7p/8/1P4P1/P1PPPP1P/1NKRRQNB w ec - 1 9
 perft 1 36
 perft 2 934
@@ -3195,7 +3196,7 @@ perft 4 930926
 perft 5 30392925
 perft 6 952871799
 
-id 1
+id 355
 epd nbbrkrqn/p1ppp1p1/8/1p3p1p/2P3PP/8/PP1PPPQ1/NBBRKR1N w FDfd - 0 9
 perft 1 34
 perft 2 938
@@ -3204,7 +3205,7 @@ perft 4 921716
 perft 5 31185844
 perft 6 944483246
 
-id 1
+id 356
 epd 1rbbkrqn/ppp1pp2/1n1p2p1/7p/P3P1P1/3P4/1PP2P1P/NRBBKRQN w FBfb - 0 9
 perft 1 26
 perft 2 646
@@ -3213,7 +3214,7 @@ perft 4 472744
 perft 5 14006203
 perft 6 384101783
 
-id 1
+id 357
 epd nrbkrbq1/Qpppp1pp/2n5/5p2/P4P2/6N1/1PPPP1PP/NRBKRB2 w EBeb - 1 9
 perft 1 27
 perft 2 619
@@ -3222,7 +3223,7 @@ perft 4 421845
 perft 5 11718463
 perft 6 313794027
 
-id 1
+id 358
 epd 1rbkr1nb/pppp1qpp/1n6/4pp2/1PP1P3/8/PB1P1PPP/NR1KRQNB w EBeb - 1 9
 perft 1 32
 perft 2 1029
@@ -3231,7 +3232,7 @@ perft 4 1080977
 perft 5 35483796
 perft 6 1181835398
 
-id 1
+id 359
 epd nbrk1rqn/p1ppp2p/1p6/5ppb/8/1N2P2P/PPPP1PP1/1BKRBRQN w fc - 0 9
 perft 1 18
 perft 2 594
@@ -3240,7 +3241,7 @@ perft 4 408544
 perft 5 9329122
 perft 6 315021712
 
-id 1
+id 360
 epd nrkbbrqn/3pppp1/7p/ppp5/P7/1N5P/1PPPPPP1/1RKBBRQN w FBfb - 0 9
 perft 1 19
 perft 2 417
@@ -3249,7 +3250,7 @@ perft 4 218513
 perft 5 5236331
 perft 6 137024458
 
-id 1
+id 361
 epd nrkr1bqn/ppp1pppp/3p4/1b6/7P/P7/1PPPPPP1/NRKRBBQN w DBdb - 1 9
 perft 1 17
 perft 2 457
@@ -3258,7 +3259,7 @@ perft 4 243872
 perft 5 5503579
 perft 6 150091997
 
-id 1
+id 362
 epd nrkrbqnb/p4ppp/1p2p3/2pp4/6P1/2P2N2/PPNPPP1P/1RKRBQ1B w DBdb - 0 9
 perft 1 27
 perft 2 755
@@ -3267,7 +3268,7 @@ perft 4 620093
 perft 5 17883987
 perft 6 547233320
 
-id 1
+id 363
 epd nbkrr1bn/ppB2ppp/4p3/2qp4/4P3/5P2/PPPP2PP/NBRKRQ1N w EC - 1 9
 perft 1 37
 perft 2 1473
@@ -3276,7 +3277,7 @@ perft 4 1956521
 perft 5 68070015
 perft 6 2490912491
 
-id 1
+id 364
 epd n1kbrqbn/p1pp1pp1/4p2p/2B5/1r3P2/8/PPPPP1PP/NRKBRQ1N w EBe - 2 9
 perft 1 30
 perft 2 1029
@@ -3285,7 +3286,7 @@ perft 4 1053163
 perft 5 32318550
 perft 6 1106487743
 
-id 1
+id 365
 epd nrkrqbbn/2pppp1p/8/pp6/1P1P2p1/P5P1/2P1PP1P/NRKRQBBN w DBdb - 0 9
 perft 1 22
 perft 2 421
@@ -3294,7 +3295,7 @@ perft 4 221927
 perft 5 5754555
 perft 6 141245633
 
-id 1
+id 366
 epd nrkr1nbb/1ppp2pp/p3q3/4pp2/2P5/P3P3/1PKP1PPP/NR1RQNBB w db - 0 9
 perft 1 22
 perft 2 619
@@ -3303,7 +3304,7 @@ perft 4 411392
 perft 5 9905109
 perft 6 301403003
 
-id 1
+id 367
 epd bbnrkrnq/1pp1p2p/6p1/p2p1p2/8/1P2P3/P1PP1PPP/BBNRKRNQ w FDfd - 0 9
 perft 1 27
 perft 2 805
@@ -3312,7 +3313,7 @@ perft 4 688224
 perft 5 19133881
 perft 6 620749189
 
-id 1
+id 368
 epd bnrbkrn1/pp1ppp2/2p3pp/8/2Pq4/P4PP1/1P1PP2P/BNRBKRNQ w FCfc - 1 9
 perft 1 20
 perft 2 770
@@ -3321,7 +3322,7 @@ perft 4 577980
 perft 5 13581691
 perft 6 456736500
 
-id 1
+id 369
 epd b1rkrbnq/1pp1pppp/2np4/p5N1/8/1P2P3/P1PP1PPP/BNRKRB1Q w ECec - 0 9
 perft 1 37
 perft 2 740
@@ -3330,7 +3331,7 @@ perft 4 581744
 perft 5 21156664
 perft 6 485803600
 
-id 1
+id 370
 epd b1krrnqb/pp1ppp1p/n1p3p1/2N5/6P1/8/PPPPPP1P/B1RKRNQB w EC - 0 9
 perft 1 34
 perft 2 850
@@ -3339,7 +3340,7 @@ perft 4 752350
 perft 5 25360295
 perft 6 698159474
 
-id 1
+id 371
 epd 1bbr1rnq/ppppkppp/8/3np3/4P3/3P4/PPP1KPPP/NBBRR1NQ w - - 1 9
 perft 1 27
 perft 2 704
@@ -3348,7 +3349,7 @@ perft 4 480474
 perft 5 12817011
 perft 6 341026662
 
-id 1
+id 372
 epd nrbbk1nq/p1p1prpp/1p6/N2p1p2/P7/8/1PPPPPPP/R1BBKRNQ w Fb - 2 9
 perft 1 23
 perft 2 552
@@ -3357,7 +3358,7 @@ perft 4 348593
 perft 5 9236564
 perft 6 248469879
 
-id 1
+id 373
 epd 1rbkrb1q/1pppp1pp/1n5n/p4p2/P3P3/1P6/2PPNPPP/NRBKRB1Q w EBeb - 1 9
 perft 1 22
 perft 2 415
@@ -3366,7 +3367,7 @@ perft 4 217224
 perft 5 5735644
 perft 6 135295774
 
-id 1
+id 374
 epd nrbkr1qb/1pp1pppp/6n1/p2p4/2P1P3/1N4N1/PP1P1PPP/1RBKR1QB w EBeb - 0 9
 perft 1 27
 perft 2 709
@@ -3375,7 +3376,7 @@ perft 4 506214
 perft 5 14192779
 perft 6 380516508
 
-id 1
+id 375
 epd nbrkbrnq/p3p1pp/1pp2p2/3p4/1PP5/4P3/P1KP1PPP/NBR1BRNQ w fc - 0 9
 perft 1 24
 perft 2 715
@@ -3384,7 +3385,7 @@ perft 4 535054
 perft 5 14322279
 perft 6 427269976
 
-id 1
+id 376
 epd nrk1brnq/pp1p1pp1/7p/b1p1p3/1P6/6P1/P1PPPPQP/NRKBBRN1 w FBfb - 2 9
 perft 1 29
 perft 2 675
@@ -3393,7 +3394,7 @@ perft 4 492124
 perft 5 15316285
 perft 6 389051744
 
-id 1
+id 377
 epd nrkr1bnq/1p2pppp/p2p4/1bp5/PP6/1R5N/2PPPPPP/N1KRBB1Q w Ddb - 2 9
 perft 1 27
 perft 2 744
@@ -3402,7 +3403,7 @@ perft 4 571209
 perft 5 16188945
 perft 6 458900901
 
-id 1
+id 378
 epd nrk1b1qb/pppn1ppp/3rp3/3p4/2P3P1/3P4/PPN1PP1P/1RKRBNQB w DBb - 3 9
 perft 1 35
 perft 2 941
@@ -3411,7 +3412,7 @@ perft 4 935791
 perft 5 33150360
 perft 6 968024386
 
-id 1
+id 379
 epd nb1rrnbq/ppkp1ppp/8/2p1p3/P7/1N2P3/1PPP1PPP/1BKRRNBQ w - - 1 9
 perft 1 19
 perft 2 451
@@ -3420,7 +3421,7 @@ perft 4 235472
 perft 5 5506897
 perft 6 139436165
 
-id 1
+id 380
 epd nrkbrnbq/4pppp/1ppp4/p7/2P1P3/3P2N1/PP3PPP/NRKBR1BQ w EBeb - 0 9
 perft 1 29
 perft 2 591
@@ -3429,7 +3430,7 @@ perft 4 384358
 perft 5 11245508
 perft 6 270967202
 
-id 1
+id 381
 epd nrkrnbbq/3p1ppp/1p6/p1p1p3/3P2P1/P4Q2/1PP1PP1P/NRKRNBB1 w DBdb - 0 9
 perft 1 38
 perft 2 792
@@ -3438,7 +3439,7 @@ perft 4 640961
 perft 5 22654797
 perft 6 540864616
 
-id 1
+id 382
 epd nr1rnqbb/ppp1pp1p/3k2p1/3p4/1P5P/3P1N2/P1P1PPP1/NRKR1QBB w DB - 1 9
 perft 1 25
 perft 2 758
@@ -3447,7 +3448,7 @@ perft 4 543643
 perft 5 13890077
 perft 6 402109399
 
-id 1
+id 383
 epd bbqrnnkr/1ppp1p1p/5p2/p5p1/P7/1P4P1/2PPPP1P/1BQRNNKR w HDhd - 0 9
 perft 1 20
 perft 2 322
@@ -3456,7 +3457,7 @@ perft 4 145818
 perft 5 3588435
 perft 6 82754650
 
-id 1
+id 384
 epd bqrb2k1/pppppppr/5nnp/8/3P1P2/4P1N1/PPP3PP/BQRBN1KR w HCc - 1 9
 perft 1 25
 perft 2 597
@@ -3465,7 +3466,7 @@ perft 4 397970
 perft 5 11162476
 perft 6 295682250
 
-id 1
+id 385
 epd bqrnn1kr/1pppbppp/8/4p3/1p6/2P1N2P/P2PPPP1/BQR1NBKR w HChc - 1 9
 perft 1 34
 perft 2 921
@@ -3474,7 +3475,7 @@ perft 4 864023
 perft 5 30126510
 perft 6 850296236
 
-id 1
+id 386
 epd bqr1nkr1/pppppp2/2n3p1/7p/1P1b1P2/8/PQP1P1PP/B1RNNKRB w GCgc - 0 9
 perft 1 23
 perft 2 788
@@ -3483,7 +3484,7 @@ perft 4 686795
 perft 5 20849374
 perft 6 645694580
 
-id 1
+id 387
 epd qbbrnn1r/1pppp1pk/p7/5p1p/P2P3P/3N4/1PP1PPP1/QBBR1NKR w HD - 0 9
 perft 1 34
 perft 2 713
@@ -3492,7 +3493,7 @@ perft 4 562189
 perft 5 19494094
 perft 6 482645160
 
-id 1
+id 388
 epd qrbb2kr/p1pppppp/1p1n4/8/1P3n2/P7/Q1PPP1PP/1RBBNNKR w HBhb - 0 9
 perft 1 28
 perft 2 977
@@ -3501,7 +3502,7 @@ perft 4 949925
 perft 5 27802999
 perft 6 992109168
 
-id 1
+id 389
 epd qrb2bkr/1pp1pppp/2np1n2/pN6/3P4/4B3/PPP1PPPP/QR2NBKR w HBhb - 0 9
 perft 1 27
 perft 2 730
@@ -3510,7 +3511,7 @@ perft 4 585091
 perft 5 17005916
 perft 6 507008968
 
-id 1
+id 390
 epd qrbnnkrb/pp2pp1p/8/2pp2p1/7P/P1P5/QP1PPPP1/1RBNNKRB w GBgb - 0 9
 perft 1 24
 perft 2 813
@@ -3519,7 +3520,7 @@ perft 4 707925
 perft 5 19615756
 perft 6 655850285
 
-id 1
+id 391
 epd 1brnb1kr/p1pppppp/1p6/8/4q2n/1P2P1P1/PNPP1P1P/QBR1BNKR w HChc - 3 9
 perft 1 17
 perft 2 734
@@ -3528,7 +3529,7 @@ perft 4 530809
 perft 5 11032633
 perft 6 416356876
 
-id 1
+id 392
 epd 1rnbbnkr/1pp1pppp/1q1p4/p7/4P3/5PN1/PPPP1BPP/QRNB2KR w HBhb - 1 9
 perft 1 26
 perft 2 809
@@ -3537,7 +3538,7 @@ perft 4 706677
 perft 5 20292750
 perft 6 675408811
 
-id 1
+id 393
 epd qrnnbb1Q/ppp1pk1p/3p2p1/5p2/PP6/5P2/2PPP1PP/1RNNBBKR w HB - 0 9
 perft 1 37
 perft 2 751
@@ -3546,7 +3547,7 @@ perft 4 603931
 perft 5 22443036
 perft 6 515122176
 
-id 1
+id 394
 epd qrnnbkrb/p3p1pp/3p1p2/1pp5/PP2P3/8/2PP1PPP/QRNNBRKB w gb - 0 9
 perft 1 30
 perft 2 906
@@ -3555,7 +3556,7 @@ perft 4 872526
 perft 5 27658191
 perft 6 890966633
 
-id 1
+id 395
 epd qbrnnkbr/1p2pp1p/p1p3p1/3p4/6P1/P1N4P/1PPPPP2/QBR1NKBR w HChc - 0 9
 perft 1 26
 perft 2 701
@@ -3564,7 +3565,7 @@ perft 4 521377
 perft 5 14733245
 perft 6 416881799
 
-id 1
+id 396
 epd qr1b1kbr/1p1ppppp/1n1n4/p1p5/4P3/5NPP/PPPP1P2/QRNB1KBR w HBhb - 1 9
 perft 1 26
 perft 2 649
@@ -3573,7 +3574,7 @@ perft 4 451997
 perft 5 12367604
 perft 6 342165821
 
-id 1
+id 397
 epd qrnnkb1r/1pppppp1/7p/p4b2/4P3/5P1P/PPPP2PR/QRNNKBB1 w Bhb - 1 9
 perft 1 34
 perft 2 941
@@ -3582,7 +3583,7 @@ perft 4 901240
 perft 5 30307554
 perft 6 888709821
 
-id 1
+id 398
 epd qr1nkrbb/p2ppppp/1pp5/8/3Pn3/1NP3P1/PP2PP1P/QR1NKRBB w FBfb - 1 9
 perft 1 19
 perft 2 505
@@ -3591,7 +3592,7 @@ perft 4 294251
 perft 5 7046501
 perft 6 190414579
 
-id 1
+id 399
 epd bbrqn1kr/1pppp1pp/4n3/5p2/p5P1/3P4/PPP1PPKP/BBRQNN1R w hc - 0 9
 perft 1 24
 perft 2 573
@@ -3600,7 +3601,7 @@ perft 4 335845
 perft 5 8191054
 perft 6 227555387
 
-id 1
+id 400
 epd brqb1nkr/pppppp1p/8/4N1pn/5P2/6P1/PPPPP2P/BRQB1NKR w HBhb - 0 9
 perft 1 26
 perft 2 550
@@ -3609,7 +3610,7 @@ perft 4 331666
 perft 5 8903754
 perft 6 223437427
 
-id 1
+id 401
 epd brqnn1kr/pp3ppp/2pbp3/3p4/8/2NPP3/PPP1BPPP/BRQ1N1KR w HBhb - 0 9
 perft 1 27
 perft 2 780
@@ -3618,7 +3619,7 @@ perft 4 589328
 perft 5 16243731
 perft 6 463883447
 
-id 1
+id 402
 epd brq1nkrb/ppp2ppp/8/n2pp2P/P7/4P3/1PPP1PP1/BRQNNKRB w GBgb - 1 9
 perft 1 17
 perft 2 426
@@ -3627,7 +3628,7 @@ perft 4 235162
 perft 5 5048497
 perft 6 153986034
 
-id 1
+id 403
 epd rbbqn1kr/pp2p1pp/6n1/2pp1p2/2P4P/P7/BP1PPPP1/R1BQNNKR w HAha - 0 9
 perft 1 27
 perft 2 916
@@ -3636,7 +3637,7 @@ perft 4 890435
 perft 5 26302461
 perft 6 924181432
 
-id 1
+id 404
 epd 1qbbn1kr/1ppppppp/r3n3/8/p1P5/P7/1P1PPPPP/RQBBNNKR w HAh - 1 9
 perft 1 29
 perft 2 817
@@ -3645,7 +3646,7 @@ perft 4 720277
 perft 5 22147642
 perft 6 670707652
 
-id 1
+id 405
 epd rqbnnbkr/ppp1ppp1/7p/3p4/PP6/7P/1NPPPPP1/RQB1NBKR w HAa - 1 9
 perft 1 23
 perft 2 572
@@ -3654,7 +3655,7 @@ perft 4 381474
 perft 5 10416981
 perft 6 288064942
 
-id 1
+id 406
 epd r1bnnkrb/q1ppp1pp/p7/1p3pB1/2P1P3/3P4/PP3PPP/RQ1NNKRB w GAga - 2 9
 perft 1 31
 perft 2 925
@@ -3663,7 +3664,7 @@ perft 4 860969
 perft 5 26316355
 perft 6 843078864
 
-id 1
+id 407
 epd rbqnb1kr/ppppp1pp/5p2/5N2/7P/1n3P2/PPPPP1P1/RBQNB1KR w HAha - 1 9
 perft 1 32
 perft 2 864
@@ -3672,7 +3673,7 @@ perft 4 766551
 perft 5 24738875
 perft 6 707188107
 
-id 1
+id 408
 epd rqnbbn1r/ppppppp1/6k1/8/6Pp/2PN4/PP1PPPKP/RQ1BBN1R w - - 0 9
 perft 1 27
 perft 2 566
@@ -3681,7 +3682,7 @@ perft 4 347059
 perft 5 9714509
 perft 6 234622128
 
-id 1
+id 409
 epd rqnnbbkr/p1p2pp1/1p1p3p/4p3/4NP2/6P1/PPPPP2P/RQN1BBKR w HAha - 0 9
 perft 1 27
 perft 2 631
@@ -3690,7 +3691,7 @@ perft 4 452734
 perft 5 13307890
 perft 6 356279813
 
-id 1
+id 410
 epd 1qnnbrkb/rppp1ppp/p3p3/8/4P3/2PP1P2/PP4PP/RQNNBKRB w GA - 1 9
 perft 1 24
 perft 2 479
@@ -3699,7 +3700,7 @@ perft 4 271469
 perft 5 7204345
 perft 6 175460841
 
-id 1
+id 411
 epd rbqnn1br/p1pppk1p/1p4p1/5p2/8/P1P2P2/1PBPP1PP/R1QNNKBR w HA - 0 9
 perft 1 31
 perft 2 756
@@ -3708,7 +3709,7 @@ perft 4 625194
 perft 5 20036784
 perft 6 554292502
 
-id 1
+id 412
 epd rqnbnkbr/1ppppp2/p5p1/8/1P4p1/4PP2/P1PP3P/RQNBNKBR w HAha - 0 9
 perft 1 24
 perft 2 715
@@ -3717,7 +3718,7 @@ perft 4 575589
 perft 5 16013189
 perft 6 515078271
 
-id 1
+id 413
 epd rq1nkbbr/1p2pppp/p2n4/2pp4/1P4P1/P2N4/2PPPP1P/RQ1NKBBR w HAha - 1 9
 perft 1 27
 perft 2 694
@@ -3726,7 +3727,7 @@ perft 4 552904
 perft 5 16685687
 perft 6 494574415
 
-id 1
+id 414
 epd r1nnkrbb/pp1pppp1/2p3q1/7p/8/1PPP3P/P3PPP1/RQNNKRBB w FAfa - 1 9
 perft 1 18
 perft 2 520
@@ -3735,7 +3736,7 @@ perft 4 329085
 perft 5 7508201
 perft 6 235103697
 
-id 1
+id 415
 epd bbrnqk1r/pppp3p/6p1/4pp2/3P2P1/8/PPP1PP1P/BBRN1NKR w HC - 0 9
 perft 1 22
 perft 2 566
@@ -3744,7 +3745,7 @@ perft 4 362624
 perft 5 8721079
 perft 6 259069471
 
-id 1
+id 416
 epd brnb1nkr/pppqpp2/3p2pp/8/3PP3/1P6/PBP2PPP/1RNBQNKR w HBhb - 0 9
 perft 1 32
 perft 2 859
@@ -3753,7 +3754,7 @@ perft 4 817464
 perft 5 27734108
 perft 6 829785474
 
-id 1
+id 417
 epd brnq1b1r/ppp1ppkp/3p1np1/8/8/5P1P/PPPPPKPR/BRNQNB2 w - - 0 9
 perft 1 21
 perft 2 511
@@ -3762,7 +3763,7 @@ perft 4 273756
 perft 5 6372681
 perft 6 167139732
 
-id 1
+id 418
 epd brnq1rkb/1pppppp1/3n3p/p7/8/P4NP1/1PPPPPRP/BRNQ1K1B w B - 0 9
 perft 1 25
 perft 2 548
@@ -3771,7 +3772,7 @@ perft 4 341208
 perft 5 9015901
 perft 6 235249649
 
-id 1
+id 419
 epd rbb1qnkr/p1ppp1pp/1p3p2/6n1/8/1PN1P2P/P1PP1PP1/RBB1QNKR w HAha - 0 9
 perft 1 25
 perft 2 673
@@ -3780,7 +3781,7 @@ perft 4 467660
 perft 5 12099119
 perft 6 361714466
 
-id 1
+id 420
 epd rnbb1nkr/1ppp1ppp/4p3/p5q1/6P1/1PP5/PB1PPP1P/RN1BQNKR w HAha - 1 9
 perft 1 19
 perft 2 663
@@ -3789,7 +3790,7 @@ perft 4 489653
 perft 5 11491355
 perft 6 399135495
 
-id 1
+id 421
 epd rnbqnbkr/1pp1p2p/3p1p2/p5p1/5PP1/2P5/PPNPP2P/RNBQ1BKR w HAha - 0 9
 perft 1 24
 perft 2 647
@@ -3798,7 +3799,7 @@ perft 4 461931
 perft 5 12649636
 perft 6 361157611
 
-id 1
+id 422
 epd rnb2krb/pppqppnp/8/3p2p1/1P4P1/7P/P1PPPPB1/RNBQNKR1 w GAga - 1 9
 perft 1 24
 perft 2 722
@@ -3807,7 +3808,7 @@ perft 4 605229
 perft 5 16609220
 perft 6 563558512
 
-id 1
+id 423
 epd rbnqb1kr/pppn1pp1/3p3p/4p3/1P6/P7/R1PPPPPP/1BNQBNKR w Hha - 1 9
 perft 1 20
 perft 2 538
@@ -3816,7 +3817,7 @@ perft 4 345704
 perft 5 8687621
 perft 6 255304141
 
-id 1
+id 424
 epd rnqb1nkr/p1pbp1pp/8/1pPp1p2/P2P4/8/1P2PPPP/RNQBBNKR w HAha - 1 9
 perft 1 35
 perft 2 764
@@ -3825,7 +3826,7 @@ perft 4 632796
 perft 5 22592380
 perft 6 564255328
 
-id 1
+id 425
 epd rnq1bbkr/1p1ppp1p/4n3/p1p3p1/P1PP4/8/RP2PPPP/1NQNBBKR w Hha - 0 9
 perft 1 29
 perft 2 709
@@ -3834,7 +3835,7 @@ perft 4 570580
 perft 5 17597398
 perft 6 506140370
 
-id 1
+id 426
 epd 1nqnbkrb/1pppp2p/r7/p4pp1/3P4/8/PPPBPPPP/RNQNK1RB w g - 0 9
 perft 1 27
 perft 2 1028
@@ -3843,7 +3844,7 @@ perft 4 1050834
 perft 5 30251988
 perft 6 1096869832
 
-id 1
+id 427
 epd rbnqnkbr/p1pp1p1p/8/1p2p3/3P2pP/2P5/PP2PPP1/RBNQNKBR w HAha - 0 9
 perft 1 32
 perft 2 832
@@ -3852,7 +3853,7 @@ perft 4 750336
 perft 5 24945574
 perft 6 724171581
 
-id 1
+id 428
 epd rnq1nkbr/1p1p1ppp/2p1pb2/p7/7P/2P5/PPNPPPPB/RNQB1K1R w HAha - 2 9
 perft 1 31
 perft 2 779
@@ -3861,7 +3862,7 @@ perft 4 638640
 perft 5 19919434
 perft 6 551494771
 
-id 1
+id 429
 epd rnqnk1br/p1ppp1bp/1p3p2/6p1/4N3/P5P1/1PPPPP1P/R1QNKBBR w HAha - 2 9
 perft 1 25
 perft 2 717
@@ -3870,7 +3871,7 @@ perft 4 576577
 perft 5 16525239
 perft 6 507175842
 
-id 1
+id 430
 epd rnq1krbb/p1p1pppp/8/1p1p4/1n5B/2N2P2/PPPPP1PP/RNQ1KR1B w FAfa - 0 9
 perft 1 28
 perft 2 867
@@ -3879,7 +3880,7 @@ perft 4 735686
 perft 5 21112751
 perft 6 654808184
 
-id 1
+id 431
 epd bbrnnqkr/1pp1pppp/3p4/p7/P3P3/7P/1PPP1PP1/BBRNNQKR w HChc - 0 9
 perft 1 24
 perft 2 405
@@ -3888,7 +3889,7 @@ perft 4 210557
 perft 5 6196438
 perft 6 131401224
 
-id 1
+id 432
 epd brnbnqkr/p1ppp3/1p5p/5Pp1/5P2/3N4/PPPPP2P/BRNB1QKR w HBhb g6 0 9
 perft 1 25
 perft 2 785
@@ -3897,7 +3898,7 @@ perft 4 698331
 perft 5 20687969
 perft 6 695850727
 
-id 1
+id 433
 epd br1nqbkr/1ppppp2/pn6/6pp/2PP4/1N4P1/PP2PP1P/BR1NQBKR w HBhb - 0 9
 perft 1 25
 perft 2 596
@@ -3906,7 +3907,7 @@ perft 4 421882
 perft 5 12185361
 perft 6 337805606
 
-id 1
+id 434
 epd 1rnnqkrb/p2ppp1p/1pp5/2N3p1/8/1P6/P1PPPPKP/BR1NQ1RB w gb - 0 9
 perft 1 38
 perft 2 960
@@ -3915,7 +3916,7 @@ perft 4 913665
 perft 5 32490040
 perft 6 880403591
 
-id 1
+id 435
 epd rbbnnqkr/pp3pp1/2p1p3/3p3p/3P3P/1PP5/P3PPP1/RBBNNQKR w HAha - 0 9
 perft 1 30
 perft 2 785
@@ -3924,7 +3925,7 @@ perft 4 656618
 perft 5 19885037
 perft 6 599219582
 
-id 1
+id 436
 epd rn1bnqkr/p1ppppp1/8/1p5p/P4P1P/3N4/1PPPP1b1/RNBB1QKR w HAha - 0 9
 perft 1 27
 perft 2 752
@@ -3933,7 +3934,7 @@ perft 4 613194
 perft 5 18862234
 perft 6 547415271
 
-id 1
+id 437
 epd 1nbnqbkr/1p1p1ppp/r3p3/p1p5/P3P3/3Q4/1PPP1PPP/RNBN1BKR w HAh - 2 9
 perft 1 33
 perft 2 721
@@ -3942,7 +3943,7 @@ perft 4 572535
 perft 5 19648535
 perft 6 496023732
 
-id 1
+id 438
 epd rnbnqkrb/2pppppp/1p6/p7/1PP5/4N2P/P2PPPP1/RNB1QKRB w GAg - 0 9
 perft 1 23
 perft 2 570
@@ -3951,7 +3952,7 @@ perft 4 374196
 perft 5 10022614
 perft 6 279545007
 
-id 1
+id 439
 epd rbnnbq1r/ppppppkp/6p1/N7/4P3/P7/1PPP1PPP/RB1NBQKR w HA - 5 9
 perft 1 27
 perft 2 620
@@ -3960,7 +3961,7 @@ perft 4 440594
 perft 5 13909432
 perft 6 349478320
 
-id 1
+id 440
 epd r1nbbqkr/pppppp1p/8/8/1n3Pp1/3N1QP1/PPPPP2P/RN1BB1KR w HAha - 0 9
 perft 1 31
 perft 2 791
@@ -3969,7 +3970,7 @@ perft 4 682579
 perft 5 22408813
 perft 6 636779732
 
-id 1
+id 441
 epd rnq1bbkr/pp1p1ppp/2pnp3/8/7P/1QP5/PP1PPPPR/RNN1BBK1 w Aha - 2 9
 perft 1 28
 perft 2 559
@@ -3978,7 +3979,7 @@ perft 4 390887
 perft 5 12242780
 perft 6 315431511
 
-id 1
+id 442
 epd rnnqbrkb/2ppppp1/1p1N4/p6p/4P3/8/PPPP1PPP/R1NQBKRB w GA - 0 9
 perft 1 32
 perft 2 638
@@ -3987,7 +3988,7 @@ perft 4 438792
 perft 5 14395828
 perft 6 331782223
 
-id 1
+id 443
 epd rbnnq1br/pppp1kp1/4pp2/7p/PP6/2PP4/4PPPP/RBNNQKBR w HA - 0 9
 perft 1 21
 perft 2 521
@@ -3996,7 +3997,7 @@ perft 4 320429
 perft 5 8239159
 perft 6 227346638
 
-id 1
+id 444
 epd rnnbqkbr/p2ppp2/7p/1pp3p1/2P2N2/8/PP1PPPPP/RN1BQKBR w HAha - 0 9
 perft 1 25
 perft 2 528
@@ -4005,7 +4006,7 @@ perft 4 326094
 perft 5 9079829
 perft 6 232750602
 
-id 1
+id 445
 epd rnn1kbbr/ppppqp2/6p1/2N1p2p/P7/2P5/1P1PPPPP/RN1QKBBR w HAha - 2 9
 perft 1 27
 perft 2 801
@@ -4014,7 +4015,7 @@ perft 4 707078
 perft 5 20334071
 perft 6 682580976
 
-id 1
+id 446
 epd rnnqkrbb/p1p1p1pp/1p3p2/8/3p2Q1/P1P1P3/1P1P1PPP/RNN1KRBB w FAfa - 0 9
 perft 1 37
 perft 2 1014
@@ -4023,7 +4024,7 @@ perft 4 998999
 perft 5 32921537
 perft 6 988770109
 
-id 1
+id 447
 epd bbrnk1qr/1pppppp1/p4n1p/8/P2P2N1/8/1PP1PPPP/BBR1NKQR w HC - 1 9
 perft 1 21
 perft 2 481
@@ -4032,7 +4033,7 @@ perft 4 279993
 perft 5 7015419
 perft 6 187564853
 
-id 1
+id 448
 epd brnbnkqr/1pp1p1p1/p2p1p2/7p/1P4PP/8/PBPPPP2/1RNBNKQR w HBhb - 0 9
 perft 1 31
 perft 2 743
@@ -4041,7 +4042,7 @@ perft 4 660177
 perft 5 22391185
 perft 6 653721389
 
-id 1
+id 449
 epd br2kbqr/ppppp1pp/3n1p2/3P4/3n3P/3N4/PPP1PPP1/BR1NKBQR w HBhb - 3 9
 perft 1 25
 perft 2 872
@@ -4050,7 +4051,7 @@ perft 4 748726
 perft 5 20281962
 perft 6 685749952
 
-id 1
+id 450
 epd br1nkqrb/ppppppp1/8/7p/4P3/n1P2PP1/PP1P3P/BRNNKQRB w GBgb - 0 9
 perft 1 28
 perft 2 607
@@ -4059,7 +4060,7 @@ perft 4 396483
 perft 5 11607818
 perft 6 294181806
 
-id 1
+id 451
 epd rbbn1kqr/pp1pp1p1/2pn3p/5p2/5P2/1P1N4/PNPPP1PP/RBB2KQR w HAha - 1 9
 perft 1 27
 perft 2 725
@@ -4068,7 +4069,7 @@ perft 4 616082
 perft 5 19239812
 perft 6 581716972
 
-id 1
+id 452
 epd rnbbnk1r/pp1ppp1p/6q1/2p5/PP4p1/4P3/2PP1PPP/RNBBNKQR w HAha - 1 9
 perft 1 25
 perft 2 1072
@@ -4077,7 +4078,7 @@ perft 4 1088978
 perft 5 28469879
 perft 6 1122703887
 
-id 1
+id 453
 epd rnbnkbqr/1pp3pp/3p4/p3pp2/3P2P1/2N1N3/PPP1PP1P/R1B1KBQR w HAha - 0 9
 perft 1 31
 perft 2 1028
@@ -4086,7 +4087,7 @@ perft 4 1095472
 perft 5 36025223
 perft 6 1211187800
 
-id 1
+id 454
 epd r1bnkqrb/1ppppppp/p3n3/8/6P1/4N3/PPPPPPRP/RNB1KQ1B w Aga - 1 9
 perft 1 23
 perft 2 457
@@ -4095,7 +4096,7 @@ perft 4 250551
 perft 5 6666787
 perft 6 159759052
 
-id 1
+id 455
 epd rbn1bkqr/p1pp1pp1/1pn5/4p2p/7P/1PBP4/P1P1PPP1/RBNN1KQR w HAha - 0 9
 perft 1 23
 perft 2 470
@@ -4104,7 +4105,7 @@ perft 4 264274
 perft 5 6963287
 perft 6 172833738
 
-id 1
+id 456
 epd rnnbbkqr/3ppppp/p7/1pp5/P6P/6P1/1PPPPP2/RNNBBKQR w HAha - 0 9
 perft 1 26
 perft 2 569
@@ -4113,7 +4114,7 @@ perft 4 375556
 perft 5 11008114
 perft 6 284485303
 
-id 1
+id 457
 epd r1nk1bqr/1pppp1pp/2n5/p4p1b/5P2/1N4B1/PPPPP1PP/RN1K1BQR w HAha - 2 9
 perft 1 25
 perft 2 824
@@ -4122,7 +4123,7 @@ perft 4 738366
 perft 5 20904119
 perft 6 716170771
 
-id 1
+id 458
 epd r1nkbqrb/p2pppp1/npp4p/8/4PP2/2N4P/PPPP2P1/R1NKBQRB w GAga - 0 9
 perft 1 31
 perft 2 548
@@ -4131,7 +4132,7 @@ perft 4 349633
 perft 5 11469548
 perft 6 255067638
 
-id 1
+id 459
 epd rbnnkqbr/ppppp2p/5p2/6p1/2P1B3/P6P/1P1PPPP1/R1NNKQBR w HAha - 1 9
 perft 1 31
 perft 2 809
@@ -4140,7 +4141,7 @@ perft 4 680747
 perft 5 21247414
 perft 6 606221516
 
-id 1
+id 460
 epd 1r1bkqbr/pppp1ppp/2nnp3/8/2P5/N4P2/PP1PP1PP/1RNBKQBR w Hh - 0 9
 perft 1 28
 perft 2 810
@@ -4149,7 +4150,7 @@ perft 4 694599
 perft 5 20188622
 perft 6 636748147
 
-id 1
+id 461
 epd rn1kqbbr/p1pppp1p/1p4p1/1n6/1P2P3/4Q2P/P1PP1PP1/RNNK1BBR w HAha - 1 9
 perft 1 39
 perft 2 848
@@ -4158,7 +4159,7 @@ perft 4 724426
 perft 5 25594662
 perft 6 659615710
 
-id 1
+id 462
 epd rn1kqrbb/pppppppp/8/8/2nP2P1/1P2P3/P1P2P1P/RNNKQRBB w FAfa - 1 9
 perft 1 29
 perft 2 766
@@ -4167,7 +4168,7 @@ perft 4 567971
 perft 5 16944425
 perft 6 456898648
 
-id 1
+id 463
 epd b1rnnkrq/bpppppp1/7p/8/1p6/2B5/PNPPPPPP/1BR1NKRQ w GCgc - 2 9
 perft 1 25
 perft 2 667
@@ -4176,7 +4177,7 @@ perft 4 472678
 perft 5 12865247
 perft 6 365621294
 
-id 1
+id 464
 epd brnb1krq/pppppppp/8/5P2/2P1n2P/8/PP1PP1P1/BRNBNKRQ w GBgb - 1 9
 perft 1 23
 perft 2 620
@@ -4185,7 +4186,7 @@ perft 4 402561
 perft 5 10776855
 perft 6 300125003
 
-id 1
+id 465
 epd b1nnkbrq/pr1pppp1/1p5p/2p5/P2N1P2/8/1PPPP1PP/BR1NKBRQ w GBg - 0 9
 perft 1 24
 perft 2 472
@@ -4194,7 +4195,7 @@ perft 4 267398
 perft 5 7370758
 perft 6 178605165
 
-id 1
+id 466
 epd br1nkrqb/p1p1p1pp/3n4/1p1p1p2/5N1P/4P3/PPPP1PP1/BR1NKRQB w FBfb - 0 9
 perft 1 24
 perft 2 775
@@ -4203,7 +4204,7 @@ perft 4 624309
 perft 5 16429837
 perft 6 539767605
 
-id 1
+id 467
 epd rbbnnkrq/p2pp1pp/2p5/5p2/1pPP1B2/P7/1P2PPPP/RB1NNKRQ w GAga - 0 9
 perft 1 34
 perft 2 921
@@ -4212,7 +4213,7 @@ perft 4 849933
 perft 5 28095833
 perft 6 806446436
 
-id 1
+id 468
 epd rnbbnkr1/1p1ppp1p/2p3p1/p7/2Pq4/1P1P4/P2BPPPP/RN1BNKRQ w GAga - 2 9
 perft 1 26
 perft 2 1139
@@ -4221,7 +4222,7 @@ perft 4 1204863
 perft 5 32825932
 perft 6 1281760240
 
-id 1
+id 469
 epd 1rbnkbrq/pppppp2/n5pp/2P5/P7/4N3/1P1PPPPP/RNB1KBRQ w GAg - 2 9
 perft 1 23
 perft 2 574
@@ -4230,7 +4231,7 @@ perft 4 391413
 perft 5 10203438
 perft 6 301874034
 
-id 1
+id 470
 epd 1nbnkr1b/rppppppq/p7/7p/1P5P/3P2P1/P1P1PP2/RNBNKRQB w FAf - 1 9
 perft 1 33
 perft 2 823
@@ -4239,7 +4240,7 @@ perft 4 724828
 perft 5 23266182
 perft 6 672294132
 
-id 1
+id 471
 epd rbn1bkrq/ppppp3/4n2p/5pp1/1PN5/2P5/P2PPPPP/RBN1BKRQ w GAga - 0 9
 perft 1 27
 perft 2 859
@@ -4248,7 +4249,7 @@ perft 4 796482
 perft 5 23075785
 perft 6 789152120
 
-id 1
+id 472
 epd r1nbbkrq/1ppp2pp/2n2p2/p3p3/5P2/1N4BP/PPPPP1P1/RN1B1KRQ w GAga - 0 9
 perft 1 25
 perft 2 774
@@ -4257,7 +4258,7 @@ perft 4 618805
 perft 5 16718577
 perft 6 515864053
 
-id 1
+id 473
 epd rnnkbbrq/1pppp1p1/5p2/7p/p6P/3N1P2/PPPPP1PQ/RN1KBBR1 w GAga - 0 9
 perft 1 29
 perft 2 673
@@ -4266,7 +4267,7 @@ perft 4 504715
 perft 5 15545590
 perft 6 416359581
 
-id 1
+id 474
 epd r1nkbrqb/pppp1p2/n3p1p1/7p/2P2P2/1P6/P2PPQPP/RNNKBR1B w FAfa - 0 9
 perft 1 27
 perft 2 722
@@ -4275,7 +4276,7 @@ perft 4 593762
 perft 5 18742426
 perft 6 537750982
 
-id 1
+id 475
 epd rbnnkr1q/1ppp2pp/p4p2/P2bp3/4P2P/8/1PPP1PP1/RBNNKRBQ w FAfa - 1 9
 perft 1 26
 perft 2 848
@@ -4284,7 +4285,7 @@ perft 4 741674
 perft 5 21591790
 perft 6 675163653
 
-id 1
+id 476
 epd rn1bkrb1/1ppppp1p/pn4p1/8/P2q3P/3P4/NPP1PPP1/RN1BKRBQ w FAfa - 1 9
 perft 1 22
 perft 2 803
@@ -4293,7 +4294,7 @@ perft 4 632920
 perft 5 15847763
 perft 6 536419559
 
-id 1
+id 477
 epd rn1krbbq/pppp1npp/4pp2/8/4P2P/3P2P1/PPP2P2/RNNKRBBQ w EAea - 1 9
 perft 1 29
 perft 2 810
@@ -4302,7 +4303,7 @@ perft 4 670500
 perft 5 20361517
 perft 6 575069358
 
-id 1
+id 478
 epd rnn1rqbb/ppkp1pp1/2p1p2p/2P5/8/3P1P2/PP2P1PP/RNNKRQBB w EA - 0 9
 perft 1 22
 perft 2 506
@@ -4311,7 +4312,7 @@ perft 4 292344
 perft 5 7287368
 perft 6 189865944
 
-id 1
+id 479
 epd bbqr1knr/pppppp1p/8/4n1p1/2P1P3/6P1/PPQP1P1P/BB1RNKNR w HDhd - 0 9
 perft 1 26
 perft 2 650
@@ -4320,7 +4321,7 @@ perft 4 481200
 perft 5 14301029
 perft 6 394943978
 
-id 1
+id 480
 epd bq1bnknr/pprppp1p/8/2p3p1/4PPP1/8/PPPP3P/BQRBNKNR w HCh - 0 9
 perft 1 24
 perft 2 548
@@ -4329,7 +4330,7 @@ perft 4 347611
 perft 5 9374021
 perft 6 250988458
 
-id 1
+id 481
 epd bqrnkb1r/1p2pppp/p1pp3n/5Q2/2P4P/5N2/PP1PPPP1/B1RNKB1R w HChc - 0 9
 perft 1 46
 perft 2 823
@@ -4338,7 +4339,7 @@ perft 4 673905
 perft 5 26130444
 perft 6 582880996
 
-id 1
+id 482
 epd bq1rknrb/pppppp1p/4n3/6p1/4P1P1/3P1P2/PPP4P/BQRNKNRB w GCg - 0 9
 perft 1 23
 perft 2 618
@@ -4347,7 +4348,7 @@ perft 4 419474
 perft 5 10606831
 perft 6 315124518
 
-id 1
+id 483
 epd q1brnknr/pp1pp1p1/8/2p2p1p/5b2/P4N2/1PPPP1PP/QBBRK1NR w hd - 0 9
 perft 1 22
 perft 2 675
@@ -4356,7 +4357,7 @@ perft 4 473994
 perft 5 12077228
 perft 6 368479752
 
-id 1
+id 484
 epd qrbbnknr/1p1ppp1p/p1p5/8/1P2P1p1/3P1B2/P1P2PPP/QRB1NKNR w HBhb - 0 9
 perft 1 32
 perft 2 722
@@ -4365,7 +4366,7 @@ perft 4 569905
 perft 5 19584539
 perft 6 484814878
 
-id 1
+id 485
 epd qrb1kbnr/p3pppp/2n5/1ppp4/7P/3P1P2/PPP1P1PR/QRBNKBN1 w Bhb - 0 9
 perft 1 26
 perft 2 831
@@ -4374,7 +4375,7 @@ perft 4 724505
 perft 5 20500804
 perft 6 662608969
 
-id 1
+id 486
 epd qrbnknrb/ppp1pp2/6p1/7p/PPNp4/8/2PPPPPP/QRB1KNRB w GBgb - 0 9
 perft 1 31
 perft 2 840
@@ -4383,7 +4384,7 @@ perft 4 742772
 perft 5 24422614
 perft 6 701363800
 
-id 1
+id 487
 epd qbrnbknr/pp1pp1pp/8/2p2p2/3Q4/PP6/2PPPPPP/1BRNBKNR w HChc - 0 9
 perft 1 38
 perft 2 1121
@@ -4392,7 +4393,7 @@ perft 4 1198438
 perft 5 41108769
 perft 6 1285503872
 
-id 1
+id 488
 epd qr1bbk1r/pppppp1p/1n6/5np1/4B3/1PP5/P2PPPPP/QRN1BKNR w HBhb - 0 9
 perft 1 25
 perft 2 694
@@ -4401,7 +4402,7 @@ perft 4 472950
 perft 5 12164609
 perft 6 345122090
 
-id 1
+id 489
 epd qrnkbbnr/1p1pp2p/p7/2p1Npp1/6P1/7P/PPPPPP2/QR1KBBNR w HBhb - 0 9
 perft 1 27
 perft 2 586
@@ -4410,7 +4411,7 @@ perft 4 393391
 perft 5 11409633
 perft 6 298054792
 
-id 1
+id 490
 epd qrnkbnrb/pp1p1p2/2p1p1pp/4N3/P4P2/8/1PPPP1PP/QR1KBNRB w GBgb - 0 9
 perft 1 32
 perft 2 645
@@ -4419,7 +4420,7 @@ perft 4 460319
 perft 5 15037464
 perft 6 358531599
 
-id 1
+id 491
 epd qbrnknbr/1pppppp1/p6p/8/1P6/3PP3/PQP2PPP/1BRNKNBR w HChc - 3 9
 perft 1 26
 perft 2 595
@@ -4428,7 +4429,7 @@ perft 4 415022
 perft 5 12214768
 perft 6 323518628
 
-id 1
+id 492
 epd qrnbk1br/1ppppp1p/p5p1/8/4Pn2/4K1P1/PPPP1P1P/QRNB1NBR w hb - 0 9
 perft 1 24
 perft 2 609
@@ -4437,7 +4438,7 @@ perft 4 359415
 perft 5 8538539
 perft 6 230364479
 
-id 1
+id 493
 epd qrnk1bbr/1pnp1ppp/p1p1p3/8/3Q4/1P1N3P/P1PPPPP1/1RNK1BBR w HBhb - 0 9
 perft 1 43
 perft 2 1106
@@ -4446,7 +4447,7 @@ perft 4 1123080
 perft 5 41695761
 perft 6 1113836402
 
-id 1
+id 494
 epd qrnknrb1/pppppp2/8/6pp/4P2P/3P1P2/PbP3P1/QRNKNRBB w FBfb - 0 9
 perft 1 24
 perft 2 658
@@ -4455,7 +4456,7 @@ perft 4 488373
 perft 5 14457245
 perft 6 400971226
 
-id 1
+id 495
 epd bbrqnrk1/ppp2ppp/7n/3pp3/8/P4N1N/1PPPPPPP/BBRQ1RK1 w - - 1 9
 perft 1 22
 perft 2 503
@@ -4464,7 +4465,7 @@ perft 4 310760
 perft 5 8080951
 perft 6 224960353
 
-id 1
+id 496
 epd brqbnk1r/1ppp1ppp/8/p3pn2/8/2PP1P2/PP2PKPP/BRQBN1NR w hb - 1 9
 perft 1 25
 perft 2 745
@@ -4473,7 +4474,7 @@ perft 4 570459
 perft 5 15520298
 perft 6 460840861
 
-id 1
+id 497
 epd brqnkbnr/pp2pp1p/3p4/2p5/5p2/3P3P/PPP1PPP1/B1RNKBNR w Hhb - 0 9
 perft 1 19
 perft 2 516
@@ -4482,7 +4483,7 @@ perft 4 312996
 perft 5 6995034
 perft 6 214340699
 
-id 1
+id 498
 epd brq1kn1b/1ppppprp/2n3p1/p7/P1N5/6P1/1PPPPP1P/BRQNK1RB w GBb - 2 9
 perft 1 29
 perft 2 557
@@ -4491,7 +4492,7 @@ perft 4 352277
 perft 5 10840256
 perft 6 249999654
 
-id 1
+id 499
 epd rbbq1k1r/ppp1pppp/7n/1n1p4/5P2/P2P4/1PPBP1PP/RB1QNKNR w HAha - 1 9
 perft 1 25
 perft 2 769
@@ -4500,7 +4501,7 @@ perft 4 638340
 perft 5 17438715
 perft 6 570893953
 
-id 1
+id 500
 epd r1bbnk1r/qpp1pppp/p6n/3p4/1P6/5N1P/P1PPPPP1/RQBBK1NR w ha - 0 9
 perft 1 23
 perft 2 728
@@ -4509,7 +4510,7 @@ perft 4 587364
 perft 5 16053564
 perft 6 529082811
 
-id 1
+id 501
 epd rqbnkbnr/1pp2p1p/3p4/p3p1p1/8/2P2P2/PP1PPNPP/RQBNKB1R w HAha - 0 9
 perft 1 26
 perft 2 772
@@ -4518,7 +4519,7 @@ perft 4 653704
 perft 5 19571559
 perft 6 593915677
 
-id 1
+id 502
 epd r1bnknrb/pqppp1p1/1p5p/5p2/7P/3P2N1/PPP1PPP1/RQBNK1RB w GAga - 2 9
 perft 1 27
 perft 2 748
@@ -4527,7 +4528,7 @@ perft 4 597105
 perft 5 16324542
 perft 6 506453626
 
-id 1
+id 503
 epd rbqnbknr/pp1pppp1/8/2p5/3P3p/5N1P/PPP1PPPR/RBQNBK2 w Aha - 0 9
 perft 1 30
 perft 2 859
@@ -4536,7 +4537,7 @@ perft 4 819631
 perft 5 26363334
 perft 6 842796987
 
-id 1
+id 504
 epd rqnbbrk1/ppppppp1/8/5n1p/3P3P/2B3P1/PPP1PP2/RQNB1KNR w HA - 0 9
 perft 1 22
 perft 2 505
@@ -4545,7 +4546,7 @@ perft 4 283464
 perft 5 7055215
 perft 6 186760784
 
-id 1
+id 505
 epd rqnkbbnr/pp2p1p1/8/2pp1p1p/3PPP2/8/PPP1N1PP/RQNKBB1R w HAha - 0 9
 perft 1 28
 perft 2 832
@@ -4554,7 +4555,7 @@ perft 4 722857
 perft 5 20429246
 perft 6 663183060
 
-id 1
+id 506
 epd rqnkbnr1/pppp2bp/6p1/4pp2/1P2P3/3NN3/P1PP1PPP/RQ1KB1RB w GAga - 0 9
 perft 1 28
 perft 2 641
@@ -4563,7 +4564,7 @@ perft 4 459993
 perft 5 14038570
 perft 6 364210162
 
-id 1
+id 507
 epd rbq2kbr/pppppppp/2n5/P7/3P1n2/2P5/1P2PPPP/RBQNKNBR w HA - 1 9
 perft 1 31
 perft 2 889
@@ -4572,7 +4573,7 @@ perft 4 766181
 perft 5 24299415
 perft 6 692180754
 
-id 1
+id 508
 epd rq1bkn1r/ppppp2p/3n4/5pp1/2b3P1/1N1P1P2/PPP1P2P/RQ1BKNBR w HAha - 1 9
 perft 1 28
 perft 2 810
@@ -4581,7 +4582,7 @@ perft 4 657520
 perft 5 18719949
 perft 6 556282676
 
-id 1
+id 509
 epd r1nknbbr/p2ppp1p/1pp3p1/8/1P6/4P3/P1PPNPPq/R1QKNBBR w HAha - 0 9
 perft 1 24
 perft 2 797
@@ -4590,7 +4591,7 @@ perft 4 719069
 perft 5 21862776
 perft 6 716521139
 
-id 1
+id 510
 epd rqnknrbb/ppp1p3/5ppp/2Np4/2P5/4P3/PP1P1PPP/RQNK1RBB w FAfa - 0 9
 perft 1 34
 perft 2 686
@@ -4599,7 +4600,7 @@ perft 4 515541
 perft 5 17664543
 perft 6 423574794
 
-id 1
+id 511
 epd 1brnqknr/2p1pppp/p2p4/1P6/6P1/4Nb2/PP1PPP1P/BBR1QKNR w HChc - 1 9
 perft 1 34
 perft 2 1019
@@ -4608,7 +4609,7 @@ perft 4 1003103
 perft 5 33322477
 perft 6 1043293394
 
-id 1
+id 512
 epd brn1qknr/1p1pppp1/pb5p/Q1p5/3P3P/8/PPP1PPPR/BRNB1KN1 w Bhb - 2 9
 perft 1 32
 perft 2 642
@@ -4617,7 +4618,7 @@ perft 4 464895
 perft 5 15454749
 perft 6 371861782
 
-id 1
+id 513
 epd brnqkbnr/pppppp2/8/6pp/6P1/P2P1P2/1PP1P2P/BRNQKBNR w HBhb - 0 9
 perft 1 20
 perft 2 441
@@ -4626,7 +4627,7 @@ perft 4 240220
 perft 5 5770284
 perft 6 153051835
 
-id 1
+id 514
 epd 2nqknrb/1rpppppp/5B2/pp6/1PP1b3/3P4/P3PPPP/1RNQKNRB w GBg - 1 9
 perft 1 35
 perft 2 1042
@@ -4635,7 +4636,7 @@ perft 4 1101159
 perft 5 38505058
 perft 6 1202668717
 
-id 1
+id 515
 epd rb1nqknr/1pp1pppp/8/3p4/p2P4/6PN/PPPQPP1P/RBBN1K1R w HAha - 0 9
 perft 1 29
 perft 2 692
@@ -4644,7 +4645,7 @@ perft 4 555018
 perft 5 17820605
 perft 6 497251206
 
-id 1
+id 516
 epd rnbbqknr/pppp4/5p2/4p1pp/P7/2N2PP1/1PPPP2P/R1BBQKNR w HAha - 0 9
 perft 1 23
 perft 2 595
@@ -4653,7 +4654,7 @@ perft 4 415772
 perft 5 10881112
 perft 6 329010121
 
-id 1
+id 517
 epd rn1qkbnr/p1p1pp1p/bp4p1/3p4/1P6/4P3/P1PP1PPP/RNBQKBNR w HAha - 0 9
 perft 1 30
 perft 2 794
@@ -4662,7 +4663,7 @@ perft 4 690811
 perft 5 21657601
 perft 6 647745807
 
-id 1
+id 518
 epd r1bqk1rb/pppnpppp/5n2/3p4/2P3PP/2N5/PP1PPP2/R1BQKNRB w GAga - 1 9
 perft 1 32
 perft 2 821
@@ -4671,7 +4672,7 @@ perft 4 733155
 perft 5 24923473
 perft 6 710765657
 
-id 1
+id 519
 epd rbnqbknr/1p1ppp1p/6p1/p1p5/7P/3P4/PPP1PPP1/RBNQBKNR w HAha - 0 9
 perft 1 24
 perft 2 720
@@ -4680,7 +4681,7 @@ perft 4 575027
 perft 5 15992882
 perft 6 501093456
 
-id 1
+id 520
 epd r1qbbk1r/pp1ppppp/n1p5/5n2/B1P3P1/8/PP1PPP1P/RNQ1BKNR w HAha - 0 9
 perft 1 27
 perft 2 831
@@ -4689,7 +4690,7 @@ perft 4 698986
 perft 5 19948650
 perft 6 637973209
 
-id 1
+id 521
 epd rnqkbb1r/p1pppppp/8/8/1p4n1/PP4PP/2PPPP2/RNQKBBNR w HAha - 0 9
 perft 1 18
 perft 2 463
@@ -4698,7 +4699,7 @@ perft 4 256152
 perft 5 6065231
 perft 6 172734380
 
-id 1
+id 522
 epd rnqk1nrb/pppbpp2/7p/3p2p1/4B3/2N1N1P1/PPPPPP1P/R1QKB1R1 w GAga - 0 9
 perft 1 34
 perft 2 1171
@@ -4707,7 +4708,7 @@ perft 4 1318217
 perft 5 42109356
 perft 6 1465473753
 
-id 1
+id 523
 epd rbnqknbr/1pp1ppp1/3p4/7p/p2P2PP/2P5/PP2PP2/RBNQKNBR w HAha - 0 9
 perft 1 32
 perft 2 867
@@ -4716,7 +4717,7 @@ perft 4 798722
 perft 5 26632459
 perft 6 781067145
 
-id 1
+id 524
 epd rn1bknbr/pq2pppp/1p6/2pp4/P7/1P1P4/2PNPPPP/RNQBK1BR w HAha - 0 9
 perft 1 24
 perft 2 627
@@ -4725,7 +4726,7 @@ perft 4 462942
 perft 5 13200921
 perft 6 385193532
 
-id 1
+id 525
 epd r1qk1bbr/ppp1pp1p/2np1n2/6p1/2PP4/3BP3/PP3PPP/RNQKN1BR w HAha - 2 9
 perft 1 31
 perft 2 992
@@ -4734,7 +4735,7 @@ perft 4 986631
 perft 5 30397368
 perft 6 1011631987
 
-id 1
+id 526
 epd r1qknrbb/pppp1p2/2n3p1/4p2p/8/QPP5/P1NPPPPP/RN1K1RBB w FAfa - 2 9
 perft 1 30
 perft 2 702
@@ -4743,7 +4744,7 @@ perft 4 532939
 perft 5 16813114
 perft 6 438096194
 
-id 1
+id 527
 epd bbkr1qnr/2pppppp/2n5/pp6/8/PPN5/1BPPPPPP/1BR1KQNR w HC - 2 9
 perft 1 25
 perft 2 573
@@ -4752,7 +4753,7 @@ perft 4 380910
 perft 5 10554668
 perft 6 283975400
 
-id 1
+id 528
 epd 1rnbkqnr/1bpppppp/1p6/7P/p2P4/5P2/PPP1P1P1/BRNBKQNR w HBhb - 0 9
 perft 1 21
 perft 2 503
@@ -4761,7 +4762,7 @@ perft 4 301084
 perft 5 7679979
 perft 6 207799378
 
-id 1
+id 529
 epd brnkqbnr/2p1pppp/1p6/3p4/1pP5/P6P/3PPPP1/BRNKQBNR w HBhb - 0 9
 perft 1 28
 perft 2 743
@@ -4770,7 +4771,7 @@ perft 4 587192
 perft 5 17354516
 perft 6 507176753
 
-id 1
+id 530
 epd br1kqnrb/npp1pppp/8/3p4/p4N2/PP6/2PPPPPP/BR1KQNRB w GBgb - 0 9
 perft 1 31
 perft 2 808
@@ -4779,7 +4780,7 @@ perft 4 698475
 perft 5 22376575
 perft 6 640362920
 
-id 1
+id 531
 epd rbbnkq1r/pppppp1p/7n/6p1/P5P1/2P2N2/1P1PPP1P/RBBNKQ1R w HAha - 1 9
 perft 1 29
 perft 2 580
@@ -4788,7 +4789,7 @@ perft 4 404831
 perft 5 12730970
 perft 6 325226128
 
-id 1
+id 532
 epd rnbbk1nr/pp2qppp/2ppp3/8/3P4/P1N4N/1PP1PPPP/R1BBKQ1R w HAha - 0 9
 perft 1 29
 perft 2 838
@@ -4797,7 +4798,7 @@ perft 4 721884
 perft 5 21100580
 perft 6 646624429
 
-id 1
+id 533
 epd rnbk1b1r/ppppn1pp/4pp2/7q/7P/P5PB/1PPPPP2/RNBKQ1NR w HAha - 3 9
 perft 1 20
 perft 2 729
@@ -4806,7 +4807,7 @@ perft 4 576199
 perft 5 14507076
 perft 6 498621813
 
-id 1
+id 534
 epd r2kqnrb/pbppppp1/np5p/8/4Q1P1/3P4/PPP1PP1P/RNBK1NRB w GAga - 2 9
 perft 1 47
 perft 2 1219
@@ -4815,7 +4816,7 @@ perft 4 1486353
 perft 5 65239153
 perft 6 1834391369
 
-id 1
+id 535
 epd rbnkbq1r/p1p2ppp/1p2pn2/3p4/P3P3/3P4/1PP1KPPP/RBN1BQNR w ha - 2 9
 perft 1 29
 perft 2 923
@@ -4824,7 +4825,7 @@ perft 4 883866
 perft 5 26202752
 perft 6 868565895
 
-id 1
+id 536
 epd rk1bb1nr/ppppqppp/n7/1N2p3/6P1/7N/PPPPPP1P/R1KBBQ1R w HA - 6 9
 perft 1 27
 perft 2 703
@@ -4833,7 +4834,7 @@ perft 4 559525
 perft 5 16049807
 perft 6 492966455
 
-id 1
+id 537
 epd rnkqbbnr/p1ppp2p/1p4p1/8/1B3p1P/2NP4/PPP1PPP1/R1KQ1BNR w HAha - 0 9
 perft 1 29
 perft 2 610
@@ -4842,7 +4843,7 @@ perft 4 438277
 perft 5 14020041
 perft 6 355083962
 
-id 1
+id 538
 epd rnkqb1rb/pp1p1ppp/4p3/2P3n1/8/1PP5/P3PPPP/RNKQBNRB w GAga - 0 9
 perft 1 29
 perft 2 675
@@ -4851,7 +4852,7 @@ perft 4 535821
 perft 5 17000613
 perft 6 476598337
 
-id 1
+id 539
 epd rb1kqnbr/pp1pp1p1/1np2p2/7p/P1P3PP/8/1P1PPP2/RBNKQNBR w HAha - 0 9
 perft 1 31
 perft 2 1077
@@ -4860,7 +4861,7 @@ perft 4 1183381
 perft 5 37415304
 perft 6 1328374620
 
-id 1
+id 540
 epd rnkbq1br/ppp2ppp/3p4/Q3p1n1/5P2/3P2P1/PPP1P2P/RNKB1NBR w HAha - 0 9
 perft 1 41
 perft 2 1201
@@ -4869,7 +4870,7 @@ perft 4 1420367
 perft 5 52991625
 perft 6 1675608008
 
-id 1
+id 541
 epd rn1qnbbr/pp2pppp/2ppk3/8/2PP4/3Q1N2/PP2PPPP/RNK2BBR w HA - 1 9
 perft 1 34
 perft 2 666
@@ -4878,7 +4879,7 @@ perft 4 472299
 perft 5 15860369
 perft 6 353831792
 
-id 1
+id 542
 epd rnkqnr1b/ppppp1pp/5p2/8/Q1P2P2/8/PP1P2PP/RbK1NRBB w FAfa - 0 9
 perft 1 36
 perft 2 876
@@ -4887,7 +4888,7 @@ perft 4 788580
 perft 5 29022529
 perft 6 736717252
 
-id 1
+id 543
 epd bbrn1nqr/ppp1k1pp/5p2/3pp3/7P/3PN3/PPP1PPP1/BBRK1NQR w - - 1 9
 perft 1 24
 perft 2 583
@@ -4896,7 +4897,7 @@ perft 4 383532
 perft 5 10522064
 perft 6 280707118
 
-id 1
+id 544
 epd brnbkn1r/1pppp1p1/4q3/p4p1p/7P/1N3P2/PPPPP1PQ/BR1BKN1R w HBhb - 2 9
 perft 1 27
 perft 2 935
@@ -4905,7 +4906,7 @@ perft 4 885699
 perft 5 26000648
 perft 6 873063158
 
-id 1
+id 545
 epd br1knbqr/pp2p1pp/1n6/2pp1p2/6P1/2P4B/PP1PPPQP/BRNKN2R w HBhb - 0 9
 perft 1 27
 perft 2 681
@@ -4914,7 +4915,7 @@ perft 4 510687
 perft 5 14954779
 perft 6 415624943
 
-id 1
+id 546
 epd brnk1qrb/p1ppppp1/1p5p/8/P3n3/1N4P1/1PPPPPRP/BR1KNQ1B w Bgb - 0 9
 perft 1 22
 perft 2 638
@@ -4923,7 +4924,7 @@ perft 4 412346
 perft 5 9760752
 perft 6 293499724
 
-id 1
+id 547
 epd rbbnknqr/pppp3p/5pp1/8/1P1pP3/7P/P1P2PP1/RBBNKNQR w HAha - 0 9
 perft 1 29
 perft 2 756
@@ -4932,7 +4933,7 @@ perft 4 614074
 perft 5 17602252
 perft 6 528140595
 
-id 1
+id 548
 epd 1nbbknqr/rpp1ppp1/1Q1p3p/p7/2P2PP1/8/PP1PP2P/RNBBKN1R w HAh - 2 9
 perft 1 37
 perft 2 977
@@ -4941,7 +4942,7 @@ perft 4 944867
 perft 5 33695089
 perft 6 940198007
 
-id 1
+id 549
 epd rnb2bqr/ppkpppp1/3n3p/2p5/6PP/2N2P2/PPPPP3/R1BKNBQR w HA - 2 9
 perft 1 30
 perft 2 647
@@ -4950,7 +4951,7 @@ perft 4 467780
 perft 5 15115531
 perft 6 369257622
 
-id 1
+id 550
 epd rn1k1qrb/p1pppppp/bp6/8/4n3/P4BPP/1PPPPP2/RNBKNQR1 w GAga - 2 9
 perft 1 22
 perft 2 670
@@ -4959,7 +4960,7 @@ perft 4 451517
 perft 5 11199653
 perft 6 339919682
 
-id 1
+id 551
 epd rb2bnqr/nppkpppp/3p4/p7/1P6/P2N2P1/2PPPP1P/RB1KBNQR w HA - 3 9
 perft 1 22
 perft 2 479
@@ -4968,7 +4969,7 @@ perft 4 264739
 perft 5 6831555
 perft 6 167329117
 
-id 1
+id 552
 epd r1kbb1qr/2pppppp/np2n3/p7/2P3P1/8/PP1PPPQP/RNKBBN1R w HAha - 1 9
 perft 1 32
 perft 2 723
@@ -4977,7 +4978,7 @@ perft 4 581832
 perft 5 19472074
 perft 6 504622114
 
-id 1
+id 553
 epd rnknbb1r/p1ppp1pp/8/1p1P1p1q/8/P1P5/1P2PPPP/RNKNBBQR w HAha - 1 9
 perft 1 19
 perft 2 607
@@ -4986,7 +4987,7 @@ perft 4 417451
 perft 5 9753617
 perft 6 325177085
 
-id 1
+id 554
 epd rnkn1qrb/pp1bp1pp/2p5/1N1p1p2/8/2P5/PPKPPPPP/R2NBQRB w ga - 2 9
 perft 1 27
 perft 2 533
@@ -4995,7 +4996,7 @@ perft 4 330747
 perft 5 9206957
 perft 6 232664675
 
-id 1
+id 555
 epd r1nknqbr/pp2p1pp/2p2p2/3p4/6P1/PP1P4/2P1PP1b/RBNKNQBR w HAha - 0 9
 perft 1 20
 perft 2 582
@@ -5004,7 +5005,7 @@ perft 4 409166
 perft 5 10708639
 perft 6 326565393
 
-id 1
+id 556
 epd rnkb1qbr/p1pp1p1p/1p2pn2/1Q4p1/4P3/N4P2/PPPP2PP/R1KBN1BR w HAha - 0 9
 perft 1 40
 perft 2 1038
@@ -5013,7 +5014,7 @@ perft 4 1051441
 perft 5 39145902
 perft 6 1079612614
 
-id 1
+id 557
 epd rn2qbbr/1pkppp1p/p3n1p1/8/8/2P2P2/PP1PP1PP/RNKN1BBR w HA - 0 9
 perft 1 24
 perft 2 605
@@ -5022,7 +5023,7 @@ perft 4 385964
 perft 5 9687507
 perft 6 260874068
 
-id 1
+id 558
 epd rn1nqrbb/p1kppp1p/8/1pp3p1/1P6/2N1P3/P1PP1PPP/RK1NQRBB w - - 0 9
 perft 1 21
 perft 2 540
@@ -5031,7 +5032,7 @@ perft 4 337997
 perft 5 8436136
 perft 6 237525904
 
-id 1
+id 559
 epd bbrnknrq/1pp3pp/p2p1p2/4p3/P7/1P2N3/2PPPPPP/BBRN1RKQ w gc - 0 9
 perft 1 24
 perft 2 527
@@ -5040,7 +5041,7 @@ perft 4 326175
 perft 5 9139962
 perft 6 226253685
 
-id 1
+id 560
 epd brnb1nrq/pppp1kpp/4p3/8/5p1P/P1P3P1/1P1PPP2/BRNBKNRQ w GB - 1 9
 perft 1 29
 perft 2 773
@@ -5049,7 +5050,7 @@ perft 4 638768
 perft 5 20503775
 perft 6 560338709
 
-id 1
+id 561
 epd br1k1brq/ppppp2p/1n1n1pp1/8/P1P5/3P2P1/1P2PP1P/BRNKNBRQ w GBgb - 0 9
 perft 1 28
 perft 2 811
@@ -5058,7 +5059,7 @@ perft 4 664880
 perft 5 19913758
 perft 6 565143976
 
-id 1
+id 562
 epd 1r1knrqb/n1pppppp/p1b5/1p6/8/3N1P2/PPPPP1PP/BRNK1RQB w fb - 3 9
 perft 1 29
 perft 2 753
@@ -5067,7 +5068,7 @@ perft 4 620019
 perft 5 20044474
 perft 6 558383603
 
-id 1
+id 563
 epd rbbnk1rq/pppppppp/8/3Pn3/8/4P1P1/PPP2P1P/RBBNKNRQ w GAga - 1 9
 perft 1 22
 perft 2 551
@@ -5076,7 +5077,7 @@ perft 4 324608
 perft 5 8204171
 perft 6 217689974
 
-id 1
+id 564
 epd rnbbk1rq/2pppp1p/p3n1p1/1p6/P3N3/8/1PPPPPPP/RNBB1KRQ w ga - 0 9
 perft 1 26
 perft 2 742
@@ -5085,7 +5086,7 @@ perft 4 599527
 perft 5 16787080
 perft 6 525678162
 
-id 1
+id 565
 epd rnbkn1rq/ppppppb1/6p1/7p/2B2P2/1P2P3/P1PP2PP/RNBKN1RQ w GAga - 1 9
 perft 1 28
 perft 2 799
@@ -5094,7 +5095,7 @@ perft 4 689436
 perft 5 20755098
 perft 6 639632905
 
-id 1
+id 566
 epd rn1knrqb/p2pppp1/b1p5/1p5p/2P2P2/1P6/P2PP1PP/RNBKNRQB w FAfa - 1 9
 perft 1 30
 perft 2 579
@@ -5103,7 +5104,7 @@ perft 4 397545
 perft 5 13257198
 perft 6 311282465
 
-id 1
+id 567
 epd rbnkbnrq/pp2p1Np/2p2p2/8/3p4/8/PPPPPPPP/RBNKBR1Q w Aga - 0 9
 perft 1 23
 perft 2 670
@@ -5112,7 +5113,7 @@ perft 4 501883
 perft 5 13012378
 perft 6 411860744
 
-id 1
+id 568
 epd rk1bbnrq/ppp1pppp/n7/3p4/5P2/3P2NP/PPP1P1P1/RNKBB1RQ w GA - 0 9
 perft 1 26
 perft 2 597
@@ -5121,7 +5122,7 @@ perft 4 402506
 perft 5 11269462
 perft 6 296701249
 
-id 1
+id 569
 epd r1knbbrq/pppp2p1/2n1p2p/5p2/4P3/P1PP4/1P3PPP/RNKNBBRQ w GAga - 1 9
 perft 1 20
 perft 2 596
@@ -5130,7 +5131,7 @@ perft 4 399069
 perft 5 9416862
 perft 6 293659781
 
-id 1
+id 570
 epd rnknbrqb/p1p1pp1p/3p4/1p1N2p1/8/N7/PPPPPPPP/1RK1BRQB w Ffa - 0 9
 perft 1 26
 perft 2 724
@@ -5139,7 +5140,7 @@ perft 4 552040
 perft 5 15257204
 perft 6 461293885
 
-id 1
+id 571
 epd rbnknrb1/1p1ppp1p/p1p3p1/8/1P3P2/1R6/PqPPP1PP/RBNKN1BQ w Afa - 0 9
 perft 1 31
 perft 2 1183
@@ -5148,7 +5149,7 @@ perft 4 1289502
 perft 5 38722152
 perft 6 1421492227
 
-id 1
+id 572
 epd rnkbnrbq/2p1ppp1/p7/1p1p3p/3P4/1P4P1/P1P1PP1P/RNKBNRBQ w FAfa - 0 9
 perft 1 24
 perft 2 506
@@ -5157,7 +5158,7 @@ perft 4 301464
 perft 5 8086100
 perft 6 207129256
 
-id 1
+id 573
 epd r1knrbbq/pp1ppppp/2p1n3/8/2P3P1/P7/1PKPPP1P/RN1NRBBQ w ea - 0 9
 perft 1 28
 perft 2 570
@@ -5166,7 +5167,7 @@ perft 4 352471
 perft 5 10278695
 perft 6 242592363
 
-id 1
+id 574
 epd rnknrq1b/ppp1p1p1/4b3/3p1p1p/6P1/P4P2/1PPPPQ1P/RNKNR1BB w EAea - 2 9
 perft 1 30
 perft 2 739
@@ -5175,7 +5176,7 @@ perft 4 594962
 perft 5 19252739
 perft 6 521629794
 
-id 1
+id 575
 epd bbqr1krn/pppp1p1p/5n2/4p1p1/3P4/P3QP2/1PP1P1PP/BB1RNKRN w GDgd - 0 9
 perft 1 31
 perft 2 799
@@ -5184,7 +5185,7 @@ perft 4 674913
 perft 5 22172123
 perft 6 609277274
 
-id 1
+id 576
 epd bq1b1krn/pp1ppppp/3n4/2r5/3p3N/6N1/PPP1PPPP/BQRB1KR1 w GCg - 2 9
 perft 1 21
 perft 2 798
@@ -5193,7 +5194,7 @@ perft 4 688429
 perft 5 17546069
 perft 6 647165916
 
-id 1
+id 577
 epd bqrnkbrn/2pp1pp1/p7/1p2p2p/1P6/4N3/P1PPPPPP/BQR1KBRN w GCgc - 0 9
 perft 1 27
 perft 2 783
@@ -5202,7 +5203,7 @@ perft 4 670798
 perft 5 20059741
 perft 6 624462073
 
-id 1
+id 578
 epd bqr1krnb/1np1pppp/8/pp1p4/8/2P2N2/PP1PPPPP/BQRNKR1B w FCfc - 0 9
 perft 1 28
 perft 2 636
@@ -5211,7 +5212,7 @@ perft 4 461104
 perft 5 14237097
 perft 6 372181570
 
-id 1
+id 579
 epd qbb1rkrn/1ppppppp/p7/7n/8/P2P4/1PP1PPPP/QBBRNKRN w Gg - 0 9
 perft 1 25
 perft 2 547
@@ -5220,7 +5221,7 @@ perft 4 332918
 perft 5 8849383
 perft 6 229112926
 
-id 1
+id 580
 epd 1rbbnkrn/p1p1pp1p/2q5/1p1p2p1/8/2P3P1/PP1PPP1P/QRBBNKRN w GBgb - 2 9
 perft 1 24
 perft 2 1010
@@ -5229,7 +5230,7 @@ perft 4 983770
 perft 5 24328258
 perft 6 961371180
 
-id 1
+id 581
 epd qrb1kbrn/ppp1p2p/4npp1/3p4/8/1PP4P/PR1PPPP1/Q1BNKBRN w Ggb - 1 9
 perft 1 18
 perft 2 451
@@ -5238,7 +5239,7 @@ perft 4 247310
 perft 5 5568106
 perft 6 155744022
 
-id 1
+id 582
 epd qr2krnb/p1p1pppp/b1np4/1p6/3NP3/7P/PPPP1PP1/QRBNKR1B w FBfb - 2 9
 perft 1 25
 perft 2 667
@@ -5247,7 +5248,7 @@ perft 4 476030
 perft 5 12458875
 perft 6 361495148
 
-id 1
+id 583
 epd qbrnbkrn/ppp3pp/3p4/5p2/2P1pP2/6PP/PP1PP3/QBRNBKRN w GCgc - 0 9
 perft 1 24
 perft 2 650
@@ -5256,7 +5257,7 @@ perft 4 445263
 perft 5 12187382
 perft 6 326834539
 
-id 1
+id 584
 epd qrnb1krn/ppp1p1pp/5p2/2Np4/b2P4/2P5/PP2PPPP/QR1BBKRN w GBgb - 0 9
 perft 1 27
 perft 2 641
@@ -5265,7 +5266,7 @@ perft 4 432041
 perft 5 12103076
 perft 6 310695797
 
-id 1
+id 585
 epd qrnkbbrn/pp2pp2/8/2pp2pp/6PP/3P4/PPPKPP2/QRN1BBRN w gb - 0 9
 perft 1 22
 perft 2 554
@@ -5274,7 +5275,7 @@ perft 4 357404
 perft 5 9014737
 perft 6 258925091
 
-id 1
+id 586
 epd qrnkbrnb/p1p1ppp1/1p6/3p4/3P3p/5N1P/PPP1PPP1/QRNKBR1B w FBfb - 0 9
 perft 1 24
 perft 2 529
@@ -5283,7 +5284,7 @@ perft 4 318722
 perft 5 8295874
 perft 6 213856651
 
-id 1
+id 587
 epd qbr1krbn/1pppp1pp/p7/5pn1/2PP4/8/PPB1PPPP/Q1RNKRBN w FCfc - 0 9
 perft 1 26
 perft 2 831
@@ -5292,7 +5293,7 @@ perft 4 696830
 perft 5 18961456
 perft 6 621884383
 
-id 1
+id 588
 epd 1rnbkrbn/1qp1pppp/3p4/pp6/4P3/1NP4P/PP1P1PP1/QR1BKRBN w FBfb - 0 9
 perft 1 24
 perft 2 597
@@ -5301,7 +5302,7 @@ perft 4 404761
 perft 5 10832084
 perft 6 307793179
 
-id 1
+id 589
 epd q1rkrbbn/ppp1pppp/8/3p4/1PnP4/P7/1RP1PPPP/Q1NKRBBN w Ee - 1 9
 perft 1 20
 perft 2 520
@@ -5310,7 +5311,7 @@ perft 4 278067
 perft 5 6452205
 perft 6 170268300
 
-id 1
+id 590
 epd qrnkrn1b/ppppp1pp/4b3/7P/6p1/P7/1PPPPP2/QRNKRNBB w EBeb - 0 9
 perft 1 26
 perft 2 566
@@ -5319,7 +5320,7 @@ perft 4 381312
 perft 5 10940750
 perft 6 287987207
 
-id 1
+id 591
 epd bbr1nkrn/ppp1pppp/3q4/3p4/8/P7/1PPPPPPP/BBRQNRKN w gc - 5 9
 perft 1 19
 perft 2 661
@@ -5328,7 +5329,7 @@ perft 4 460396
 perft 5 10870247
 perft 6 356399665
 
-id 1
+id 592
 epd brqbnkrn/pp1pp2p/5pp1/2p5/4P3/P2P1N2/1PP2PPP/BRQB1KRN w GBgb - 0 9
 perft 1 27
 perft 2 679
@@ -5337,7 +5338,7 @@ perft 4 527306
 perft 5 16391730
 perft 6 455940859
 
-id 1
+id 593
 epd 2qnkbrn/p1pppppp/8/1r6/1p2bP2/7N/PPPPP1PP/BR1QKBRN w GBg - 4 9
 perft 1 18
 perft 2 774
@@ -5346,7 +5347,7 @@ perft 4 635461
 perft 5 14371755
 perft 6 559579332
 
-id 1
+id 594
 epd r1qnkr1b/p1pppppp/7n/1p6/8/1P3b1N/PRPPPPPP/B1QNK1RB w f - 5 9
 perft 1 21
 perft 2 677
@@ -5355,7 +5356,7 @@ perft 4 501520
 perft 5 12463801
 perft 6 410795298
 
-id 1
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 epd rbbqn1rn/pppp1pp1/3k4/4p2Q/2PPP3/8/PP3PPP/RBB1NKRN w GA - 1 9
 perft 1 40
 perft 2 742
@@ -5364,7 +5365,7 @@ perft 4 579833
 perft 5 21852196
 perft 6 471452088
 
-id 1
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 epd rqbbnkrn/3pppp1/p1p4p/1p6/5P2/P2N4/1PPPP1PP/RQBBK1RN w ga - 0 9
 perft 1 23
 perft 2 665
@@ -5373,7 +5374,7 @@ perft 4 492544
 perft 5 12794736
 perft 6 396640086
 
-id 1
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 epd r2nkbrn/pp2pppp/8/2ppqb2/2P3P1/5P2/PP1PPN1P/RQB1KBRN w GAga - 3 9
 perft 1 28
 perft 2 1108
@@ -5382,7 +5383,7 @@ perft 4 1194581
 perft 5 34780853
 perft 6 1292405738
 
-id 1
+id 598
 epd rqbnk1nb/p1pppr1p/5p2/1p4p1/1PP1P3/8/P2P1PPP/RQBNKRNB w FAa - 1 9
 perft 1 26
 perft 2 650
@@ -5391,7 +5392,7 @@ perft 4 491403
 perft 5 14565370
 perft 6 416833400
 
-id 1
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 epd rbqnb1rn/p1pp1kpp/1p2pp2/8/4P2P/P5P1/1PPP1P2/RBQNBKRN w GA - 0 9
 perft 1 20
 perft 2 437
@@ -5400,7 +5401,7 @@ perft 4 222154
 perft 5 5282124
 perft 6 132309824
 
-id 1
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 epd rqnbbkrn/p1p1pppp/3p4/1p5B/8/1P1NP3/P1PP1PPP/RQ2BKRN w GAga - 0 9
 perft 1 30
 perft 2 606
@@ -5409,7 +5410,7 @@ perft 4 422491
 perft 5 12989786
 perft 6 326601372
 
-id 1
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 epd rqnkbbr1/ppppp1pp/5p2/7n/8/2PNP2P/PP1P1PP1/RQ1KBBRN w GAga - 1 9
 perft 1 23
 perft 2 482
@@ -5418,7 +5419,7 @@ perft 4 297869
 perft 5 8430874
 perft 6 217797292
 
-id 1
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 epd r1nkbrnb/2ppppp1/1q6/pp5p/1P6/P3P3/2PPKPPP/RQN1BRNB w fa - 2 9
 perft 1 25
 perft 2 827
@@ -5427,7 +5428,7 @@ perft 4 701071
 perft 5 19290675
 perft 6 632892337
 
-id 1
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 epd rbqnkrbn/p1ppppp1/7p/1p6/7P/2N1P3/PPPP1PPB/RBQ1KR1N w FAfa - 1 9
 perft 1 30
 perft 2 627
@@ -5436,7 +5437,7 @@ perft 4 440217
 perft 5 12976682
 perft 6 337377291
 
-id 1
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 epd r1nbkrbn/p1qp1ppp/8/1pp1p3/2P1P3/6P1/PP1PBP1P/RQN1KRBN w FAfa - 2 9
 perft 1 22
 perft 2 616
@@ -5445,7 +5446,7 @@ perft 4 431199
 perft 5 10850952
 perft 6 335943324
 
-id 1
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 epd rqnkr1bn/ppp1ppb1/3p2pp/8/P7/2P2P2/1PKPP1PP/RQN1RBBN w ea - 1 9
 perft 1 31
 perft 2 679
@@ -5454,7 +5455,7 @@ perft 4 493500
 perft 5 15661072
 perft 6 379844460
 
-id 1
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 epd r2krnbb/qppp1ppp/1n6/p3p3/PP6/4N3/N1PPPPPP/RQ1KR1BB w EAea - 4 9
 perft 1 24
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@@ -5463,7 +5464,7 @@ perft 4 487028
 perft 5 13837270
 perft 6 416239106
 
-id 1
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 epd bbr1qk1n/1ppppp1p/2n5/p7/P7/1P2P3/2PP1PrP/1BRNQKRN w GCc - 0 9
 perft 1 18
 perft 2 520
@@ -5472,7 +5473,7 @@ perft 4 304462
 perft 5 7215306
 perft 6 207612575
 
-id 1
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 epd brnbq1rn/2ppppkp/p5p1/1p6/8/1BP3P1/PP1PPP1P/BRN1QRKN w - - 0 9
 perft 1 21
 perft 2 625
@@ -5481,7 +5482,7 @@ perft 4 419667
 perft 5 9929336
 perft 6 300902534
 
-id 1
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 epd brn1kbrn/pp2p1pp/3p4/q1p2p2/2P4P/6P1/PP1PPP2/BRNQKBRN w GBgb - 1 9
 perft 1 18
 perft 2 477
@@ -5490,7 +5491,7 @@ perft 4 273925
 perft 5 6720181
 perft 6 187205941
 
-id 1
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 epd brn1krnb/p3pppp/1qpp4/1p6/2P3P1/1P6/P2PPP1P/BRNQKRNB w FBfb - 1 9
 perft 1 30
 perft 2 835
@@ -5499,7 +5500,7 @@ perft 4 716151
 perft 5 21806428
 perft 6 654487872
 
-id 1
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 epd r1b1qkrn/1p1ppppp/p1p1n3/8/4P3/1PN5/P1PPQPPb/RBB2KRN w GAga - 0 9
 perft 1 28
 perft 2 825
@@ -5508,7 +5509,7 @@ perft 4 716585
 perft 5 22079005
 perft 6 647939781
 
-id 1
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 epd r1bbqk1n/p1pppprp/n7/1p4p1/5P2/2N3N1/PPPPP1PP/1RBBQKR1 w Ga - 4 9
 perft 1 25
 perft 2 545
@@ -5517,7 +5518,7 @@ perft 4 358854
 perft 5 10271111
 perft 6 273864588
 
-id 1
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 epd rnbqkbrn/p1pp1pp1/4p3/7p/2p4P/2P5/PP1PPPP1/R1BQKBRN w GAga - 0 9
 perft 1 17
 perft 2 445
@@ -5526,7 +5527,7 @@ perft 4 255098
 perft 5 5918310
 perft 6 174733195
 
-id 1
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 epd rnbqkrnb/1p1pp1p1/2p4p/p4p2/3P2P1/7N/PPPBPP1P/RN1QKR1B w FAfa - 0 9
 perft 1 34
 perft 2 746
@@ -5535,7 +5536,7 @@ perft 4 623133
 perft 5 21285553
 perft 6 569141201
 
-id 1
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 epd rbnqbkr1/1ppppp2/p5n1/6pp/4P3/1N6/PPPP1PPP/RBQ1BRKN w ga - 2 9
 perft 1 18
 perft 2 466
@@ -5544,7 +5545,7 @@ perft 4 260864
 perft 5 6051500
 perft 6 170135726
 
-id 1
+id 616
 epd rnqb1krn/ppppp1p1/7p/7b/P1P2pPP/8/1P1PPP2/RNQBBKRN w GAga - 0 9
 perft 1 24
 perft 2 575
@@ -5553,7 +5554,7 @@ perft 4 385825
 perft 5 11039042
 perft 6 291243811
 
-id 1
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 epd rnqkbbr1/p1pp1ppp/4p3/1p6/P3P2n/5P2/1PPP1NPP/RNQKBBR1 w GAga - 2 9
 perft 1 27
 perft 2 803
@@ -5562,7 +5563,7 @@ perft 4 694449
 perft 5 20666099
 perft 6 638696065
 
-id 1
+id 618
 epd rn1kbrnb/1qppp1pp/1p6/p4p2/1B1P4/1P5N/P1P1PPPP/RNQK1R1B w FAfa - 0 9
 perft 1 37
 perft 2 1209
@@ -5571,7 +5572,7 @@ perft 4 1425600
 perft 5 49748034
 perft 6 1671593862
 
-id 1
+id 619
 epd rbnqkrbn/Bppp1p2/p5pp/4p3/5P2/6PP/PPPPP3/RBNQKR1N w FAfa - 0 9
 perft 1 29
 perft 2 720
@@ -5580,7 +5581,7 @@ perft 4 534148
 perft 5 15384362
 perft 6 421343249
 
-id 1
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 epd rnqbkr1n/1p1ppbpp/3p1p2/p7/8/1P6/P1PPPPPP/R1QBKRBN w FAfa - 0 9
 perft 1 20
 perft 2 657
@@ -5589,7 +5590,7 @@ perft 4 492678
 perft 5 11843134
 perft 6 413965054
 
-id 1
+id 621
 epd rnqkrb1n/ppppp3/6p1/5p1p/2b2P2/P1N5/1PPPP1PP/RQ1KRBBN w EAea - 1 9
 perft 1 28
 perft 2 749
@@ -5598,7 +5599,7 @@ perft 4 543151
 perft 5 15379233
 perft 6 417191461
 
-id 1
+id 622
 epd rnqk1nbb/1pp2ppp/3pr3/p3p3/3P1P2/2N3N1/PPP1P1PP/R1QKR1BB w EAa - 1 9
 perft 1 29
 perft 2 883
@@ -5607,7 +5608,7 @@ perft 4 815098
 perft 5 25144295
 perft 6 789705382
 
-id 1
+id 623
 epd bbr1kqrn/p1p1ppp1/1p2n2p/3p4/1P1P4/2N5/P1P1PPPP/BBR1KQRN w GCgc - 0 9
 perft 1 22
 perft 2 485
@@ -5616,7 +5617,7 @@ perft 4 271271
 perft 5 6825123
 perft 6 171793012
 
-id 1
+id 624
 epd brnbkq1n/ppp1ppr1/7p/3p2p1/2P3PP/8/PPBPPP2/BRN1KQRN w GBb - 2 9
 perft 1 30
 perft 2 634
@@ -5625,7 +5626,7 @@ perft 4 442537
 perft 5 13674310
 perft 6 345386924
 
-id 1
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 epd brnkqbr1/1pppp1pp/5p2/p7/P1P1P2n/8/1P1P1PP1/BRNKQBRN w GBgb - 0 9
 perft 1 21
 perft 2 504
@@ -5634,7 +5635,7 @@ perft 4 305184
 perft 5 7778289
 perft 6 217596497
 
-id 1
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 epd b1rkqrnb/p1ppp1pp/1p1n4/5p2/5P2/PN5P/1PPPP1P1/BR1KQRNB w FBf - 0 9
 perft 1 23
 perft 2 688
@@ -5643,7 +5644,7 @@ perft 4 531592
 perft 5 14228372
 perft 6 451842354
 
-id 1
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 epd 1bbnkqrn/rppppp2/p5p1/7p/7P/P1P1P3/1P1P1PP1/RBBNKQRN w GAg - 1 9
 perft 1 25
 perft 2 450
@@ -5652,7 +5653,7 @@ perft 4 263946
 perft 5 7752404
 perft 6 185393913
 
-id 1
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 epd rnbbkqr1/1pppppp1/7p/p3n3/PP5P/8/1BPPPPP1/RN1BKQRN w GAga - 0 9
 perft 1 23
 perft 2 543
@@ -5661,7 +5662,7 @@ perft 4 305812
 perft 5 7549008
 perft 6 199883770
 
-id 1
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 epd r1bkqbrn/ppppp1pp/8/5p2/3nPP2/1P4N1/P1PP2PP/RNBKQBR1 w GAga - 1 9
 perft 1 27
 perft 2 751
@@ -5670,7 +5671,7 @@ perft 4 600417
 perft 5 17989920
 perft 6 527273615
 
-id 1
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 epd rnbkqr1b/1p1pp1pp/p4p1n/2p5/1P5P/N4P2/P1PPP1P1/R1BKQRNB w FAfa - 0 9
 perft 1 21
 perft 2 498
@@ -5679,7 +5680,7 @@ perft 4 302278
 perft 5 7808375
 perft 6 216224115
 
-id 1
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 epd rbnkbqrn/p1p3pp/1p1p4/B3pp2/3P2P1/6N1/PPP1PP1P/RBNK1QR1 w GAga - 0 9
 perft 1 34
 perft 2 977
@@ -5688,7 +5689,7 @@ perft 4 961128
 perft 5 33318567
 perft 6 978991050
 
-id 1
+id 632
 epd r1kbbqrn/ppp3pp/2np1p2/1P2p3/3P1P2/8/P1P1P1PP/RNKBBQRN w GAga - 0 9
 perft 1 32
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@@ -5697,7 +5698,7 @@ perft 4 844881
 perft 5 26763259
 perft 6 797524786
 
-id 1
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 epd rk1qbbrn/p2npppp/1p6/2p4Q/8/4P3/PPPP1PPP/RNK1B1RN w GA - 2 9
 perft 1 35
 perft 2 657
@@ -5706,7 +5707,7 @@ perft 4 495406
 perft 5 16662477
 perft 6 419496845
 
-id 1
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 epd rnk1brnb/pp1p1pp1/8/q1p1p2p/5P2/NP6/P1PPP1PP/R1KQBRNB w FAfa - 1 9
 perft 1 26
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@@ -5715,7 +5716,7 @@ perft 4 610661
 perft 5 16987110
 perft 6 523437649
 
-id 1
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 epd rb1kqrbn/npp1ppp1/p7/3P3p/2PP4/8/PP3PPP/RBNKQRBN w FAfa - 0 9
 perft 1 35
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@@ -5724,7 +5725,7 @@ perft 4 661118
 perft 5 23983464
 perft 6 625669222
 
-id 1
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 epd rnkb1rbn/pp1p2pp/8/2p1pp1q/P6P/1PN5/2PPPPP1/R1KBQRBN w FAfa - 1 9
 perft 1 22
 perft 2 899
@@ -5733,7 +5734,7 @@ perft 4 850597
 perft 5 21518343
 perft 6 857951339
 
-id 1
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 epd rnkqrbbn/1pppp1p1/8/p2N1p1p/2P4P/8/PP1PPPP1/R1KQRBBN w EAea - 0 9
 perft 1 29
 perft 2 585
@@ -5742,7 +5743,7 @@ perft 4 393221
 perft 5 12238776
 perft 6 299752383
 
-id 1
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 epd rnk1r1bb/pp1ppppp/1q4n1/2p5/5P1P/3PP3/PPP3P1/RNKQRNBB w EAea - 1 9
 perft 1 27
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@@ -5751,7 +5752,7 @@ perft 4 811915
 perft 5 23698701
 perft 6 790239502
 
-id 1
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 epd bbrnkrqn/1ppp1p2/6pp/p3p3/5PP1/2PB4/PP1PP2P/B1RNKRQN w FCfc - 0 9
 perft 1 37
 perft 2 693
@@ -5760,7 +5761,7 @@ perft 4 550527
 perft 5 20138432
 perft 6 481498664
 
-id 1
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 epd b1rbkrqn/ppp2ppp/1n2p3/3p4/6P1/2PP4/PP2PP1P/BRNBKRQN w FBf - 1 9
 perft 1 21
 perft 2 463
@@ -5769,7 +5770,7 @@ perft 4 253204
 perft 5 6307276
 perft 6 159025909
 
-id 1
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 epd brnkrb1n/1pp1p1pp/3p4/p1Nq1p2/2P5/8/PP1PPPPP/BRK1RBQN w eb - 2 9
 perft 1 27
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@@ -5778,7 +5779,7 @@ perft 4 496072
 perft 5 12604078
 perft 6 362747791
 
-id 1
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 epd brn1r1nb/ppppkppp/4p3/8/2PP1P2/8/PP1KP1PP/BRN1RQNB w - - 1 9
 perft 1 25
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@@ -5787,7 +5788,7 @@ perft 4 426659
 perft 5 12290985
 perft 6 317097424
 
-id 1
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 epd rbb1krqn/1pp1pp1p/p3n1p1/3pP3/8/1PN5/P1PP1PPP/RBB1KRQN w FAfa d6 0 9
 perft 1 23
 perft 2 529
@@ -5796,7 +5797,7 @@ perft 4 310277
 perft 5 7861413
 perft 6 202594556
 
-id 1
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 epd r1bbkrqn/p1pppppp/8/4n3/1p5P/P2P2P1/1PP1PP2/RNBBKRQN w FAfa - 0 9
 perft 1 23
 perft 2 571
@@ -5805,7 +5806,7 @@ perft 4 346793
 perft 5 8699448
 perft 6 243460643
 
-id 1
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 epd rnbkrbqn/p1pp1ppp/4p3/1p6/8/BPN3P1/P1PPPP1P/R2KRBQN w EAea - 2 9
 perft 1 29
 perft 2 692
@@ -5814,7 +5815,7 @@ perft 4 500375
 perft 5 14904192
 perft 6 386694739
 
-id 1
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 epd rnbkrqn1/pppppp2/8/1Q2b1pp/P3P3/5P2/1PPP2PP/RNBKR1NB w EAea - 0 9
 perft 1 37
 perft 2 1001
@@ -5823,7 +5824,7 @@ perft 4 987842
 perft 5 35626426
 perft 6 993747544
 
-id 1
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 epd rbnkbrqn/p1pppp2/7p/1p4pP/3P1P2/8/PPP1P1P1/RBNKBRQN w FAfa - 0 9
 perft 1 30
 perft 2 564
@@ -5832,7 +5833,7 @@ perft 4 381364
 perft 5 11859538
 perft 6 293703269
 
-id 1
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 epd 1nkbbrqn/3ppppp/r1p5/pp6/8/4PP2/PPPPN1PP/RNKBBRQ1 w FAf - 2 9
 perft 1 26
 perft 2 546
@@ -5841,7 +5842,7 @@ perft 4 344592
 perft 5 9556962
 perft 6 245137199
 
-id 1
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 epd rnkrbbq1/pppppnp1/7p/8/1B1Q1p2/3P1P2/PPP1P1PP/RNKR1B1N w DAda - 2 9
 perft 1 43
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@@ -5850,7 +5851,7 @@ perft 4 846858
 perft 5 33185346
 perft 6 851927292
 
-id 1
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 epd 1rkrbqnb/pppppp2/2n3p1/7p/3P3P/P4N2/1PP1PPP1/RNKRBQ1B w DAd - 0 9
 perft 1 26
 perft 2 622
@@ -5859,7 +5860,7 @@ perft 4 403921
 perft 5 10786140
 perft 6 285233838
 
-id 1
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 epd rbnkr1bn/pp1pqp1p/2p1p3/6p1/3P4/7P/PPP1PPP1/RBNKRQBN w EAea - 0 9
 perft 1 19
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@@ -5868,7 +5869,7 @@ perft 4 381197
 perft 5 9107175
 perft 6 293397389
 
-id 1
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 epd r1kbrqb1/pppp2pp/2n1p1n1/5p1B/4PP2/P7/1PPP2PP/RNK1RQBN w EAea - 2 9
 perft 1 39
 perft 2 1359
@@ -5877,7 +5878,7 @@ perft 4 1876028
 perft 5 73871486
 perft 6 2633945690
 
-id 1
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 epd rnkrqbbn/p1p3pp/1p1ppp2/8/1P6/3P2P1/PKP1PP1P/RN1RQBBN w da - 0 9
 perft 1 26
 perft 2 776
@@ -5886,7 +5887,7 @@ perft 4 611907
 perft 5 16884013
 perft 6 503561996
 
-id 1
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 epd rnkrqnbb/ppp2p1p/3p4/4p1p1/3P3P/N1Q5/PPP1PPP1/R1KR1NBB w DAda - 0 9
 perft 1 40
 perft 2 1175
@@ -5895,7 +5896,7 @@ perft 4 1375884
 perft 5 52620163
 perft 6 1633655838
 
-id 1
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 epd bbrnkrn1/p1pppp2/1p6/6pp/3q4/1P3QP1/P1PPPP1P/BBRNKRN1 w FCfc - 0 9
 perft 1 34
 perft 2 1398
@@ -5904,7 +5905,7 @@ perft 4 1712950
 perft 5 57268492
 perft 6 2059942014
 
-id 1
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 epd br1bkrnq/1p2pppp/pnp5/3p4/P1P5/5P2/1P1PPKPP/BRNB1RNQ w fb - 2 9
 perft 1 24
 perft 2 501
@@ -5913,7 +5914,7 @@ perft 4 284936
 perft 5 7049659
 perft 6 177940764
 
-id 1
+id 657
 epd brnkrbn1/pppppp1q/B6p/6p1/8/1P2PP2/P1PP2PP/BRNKR1NQ w EBeb - 0 9
 perft 1 34
 perft 2 815
@@ -5922,7 +5923,7 @@ perft 4 700970
 perft 5 22006883
 perft 6 639803952
 
-id 1
+id 658
 epd br1krnqb/pppppp1p/1n4p1/8/8/P2NN3/2PPPPPP/BR1K1RQB w Beb - 2 9
 perft 1 37
 perft 2 1029
@@ -5931,7 +5932,7 @@ perft 4 1025712
 perft 5 36214583
 perft 6 1026195877
 
-id 1
+id 659
 epd rbbnkr1q/p1p2ppp/1p1ppn2/8/1PP4P/8/P2PPPP1/RBBNKRNQ w FAfa - 0 9
 perft 1 28
 perft 2 755
@@ -5940,7 +5941,7 @@ perft 4 605106
 perft 5 18972778
 perft 6 513486101
 
-id 1
+id 660
 epd r1b1krnq/pp2pppp/1bn5/2pp4/4N3/5P2/PPPPPRPP/R1BBK1NQ w Afa - 0 9
 perft 1 24
 perft 2 705
@@ -5949,7 +5950,7 @@ perft 4 532521
 perft 5 13532966
 perft 6 426443376
 
-id 1
+id 661
 epd 1nbkrbn1/rpppppqp/p7/6p1/4P3/3P2P1/PPP1KP1P/RNB1RBNQ w e - 1 9
 perft 1 31
 perft 2 800
@@ -5958,7 +5959,7 @@ perft 4 693366
 perft 5 21193292
 perft 6 625757852
 
-id 1
+id 662
 epd r1bkrnqb/pp3ppp/n1ppp3/8/1P5P/P7/R1PPPPP1/1NBKRNQB w Eea - 0 9
 perft 1 21
 perft 2 482
@@ -5967,7 +5968,7 @@ perft 4 275339
 perft 5 7112890
 perft 6 180378139
 
-id 1
+id 663
 epd rbnkbrnq/ppp1p2p/5p2/3p2p1/1B1P4/1N4P1/PPP1PP1P/RB1K1RNQ w FAfa - 0 9
 perft 1 33
 perft 2 780
@@ -5976,7 +5977,7 @@ perft 4 628945
 perft 5 20756770
 perft 6 535497008
 
-id 1
+id 664
 epd rnk1brnq/pp1ppppp/2p5/b7/8/1P2P2P/P1PP1PPQ/RNKBBRN1 w FAfa - 3 9
 perft 1 29
 perft 2 648
@@ -5985,7 +5986,7 @@ perft 4 449637
 perft 5 13722785
 perft 6 341389148
 
-id 1
+id 665
 epd rnkrbbnq/p1p3pp/5p2/1p1pp3/P7/1PN2P2/2PPP1PP/R1KRBBNQ w DAda - 0 9
 perft 1 26
 perft 2 827
@@ -5994,7 +5995,7 @@ perft 4 683167
 perft 5 18916370
 perft 6 589161126
 
-id 1
+id 666
 epd r1krbnqb/p1pp1ppp/2n1p3/8/1p4P1/PPP5/3PPP1P/RNKRBNQB w DAda - 1 9
 perft 1 25
 perft 2 540
@@ -6003,7 +6004,7 @@ perft 4 331332
 perft 5 9491817
 perft 6 225389422
 
-id 1
+id 667
 epd rbnkrnbq/ppp1pp2/3p2p1/2N5/P6p/2P5/1P1PPPPP/RB1KRNBQ w EAea - 0 9
 perft 1 32
 perft 2 790
@@ -6012,7 +6013,7 @@ perft 4 661207
 perft 5 20906017
 perft 6 578332225
 
-id 1
+id 668
 epd rnkbrn1q/1ppppppb/8/p4N1p/8/P1N5/1PPPPPPP/R1KBR1BQ w EAea - 0 9
 perft 1 31
 perft 2 691
@@ -6021,7 +6022,7 @@ perft 4 510665
 perft 5 15308408
 perft 6 404129987
 
-id 1
+id 669
 epd rnkrnbbq/p1p2ppp/3pp3/1p6/6P1/4PQ1B/PPPP1P1P/RNKRN1B1 w DAda - 0 9
 perft 1 29
 perft 2 558
@@ -6030,7 +6031,7 @@ perft 4 352887
 perft 5 10825379
 perft 6 246965507
 
-id 1
+id 670
 epd rnkrnqbb/pp2p1p1/3p3p/2p2p2/5P2/1P1N4/P1PPPQPP/RNKR2BB w DAda - 0 9
 perft 1 29
 perft 2 762
@@ -6039,7 +6040,7 @@ perft 4 644936
 perft 5 20522675
 perft 6 596067005
 
-id 1
+id 671
 epd bb1rknnr/ppqppppp/8/2p5/3P1N2/1P6/P1P1PPPP/BBQRKN1R w HDhd - 1 9
 perft 1 33
 perft 2 963
@@ -6048,7 +6049,7 @@ perft 4 1000890
 perft 5 34552118
 perft 6 1124738493
 
-id 1
+id 672
 epd bqrbknnr/ppp1p2p/8/3p1p2/5p2/P3N2P/1PPPP1P1/BQRBK1NR w HChc - 0 9
 perft 1 20
 perft 2 398
@@ -6057,7 +6058,7 @@ perft 4 194859
 perft 5 4834319
 perft 6 113660536
 
-id 1
+id 673
 epd b1rk1bnr/qpp1pppp/p4n2/3p4/3PPP2/7N/PPP3PP/BQRKNB1R w HChc - 1 9
 perft 1 25
 perft 2 648
@@ -6066,7 +6067,7 @@ perft 4 455720
 perft 5 12200870
 perft 6 351766307
 
-id 1
+id 674
 epd bqkrnnrb/pppp2p1/4pp2/4P2p/6P1/7P/PPPP1P2/BQRKNNRB w GC - 1 9
 perft 1 30
 perft 2 493
@@ -6075,7 +6076,7 @@ perft 4 280726
 perft 5 8786998
 perft 6 181492621
 
-id 1
+id 675
 epd q1brknnr/1p1ppppp/p7/2p5/8/1PPP4/P2RPPPP/QBB1KNNR w Hhd - 0 9
 perft 1 25
 perft 2 501
@@ -6084,7 +6085,7 @@ perft 4 290463
 perft 5 7982978
 perft 6 192717198
 
-id 1
+id 676
 epd qrb1k1nr/ppppb1pp/6n1/4ppN1/3P4/4N3/PPP1PPPP/QRBBK2R w HBhb - 2 9
 perft 1 31
 perft 2 872
@@ -6093,7 +6094,7 @@ perft 4 739276
 perft 5 22493014
 perft 6 646855304
 
-id 1
+id 677
 epd 1rbknbnr/1ppp1pp1/q6p/p3p3/5P2/2PPB3/PP2P1PP/QR1KNBNR w HBhb - 0 9
 perft 1 28
 perft 2 1020
@@ -6102,7 +6103,7 @@ perft 4 984000
 perft 5 27484692
 perft 6 947786800
 
-id 1
+id 678
 epd qrbk2rb/1ppp1ppp/5nn1/p3p3/1N6/P7/1PPPPPPP/QRB1KNRB w gb - 0 9
 perft 1 23
 perft 2 592
@@ -6111,7 +6112,7 @@ perft 4 395716
 perft 5 10098215
 perft 6 293988585
 
-id 1
+id 679
 epd qbrk1nnr/1pp1pppp/2b5/p2p4/P2P2P1/8/1PP1PP1P/QBKRBNNR w hc - 1 9
 perft 1 26
 perft 2 654
@@ -6120,7 +6121,7 @@ perft 4 471653
 perft 5 13740891
 perft 6 373081138
 
-id 1
+id 680
 epd qrkbbnnr/ppp2p1p/4p3/3p2p1/P7/2PP4/1P2PPPP/QRKBBNNR w HBhb - 0 9
 perft 1 25
 perft 2 626
@@ -6129,7 +6130,7 @@ perft 4 431634
 perft 5 12079406
 perft 6 324006164
 
-id 1
+id 681
 epd qr1kbbnr/ppp1pp1p/4n1p1/2Pp4/6P1/4N3/PP1PPP1P/QRK1BBNR w HB d6 0 9
 perft 1 26
 perft 2 699
@@ -6138,7 +6139,7 @@ perft 4 497152
 perft 5 13353359
 perft 6 375702908
 
-id 1
+id 682
 epd qrk1b1rb/p1pppppp/3nnQ2/1p6/1P3P2/3P4/P1P1P1PP/1RKNBNRB w GBgb - 3 9
 perft 1 43
 perft 2 1369
@@ -6147,7 +6148,7 @@ perft 4 1831200
 perft 5 71514365
 perft 6 2427477375
 
-id 1
+id 683
 epd qbrk1nbr/pppp3p/5n2/4ppp1/3P1P2/4N3/PPP1P1PP/QBKRN1BR w hc - 0 9
 perft 1 25
 perft 2 752
@@ -6156,7 +6157,7 @@ perft 4 615263
 perft 5 17493373
 perft 6 543180234
 
-id 1
+id 684
 epd qrkb1nbr/1pppppQp/3n4/p7/5p2/1P1N4/P1PPP1PP/1RKB1NBR w HBhb - 0 9
 perft 1 45
 perft 2 946
@@ -6165,7 +6166,7 @@ perft 4 966903
 perft 5 39736157
 perft 6 1051910977
 
-id 1
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 epd qrk1nbbr/ppp1p1p1/4n2p/3p1p2/1P5P/3P2P1/P1P1PP2/QRKNNBBR w HBhb - 1 9
 perft 1 32
 perft 2 770
@@ -6174,7 +6175,7 @@ perft 4 646977
 perft 5 21717615
 perft 6 577979364
 
-id 1
+id 686
 epd qrkn1rbb/pp2pppp/2p5/3p4/P2Qn1P1/1P6/2PPPP1P/1RKNNRBB w FBfb - 0 9
 perft 1 38
 perft 2 943
@@ -6183,7 +6184,7 @@ perft 4 868165
 perft 5 31909835
 perft 6 798405123
 
-id 1
+id 687
 epd bbrqknnr/ppp4p/3pp3/5pp1/4PP2/5Q2/PPPP2PP/BBR1KNNR w HChc - 0 9
 perft 1 36
 perft 2 843
@@ -6192,7 +6193,7 @@ perft 4 758528
 perft 5 26828059
 perft 6 723306114
 
-id 1
+id 688
 epd 1rqbkn1r/p1p1pppp/1p5n/P2p4/3Pb1P1/8/1PP1PP1P/BRQBKNNR w HBhb - 0 9
 perft 1 23
 perft 2 778
@@ -6201,7 +6202,7 @@ perft 4 649789
 perft 5 17337683
 perft 6 579112676
 
-id 1
+id 689
 epd br1knbnr/1qp1pppp/pp1p4/8/8/PP6/2PPPPPP/BRQKNBNR w HBhb - 2 9
 perft 1 26
 perft 2 697
@@ -6210,7 +6211,7 @@ perft 4 546622
 perft 5 15280079
 perft 6 473071890
 
-id 1
+id 690
 epd brqk2rb/ppppp1pp/4np2/8/2n5/3P1Q2/PP2PPPP/BR1KNNRB w GBgb - 0 9
 perft 1 32
 perft 2 948
@@ -6219,7 +6220,7 @@ perft 4 885713
 perft 5 29821322
 perft 6 874251866
 
-id 1
+id 691
 epd r1bqknnr/pp1pp1p1/5p1p/2p1b2N/2P5/8/PPQPPPPP/RBB1K1NR w HAha - 0 9
 perft 1 31
 perft 2 785
@@ -6228,7 +6229,7 @@ perft 4 659952
 perft 5 22244193
 perft 6 592797491
 
-id 1
+id 692
 epd rqbbknnr/ppppp2p/5pp1/8/8/1P3PP1/PQPPP2P/R1BBKNNR w HAha - 0 9
 perft 1 23
 perft 2 391
@@ -6237,7 +6238,7 @@ perft 4 198450
 perft 5 5576671
 perft 6 121267576
 
-id 1
+id 693
 epd rqbknbnr/1pp1p2p/p7/3p1pp1/7N/1PP5/P2PPPPP/RQBK1BNR w HAha - 0 9
 perft 1 27
 perft 2 676
@@ -6246,7 +6247,7 @@ perft 4 522428
 perft 5 15955388
 perft 6 448477218
 
-id 1
+id 694
 epd rqb1nnrb/2ppkppp/1p2p3/p7/2PPP3/1P6/P4PPP/RQBKNNRB w GA - 1 9
 perft 1 31
 perft 2 727
@@ -6255,7 +6256,7 @@ perft 4 570647
 perft 5 18361051
 perft 6 483248153
 
-id 1
+id 695
 epd rb1kbn1r/p1ppppp1/qp5n/7p/P7/RPP5/3PPPPP/1BQKBNNR w Hha - 2 9
 perft 1 29
 perft 2 837
@@ -6264,7 +6265,7 @@ perft 4 730083
 perft 5 21279560
 perft 6 682863811
 
-id 1
+id 696
 epd rqkbb1nr/p1p2ppp/1p1p2n1/3Np3/4P3/5N2/PPPP1PPP/RQKBB2R w HAha - 0 9
 perft 1 28
 perft 2 717
@@ -6273,7 +6274,7 @@ perft 4 550987
 perft 5 16347343
 perft 6 453153783
 
-id 1
+id 697
 epd rqknbbr1/p1pppp1p/1p3np1/8/4P3/2P2P1P/PP1P2P1/RQKNBBNR w HAa - 0 9
 perft 1 27
 perft 2 650
@@ -6282,7 +6283,7 @@ perft 4 475303
 perft 5 13847463
 perft 6 383256006
 
-id 1
+id 698
 epd r1k1bnrb/1qpppppp/1p2n3/p7/1P5P/6P1/P1PPPP2/RQKNBNR1 w GAga - 1 9
 perft 1 24
 perft 2 806
@@ -6291,7 +6292,7 @@ perft 4 713220
 perft 5 19382263
 perft 6 686009788
 
-id 1
+id 699
 epd rb1knnbr/1pp1ppp1/p2p3p/5q2/3B2P1/3P1P2/PPP1P2P/RBQKNN1R w HAha - 0 9
 perft 1 34
 perft 2 1360
@@ -6300,7 +6301,7 @@ perft 4 1605706
 perft 5 51973672
 perft 6 1837704407
 
-id 1
+id 700
 epd rqkb1nbr/p1p1ppp1/1p3n1p/2Qp4/8/2P5/PP1PPPPP/R1KBNNBR w HAha - 2 9
 perft 1 39
 perft 2 983
@@ -6309,7 +6310,7 @@ perft 4 940989
 perft 5 36347815
 perft 6 918801645
 
-id 1
+id 701
 epd rqknnbbr/2pppp2/pp5p/6p1/1P1P4/4PP2/P1P3PP/RQKNNBBR w HAha - 0 9
 perft 1 26
 perft 2 628
@@ -6318,7 +6319,7 @@ perft 4 464924
 perft 5 13787303
 perft 6 386125234
 
-id 1
+id 702
 epd rqkn1rbb/1pp1pppp/p7/3p4/3Pn3/2P1PP2/PP4PP/RQKNNRBB w FAfa - 1 9
 perft 1 20
 perft 2 527
@@ -6327,7 +6328,7 @@ perft 4 321533
 perft 5 8082183
 perft 6 219311659
 
-id 1
+id 703
 epd bbrkqn1r/1pppppp1/5n2/p7/1PP2P1p/7N/P2PP1PP/BBRKQN1R w HChc - 1 9
 perft 1 36
 perft 2 963
@@ -6336,7 +6337,7 @@ perft 4 973839
 perft 5 35907489
 perft 6 1034223364
 
-id 1
+id 704
 epd brkbqn1r/p2ppppp/7n/1p6/P1p3PP/8/1PPPPP1N/BRKBQ1NR w HBhb - 0 9
 perft 1 18
 perft 2 583
@@ -6345,7 +6346,7 @@ perft 4 394603
 perft 5 8858385
 perft 6 304339862
 
-id 1
+id 705
 epd brkq1bnr/pp1ppp1p/8/2p2np1/P7/8/1PPPPPPP/BRKQNBNR w HBhb - 0 9
 perft 1 19
 perft 2 552
@@ -6354,7 +6355,7 @@ perft 4 354260
 perft 5 8432183
 perft 6 262293169
 
-id 1
+id 706
 epd brkqnnrb/1ppppppp/8/8/p3P3/5N2/PPPP1PPP/BRKQ1NRB w GBgb - 3 9
 perft 1 21
 perft 2 397
@@ -6363,7 +6364,7 @@ perft 4 204350
 perft 5 5489836
 perft 6 128389738
 
-id 1
+id 707
 epd rbbkq1nr/1p2pppp/p1p3nB/3p4/1Q1P4/6N1/PPP1PPPP/RB1K2NR w HAha - 0 9
 perft 1 40
 perft 2 1132
@@ -6372,7 +6373,7 @@ perft 4 1260470
 perft 5 47425783
 perft 6 1415578783
 
-id 1
+id 708
 epd rkbbq1nr/1pppp1p1/4np2/p6p/8/PP3P2/1KPPP1PP/R1BBQNNR w ha - 0 9
 perft 1 24
 perft 2 596
@@ -6381,7 +6382,7 @@ perft 4 402121
 perft 5 10822049
 perft 6 302056813
 
-id 1
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 epd r1bqn1nr/pkpppp1p/1p4pb/8/PN6/R7/1PPPPPPP/1KBQ1BNR w H - 2 9
 perft 1 33
 perft 2 794
@@ -6390,7 +6391,7 @@ perft 4 649150
 perft 5 20919309
 perft 6 561073410
 
-id 1
+id 710
 epd rkb1nnrb/1pppq1pp/p4p2/4p3/5P2/1P1PB3/P1P1P1PP/RK1QNNRB w GAga - 0 9
 perft 1 26
 perft 2 625
@@ -6399,7 +6400,7 @@ perft 4 442036
 perft 5 12515042
 perft 6 342967558
 
-id 1
+id 711
 epd rbkqbn1r/pppp1p1p/2n1p1p1/8/8/1P1PP1N1/P1P2PPP/RBKQB1NR w HAha - 1 9
 perft 1 30
 perft 2 660
@@ -6408,7 +6409,7 @@ perft 4 492714
 perft 5 15348335
 perft 6 403323883
 
-id 1
+id 712
 epd rkqbb1n1/pppppppr/8/6np/5P2/8/PPPPP1PP/RKQBBNNR w HAa - 6 9
 perft 1 23
 perft 2 500
@@ -6417,7 +6418,7 @@ perft 4 292936
 perft 5 7519117
 perft 6 196524441
 
-id 1
+id 713
 epd rkqnbbnr/ppppppp1/8/7p/3N4/6PP/PPPPPP2/RKQNBB1R w HAa - 0 9
 perft 1 24
 perft 2 484
@@ -6426,7 +6427,7 @@ perft 4 284570
 perft 5 7775173
 perft 6 193947530
 
-id 1
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 epd rkqnb1rb/p1p1pppp/1p1p4/2n5/3P4/2P1N1N1/PP2PPPP/RKQ1B1RB w GAga - 0 9
 perft 1 28
 perft 2 1020
@@ -6435,7 +6436,7 @@ perft 4 1027904
 perft 5 30515456
 perft 6 1073711823
 
-id 1
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 epd rbk1nnbr/1ppq1ppp/p2p4/4p3/P3B2P/2P5/1P1PPPP1/R1KQNNBR w HAha - 2 9
 perft 1 38
 perft 2 998
@@ -6444,7 +6445,7 @@ perft 4 1047592
 perft 5 38552638
 perft 6 1139322479
 
-id 1
+id 716
 epd r1qbn1br/k1pppppp/6n1/pp6/5P1P/P7/1PPPP1PB/RKQBNN1R w HA - 1 9
 perft 1 22
 perft 2 549
@@ -6453,7 +6454,7 @@ perft 4 348574
 perft 5 8725809
 perft 6 251613569
 
-id 1
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 epd rkqnn1br/pppp3p/4p1pb/5p2/P2P4/7P/1PP1PPPB/RKQNNB1R w HAha - 1 9
 perft 1 32
 perft 2 659
@@ -6462,7 +6463,7 @@ perft 4 469701
 perft 5 15434721
 perft 6 365761521
 
-id 1
+id 718
 epd rk1nnrbb/p1p1pppp/1p6/3p1q2/P3P3/2NN4/1PPP1PPP/RKQ2RBB w FAfa - 3 9
 perft 1 29
 perft 2 989
@@ -6471,7 +6472,7 @@ perft 4 980477
 perft 5 29643404
 perft 6 998848556
 
-id 1
+id 719
 epd bbrk1q1r/ppppppp1/3n4/7p/3Pn3/6PN/PPP1PPNP/BBRK1Q1R w HChc - 2 9
 perft 1 23
 perft 2 712
@@ -6480,7 +6481,7 @@ perft 4 516177
 perft 5 12995202
 perft 6 411077508
 
-id 1
+id 720
 epd brkbnq1r/p1ppp2p/5ppn/1p6/5P2/1P1P2P1/P1P1P2P/BRKBNQNR w HBhb - 0 9
 perft 1 28
 perft 2 856
@@ -6489,7 +6490,7 @@ perft 4 780503
 perft 5 23529352
 perft 6 754501112
 
-id 1
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 epd br1k1bnr/ppppp1pp/4np2/1B2P2q/3P4/8/PPP2PPP/BRKNQ1NR w HB - 3 9
 perft 1 36
 perft 2 1214
@@ -6498,7 +6499,7 @@ perft 4 1328331
 perft 5 45096834
 perft 6 1470987023
 
-id 1
+id 722
 epd brk1qnrb/pnppp1p1/1p6/5p1p/8/5PPP/PPPPP1R1/BRKNQN1B w Bgb - 0 9
 perft 1 22
 perft 2 551
@@ -6507,7 +6508,7 @@ perft 4 353317
 perft 5 9040545
 perft 6 259643605
 
-id 1
+id 723
 epd rbbkn1nr/1ppp2pp/p3p3/2q2p2/3P4/6P1/PPPBPP1P/RB1KNQNR w HAha - 0 9
 perft 1 31
 perft 2 1060
@@ -6516,7 +6517,7 @@ perft 4 1015099
 perft 5 30314172
 perft 6 976268967
 
-id 1
+id 724
 epd rkbbn1nr/ppppp1pp/8/6N1/5p2/1q6/P1PPPPPP/RKBBN1QR w HAha - 0 9
 perft 1 3
 perft 2 72
@@ -6525,7 +6526,7 @@ perft 4 50827
 perft 5 1400832
 perft 6 39654253
 
-id 1
+id 725
 epd rkb2bnr/pp2pppp/2p1n3/3p4/q2P4/5NP1/PPP1PP1P/RKBNQBR1 w Aha - 0 9
 perft 1 29
 perft 2 861
@@ -6534,7 +6535,7 @@ perft 4 763454
 perft 5 22763215
 perft 6 731511256
 
-id 1
+id 726
 epd rkbq1nrb/ppppppp1/7p/8/1P1n4/P4P1P/2PPP1P1/RKBNQNRB w GAga - 0 9
 perft 1 25
 perft 2 672
@@ -6543,7 +6544,7 @@ perft 4 473864
 perft 5 12954224
 perft 6 361237536
 
-id 1
+id 727
 epd rbknb1nr/ppp1qp1p/6p1/3pp3/3P3P/2B1P3/PPP2PP1/RBKN1QNR w HAha - 1 9
 perft 1 27
 perft 2 857
@@ -6552,7 +6553,7 @@ perft 4 792538
 perft 5 23790033
 perft 6 768247869
 
-id 1
+id 728
 epd rknbbq1r/p1pppppp/1p2N3/8/3n4/2P5/PP1PPPPP/RK1BBQNR w HAha - 4 9
 perft 1 29
 perft 2 763
@@ -6561,7 +6562,7 @@ perft 4 574054
 perft 5 16926075
 perft 6 447896703
 
-id 1
+id 729
 epd r1nqbbnr/1pppp1pp/1k6/p4p2/8/4P3/PPPP1PPP/RKN1BBNR w HA - 0 9
 perft 1 26
 perft 2 658
@@ -6570,7 +6571,7 @@ perft 4 464039
 perft 5 12380488
 perft 6 349047256
 
-id 1
+id 730
 epd rkn2qrb/ppp1pppp/6n1/1b1p4/1P6/4PPB1/P1PP2PP/RKNQ1NRB w GAga - 3 9
 perft 1 23
 perft 2 574
@@ -6579,7 +6580,7 @@ perft 4 370324
 perft 5 9501401
 perft 6 263870337
 
-id 1
+id 731
 epd rbkn2br/ppppp1p1/4np1p/1P5q/8/2P1N3/P2PPPPP/RBK1QNBR w HAha - 1 9
 perft 1 29
 perft 2 992
@@ -6588,7 +6589,7 @@ perft 4 999564
 perft 5 30148787
 perft 6 1045942540
 
-id 1
+id 732
 epd 1knbqnbr/1ppppp1p/r5p1/p7/7P/2PN2P1/PP1PPP2/RK1BQNBR w HAh - 2 9
 perft 1 26
 perft 2 698
@@ -6597,7 +6598,7 @@ perft 4 512023
 perft 5 14848229
 perft 6 402599313
 
-id 1
+id 733
 epd rk1qnbbr/pnpppp1p/6p1/1p6/3P4/1P6/P1P1PPPP/RKNQNBBR w HAha - 1 9
 perft 1 20
 perft 2 480
@@ -6606,7 +6607,7 @@ perft 4 287539
 perft 5 7425917
 perft 6 203194521
 
-id 1
+id 734
 epd rknqnrbb/pp1p2p1/5p1p/2p1p3/2P1P3/P2P4/1P3PPP/RKNQNRBB w FAfa - 0 9
 perft 1 26
 perft 2 679
@@ -6615,7 +6616,7 @@ perft 4 494953
 perft 5 13790137
 perft 6 392629571
 
-id 1
+id 735
 epd bbrk2qr/pp1p1ppp/3n2n1/2p1p3/3P1P2/6N1/PPP1P1PP/BBRKN1QR w HChc - 0 9
 perft 1 26
 perft 2 790
@@ -6624,7 +6625,7 @@ perft 4 673269
 perft 5 19259490
 perft 6 617563700
 
-id 1
+id 736
 epd b1krnnqr/1p1ppppp/p1p5/b6B/P7/4P1N1/1PPP1PPP/BRK1N1QR w HB - 2 9
 perft 1 26
 perft 2 625
@@ -6633,7 +6634,7 @@ perft 4 415452
 perft 5 11490615
 perft 6 304805107
 
-id 1
+id 737
 epd 1rknnbqr/3ppppp/p7/1pp5/4b2P/P4P2/1PPPP1PR/BRKNNBQ1 w Bhb - 1 9
 perft 1 24
 perft 2 757
@@ -6642,7 +6643,7 @@ perft 4 618777
 perft 5 17275100
 perft 6 544309489
 
-id 1
+id 738
 epd br1nn1rb/pppkpqpp/3p1p2/8/PP6/4N3/1KPPPPPP/BR2NQRB w - - 3 9
 perft 1 24
 perft 2 682
@@ -6651,7 +6652,7 @@ perft 4 482711
 perft 5 13057308
 perft 6 375033550
 
-id 1
+id 739
 epd rbbkn1qr/pppp2p1/6np/4pp2/7N/7P/PPPPPPPR/RBBK1NQ1 w Aha - 0 9
 perft 1 22
 perft 2 586
@@ -6660,7 +6661,7 @@ perft 4 409891
 perft 5 10607781
 perft 6 324452612
 
-id 1
+id 740
 epd rk1bn1qr/pppbpppp/4n3/4p3/4P3/5P2/PPPP2PP/RKBB1NQR w HAha - 1 9
 perft 1 22
 perft 2 530
@@ -6669,7 +6670,7 @@ perft 4 348004
 perft 5 9514787
 perft 6 259898748
 
-id 1
+id 741
 epd rkbnnbqr/1ppp1ppp/p7/4p3/8/QP3P2/P1PPP1PP/RKBNNB1R w HAha - 0 9
 perft 1 29
 perft 2 705
@@ -6678,7 +6679,7 @@ perft 4 551042
 perft 5 17524731
 perft 6 472356665
 
-id 1
+id 742
 epd 1kbnnqrb/1pp1p1pp/r4p2/p2p4/N4P2/3P4/PPP1P1PP/RKB1NQRB w GAg - 2 9
 perft 1 21
 perft 2 623
@@ -6687,7 +6688,7 @@ perft 4 437554
 perft 5 11601134
 perft 6 343214006
 
-id 1
+id 743
 epd rbknbn1r/pppp1p1p/4p1q1/8/P1P3Pp/8/1P1PPP2/RBKNBNQR w HAha - 0 9
 perft 1 30
 perft 2 813
@@ -6696,7 +6697,7 @@ perft 4 708454
 perft 5 23379040
 perft 6 692576573
 
-id 1
+id 744
 epd rk1bb1qr/2pppppp/p2nn3/1p4P1/6QP/8/PPPPPP2/RKNBBN1R w HAha - 2 9
 perft 1 36
 perft 2 857
@@ -6705,7 +6706,7 @@ perft 4 757524
 perft 5 26485812
 perft 6 696999449
 
-id 1
+id 745
 epd rkn1bbqr/p2ppppp/2p1n3/1p6/4PP2/6PP/PPPP4/RKNNBBQR w HAha - 0 9
 perft 1 33
 perft 2 687
@@ -6714,7 +6715,7 @@ perft 4 511018
 perft 5 17101732
 perft 6 412778368
 
-id 1
+id 746
 epd rkn1bqrb/pnp1pppp/3p4/8/Pp6/1N2NP2/1PPPP1PP/RK2BQRB w GAga - 0 9
 perft 1 28
 perft 2 591
@@ -6723,7 +6724,7 @@ perft 4 406025
 perft 5 12182448
 perft 6 312575205
 
-id 1
+id 747
 epd rbk1n1br/ppp1ppqp/2n5/2Np2p1/8/2P5/PPBPPPPP/R1KN1QBR w HAha - 4 9
 perft 1 35
 perft 2 930
@@ -6732,7 +6733,7 @@ perft 4 844433
 perft 5 27160490
 perft 6 780616047
 
-id 1
+id 748
 epd rknbn1br/1ppp1ppp/p3p3/8/1q6/2P2N1P/P2PPPP1/RKNB1QBR w HAha - 0 9
 perft 1 4
 perft 2 157
@@ -6741,7 +6742,7 @@ perft 4 138102
 perft 5 3454704
 perft 6 125373395
 
-id 1
+id 749
 epd rkn1qbbr/pp3ppp/4n3/2ppp3/4P1P1/P2P4/1PP2P1P/RKNNQBBR w HAha - 0 9
 perft 1 28
 perft 2 840
@@ -6750,7 +6751,7 @@ perft 4 771328
 perft 5 23200961
 perft 6 756489357
 
-id 1
+id 750
 epd rkn1qrbb/pp1ppp2/2p1n1p1/7p/2P2P1P/6P1/PP1PP3/RKNNQRBB w FAfa - 1 9
 perft 1 32
 perft 2 867
@@ -6759,7 +6760,7 @@ perft 4 757836
 perft 5 24485663
 perft 6 688115847
 
-id 1
+id 751
 epd b1rknnrq/bpppp1p1/p6p/5p1P/6P1/4N3/PPPPPP2/BBRKN1RQ w GCgc - 1 9
 perft 1 33
 perft 2 851
@@ -6768,7 +6769,7 @@ perft 4 763967
 perft 5 26686205
 perft 6 731944177
 
-id 1
+id 752
 epd brkb1nr1/pppppp2/3n2pp/3B4/1P6/4P3/PqPP1PPP/BRK1NNRQ w GBgb - 2 9
 perft 1 4
 perft 2 98
@@ -6777,7 +6778,7 @@ perft 4 76143
 perft 5 2352530
 perft 6 64251468
 
-id 1
+id 753
 epd brk1nbrq/1ppppn1p/6p1/p4p2/P5P1/5R2/1PPPPP1P/BRKNNB1Q w Bgb - 0 9
 perft 1 29
 perft 2 922
@@ -6786,7 +6787,7 @@ perft 4 879527
 perft 5 27463717
 perft 6 888881062
 
-id 1
+id 754
 epd brkn1rqb/1p1ppppp/3n4/p1p5/1P3P2/8/PNPPP1PP/BR1KNRQB w fb - 1 9
 perft 1 29
 perft 2 633
@@ -6795,7 +6796,7 @@ perft 4 469818
 perft 5 15076198
 perft 6 396737074
 
-id 1
+id 755
 epd rb1k1nrq/pbp1pppp/1p1p1n2/8/5P2/4NN1P/PPPPP1P1/RBBK2RQ w GAga - 2 9
 perft 1 28
 perft 2 841
@@ -6804,7 +6805,7 @@ perft 4 710751
 perft 5 20772996
 perft 6 613798447
 
-id 1
+id 756
 epd rkbbnnrq/p1pp3p/4p1p1/1p3p2/P6P/1P6/1BPPPPP1/RK1BNNRQ w GAga - 0 9
 perft 1 33
 perft 2 957
@@ -6813,7 +6814,7 @@ perft 4 907217
 perft 5 29735654
 perft 6 903933626
 
-id 1
+id 757
 epd rk2nbrq/p1ppppp1/bpn5/7p/6P1/2N2P2/PPPPP1QP/RKB1NBR1 w GAga - 2 9
 perft 1 24
 perft 2 687
@@ -6822,7 +6823,7 @@ perft 4 544627
 perft 5 15518417
 perft 6 484217179
 
-id 1
+id 758
 epd rkbn1r1b/pp1pppnp/6q1/2p3p1/5P1P/4N3/PPPPP1P1/RKB1NRQB w FAfa - 1 9
 perft 1 23
 perft 2 831
@@ -6831,7 +6832,7 @@ perft 4 754622
 perft 5 21126103
 perft 6 744755212
 
-id 1
+id 759
 epd rbknb1rq/ppp1p1p1/3pnp1p/8/6PP/2PP4/PP2PP2/RBKNBNRQ w GAga - 0 9
 perft 1 31
 perft 2 838
@@ -6840,7 +6841,7 @@ perft 4 736910
 perft 5 24008129
 perft 6 677776408
 
-id 1
+id 760
 epd rknbb1rq/p1pn1ppp/4p3/1p1p4/2P5/1P2N1P1/P2PPP1P/RKNBB1RQ w GAga - 1 9
 perft 1 29
 perft 2 830
@@ -6849,7 +6850,7 @@ perft 4 721630
 perft 5 22243832
 perft 6 660040360
 
-id 1
+id 761
 epd rk1nbbrq/pp1p1ppp/3n4/P3p3/2p4P/8/1PPPPPP1/RKNNBBRQ w GAga - 1 9
 perft 1 24
 perft 2 484
@@ -6858,7 +6859,7 @@ perft 4 297419
 perft 5 8379748
 perft 6 214004367
 
-id 1
+id 762
 epd rknnbr1b/ppp2pqp/3p4/4p1p1/7P/3P1P2/PPP1P1P1/RKNNBRQB w FAfa - 0 9
 perft 1 32
 perft 2 838
@@ -6867,7 +6868,7 @@ perft 4 740701
 perft 5 23472124
 perft 6 699211365
 
-id 1
+id 763
 epd rb1k1rbq/ppppN1pp/2nn4/5p2/7P/8/PPPPPPP1/RBK1NRBQ w FA - 1 9
 perft 1 27
 perft 2 800
@@ -6876,7 +6877,7 @@ perft 4 701742
 perft 5 20804424
 perft 6 660917073
 
-id 1
+id 764
 epd r1nbnrbq/kppppp1p/6p1/8/p1PP1P2/4P3/PP4PP/RKNBNRBQ w FA - 1 9
 perft 1 28
 perft 2 757
@@ -6885,7 +6886,7 @@ perft 4 602699
 perft 5 17180857
 perft 6 507618340
 
-id 1
+id 765
 epd rkn1rbbq/p1pppppp/2n5/1pP5/8/1N2P3/PP1P1PPP/RK1NRBBQ w EAea - 1 9
 perft 1 22
 perft 2 483
@@ -6894,7 +6895,7 @@ perft 4 283679
 perft 5 7497674
 perft 6 191130942
 
-id 1
+id 766
 epd rknnrqbb/2pppppp/8/p7/Np3P2/3P4/PPP1P1PP/RKN1RQBB w EAea - 0 9
 perft 1 25
 perft 2 536
@@ -6903,7 +6904,7 @@ perft 4 339180
 perft 5 9694947
 perft 6 245669668
 
-id 1
+id 767
 epd bb1rknrn/1qppppp1/1p4B1/p6N/8/2P5/PP1PPPPP/B1QRK1RN w GDgd - 1 9
 perft 1 32
 perft 2 715
@@ -6912,7 +6913,7 @@ perft 4 575008
 perft 5 17860156
 perft 6 502410909
 
-id 1
+id 768
 epd b1rbknrn/qpp1ppp1/p6p/3p4/2P5/1P1P1P2/P3P1PP/BQRBKNRN w GCgc - 0 9
 perft 1 30
 perft 2 818
@@ -6921,7 +6922,7 @@ perft 4 688711
 perft 5 20981488
 perft 6 611986786
 
-id 1
+id 769
 epd bqkrnbrn/1pp1pp1p/p7/1B1p2p1/4P3/7P/PPPP1PP1/BQKRN1RN w - - 0 9
 perft 1 28
 perft 2 676
@@ -6930,7 +6931,7 @@ perft 4 478054
 perft 5 13126287
 perft 6 363765666
 
-id 1
+id 770
 epd bqrknrnb/1p2ppp1/p1pp3p/8/3P1P2/1PP5/P3P1PP/BQRKNRNB w FCfc - 0 9
 perft 1 31
 perft 2 646
@@ -6939,7 +6940,7 @@ perft 4 455607
 perft 5 14984618
 perft 6 349082278
 
-id 1
+id 771
 epd qbbrkn1r/pppppp1p/8/6p1/2P1Pn1P/6N1/PP1P1PP1/QBBRKNR1 w GDd - 3 9
 perft 1 20
 perft 2 532
@@ -6948,7 +6949,7 @@ perft 4 303586
 perft 5 7512432
 perft 6 202967948
 
-id 1
+id 772
 epd 1rbbknr1/p1ppp1pp/1pq2pn1/8/3P4/P3P3/QPP2PPP/1RBBKNRN w GBgb - 3 9
 perft 1 31
 perft 2 1002
@@ -6957,7 +6958,7 @@ perft 4 999607
 perft 5 30642468
 perft 6 1009228283
 
-id 1
+id 773
 epd qrbkn1rn/pppp1ppp/8/6b1/P1P1Pp2/8/1P1P2PP/QRBKNBRN w GBgb - 0 9
 perft 1 22
 perft 2 505
@@ -6966,7 +6967,7 @@ perft 4 304863
 perft 5 8192621
 perft 6 214730959
 
-id 1
+id 774
 epd qrbk1rnb/p2ppp1p/5n2/1pp3p1/8/7P/PPPPPPPN/QRBKR1NB w Bfb - 0 9
 perft 1 20
 perft 2 619
@@ -6975,7 +6976,7 @@ perft 4 449630
 perft 5 10571176
 perft 6 369603424
 
-id 1
+id 775
 epd qbrkb1r1/ppp2ppp/3pn1n1/P3p3/4P3/3P4/1PP2PPP/QBRKBNRN w GCgc - 1 9
 perft 1 26
 perft 2 755
@@ -6984,7 +6985,7 @@ perft 4 604483
 perft 5 17164382
 perft 6 510878835
 
-id 1
+id 776
 epd qrkbb1r1/ppp1pnpp/3p2n1/5p2/1P3P2/2Q3N1/P1PPP1PP/1RKBB1RN w GBgb - 0 9
 perft 1 35
 perft 2 918
@@ -6993,7 +6994,7 @@ perft 4 870888
 perft 5 30933394
 perft 6 867833733
 
-id 1
+id 777
 epd qrknbbrn/ppp1ppp1/8/7p/2Bp4/4PPP1/PPPP3P/QRKNB1RN w GBgb - 0 9
 perft 1 27
 perft 2 593
@@ -7002,7 +7003,7 @@ perft 4 376808
 perft 5 10422676
 perft 6 258348640
 
-id 1
+id 778
 epd qrk1brnb/ppppp3/4n2p/5pp1/2PP4/2N4P/PP2PPP1/QRK1BRNB w FBfb - 2 9
 perft 1 24
 perft 2 672
@@ -7011,7 +7012,7 @@ perft 4 506189
 perft 5 13765777
 perft 6 414930519
 
-id 1
+id 779
 epd qbrknrb1/p2ppppp/2p3n1/8/p4P2/6PP/1PPPP3/QBRKNRBN w FCfc - 0 9
 perft 1 29
 perft 2 759
@@ -7020,7 +7021,7 @@ perft 4 634493
 perft 5 20416668
 perft 6 584870558
 
-id 1
+id 780
 epd 1rkb1rbn/p1pp1ppp/3np3/1p6/4qP2/3NB3/PPPPPRPP/QRKB3N w Bfb - 0 9
 perft 1 22
 perft 2 923
@@ -7029,7 +7030,7 @@ perft 4 914106
 perft 5 24049880
 perft 6 957218571
 
-id 1
+id 781
 epd 1rknrbbn/p1pp1p1p/8/1p2p1p1/4qPP1/2P5/PP1PP1BP/QRKNR1BN w EBeb - 0 9
 perft 1 28
 perft 2 1309
@@ -7038,7 +7039,7 @@ perft 4 1568968
 perft 5 44576409
 perft 6 1846382333
 
-id 1
+id 782
 epd qrk1rn1b/ppppp2p/4n3/3b1pp1/4P2P/5BP1/PPPP1P2/QRKNRNB1 w EBeb - 3 9
 perft 1 26
 perft 2 839
@@ -7047,7 +7048,7 @@ perft 4 726354
 perft 5 19978260
 perft 6 661207281
 
-id 1
+id 783
 epd bbrqk1rn/pp1ppppp/8/2p5/2P1P3/5n1P/PPBP1PP1/B1RQKNRN w GCgc - 1 9
 perft 1 3
 perft 2 95
@@ -7056,7 +7057,7 @@ perft 4 85038
 perft 5 2518864
 perft 6 80775549
 
-id 1
+id 784
 epd brqbk2n/pppppprp/8/6p1/1P3n2/5P2/P1PPP1PP/R1QBKNRN w Gb - 2 9
 perft 1 22
 perft 2 593
@@ -7065,7 +7066,7 @@ perft 4 362760
 perft 5 8922397
 perft 6 253271592
 
-id 1
+id 785
 epd brqknbr1/pp3ppp/3p2n1/2p1p3/2P5/5P2/PPKPP1PP/BRQ1NBRN w gb - 0 9
 perft 1 21
 perft 2 590
@@ -7074,7 +7075,7 @@ perft 4 397355
 perft 5 9581695
 perft 6 304103516
 
-id 1
+id 786
 epd 1rqknrnb/2pp1ppp/p3p3/1p6/P2P4/5bP1/1PP1PP1P/BRQKNRNB w FBfb - 0 9
 perft 1 24
 perft 2 737
@@ -7083,7 +7084,7 @@ perft 4 598439
 perft 5 17948681
 perft 6 536330341
 
-id 1
+id 787
 epd rbb1k1rn/p1pqpppp/6n1/1p1p4/5P2/3PP3/PPP1K1PP/RBBQ1NRN w ga - 3 9
 perft 1 24
 perft 2 694
@@ -7092,7 +7093,7 @@ perft 4 513782
 perft 5 13094823
 perft 6 419402704
 
-id 1
+id 788
 epd rqbbknr1/1ppp2pp/p5n1/4pp2/P7/1PP5/1Q1PPPPP/R1BBKNRN w GAga - 0 9
 perft 1 24
 perft 2 600
@@ -7101,7 +7102,7 @@ perft 4 408207
 perft 5 11029596
 perft 6 308553169
 
-id 1
+id 789
 epd rqbknbrn/2pppppp/6Q1/pp6/8/2P5/PP1PPPPP/R1BKNBRN w GAga - 2 9
 perft 1 40
 perft 2 949
@@ -7110,7 +7111,7 @@ perft 4 889887
 perft 5 31296485
 perft 6 881529007
 
-id 1
+id 790
 epd rqbknr1b/pp1ppp2/2p2n1p/6p1/8/3P1PPP/PPP1P3/RQBKNRNB w FAfa - 0 9
 perft 1 20
 perft 2 560
@@ -7119,7 +7120,7 @@ perft 4 373921
 perft 5 8687544
 perft 6 277906201
 
-id 1
+id 791
 epd rbqkbnrn/p3pppp/1p6/3p4/P1p3P1/1P6/1QPPPP1P/RB1KBNRN w GAga - 0 9
 perft 1 30
 perft 2 1155
@@ -7128,7 +7129,7 @@ perft 4 1351455
 perft 5 43092716
 perft 6 1614019629
 
-id 1
+id 792
 epd rqkbb1rn/p1p1pppn/1p1p4/7p/4PP2/7P/PPPPB1P1/RQK1BNRN w GAga - 1 9
 perft 1 30
 perft 2 701
@@ -7137,7 +7138,7 @@ perft 4 515942
 perft 5 15450970
 perft 6 401499189
 
-id 1
+id 793
 epd rqknbbrn/1p2pp1p/3p2p1/p1p5/P2P4/1P6/1KP1PPPP/RQ1NBBRN w ga - 0 9
 perft 1 28
 perft 2 756
@@ -7146,7 +7147,7 @@ perft 4 610320
 perft 5 17989811
 perft 6 525585996
 
-id 1
+id 794
 epd rqknbrnb/1pp3pp/5p2/p2pp3/P7/3PPN2/1PP2PPP/RQKNBR1B w FAfa - 0 9
 perft 1 26
 perft 2 731
@@ -7155,7 +7156,7 @@ perft 4 550395
 perft 5 15209404
 perft 6 439767476
 
-id 1
+id 795
 epd rbqkr1bn/p1pppp1p/1p1n4/6p1/7P/3P1PP1/PPP1P3/RBQKNRBN w FAa - 0 9
 perft 1 27
 perft 2 586
@@ -7164,7 +7165,7 @@ perft 4 381604
 perft 5 10905865
 perft 6 274364342
 
-id 1
+id 796
 epd rqk1nrb1/ppbp1ppp/4p1n1/2p5/7P/1PP5/P2PPPP1/RQKBNRBN w FAfa - 1 9
 perft 1 27
 perft 2 749
@@ -7173,7 +7174,7 @@ perft 4 602318
 perft 5 18084787
 perft 6 520547029
 
-id 1
+id 797
 epd rqknrbbn/pp1p1ppp/4p3/2p5/3P2P1/7P/PPP1PP2/RQKNRBBN w EAa - 0 9
 perft 1 20
 perft 2 533
@@ -7182,7 +7183,7 @@ perft 4 336248
 perft 5 8230417
 perft 6 245871540
 
-id 1
+id 798
 epd rqknrnbb/pp1ppp1p/2p3p1/8/8/1P2P1NP/P1PP1PP1/RQKNR1BB w EAea - 0 9
 perft 1 22
 perft 2 633
@@ -7191,7 +7192,7 @@ perft 4 441877
 perft 5 10827868
 perft 6 343525739
 
-id 1
+id 799
 epd 1brkq1rn/2pppppp/1p2n3/p2bN3/8/7P/PPPPPPP1/BBRKQ1RN w GCgc - 2 9
 perft 1 27
 perft 2 748
@@ -7200,7 +7201,7 @@ perft 4 580054
 perft 5 16010135
 perft 6 475206624
 
-id 1
+id 800
 epd brkbqnrn/2pp1ppp/8/1p2p3/Pp2N3/8/2PPPPPP/BRKBQNR1 w GBgb - 0 9
 perft 1 30
 perft 2 827
@@ -7209,7 +7210,7 @@ perft 4 757837
 perft 5 23746165
 perft 6 751690068
 
-id 1
+id 801
 epd brk1nbrn/pp1ppppp/2p5/7P/5P2/q2P4/PPP1P1P1/BRKQNBRN w GBgb - 1 9
 perft 1 15
 perft 2 471
@@ -7218,7 +7219,7 @@ perft 4 276424
 perft 5 5960901
 perft 6 190316951
 
-id 1
+id 802
 epd brkqnrnb/1p1pp1p1/p4p2/2p4p/8/P2PP3/1PP1QPPP/BRK1NRNB w FBfb - 0 9
 perft 1 24
 perft 2 479
@@ -7227,7 +7228,7 @@ perft 4 280081
 perft 5 7830230
 perft 6 190419716
 
-id 1
+id 803
 epd rbbkqnrn/2ppp2p/pp3p2/6p1/P6P/8/RPPPPPP1/1BBKQNRN w Gga - 0 9
 perft 1 21
 perft 2 523
@@ -7236,7 +7237,7 @@ perft 4 328733
 perft 5 8322614
 perft 6 242240658
 
-id 1
+id 804
 epd rkbbqr1n/1ppppppn/7p/p7/4P3/2P2P2/PP1PB1PP/RKB1QNRN w GAa - 3 9
 perft 1 27
 perft 2 563
@@ -7245,7 +7246,7 @@ perft 4 372148
 perft 5 11105151
 perft 6 283211800
 
-id 1
+id 805
 epd rkbqnbrn/ppppp3/8/5ppp/2P3P1/7P/PPQPPP2/RKB1NBRN w GAga - 0 9
 perft 1 28
 perft 2 639
@@ -7254,7 +7255,7 @@ perft 4 469250
 perft 5 14872172
 perft 6 384663405
 
-id 1
+id 806
 epd rkb1nrnb/pppp1pp1/5q1p/8/P3p3/4R1P1/1PPPPP1P/1KBQNRNB w Ffa - 0 9
 perft 1 28
 perft 2 873
@@ -7263,7 +7264,7 @@ perft 4 720814
 perft 5 20209424
 perft 6 625281937
 
-id 1
+id 807
 epd rbkqb1rn/1p1ppppp/4n3/p1p5/8/3PBP2/PPP1P1PP/RBKQ1NRN w GAga - 0 9
 perft 1 26
 perft 2 798
@@ -7272,7 +7273,7 @@ perft 4 667496
 perft 5 18475618
 perft 6 591681956
 
-id 1
+id 808
 epd rk1qbnrn/1p1ppppp/1b6/p1p5/P7/2P3NP/1P1PPPP1/RKQBB1RN w GAga - 0 9
 perft 1 22
 perft 2 506
@@ -7281,7 +7282,7 @@ perft 4 301029
 perft 5 7891676
 perft 6 205739580
 
-id 1
+id 809
 epd rk1nbbrn/ppp1ppp1/8/3p3p/1P1P2q1/5PB1/P1P1P1PP/RKQN1BRN w GAga - 1 9
 perft 1 31
 perft 2 956
@@ -7290,7 +7291,7 @@ perft 4 903799
 perft 5 27827461
 perft 6 876341492
 
-id 1
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 perft 1 31
 perft 2 750
@@ -7299,7 +7300,7 @@ perft 4 646252
 perft 5 21639104
 perft 6 617064197
 
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 perft 1 26
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@@ -7308,7 +7309,7 @@ perft 4 465119
 perft 5 13643783
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 perft 1 24
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@@ -7317,7 +7318,7 @@ perft 4 371597
 perft 5 10066892
 perft 6 271121237
 
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@@ -7326,7 +7327,7 @@ perft 4 340734
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@@ -7335,7 +7336,7 @@ perft 4 566572
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@@ -7344,7 +7345,7 @@ perft 4 394705
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 perft 1 30
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@@ -7353,7 +7354,7 @@ perft 4 621332
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@@ -7362,7 +7363,7 @@ perft 4 352883
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@@ -7371,7 +7372,7 @@ perft 4 764915
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@@ -7380,7 +7381,7 @@ perft 4 378883
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@@ -7389,7 +7390,7 @@ perft 4 488740
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@@ -7398,7 +7399,7 @@ perft 4 401483
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@@ -7407,7 +7408,7 @@ perft 4 645200
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@@ -7416,7 +7417,7 @@ perft 4 1374158
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@@ -7434,7 +7435,7 @@ perft 4 593155
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@@ -7443,7 +7444,7 @@ perft 4 460663
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@@ -7452,7 +7453,7 @@ perft 4 1011922
 perft 5 35946987
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@@ -7461,7 +7462,7 @@ perft 4 610557
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@@ -7470,7 +7471,7 @@ perft 4 568788
 perft 5 16461795
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@@ -7479,7 +7480,7 @@ perft 4 700453
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@@ -7488,7 +7489,7 @@ perft 4 671112
 perft 5 20532790
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@@ -7497,7 +7498,7 @@ perft 4 555622
 perft 5 15156662
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@@ -7506,7 +7507,7 @@ perft 4 655019
 perft 5 22852433
 perft 6 577223409
 
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 perft 5 10687843
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 perft 1 20
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@@ -7524,7 +7525,7 @@ perft 4 275250
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 perft 5 8671852
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@@ -7551,7 +7552,7 @@ perft 4 741972
 perft 5 20276176
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 perft 1 24
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@@ -7560,7 +7561,7 @@ perft 4 322175
 perft 5 9054028
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-id 1
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 perft 1 26
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@@ -7569,7 +7570,7 @@ perft 4 559186
 perft 5 14697705
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-id 1
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@@ -7578,7 +7579,7 @@ perft 4 345070
 perft 5 10223443
 perft 6 248715580
 
-id 1
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-id 1
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-id 1
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 perft 5 16453359
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-id 1
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-id 1
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-id 1
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@@ -7785,7 +7786,7 @@ perft 4 293824
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-id 1
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@@ -7794,7 +7795,7 @@ perft 4 396423
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-id 1
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@@ -7803,7 +7804,7 @@ perft 4 1276664
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-id 1
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@@ -7812,7 +7813,7 @@ perft 4 392131
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-id 1
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@@ -7830,7 +7831,7 @@ perft 4 257776
 perft 5 5679073
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-id 1
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@@ -7839,7 +7840,7 @@ perft 4 562201
 perft 5 19486022
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-id 1
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 perft 5 25176664
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-id 1
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 perft 5 48216013
 perft 6 1522548864
 
-id 1
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@@ -7866,7 +7867,7 @@ perft 4 242892
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-id 1
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 perft 1 29
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@@ -7875,7 +7876,7 @@ perft 4 529810
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 perft 6 419552571
 
-id 1
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 perft 1 23
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 perft 5 10747407
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-id 1
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@@ -7893,7 +7894,7 @@ perft 4 846839
 perft 5 23063284
 perft 6 807913585
 
-id 1
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 perft 1 30
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@@ -7902,7 +7903,7 @@ perft 4 345172
 perft 5 10976745
 perft 6 251694423
 
-id 1
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@@ -7911,7 +7912,7 @@ perft 4 562015
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 perft 6 479400272
 
-id 1
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@@ -7920,7 +7921,7 @@ perft 4 546215
 perft 5 13676371
 perft 6 470796854
 
-id 1
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 epd brqbkrnn/1pp2p1p/3pp1p1/p5N1/8/1P6/P1PPPPPP/BRQBK1RN w Bfb - 0 9
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@@ -7929,7 +7930,7 @@ perft 4 505618
 perft 5 16639723
 perft 6 402140795
 
-id 1
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 epd br1krb1n/2qppppp/pp3n2/8/1P4P1/8/P1PPPP1P/1RQKRBNN w EBeb - 0 9
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@@ -7938,7 +7939,7 @@ perft 4 926427
 perft 5 25019636
 perft 6 959651619
 
-id 1
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 epd brqkr1nb/2ppp1pp/1p2np2/p7/2P1PN2/8/PP1P1PPP/BRQKRN1B w EBeb - 0 9
 perft 1 28
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@@ -7947,7 +7948,7 @@ perft 4 504128
 perft 5 15516491
 perft 6 417396563
 
-id 1
+id 883
 epd rbbqkrnn/3pppp1/p7/1pp4p/2P1P2P/8/PP1P1PP1/RBBQKRNN w FAfa - 0 9
 perft 1 26
 perft 2 671
@@ -7956,7 +7957,7 @@ perft 4 496806
 perft 5 14072641
 perft 6 404960259
 
-id 1
+id 884
 epd rqbbkr1n/pp1p1p1p/4pn2/2p3p1/4P1P1/3P3P/PPP2P2/RQBBKRNN w FAfa - 0 9
 perft 1 22
 perft 2 633
@@ -7965,7 +7966,7 @@ perft 4 441809
 perft 5 10776416
 perft 6 335689685
 
-id 1
+id 885
 epd rqbkrbnn/p1ppp3/1p3pp1/7p/3P4/P1P5/1PQ1PPPP/R1BKRBNN w EAea - 0 9
 perft 1 32
 perft 2 607
@@ -7974,7 +7975,7 @@ perft 4 454319
 perft 5 15586203
 perft 6 383515709
 
-id 1
+id 886
 epd rqbkrnn1/pp2ppbp/3p4/2p3p1/2P5/1P3N1P/P2PPPP1/RQBKRN1B w EAea - 1 9
 perft 1 29
 perft 2 943
@@ -7983,7 +7984,7 @@ perft 4 908740
 perft 5 28761841
 perft 6 907579129
 
-id 1
+id 887
 epd rbqkb1nn/1ppppr1p/p5p1/5p2/1P6/2P4P/P1KPPPP1/RBQ1BRNN w a - 1 9
 perft 1 22
 perft 2 441
@@ -7992,7 +7993,7 @@ perft 4 231273
 perft 5 5784206
 perft 6 140934555
 
-id 1
+id 888
 epd rqkb1rnn/1pp1pp1p/p5p1/1b1p4/3P4/P5P1/RPP1PP1P/1QKBBRNN w Ffa - 1 9
 perft 1 21
 perft 2 505
@@ -8001,7 +8002,7 @@ perft 4 290897
 perft 5 7147063
 perft 6 188559137
 
-id 1
+id 889
 epd rq1rbbnn/pkp1ppp1/3p3p/1p2N1P1/8/8/PPPPPP1P/RQKRBB1N w DA - 0 9
 perft 1 27
 perft 2 608
@@ -8010,7 +8011,7 @@ perft 4 387751
 perft 5 10808908
 perft 6 268393274
 
-id 1
+id 890
 epd rqkrb2b/p2ppppp/2p3nn/1p6/5P2/PP1P4/2P1P1PP/RQKRBNNB w DAda - 1 9
 perft 1 30
 perft 2 749
@@ -8019,7 +8020,7 @@ perft 4 581531
 perft 5 16916813
 perft 6 485406712
 
-id 1
+id 891
 epd rbqkr1bn/pp1ppp2/2p1n2p/6p1/8/4BPNP/PPPPP1P1/RBQKRN2 w EAea - 0 9
 perft 1 23
 perft 2 600
@@ -8028,7 +8029,7 @@ perft 4 410057
 perft 5 11041820
 perft 6 314327867
 
-id 1
+id 892
 epd rqkbrnb1/2ppp1pp/pp3pn1/8/5P2/B2P4/PPP1P1PP/RQKBRN1N w EAea - 2 9
 perft 1 22
 perft 2 569
@@ -8037,7 +8038,7 @@ perft 4 371471
 perft 5 9395816
 perft 6 269460607
 
-id 1
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 epd rqkrnbb1/p1p1pppp/1p4n1/3p4/7P/P3P3/1PPPBPP1/RQKRN1BN w DAda - 0 9
 perft 1 27
 perft 2 579
@@ -8046,7 +8047,7 @@ perft 4 373079
 perft 5 10238486
 perft 6 266047417
 
-id 1
+id 894
 epd rqkrn1bb/p1ppp1pp/4n3/1p6/6p1/4N3/PPPPPPPP/RQKR2BB w DAda - 0 9
 perft 1 20
 perft 2 462
@@ -8055,7 +8056,7 @@ perft 4 274162
 perft 5 6563859
 perft 6 193376359
 
-id 1
+id 895
 epd bbrkqr2/pppp1ppp/6nn/8/2P1p3/3PP2N/PP3PPP/BBRKQR1N w FCfc - 0 9
 perft 1 28
 perft 2 724
@@ -8064,7 +8065,7 @@ perft 4 619064
 perft 5 19318355
 perft 6 593204629
 
-id 1
+id 896
 epd brk1qrnn/1pppbppp/4p3/8/1p6/P1P4P/3PPPP1/BRKBQRNN w FBfb - 1 9
 perft 1 24
 perft 2 662
@@ -8073,7 +8074,7 @@ perft 4 468215
 perft 5 12610387
 perft 6 355969349
 
-id 1
+id 897
 epd 1r1qrbnn/p1pkpppp/1p1p4/8/3P1PP1/P4b2/1PP1P2P/BRKQRBNN w EB - 1 9
 perft 1 22
 perft 2 696
@@ -8082,7 +8083,7 @@ perft 4 510247
 perft 5 13697382
 perft 6 401903030
 
-id 1
+id 898
 epd 1rkqrnnb/p1p1p1pp/1p1p4/3b1p1N/4P3/5N2/PPPP1PPP/BRKQR2B w EBeb - 1 9
 perft 1 29
 perft 2 887
@@ -8091,7 +8092,7 @@ perft 4 816176
 perft 5 26051242
 perft 6 791718847
 
-id 1
+id 899
 epd rbbkq1rn/pppppppp/7n/8/P7/3P3P/1PPKPPP1/RBB1QRNN w a - 3 9
 perft 1 22
 perft 2 417
@@ -8100,7 +8101,7 @@ perft 4 216855
 perft 5 5505063
 perft 6 134818483
 
-id 1
+id 900
 epd rkbbqr1n/1p1pppp1/2p2n2/p4NBp/8/3P4/PPP1PPPP/RK1BQRN1 w FAfa - 0 9
 perft 1 37
 perft 2 832
@@ -8109,7 +8110,7 @@ perft 4 728154
 perft 5 26676373
 perft 6 673756141
 
-id 1
+id 901
 epd rkbqrb1n/3pBppp/ppp2n2/8/8/P2P4/1PP1PPPP/RK1QRBNN w EAea - 0 9
 perft 1 28
 perft 2 685
@@ -8118,7 +8119,7 @@ perft 4 543069
 perft 5 16033316
 perft 6 482288814
 
-id 1
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 epd rkb1rn1b/ppppqppp/4p3/8/1P2n1P1/5Q2/P1PP1P1P/RKB1RNNB w EAea - 2 9
 perft 1 37
 perft 2 1158
@@ -8127,7 +8128,7 @@ perft 4 1234768
 perft 5 44672979
 perft 6 1389312729
 
-id 1
+id 903
 epd r1kqbrnn/pp1pp1p1/7p/2P2p2/5b2/3P4/P1P1P1PP/RBKQBRNN w FAfa - 0 9
 perft 1 5
 perft 2 161
@@ -8136,7 +8137,7 @@ perft 4 154885
 perft 5 4734999
 perft 6 157499039
 
-id 1
+id 904
 epd rkqbbr1n/ppp1ppp1/8/Q2p3p/4n3/3P1P2/PPP1P1PP/RK1BBRNN w FAfa - 2 9
 perft 1 38
 perft 2 1144
@@ -8145,7 +8146,7 @@ perft 4 1236877
 perft 5 43832975
 perft 6 1366087771
 
-id 1
+id 905
 epd rkqrbbn1/p1ppppp1/Bp5p/8/P6n/2P1P3/1P1P1PPP/RKQRB1NN w DAda - 0 9
 perft 1 28
 perft 2 551
@@ -8154,7 +8155,7 @@ perft 4 350861
 perft 5 9944107
 perft 6 251179183
 
-id 1
+id 906
 epd rkqrb1nb/1ppp1ppp/p7/4p3/5n2/3P2N1/PPPQPPPP/RK1RB1NB w DAda - 0 9
 perft 1 26
 perft 2 690
@@ -8163,7 +8164,7 @@ perft 4 513628
 perft 5 15965907
 perft 6 418191735
 
-id 1
+id 907
 epd rbkqrnbn/pppp1p2/4p1p1/7p/7P/P2P4/BPP1PPP1/R1KQRNBN w EAea - 0 9
 perft 1 27
 perft 2 515
@@ -8172,7 +8173,7 @@ perft 4 309727
 perft 5 8792550
 perft 6 218658292
 
-id 1
+id 908
 epd rkqbrnbn/pp1ppp2/8/2p3p1/P1P4p/5P2/1PKPP1PP/R1QBRNBN w ea - 0 9
 perft 1 27
 perft 2 627
@@ -8181,7 +8182,7 @@ perft 4 431101
 perft 5 11978698
 perft 6 328434174
 
-id 1
+id 909
 epd rkqrnbbn/1p2pp1p/3p2p1/p1p5/P5PP/3N4/1PPPPP2/RKQR1BBN w DAda - 0 9
 perft 1 23
 perft 2 624
@@ -8190,7 +8191,7 @@ perft 4 451860
 perft 5 11960861
 perft 6 367311176
 
-id 1
+id 910
 epd rk2rnbb/ppqppppp/2pn4/8/1P3P2/6P1/P1PPP1NP/RKQR1NBB w DAa - 1 9
 perft 1 27
 perft 2 727
@@ -8199,7 +8200,7 @@ perft 4 581003
 perft 5 16633696
 perft 6 505212747
 
-id 1
+id 911
 epd b1krrqnn/pp1ppp1p/2p3p1/8/P3Pb1P/1P6/2PP1PP1/BBRKRQNN w EC - 0 9
 perft 1 32
 perft 2 943
@@ -8208,7 +8209,7 @@ perft 4 865229
 perft 5 28672582
 perft 6 800922511
 
-id 1
+id 912
 epd 1rkbrqnn/p1pp1ppp/1p6/8/P2Pp3/8/1PPKPPQP/BR1BR1NN w eb - 0 9
 perft 1 28
 perft 2 916
@@ -8217,7 +8218,7 @@ perft 4 817624
 perft 5 22840279
 perft 6 759318058
 
-id 1
+id 913
 epd brkrqb1n/1pppp1pp/p7/3n1p2/P5P1/3PP3/1PP2P1P/BRKRQBNN w DBdb - 0 9
 perft 1 27
 perft 2 669
@@ -8226,7 +8227,7 @@ perft 4 484259
 perft 5 13956472
 perft 6 380267099
 
-id 1
+id 914
 epd brkrqnnb/3pppp1/1p6/p1p4p/2P3P1/6N1/PP1PPP1P/BRKRQ1NB w DBdb - 0 9
 perft 1 29
 perft 2 699
@@ -8235,7 +8236,7 @@ perft 4 512639
 perft 5 15093909
 perft 6 406594531
 
-id 1
+id 915
 epd r1bkrq1n/pp2pppp/3b1n2/2pp2B1/6P1/3P1P2/PPP1P2P/RB1KRQNN w EAea - 2 9
 perft 1 27
 perft 2 835
@@ -8244,7 +8245,7 @@ perft 4 713550
 perft 5 19867800
 perft 6 631209313
 
-id 1
+id 916
 epd rk1brq1n/p1p1pppp/3p1n2/1p3b2/4P3/2NQ4/PPPP1PPP/RKBBR2N w EAea - 4 9
 perft 1 36
 perft 2 1004
@@ -8253,7 +8254,7 @@ perft 4 979608
 perft 5 35143142
 perft 6 966310885
 
-id 1
+id 917
 epd rkbrqbnn/1p2ppp1/B1p5/p2p3p/4P2P/8/PPPP1PP1/RKBRQ1NN w DAda - 0 9
 perft 1 27
 perft 2 748
@@ -8262,7 +8263,7 @@ perft 4 597819
 perft 5 17597073
 perft 6 515304215
 
-id 1
+id 918
 epd rkbrqn1b/pp1pp1pp/2p2p2/5n2/8/2P2P2/PP1PP1PP/RKBRQ1NB w DAda - 0 9
 perft 1 20
 perft 2 479
@@ -8271,7 +8272,7 @@ perft 4 266446
 perft 5 6253775
 perft 6 167767913
 
-id 1
+id 919
 epd rbkrbnn1/ppppp1pp/5q2/5p2/5P2/P3P2N/1PPP2PP/RBKRBQ1N w DAda - 3 9
 perft 1 28
 perft 2 947
@@ -8280,7 +8281,7 @@ perft 4 876068
 perft 5 26007841
 perft 6 838704143
 
-id 1
+id 920
 epd rkr1bqnn/1ppp1p1p/p5p1/4p3/3PP2b/2P2P2/PP4PP/RKRBBQNN w CAca - 0 9
 perft 1 31
 perft 2 1004
@@ -8289,7 +8290,7 @@ perft 4 1006830
 perft 5 32688124
 perft 6 1024529879
 
-id 1
+id 921
 epd rkrqbbnn/pppp3p/8/4ppp1/1PP4P/8/P2PPPP1/RKRQBBNN w CAca - 0 9
 perft 1 24
 perft 2 717
@@ -8298,7 +8299,7 @@ perft 4 564137
 perft 5 15844525
 perft 6 484884485
 
-id 1
+id 922
 epd rkrqbn1b/pppp2pp/8/4pp2/1P1P2n1/5N2/P1P1PP1P/RKRQBN1B w CAca - 0 9
 perft 1 25
 perft 2 718
@@ -8307,7 +8308,7 @@ perft 4 587666
 perft 5 17257753
 perft 6 537354146
 
-id 1
+id 923
 epd rbkrqnbn/p1p1ppp1/1p1p4/8/3PP2p/2PB4/PP3PPP/R1KRQNBN w DAda - 0 9
 perft 1 30
 perft 2 754
@@ -8316,7 +8317,7 @@ perft 4 611322
 perft 5 19338246
 perft 6 532603566
 
-id 1
+id 924
 epd 1krbqnbn/1p2pppp/r1pp4/p7/8/1P1P2PP/P1P1PP2/RKRBQNBN w CAc - 0 9
 perft 1 21
 perft 2 566
@@ -8325,7 +8326,7 @@ perft 4 375128
 perft 5 9700847
 perft 6 279864836
 
-id 1
+id 925
 epd rkrq1b2/pppppppb/3n2np/2N5/4P3/7P/PPPP1PP1/RKRQ1BBN w CAca - 1 9
 perft 1 33
 perft 2 654
@@ -8334,7 +8335,7 @@ perft 4 479678
 perft 5 15990307
 perft 6 382218272
 
-id 1
+id 926
 epd rkr1nnbb/ppp2p1p/3p1qp1/4p3/P5P1/3PN3/1PP1PP1P/RKRQN1BB w CAca - 1 9
 perft 1 28
 perft 2 715
@@ -8343,7 +8344,7 @@ perft 4 555328
 perft 5 16303092
 perft 6 468666425
 
-id 1
+id 927
 epd bbrkrnqn/1p1ppppp/8/8/p2pP3/PP6/2P2PPP/BBRKRNQN w ECec - 0 9
 perft 1 24
 perft 2 757
@@ -8352,7 +8353,7 @@ perft 4 603231
 perft 5 15957628
 perft 6 509307623
 
-id 1
+id 928
 epd brkbrnqn/ppp2p2/4p3/P2p2pp/6P1/5P2/1PPPP2P/BRKBRNQN w EBeb - 0 9
 perft 1 25
 perft 2 548
@@ -8361,7 +8362,7 @@ perft 4 348259
 perft 5 9688526
 perft 6 247750144
 
-id 1
+id 929
 epd brkr1bqn/1pppppp1/3n3p/1p6/P7/4P1P1/1PPP1P1P/BRKRN1QN w DBdb - 0 9
 perft 1 19
 perft 2 359
@@ -8370,7 +8371,7 @@ perft 4 157099
 perft 5 3521652
 perft 6 81787718
 
-id 1
+id 930
 epd brkr1qnb/pppp2pp/2B1p3/5p2/2n5/6PP/PPPPPPN1/BRKR1QN1 w DBdb - 1 9
 perft 1 27
 perft 2 854
@@ -8379,7 +8380,7 @@ perft 4 741626
 perft 5 20558538
 perft 6 667089231
 
-id 1
+id 931
 epd rbbkrnqn/p1p1p1pp/8/1p1p4/1P1Pp3/6N1/P1P2PPP/RBBKRNQ1 w EAea - 0 9
 perft 1 28
 perft 2 723
@@ -8388,7 +8389,7 @@ perft 4 514440
 perft 5 14621108
 perft 6 397454100
 
-id 1
+id 932
 epd rkbbrn1n/pppppp2/5q1p/6p1/3P3P/4P3/PPP2PP1/RKBBRNQN w EAea - 1 9
 perft 1 25
 perft 2 741
@@ -8397,7 +8398,7 @@ perft 4 585198
 perft 5 15605840
 perft 6 485037906
 
-id 1
+id 933
 epd rkbr1bq1/ppnppppp/6n1/2p5/2P1N2P/8/PP1PPPP1/RKBRNBQ1 w DAda - 3 9
 perft 1 24
 perft 2 547
@@ -8406,7 +8407,7 @@ perft 4 339497
 perft 5 9410221
 perft 6 234041078
 
-id 1
+id 934
 epd 1kbrnqnb/r1ppppp1/8/pp5p/8/1P1NP3/P1PP1PPP/RKB1RQNB w Ad - 2 9
 perft 1 26
 perft 2 618
@@ -8415,7 +8416,7 @@ perft 4 442643
 perft 5 13112297
 perft 6 357030697
 
-id 1
+id 935
 epd rbkrb1qn/1pp1ppp1/3pn2p/pP6/8/4N1P1/P1PPPP1P/RBKRB1QN w DAda - 0 9
 perft 1 21
 perft 2 544
@@ -8424,7 +8425,7 @@ perft 4 338832
 perft 5 8381483
 perft 6 236013157
 
-id 1
+id 936
 epd rkrbbnqn/ppppp3/5p2/6pp/5PBP/4P3/PPPP2P1/RKR1BNQN w CAca - 0 9
 perft 1 30
 perft 2 891
@@ -8433,7 +8434,7 @@ perft 4 764356
 perft 5 21894752
 perft 6 669256602
 
-id 1
+id 937
 epd rkr1bb1n/ppppp1pp/5p2/4n3/3QP3/5P2/RPPP2PP/1KRNBB1N w Cca - 1 9
 perft 1 45
 perft 2 1172
@@ -8442,7 +8443,7 @@ perft 4 1332060
 perft 5 57856784
 perft 6 1501852662
 
-id 1
+id 938
 epd rkr1bqnb/pp1ppppp/8/2pN4/1P6/5N2/P1PPnPPP/RKR1BQ1B w CAca - 0 9
 perft 1 28
 perft 2 730
@@ -8451,7 +8452,7 @@ perft 4 559167
 perft 5 16323242
 perft 6 463032124
 
-id 1
+id 939
 epd rbkrnqb1/2ppppp1/p5np/1p6/8/3N4/PPPPPPPP/RBKRQNB1 w DAda - 2 9
 perft 1 20
 perft 2 417
@@ -8460,7 +8461,7 @@ perft 4 217390
 perft 5 5180716
 perft 6 133936564
 
-id 1
+id 940
 epd rkrbnqb1/p1pppnpp/5p2/1p6/2P5/1P1P1N2/P3PPPP/RKRB1QBN w CAca - 0 9
 perft 1 25
 perft 2 546
@@ -8469,7 +8470,7 @@ perft 4 330316
 perft 5 8813781
 perft 6 222026485
 
-id 1
+id 941
 epd rkr1qbbn/ppppppp1/4n3/7p/8/P7/KPPPPPPP/R1RNQBBN w ca - 0 9
 perft 1 22
 perft 2 484
@@ -8478,7 +8479,7 @@ perft 4 267495
 perft 5 6633319
 perft 6 163291279
 
-id 1
+id 942
 epd rkrnqnb1/1ppppp2/p5p1/7p/8/P1bPP3/1PP1QPPP/RKRN1NBB w CAca - 0 9
 perft 1 22
 perft 2 636
@@ -8487,7 +8488,7 @@ perft 4 441001
 perft 5 11614241
 perft 6 331083405
 
-id 1
+id 943
 epd b2krn1q/p1rppppp/1Q3n2/2p1b3/1P4P1/8/P1PPPP1P/BBRKRNN1 w ECe - 3 9
 perft 1 36
 perft 2 1192
@@ -8496,7 +8497,7 @@ perft 4 1406795
 perft 5 50382104
 perft 6 1650202838
 
-id 1
+id 944
 epd brkbrnn1/pp1pppp1/7q/2p5/6Pp/4P1NP/PPPP1P2/BRKBR1NQ w EBeb - 2 9
 perft 1 30
 perft 2 978
@@ -8505,7 +8506,7 @@ perft 4 942398
 perft 5 29205057
 perft 6 936568065
 
-id 1
+id 945
 epd brkrnb1q/pp1p1ppp/2p1p3/5n2/1P6/5N1N/P1PPPPPP/BRKR1B1Q w DBdb - 1 9
 perft 1 31
 perft 2 897
@@ -8514,7 +8515,7 @@ perft 4 810187
 perft 5 25423729
 perft 6 755334868
 
-id 1
+id 946
 epd brkr1nqb/pp1p1pp1/2pn3p/P3p3/4P3/6P1/1PPP1P1P/BRKRNNQB w DBdb - 0 9
 perft 1 19
 perft 2 382
@@ -8523,7 +8524,7 @@ perft 4 182292
 perft 5 4232274
 perft 6 103537333
 
-id 1
+id 947
 epd r1bkrn1q/ppbppppp/5n2/2p5/3P4/P6N/1PP1PPPP/RBBKRNQ1 w EAea - 3 9
 perft 1 27
 perft 2 822
@@ -8532,7 +8533,7 @@ perft 4 678880
 perft 5 19115128
 perft 6 578210135
 
-id 1
+id 948
 epd rkbbrnnq/pp2pppp/8/2pp4/P1P5/1P3P2/3PP1PP/RKBBRNNQ w EAea - 1 9
 perft 1 23
 perft 2 643
@@ -8541,7 +8542,7 @@ perft 4 442070
 perft 5 11170489
 perft 6 329615708
 
-id 1
+id 949
 epd rkbr1b1q/p1pppppp/1p1n4/7n/5QP1/3N4/PPPPPP1P/RKBR1BN1 w DAda - 4 9
 perft 1 37
 perft 2 943
@@ -8550,7 +8551,7 @@ perft 4 880474
 perft 5 31568111
 perft 6 842265141
 
-id 1
+id 950
 epd rkbr1nqb/pppp2np/8/4ppp1/1P6/6N1/P1PPPPPP/RKBRN1QB w DAda - 1 9
 perft 1 23
 perft 2 574
@@ -8559,7 +8560,7 @@ perft 4 362306
 perft 5 9020291
 perft 6 261247606
 
-id 1
+id 951
 epd rbkr1nnq/p1p1pp1p/1p4p1/3p4/b3P3/4N3/PPPPNPPP/RBKRB1Q1 w DAda - 0 9
 perft 1 26
 perft 2 900
@@ -8568,7 +8569,7 @@ perft 4 805006
 perft 5 21653203
 perft 6 745802405
 
-id 1
+id 952
 epd rkrbb1nq/p2pppp1/1p4n1/2p4p/3N4/4P1P1/PPPP1P1P/RKRBBN1Q w CAca - 0 9
 perft 1 32
 perft 2 697
@@ -8577,7 +8578,7 @@ perft 4 531121
 perft 5 17150175
 perft 6 441578567
 
-id 1
+id 953
 epd rkrnbb1q/pp2pp1p/6pn/2pp4/2B1P2P/8/PPPP1PP1/RKRNB1NQ w CAca - 0 9
 perft 1 28
 perft 2 854
@@ -8586,7 +8587,7 @@ perft 4 755990
 perft 5 21823412
 perft 6 712787248
 
-id 1
+id 954
 epd rk2bnqb/pprpppp1/4n2p/2p5/P7/3P2NP/1PP1PPP1/RKRNB1QB w CAa - 1 9
 perft 1 26
 perft 2 596
@@ -8595,7 +8596,7 @@ perft 4 414862
 perft 5 11758184
 perft 6 323043654
 
-id 1
+id 955
 epd r1krnnbq/pp1ppp1p/6p1/2p5/2P5/P3P3/Rb1P1PPP/1BKRNNBQ w Dda - 0 9
 perft 1 2
 perft 2 61
@@ -8604,7 +8605,7 @@ perft 4 40072
 perft 5 937188
 perft 6 28753562
 
-id 1
+id 956
 epd 1krbnnbq/1pp1p1pp/r7/p2p1p2/3PP3/2P3P1/PP3P1P/RKRBNNBQ w CAc - 0 9
 perft 1 30
 perft 2 953
@@ -8613,7 +8614,7 @@ perft 4 860530
 perft 5 25531358
 perft 6 787205262
 
-id 1
+id 957
 epd rkr1nbbq/2ppp1pp/1pn5/p4p2/P6P/3P4/1PP1PPPB/RKRNNB1Q w CAca - 1 9
 perft 1 24
 perft 2 645
@@ -8622,7 +8623,7 @@ perft 4 446423
 perft 5 11484012
 perft 6 341262639
 
-id 1
+id 958
 epd rkrnnqbb/p1ppp2p/Qp6/4Pp2/5p2/8/PPPP2PP/RKRNN1BB w CAca - 0 9
 perft 1 35
 perft 2 929
@@ -8631,7 +8632,7 @@ perft 4 896130
 perft 5 31272517
 perft 6 915268405
 
-id 1
+id 959
 epd bbq1nr1r/pppppk1p/2n2p2/6p1/P4P2/4P1P1/1PPP3P/BBQNNRKR w HF - 1 9
 perft 1 23
 perft 2 589

From bc1c55aeaf619fd61e5116283705274e701df378 Mon Sep 17 00:00:00 2001
From: Jackson Hall 
Date: Thu, 26 Jan 2023 12:31:56 -0500
Subject: [PATCH 366/613] Update cp multiplier to match Lichess implementation

---
 chess/engine.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index f319d09bf..ca7f876ca 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -664,7 +664,9 @@ def _sf12_wins(cp: int, *, ply: int) -> int:
     return int(0.5 + 1000 / (1 + math.exp((a - x) / b)))
 
 def _lichess_raw_wins(cp: int) -> int:
-    return round(1000 / (1 + math.exp(-0.004 * cp)))
+    # https://github.com/lichess-org/lila/pull/11148
+    # https://github.com/lichess-org/lila/blob/2242b0a08faa06e7be5508d338ede7bb09049777/modules/analyse/src/main/WinPercent.scala#L26-L30
+    return round(1000 / (1 + math.exp(-0.00368208 * cp)))
 
 
 class Cp(Score):

From b15d55e955d821a65d05416439e0d04c45be5d9a Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 2 Feb 2023 23:31:24 -0800
Subject: [PATCH 367/613] Send opponent information to Xboard engines

---
 chess/engine.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index ca7f876ca..cfdd58845 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1945,6 +1945,8 @@ def __init__(self) -> None:
         self.options = {
             "random": Option("random", "check", False, None, None, None),
             "computer": Option("computer", "check", False, None, None, None),
+            "name": Option("name", "string", "", None, None, None),
+            "rating": Option("rating", "string", "", None, None, None)
         }
         self.config: Dict[str, ConfigValue] = {}
         self.target_config: Dict[str, ConfigValue] = {}
@@ -2055,7 +2057,7 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping) -> None
 
         # Set up starting position.
         root = board.root()
-        new_options = "random" in options or "computer" in options
+        new_options = any(param in options for param in ("random", "computer", "name", "rating"))
         new_game = self.first_game or self.game != game or new_options or root != self.board.root()
         self.game = game
         self.first_game = False
@@ -2071,6 +2073,10 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping) -> None
 
             if self.config.get("random"):
                 self.send_line("random")
+            if "name" in options and self.features.get("name", True):
+                self.send_line(f"name {options['name']}")
+            if "rating" in options:
+                self.send_line(f"rating {options['rating']}")
             if self.config.get("computer"):
                 self.send_line("computer")
 
@@ -2369,7 +2375,7 @@ def _setoption(self, name: str, value: ConfigValue) -> None:
 
         self.config[name] = value = option.parse(value)
 
-        if name in ["random", "computer"]:
+        if name in ["random", "computer", "name", "rating"]:
             # Applied in _new.
             pass
         elif name in ["memory", "cores"] or name.startswith("egtpath "):

From 8a270859cab13537561998f1dbf601d9b0175e4c Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Fri, 3 Feb 2023 00:46:13 -0800
Subject: [PATCH 368/613] Use configure() method instead of play()

---
 chess/engine.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index cfdd58845..e91eaaba8 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2073,10 +2073,10 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping) -> None
 
             if self.config.get("random"):
                 self.send_line("random")
-            if "name" in options and self.features.get("name", True):
-                self.send_line(f"name {options['name']}")
-            if "rating" in options:
-                self.send_line(f"rating {options['rating']}")
+            if "name" in self.config and self.features.get("name", True):
+                self.send_line(f"name {self.config['name']}")
+            if "rating" in self.config:
+                self.send_line(f"rating {self.config['rating']}")
             if self.config.get("computer"):
                 self.send_line("computer")
 

From 13be99744cbcb00480d08fb5582694c2a3e62469 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Fri, 3 Feb 2023 01:11:37 -0800
Subject: [PATCH 369/613] Fix failing tests

---
 chess/engine.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index e91eaaba8..68f54123c 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2073,9 +2073,9 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping) -> None
 
             if self.config.get("random"):
                 self.send_line("random")
-            if "name" in self.config and self.features.get("name", True):
+            if self.config.get("name") and self.features.get("name", True):
                 self.send_line(f"name {self.config['name']}")
-            if "rating" in self.config:
+            if self.config.get("rating"):
                 self.send_line(f"rating {self.config['rating']}")
             if self.config.get("computer"):
                 self.send_line("computer")

From cb70c4db7f7fb8c49c759a2489d5c82412bb7691 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sat, 4 Feb 2023 20:21:40 -0800
Subject: [PATCH 370/613] Separate rating inputs

---
 chess/engine.py | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 68f54123c..8f21f74ef 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1946,7 +1946,8 @@ def __init__(self) -> None:
             "random": Option("random", "check", False, None, None, None),
             "computer": Option("computer", "check", False, None, None, None),
             "name": Option("name", "string", "", None, None, None),
-            "rating": Option("rating", "string", "", None, None, None)
+            "engine_rating": Option("engine_rating", "spin", "", None, None, None),
+            "opponent_rating": Option("opponent_rating", "spin", "", None, None, None)
         }
         self.config: Dict[str, ConfigValue] = {}
         self.target_config: Dict[str, ConfigValue] = {}
@@ -2057,7 +2058,7 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping) -> None
 
         # Set up starting position.
         root = board.root()
-        new_options = any(param in options for param in ("random", "computer", "name", "rating"))
+        new_options = any(param in options for param in ("random", "computer", "name", "engine_rating", "opponent_rating"))
         new_game = self.first_game or self.game != game or new_options or root != self.board.root()
         self.game = game
         self.first_game = False
@@ -2075,8 +2076,8 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping) -> None
                 self.send_line("random")
             if self.config.get("name") and self.features.get("name", True):
                 self.send_line(f"name {self.config['name']}")
-            if self.config.get("rating"):
-                self.send_line(f"rating {self.config['rating']}")
+            if self.config.get("engine_rating") or self.config.get("opponent_rating"):
+                self.send_line(f"rating {self.config.get('engine_rating') or 0} {self.config.get('opponent_rating') or 0}")
             if self.config.get("computer"):
                 self.send_line("computer")
 
@@ -2375,7 +2376,7 @@ def _setoption(self, name: str, value: ConfigValue) -> None:
 
         self.config[name] = value = option.parse(value)
 
-        if name in ["random", "computer", "name", "rating"]:
+        if name in ["random", "computer", "name", "engine_rating", "opponent_rating"]:
             # Applied in _new.
             pass
         elif name in ["memory", "cores"] or name.startswith("egtpath "):

From 7cf7dc15221925fe13e42cd279b035afdfa1cf94 Mon Sep 17 00:00:00 2001
From: disservin <45608332+Disservin@users.noreply.github.com>
Date: Wed, 15 Feb 2023 21:14:18 +0100
Subject: [PATCH 371/613] strip option args

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index ca7f876ca..59455d503 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1377,7 +1377,7 @@ def _option(self, engine: UciProtocol, arg: str) -> None:
                 current_var = None
                 var = []
 
-                for token in arg.split(" "):
+                for token in arg.strip().split(" "):
                     if token == "name" and not name:
                         current_parameter = "name"
                     elif token == "type" and not type:

From 5859dc20f01df7f862c06811a4d8206b76107cee Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sun, 19 Feb 2023 20:58:01 -0800
Subject: [PATCH 372/613] Support implicit resigning from Xboard engines

An XBoard engine is allowed to resign by putting the string "resign"
somewhere in the comment of a "1-0" or "0-1" command. For example,
"0-1 {White resigns}".

Closes #964
---
 chess/engine.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/chess/engine.py b/chess/engine.py
index ca7f876ca..8e5075fc5 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2197,6 +2197,8 @@ def line_received(self, engine: XBoardProtocol, line: str) -> None:
                         self.play_result.resigned = True
                     self._ping_after_move(engine)
                 elif line.startswith("1-0") or line.startswith("0-1") or line.startswith("1/2-1/2"):
+                    if "resign" in line and not self.result.done():
+                        self.play_result.resigned = True
                     self._ping_after_move(engine)
                 elif line.startswith("#"):
                     pass

From 47db69c6650bbc88109b5f0841fe87cc6a27a5b7 Mon Sep 17 00:00:00 2001
From: Joerg Sonnenberger 
Date: Fri, 24 Feb 2023 01:18:32 +0100
Subject: [PATCH 373/613] SVG output: add option for borders around board and
 diagram

This is useful for printing when the margin is typically white to still
give the visual clues about separation. Option defaults to off.

Also slightly pad the coordinates at the top, so that "f" doesn't run
into the outer border.
---
 chess/svg.py | 76 +++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 55 insertions(+), 21 deletions(-)

diff --git a/chess/svg.py b/chess/svg.py
index 6021e2054..d7aea03d9 100644
--- a/chess/svg.py
+++ b/chess/svg.py
@@ -76,6 +76,8 @@
     "square dark lastmove": "#aaa23b",
     "square light lastmove": "#cdd16a",
     "margin": "#212121",
+    "inner border": "#111",
+    "outer border": "#111",
     "coord": "#e5e5e5",
     "arrow green": "#15781B80",
     "arrow red": "#88202080",
@@ -245,7 +247,8 @@ def board(board: Optional[chess.BaseBoard] = None, *,
           coordinates: bool = True,
           colors: Dict[str, str] = {},
           flipped: bool = False,
-          style: Optional[str] = None) -> str:
+          style: Optional[str] = None,
+          borders: bool = False) -> str:
     """
     Renders a board with pieces and/or selected squares as an SVG image.
 
@@ -267,11 +270,14 @@ def board(board: Optional[chess.BaseBoard] = None, *,
     :param coordinates: Pass ``False`` to disable the coordinate margin.
     :param colors: A dictionary to override default colors. Possible keys are
         ``square light``, ``square dark``, ``square light lastmove``,
-        ``square dark lastmove``, ``margin``, ``coord``, ``arrow green``,
-        ``arrow blue``, ``arrow red``, and ``arrow yellow``. Values should look
-        like ``#ffce9e`` (opaque), or ``#15781B80`` (transparent).
+        ``square dark lastmove``, ``margin``, ``coord``, ``inner border``,
+        ``outer border``, ``arrow green``, ``arrow blue``, ``arrow red``,
+        and ``arrow yellow``. Values should look like ``#ffce9e`` (opaque),
+        or ``#15781B80`` (transparent).
     :param flipped: Pass ``True`` to flip the board.
     :param style: A CSS stylesheet to include in the SVG image.
+    :param borders: Pass ``True`` to enable a border around the board and,
+       (if ``coordinates`` is enabled) the coordinate margin.
 
     >>> import chess
     >>> import chess.svg
@@ -293,8 +299,11 @@ def board(board: Optional[chess.BaseBoard] = None, *,
         Use *orientation* with a color instead of the *flipped* toggle.
     """
     orientation ^= flipped
+    inner_border = 1 if borders and coordinates else 0
+    outer_border = 1 if borders else 0
     margin = 15 if coordinates else 0
-    svg = _svg(8 * SQUARE_SIZE + 2 * margin, size)
+    full_size = 2 * outer_border + 2 * margin + 2 * inner_border + 8 * SQUARE_SIZE
+    svg = _svg(full_size, size)
 
     if style:
         ET.SubElement(svg, "style").text = style
@@ -318,34 +327,59 @@ def board(board: Optional[chess.BaseBoard] = None, *,
     if check is not None:
         defs.append(ET.fromstring(CHECK_GRADIENT))
 
-    # Render coordinates.
-    if coordinates:
-        margin_color, margin_opacity = _select_color(colors, "margin")
+    if outer_border:
+        outer_border_color, outer_border_opacity = _select_color(colors, "outer border")
         ET.SubElement(svg, "rect", _attrs({
             "x": 0,
             "y": 0,
-            "width": 2 * margin + 8 * SQUARE_SIZE,
-            "height": 2 * margin + 8 * SQUARE_SIZE,
+            "width": full_size,
+            "height": full_size,
+            "fill": outer_border_color,
+            "opacity": outer_border_opacity if outer_border_opacity < 1.0 else None,
+        }))
+
+    if margin:
+        margin_color, margin_opacity = _select_color(colors, "margin")
+        ET.SubElement(svg, "rect", _attrs({
+            "x": outer_border,
+            "y": outer_border,
+            "width": full_size - 2 * outer_border,
+            "height": full_size - 2 * outer_border,
             "fill": margin_color,
             "opacity": margin_opacity if margin_opacity < 1.0 else None,
         }))
+
+    if inner_border:
+        inner_border_color, inner_border_opacity = _select_color(colors, "inner border")
+        ET.SubElement(svg, "rect", _attrs({
+            "x": outer_border + margin,
+            "y": outer_border + margin,
+            "width": full_size - 2 * outer_border - 2 * margin,
+            "height": full_size - 2 * outer_border - 2 * margin,
+            "fill": inner_border_color,
+            "opacity": inner_border_opacity if inner_border_opacity < 1.0 else None,
+        }))
+
+    # Render coordinates.
+    if coordinates:
         coord_color, coord_opacity = _select_color(colors, "coord")
         for file_index, file_name in enumerate(chess.FILE_NAMES):
-            x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin
-            svg.append(_coord(file_name, x, 0, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity))
-            svg.append(_coord(file_name, x, margin + 8 * SQUARE_SIZE, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity))
+            x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + inner_border + margin + outer_border
+            # Keep some padding here to separate the ascender from the border
+            svg.append(_coord(file_name, x, 1, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity))
+            svg.append(_coord(file_name, x, full_size - outer_border - margin, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity))
         for rank_index, rank_name in enumerate(chess.RANK_NAMES):
-            y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + margin
+            y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + inner_border + margin + outer_border
             svg.append(_coord(rank_name, 0, y, margin, SQUARE_SIZE, False, margin, color=coord_color, opacity=coord_opacity))
-            svg.append(_coord(rank_name, margin + 8 * SQUARE_SIZE, y, margin, SQUARE_SIZE, False, margin, color=coord_color, opacity=coord_opacity))
+            svg.append(_coord(rank_name, full_size - outer_border - margin, y, margin, SQUARE_SIZE, False, margin, color=coord_color, opacity=coord_opacity))
 
     # Render board.
     for square, bb in enumerate(chess.BB_SQUARES):
         file_index = chess.square_file(square)
         rank_index = chess.square_rank(square)
 
-        x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin
-        y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + margin
+        x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + inner_border + margin + outer_border
+        y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + inner_border + margin + outer_border
 
         cls = ["square", "light" if chess.BB_LIGHT_SQUARES & bb else "dark"]
         if lastmove and square in [lastmove.from_square, lastmove.to_square]:
@@ -442,10 +476,10 @@ def board(board: Optional[chess.BaseBoard] = None, *,
         head_file = chess.square_file(head)
         head_rank = chess.square_rank(head)
 
-        xtail = margin + (tail_file + 0.5 if orientation else 7.5 - tail_file) * SQUARE_SIZE
-        ytail = margin + (7.5 - tail_rank if orientation else tail_rank + 0.5) * SQUARE_SIZE
-        xhead = margin + (head_file + 0.5 if orientation else 7.5 - head_file) * SQUARE_SIZE
-        yhead = margin + (7.5 - head_rank if orientation else head_rank + 0.5) * SQUARE_SIZE
+        xtail = outer_border + margin + inner_border + (tail_file + 0.5 if orientation else 7.5 - tail_file) * SQUARE_SIZE
+        ytail = outer_border + margin + inner_border + (7.5 - tail_rank if orientation else tail_rank + 0.5) * SQUARE_SIZE
+        xhead = outer_border + margin + inner_border + (head_file + 0.5 if orientation else 7.5 - head_file) * SQUARE_SIZE
+        yhead = outer_border + margin + inner_border + (7.5 - head_rank if orientation else head_rank + 0.5) * SQUARE_SIZE
 
         if (head_file, head_rank) == (tail_file, tail_rank):
             ET.SubElement(svg, "circle", _attrs({

From 3439cb61bc632b7cb4087d512683f3abf75dfce3 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 24 Feb 2023 19:26:45 +0100
Subject: [PATCH 374/613] Tweak chess.svg.board(..., borders) docs

---
 chess/svg.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/chess/svg.py b/chess/svg.py
index d7aea03d9..dbcbc5321 100644
--- a/chess/svg.py
+++ b/chess/svg.py
@@ -247,8 +247,8 @@ def board(board: Optional[chess.BaseBoard] = None, *,
           coordinates: bool = True,
           colors: Dict[str, str] = {},
           flipped: bool = False,
-          style: Optional[str] = None,
-          borders: bool = False) -> str:
+          borders: bool = False,
+          style: Optional[str] = None) -> str:
     """
     Renders a board with pieces and/or selected squares as an SVG image.
 
@@ -275,9 +275,9 @@ def board(board: Optional[chess.BaseBoard] = None, *,
         and ``arrow yellow``. Values should look like ``#ffce9e`` (opaque),
         or ``#15781B80`` (transparent).
     :param flipped: Pass ``True`` to flip the board.
-    :param style: A CSS stylesheet to include in the SVG image.
     :param borders: Pass ``True`` to enable a border around the board and,
-       (if ``coordinates`` is enabled) the coordinate margin.
+       (if *coordinates* is enabled) the coordinate margin.
+    :param style: A CSS stylesheet to include in the SVG image.
 
     >>> import chess
     >>> import chess.svg

From ac294570687fb38db448e010590ff7f7d3bb89ff Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 24 Feb 2023 20:23:17 +0100
Subject: [PATCH 375/613] Improve chess.pgn error logs (closes #961)

---
 chess/pgn.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 1a01b034e..8750443c5 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -872,12 +872,13 @@ def builder(cls: Type[GameT]) -> GameBuilder[GameT]:
         return GameBuilder(Game=cls)
 
     def __repr__(self) -> str:
-        return "<{} at {:#x} ({!r} vs. {!r}, {!r}{})>".format(
+        return "<{} at {:#x} ({!r} vs. {!r}, {!r} at {!r}{})>".format(
             type(self).__name__,
             id(self),
             self.headers.get("White", "?"),
             self.headers.get("Black", "?"),
             self.headers.get("Date", "????.??.??"),
+            self.headers.get("Site", "?"),
             f", {len(self.errors)} errors" if self.errors else "")
 
 
@@ -1202,7 +1203,7 @@ def handle_error(self, error: Exception) -> None:
         >>>
         >>> game = chess.pgn.read_game(pgn, Visitor=MyGameBuilder)
         """
-        LOGGER.exception("error during pgn parsing")
+        LOGGER.error("%s while parsing %r", error, self.game)
         self.game.errors.append(error)
 
     def result(self) -> GameT:

From 7d0b189084a27136b2e04816fb6d70a37a2a7735 Mon Sep 17 00:00:00 2001
From: Joerg Sonnenberger 
Date: Sat, 25 Feb 2023 00:56:15 +0100
Subject: [PATCH 376/613] SVG: use a stroked rect for borders and margin

This avoids painting the area under the squares. This makes it easier to
use opacity for the field colors.
---
 chess/svg.py | 36 +++++++++++++++++++++---------------
 1 file changed, 21 insertions(+), 15 deletions(-)

diff --git a/chess/svg.py b/chess/svg.py
index dbcbc5321..008b0c87c 100644
--- a/chess/svg.py
+++ b/chess/svg.py
@@ -330,33 +330,39 @@ def board(board: Optional[chess.BaseBoard] = None, *,
     if outer_border:
         outer_border_color, outer_border_opacity = _select_color(colors, "outer border")
         ET.SubElement(svg, "rect", _attrs({
-            "x": 0,
-            "y": 0,
-            "width": full_size,
-            "height": full_size,
-            "fill": outer_border_color,
+            "x": outer_border / 2,
+            "y": outer_border / 2,
+            "width": full_size - outer_border,
+            "height": full_size - outer_border,
+            "fill": "none",
+            "stroke": outer_border_color,
+            "stroke-width": outer_border,
             "opacity": outer_border_opacity if outer_border_opacity < 1.0 else None,
         }))
 
     if margin:
         margin_color, margin_opacity = _select_color(colors, "margin")
         ET.SubElement(svg, "rect", _attrs({
-            "x": outer_border,
-            "y": outer_border,
-            "width": full_size - 2 * outer_border,
-            "height": full_size - 2 * outer_border,
-            "fill": margin_color,
+            "x": outer_border + margin / 2,
+            "y": outer_border + margin / 2,
+            "width": full_size - 2 * outer_border - margin,
+            "height": full_size - 2 * outer_border - margin,
+            "fill": "none",
+            "stroke": margin_color,
+            "stroke-width": margin,
             "opacity": margin_opacity if margin_opacity < 1.0 else None,
         }))
 
     if inner_border:
         inner_border_color, inner_border_opacity = _select_color(colors, "inner border")
         ET.SubElement(svg, "rect", _attrs({
-            "x": outer_border + margin,
-            "y": outer_border + margin,
-            "width": full_size - 2 * outer_border - 2 * margin,
-            "height": full_size - 2 * outer_border - 2 * margin,
-            "fill": inner_border_color,
+            "x": outer_border + margin + inner_border / 2,
+            "y": outer_border + margin + inner_border / 2,
+            "width": full_size - 2 * outer_border - 2 * margin - inner_border,
+            "height": full_size - 2 * outer_border - 2 * margin - inner_border,
+            "fill": "none",
+            "stroke": inner_border_color,
+            "stroke-width": inner_border,
             "opacity": inner_border_opacity if inner_border_opacity < 1.0 else None,
         }))
 

From d264559502ded8b6aa0bdaabd837f9e45f5a71b3 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Tue, 28 Feb 2023 00:14:55 -0800
Subject: [PATCH 377/613] Fix default values for rating configuration

---
 chess/engine.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 8f21f74ef..b7551598a 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1946,8 +1946,8 @@ def __init__(self) -> None:
             "random": Option("random", "check", False, None, None, None),
             "computer": Option("computer", "check", False, None, None, None),
             "name": Option("name", "string", "", None, None, None),
-            "engine_rating": Option("engine_rating", "spin", "", None, None, None),
-            "opponent_rating": Option("opponent_rating", "spin", "", None, None, None)
+            "engine_rating": Option("engine_rating", "spin", 0, None, None, None),
+            "opponent_rating": Option("opponent_rating", "spin", 0, None, None, None)
         }
         self.config: Dict[str, ConfigValue] = {}
         self.target_config: Dict[str, ConfigValue] = {}

From fe199c799a01b37852ca2d3473f1af63b29b58f7 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 1 Mar 2023 02:58:23 -0800
Subject: [PATCH 378/613] Create unified API for sending opponent info

Opponent information will be sent after "new" (for XBoard engines) or
"ucinewgame" (for UCI engines).
---
 chess/engine.py | 44 +++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index b7551598a..5ff66c6c0 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1121,6 +1121,19 @@ async def configure(self, options: ConfigMapping) -> None:
             (:func:`chess.engine.Option.is_managed()`).
         """
 
+    @abc.abstractmethod
+    async def send_opponent_information(self, *, opponent_name: Optional[str] = None, opponent_rating: Optional[int] = None, opponent_title: Optional[str] = None, opponent_is_engine: bool = False, engine_rating: Optional[int] = None) -> None:
+        """
+        Sends the engine information about its opponent. The information will
+        be sent after a new game is announced and before the first move.
+
+        :param opponent_name: Optional. The opponent's name.
+        :param opponent_rating: Optional. The opponent's ELO rating.
+        :param opponent_title: Optional. The opponent's title, such as GM, IM, and the like.
+        :param opponent_is_engine: Optional. Whether or not the opponent is another engine.
+        :param engine_rating: Optional. This engine's own rating. Only used by XBoard engines.
+        """
+
     @abc.abstractmethod
     async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult:
         """
@@ -1435,6 +1448,9 @@ def _isready(self) -> None:
 
     def _ucinewgame(self) -> None:
         self.send_line("ucinewgame")
+        opponent_info = self.config.get("UCI_Opponent")
+        if opponent_info:
+            self.send_line(f"setoption name UCI_Opponent value {opponent_info}")
         self.first_game = False
         self.ponderhit = False
 
@@ -1481,7 +1497,8 @@ def _setoption(self, name: str, value: ConfigValue) -> None:
                 builder.append("value")
                 builder.append(str(value))
 
-            self.send_line(" ".join(builder))
+            if name != "UCI_Opponent":  # sent after ucinewgame
+                self.send_line(" ".join(builder))
             self.config[name] = value
 
     def _configure(self, options: ConfigMapping) -> None:
@@ -1500,6 +1517,13 @@ def start(self, engine: UciProtocol) -> None:
 
         return await self.communicate(UciConfigureCommand)
 
+    async def send_opponent_information(self, *, opponent_name: Optional[str] = None, opponent_rating: Optional[int] = None, opponent_title: Optional[str] = None, opponent_is_engine: bool = False, engine_rating: Optional[int] = None) -> None:
+        if opponent_name and "UCI_Opponent" in self.options:
+            rating = opponent_rating or "none"
+            title = opponent_title or "none"
+            player_type = "computer" if opponent_is_engine else "human"
+            return await self.configure({"UCI_Opponent": f"{title} {rating} {player_type} {opponent_name}"})
+
     def _position(self, board: chess.Board) -> None:
         # Select UCI_Variant and UCI_Chess960.
         uci_variant = type(board).uci_variant
@@ -2406,6 +2430,16 @@ def start(self, engine: XBoardProtocol) -> None:
 
         return await self.communicate(XBoardConfigureCommand)
 
+    async def send_opponent_information(self, *, opponent_name: Optional[str] = None, opponent_rating: Optional[str] = None, opponent_title: Optional[str] = None, opponent_is_engine: bool = False, engine_rating: Optional[str] = None) -> None:
+        opponent_info = {"engine_rating": engine_rating or 0,
+                         "opponent_rating": opponent_rating or 0,
+                         "computer": opponent_is_engine}
+        
+        if self.features.get("name", True):
+            opponent_info["name"] = opponent_name
+        
+        return await self.configure(opponent_info)
+
     async def quit(self) -> None:
         self.send_line("quit")
         await asyncio.shield(self.returncode)
@@ -2789,6 +2823,14 @@ def configure(self, options: ConfigMapping) -> None:
             future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)
         return future.result()
 
+    def send_opponent_information(self, *, opponent_name: Optional[str] = None, opponent_rating: Optional[int] = None, opponent_title: Optional[str] = None, opponent_is_engine: bool = False, engine_rating: Optional[int] = None) -> None:
+        with self._not_shut_down():
+            coro = asyncio.wait_for(
+                self.protocol.send_opponent_information(opponent_name=opponent_name, opponent_rating=opponent_rating, opponent_title=opponent_title, opponent_is_engine=opponent_is_engine, engine_rating=engine_rating),
+                self.timeout)
+            future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)
+        return future.result
+        
     def ping(self) -> None:
         with self._not_shut_down():
             coro = asyncio.wait_for(self.protocol.ping(), self.timeout)

From b2b6163c724241a0c1c1d1dac8d94b8a31abb63c Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 1 Mar 2023 03:18:52 -0800
Subject: [PATCH 379/613] Fix errors found by mypy

---
 chess/engine.py | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 5ff66c6c0..967f8148b 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2430,12 +2430,12 @@ def start(self, engine: XBoardProtocol) -> None:
 
         return await self.communicate(XBoardConfigureCommand)
 
-    async def send_opponent_information(self, *, opponent_name: Optional[str] = None, opponent_rating: Optional[str] = None, opponent_title: Optional[str] = None, opponent_is_engine: bool = False, engine_rating: Optional[str] = None) -> None:
-        opponent_info = {"engine_rating": engine_rating or 0,
-                         "opponent_rating": opponent_rating or 0,
-                         "computer": opponent_is_engine}
+    async def send_opponent_information(self, *, opponent_name: Optional[str] = None, opponent_rating: Optional[int] = None, opponent_title: Optional[str] = None, opponent_is_engine: bool = False, engine_rating: Optional[int] = None) -> None:
+        opponent_info: Dict[str, Union[int, bool, str]] = {"engine_rating": engine_rating or 0,
+                                                           "opponent_rating": opponent_rating or 0,
+                                                           "computer": opponent_is_engine}
         
-        if self.features.get("name", True):
+        if opponent_name and self.features.get("name", True):
             opponent_info["name"] = opponent_name
         
         return await self.configure(opponent_info)
@@ -2829,7 +2829,7 @@ def send_opponent_information(self, *, opponent_name: Optional[str] = None, oppo
                 self.protocol.send_opponent_information(opponent_name=opponent_name, opponent_rating=opponent_rating, opponent_title=opponent_title, opponent_is_engine=opponent_is_engine, engine_rating=engine_rating),
                 self.timeout)
             future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)
-        return future.result
+        return future.result()
         
     def ping(self) -> None:
         with self._not_shut_down():

From 1a642926f3d6d36d3518b0373abfd0fe0182c8f1 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 1 Mar 2023 03:51:48 -0800
Subject: [PATCH 380/613] Add title to opponent's name, if available

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 967f8148b..43d9cbcb7 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2436,7 +2436,7 @@ async def send_opponent_information(self, *, opponent_name: Optional[str] = None
                                                            "computer": opponent_is_engine}
         
         if opponent_name and self.features.get("name", True):
-            opponent_info["name"] = opponent_name
+            opponent_info["name"] = f"{opponent_title or ''} {opponent_name}".strip()
         
         return await self.configure(opponent_info)
 

From 69a5e0f6be881af449e05eba4d49f5b4a7123118 Mon Sep 17 00:00:00 2001
From: James Braza 
Date: Sat, 4 Mar 2023 13:07:05 -0800
Subject: [PATCH 381/613] Added clarity on SimpleEngine, module docstrings to
 code examples, and removed >>> from interpreter

---
 docs/engine.rst | 43 +++++++++++++++++++++++++++++++------------
 1 file changed, 31 insertions(+), 12 deletions(-)

diff --git a/docs/engine.rst b/docs/engine.rst
index 979d0e915..4db5014c3 100644
--- a/docs/engine.rst
+++ b/docs/engine.rst
@@ -19,6 +19,7 @@ The preferred way to use the API is with an
 The examples also show a synchronous wrapper
 :class:`~chess.engine.SimpleEngine` that automatically spawns an event loop
 in the background.
+:class:`~chess.engine.SimpleEngine` methods block until there is a result.
 
 Playing
 -------
@@ -27,6 +28,8 @@ Example: Let Stockfish play against itself, 100 milliseconds per move.
 
 .. code:: python
 
+    """Using synchronous engine.SimpleEngine."""
+
     import chess
     import chess.engine
 
@@ -41,6 +44,8 @@ Example: Let Stockfish play against itself, 100 milliseconds per move.
 
 .. code:: python
 
+    """Using async engine."""
+
     import asyncio
     import chess
     import chess.engine
@@ -74,6 +79,8 @@ Example:
 
 .. code:: python
 
+    """Using synchronous engine.SimpleEngine."""
+
     import chess
     import chess.engine
 
@@ -93,6 +100,8 @@ Example:
 
 .. code:: python
 
+    """Using async engine."""
+
     import asyncio
     import chess
     import chess.engine
@@ -139,6 +148,8 @@ Example: Stream information from the engine and stop on an arbitrary condition.
 
 .. code:: python
 
+    """Using synchronous engine.SimpleEngine."""
+
     import chess
     import chess.engine
 
@@ -156,6 +167,8 @@ Example: Stream information from the engine and stop on an arbitrary condition.
 
 .. code:: python
 
+    """Using async engine."""
+
     import asyncio
     import chess
     import chess.engine
@@ -193,21 +206,27 @@ Options
 :func:`~chess.Protocol.analyse()` and
 :func:`~chess.Protocol.analysis()` accept a dictionary of options.
 
->>> import chess.engine
->>>
->>> engine = chess.engine.SimpleEngine.popen_uci("/usr/bin/stockfish")
->>>
->>> # Check available options.
->>> engine.options["Hash"]
-Option(name='Hash', type='spin', default=16, min=1, max=131072, var=[])
->>>
->>> # Set an option.
->>> engine.configure({"Hash": 32})
->>>
->>> # [...]
+.. code:: python
+
+    """Using synchronous engine.SimpleEngine."""
+
+    import chess.engine
+
+    engine = chess.engine.SimpleEngine.popen_uci("/usr/bin/stockfish")
+
+    # Check available options.
+    engine.options["Hash"]
+    # Option(name='Hash', type='spin', default=16, min=1, max=131072, var=[])
+
+    # Set an option.
+    engine.configure({"Hash": 32})
+
+    # [...]
 
 .. code:: python
 
+    """Using async engine."""
+
     import asyncio
     import chess.engine
 

From 0192ebda9a733b25fd4c51ca7758b194c0f2516d Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 6 Mar 2023 21:11:38 +0100
Subject: [PATCH 382/613] Try code-block captions for #973

---
 docs/engine.rst | 40 ++++++++++++++++------------------------
 1 file changed, 16 insertions(+), 24 deletions(-)

diff --git a/docs/engine.rst b/docs/engine.rst
index 4db5014c3..08f8f8f5e 100644
--- a/docs/engine.rst
+++ b/docs/engine.rst
@@ -26,9 +26,8 @@ Playing
 
 Example: Let Stockfish play against itself, 100 milliseconds per move.
 
-.. code:: python
-
-    """Using synchronous engine.SimpleEngine."""
+.. code-block:: python
+   :caption: Using synchronous :class:`~chess.engine.SimpleEngine`
 
     import chess
     import chess.engine
@@ -42,9 +41,8 @@ Example: Let Stockfish play against itself, 100 milliseconds per move.
 
     engine.quit()
 
-.. code:: python
-
-    """Using async engine."""
+.. code-block:: python
+   :caption: Using asyncio
 
     import asyncio
     import chess
@@ -77,9 +75,8 @@ Analysing and evaluating a position
 
 Example:
 
-.. code:: python
-
-    """Using synchronous engine.SimpleEngine."""
+.. code-block:: python
+   :caption: Using synchronous :class:`~chess.engine.SimpleEngine`
 
     import chess
     import chess.engine
@@ -98,9 +95,8 @@ Example:
 
     engine.quit()
 
-.. code:: python
-
-    """Using async engine."""
+.. code-block:: python
+   :caption: Using asyncio
 
     import asyncio
     import chess
@@ -146,9 +142,8 @@ Indefinite or infinite analysis
 
 Example: Stream information from the engine and stop on an arbitrary condition.
 
-.. code:: python
-
-    """Using synchronous engine.SimpleEngine."""
+.. code-block:: python
+   :caption: Using synchronous :class:`~chess.engine.SimpleEngine`
 
     import chess
     import chess.engine
@@ -165,9 +160,8 @@ Example: Stream information from the engine and stop on an arbitrary condition.
 
     engine.quit()
 
-.. code:: python
-
-    """Using async engine."""
+.. code-block:: python
+   :caption: Using asyncio
 
     import asyncio
     import chess
@@ -206,9 +200,8 @@ Options
 :func:`~chess.Protocol.analyse()` and
 :func:`~chess.Protocol.analysis()` accept a dictionary of options.
 
-.. code:: python
-
-    """Using synchronous engine.SimpleEngine."""
+.. code-block:: python
+   :caption: Using synchronous :class:`~chess.engine.SimpleEngine`
 
     import chess.engine
 
@@ -223,9 +216,8 @@ Options
 
     # [...]
 
-.. code:: python
-
-    """Using async engine."""
+.. code-block:: python
+   :caption: Using asyncio
 
     import asyncio
     import chess.engine

From c408d7c7107efad71ec46d6cec0c39569fd8f352 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Tue, 7 Mar 2023 20:11:32 -0800
Subject: [PATCH 383/613] Make Opponent class to store opponent information

---
 chess/engine.py | 45 +++++++++++++++++++++++++++------------------
 1 file changed, 27 insertions(+), 18 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 43d9cbcb7..4ec23941f 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -438,6 +438,15 @@ class Info(enum.IntFlag):
 INFO_ALL = Info.ALL
 
 
+@dataclasses.dataclass
+class Opponent:
+    """Used to store information about an engine's opponent."""
+    name: Optional[str]
+    title: Optional[str]
+    rating: Optional[int]
+    is_engine = False
+
+
 class PovScore:
     """A relative :class:`~chess.engine.Score` and the point of view."""
 
@@ -1122,15 +1131,12 @@ async def configure(self, options: ConfigMapping) -> None:
         """
 
     @abc.abstractmethod
-    async def send_opponent_information(self, *, opponent_name: Optional[str] = None, opponent_rating: Optional[int] = None, opponent_title: Optional[str] = None, opponent_is_engine: bool = False, engine_rating: Optional[int] = None) -> None:
+    async def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
         """
         Sends the engine information about its opponent. The information will
         be sent after a new game is announced and before the first move.
 
-        :param opponent_name: Optional. The opponent's name.
-        :param opponent_rating: Optional. The opponent's ELO rating.
-        :param opponent_title: Optional. The opponent's title, such as GM, IM, and the like.
-        :param opponent_is_engine: Optional. Whether or not the opponent is another engine.
+        :param opponent: Optional. The opponent's information.
         :param engine_rating: Optional. This engine's own rating. Only used by XBoard engines.
         """
 
@@ -1517,12 +1523,12 @@ def start(self, engine: UciProtocol) -> None:
 
         return await self.communicate(UciConfigureCommand)
 
-    async def send_opponent_information(self, *, opponent_name: Optional[str] = None, opponent_rating: Optional[int] = None, opponent_title: Optional[str] = None, opponent_is_engine: bool = False, engine_rating: Optional[int] = None) -> None:
-        if opponent_name and "UCI_Opponent" in self.options:
-            rating = opponent_rating or "none"
-            title = opponent_title or "none"
-            player_type = "computer" if opponent_is_engine else "human"
-            return await self.configure({"UCI_Opponent": f"{title} {rating} {player_type} {opponent_name}"})
+    async def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
+        if opponent and opponent.name and "UCI_Opponent" in self.options:
+            rating = opponent.rating or "none"
+            title = opponent.title or "none"
+            player_type = "computer" if opponent.is_engine else "human"
+            return await self.configure({"UCI_Opponent": f"{title} {rating} {player_type} {opponent.name}"})
 
     def _position(self, board: chess.Board) -> None:
         # Select UCI_Variant and UCI_Chess960.
@@ -2430,13 +2436,16 @@ def start(self, engine: XBoardProtocol) -> None:
 
         return await self.communicate(XBoardConfigureCommand)
 
-    async def send_opponent_information(self, *, opponent_name: Optional[str] = None, opponent_rating: Optional[int] = None, opponent_title: Optional[str] = None, opponent_is_engine: bool = False, engine_rating: Optional[int] = None) -> None:
+    async def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
+        if opponent is None:
+            return
+
         opponent_info: Dict[str, Union[int, bool, str]] = {"engine_rating": engine_rating or 0,
-                                                           "opponent_rating": opponent_rating or 0,
-                                                           "computer": opponent_is_engine}
+                                                           "opponent_rating": opponent.rating or 0,
+                                                           "computer": opponent.is_engine}
         
-        if opponent_name and self.features.get("name", True):
-            opponent_info["name"] = f"{opponent_title or ''} {opponent_name}".strip()
+        if opponent.name and self.features.get("name", True):
+            opponent_info["name"] = f"{opponent.title or ''} {opponent.name}".strip()
         
         return await self.configure(opponent_info)
 
@@ -2823,10 +2832,10 @@ def configure(self, options: ConfigMapping) -> None:
             future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)
         return future.result()
 
-    def send_opponent_information(self, *, opponent_name: Optional[str] = None, opponent_rating: Optional[int] = None, opponent_title: Optional[str] = None, opponent_is_engine: bool = False, engine_rating: Optional[int] = None) -> None:
+    def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
         with self._not_shut_down():
             coro = asyncio.wait_for(
-                self.protocol.send_opponent_information(opponent_name=opponent_name, opponent_rating=opponent_rating, opponent_title=opponent_title, opponent_is_engine=opponent_is_engine, engine_rating=engine_rating),
+                self.protocol.send_opponent_information(opponent=opponent, engine_rating=engine_rating),
                 self.timeout)
             future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)
         return future.result()

From dcdd7020956316ec69e519d461713eca81ae22c0 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Tue, 7 Mar 2023 20:38:43 -0800
Subject: [PATCH 384/613] Fix default argument and type

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 4ec23941f..feac6fc64 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -444,7 +444,7 @@ class Opponent:
     name: Optional[str]
     title: Optional[str]
     rating: Optional[int]
-    is_engine = False
+    is_engine: Optional[bool]
 
 
 class PovScore:

From 49d31322dc24786de386565cfd94152e6e25884f Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Tue, 7 Mar 2023 20:47:01 -0800
Subject: [PATCH 385/613] Coerce entry to bool

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index feac6fc64..ba5c6ff88 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2442,7 +2442,7 @@ async def send_opponent_information(self, *, opponent: Optional[Opponent] = None
 
         opponent_info: Dict[str, Union[int, bool, str]] = {"engine_rating": engine_rating or 0,
                                                            "opponent_rating": opponent.rating or 0,
-                                                           "computer": opponent.is_engine}
+                                                           "computer": opponent.is_engine or False}
         
         if opponent.name and self.features.get("name", True):
             opponent_info["name"] = f"{opponent.title or ''} {opponent.name}".strip()

From 1613a31cb74e9aeb2de140f9e5d9b096ee7a8cfa Mon Sep 17 00:00:00 2001
From: Trevor Bayless 
Date: Fri, 10 Mar 2023 08:40:06 -0600
Subject: [PATCH 386/613] Remove unused ponderhit code

---
 chess/engine.py | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 402252f83..d94bc028f 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1577,9 +1577,6 @@ def _go(self, limit: Limit, *, root_moves: Optional[Iterable[chess.Move]] = None
         self.send_line(" ".join(builder))
 
     async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult:
-        same_game = not self.first_game and game == self.game and not options
-        self.last_move = board.move_stack[-1] if (same_game and ponder and board.move_stack) else chess.Move.null()
-
         class UciPlayCommand(BaseCommand[UciProtocol, PlayResult]):
             def __init__(self, engine: UciProtocol):
                 super().__init__(engine)

From 1f975c4000f91b1a54f368b3830641ab7e7ec159 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Mon, 13 Mar 2023 00:11:33 -0700
Subject: [PATCH 387/613] Add opponent information to play() method

---
 chess/engine.py | 61 +++++++++++++++++++++++++++++++------------------
 1 file changed, 39 insertions(+), 22 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index ba5c6ff88..2545b6ea8 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1141,7 +1141,7 @@ async def send_opponent_information(self, *, opponent: Optional[Opponent] = None
         """
 
     @abc.abstractmethod
-    async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult:
+    async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}, opponent: Optional[Opponent] = None) -> PlayResult:
         """
         Plays a position.
 
@@ -1167,6 +1167,10 @@ async def play(self, board: chess.Board, limit: Limit, *, game: object = None, i
             analysis. The previous configuration will be restored after the
             analysis is complete. You can permanently apply a configuration
             with :func:`~chess.engine.Protocol.configure()`.
+        :param opponent: Optional. Information about a new opponent. Information
+            about the original opponent will be restored once the move is
+            complete. New opponent information can be made permanent with
+            :func:`~chess.engine.Protocol.send_opponent_information()`.
         """
 
     @typing.overload
@@ -1452,9 +1456,9 @@ def _id(self, engine: UciProtocol, arg: str) -> None:
     def _isready(self) -> None:
         self.send_line("isready")
 
-    def _ucinewgame(self) -> None:
+    def _ucinewgame(self, *, opponent: Optional[Opponent] = None) -> None:
         self.send_line("ucinewgame")
-        opponent_info = self.config.get("UCI_Opponent")
+        opponent_info = self._opponent_configuration(opponent=opponent).get("UCI_Opponent") or self.config.get("UCI_Opponent")
         if opponent_info:
             self.send_line(f"setoption name UCI_Opponent value {opponent_info}")
         self.first_game = False
@@ -1523,12 +1527,17 @@ def start(self, engine: UciProtocol) -> None:
 
         return await self.communicate(UciConfigureCommand)
 
-    async def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
+    def _opponent_configuration(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> ConfigMapping:
         if opponent and opponent.name and "UCI_Opponent" in self.options:
             rating = opponent.rating or "none"
             title = opponent.title or "none"
             player_type = "computer" if opponent.is_engine else "human"
-            return await self.configure({"UCI_Opponent": f"{title} {rating} {player_type} {opponent.name}"})
+            return {"UCI_Opponent": f"{title} {rating} {player_type} {opponent.name}"}
+        else:
+            return {}
+
+    async def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
+        return await self.configure(self._opponent_configuration(opponent=opponent, engine_rating=engine_rating))
 
     def _position(self, board: chess.Board) -> None:
         # Select UCI_Variant and UCI_Chess960.
@@ -1606,7 +1615,7 @@ def _go(self, limit: Limit, *, root_moves: Optional[Iterable[chess.Move]] = None
                 builder.append("0000")
         self.send_line(" ".join(builder))
 
-    async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult:
+    async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}, opponent: Optional[Opponent] = None) -> PlayResult:
         same_game = not self.first_game and game == self.game and not options
         self.last_move = board.move_stack[-1] if (same_game and ponder and board.move_stack) else chess.Move.null()
 
@@ -1639,9 +1648,9 @@ def start(self, engine: UciProtocol) -> None:
 
                 engine._configure(options)
 
-                if engine.first_game or engine.game != game:
+                if engine.first_game or engine.game != game or opponent:
                     engine.game = game
-                    engine._ucinewgame()
+                    engine._ucinewgame(opponent=opponent)
                     self.sent_isready = True
                     engine._isready()
                 else:
@@ -2083,13 +2092,13 @@ def _variant(self, variant: Optional[str]) -> None:
 
         self.send_line(f"variant {variant}")
 
-    def _new(self, board: chess.Board, game: object, options: ConfigMapping) -> None:
+    def _new(self, board: chess.Board, game: object, options: ConfigMapping, opponent: Optional[Opponent] = None) -> None:
         self._configure(options)
 
         # Set up starting position.
         root = board.root()
         new_options = any(param in options for param in ("random", "computer", "name", "engine_rating", "opponent_rating"))
-        new_game = self.first_game or self.game != game or new_options or root != self.board.root()
+        new_game = self.first_game or self.game != game or new_options or opponent or root != self.board.root()
         self.game = game
         self.first_game = False
         if new_game:
@@ -2104,11 +2113,16 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping) -> None
 
             if self.config.get("random"):
                 self.send_line("random")
-            if self.config.get("name") and self.features.get("name", True):
+            
+            opponent_name = (opponent.name if opponent else None) or self.config.get("name")
+            if opponent_name and self.features.get("name", True):
                 self.send_line(f"name {self.config['name']}")
-            if self.config.get("engine_rating") or self.config.get("opponent_rating"):
-                self.send_line(f"rating {self.config.get('engine_rating') or 0} {self.config.get('opponent_rating') or 0}")
-            if self.config.get("computer"):
+
+            opponent_rating = (opponent.rating if opponent else None) or self.config.get("opponent_rating") or 0
+            if self.config.get("engine_rating") or opponent_rating:
+                self.send_line(f"rating {self.config.get('engine_rating') or 0} {opponent_rating}")
+
+            if (opponent and opponent.is_engine) or self.config.get("computer"):
                 self.send_line("computer")
 
         self.send_line("force")
@@ -2162,7 +2176,7 @@ def line_received(self, engine: XBoardProtocol, line: str) -> None:
 
         return await self.communicate(XBoardPingCommand)
 
-    async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult:
+    async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}, opponent: Optional[Opponent] = None) -> PlayResult:
         if root_moves is not None:
             raise EngineError("play with root_moves, but xboard supports 'include' only in analysis mode")
 
@@ -2174,7 +2188,7 @@ def start(self, engine: XBoardProtocol) -> None:
                 self.pong_after_ponder: Optional[str] = None
 
                 # Set game, position and configure.
-                engine._new(board, game, options)
+                engine._new(board, game, options, opponent)
 
                 # Limit or time control.
                 clock = limit.white_clock if board.turn else limit.black_clock
@@ -2436,9 +2450,9 @@ def start(self, engine: XBoardProtocol) -> None:
 
         return await self.communicate(XBoardConfigureCommand)
 
-    async def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
+    def _opponent_configuration(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> ConfigMapping:
         if opponent is None:
-            return
+            return {}
 
         opponent_info: Dict[str, Union[int, bool, str]] = {"engine_rating": engine_rating or 0,
                                                            "opponent_rating": opponent.rating or 0,
@@ -2446,8 +2460,11 @@ async def send_opponent_information(self, *, opponent: Optional[Opponent] = None
         
         if opponent.name and self.features.get("name", True):
             opponent_info["name"] = f"{opponent.title or ''} {opponent.name}".strip()
-        
-        return await self.configure(opponent_info)
+
+        return opponent_info
+
+    async def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
+        return await self.configure(self._opponent_configuration(opponent=opponent, engine_rating=engine_rating))
 
     async def quit(self) -> None:
         self.send_line("quit")
@@ -2846,10 +2863,10 @@ def ping(self) -> None:
             future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)
         return future.result()
 
-    def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> PlayResult:
+    def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}, opponent: Optional[Opponent] = None) -> PlayResult:
         with self._not_shut_down():
             coro = asyncio.wait_for(
-                self.protocol.play(board, limit, game=game, info=info, ponder=ponder, draw_offered=draw_offered, root_moves=root_moves, options=options),
+                self.protocol.play(board, limit, game=game, info=info, ponder=ponder, draw_offered=draw_offered, root_moves=root_moves, options=options, opponent=opponent),
                 self._timeout_for(limit))
             future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)
         return future.result()

From f24517d23e4183ae12b373be267105335250cfad Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 15 Mar 2023 02:15:03 -0700
Subject: [PATCH 388/613] Add tests for play() method with opponent

Requires that opponent information is always and only sent
after a ucinewgame message. Specifying a new opponent
in the play() method results in a new game starting.
---
 test.py | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/test.py b/test.py
index 29ea02749..a9dd5d89b 100755
--- a/test.py
+++ b/test.py
@@ -3271,13 +3271,18 @@ async def main():
             mock.expect("uci", [
                 "option name Hash type spin default 16 min 1 max 33554432",
                 "option name Ponder type check default false",
+                "option name UCI_Opponent type string",
                 "uciok",
             ])
             await protocol.initialize()
 
+            primary_opponent = chess.engine.Opponent("Eliza", None, 3500, True)
+            await protocol.send_opponent_information(opponent=primary_opponent)
+
             # First search.
             mock.expect("setoption name Ponder value true")
             mock.expect("ucinewgame")
+            mock.expect("setoption name UCI_Opponent value none 3500 computer Eliza")
             mock.expect("isready", ["readyok"])
             mock.expect("position startpos")
             mock.expect("go movetime 1000", ["bestmove d2d4 ponder g8f6"])
@@ -3341,6 +3346,33 @@ async def main():
             mock.expect("go ponder movetime 5000")
             await protocol.play(board, chess.engine.Limit(time=5), ponder=True)
 
+            # Ponderhit prevented by new opponent, which starts a new game.
+            board.push(chess.Move.from_uci("c4d5"))
+            board.push(chess.Move.from_uci("e6d5"))
+            mock.expect("stop", ["bestmove c1g5 ponder h7h6"])
+            mock.expect("ucinewgame")
+            mock.expect("setoption name UCI_Opponent value GM 3000 human Guy Chapman")
+            mock.expect("isready", ["readyok"])
+            mock.expect("position startpos moves d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 c4d5 e6d5")
+            mock.expect("go movetime 5000", ["bestmove c1g5 ponder h7h6"])
+            mock.expect("position startpos moves d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 c4d5 e6d5 c1g5 h7h6")
+            mock.expect("go ponder movetime 5000")
+            opponent = chess.engine.Opponent("Guy Chapman", "GM", 3000, False)
+            await protocol.play(board, chess.engine.Limit(time=5), ponder=True, opponent=opponent)
+
+            # Ponderhit prevented by restoration of previous opponent, which again starts a new game.
+            board.push(chess.Move.from_uci("c1g5"))
+            board.push(chess.Move.from_uci("h7h6"))
+            mock.expect("stop", ["bestmove g5h4 ponder b8c6"])
+            mock.expect("ucinewgame")
+            mock.expect("setoption name UCI_Opponent value none 3500 computer Eliza")
+            mock.expect("isready", ["readyok"])
+            mock.expect("position startpos moves d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 c4d5 e6d5 c1g5 h7h6")
+            mock.expect("go movetime 5000", ["bestmove g5h4 ponder b8c6"])
+            mock.expect("position startpos moves d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 c4d5 e6d5 c1g5 h7h6 g5h4 b8c6")
+            mock.expect("go ponder movetime 5000")
+            await protocol.play(board, chess.engine.Limit(time=5), ponder=True)
+
             mock.assert_done()
 
         asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())

From 881160ead51d3a2e6b78b747768b7a5aa047fb9a Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 15 Mar 2023 02:17:06 -0700
Subject: [PATCH 389/613] Conform play() method with opponent to test

If the opponent is changed through the play method, a new
game is started with the current board position. This includes
a blank opponent that follows an opponent specification on
a previous move.
---
 chess/engine.py | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 149b3ff21..04899790b 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1369,6 +1369,8 @@ def __init__(self) -> None:
         self.first_game = True
         self.may_ponderhit: Optional[chess.Board] = None
         self.ponderhit = False
+        self.opponent: Optional[Opponent] = None
+        self.play_opponent: Optional[Opponent] = None
 
     async def initialize(self) -> None:
         class UciInitializeCommand(BaseCommand[UciProtocol, None]):
@@ -1456,11 +1458,23 @@ def _id(self, engine: UciProtocol, arg: str) -> None:
     def _isready(self) -> None:
         self.send_line("isready")
 
-    def _ucinewgame(self, *, opponent: Optional[Opponent] = None) -> None:
-        self.send_line("ucinewgame")
-        opponent_info = self._opponent_configuration(opponent=opponent).get("UCI_Opponent") or self.config.get("UCI_Opponent")
+    def _opponent_changed(self, opponent: Optional[Opponent]) -> bool:
+        if self.play_opponent:
+            return opponent != self.play_opponent
+        elif opponent:
+            return opponent != self.opponent
+        
+        return False
+
+    def _opponent_info(self) -> None:
+        opponent = self.play_opponent or self.opponent
+        opponent_info = self._opponent_configuration(opponent=opponent).get("UCI_Opponent")
         if opponent_info:
             self.send_line(f"setoption name UCI_Opponent value {opponent_info}")
+
+    def _ucinewgame(self) -> None:
+        self.send_line("ucinewgame")
+        self._opponent_info()
         self.first_game = False
         self.ponderhit = False
 
@@ -1537,6 +1551,7 @@ def _opponent_configuration(self, *, opponent: Optional[Opponent] = None, engine
             return {}
 
     async def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
+        self.opponent = opponent
         return await self.configure(self._opponent_configuration(opponent=opponent, engine_rating=engine_rating))
 
     def _position(self, board: chess.Board) -> None:
@@ -1623,7 +1638,7 @@ def __init__(self, engine: UciProtocol):
                 # May ponderhit only in the same game and with unchanged target
                 # options. The managed options UCI_AnalyseMode, Ponder, and
                 # MultiPV never change between pondering play commands.
-                engine.may_ponderhit = board if ponder and not engine.first_game and game == engine.game and not engine._changed_options(options) else None
+                engine.may_ponderhit = board if ponder and not engine.first_game and game == engine.game and not engine._changed_options(options) and not engine._opponent_changed(opponent) else None
 
             def start(self, engine: UciProtocol) -> None:
                 self.info: InfoDict = {}
@@ -1645,9 +1660,10 @@ def start(self, engine: UciProtocol) -> None:
 
                 engine._configure(options)
 
-                if engine.first_game or engine.game != game or opponent:
+                if engine.first_game or engine.game != game or engine._opponent_changed(opponent):
                     engine.game = game
-                    engine._ucinewgame(opponent=opponent)
+                    engine.play_opponent = opponent
+                    engine._ucinewgame()
                     self.sent_isready = True
                     engine._isready()
                 else:

From 35beb1f226a2adc8751859275d7c2775d82840c8 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 15 Mar 2023 02:20:40 -0700
Subject: [PATCH 390/613] Update send_opponent_information() docstring

---
 chess/engine.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 04899790b..b0486bf48 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1134,7 +1134,9 @@ async def configure(self, options: ConfigMapping) -> None:
     async def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
         """
         Sends the engine information about its opponent. The information will
-        be sent after a new game is announced and before the first move.
+        be sent after a new game is announced and before the first move. This
+        method should be called before the first move of a game--i.e., the
+        first call to :func:`chess.engine.Protocol.play()`.
 
         :param opponent: Optional. The opponent's information.
         :param engine_rating: Optional. This engine's own rating. Only used by XBoard engines.

From 7a5f82ae250a953b42b78886f3e71a13c99f9f00 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 15 Mar 2023 23:08:49 -0700
Subject: [PATCH 391/613] Use Protocol.config to update opponent

Instead of having separate members of the UciProtocol class
incorporate new opponent information into the config
argument to simplify code.
---
 chess/engine.py | 30 ++++++++++++------------------
 1 file changed, 12 insertions(+), 18 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index b0486bf48..5fe95f960 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1371,8 +1371,6 @@ def __init__(self) -> None:
         self.first_game = True
         self.may_ponderhit: Optional[chess.Board] = None
         self.ponderhit = False
-        self.opponent: Optional[Opponent] = None
-        self.play_opponent: Optional[Opponent] = None
 
     async def initialize(self) -> None:
         class UciInitializeCommand(BaseCommand[UciProtocol, None]):
@@ -1460,17 +1458,8 @@ def _id(self, engine: UciProtocol, arg: str) -> None:
     def _isready(self) -> None:
         self.send_line("isready")
 
-    def _opponent_changed(self, opponent: Optional[Opponent]) -> bool:
-        if self.play_opponent:
-            return opponent != self.play_opponent
-        elif opponent:
-            return opponent != self.opponent
-        
-        return False
-
     def _opponent_info(self) -> None:
-        opponent = self.play_opponent or self.opponent
-        opponent_info = self._opponent_configuration(opponent=opponent).get("UCI_Opponent")
+        opponent_info = self.config.get("UCI_Opponent") or self.target_config.get("UCI_Opponent")
         if opponent_info:
             self.send_line(f"setoption name UCI_Opponent value {opponent_info}")
 
@@ -1553,7 +1542,6 @@ def _opponent_configuration(self, *, opponent: Optional[Opponent] = None, engine
             return {}
 
     async def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
-        self.opponent = opponent
         return await self.configure(self._opponent_configuration(opponent=opponent, engine_rating=engine_rating))
 
     def _position(self, board: chess.Board) -> None:
@@ -1633,6 +1621,11 @@ def _go(self, limit: Limit, *, root_moves: Optional[Iterable[chess.Move]] = None
         self.send_line(" ".join(builder))
 
     async def play(self, board: chess.Board, limit: Limit, *, game: object = None, info: Info = INFO_NONE, ponder: bool = False, draw_offered: bool = False, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}, opponent: Optional[Opponent] = None) -> PlayResult:
+        new_options: Dict[str, ConfigValue] = {}
+        for name, value in options.items():
+            new_options[name] = value
+        new_options.update(self._opponent_configuration(opponent=opponent))
+
         class UciPlayCommand(BaseCommand[UciProtocol, PlayResult]):
             def __init__(self, engine: UciProtocol):
                 super().__init__(engine)
@@ -1640,7 +1633,7 @@ def __init__(self, engine: UciProtocol):
                 # May ponderhit only in the same game and with unchanged target
                 # options. The managed options UCI_AnalyseMode, Ponder, and
                 # MultiPV never change between pondering play commands.
-                engine.may_ponderhit = board if ponder and not engine.first_game and game == engine.game and not engine._changed_options(options) and not engine._opponent_changed(opponent) else None
+                engine.may_ponderhit = board if ponder and not engine.first_game and game == engine.game and not engine._changed_options(new_options) else None
 
             def start(self, engine: UciProtocol) -> None:
                 self.info: InfoDict = {}
@@ -1653,18 +1646,19 @@ def start(self, engine: UciProtocol) -> None:
                     engine.send_line("ponderhit")
                     return
 
-                if "UCI_AnalyseMode" in engine.options and "UCI_AnalyseMode" not in engine.target_config and all(name.lower() != "uci_analysemode" for name in options):
+                if "UCI_AnalyseMode" in engine.options and "UCI_AnalyseMode" not in engine.target_config and all(name.lower() != "uci_analysemode" for name in new_options):
                     engine._setoption("UCI_AnalyseMode", False)
                 if "Ponder" in engine.options:
                     engine._setoption("Ponder", ponder)
                 if "MultiPV" in engine.options:
                     engine._setoption("MultiPV", engine.options["MultiPV"].default)
 
-                engine._configure(options)
+                new_opponent = new_options.get("UCI_Opponent") or engine.target_config.get("UCI_Opponent")
+                opponent_changed = new_opponent != engine.config.get("UCI_Opponent")
+                engine._configure(new_options)
 
-                if engine.first_game or engine.game != game or engine._opponent_changed(opponent):
+                if engine.first_game or engine.game != game or opponent_changed:
                     engine.game = game
-                    engine.play_opponent = opponent
                     engine._ucinewgame()
                     self.sent_isready = True
                     engine._isready()

From 28aa39a6b8fb64ce75e4024095995e754977b78b Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 16 Mar 2023 00:09:31 -0700
Subject: [PATCH 392/613] Remove options handled by Opponent class

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 5fe95f960..80b757858 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2106,7 +2106,7 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping, opponen
 
         # Set up starting position.
         root = board.root()
-        new_options = any(param in options for param in ("random", "computer", "name", "engine_rating", "opponent_rating"))
+        new_options = any(param in options for param in ("random", "computer"))
         new_game = self.first_game or self.game != game or new_options or opponent or root != self.board.root()
         self.game = game
         self.first_game = False

From 191a1c1f8c1b41f20f35fb757148f7fafab00869 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 16 Mar 2023 00:10:06 -0700
Subject: [PATCH 393/613] XBoard engines don't have to support name option

---
 chess/engine.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 80b757858..4b7b4b976 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1993,7 +1993,6 @@ def __init__(self) -> None:
         self.options = {
             "random": Option("random", "check", False, None, None, None),
             "computer": Option("computer", "check", False, None, None, None),
-            "name": Option("name", "string", "", None, None, None),
             "engine_rating": Option("engine_rating", "spin", 0, None, None, None),
             "opponent_rating": Option("opponent_rating", "spin", 0, None, None, None)
         }

From 3685db1634d545b5198438192687ee0b3ecd8539 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 16 Mar 2023 00:16:54 -0700
Subject: [PATCH 394/613] Protocol.target_config contains current opponent

---
 chess/engine.py | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 4b7b4b976..c99aa49a9 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2122,15 +2122,15 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping, opponen
             if self.config.get("random"):
                 self.send_line("random")
             
-            opponent_name = (opponent.name if opponent else None) or self.config.get("name")
+            opponent_name = (opponent.name if opponent else None) or self.target_config.get("name")
             if opponent_name and self.features.get("name", True):
-                self.send_line(f"name {self.config['name']}")
+                self.send_line(f"name {opponent_name}")
 
-            opponent_rating = (opponent.rating if opponent else None) or self.config.get("opponent_rating") or 0
-            if self.config.get("engine_rating") or opponent_rating:
-                self.send_line(f"rating {self.config.get('engine_rating') or 0} {opponent_rating}")
+            opponent_rating = (opponent.rating if opponent else None) or self.target_config.get("opponent_rating") or 0
+            if self.target_config.get("engine_rating") or opponent_rating:
+                self.send_line(f"rating {self.target_config.get('engine_rating') or 0} {opponent_rating}")
 
-            if (opponent and opponent.is_engine) or self.config.get("computer"):
+            if (opponent and opponent.is_engine) or (self.target_config.get("computer") if self.config.get("computer") is None else self.config.get("computer")):
                 self.send_line("computer")
 
         self.send_line("force")

From da4106369ccf13b9399e262d5757feb219041a47 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 16 Mar 2023 00:50:56 -0700
Subject: [PATCH 395/613] Revert "XBoard engines don't have to support name
 option"

This reverts commit 191a1c1f8c1b41f20f35fb757148f7fafab00869.

The default is that XBoard engines accept the "name" feature.
---
 chess/engine.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/chess/engine.py b/chess/engine.py
index c99aa49a9..c3b863032 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1993,6 +1993,7 @@ def __init__(self) -> None:
         self.options = {
             "random": Option("random", "check", False, None, None, None),
             "computer": Option("computer", "check", False, None, None, None),
+            "name": Option("name", "string", "", None, None, None),
             "engine_rating": Option("engine_rating", "spin", 0, None, None, None),
             "opponent_rating": Option("opponent_rating", "spin", 0, None, None, None)
         }

From 87ec56a9473a5074a89a592e0a2e68664795bdc6 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 16 Mar 2023 00:52:29 -0700
Subject: [PATCH 396/613] Test sending opponent information to XBoard engine

---
 test.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test.py b/test.py
index a9dd5d89b..42f77ea68 100755
--- a/test.py
+++ b/test.py
@@ -3542,8 +3542,14 @@ async def main():
             board.push_san("d4")
             board.push_san("Nf6")
             board.push_san("c4")
+            opponent = chess.engine.Opponent("Turk", None, 2100, True)
+            engine_rating = 3600
+            await protocol.send_opponent_information(opponent=opponent, engine_rating=engine_rating)
 
             mock.expect("new")
+            mock.expect("name Turk")
+            mock.expect("rating 3600 2100")
+            mock.expect("computer")
             mock.expect("force")
             mock.expect("d2d4")
             mock.expect("g8f6")

From a904617d389e0f179f24ab8e5b4b327d7bf15cdd Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 16 Mar 2023 23:00:54 -0700
Subject: [PATCH 397/613] Complete opponent information

---
 test.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test.py b/test.py
index 42f77ea68..f0ba7d9dc 100755
--- a/test.py
+++ b/test.py
@@ -3542,12 +3542,12 @@ async def main():
             board.push_san("d4")
             board.push_san("Nf6")
             board.push_san("c4")
-            opponent = chess.engine.Opponent("Turk", None, 2100, True)
+            opponent = chess.engine.Opponent("Turk", "Mechanical", 2100, True)
             engine_rating = 3600
             await protocol.send_opponent_information(opponent=opponent, engine_rating=engine_rating)
 
             mock.expect("new")
-            mock.expect("name Turk")
+            mock.expect("name Mechanical Turk")
             mock.expect("rating 3600 2100")
             mock.expect("computer")
             mock.expect("force")

From 06e314531a6c653c537921faf70c2dce2813a57a Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 16 Mar 2023 23:16:31 -0700
Subject: [PATCH 398/613] Move XBoard opponent tests to own method

---
 test.py | 55 +++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 49 insertions(+), 6 deletions(-)

diff --git a/test.py b/test.py
index f0ba7d9dc..56843fde1 100755
--- a/test.py
+++ b/test.py
@@ -3542,14 +3542,8 @@ async def main():
             board.push_san("d4")
             board.push_san("Nf6")
             board.push_san("c4")
-            opponent = chess.engine.Opponent("Turk", "Mechanical", 2100, True)
-            engine_rating = 3600
-            await protocol.send_opponent_information(opponent=opponent, engine_rating=engine_rating)
 
             mock.expect("new")
-            mock.expect("name Mechanical Turk")
-            mock.expect("rating 3600 2100")
-            mock.expect("computer")
             mock.expect("force")
             mock.expect("d2d4")
             mock.expect("g8f6")
@@ -3595,6 +3589,55 @@ async def main():
         asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
+    def test_xboard_opponent(self):
+        async def main():
+            protocol = chess.engine.XBoardProtocol()
+            mock = chess.engine.MockTransport(protocol)
+
+            mock.expect("xboard")
+            mock.expect("protover 2", ["feature ping=1 setboard=1 name=1 done=1"])
+            await protocol.initialize()
+            mock.assert_done()
+
+            limit = chess.engine.Limit(time=5)
+            board = chess.Board()
+            opponent = chess.engine.Opponent("Turk", "Mechanical", 2100, True)
+            await protocol.send_opponent_information(opponent=opponent, engine_rating=3600)
+
+            mock.expect("new")
+            mock.expect("name Mechanical Turk")
+            mock.expect("rating 3600 2100")
+            mock.expect("computer")
+            mock.expect("force")
+            mock.expect("st 5")
+            mock.expect("nopost")
+            mock.expect("easy")
+            mock.expect("go", ["move e2e4"])
+            mock.expect_ping()
+            result = await protocol.play(board, limit, game="game")
+            self.assertEqual(result.move, board.parse_san("e4"))
+            mock.assert_done()
+
+            new_opponent = chess.engine.Opponent("Turochamp", None, 800, True)
+            board.push(result.move)
+            mock.expect("new")
+            mock.expect("name Turochamp")
+            mock.expect("rating 3600 800")
+            mock.expect("computer")
+            mock.expect("force")
+            mock.expect("e2e4")
+            mock.expect("st 5")
+            mock.expect("nopost")
+            mock.expect("easy")
+            mock.expect("go", ["move e7e5"])
+            mock.expect_ping()
+            result = await protocol.play(board, limit, game="game", opponent=new_opponent)
+            self.assertEqual(result.move, board.parse_san("e5"))
+            mock.assert_done()
+
+        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
+        asyncio.run(main())
+
     def test_xboard_analyse(self):
         async def main():
             protocol = chess.engine.XBoardProtocol()

From 7d670a489ae0da06f4a9275f82fcfbd42979bb6e Mon Sep 17 00:00:00 2001
From: snowdrop4 <82846066+snowdrop4@users.noreply.github.com>
Date: Thu, 30 Mar 2023 14:04:14 +0100
Subject: [PATCH 399/613] add BaseVisitor.begin_parse_san() method

---
 chess/pgn.py | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 8750443c5..553b6ece6 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -1043,6 +1043,13 @@ def end_headers(self) -> Optional[SkipType]:
         """Called after visiting game headers."""
         pass
 
+    def begin_parse_san(self, board: chess.Board, san: str) -> Optional[SkipType]:
+        """
+        When the visitor is used by a parser, this is called at the start of
+        each standard algebraic notation detailing a move.
+        """
+        pass
+
     def parse_san(self, board: chess.Board, san: str) -> chess.Move:
         """
         When the visitor is used by a parser, this is called to parse a move
@@ -1682,14 +1689,15 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any:
                 visitor.visit_result(token)
             else:
                 # Parse SAN tokens.
-                try:
-                    move = visitor.parse_san(board_stack[-1], token)
-                except ValueError as error:
-                    visitor.handle_error(error)
-                    skip_variation_depth = 1
-                else:
-                    visitor.visit_move(board_stack[-1], move)
-                    board_stack[-1].push(move)
+                if visitor.begin_parse_san(board_stack[-1], token) is not SKIP:
+                    try:
+                        move = visitor.parse_san(board_stack[-1], token)
+                    except ValueError as error:
+                        visitor.handle_error(error)
+                        skip_variation_depth = 1
+                    else:
+                        visitor.visit_move(board_stack[-1], move)
+                        board_stack[-1].push(move)
                 visitor.visit_board(board_stack[-1])
 
         if fresh_line:

From 039239718d4137c1b37cc212238303c27829c957 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 31 Mar 2023 18:20:19 +0200
Subject: [PATCH 400/613] Add another insufficient material test

---
 test.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test.py b/test.py
index 56843fde1..0ca635d43 100755
--- a/test.py
+++ b/test.py
@@ -579,6 +579,7 @@ def _check(board, white, black):
         _check(chess.variant.CrazyhouseBoard("8/8/8/8/3k4/3N~4/3K4/8 w - - 0 1"), False, False)
 
         _check(chess.variant.HordeBoard("8/5k2/8/8/8/4NN2/8/8 w - - 0 1"), True, False)
+        _check(chess.variant.HordeBoard("8/1b5r/1P6/1Pk3q1/1PP5/r1P5/P1P5/2P5 b - - 0 52"), False, False)
 
     def test_promotion_with_check(self):
         board = chess.Board("8/6P1/2p5/1Pqk4/6P1/2P1RKP1/4P1P1/8 w - - 0 1")

From 12c6211360a36fce4cd1f324b76a2caa54a091e1 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 31 Mar 2023 18:42:59 +0200
Subject: [PATCH 401/613] Revert default Syzygy max_fds to 128

Python's mmap.mmap() actually (unnecessarily, with regard to our use
case) duplicates the file descriptor and keeps a copy around for the
lifetime of the memory map.
---
 chess/syzygy.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/syzygy.py b/chess/syzygy.py
index 45eb963d0..2d835b200 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -1483,7 +1483,7 @@ class Tablebase:
     """
     Manages a collection of tablebase files for probing.
     """
-    def __init__(self, *, max_fds: Optional[int] = None, VariantBoard: Type[chess.Board] = chess.Board) -> None:
+    def __init__(self, *, max_fds: Optional[int] = 128, VariantBoard: Type[chess.Board] = chess.Board) -> None:
         self.variant = VariantBoard
 
         self.max_fds = max_fds
@@ -1963,7 +1963,7 @@ def __exit__(self, exc_type: Optional[Type[BaseException]], exc_value: Optional[
         self.close()
 
 
-def open_tablebase(directory: str, *, load_wdl: bool = True, load_dtz: bool = True, max_fds: Optional[int] = None, VariantBoard: Type[chess.Board] = chess.Board) -> Tablebase:
+def open_tablebase(directory: str, *, load_wdl: bool = True, load_dtz: bool = True, max_fds: Optional[int] = 128, VariantBoard: Type[chess.Board] = chess.Board) -> Tablebase:
     """
     Opens a collection of tables for probing. See
     :class:`~chess.syzygy.Tablebase`.

From 363672783357ccfafb23a6917953ad4d61219047 Mon Sep 17 00:00:00 2001
From: Trevor Bayless 
Date: Fri, 31 Mar 2023 13:22:13 -0500
Subject: [PATCH 402/613] Add cli-chess

---
 README.rst                |   5 +++++
 docs/images/cli-chess.png | Bin 0 -> 3570 bytes
 2 files changed, 5 insertions(+)
 create mode 100644 docs/images/cli-chess.png

diff --git a/README.rst b/README.rst
index aae81e788..cbacf299e 100644
--- a/README.rst
+++ b/README.rst
@@ -331,6 +331,11 @@ If you like, share interesting things you are using python-chess for, for exampl
 |     :height: 64                                                                                      |                                                                                              |
 |     :target: https://pettingzoo.farama.org/environments/classic/chess/                               | A multi-agent reinforcement learning environment                                             |
 +------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
+| .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/cli-chess.png?raw=true    | `cli-chess `_                                    |
+|     :width: 64                                                                                       |                                                                                              |
+|     :height: 64                                                                                      |                                                                                              |
+|     :target: https://github.com/trevorbayless/cli-chess                                              | A highly customizable way to play chess in your terminal                                     |
++------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
 
 * extensions to build engines (search and evaluation) – https://github.com/Mk-Chan/python-chess-engine-extensions
 * a stand-alone chess computer based on DGT board – http://www.picochess.org/
diff --git a/docs/images/cli-chess.png b/docs/images/cli-chess.png
new file mode 100644
index 0000000000000000000000000000000000000000..eaa7ff306749f925727ab7e958e4893309e2ca52
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zCnpmhAJ6&o=h?7fgU`wXJpTCOY~8w*)YMeIx?tnm_MyXIgjPZ7)gfa?z|y5lQ79A~
zIBglT*wLoJ
zMy2Y!UauY&0dBw(Lj#Ha^}&HAJ2*HP0Eb%)ivTmgoH=s>PC#R0BOM(bBqt|x(@i%8
z?QQUFI9SESR^@FEI_K&e!sR;%gl?e%)C(Qsk6+v)D^Mgk0~
zE4sLoGO!OgrBEn%I~3On|-*C;tlc
se`^*3{1*5H5XAo<%)oxY^TFbO06cqLazxc|uK)l507*qoM6N<$f
Date: Fri, 7 Apr 2023 19:46:12 -0400
Subject: [PATCH 403/613] Add square_manhattan_distance and
 square_knight_distance

---
 chess/__init__.py | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index e205bba8e..d6ef1d153 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -218,10 +218,41 @@ def square_rank(square: Square) -> int:
 
 def square_distance(a: Square, b: Square) -> int:
     """
-    Gets the distance (i.e., the number of king steps) from square *a* to *b*.
+    Gets the Chebyshev distance (i.e., the number of king steps) from square *a* to *b*.
     """
+    if a == b:
+        return 0;
     return max(abs(square_file(a) - square_file(b)), abs(square_rank(a) - square_rank(b)))
 
+def square_manhattan_distance(a: Square, b: Square) -> int:
+    """
+    Gets the Manhattan/Taxicab distance (i.e., the number of orthogonal king steps) from square *a* to *b*.
+    """
+    if a == b:
+        return 0;
+    return abs(square_file(a) - square_file(b)) + abs(square_rank(a) - square_rank(b))
+
+def square_knight_distance(a: Square, b: Square) -> int:
+    """
+    Gets the Knight distance (i.e., the number of knight moves) from square *a* to *b*.
+    """
+    if a == b:
+        return 0;
+
+    dx = abs(square_file(a) - square_file(b))
+    dy = abs(square_rank(a) - square_rank(b))
+
+    if dx + dy == 1:
+        return 3
+    elif dx == dy == 2:
+        return 4
+    elif dx == dy == 1:
+        if 1 << a & BB_CORNERS or 1 << b & BB_CORNERS: # Special case only for corner squares
+            return 4
+
+    m = math.ceil(max(dx / 2, dy / 2, (dx + dy) / 3))
+    return m + ((m + dx + dy) % 2)
+
 def square_mirror(square: Square) -> Square:
     """Mirrors the square vertically."""
     return square ^ 0x38

From 9cc4372dce66eb4757eb3ae9adc676e3965a152e Mon Sep 17 00:00:00 2001
From: AInnuganti <130129680+AInnuganti@users.noreply.github.com>
Date: Sun, 9 Apr 2023 14:42:34 -0400
Subject: [PATCH 404/613] Made requested changes

---
 chess/__init__.py | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index d6ef1d153..980dc34b4 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -220,25 +220,18 @@ def square_distance(a: Square, b: Square) -> int:
     """
     Gets the Chebyshev distance (i.e., the number of king steps) from square *a* to *b*.
     """
-    if a == b:
-        return 0;
     return max(abs(square_file(a) - square_file(b)), abs(square_rank(a) - square_rank(b)))
 
 def square_manhattan_distance(a: Square, b: Square) -> int:
     """
     Gets the Manhattan/Taxicab distance (i.e., the number of orthogonal king steps) from square *a* to *b*.
     """
-    if a == b:
-        return 0;
     return abs(square_file(a) - square_file(b)) + abs(square_rank(a) - square_rank(b))
 
 def square_knight_distance(a: Square, b: Square) -> int:
     """
     Gets the Knight distance (i.e., the number of knight moves) from square *a* to *b*.
     """
-    if a == b:
-        return 0;
-
     dx = abs(square_file(a) - square_file(b))
     dy = abs(square_rank(a) - square_rank(b))
 
@@ -247,7 +240,7 @@ def square_knight_distance(a: Square, b: Square) -> int:
     elif dx == dy == 2:
         return 4
     elif dx == dy == 1:
-        if 1 << a & BB_CORNERS or 1 << b & BB_CORNERS: # Special case only for corner squares
+        if BB_SQUARES[a] & BB_CORNERS or BB_SQUARES[b] & BB_CORNERS: # Special case only for corner squares
             return 4
 
     m = math.ceil(max(dx / 2, dy / 2, (dx + dy) / 3))

From a2f1588e20123f946b1eaf98492b35e87739e26d Mon Sep 17 00:00:00 2001
From: AInnuganti <130129680+AInnuganti@users.noreply.github.com>
Date: Sat, 15 Apr 2023 23:32:50 -0400
Subject: [PATCH 405/613] Add tests for new distance functions

---
 test.py | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/test.py b/test.py
index 0ca635d43..17dec2916 100755
--- a/test.py
+++ b/test.py
@@ -93,6 +93,31 @@ def test_parse_square(self):
         with self.assertRaises(ValueError):
             self.assertEqual(chess.parse_square("a0"))
 
+    def test_square_distance(self):
+        self.assertEqual(chess.square_distance(chess.A1, chess.A1), 0)
+        self.assertEqual(chess.square_distance(chess.A1, chess.H8), 7)
+        self.assertEqual(chess.square_distance(chess.E1, chess.E8), 7)
+        self.assertEqual(chess.square_distance(chess.A4, chess.H4), 7)
+        self.assertEqual(chess.square_distance(chess.D4, chess.E5), 1)
+
+    def test_square_manhattan_distance(self):
+        self.assertEqual(chess.square_manhattan_distance(chess.A1, chess.A1), 0)
+        self.assertEqual(chess.square_manhattan_distance(chess.A1, chess.H8), 14)
+        self.assertEqual(chess.square_manhattan_distance(chess.E1, chess.E8), 7)
+        self.assertEqual(chess.square_manhattan_distance(chess.A4, chess.H4), 7)
+        self.assertEqual(chess.square_manhattan_distance(chess.D4, chess.E5), 2)
+
+    def test_square_knight_distance(self):
+        self.assertEqual(chess.square_knight_distance(chess.A1, chess.A1), 0)
+        self.assertEqual(chess.square_knight_distance(chess.A1, chess.H8), 6)
+        self.assertEqual(chess.square_knight_distance(chess.G1, chess.F3), 1)
+        self.assertEqual(chess.square_knight_distance(chess.E1, chess.E8), 5)
+        self.assertEqual(chess.square_knight_distance(chess.A4, chess.H4), 5)
+        self.assertEqual(chess.square_knight_distance(chess.A1, chess.B1), 3)
+        self.assertEqual(chess.square_knight_distance(chess.A1, chess.C3), 4)
+        self.assertEqual(chess.square_knight_distance(chess.A1, chess.B2), 4)
+        self.assertEqual(chess.square_knight_distance(chess.C1, chess.B2), 2)
+
 
 class MoveTestCase(unittest.TestCase):
 

From d5da1d5849fdd85f7fc19d49d57cc38729906e6a Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 16 Apr 2023 09:42:15 +0200
Subject: [PATCH 406/613] Add new distance functions to docs (#986)

---
 docs/core.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs/core.rst b/docs/core.rst
index d5790820a..8bb045bbb 100644
--- a/docs/core.rst
+++ b/docs/core.rst
@@ -85,6 +85,10 @@ and so on to
 
 .. autofunction:: chess.square_distance
 
+.. autofunction:: chess.square_manhattan_distance
+
+.. autofunction:: chess.square_knight_distance
+
 .. autofunction:: chess.square_mirror
 
 Pieces

From bd371f68b631499d9107c20f1f785b111c547f62 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 22 Apr 2023 20:43:01 +0200
Subject: [PATCH 407/613] Remove SVG version and baseProfile

https://github.com/niklasf/python-chess/discussions/992
---
 chess/svg.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/chess/svg.py b/chess/svg.py
index 008b0c87c..94ae21569 100644
--- a/chess/svg.py
+++ b/chess/svg.py
@@ -169,8 +169,6 @@ def _svg(viewbox: int, size: Optional[int]) -> ET.Element:
     svg = ET.Element("svg", {
         "xmlns": "http://www.w3.org/2000/svg",
         "xmlns:xlink": "http://www.w3.org/1999/xlink",
-        "version": "1.2",
-        "baseProfile": "tiny",
         "viewBox": f"0 0 {viewbox:d} {viewbox:d}",
     })
 

From dc2e284e9ddf909720a2bbe32e994269d4168244 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Mon, 24 Apr 2023 20:58:29 -0700
Subject: [PATCH 408/613] Send the final result of a game to engines

UCI engines receive the final board position.

Xboard engines receive the final move of the game and a
message describing the winner and reason for the game
ending.
---
 chess/engine.py | 68 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/chess/engine.py b/chess/engine.py
index c3b863032..afb4c9d8a 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1246,6 +1246,27 @@ async def analysis(self, board: chess.Board, limit: Optional[Limit] = None, *, m
         and stopping the analysis at any time.
         """
 
+    @abc.abstractmethod
+    async def send_game_result(self, board: chess.Board, winner: Optional[Color] = None, game_ending: Optional[str] = None, game_complete: bool = True) -> None:
+        """
+        Sends the engine the result of the game.
+
+        UCI engines only recieve the final position of the board. XBoard engines
+        receive the final moves and a line of the form "result  {}",
+        where  is one of "1-0", "0-1", "1/2-1/2", or "*" to indicate white
+        won, black won, draw, or adjournment, respectively.
+
+        :param board: The final state of the board.
+        :param winner: Optional. Specify the winner of the game. This is useful
+            if the result of the game is not evident from the board--e.g., time
+            forfeiture or draw by agreement.
+        :param game_ending: Optional. Text describing the reason for the game
+            ending. Similarly to the winner paramter, this overrides any game
+            result derivable from the board.
+        :param game_complete: Optional. Whether the game is complete or may resume
+            at a later time.
+        """
+
     @abc.abstractmethod
     async def quit(self) -> None:
         """Asks the engine to shut down."""
@@ -1797,6 +1818,15 @@ def engine_terminated(self, engine: UciProtocol, exc: Exception) -> None:
 
         return await self.communicate(UciAnalysisCommand)
 
+    async def send_game_result(self, board: chess.Board, winner: Optional[Color] = None, game_ending: Optional[str] = None, game_complete: bool = True) -> None:
+        class UciGameResultCommand(BaseCommand[UciProtocol, None]):
+            def start(self, engine: UciProtocol) -> None:
+                engine._position(board)  # Send final board position
+                self.result.set_result(None)
+                self.set_finished()
+
+        return await self.communicate(UciGameResultCommand)
+
     async def quit(self) -> None:
         self.send_line("quit")
         await asyncio.shield(self.returncode)
@@ -2477,6 +2507,38 @@ def _opponent_configuration(self, *, opponent: Optional[Opponent] = None, engine
     async def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
         return await self.configure(self._opponent_configuration(opponent=opponent, engine_rating=engine_rating))
 
+    async def send_game_result(self, board: chess.Board, winner: Optional[Color] = None, game_ending: Optional[str] = None, game_complete: bool = True) -> None:
+        class XBoardGameResultCommand(BaseCommand[XBoardProtocol, None]):
+            def start(self, engine: XBoardProtocol) -> None:
+                engine._new(board, engine.game, {})  # Send final moves to engine.
+                
+                outcome = board.outcome(claim_draw=True)
+
+                if not game_complete:
+                    result = "*"
+                    ending = game_ending or "Game adjourned"
+                elif winner is not None or game_ending:
+                    result = "1-0" if winner == chess.WHITE else ("0-1" if winner == chess.BLACK else "1/2-1/2")
+                    ending = game_ending or ""
+                elif outcome is not None and outcome.winner is not None:
+                    result = outcome.result()
+                    winning_color = "White" if outcome.winner == chess.WHITE else "Black"
+                    is_checkmate = outcome.termination == chess.Termination.CHECKMATE
+                    ending = f"{winning_color} {'mates' if is_checkmate else 'variant win'}"
+                elif outcome is not None:
+                    result = outcome.result()
+                    ending = outcome.termination.name.capitalize().replace("_", " ")
+                else:
+                    result = "*"
+                    ending = ""
+
+                ending_text = f"{{{ending}}}" if ending else ""
+                engine.send_line(f"result {result} {ending_text}".strip())
+                self.result.set_result(None)
+                self.set_finished()
+
+        return await self.communicate(XBoardGameResultCommand)
+
     async def quit(self) -> None:
         self.send_line("quit")
         await asyncio.shield(self.returncode)
@@ -2904,6 +2966,12 @@ def analysis(self, board: chess.Board, limit: Optional[Limit] = None, *, multipv
             future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)
         return SimpleAnalysisResult(self, future.result())
 
+    def send_game_result(self, board: chess.Board, winner: Optional[Color] = None, game_ending: Optional[str] = None, game_complete: bool = True) -> None:
+        with self._not_shut_down():
+            coro = asyncio.wait_for(self.protocol.send_game_result(board, winner, game_ending, game_complete), self.timeout)
+            future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)
+        return future.result()
+
     def quit(self) -> None:
         with self._not_shut_down():
             coro = asyncio.wait_for(self.protocol.quit(), self.timeout)

From 91996e2d9043a8eab3885e1fa30cd93ec5da80b2 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Tue, 25 Apr 2023 21:14:26 -0700
Subject: [PATCH 409/613] Do nothing for UCI engines

UCI engines do not expect to get a message once a game ends.
---
 chess/engine.py | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index afb4c9d8a..75dd3633b 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1819,13 +1819,7 @@ def engine_terminated(self, engine: UciProtocol, exc: Exception) -> None:
         return await self.communicate(UciAnalysisCommand)
 
     async def send_game_result(self, board: chess.Board, winner: Optional[Color] = None, game_ending: Optional[str] = None, game_complete: bool = True) -> None:
-        class UciGameResultCommand(BaseCommand[UciProtocol, None]):
-            def start(self, engine: UciProtocol) -> None:
-                engine._position(board)  # Send final board position
-                self.result.set_result(None)
-                self.set_finished()
-
-        return await self.communicate(UciGameResultCommand)
+        pass
 
     async def quit(self) -> None:
         self.send_line("quit")

From ee210f4a9fbc9286863b3f495259708b95bd7846 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Tue, 25 Apr 2023 21:15:00 -0700
Subject: [PATCH 410/613] Make default message for incomplete game blank

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 75dd3633b..314dfc753 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2510,7 +2510,7 @@ def start(self, engine: XBoardProtocol) -> None:
 
                 if not game_complete:
                     result = "*"
-                    ending = game_ending or "Game adjourned"
+                    ending = game_ending or ""
                 elif winner is not None or game_ending:
                     result = "1-0" if winner == chess.WHITE else ("0-1" if winner == chess.BLACK else "1/2-1/2")
                     ending = game_ending or ""

From f4d73525c97d4a4aa604481b4e8a37b55fb2caf8 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Tue, 25 Apr 2023 21:45:48 -0700
Subject: [PATCH 411/613] Tests for sending game result

---
 test.py | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)

diff --git a/test.py b/test.py
index 17dec2916..b52f38590 100755
--- a/test.py
+++ b/test.py
@@ -3664,6 +3664,80 @@ async def main():
         asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
+    def test_xboard_result(self):
+        async def main():
+            protocol = chess.engine.XBoardProtocol()
+            mock = chess.engine.MockTransport(protocol)
+
+            mock.expect("xboard")
+            mock.expect("protover 2", ["feature ping=1 setboard=1 done=1"])
+            await protocol.initialize()
+            mock.assert_done()
+
+            limit = chess.engine.Limit(time=5)
+            checkmate_board = chess.Board("k7/7R/6R1/8/8/8/8/K7 w - - 0 1")
+
+            mock.expect("new")
+            mock.expect("force")
+            mock.expect("setboard k7/7R/6R1/8/8/8/8/K7 w - - 0 1")
+            mock.expect("st 5")
+            mock.expect("nopost")
+            mock.expect("easy")
+            mock.expect("go", ["move g6g8"])
+            mock.expect_ping()
+            mock.expect("force")
+            mock.expect("result 1-0 {White mates}")
+            result = await protocol.play(checkmate_board, limit, game="checkmate")
+            self.assertEqual(result.move, checkmate_board.parse_uci("g6g8"))
+            checkmate_board.push(result.move)
+            self.assertTrue(checkmate_board.is_checkmate())
+            await protocol.send_game_result(checkmate_board)
+            mock.assert_done()
+
+            unfinished_board = chess.Board()
+            mock.expect("new")
+            mock.expect("force")
+            mock.expect("st 5")
+            mock.expect("nopost")
+            mock.expect("easy")
+            mock.expect("go", ["move e2e4"])
+            mock.expect_ping()
+            mock.expect("force")
+            mock.expect("result *")
+            result = await protocol.play(unfinished_board, limit, game="unfinished")
+            self.assertEqual(result.move, unfinished_board.parse_uci("e2e4"))
+            unfinished_board.push(result.move)
+            await protocol.send_game_result(unfinished_board, game_complete=False)
+            mock.assert_done()
+
+            timeout_board = chess.Board()
+            mock.expect("new")
+            mock.expect("force")
+            mock.expect("st 5")
+            mock.expect("nopost")
+            mock.expect("easy")
+            mock.expect("go", ["move e2e4"])
+            mock.expect_ping()
+            mock.expect("force")
+            mock.expect("result 0-1 {Time forfeiture}")
+            result = await protocol.play(timeout_board, limit, game="timeout")
+            self.assertEqual(result.move, timeout_board.parse_uci("e2e4"))
+            timeout_board.push(result.move)
+            await protocol.send_game_result(timeout_board, chess.BLACK, "Time forfeiture")
+            mock.assert_done()
+
+            material_board = chess.Board("k7/8/8/8/8/8/8/K7 b - - 0 1")
+            self.assertTrue(material_board.is_insufficient_material())
+            mock.expect("new")
+            mock.expect("force")
+            mock.expect("setboard k7/8/8/8/8/8/8/K7 b - - 0 1")
+            mock.expect("result 1/2-1/2 {Insufficient material}")
+            await protocol.send_game_result(material_board)
+            mock.assert_done()
+
+        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
+        asyncio.run(main())
+
     def test_xboard_analyse(self):
         async def main():
             protocol = chess.engine.XBoardProtocol()

From e5d8c6d9232037e616ee8a540ea73b3247560049 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Tue, 25 Apr 2023 21:48:34 -0700
Subject: [PATCH 412/613] Edit parameter comment

---
 chess/engine.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 314dfc753..0f91bca3f 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1263,8 +1263,7 @@ async def send_game_result(self, board: chess.Board, winner: Optional[Color] = N
         :param game_ending: Optional. Text describing the reason for the game
             ending. Similarly to the winner paramter, this overrides any game
             result derivable from the board.
-        :param game_complete: Optional. Whether the game is complete or may resume
-            at a later time.
+        :param game_complete: Optional. Whether the game reached completion.
         """
 
     @abc.abstractmethod

From 0512fe01c32cef2bdcbb46d9afe15ecae98eadd4 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Tue, 25 Apr 2023 22:42:56 -0700
Subject: [PATCH 413/613] Add test for do-nothing UCI send_game_result()

---
 test.py | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/test.py b/test.py
index b52f38590..fd3b93ed8 100755
--- a/test.py
+++ b/test.py
@@ -3465,6 +3465,32 @@ def test_uci_info(self):
         info = chess.engine._parse_uci_info("depth 1 seldepth 2 time 16 nodes 1 score cp 72 wdl 249 747 4 hashfull 0 nps 400 tbhits 0 multipv 1", board)
         self.assertEqual(info["wdl"], (249, 747, 4))
 
+    def test_uci_result(self):
+        async def main():
+            protocol = chess.engine.UciProtocol()
+            mock = chess.engine.MockTransport(protocol)
+
+            mock.expect("uci", ["uciok"])
+            await protocol.initialize()
+            mock.assert_done()
+
+            limit = chess.engine.Limit(time=5)
+            checkmate_board = chess.Board("k7/7R/6R1/8/8/8/8/K7 w - - 0 1")
+
+            mock.expect("ucinewgame")
+            mock.expect("isready", ["readyok"])
+            mock.expect("position fen k7/7R/6R1/8/8/8/8/K7 w - - 0 1")
+            mock.expect("go movetime 5000", ["bestmove g6g8"])
+            result = await protocol.play(checkmate_board, limit, game="checkmate")
+            self.assertEqual(result.move, checkmate_board.parse_uci("g6g8"))
+            checkmate_board.push(result.move)
+            self.assertTrue(checkmate_board.is_checkmate())
+            await protocol.send_game_result(checkmate_board)
+            mock.assert_done()
+
+        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
+        asyncio.run(main())
+
     def test_hiarcs_bestmove(self):
         async def main():
             protocol = chess.engine.UciProtocol()

From 885d59f708423fd3a1f18ae1fb9a35532dc51293 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Tue, 25 Apr 2023 22:48:10 -0700
Subject: [PATCH 414/613] Delete unneeded parentheses

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 0f91bca3f..ae33db688 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2511,7 +2511,7 @@ def start(self, engine: XBoardProtocol) -> None:
                     result = "*"
                     ending = game_ending or ""
                 elif winner is not None or game_ending:
-                    result = "1-0" if winner == chess.WHITE else ("0-1" if winner == chess.BLACK else "1/2-1/2")
+                    result = "1-0" if winner == chess.WHITE else "0-1" if winner == chess.BLACK else "1/2-1/2"
                     ending = game_ending or ""
                 elif outcome is not None and outcome.winner is not None:
                     result = outcome.result()

From 622f3a0b8cbf7098082dca20f86d98a2a5e5f171 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 29 Apr 2023 23:42:00 +0200
Subject: [PATCH 415/613] Add perft with impossible castling rights

---
 examples/perft/tricky.perft | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/examples/perft/tricky.perft b/examples/perft/tricky.perft
index b3cca9fd2..6a572a330 100644
--- a/examples/perft/tricky.perft
+++ b/examples/perft/tricky.perft
@@ -129,3 +129,15 @@ epd rnbqk1nr/bb3p1p/1q2r3/2pPp3/3P4/7P/1PP1NpPP/R1BQKBNR w KQkq c6
 perft 1 2
 perft 2 92
 perft 3 2528
+
+#
+# Impossible castling rights
+#
+
+id asymmetrical-and-king-on-h
+epd r2r3k/p7/3p4/8/8/P6P/8/R3K2R b KQq -
+perft 1 14
+perft 2 206
+perft 3 3672
+perft 4 64639
+perft 5 1320962

From 4889834dc0f1a2eb7f56440c87d4d1490c5f3f4b Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sat, 29 Apr 2023 21:47:08 -0700
Subject: [PATCH 416/613] Add optional identifier to Limit instances

This new field in the Limit class is used to signal when the time
control for a game has changed. XBoard engines expect to
receive a `level` or `st` command to indicate the time control
at the start of the game, and then only `time` and `otim`
commands before each subsequent move to update the engine's
internal clocks. The `level` and `st` commands should only be
resent when the time control changes--like in FIDE tournament
time controls. During a single time control, the same `clock_id`
should be used for every Limit instance. This field has a similar
function to the `game` parameter of the `play()` method.
---
 chess/engine.py | 25 +++++++++++++++++++------
 test.py         | 21 +++++++++++++++++++--
 2 files changed, 38 insertions(+), 8 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index c3b863032..722d2be36 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -332,6 +332,14 @@ class Limit:
     *white_clock* and *black_clock* are, then it is sudden death.
     """
 
+    clock_id: object = None
+    """
+    An identifier to use with XBoard engines to signal that the time
+    control has changed. When this field changes, Xboard engines are
+    send level or st commands as appropriate. Otherwise, only time
+    and otim commands are sent to update the engine's clock.
+    """
+
     def __repr__(self) -> str:
         # Like default __repr__, but without None values.
         return "{}({})".format(
@@ -2001,6 +2009,7 @@ def __init__(self) -> None:
         self.target_config: Dict[str, ConfigValue] = {}
         self.board = chess.Board()
         self.game: object = None
+        self.clock_id: object = None
         self.first_game = True
 
     async def initialize(self) -> None:
@@ -2202,10 +2211,9 @@ def start(self, engine: XBoardProtocol) -> None:
                 # Limit or time control.
                 clock = limit.white_clock if board.turn else limit.black_clock
                 increment = limit.white_inc if board.turn else limit.black_inc
-                if limit.remaining_moves or clock is not None or increment is not None:
-                    base_mins, base_secs = divmod(int(clock or 0), 60)
-                    engine.send_line(f"level {limit.remaining_moves or 0} {base_mins}:{base_secs:02d} {increment or 0}")
-
+                if limit.clock_id is None or limit.clock_id != engine.clock_id:
+                    self._send_time_control(engine, clock, increment)
+                engine.clock_id = limit.clock_id
                 if limit.nodes is not None:
                     if limit.time is not None or limit.white_clock is not None or limit.black_clock is not None or increment is not None:
                         raise EngineError("xboard does not support mixing node limits with time limits")
@@ -2217,8 +2225,6 @@ def start(self, engine: XBoardProtocol) -> None:
 
                     engine.send_line("nps 1")
                     engine.send_line(f"st {max(1, int(limit.nodes))}")
-                if limit.time is not None:
-                    engine.send_line(f"st {max(0.01, limit.time)}")
                 if limit.depth is not None:
                     engine.send_line(f"sd {max(1, int(limit.depth))}")
                 if limit.white_clock is not None:
@@ -2270,6 +2276,13 @@ def line_received(self, engine: XBoardProtocol, line: str) -> None:
                 else:
                     LOGGER.warning("%s: Unexpected engine output: %r", engine, line)
 
+            def _send_time_control(self, engine: XBoardProtocol, clock: Optional[float], increment: Optional[float]) -> None:
+                if limit.remaining_moves or clock is not None or increment is not None:
+                    base_mins, base_secs = divmod(int(clock or 0), 60)
+                    engine.send_line(f"level {limit.remaining_moves or 0} {base_mins}:{base_secs:02d} {increment or 0}")
+                if limit.time is not None:
+                    engine.send_line(f"st {max(0.01, limit.time)}")
+
             def _post(self, engine: XBoardProtocol, line: str) -> None:
                 if not self.result.done():
                     self.play_result.info = _parse_xboard_post(line, engine.board, info)
diff --git a/test.py b/test.py
index 17dec2916..d6d0b3926 100755
--- a/test.py
+++ b/test.py
@@ -3713,7 +3713,9 @@ async def main():
             mock.assert_done()
 
             limit = chess.engine.Limit(black_clock=65, white_clock=100,
-                                       black_inc=4, white_inc=8)
+                                       black_inc=4, white_inc=8,
+                                       clock_id="xboard level")
+            board = chess.Board()
             mock.expect("new")
             mock.expect("force")
             mock.expect("level 0 1:40 8")
@@ -3723,10 +3725,25 @@ async def main():
             mock.expect("easy")
             mock.expect("go", ["move e2e4"])
             mock.expect_ping()
-            result = await protocol.play(chess.Board(), limit)
+            result = await protocol.play(board, limit)
             self.assertEqual(result.move, chess.Move.from_uci("e2e4"))
             mock.assert_done()
 
+            board.push(result.move)
+            board.push_uci("e7e5")
+
+            mock.expect("force")
+            mock.expect("e7e5")
+            mock.expect("time 10000")
+            mock.expect("otim 6500")
+            mock.expect("nopost")
+            mock.expect("easy")
+            mock.expect("go", ["move d2d4"])
+            mock.expect_ping()
+            result = await protocol.play(board, limit)
+            self.assertEqual(result.move, chess.Move.from_uci("d2d4"))
+            mock.assert_done()
+
         asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 

From 13ef9447ae2a6063b06200965f923fc34a872ba5 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 30 Apr 2023 11:59:51 +0200
Subject: [PATCH 417/613] Try Sphinx 7.0.0

---
 docs/requirements.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/requirements.txt b/docs/requirements.txt
index 8f65fe1fd..526215aee 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1 @@
-Sphinx==6.1.2
+Sphinx==7.0.0

From e73121a0caea542bc493ad72b59d7fbc17e02633 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 30 Apr 2023 13:37:13 +0200
Subject: [PATCH 418/613] Revert "Try Sphinx 7.0.0"

This reverts commit 13ef9447ae2a6063b06200965f923fc34a872ba5.
---
 docs/requirements.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/requirements.txt b/docs/requirements.txt
index 526215aee..8f65fe1fd 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1 @@
-Sphinx==7.0.0
+Sphinx==6.1.2

From 29bf03e1b030f761589ace9fe75da5152853f6c4 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 1 May 2023 13:09:36 +0200
Subject: [PATCH 419/613] Add perft with pinned ep capturer and impossible
 check

---
 examples/perft/tricky.perft | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/examples/perft/tricky.perft b/examples/perft/tricky.perft
index 6a572a330..2510a9aea 100644
--- a/examples/perft/tricky.perft
+++ b/examples/perft/tricky.perft
@@ -124,6 +124,12 @@ perft 1 6
 perft 2 121
 perft 3 711
 
+id align-ep-pinned
+epd 1b1k4/8/8/1rPpK3/8/8/8/8 w - d6
+perft 1 5
+perft 2 100
+perft 3 555
+
 id ep-unrelated-check
 epd rnbqk1nr/bb3p1p/1q2r3/2pPp3/3P4/7P/1PP1NpPP/R1BQKBNR w KQkq c6
 perft 1 2

From 736478a1c7cd798cd7a603b92a5ac7dff692349b Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Tue, 2 May 2023 20:58:22 +0200
Subject: [PATCH 420/613] Work around jQuery removed from Sphinx (fixes #1006)

---
 docs/conf.py          | 7 ++++++-
 docs/requirements.txt | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/docs/conf.py b/docs/conf.py
index bde54010b..ede90b63b 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -15,7 +15,12 @@
 }
 
 # Autodoc.
-extensions = ["sphinx.ext.autodoc", "sphinx.ext.viewcode", "sphinx.ext.intersphinx"]
+extensions = [
+    "sphinx.ext.autodoc",
+    "sphinx.ext.viewcode",
+    "sphinx.ext.intersphinx",
+    "sphinxcontrib.jquery"
+]
 autodoc_member_order = "bysource"
 intersphinx_mapping = {
     "python": ("https://docs.python.org/3", None),
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 8f65fe1fd..d99b8c473 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1,2 @@
 Sphinx==6.1.2
+sphinxcontrib-jquery==4.1

From 40e633bab5145945536c45fd178e8dd9a265ae1f Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 3 May 2023 03:04:37 -0700
Subject: [PATCH 421/613] Correct grammar

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 722d2be36..5b921de70 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -336,7 +336,7 @@ class Limit:
     """
     An identifier to use with XBoard engines to signal that the time
     control has changed. When this field changes, Xboard engines are
-    send level or st commands as appropriate. Otherwise, only time
+    sent level or st commands as appropriate. Otherwise, only time
     and otim commands are sent to update the engine's clock.
     """
 

From c3bc113bcc765dd51f998dc2be83b32c1345091f Mon Sep 17 00:00:00 2001
From: johndoknjas 
Date: Sun, 4 Jun 2023 18:39:59 -0700
Subject: [PATCH 422/613] Small cleanups.

---
 chess/engine.py   | 8 ++++----
 chess/pgn.py      | 5 +----
 chess/polyglot.py | 5 +----
 3 files changed, 6 insertions(+), 12 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index c3b863032..65fc8f6c2 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1532,7 +1532,7 @@ def start(self, engine: UciProtocol) -> None:
 
         return await self.communicate(UciConfigureCommand)
 
-    def _opponent_configuration(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> ConfigMapping:
+    def _opponent_configuration(self, *, opponent: Optional[Opponent] = None) -> ConfigMapping:
         if opponent and opponent.name and "UCI_Opponent" in self.options:
             rating = opponent.rating or "none"
             title = opponent.title or "none"
@@ -1542,7 +1542,7 @@ def _opponent_configuration(self, *, opponent: Optional[Opponent] = None, engine
             return {}
 
     async def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engine_rating: Optional[int] = None) -> None:
-        return await self.configure(self._opponent_configuration(opponent=opponent, engine_rating=engine_rating))
+        return await self.configure(self._opponent_configuration(opponent=opponent))
 
     def _position(self, board: chess.Board) -> None:
         # Select UCI_Variant and UCI_Chess960.
@@ -1932,7 +1932,7 @@ def _chain_config(a: ConfigMapping, b: ConfigMapping) -> Iterator[Tuple[str, Con
 class UciOptionMap(MutableMapping[str, T]):
     """Dictionary with case-insensitive keys."""
 
-    def __init__(self, data: Optional[Union[Iterable[Tuple[str, T]]]] = None, **kwargs: T) -> None:
+    def __init__(self, data: Optional[Iterable[Tuple[str, T]]] = None, **kwargs: T) -> None:
         self._store: Dict[str, Tuple[str, T]] = {}
         if data is None:
             data = {}
@@ -1948,7 +1948,7 @@ def __delitem__(self, key: str) -> None:
         del self._store[key.lower()]
 
     def __iter__(self) -> Iterator[str]:
-        return (casedkey for casedkey, mappedvalue in self._store.values())
+        return (casedkey for casedkey, _ in self._store.values())
 
     def __len__(self) -> int:
         return len(self._store)
diff --git a/chess/pgn.py b/chess/pgn.py
index 553b6ece6..1f99f6506 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -942,10 +942,7 @@ def __setitem__(self, key: str, value: str) -> None:
             self._others[key] = value
 
     def __getitem__(self, key: str) -> str:
-        if key in TAG_ROSTER:
-            return self._tag_roster[key]
-        else:
-            return self._others[key]
+        return self._tag_roster[key] if key in TAG_ROSTER else self._others[key]
 
     def __delitem__(self, key: str) -> None:
         if key in TAG_ROSTER:
diff --git a/chess/polyglot.py b/chess/polyglot.py
index c56c5ecfb..39270c129 100644
--- a/chess/polyglot.py
+++ b/chess/polyglot.py
@@ -391,11 +391,8 @@ def __getitem__(self, index: int) -> Entry:
         return Entry(key, raw_move, weight, learn, move)
 
     def __iter__(self) -> Iterator[Entry]:
-        i = 0
-        size = len(self)
-        while i < size:
+        for i in range(len(self)):
             yield self[i]
-            i += 1
 
     def bisect_key_left(self, key: int) -> int:
         lo = 0

From 67aa18e3bb78d245d6762e514c0037f519c7a30f Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 7 Jul 2023 22:49:38 +0200
Subject: [PATCH 423/613] Fix typo in docs: INFO_BASE -> INFO_BASIC

---
 chess/engine.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index c3b863032..22de2b440 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1155,7 +1155,7 @@ async def play(self, board: chess.Board, limit: Limit, *, game: object = None, i
             Will automatically inform the engine if the object is not equal
             to the previous game (e.g., ``ucinewgame``, ``new``).
         :param info: Selects which additional information to retrieve from the
-            engine. ``INFO_NONE``, ``INFO_BASE`` (basic information that is
+            engine. ``INFO_NONE``, ``INFO_BASIC`` (basic information that is
             trivial to obtain), ``INFO_SCORE``, ``INFO_PV``,
             ``INFO_REFUTATION``, ``INFO_CURRLINE``, ``INFO_ALL`` or any
             bitwise combination. Some overhead is associated with parsing
@@ -1197,7 +1197,7 @@ async def analyse(self, board: chess.Board, limit: Limit, *, multipv: Optional[i
             Will automatically inform the engine if the object is not equal
             to the previous game (e.g., ``ucinewgame``, ``new``).
         :param info: Selects which information to retrieve from the
-            engine. ``INFO_NONE``, ``INFO_BASE`` (basic information that is
+            engine. ``INFO_NONE``, ``INFO_BASIC`` (basic information that is
             trivial to obtain), ``INFO_SCORE``, ``INFO_PV``,
             ``INFO_REFUTATION``, ``INFO_CURRLINE``, ``INFO_ALL`` or any
             bitwise combination. Some overhead is associated with parsing
@@ -1230,7 +1230,7 @@ async def analysis(self, board: chess.Board, limit: Optional[Limit] = None, *, m
             Will automatically inform the engine if the object is not equal
             to the previous game (e.g., ``ucinewgame``, ``new``).
         :param info: Selects which information to retrieve from the
-            engine. ``INFO_NONE``, ``INFO_BASE`` (basic information that is
+            engine. ``INFO_NONE``, ``INFO_BASIC`` (basic information that is
             trivial to obtain), ``INFO_SCORE``, ``INFO_PV``,
             ``INFO_REFUTATION``, ``INFO_CURRLINE``, ``INFO_ALL`` or any
             bitwise combination. Some overhead is associated with parsing

From c4611185b060635bf6b4aef30f7daf75e9737b22 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 8 Jul 2023 17:26:00 +0200
Subject: [PATCH 424/613] Add sf16 WDL model

---
 chess/engine.py | 18 +++++++++++++++---
 test.py         |  1 +
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 22de2b440..55c5bc9b0 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -44,7 +44,7 @@
 
 try:
     from typing import Literal
-    _WdlModel = Literal["sf", "sf15.1", "sf15", "sf14", "sf12", "lichess"]
+    _WdlModel = Literal["sf", "sf16", "sf15.1", "sf15", "sf14", "sf12", "lichess"]
 except ImportError:
     # Before Python 3.8.
     _WdlModel = str  # type: ignore
@@ -637,11 +637,20 @@ def __ge__(self, other: object) -> bool:
         else:
             return NotImplemented
 
+def _sf16_wins(cp: int, *, ply: int) -> int:
+    # https://github.com/official-stockfish/Stockfish/blob/sf_16/src/uci.h#L38
+    NormalizeToPawnValue = 328
+    # https://github.com/official-stockfish/Stockfish/blob/sf_16/src/uci.cpp#L200-L224
+    m = min(240, max(ply, 0)) / 64
+    a = (((0.38036525 * m + -2.82015070) * m + 23.17882135) * m) + 307.36768407
+    b = (((-2.29434733 * m + 13.27689788) * m + -14.26828904) * m) + 63.45318330
+    x = min(4000, max(cp * NormalizeToPawnValue / 100, -4000))
+    return int(0.5 + 1000 / (1 + math.exp((a - x) / b)))
 
 def _sf15_1_wins(cp: int, *, ply: int) -> int:
-    # https://github.com/official-stockfish/Stockfish/blob/sf_15.1/src/uci.cpp#L200-L224
     # https://github.com/official-stockfish/Stockfish/blob/sf_15.1/src/uci.h#L38
     NormalizeToPawnValue = 361
+    # https://github.com/official-stockfish/Stockfish/blob/sf_15.1/src/uci.cpp#L200-L224
     m = min(240, max(ply, 0)) / 64
     a = (((-0.58270499 * m + 2.68512549) * m + 15.24638015) * m) + 344.49745382
     b = (((-2.65734562 * m + 15.96509799) * m + -20.69040836) * m) + 73.61029937
@@ -703,9 +712,12 @@ def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> Wdl:
         elif model == "sf15":
             wins = _sf15_wins(self.cp, ply=ply)
             losses = _sf15_wins(-self.cp, ply=ply)
-        else:
+        elif model == "sf15.1":
             wins = _sf15_1_wins(self.cp, ply=ply)
             losses = _sf15_1_wins(-self.cp, ply=ply)
+        else:
+            wins = _sf16_wins(self.cp, ply=ply)
+            losses = _sf16_wins(-self.cp, ply=ply)
         draws = 1000 - wins - losses
         return Wdl(wins, draws, losses)
 
diff --git a/test.py b/test.py
index 17dec2916..50b45cf5c 100755
--- a/test.py
+++ b/test.py
@@ -3002,6 +3002,7 @@ def test_wdl_model(self):
         self.assertEqual(chess.engine.Cp(146).wdl(model="sf14", ply=25), chess.engine.Wdl(601, 398, 1))
         self.assertEqual(chess.engine.Cp(40).wdl(model="sf15", ply=25), chess.engine.Wdl(58, 937, 5))
         self.assertEqual(chess.engine.Cp(100).wdl(model="sf15.1", ply=64), chess.engine.Wdl(497, 503, 0))
+        self.assertEqual(chess.engine.Cp(-52).wdl(model="sf16", ply=63), chess.engine.Wdl(0, 932, 68))
 
     @catchAndSkip(FileNotFoundError, "need stockfish")
     def test_sf_forced_mates(self):

From a1f16f828c9d101abb8c7789ee418b06c74d919f Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sat, 8 Jul 2023 17:03:38 -0700
Subject: [PATCH 425/613] Correct documentation of send_game_result method

---
 chess/engine.py | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index ae33db688..2b0285aca 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1251,10 +1251,15 @@ async def send_game_result(self, board: chess.Board, winner: Optional[Color] = N
         """
         Sends the engine the result of the game.
 
-        UCI engines only recieve the final position of the board. XBoard engines
-        receive the final moves and a line of the form "result  {}",
-        where  is one of "1-0", "0-1", "1/2-1/2", or "*" to indicate white
-        won, black won, draw, or adjournment, respectively.
+        XBoard engines receive the final moves and a line of the form
+        "result  {}". The  field is one of "1-0",
+        "0-1", "1/2-1/2", or "*" to indicate white won, black won, draw,
+        or adjournment, respectively. The  field is a description
+        of the specific reason for the end of the game: "White mates",
+        "Time forfeiture", "Stalemate", etc.
+
+        UCI engines do not expect end-of-game information and so are not
+        sent anything.
 
         :param board: The final state of the board.
         :param winner: Optional. Specify the winner of the game. This is useful

From 65bf3d09bd0707ac257305f4151eace2cf8db8f0 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sat, 8 Jul 2023 18:44:33 -0700
Subject: [PATCH 426/613] Error on dubious characters in ending messages

Curly braces and newlines can allow arbitrary messages to be sent
to an engine. Do not allow these characters to be sent in
end-of-game messages.

Add tests to make sure an exception is raised for invalid characters.
---
 chess/engine.py |  3 +++
 test.py         | 16 ++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/chess/engine.py b/chess/engine.py
index 2b0285aca..41b12033e 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2508,6 +2508,9 @@ async def send_opponent_information(self, *, opponent: Optional[Opponent] = None
     async def send_game_result(self, board: chess.Board, winner: Optional[Color] = None, game_ending: Optional[str] = None, game_complete: bool = True) -> None:
         class XBoardGameResultCommand(BaseCommand[XBoardProtocol, None]):
             def start(self, engine: XBoardProtocol) -> None:
+                if game_ending and any(c in game_ending for c in "{}\n\r"):
+                    raise EngineError(f"invalid line break or curly braces in game ending message: {game_ending!r}")
+
                 engine._new(board, engine.game, {})  # Send final moves to engine.
                 
                 outcome = board.outcome(claim_draw=True)
diff --git a/test.py b/test.py
index fd3b93ed8..4c1bd15c9 100755
--- a/test.py
+++ b/test.py
@@ -3752,6 +3752,22 @@ async def main():
             await protocol.send_game_result(timeout_board, chess.BLACK, "Time forfeiture")
             mock.assert_done()
 
+            error_board = chess.Board()
+            mock.expect("new")
+            mock.expect("force")
+            mock.expect("st 5")
+            mock.expect("nopost")
+            mock.expect("easy")
+            mock.expect("go", ["move e2e4"])
+            mock.expect_ping()
+            result = await protocol.play(error_board, limit, game="error")
+            self.assertEqual(result.move, error_board.parse_uci("e2e4"))
+            error_board.push(result.move)
+            for c in "\n\r{}":
+                with self.assertRaises(chess.engine.EngineError):
+                    await protocol.send_game_result(error_board, chess.BLACK, f"Time{c}forfeiture")
+            mock.assert_done()
+
             material_board = chess.Board("k7/8/8/8/8/8/8/K7 b - - 0 1")
             self.assertTrue(material_board.is_insufficient_material())
             mock.expect("new")

From ee11a56c96c2105a50111eef9a8a7eb1e5e5e29a Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 13 Jul 2023 01:25:12 -0700
Subject: [PATCH 427/613] Error when XBoard opponent has newline in name

Use the configuration machinery to send the opponent's information
to the engine instead of using the Opponent class directly. This will
make sure that an exception is raised if the opponent's name has
newlines in it before send_line() is called. This prevents opponents
from injecting commands into the engine. For example, if an
opponent sets their name as "Cheat\neasy", then the following
commands will be sent to the local engine

name Cheat
easy

which would cause the engine to turn off pondering.

Also, add tests to show the change works as expected.
---
 chess/engine.py | 14 ++++++++------
 test.py         |  9 +++++++++
 2 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 4c24681ee..efcc0f134 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2152,6 +2152,7 @@ def _variant(self, variant: Optional[str]) -> None:
 
     def _new(self, board: chess.Board, game: object, options: ConfigMapping, opponent: Optional[Opponent] = None) -> None:
         self._configure(options)
+        self._configure(self._opponent_configuration(opponent=opponent))
 
         # Set up starting position.
         root = board.root()
@@ -2172,15 +2173,16 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping, opponen
             if self.config.get("random"):
                 self.send_line("random")
             
-            opponent_name = (opponent.name if opponent else None) or self.target_config.get("name")
+            opponent_name = self.config.get("name")
             if opponent_name and self.features.get("name", True):
                 self.send_line(f"name {opponent_name}")
 
-            opponent_rating = (opponent.rating if opponent else None) or self.target_config.get("opponent_rating") or 0
-            if self.target_config.get("engine_rating") or opponent_rating:
-                self.send_line(f"rating {self.target_config.get('engine_rating') or 0} {opponent_rating}")
+            opponent_rating = self.config.get("opponent_rating")
+            engine_rating = self.config.get("engine_rating")
+            if engine_rating or opponent_rating:
+                self.send_line(f"rating {engine_rating or 0} {opponent_rating or 0}")
 
-            if (opponent and opponent.is_engine) or (self.target_config.get("computer") if self.config.get("computer") is None else self.config.get("computer")):
+            if self.config.get("computer"):
                 self.send_line("computer")
 
         self.send_line("force")
@@ -2518,7 +2520,7 @@ def _opponent_configuration(self, *, opponent: Optional[Opponent] = None, engine
         if opponent is None:
             return {}
 
-        opponent_info: Dict[str, Union[int, bool, str]] = {"engine_rating": engine_rating or 0,
+        opponent_info: Dict[str, Union[int, bool, str]] = {"engine_rating": engine_rating or self.target_config.get("engine_rating") or 0,
                                                            "opponent_rating": opponent.rating or 0,
                                                            "computer": opponent.is_engine or False}
         
diff --git a/test.py b/test.py
index 8cd599474..b109fabf8 100755
--- a/test.py
+++ b/test.py
@@ -3688,6 +3688,15 @@ async def main():
             self.assertEqual(result.move, board.parse_san("e5"))
             mock.assert_done()
 
+            bad_opponent = chess.engine.Opponent("New\nLine", "GM", 1, False)
+            with self.assertRaises(chess.engine.EngineError):
+                await protocol.send_opponent_information(opponent=bad_opponent)
+            mock.assert_done()
+
+            with self.assertRaises(chess.engine.EngineError):
+                result = await protocol.play(board, limit, game="bad game", opponent=bad_opponent)
+            mock.assert_done()
+
         asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 

From 0dae9d773f18ab10086896969c5842c7caa78f9c Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sat, 15 Jul 2023 05:56:56 -0700
Subject: [PATCH 428/613] Add send_opponent_information() documentation

---
 chess/engine.py | 10 +++++++++-
 docs/engine.rst |  6 ++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index efcc0f134..d60179635 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -449,10 +449,18 @@ class Info(enum.IntFlag):
 @dataclasses.dataclass
 class Opponent:
     """Used to store information about an engine's opponent."""
+
     name: Optional[str]
+    """The name of the opponent."""
+
     title: Optional[str]
+    """The opponent's title--for example, GM, IM, or BOT."""
+
     rating: Optional[int]
+    """The opponent's ELO rating."""
+
     is_engine: Optional[bool]
+    """Whether the opponent is a chess engine/computer program."""
 
 
 class PovScore:
@@ -1158,7 +1166,7 @@ async def send_opponent_information(self, *, opponent: Optional[Opponent] = None
         method should be called before the first move of a game--i.e., the
         first call to :func:`chess.engine.Protocol.play()`.
 
-        :param opponent: Optional. The opponent's information.
+        :param opponent: Optional. An instance of :class:`chess.engine.Opponent` that has the opponent's information.
         :param engine_rating: Optional. This engine's own rating. Only used by XBoard engines.
         """
 
diff --git a/docs/engine.rst b/docs/engine.rst
index 08f8f8f5e..556d64793 100644
--- a/docs/engine.rst
+++ b/docs/engine.rst
@@ -70,6 +70,12 @@ Example: Let Stockfish play against itself, 100 milliseconds per move.
 .. autoclass:: chess.engine.PlayResult
     :members:
 
+.. autoclass:: chess.engine.Protocol
+    :members: send_opponent_information
+
+.. autoclass:: chess.engine.Opponent
+    :members:
+
 Analysing and evaluating a position
 -----------------------------------
 

From 0fcee3568956feaba9f96cb1a906b4a68c83c9ab Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sat, 15 Jul 2023 05:58:49 -0700
Subject: [PATCH 429/613] Add send_game_result() documentation

Also, correct formatting and spelling.
---
 chess/engine.py | 11 ++++++-----
 docs/engine.rst |  3 +++
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index d60179635..30618d829 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1280,9 +1280,9 @@ async def send_game_result(self, board: chess.Board, winner: Optional[Color] = N
         Sends the engine the result of the game.
 
         XBoard engines receive the final moves and a line of the form
-        "result  {}". The  field is one of "1-0",
-        "0-1", "1/2-1/2", or "*" to indicate white won, black won, draw,
-        or adjournment, respectively. The  field is a description
+        ``result  {}``. The ```` field is one of ``1-0``,
+        ``0-1``, ``1/2-1/2``, or ``*`` to indicate white won, black won, draw,
+        or adjournment, respectively. The ```` field is a description
         of the specific reason for the end of the game: "White mates",
         "Time forfeiture", "Stalemate", etc.
 
@@ -1292,9 +1292,10 @@ async def send_game_result(self, board: chess.Board, winner: Optional[Color] = N
         :param board: The final state of the board.
         :param winner: Optional. Specify the winner of the game. This is useful
             if the result of the game is not evident from the board--e.g., time
-            forfeiture or draw by agreement.
+            forfeiture or draw by agreement. If not ``None``, this parameter
+            overrides any winner derivable from the board.
         :param game_ending: Optional. Text describing the reason for the game
-            ending. Similarly to the winner paramter, this overrides any game
+            ending. Similarly to the winner parameter, this overrides any game
             result derivable from the board.
         :param game_complete: Optional. Whether the game reached completion.
         """
diff --git a/docs/engine.rst b/docs/engine.rst
index 556d64793..02dd4548f 100644
--- a/docs/engine.rst
+++ b/docs/engine.rst
@@ -76,6 +76,9 @@ Example: Let Stockfish play against itself, 100 milliseconds per move.
 .. autoclass:: chess.engine.Opponent
     :members:
 
+.. autoclass:: chess.engine.Protocol
+    :members: send_game_result
+
 Analysing and evaluating a position
 -----------------------------------
 

From 53e92b445b9340368b1791843e24a8975fb602d5 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Tue, 25 Jul 2023 21:16:14 +0200
Subject: [PATCH 430/613] Document potentially surprising time complexities
 (closes #1000)

---
 chess/pgn.py | 50 +++++++++++++++++++++++++++++++++++++++++++++-----
 docs/pgn.rst |  4 ++++
 2 files changed, 49 insertions(+), 5 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 1f99f6506..f6783585c 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -215,6 +215,8 @@ def board(self) -> chess.Board:
         ``Variant``) unless the ``FEN`` header tag is set.
 
         It's a copy, so modifying the board will not alter the game.
+
+        Complexity is `O(n)`.
         """
 
     @abc.abstractmethod
@@ -226,11 +228,15 @@ def ply(self) -> int:
 
         Usually this is equal to the number of parent nodes, but it may be
         more if the game was started from a custom position.
+
+        Complexity is `O(n)`.
         """
 
     def turn(self) -> Color:
         """
         Gets the color to move at this node. See :data:`chess.Board.turn`.
+
+        Complexity is `O(n)`.
         """
         return self.ply() % 2 == 0
 
@@ -241,13 +247,21 @@ def root(self) -> GameNode:
         return node
 
     def game(self) -> Game:
-        """Gets the root node, i.e., the game."""
+        """
+        Gets the root node, i.e., the game.
+
+        Complexity is `O(n)`.
+        """
         root = self.root()
         assert isinstance(root, Game), "GameNode not rooted in Game"
         return root
 
     def end(self) -> GameNode:
-        """Follows the main variation to the end and returns the last node."""
+        """
+        Follows the main variation to the end and returns the last node.
+
+        Complexity is `O(n)`.
+        """
         node = self
 
         while node.variations:
@@ -256,7 +270,11 @@ def end(self) -> GameNode:
         return node
 
     def is_end(self) -> bool:
-        """Checks if this node is the last node in the current variation."""
+        """
+        Checks if this node is the last node in the current variation.
+
+        Complexity is `O(1)`.
+        """
         return not self.variations
 
     def starts_variation(self) -> bool:
@@ -267,6 +285,8 @@ def starts_variation(self) -> bool:
 
         For example, in ``1. e4 e5 (1... c5 2. Nf3) 2. Nf3``, the node holding
         1... c5 starts a variation.
+
+        Complexity is `O(1)`.
         """
         if not self.parent or not self.parent.variations:
             return False
@@ -274,7 +294,11 @@ def starts_variation(self) -> bool:
         return self.parent.variations[0] != self
 
     def is_mainline(self) -> bool:
-        """Checks if the node is in the mainline of the game."""
+        """
+        Checks if the node is in the mainline of the game.
+
+        Complexity is `O(n)`.
+        """
         node = self
 
         while node.parent:
@@ -291,6 +315,8 @@ def is_main_variation(self) -> bool:
         """
         Checks if this node is the first variation from the point of view of its
         parent. The root node is also in the main variation.
+
+        Complexity is `O(1)`.
         """
         if not self.parent:
             return True
@@ -367,6 +393,8 @@ def next(self) -> Optional[ChildNode]:
         """
         Returns the first node of the mainline after this node, or ``None`` if
         this node does not have any children.
+
+        Complexity is `O(1)`.
         """
         return self.variations[0] if self.variations else None
 
@@ -404,6 +432,8 @@ def eval(self) -> Optional[chess.engine.PovScore]:
         """
         Parses the first valid ``[%eval ...]`` annotation in the comment of
         this node, if any.
+
+        Complexity is `O(n)`.
         """
         match = EVAL_REGEX.search(self.comment)
         if not match:
@@ -428,6 +458,8 @@ def eval_depth(self) -> Optional[int]:
         """
         Parses the first valid ``[%eval ...]`` annotation in the comment of
         this node and returns the corresponding depth, if any.
+
+        Complexity is `O(1)`.
         """
         match = EVAL_REGEX.search(self.comment)
         return int(match.group("depth")) if match and match.group("depth") else None
@@ -670,6 +702,8 @@ def san(self) -> str:
         See :func:`chess.Board.san()`.
 
         Do not call this on the root node.
+
+        Complexity is `O(n)`.
         """
         return self.parent.board().san(self.move)
 
@@ -679,11 +713,17 @@ def uci(self, *, chess960: Optional[bool] = None) -> str:
         See :func:`chess.Board.uci()`.
 
         Do not call this on the root node.
+
+        Complexity is `O(n)`.
         """
         return self.parent.board().uci(self.move, chess960=chess960)
 
     def end(self) -> ChildNode:
-        """Follows the main variation to the end and returns the last node."""
+        """
+        Follows the main variation to the end and returns the last node.
+
+        Complexity is `O(n)`.
+        """
         return typing.cast(ChildNode, super().end())
 
     def _accept_node(self, parent_board: chess.Board, visitor: BaseVisitor[ResultT]) -> None:
diff --git a/docs/pgn.rst b/docs/pgn.rst
index 9ebe96594..dd5a6fa47 100644
--- a/docs/pgn.rst
+++ b/docs/pgn.rst
@@ -48,6 +48,10 @@ position of the game. The tree consists of one root node
 nodes (:class:`~chess.pgn.ChildNode`).
 Both extend :class:`~chess.pgn.GameNode`.
 
+.. note:: Some basic methods have complexity `O(n)` for a game with n moves.
+  When following a variation, it is often more efficient to use visitors
+  or incrementally update state (like board, ply counter, or turn).
+
 .. autoclass:: chess.pgn.GameNode
     :members:
 

From 59a5233da0f601e18df04a3b4532d54fd252e8e9 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Tue, 25 Jul 2023 21:22:54 +0200
Subject: [PATCH 431/613] Update Stockfish 11 download URLs (fixes #1019)

---
 .github/workflows/setup-ubuntu-latest.sh  | 2 +-
 .github/workflows/setup-windows-latest.sh | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/setup-ubuntu-latest.sh b/.github/workflows/setup-ubuntu-latest.sh
index de1d567fd..8954c8f0c 100755
--- a/.github/workflows/setup-ubuntu-latest.sh
+++ b/.github/workflows/setup-ubuntu-latest.sh
@@ -1,7 +1,7 @@
 #!/bin/sh -e
 
 # Stockfish
-wget https://stockfish.s3.amazonaws.com/stockfish-11-linux.zip
+wget https://files.stockfishchess.org/archive/Stockfish%2011/stockfish-11-linux.zip
 unzip stockfish-11-linux.zip
 mkdir -p bin
 cp stockfish-11-linux/Linux/stockfish_20011801_x64_bmi2 bin/stockfish
diff --git a/.github/workflows/setup-windows-latest.sh b/.github/workflows/setup-windows-latest.sh
index 3ae917a5c..685ead65a 100755
--- a/.github/workflows/setup-windows-latest.sh
+++ b/.github/workflows/setup-windows-latest.sh
@@ -2,7 +2,7 @@
 
 echo Download ...
 choco install wget
-wget https://stockfishchess.org/files/stockfish-11-win.zip
+wget https://files.stockfishchess.org/archive/Stockfish%2011/stockfish-11-win.zip
 
 echo Unzip ..
 7z e stockfish-11-win.zip stockfish-11-win/Windows/*.exe

From 34de67dfd285e36f152a6e4eca0ce9f32ab82328 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Tue, 25 Jul 2023 22:29:10 +0200
Subject: [PATCH 432/613] Prepare changelog for next release

---
 CHANGELOG.rst | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 2580c841c..0e5872ed4 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,38 @@
 Changelog for python-chess
 ==========================
 
+Upcoming in the next release
+----------------------------
+
+New features:
+
+* Use ``chess.engine.Opponent`` to send opponent information to engines.
+* Inform engines about the game result using
+  ``chess.engine.Protocol.send_game_result()``.
+* Add ``chess.engine.Limit.clock_id``.
+* Add ``chess.svg.board(..., borders=True)``.
+* Avoid rendering background behind SVG boards to better support transparency.
+* Add ``chess.pgn.BaseVisitor.begin_parse_san()``.
+* Introduce new distance metrics ``chess.square_manhattan_distance()`` and
+  ``chess.square_knight_distance()``.
+
+Bugfixes:
+
+* Fix ``chess.pgn.GameNode.eval()`` sometimes off by one centipawn.
+* Fix handling of additional spaces between UCI option tokens.
+* Handle implicit XBoard engine resignation via output like
+  ``0-1 {White resigns}``.
+
+Changes:
+
+* Add model ``sf16`` for ``chess.engine.Score.wdl()``, the new default.
+* Update ``lichess`` WDL model.
+* Keep PGN headers that do not belong to the Seven Tag Roster in insertion
+  order.
+* Halve the number of open file descriptors maintained by tablebases
+  and opening books.
+* Reduce verbosity of logged ``chess.pgn`` errors.
+
 New in v1.9.4 (22nd Dec 2022)
 -----------------------------
 

From 41b27bb099169c6b36590e1bc9b690a2de8f9a2a Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 18:30:59 +0200
Subject: [PATCH 433/613] Bump 1.10.0

---
 CHANGELOG.rst     | 4 ++--
 chess/__init__.py | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 0e5872ed4..a44b2b070 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,8 +1,8 @@
 Changelog for python-chess
 ==========================
 
-Upcoming in the next release
-----------------------------
+New in v1.10.0 (27th Jul 2023)
+------------------------------
 
 New features:
 
diff --git a/chess/__init__.py b/chess/__init__.py
index 980dc34b4..6c0cf9c94 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -27,7 +27,7 @@
 
 __email__ = "niklas.fiekas@backscattering.de"
 
-__version__ = "1.9.4"
+__version__ = "1.10.0"
 
 import collections
 import copy

From cfda9c0f70697e6c17f71ffa1d1381c5067dae62 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 18:32:48 +0200
Subject: [PATCH 434/613] Test Python 3.11 using tox

---
 tox.ini | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tox.ini b/tox.ini
index 3eeb764ba..1b103fd6c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py37,py38,py39,py310
+envlist = py37,py38,py39,py310,py311
 
 [testenv]
 passenv = LD_LIBRARY_PATH

From 23e43177cc979660907814540e210ce0ea45c43b Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 19:29:50 +0200
Subject: [PATCH 435/613] Make flake8 happy

---
 chess/__init__.py | 2 +-
 chess/engine.py   | 8 ++++----
 chess/variant.py  | 1 -
 3 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 6c0cf9c94..b87e3cbec 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -240,7 +240,7 @@ def square_knight_distance(a: Square, b: Square) -> int:
     elif dx == dy == 2:
         return 4
     elif dx == dy == 1:
-        if BB_SQUARES[a] & BB_CORNERS or BB_SQUARES[b] & BB_CORNERS: # Special case only for corner squares
+        if BB_SQUARES[a] & BB_CORNERS or BB_SQUARES[b] & BB_CORNERS:  # Special case only for corner squares
             return 4
 
     m = math.ceil(max(dx / 2, dy / 2, (dx + dy) / 3))
diff --git a/chess/engine.py b/chess/engine.py
index 30618d829..cab9d5d2c 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2181,7 +2181,7 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping, opponen
 
             if self.config.get("random"):
                 self.send_line("random")
-            
+
             opponent_name = self.config.get("name")
             if opponent_name and self.features.get("name", True):
                 self.send_line(f"name {opponent_name}")
@@ -2532,7 +2532,7 @@ def _opponent_configuration(self, *, opponent: Optional[Opponent] = None, engine
         opponent_info: Dict[str, Union[int, bool, str]] = {"engine_rating": engine_rating or self.target_config.get("engine_rating") or 0,
                                                            "opponent_rating": opponent.rating or 0,
                                                            "computer": opponent.is_engine or False}
-        
+
         if opponent.name and self.features.get("name", True):
             opponent_info["name"] = f"{opponent.title or ''} {opponent.name}".strip()
 
@@ -2548,7 +2548,7 @@ def start(self, engine: XBoardProtocol) -> None:
                     raise EngineError(f"invalid line break or curly braces in game ending message: {game_ending!r}")
 
                 engine._new(board, engine.game, {})  # Send final moves to engine.
-                
+
                 outcome = board.outcome(claim_draw=True)
 
                 if not game_complete:
@@ -2966,7 +2966,7 @@ def send_opponent_information(self, *, opponent: Optional[Opponent] = None, engi
                 self.timeout)
             future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)
         return future.result()
-        
+
     def ping(self) -> None:
         with self._not_shut_down():
             coro = asyncio.wait_for(self.protocol.ping(), self.timeout)
diff --git a/chess/variant.py b/chess/variant.py
index cd1670480..31cdea287 100644
--- a/chess/variant.py
+++ b/chess/variant.py
@@ -17,7 +17,6 @@
 from __future__ import annotations
 
 import chess
-import copy
 import itertools
 
 from typing import Dict, Generic, Hashable, Iterable, Iterator, List, Optional, Type, TypeVar, Union

From 8ede90039228a78e0d74c3b07fb3cbaacea752f6 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 19:34:26 +0200
Subject: [PATCH 436/613] PyPI has removed GPG signatures

---
 release.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/release.py b/release.py
index 099dd4a98..d27ddf04e 100755
--- a/release.py
+++ b/release.py
@@ -99,7 +99,7 @@ def pypi():
     system("rm -rf build")
     system("python3 setup.py sdist bdist_wheel")
     system("twine check dist/*")
-    system("twine upload --skip-existing --sign dist/*")
+    system("twine upload --skip-existing")
 
 
 def github_release(tagname):

From 1cca86ff8fcf6ee587d9a138fd774d1b762ed0e6 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 19:39:46 +0200
Subject: [PATCH 437/613] Remove redundant license headers

---
 chess/__init__.py | 16 ----------------
 chess/engine.py   | 16 ----------------
 chess/gaviota.py  | 17 -----------------
 chess/pgn.py      | 16 ----------------
 chess/polyglot.py | 16 ----------------
 chess/svg.py      | 20 --------------------
 chess/syzygy.py   | 16 ----------------
 chess/variant.py  | 16 ----------------
 setup.py          | 16 ----------------
 test.py           | 16 ----------------
 10 files changed, 165 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index b87e3cbec..a41f38501 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -1,19 +1,3 @@
-# This file is part of the python-chess library.
-# Copyright (C) 2012-2021 Niklas Fiekas 
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see .
-
 """
 A chess library with move generation and validation,
 Polyglot opening book probing, PGN reading and writing,
diff --git a/chess/engine.py b/chess/engine.py
index cab9d5d2c..37b7715fd 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1,19 +1,3 @@
-# This file is part of the python-chess library.
-# Copyright (C) 2012-2021 Niklas Fiekas 
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see .
-
 from __future__ import annotations
 
 import abc
diff --git a/chess/gaviota.py b/chess/gaviota.py
index 454949795..c2439728f 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -1,20 +1,3 @@
-# This file is part of the python-chess library.
-# Copyright (C) 2015 Jean-Noël Avila 
-# Copyright (C) 2015-2021 Niklas Fiekas 
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see .
-
 from __future__ import annotations
 
 import ctypes
diff --git a/chess/pgn.py b/chess/pgn.py
index f6783585c..edeab84a3 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -1,19 +1,3 @@
-# This file is part of the python-chess library.
-# Copyright (C) 2012-2021 Niklas Fiekas 
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see .
-
 from __future__ import annotations
 
 import abc
diff --git a/chess/polyglot.py b/chess/polyglot.py
index 39270c129..7d9e425ea 100644
--- a/chess/polyglot.py
+++ b/chess/polyglot.py
@@ -1,19 +1,3 @@
-# This file is part of the python-chess library.
-# Copyright (C) 2012-2021 Niklas Fiekas 
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see .
-
 from __future__ import annotations
 
 import chess
diff --git a/chess/svg.py b/chess/svg.py
index 94ae21569..3e034ce30 100644
--- a/chess/svg.py
+++ b/chess/svg.py
@@ -1,23 +1,3 @@
-# This file is part of the python-chess library.
-# Copyright (C) 2016-2021 Niklas Fiekas 
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see .
-
-# Piece vector graphics are copyright (C) Colin M.L. Burnett
-#  and also licensed under the
-# GNU General Public License.
-
 from __future__ import annotations
 
 import math
diff --git a/chess/syzygy.py b/chess/syzygy.py
index 2d835b200..fd9d80890 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -1,19 +1,3 @@
-# This file is part of the python-chess library.
-# Copyright (C) 2012-2021 Niklas Fiekas 
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see .
-
 from __future__ import annotations
 
 import collections
diff --git a/chess/variant.py b/chess/variant.py
index 31cdea287..e81d0aa72 100644
--- a/chess/variant.py
+++ b/chess/variant.py
@@ -1,19 +1,3 @@
-# This file is part of the python-chess library.
-# Copyright (C) 2016-2021 Niklas Fiekas 
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see .
-
 from __future__ import annotations
 
 import chess
diff --git a/setup.py b/setup.py
index bc6a8af51..09675868e 100755
--- a/setup.py
+++ b/setup.py
@@ -1,21 +1,5 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
-#
-# This file is part of the python-chess library.
-# Copyright (C) 2012-2021 Niklas Fiekas 
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see .
 
 import os
 import platform
diff --git a/test.py b/test.py
index b109fabf8..d25dd75ad 100755
--- a/test.py
+++ b/test.py
@@ -1,20 +1,4 @@
 #!/usr/bin/env python3
-#
-# This file is part of the python-chess library.
-# Copyright (C) 2012-2021 Niklas Fiekas 
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see .
 
 import asyncio
 import copy

From ff1a974408abf6da882b633a19e9a340fd21b3e2 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 19:42:27 +0200
Subject: [PATCH 438/613] Test WDL consistency under all models

---
 test.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/test.py b/test.py
index d25dd75ad..6419eb89f 100755
--- a/test.py
+++ b/test.py
@@ -2948,9 +2948,10 @@ def test_score_ordering(self):
                 self.assertEqual(i >= j, a >= b)
                 self.assertEqual(i < j, a.score(mate_score=100000) < b.score(mate_score=100000))
 
-                self.assertTrue(not (i < j) or a.wdl().expectation() <= b.wdl().expectation())
-                self.assertTrue(not (i < j) or a.wdl().winning_chance() <= b.wdl().winning_chance())
-                self.assertTrue(not (i < j) or a.wdl().losing_chance() >= b.wdl().losing_chance())
+                for model in ["sf12", "sf14", "sf15", "sf15.1", "sf16"]:
+                    self.assertTrue(not (i < j) or a.wdl(model=model).expectation() <= b.wdl(model=model).expectation())
+                    self.assertTrue(not (i < j) or a.wdl(model=model).winning_chance() <= b.wdl(model=model).winning_chance())
+                    self.assertTrue(not (i < j) or a.wdl(model=model).losing_chance() >= b.wdl(model=model).losing_chance())
 
     def test_score(self):
         # Negation.

From 9ba8b68d789a6fb7f96c3640cbc7c1c3667cb119 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 19:51:35 +0200
Subject: [PATCH 439/613] Drop support for Python 3.7 (#463)

---
 .github/workflows/test.yml | 2 +-
 chess/polyglot.py          | 4 ++--
 chess/syzygy.py            | 2 +-
 setup.py                   | 3 +--
 tox.ini                    | 4 ++--
 5 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 95e9a3728..e06db4221 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,7 +7,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3
diff --git a/chess/polyglot.py b/chess/polyglot.py
index 7d9e425ea..92704e6a4 100644
--- a/chess/polyglot.py
+++ b/chess/polyglot.py
@@ -333,8 +333,8 @@ def __init__(self, filename: PathLike) -> None:
             raise IOError(f"invalid file size: ensure {filename!r} is a valid polyglot opening book")
 
         try:
-            # Python 3.8
-            self.mmap.madvise(mmap.MADV_RANDOM)  # type: ignore
+            # Linux
+            self.mmap.madvise(mmap.MADV_RANDOM)
         except AttributeError:
             pass
 
diff --git a/chess/syzygy.py b/chess/syzygy.py
index fd9d80890..af375b5da 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -596,7 +596,7 @@ def init_mmap(self) -> None:
                 raise IOError(f"invalid file size: ensure {self.path!r} is a valid syzygy tablebase file")
 
             try:
-                # Python 3.8
+                # Linux
                 data.madvise(mmap.MADV_RANDOM)
             except AttributeError:
                 pass
diff --git a/setup.py b/setup.py
index 09675868e..ed3d8b0bf 100755
--- a/setup.py
+++ b/setup.py
@@ -65,7 +65,7 @@ def read_description():
     package_data={
         "chess": ["py.typed"],
     },
-    python_requires=">=3.7",
+    python_requires=">=3.8",
     classifiers=[
         "Development Status :: 5 - Production/Stable",
         "Intended Audience :: Developers",
@@ -73,7 +73,6 @@ def read_description():
         "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
         "Operating System :: OS Independent",
         "Programming Language :: Python :: 3 :: Only",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
diff --git a/tox.ini b/tox.ini
index 1b103fd6c..665e9f38b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py37,py38,py39,py310,py311
+envlist = py38,py39,py310,py311
 
 [testenv]
 passenv = LD_LIBRARY_PATH
@@ -10,7 +10,7 @@ commands =
     python test.py --verbose
     python -m doctest README.rst --verbose
 
-[testenv:{py37,py38,py39}]
+[testenv:{py38,py39}]
 passenv = LD_LIBRARY_PATH
 whitelist_externals =
     stockfish

From 85816125b4936ebfd0fd90a2cbddda747c7eeafd Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 19:52:02 +0200
Subject: [PATCH 440/613] Try mypy also under Python 3.10

---
 .github/workflows/test.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e06db4221..184092752 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -39,7 +39,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: ["3.9", "3.11"]
+        python-version: ["3.9", "3.10", "3.11"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3

From 8b9e1481568e35802c733140ef2303361976e764 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 20:05:07 +0200
Subject: [PATCH 441/613] fixup! Drop support for Python 3.7 (#463)

---
 chess/polyglot.py | 5 ++++-
 chess/syzygy.py   | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/chess/polyglot.py b/chess/polyglot.py
index 92704e6a4..ac339902c 100644
--- a/chess/polyglot.py
+++ b/chess/polyglot.py
@@ -312,6 +312,9 @@ def size(self) -> int:
     def close(self) -> None:
         pass
 
+    def madvise(self, option: int, start: int = ..., length: int = ...) -> None:
+        pass
+
 
 def _randint(rng: Optional[random.Random], a: int, b: int) -> int:
     return random.randint(a, b) if rng is None else rng.randint(a, b)
@@ -333,7 +336,7 @@ def __init__(self, filename: PathLike) -> None:
             raise IOError(f"invalid file size: ensure {filename!r} is a valid polyglot opening book")
 
         try:
-            # Linux
+            # Unix
             self.mmap.madvise(mmap.MADV_RANDOM)
         except AttributeError:
             pass
diff --git a/chess/syzygy.py b/chess/syzygy.py
index af375b5da..96a17e921 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -596,7 +596,7 @@ def init_mmap(self) -> None:
                 raise IOError(f"invalid file size: ensure {self.path!r} is a valid syzygy tablebase file")
 
             try:
-                # Linux
+                # Unix
                 data.madvise(mmap.MADV_RANDOM)
             except AttributeError:
                 pass

From 6fbb309554e7aaaa450432972a66a1879fcbfe86 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 20:05:31 +0200
Subject: [PATCH 442/613] Unconditionally use typing.Literal

---
 chess/__init__.py | 15 +++++----------
 chess/engine.py   | 19 +++++++------------
 chess/pgn.py      | 13 +++----------
 chess/variant.py  |  4 ++--
 4 files changed, 17 insertions(+), 34 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index a41f38501..0604cec54 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -22,14 +22,9 @@
 import itertools
 import typing
 
-from typing import ClassVar, Callable, Counter, Dict, Generic, Hashable, Iterable, Iterator, List, Mapping, Optional, SupportsInt, Tuple, Type, TypeVar, Union
+from typing import ClassVar, Callable, Counter, Dict, Generic, Hashable, Iterable, Iterator, List, Literal, Mapping, Optional, SupportsInt, Tuple, Type, TypeVar, Union
 
-try:
-    from typing import Literal
-    _EnPassantSpec = Literal["legal", "fen", "xfen"]
-except ImportError:
-    # Before Python 3.8.
-    _EnPassantSpec = str  # type: ignore
+EnPassantSpec = Literal["legal", "fen", "xfen"]
 
 
 Color = bool
@@ -2394,7 +2389,7 @@ def has_legal_en_passant(self) -> bool:
         """Checks if there is a legal en passant capture."""
         return self.ep_square is not None and any(self.generate_legal_ep())
 
-    def fen(self, *, shredder: bool = False, en_passant: _EnPassantSpec = "legal", promoted: Optional[bool] = None) -> str:
+    def fen(self, *, shredder: bool = False, en_passant: EnPassantSpec = "legal", promoted: Optional[bool] = None) -> str:
         """
         Gets a FEN representation of the position.
 
@@ -2426,7 +2421,7 @@ def fen(self, *, shredder: bool = False, en_passant: _EnPassantSpec = "legal", p
             str(self.fullmove_number)
         ])
 
-    def shredder_fen(self, *, en_passant: _EnPassantSpec = "legal", promoted: Optional[bool] = None) -> str:
+    def shredder_fen(self, *, en_passant: EnPassantSpec = "legal", promoted: Optional[bool] = None) -> str:
         return " ".join([
             self.epd(shredder=True, en_passant=en_passant, promoted=promoted),
             str(self.halfmove_clock),
@@ -2662,7 +2657,7 @@ def _epd_operations(self, operations: Mapping[str, Union[None, str, int, float,
 
         return "".join(epd)
 
-    def epd(self, *, shredder: bool = False, en_passant: _EnPassantSpec = "legal", promoted: Optional[bool] = None, **operations: Union[None, str, int, float, Move, Iterable[Move]]) -> str:
+    def epd(self, *, shredder: bool = False, en_passant: EnPassantSpec = "legal", promoted: Optional[bool] = None, **operations: Union[None, str, int, float, Move, Iterable[Move]]) -> str:
         """
         Gets an EPD representation of the current position.
 
diff --git a/chess/engine.py b/chess/engine.py
index 37b7715fd..144fbb649 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -24,14 +24,9 @@
 
 from chess import Color
 from types import TracebackType
-from typing import Any, Callable, Coroutine, Deque, Dict, Generator, Generic, Iterable, Iterator, List, Mapping, MutableMapping, Optional, Tuple, Type, TypeVar, Union
+from typing import Any, Callable, Coroutine, Deque, Dict, Generator, Generic, Iterable, Iterator, List, Literal, Mapping, MutableMapping, Optional, Tuple, Type, TypeVar, Union
 
-try:
-    from typing import Literal
-    _WdlModel = Literal["sf", "sf16", "sf15.1", "sf15", "sf14", "sf12", "lichess"]
-except ImportError:
-    # Before Python 3.8.
-    _WdlModel = str  # type: ignore
+WdlModel = Literal["sf", "sf16", "sf15.1", "sf15", "sf14", "sf12", "lichess"]
 
 
 T = TypeVar("T")
@@ -476,7 +471,7 @@ def is_mate(self) -> bool:
         """Tests if this is a mate score."""
         return self.relative.is_mate()
 
-    def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> PovWdl:
+    def wdl(self, *, model: WdlModel = "sf", ply: int = 30) -> PovWdl:
         """See :func:`~chess.engine.Score.wdl()`."""
         return PovWdl(self.relative.wdl(model=model, ply=ply), self.turn)
 
@@ -553,7 +548,7 @@ def is_mate(self) -> bool:
         return self.mate() is not None
 
     @abc.abstractmethod
-    def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> Wdl:
+    def wdl(self, *, model: WdlModel = "sf", ply: int = 30) -> Wdl:
         """
         Returns statistics for the expected outcome of this game, based on
         a *model*, given that this score is reached at *ply*.
@@ -699,7 +694,7 @@ def mate(self) -> None:
     def score(self, *, mate_score: Optional[int] = None) -> int:
         return self.cp
 
-    def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> Wdl:
+    def wdl(self, *, model: WdlModel = "sf", ply: int = 30) -> Wdl:
         if model == "lichess":
             wins = _lichess_raw_wins(max(-1000, min(self.cp, 1000)))
             losses = 1000 - wins
@@ -758,7 +753,7 @@ def score(self, *, mate_score: Optional[int] = None) -> Optional[int]:
         else:
             return -mate_score - self.moves
 
-    def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> Wdl:
+    def wdl(self, *, model: WdlModel = "sf", ply: int = 30) -> Wdl:
         if model == "lichess":
             cp = (21 - min(10, abs(self.moves))) * 100
             wins = _lichess_raw_wins(cp)
@@ -795,7 +790,7 @@ def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: ...
     def score(self, *, mate_score: Optional[int] = None) -> Optional[int]:
         return mate_score
 
-    def wdl(self, *, model: _WdlModel = "sf", ply: int = 30) -> Wdl:
+    def wdl(self, *, model: WdlModel = "sf", ply: int = 30) -> Wdl:
         return Wdl(1000, 0, 0)
 
     def __neg__(self) -> Mate:
diff --git a/chess/pgn.py b/chess/pgn.py
index edeab84a3..ae22afaf6 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -11,16 +11,9 @@
 import chess.engine
 import chess.svg
 
-from typing import Any, Callable, Dict, Generic, Iterable, Iterator, List, Mapping, MutableMapping, Set, TextIO, Tuple, Type, TypeVar, Optional, Union
+from typing import Any, Callable, Dict, Generic, Iterable, Iterator, List, Literal, Mapping, MutableMapping, Set, TextIO, Tuple, Type, TypeVar, Optional, Union
 from chess import Color, Square
 
-try:
-    from typing import Literal
-    _TrueLiteral = Literal[True]
-except ImportError:
-    # Before Python 3.8.
-    _TrueLiteral = bool  # type: ignore
-
 
 LOGGER = logging.getLogger(__name__)
 
@@ -1289,7 +1282,7 @@ def result(self) -> chess.Board:
         return self.board
 
 
-class SkipVisitor(BaseVisitor[_TrueLiteral]):
+class SkipVisitor(BaseVisitor[Literal[True]]):
     """Skips a game."""
 
     def begin_game(self) -> SkipType:
@@ -1301,7 +1294,7 @@ def end_headers(self) -> SkipType:
     def begin_variation(self) -> SkipType:
         return SKIP
 
-    def result(self) -> _TrueLiteral:
+    def result(self) -> Literal[True]:
         return True
 
 
diff --git a/chess/variant.py b/chess/variant.py
index e81d0aa72..6160696a2 100644
--- a/chess/variant.py
+++ b/chess/variant.py
@@ -762,7 +762,7 @@ def set_fen(self, fen: str) -> None:
         self.remaining_checks[chess.WHITE] = wc
         self.remaining_checks[chess.BLACK] = bc
 
-    def epd(self, shredder: bool = False, en_passant: chess._EnPassantSpec = "legal", promoted: Optional[bool] = None, **operations: Union[None, str, int, float, chess.Move, Iterable[chess.Move]]) -> str:
+    def epd(self, shredder: bool = False, en_passant: chess.EnPassantSpec = "legal", promoted: Optional[bool] = None, **operations: Union[None, str, int, float, chess.Move, Iterable[chess.Move]]) -> str:
         epd = [super().epd(shredder=shredder, en_passant=en_passant, promoted=promoted),
                "{:d}+{:d}".format(max(self.remaining_checks[chess.WHITE], 0),
                                   max(self.remaining_checks[chess.BLACK], 0))]
@@ -1019,7 +1019,7 @@ def board_fen(self, promoted: Optional[bool] = None) -> str:
             promoted = True
         return super().board_fen(promoted=promoted)
 
-    def epd(self, shredder: bool = False, en_passant: chess._EnPassantSpec = "legal", promoted: Optional[bool] = None, **operations: Union[None, str, int, float, chess.Move, Iterable[chess.Move]]) -> str:
+    def epd(self, shredder: bool = False, en_passant: chess.EnPassantSpec = "legal", promoted: Optional[bool] = None, **operations: Union[None, str, int, float, chess.Move, Iterable[chess.Move]]) -> str:
         epd = super().epd(shredder=shredder, en_passant=en_passant, promoted=promoted)
         board_part, info_part = epd.split(" ", 1)
         return f"{board_part}[{str(self.pockets[chess.WHITE]).upper()}{self.pockets[chess.BLACK]}] {info_part}"

From 6dcc975d7ca599a8288c1b9435e1a161221aea49 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 20:06:55 +0200
Subject: [PATCH 443/613] Unconditionally use TypedDict

---
 chess/engine.py | 62 +++++++++++++++++++++++--------------------------
 1 file changed, 29 insertions(+), 33 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 144fbb649..75ee9de58 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -328,41 +328,37 @@ def __repr__(self) -> str:
                       if getattr(self, attr) is not None))
 
 
-try:
-    class InfoDict(typing.TypedDict, total=False):
-        """
-        Dictionary of aggregated information sent by the engine.
+class InfoDict(typing.TypedDict, total=False):
+    """
+    Dictionary of aggregated information sent by the engine.
 
-        Commonly used keys are: ``score`` (a :class:`~chess.engine.PovScore`),
-        ``pv`` (a list of :class:`~chess.Move` objects), ``depth``,
-        ``seldepth``, ``time`` (in seconds), ``nodes``, ``nps``, ``multipv``
-        (``1`` for the mainline).
+    Commonly used keys are: ``score`` (a :class:`~chess.engine.PovScore`),
+    ``pv`` (a list of :class:`~chess.Move` objects), ``depth``,
+    ``seldepth``, ``time`` (in seconds), ``nodes``, ``nps``, ``multipv``
+    (``1`` for the mainline).
 
-        Others: ``tbhits``, ``currmove``, ``currmovenumber``, ``hashfull``,
-        ``cpuload``, ``refutation``, ``currline``, ``ebf`` (effective branching factor),
-        ``wdl`` (a :class:`~chess.engine.PovWdl`), and ``string``.
-        """
-        score: PovScore
-        pv: List[chess.Move]
-        depth: int
-        seldepth: int
-        time: float
-        nodes: int
-        nps: int
-        tbhits: int
-        multipv: int
-        currmove: chess.Move
-        currmovenumber: int
-        hashfull: int
-        cpuload: int
-        refutation: Dict[chess.Move, List[chess.Move]]
-        currline: Dict[int, List[chess.Move]]
-        ebf: float
-        wdl: PovWdl
-        string: str
-except AttributeError:
-    # Before Python 3.8.
-    InfoDict = dict  # type: ignore
+    Others: ``tbhits``, ``currmove``, ``currmovenumber``, ``hashfull``,
+    ``cpuload``, ``refutation``, ``currline``, ``ebf`` (effective branching factor),
+    ``wdl`` (a :class:`~chess.engine.PovWdl`), and ``string``.
+    """
+    score: PovScore
+    pv: List[chess.Move]
+    depth: int
+    seldepth: int
+    time: float
+    nodes: int
+    nps: int
+    tbhits: int
+    multipv: int
+    currmove: chess.Move
+    currmovenumber: int
+    hashfull: int
+    cpuload: int
+    refutation: Dict[chess.Move, List[chess.Move]]
+    currline: Dict[int, List[chess.Move]]
+    ebf: float
+    wdl: PovWdl
+    string: str
 
 
 class PlayResult:

From 8214d9757da593c71ad13a1bcb933393125d5937 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 20:23:14 +0200
Subject: [PATCH 444/613] Remove PollingChildWatcher

---
 chess/engine.py | 45 +++++----------------------------------------
 1 file changed, 5 insertions(+), 40 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 75ee9de58..6fac0c602 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -108,46 +108,11 @@ def _init_watcher(self) -> asyncio.AbstractChildWatcher:
             pass
 
         if threading.current_thread() is threading.main_thread():
-            try:
-                watcher = asyncio.ThreadedChildWatcher()
-                LOGGER.debug("Using ThreadedChildWatcher")
-                return watcher
-            except AttributeError:
-                # Before Python 3.8.
-                LOGGER.debug("Using SafeChildWatcher")
-                return asyncio.SafeChildWatcher()
-
-        class PollingChildWatcher(asyncio.SafeChildWatcher):
-            _loop: Optional[asyncio.AbstractEventLoop]
-            _callbacks: Dict[int, Any]
-
-            def __init__(self) -> None:
-                super().__init__()
-                self._poll_handle: Optional[asyncio.Handle] = None
-                self._poll_delay = 0.001
-
-            def attach_loop(self, loop: Optional[asyncio.AbstractEventLoop]) -> None:
-                assert loop is None or isinstance(loop, asyncio.AbstractEventLoop)
-
-                if self._loop is not None and loop is None and self._callbacks:
-                    warnings.warn("A loop is being detached from a child watcher with pending handlers", RuntimeWarning)
-
-                if self._poll_handle is not None:
-                    self._poll_handle.cancel()
-
-                self._loop = loop
-                if self._loop is not None:
-                    self._poll_handle = self._loop.call_soon(self._poll)
-                    self._do_waitpid_all()  # type: ignore
-
-            def _poll(self) -> None:
-                if self._loop:
-                    self._do_waitpid_all()  # type: ignore
-                    self._poll_delay = min(self._poll_delay * 2, 1.0)
-                    self._poll_handle = self._loop.call_later(self._poll_delay, self._poll)
-
-        LOGGER.debug("Using PollingChildWatcher")
-        return PollingChildWatcher()
+            LOGGER.debug("Using SafeChildWatcher")
+            return asyncio.SafeChildWatcher()
+        else:
+            LOGGER.debug("Using ThreadedChildWatcher")
+            return asyncio.ThreadedChildWatcher()
 
 
 def run_in_background(coroutine: Callable[[concurrent.futures.Future[T]], Coroutine[Any, Any, None]], *, name: Optional[str] = None, debug: bool = False, _policy_lock: threading.Lock = threading.Lock()) -> T:

From 7acc7cf603dee1e129957a68b1584e7cc9a9536a Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 20:33:46 +0200
Subject: [PATCH 445/613] Stop using chess.engine.EventLoopPolicy

---
 chess/engine.py                       | 80 +--------------------------
 docs/engine.rst                       |  6 --
 examples/bratko_kopec/bratko_kopec.py |  1 -
 fuzz/engine.py                        |  1 -
 test.py                               | 17 ------
 5 files changed, 2 insertions(+), 103 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 6fac0c602..6958479f9 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -42,77 +42,8 @@
 MANAGED_OPTIONS = ["uci_chess960", "uci_variant", "multipv", "ponder"]
 
 
-class EventLoopPolicy(asyncio.AbstractEventLoopPolicy):
-    """
-    An event loop policy for thread-local event loops and child watchers.
-    Ensures each event loop is capable of spawning and watching subprocesses,
-    even when not running on the main thread.
-
-    Windows: Uses :class:`~asyncio.ProactorEventLoop`.
-
-    Unix: Uses :class:`~asyncio.SelectorEventLoop`. If available,
-    :class:`~asyncio.PidfdChildWatcher` is used to detect subprocess
-    termination (Python 3.9+ on Linux 5.3+). Otherwise, the default child
-    watcher is used on the main thread and relatively slow eager polling
-    is used on all other threads.
-    """
-    class _Local(threading.local):
-        loop: Optional[asyncio.AbstractEventLoop] = None
-        set_called = False
-        watcher: Optional[asyncio.AbstractChildWatcher] = None
-
-    def __init__(self) -> None:
-        self._local = self._Local()
-
-    def get_event_loop(self) -> asyncio.AbstractEventLoop:
-        if self._local.loop is None and not self._local.set_called and threading.current_thread() is threading.main_thread():
-            self.set_event_loop(self.new_event_loop())
-        if self._local.loop is None:
-            raise RuntimeError(f"no current event loop in thread {threading.current_thread().name!r}")
-        return self._local.loop
-
-    def set_event_loop(self, loop: Optional[asyncio.AbstractEventLoop]) -> None:
-        assert loop is None or isinstance(loop, asyncio.AbstractEventLoop)
-        self._local.set_called = True
-        self._local.loop = loop
-        if self._local.watcher is not None:
-            self._local.watcher.attach_loop(loop)
-
-    def new_event_loop(self) -> asyncio.AbstractEventLoop:
-        return asyncio.ProactorEventLoop() if sys.platform == "win32" else asyncio.SelectorEventLoop()  # type: ignore
-
-    def get_child_watcher(self) -> asyncio.AbstractChildWatcher:
-        if self._local.watcher is None:
-            self._local.watcher = self._init_watcher()
-            self._local.watcher.attach_loop(self._local.loop)
-        return self._local.watcher
-
-    def set_child_watcher(self, watcher: Optional[asyncio.AbstractChildWatcher]) -> None:
-        assert watcher is None or isinstance(watcher, asyncio.AbstractChildWatcher)
-        if self._local.watcher is not None:
-            self._local.watcher.close()
-        self._local.watcher = watcher
-
-    def _init_watcher(self) -> asyncio.AbstractChildWatcher:
-        if sys.platform == "win32":
-            raise NotImplementedError
-
-        try:
-            os.close(os.pidfd_open(os.getpid()))
-            watcher: asyncio.AbstractChildWatcher = asyncio.PidfdChildWatcher()
-            LOGGER.debug("Using PidfdChildWatcher")
-            return watcher
-        except (AttributeError, OSError):
-            # Before Python 3.9 or before Linux 5.3 or the syscall is not
-            # permitted.
-            pass
-
-        if threading.current_thread() is threading.main_thread():
-            LOGGER.debug("Using SafeChildWatcher")
-            return asyncio.SafeChildWatcher()
-        else:
-            LOGGER.debug("Using ThreadedChildWatcher")
-            return asyncio.ThreadedChildWatcher()
+# No longer needed, but alias kept around for compatibility.
+EventLoopPolicy = asyncio.DefaultEventLoopPolicy
 
 
 def run_in_background(coroutine: Callable[[concurrent.futures.Future[T]], Coroutine[Any, Any, None]], *, name: Optional[str] = None, debug: bool = False, _policy_lock: threading.Lock = threading.Lock()) -> T:
@@ -122,16 +53,9 @@ def run_in_background(coroutine: Callable[[concurrent.futures.Future[T]], Corout
     Blocks on *future* and returns the result as soon as it is resolved.
     The coroutine and all remaining tasks continue running in the background
     until complete.
-
-    Note: This installs a :class:`chess.engine.EventLoopPolicy` for the entire
-    process.
     """
     assert asyncio.iscoroutinefunction(coroutine)
 
-    with _policy_lock:
-        if not isinstance(asyncio.get_event_loop_policy(), EventLoopPolicy):
-            asyncio.set_event_loop_policy(EventLoopPolicy())
-
     future: concurrent.futures.Future[T] = concurrent.futures.Future()
 
     def background() -> None:
diff --git a/docs/engine.rst b/docs/engine.rst
index 02dd4548f..a326430e0 100644
--- a/docs/engine.rst
+++ b/docs/engine.rst
@@ -58,7 +58,6 @@ Example: Let Stockfish play against itself, 100 milliseconds per move.
 
         await engine.quit()
 
-    asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
     asyncio.run(main())
 
 .. autoclass:: chess.engine.Protocol
@@ -126,7 +125,6 @@ Example:
 
         await engine.quit()
 
-    asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
     asyncio.run(main())
 
 .. autoclass:: chess.engine.Protocol
@@ -189,7 +187,6 @@ Example: Stream information from the engine and stop on an arbitrary condition.
 
         await engine.quit()
 
-    asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
     asyncio.run(main())
 
 .. autoclass:: chess.engine.Protocol
@@ -243,7 +240,6 @@ Options
 
         # [...]
 
-    asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
     asyncio.run(main())
 
 .. autoclass:: chess.engine.Protocol
@@ -315,5 +311,3 @@ Reference
 
 .. autoclass:: chess.engine.SimpleAnalysisResult
     :members:
-
-.. autofunction:: chess.engine.EventLoopPolicy
diff --git a/examples/bratko_kopec/bratko_kopec.py b/examples/bratko_kopec/bratko_kopec.py
index 62e3655a6..2553f4399 100755
--- a/examples/bratko_kopec/bratko_kopec.py
+++ b/examples/bratko_kopec/bratko_kopec.py
@@ -152,5 +152,4 @@ async def main() -> None:
 
 
 if __name__ == "__main__":
-    asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
     asyncio.run(main())
diff --git a/fuzz/engine.py b/fuzz/engine.py
index a08d08bf3..ad0cb9fe9 100644
--- a/fuzz/engine.py
+++ b/fuzz/engine.py
@@ -7,7 +7,6 @@
 
 
 logging.getLogger("chess.engine").setLevel(logging.CRITICAL)
-asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
 
 
 @PythonFuzz
diff --git a/test.py b/test.py
index 6419eb89f..73b96f71c 100755
--- a/test.py
+++ b/test.py
@@ -3114,7 +3114,6 @@ async def main():
             await protocol.ping()
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_uci_debug(self):
@@ -3130,7 +3129,6 @@ async def main():
             protocol.debug(False)
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_uci_go(self):
@@ -3173,7 +3171,6 @@ async def main():
             self.assertEqual(result.ponder, None)
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_iota_log(self):
@@ -3196,7 +3193,6 @@ async def main():
                 await protocol.play(board, chess.engine.Limit(time=5.0))
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_uci_analyse_mode(self):
@@ -3243,7 +3239,6 @@ async def main():
             self.assertEqual(best.ponder, chess.Move.from_uci("e7e5"))
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_uci_play_after_analyse(self):
@@ -3271,7 +3266,6 @@ async def main():
 
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_uci_ponderhit(self):
@@ -3387,7 +3381,6 @@ async def main():
 
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_uci_info(self):
@@ -3474,7 +3467,6 @@ async def main():
             await protocol.send_game_result(checkmate_board)
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_hiarcs_bestmove(self):
@@ -3499,7 +3491,6 @@ async def main():
             self.assertEqual(result.info["string"], "keep double  space")
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_xboard_options(self):
@@ -3562,7 +3553,6 @@ async def main():
             await protocol.configure({"buttonvar": None})
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_xboard_replay(self):
@@ -3624,7 +3614,6 @@ async def main():
             self.assertEqual(result.move, board.parse_san("d4"))
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_xboard_opponent(self):
@@ -3682,7 +3671,6 @@ async def main():
                 result = await protocol.play(board, limit, game="bad game", opponent=bad_opponent)
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_xboard_result(self):
@@ -3772,7 +3760,6 @@ async def main():
             await protocol.send_game_result(material_board)
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_xboard_analyse(self):
@@ -3810,7 +3797,6 @@ async def main():
             self.assertEqual(info["pv"], [chess.Move.from_uci(move) for move in ["f7f6", "e2e4", "e7e6"]])
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_xboard_level(self):
@@ -3855,7 +3841,6 @@ async def main():
             self.assertEqual(result.move, chess.Move.from_uci("d2d4"))
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     def test_xboard_error(self):
@@ -3874,7 +3859,6 @@ async def main():
 
             mock.assert_done()
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     @catchAndSkip(FileNotFoundError, "need /bin/bash")
@@ -3886,7 +3870,6 @@ async def main():
             self.assertNotEqual(results[0], None)
             self.assertNotEqual(results[1], None)
 
-        asyncio.set_event_loop_policy(chess.engine.EventLoopPolicy())
         asyncio.run(main())
 
     @catchAndSkip(FileNotFoundError, "need /bin/bash")

From 61a660f5d94b5be60f5d488f04145cecdb27cf29 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 20:43:43 +0200
Subject: [PATCH 446/613] Rename acknowledgements section

---
 README.rst | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/README.rst b/README.rst
index cbacf299e..d8089b146 100644
--- a/README.rst
+++ b/README.rst
@@ -352,8 +352,8 @@ If you like, share interesting things you are using python-chess for, for exampl
 * an accessible chessboard that allows blind and visually impaired  players  to play chess against Stockfish – https://github.com/blindpandas/chessmart
 
 
-Acknowledgements
-----------------
+Prior art
+---------
 
 Thanks to the Stockfish authors and thanks to Sam Tannous for publishing his
 approach to `avoid rotated bitboards with direct lookup (PDF) `_
@@ -371,4 +371,4 @@ License
 -------
 
 python-chess is licensed under the GPL 3 (or any later version at your option).
-Check out LICENSE.txt for the full text.
+Check out `LICENSE.txt` for the full text.

From 773888594fe44c35b5d070a9b6b04464c07958ef Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 20:47:27 +0200
Subject: [PATCH 447/613] Fix outdated WDL model docs

---
 chess/engine.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 6958479f9..4e18a3cf7 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -453,7 +453,8 @@ def wdl(self, *, model: WdlModel = "sf", ply: int = 30) -> Wdl:
 
         :param model:
             * ``sf``, the WDL model used by the latest Stockfish
-              (currently ``sf15.1``).
+              (currently ``sf16``).
+            * ``sf16``, the WDL model used by Stockfish 16.
             * ``sf15.1``, the WDL model used by Stockfish 15.1.
             * ``sf15``, the WDL model used by Stockfish 15.
             * ``sf14``, the WDL model used by Stockfish 14.

From dc026b9b5a931faa6f47e79cb7da5c61a19bb53b Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 20:57:31 +0200
Subject: [PATCH 448/613] Bump copyright year in docs

---
 docs/conf.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/conf.py b/docs/conf.py
index ede90b63b..22f960575 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -34,7 +34,7 @@
 
 # General information about the project.
 project = "python-chess"
-copyright = "2014–2022, Niklas Fiekas"
+copyright = "2014–2023, Niklas Fiekas"
 
 # The version.
 version = chess.__version__

From 179b6f3032008a500f5c12ab760a7f4037b2b142 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 21:02:50 +0200
Subject: [PATCH 449/613] Remove experimental interactive PGN viewer (closes
 #753)

---
 chess/_interactive.py | 190 ------------------------------------------
 chess/pgn.py          |   5 --
 2 files changed, 195 deletions(-)
 delete mode 100644 chess/_interactive.py

diff --git a/chess/_interactive.py b/chess/_interactive.py
deleted file mode 100644
index edeef3df0..000000000
--- a/chess/_interactive.py
+++ /dev/null
@@ -1,190 +0,0 @@
-# TODO: Fix typing in this file.
-# mypy: ignore-errors
-
-import chess.svg
-
-
-class WidgetError(Exception):
-    """
-    raised when ipywidgets is not installed
-    """
-
-
-class NotJupyter(Exception):
-    """
-    raised when InteractiveViewer is instantiated from a non jupyter shell
-    """
-
-
-try:
-    from ipywidgets import Button, GridBox, Layout, HTML, Output, HBox, Select
-    from IPython.display import display, clear_output
-except ModuleNotFoundError:
-    raise WidgetError("You need to have ipywidgets installed and running from Jupyter")
-
-
-class InteractiveViewer:
-    def __new__(cls, game):
-        jupyter = True
-        try:
-            if get_ipython().__class__.__name__ != "ZMQInteractiveShell":
-                jupyter = False
-        except NameError:
-            jupyter = False
-
-        if not jupyter:
-            raise NotJupyter("The interactive viewer only runs in Jupyter shell")
-
-        return object.__new__(cls)
-
-    def __init__(self, game):
-        self.game = game
-        self.__board = game.board()
-        self.__moves = list(game.mainline_moves())
-        self.__white_moves = [str(move) for (i, move) in enumerate(self.__moves) if i % 2 == 0]
-        self.__black_moves = [str(move) for (i, move) in enumerate(self.__moves) if i % 2 == 1]
-        self.__move_list_len = len(self.__white_moves)
-        self.__num_moves = len(self.__moves)
-        self.__next_move = 0 if self.__moves else None
-        self.__out = Output()
-
-    def __next_click(self, _):
-        move = self.__moves[self.__next_move]
-        self.__next_move += 1
-        self.__board.push(move)
-        self.show()
-
-    def __prev_click(self, _):
-        self.__board.pop()
-        self.__next_move -= 1
-        self.show()
-
-    def __reset_click(self, _):
-        self.__board.reset()
-        self.__next_move = 0
-        self.show()
-
-    def __white_select_change(self, change):
-        new = change["new"]
-        if (isinstance(new, dict)) and ("index" in new):
-            target = new["index"] * 2
-            self.__seek(target)
-            self.show()
-
-    def __black_select_change(self, change):
-        new = change["new"]
-        if (isinstance(new, dict)) and ("index" in new):
-            target = new["index"] * 2 + 1
-            self.__seek(target)
-            self.show()
-
-    def __seek(self, target):
-        while self.__next_move <= target:
-            move = self.__moves[self.__next_move]
-            self.__next_move += 1
-            self.__board.push(move)
-
-        while self.__next_move > target + 1:
-            self.__board.pop()
-            self.__next_move -= 1
-
-    def show(self):
-        display(self.__out)
-        next_move = Button(
-            icon="step-forward",
-            layout=Layout(width="60px", grid_area="right"),
-            disabled=self.__next_move >= self.__num_moves,
-        )
-
-        prev_move = Button(
-            icon="step-backward",
-            layout=Layout(width="60px", grid_area="left"),
-            disabled=self.__next_move == 0,
-        )
-
-        reset = Button(
-            icon="stop",
-            layout=Layout(width="60px", grid_area="middle"),
-            disabled=self.__next_move == 0,
-        )
-
-        if self.__next_move == 0:
-            white_move = None
-            black_move = None
-        else:
-            white_move = (
-                self.__white_moves[self.__next_move // 2]
-                if (self.__next_move % 2) == 1
-                else None
-            )
-            black_move = (
-                self.__black_moves[self.__next_move // 2 - 1]
-                if (self.__next_move % 2) == 0
-                else None
-            )
-
-        white_move_list = Select(
-            options=self.__white_moves,
-            value=white_move,
-            rows=max(self.__move_list_len, 24),
-            disabled=False,
-            layout=Layout(width="80px"),
-        )
-
-        black_move_list = Select(
-            options=self.__black_moves,
-            value=black_move,
-            rows=max(self.__move_list_len, 24),
-            disabled=False,
-            layout=Layout(width="80px"),
-        )
-
-        white_move_list.observe(self.__white_select_change)
-        black_move_list.observe(self.__black_select_change)
-
-        move_number_width = 3 + len(str(self.__move_list_len)) * 10
-
-        move_number = Select(
-            options=range(1, self.__move_list_len + 1),
-            value=None,
-            disabled=True,
-            rows=max(self.__move_list_len, 24),
-            layout=Layout(width=f"{move_number_width}px"),
-        )
-
-        move_list = HBox(
-            [move_number, white_move_list, black_move_list],
-            layout=Layout(height="407px", grid_area="moves"),
-        )
-
-        next_move.on_click(self.__next_click)
-        prev_move.on_click(self.__prev_click)
-        reset.on_click(self.__reset_click)
-
-        with self.__out:
-            grid_box = GridBox(
-                children=[next_move, prev_move, reset, self.svg, move_list],
-                layout=Layout(
-                    width=f"{390+move_number_width+160}px",
-                    grid_template_rows="90% 10%",
-                    grid_template_areas="""
-                                "top top top top top moves"
-                                ". left middle right . moves"
-                                """,
-                ),
-            )
-            clear_output(wait=True)
-            display(grid_box)
-
-    @property
-    def svg(self) -> HTML:
-        svg = chess.svg.board(
-            board=self.__board,
-            size=390,
-            lastmove=self.__board.peek() if self.__board.move_stack else None,
-            check=self.__board.king(self.__board.turn)
-            if self.__board.is_check()
-            else None,
-        )
-        svg_widget = HTML(value=svg, layout=Layout(grid_area="top"))
-        return svg_widget
diff --git a/chess/pgn.py b/chess/pgn.py
index ae22afaf6..9ff218ead 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -804,11 +804,6 @@ def __init__(self, headers: Optional[Union[Mapping[str, str], Iterable[Tuple[str
     def board(self) -> chess.Board:
         return self.headers.board()
 
-    # TODO: Consider naming.
-    def _interactive_viewer(self) -> Any:
-        from chess._interactive import InteractiveViewer
-        return InteractiveViewer(self)  # type: ignore
-
     def ply(self) -> int:
         # Optimization: Parse FEN only for custom starting positions.
         return self.board().ply() if "FEN" in self.headers else 0

From bab76653b11e447f7431106025ddd4ebaefc407e Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 21:30:46 +0200
Subject: [PATCH 450/613] Let setup.py show better error on Python 3.7

---
 setup.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/setup.py b/setup.py
index ed3d8b0bf..8c397e456 100755
--- a/setup.py
+++ b/setup.py
@@ -18,8 +18,13 @@
         end of 2018. Consider upgrading to Python 3.
         """))
 
-if sys.version_info < (3, 7):
-    raise ImportError("Since version 1.0.0, python-chess requires Python 3.7 or later.")
+if sys.version_info < (3, 8):
+    raise ImportError(textwrap.dedent("""\
+        You are trying to install python-chess.
+
+        Since version 1.11.0, python-chess requires Python 3.8 or later.
+        Since version 1.0.0, python-chess requires Python 3.7 or later.
+        """))
 
 import chess
 

From 86da00e86f458537bc1a0a6929149a9d2730dd9a Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 27 Jul 2023 21:32:46 +0200
Subject: [PATCH 451/613] Fix rst syntax

---
 README.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.rst b/README.rst
index d8089b146..8ab138666 100644
--- a/README.rst
+++ b/README.rst
@@ -371,4 +371,4 @@ License
 -------
 
 python-chess is licensed under the GPL 3 (or any later version at your option).
-Check out `LICENSE.txt` for the full text.
+Check out ``LICENSE.txt`` for the full text.

From 60d38d5abea8ef1dc2a4787bd8a8981741324a78 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 30 Jul 2023 18:51:45 +0200
Subject: [PATCH 452/613] Start changelog for next release

---
 CHANGELOG.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index a44b2b070..0fa76effa 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,15 @@
 Changelog for python-chess
 ==========================
 
+Upcoming in the next release
+----------------------------
+
+Changes:
+
+* Dropped support for Python 3.7, which had reached its end of life.
+* `chess.engine.EventLoopPolicy` is no longer needed and now merely an alias
+  for the default event loop policy.
+
 New in v1.10.0 (27th Jul 2023)
 ------------------------------
 

From 7857668ed939d346200ac624bcb7e6cecbebf19e Mon Sep 17 00:00:00 2001
From: mauricesvp 
Date: Wed, 2 Aug 2023 16:00:19 +0200
Subject: [PATCH 453/613] Add PGN TimeControl Header Parser

---
 chess/pgn.py                            | 100 ++++++++++++++++++++++++
 data/pgn/nepomniachtchi-liren-game1.pgn |  22 ++++++
 test.py                                 |  47 +++++++++++
 3 files changed, 169 insertions(+)
 create mode 100644 data/pgn/nepomniachtchi-liren-game1.pgn

diff --git a/chess/pgn.py b/chess/pgn.py
index 9ff218ead..72c613dd4 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import abc
+import dataclasses
 import enum
 import itertools
 import logging
@@ -141,6 +142,39 @@ class SkipType(enum.Enum):
 ResultT = TypeVar("ResultT", covariant=True)
 
 
+class TimeControlType(enum.Enum):
+    UNKNOW = 0
+    UNLIMITED = 1
+    STANDARD = 2
+    RAPID = 3
+    BLITZ = 4
+    BULLET = 5
+
+
+@dataclasses.dataclass
+class TimeControlPart:
+    moves: int = 0
+    time: int = 0
+    increment: float = 0
+    delay: float = 0
+
+
+@dataclasses.dataclass
+class TimeControl:
+    """
+    PGN TimeControl Parser
+    Spec: http://www.saremba.de/chessgml/standards/pgn/pgn-complete.htm#c9.6
+
+    Not Yet Implemented:
+    - Hourglass/Sandclock ('*' prefix)
+    - Differentiating between Bronstein and Simple Delay (Not part of the PGN Spec)
+      - More Info: https://en.wikipedia.org/wiki/Chess_clock#Timing_methods
+    """
+
+    parts: list[TimeControlPart] = dataclasses.field(default_factory=list)
+    type: TimeControlType = TimeControlType.UNKNOW
+
+
 class _AcceptFrame:
     def __init__(self, node: ChildNode, *, is_variation: bool = False, sidelines: bool = True):
         self.state = "pre"
@@ -859,6 +893,14 @@ def accept(self, visitor: BaseVisitor[ResultT]) -> ResultT:
         visitor.end_game()
         return visitor.result()
 
+    def time_control(self) -> TimeControl:
+        """
+        Returns the time control of the game. If the game has no time control
+        information, the default time control ('UNKNOWN') is returned.
+        """
+        time_control_header = self.headers.get("TimeControl", "")
+        return parse_time_control(time_control_header)
+
     @classmethod
     def from_board(cls: Type[GameT], board: chess.Board) -> GameT:
         """Creates a game from the move stack of a :class:`~chess.Board()`."""
@@ -1763,3 +1805,61 @@ def skip_game(handle: TextIO) -> bool:
     Skips a game. Returns ``True`` if a game was found and skipped.
     """
     return bool(read_game(handle, Visitor=SkipVisitor))
+
+
+def parse_time_control(time_control: str) -> TimeControl:
+    tc = TimeControl()
+
+    if not time_control:
+        return tc
+
+    if time_control.startswith("?"):
+        return tc
+
+    if time_control.startswith("-"):
+        tc.type = TimeControlType.UNLIMITED
+        return tc
+
+    def _parse_part(part: str) -> TimeControlPart:
+        tcp = TimeControlPart()
+
+        moves_time, *bonus = part.split("+")
+
+        if bonus:
+            bonus = bonus[0]
+            if bonus.lower().endswith("d"):
+                tcp.delay = float(bonus[:-1])
+            else:
+                tcp.increment = float(bonus)
+
+        moves, *time = moves_time.split("/")
+        if time:
+            tcp.moves = int(moves)
+            tcp.time = int(time[0])
+        else:
+            tcp.moves = 0
+            tcp.time = int(moves)
+
+        return tcp
+
+    tc.parts = [_parse_part(part) for part in time_control.split(":")]
+
+    if len(tc.parts) > 1:
+        for part in tc.parts[:-1]:
+            if part.moves == 0:
+                raise ValueError("Only last part can be 'sudden death'.")
+
+    # Classification according to https://www.fide.com/FIDE/handbook/LawsOfChess.pdf
+    # (Bullet added)
+    base_time = tc.parts[0].time
+    increment = tc.parts[0].increment
+    if (base_time + 60 * increment) < 3 * 60:
+        tc.type = TimeControlType.BULLET
+    elif (base_time + 60 * increment) < 15 * 60:
+        tc.type = TimeControlType.BLITZ
+    elif (base_time + 60 * increment) < 60 * 60:
+        tc.type = TimeControlType.RAPID
+    else:
+        tc.type = TimeControlType.STANDARD
+
+    return tc
diff --git a/data/pgn/nepomniachtchi-liren-game1.pgn b/data/pgn/nepomniachtchi-liren-game1.pgn
new file mode 100644
index 000000000..ea3234154
--- /dev/null
+++ b/data/pgn/nepomniachtchi-liren-game1.pgn
@@ -0,0 +1,22 @@
+[Event "FIDE World Championship 2023"]
+[Site "Astana KAZ"]
+[Date "2023.04.09"]
+[Round "1"]
+[White "Nepomniachtchi, Ian"]
+[Black "Liren, Ding"]
+[Result "1/2-1/2"]
+[TimeControl "40/7200:20/3600:900+30"]
+[WhiteFideId "4168119"]
+[BlackFideId "8603677"]
+[WhiteElo "2795"]
+[BlackElo "2788"]
+
+1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6 dxc6
+7. Re1 Nd7 8. d4 exd4 9. Qxd4 O-O 10. Bf4 Nc5 11. Qe3 Bg4 12. Nd4
+Qd7 13. Nc3 Rad8 14. Nf5 Ne6 15. Nxe7+ Qxe7 16. Bg3 Bh5 17. f3 f6
+18. h3 h6 19. Kh2 Bf7 20. Rad1 b6 21. a3 a5 22. Ne2 Rxd1 23. Rxd1
+Rd8 24. Rd3 c5 25. Qd2 c6 26. Rxd8+ Nxd8 27. Qf4 b5 28. Qb8 Kh7
+29. Bd6 Qd7 30. Ng3 Ne6 31. f4 h5 32. c3 c4 33. h4 Qd8 34. Qb7
+Be8 35. Nf5 Qd7 36. Qb8 Qd8 37. Qxd8 Nxd8 38. Nd4 Nb7 39. e5 Kg8
+40. Kg3 Bd7 41. Bc7 Nc5 42. Bxa5 Kf7 43. Bb4 Nd3 44. e6+ Bxe6
+45. Nxc6 Bd7 46. Nd4 Nxb2 47. Kf3 Nd3 48. g3 Nc1 49. Ke3 1/2-1/2
diff --git a/test.py b/test.py
index 73b96f71c..e1d0d50c5 100755
--- a/test.py
+++ b/test.py
@@ -2493,6 +2493,53 @@ def test_read_headers(self):
             self.assertEqual(first_drawn_game.headers["Site"], "03")
             self.assertEqual(first_drawn_game[0].move, chess.Move.from_uci("d2d3"))
 
+    def test_parse_time_control(self):
+        with open("data/pgn/nepomniachtchi-liren-game1.pgn") as pgn:
+            game = chess.pgn.read_game(pgn)
+            tc = game.time_control()
+
+            self.assertEqual(tc, chess.pgn.parse_time_control(game.headers["TimeControl"]))
+
+            self.assertEqual(tc.type, chess.pgn.TimeControlType.STANDARD)
+            self.assertEqual(len(tc.parts), 3)
+
+            tcp1, tcp2, tcp3 = tc.parts
+
+            self.assertEqual(tcp1, chess.pgn.TimeControlPart(40, 7200))
+            self.assertEqual(tcp2, chess.pgn.TimeControlPart(20, 3600))
+            self.assertEqual(tcp3, chess.pgn.TimeControlPart(0, 900, 30))
+
+        self.assertEqual(chess.pgn.TimeControlType.BULLET, chess.pgn.parse_time_control("60").type)
+        self.assertEqual(chess.pgn.TimeControlType.BULLET, chess.pgn.parse_time_control("60+1").type)
+
+        self.assertEqual(chess.pgn.TimeControlType.BLITZ, chess.pgn.parse_time_control("60+2").type)
+        self.assertEqual(chess.pgn.TimeControlType.BLITZ, chess.pgn.parse_time_control("300").type)
+        self.assertEqual(chess.pgn.TimeControlType.BLITZ, chess.pgn.parse_time_control("300+3").type)
+
+        self.assertEqual(chess.pgn.TimeControlType.RAPID, chess.pgn.parse_time_control("300+10").type)
+        self.assertEqual(chess.pgn.TimeControlType.RAPID, chess.pgn.parse_time_control("1800").type)
+        self.assertEqual(chess.pgn.TimeControlType.RAPID, chess.pgn.parse_time_control("1800+10").type)
+
+        self.assertEqual(chess.pgn.TimeControlType.STANDARD, chess.pgn.parse_time_control("1800+30").type)
+        self.assertEqual(chess.pgn.TimeControlType.STANDARD, chess.pgn.parse_time_control("5400").type)
+        self.assertEqual(chess.pgn.TimeControlType.STANDARD, chess.pgn.parse_time_control("5400+30").type)
+
+        with self.assertRaises(ValueError):
+            chess.pgn.parse_time_control("300+a")
+
+        with self.assertRaises(ValueError):
+            chess.pgn.parse_time_control("300+ad")
+
+        with self.assertRaises(ValueError):
+            chess.pgn.parse_time_control("600:20/180")
+
+        with self.assertRaises(ValueError):
+            chess.pgn.parse_time_control("abc")
+
+        with self.assertRaises(ValueError):
+            chess.pgn.parse_time_control("40/abc")
+
+
     def test_visit_board(self):
         class TraceVisitor(chess.pgn.BaseVisitor):
             def __init__(self):

From acc85c2c4ede81ccd79183cb05c2754663bcc658 Mon Sep 17 00:00:00 2001
From: mauricesvp 
Date: Wed, 2 Aug 2023 20:53:52 +0200
Subject: [PATCH 454/613] Fix mypy

---
 chess/pgn.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 72c613dd4..55eddbc29 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -1826,11 +1826,11 @@ def _parse_part(part: str) -> TimeControlPart:
         moves_time, *bonus = part.split("+")
 
         if bonus:
-            bonus = bonus[0]
-            if bonus.lower().endswith("d"):
-                tcp.delay = float(bonus[:-1])
+            _bonus = bonus[0]
+            if _bonus.lower().endswith("d"):
+                tcp.delay = float(_bonus[:-1])
             else:
-                tcp.increment = float(bonus)
+                tcp.increment = float(_bonus)
 
         moves, *time = moves_time.split("/")
         if time:

From 48bd065b14c5b61cc94227ed5532a97db8ac5a45 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 2 Aug 2023 21:25:18 +0200
Subject: [PATCH 455/613] Add ColorName literal type

---
 chess/__init__.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 0604cec54..65719fd5c 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -29,7 +29,8 @@
 
 Color = bool
 COLORS = [WHITE, BLACK] = [True, False]
-COLOR_NAMES = ["black", "white"]
+ColorName = Literal["white", "black"]
+COLOR_NAMES: List[ColorName] = ["black", "white"]
 
 PieceType = int
 PIECE_TYPES = [PAWN, KNIGHT, BISHOP, ROOK, QUEEN, KING] = range(1, 7)

From 552d6b8060a4960c765eb591c37a1252f857adbc Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 2 Aug 2023 21:48:32 +0200
Subject: [PATCH 456/613] Import TypedDict directly

---
 chess/engine.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 4e18a3cf7..ed01e353a 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -24,7 +24,7 @@
 
 from chess import Color
 from types import TracebackType
-from typing import Any, Callable, Coroutine, Deque, Dict, Generator, Generic, Iterable, Iterator, List, Literal, Mapping, MutableMapping, Optional, Tuple, Type, TypeVar, Union
+from typing import Any, Callable, Coroutine, Deque, Dict, Generator, Generic, Iterable, Iterator, List, Literal, Mapping, MutableMapping, Optional, Tuple, Type, TypedDict, TypeVar, Union
 
 WdlModel = Literal["sf", "sf16", "sf15.1", "sf15", "sf14", "sf12", "lichess"]
 
@@ -217,7 +217,7 @@ def __repr__(self) -> str:
                       if getattr(self, attr) is not None))
 
 
-class InfoDict(typing.TypedDict, total=False):
+class InfoDict(TypedDict, total=False):
     """
     Dictionary of aggregated information sent by the engine.
 

From e1732436dcd590ea02cd51810c05d9e0ea030cab Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 2 Aug 2023 22:50:44 +0200
Subject: [PATCH 457/613] Remove _policy_lock

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index ed01e353a..fcd92563d 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -46,7 +46,7 @@
 EventLoopPolicy = asyncio.DefaultEventLoopPolicy
 
 
-def run_in_background(coroutine: Callable[[concurrent.futures.Future[T]], Coroutine[Any, Any, None]], *, name: Optional[str] = None, debug: bool = False, _policy_lock: threading.Lock = threading.Lock()) -> T:
+def run_in_background(coroutine: Callable[[concurrent.futures.Future[T]], Coroutine[Any, Any, None]], *, name: Optional[str] = None, debug: bool = False) -> T:
     """
     Runs ``coroutine(future)`` in a new event loop on a background thread.
 

From 90eeeb0f9047197bcdfb26879061545cc34bbc94 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 2 Aug 2023 22:53:43 +0200
Subject: [PATCH 458/613] Fix unused debug in chess.engine.run_in_background()

---
 chess/engine.py | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index fcd92563d..5f50a1414 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -46,7 +46,7 @@
 EventLoopPolicy = asyncio.DefaultEventLoopPolicy
 
 
-def run_in_background(coroutine: Callable[[concurrent.futures.Future[T]], Coroutine[Any, Any, None]], *, name: Optional[str] = None, debug: bool = False) -> T:
+def run_in_background(coroutine: Callable[[concurrent.futures.Future[T]], Coroutine[Any, Any, None]], *, name: Optional[str] = None, debug: Optional[bool] = None) -> T:
     """
     Runs ``coroutine(future)`` in a new event loop on a background thread.
 
@@ -60,7 +60,7 @@ def run_in_background(coroutine: Callable[[concurrent.futures.Future[T]], Corout
 
     def background() -> None:
         try:
-            asyncio.run(coroutine(future))
+            asyncio.run(coroutine(future), debug=debug)
             future.cancel()
         except Exception as exc:
             future.set_exception(exc)
@@ -2894,7 +2894,7 @@ def _shutdown() -> None:
                 self.protocol.loop.call_soon_threadsafe(_shutdown)
 
     @classmethod
-    def popen(cls, Protocol: Type[Protocol], command: Union[str, List[str]], *, timeout: Optional[float] = 10.0, debug: bool = False, setpgrp: bool = False, **popen_args: Any) -> SimpleEngine:
+    def popen(cls, Protocol: Type[Protocol], command: Union[str, List[str]], *, timeout: Optional[float] = 10.0, debug: Optional[bool] = None, setpgrp: bool = False, **popen_args: Any) -> SimpleEngine:
         async def background(future: concurrent.futures.Future[SimpleEngine]) -> None:
             transport, protocol = await Protocol.popen(command, setpgrp=setpgrp, **popen_args)
             threading.current_thread().name = f"{cls.__name__} (pid={transport.get_pid()})"
@@ -2911,7 +2911,7 @@ async def background(future: concurrent.futures.Future[SimpleEngine]) -> None:
         return run_in_background(background, name=f"{cls.__name__} (command={command!r})", debug=debug)
 
     @classmethod
-    def popen_uci(cls, command: Union[str, List[str]], *, timeout: Optional[float] = 10.0, debug: bool = False, setpgrp: bool = False, **popen_args: Any) -> SimpleEngine:
+    def popen_uci(cls, command: Union[str, List[str]], *, timeout: Optional[float] = 10.0, debug: Optional[bool] = None, setpgrp: bool = False, **popen_args: Any) -> SimpleEngine:
         """
         Spawns and initializes a UCI engine.
         Returns a :class:`~chess.engine.SimpleEngine` instance.
@@ -2919,7 +2919,7 @@ def popen_uci(cls, command: Union[str, List[str]], *, timeout: Optional[float] =
         return cls.popen(UciProtocol, command, timeout=timeout, debug=debug, setpgrp=setpgrp, **popen_args)
 
     @classmethod
-    def popen_xboard(cls, command: Union[str, List[str]], *, timeout: Optional[float] = 10.0, debug: bool = False, setpgrp: bool = False, **popen_args: Any) -> SimpleEngine:
+    def popen_xboard(cls, command: Union[str, List[str]], *, timeout: Optional[float] = 10.0, debug: Optional[bool] = None, setpgrp: bool = False, **popen_args: Any) -> SimpleEngine:
         """
         Spawns and initializes an XBoard engine.
         Returns a :class:`~chess.engine.SimpleEngine` instance.

From 35b961c17b7a6dcbad98f4f3bfb9df115a28db29 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 6 Aug 2023 10:47:25 +0200
Subject: [PATCH 459/613] Avoid start_new_session if possible

---
 chess/engine.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 5f50a1414..01ee08b3e 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1180,7 +1180,11 @@ async def popen(cls: Type[ProtocolT], command: Union[str, List[str]], *, setpgrp
                 popen_args["creationflags"] = popen_args.get("creationflags", 0) | subprocess.CREATE_NEW_PROCESS_GROUP  # type: ignore
             except AttributeError:
                 # Unix.
-                popen_args["start_new_session"] = True
+                if sys.version_info >= (3, 11):
+                    popen_args["process_group"] = 0
+                else:
+                    # Before Python 3.11
+                    popen_args["start_new_session"] = True
 
         return await asyncio.get_running_loop().subprocess_exec(cls, *command, **popen_args)
 

From b6a04e8db55b6fca08250ba883aba50c60a3c589 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sun, 3 Sep 2023 21:37:44 -0700
Subject: [PATCH 460/613] Delete unused imports

---
 chess/engine.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 01ee08b3e..0b0f061dc 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -10,14 +10,12 @@
 import enum
 import logging
 import math
-import warnings
 import shlex
 import subprocess
 import sys
 import threading
 import time
 import typing
-import os
 import re
 
 import chess

From e9997d52c8c06b773a797029ee7ba8630c0829bd Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Tue, 5 Sep 2023 22:56:14 -0700
Subject: [PATCH 461/613] Create new function for parsing engine output

The function next_token() extracts the next word from a string and
removes the leading and trailing whitespace around that word. It
also returns the remainder of the string unchanged. Using this function
instead of split() gets rid of extraneous whitespace when searching
for keywords and preserves whitespace in strings generated by
users and their engines.
---
 chess/engine.py | 169 +++++++++++++++++++++++++++++++-----------------
 1 file changed, 110 insertions(+), 59 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 0b0f061dc..22b6125dd 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1303,14 +1303,15 @@ def start(self, engine: UciProtocol) -> None:
                 engine.send_line("uci")
 
             def line_received(self, engine: UciProtocol, line: str) -> None:
-                if line == "uciok" and not self.result.done():
+                token, remaining = _next_token(line)
+                if line.strip() == "uciok" and not self.result.done():
                     engine.initialized = True
                     self.result.set_result(None)
                     self.set_finished()
-                elif line.startswith("option "):
-                    self._option(engine, line.split(" ", 1)[1])
-                elif line.startswith("id "):
-                    self._id(engine, line.split(" ", 1)[1])
+                elif token == "option":
+                    self._option(engine, remaining)
+                elif token == "id":
+                    self._id(engine, remaining)
 
             def _option(self, engine: UciProtocol, arg: str) -> None:
                 current_parameter = None
@@ -1371,8 +1372,8 @@ def _option(self, engine: UciProtocol, arg: str) -> None:
                     engine.target_config[option.name] = option.default
 
             def _id(self, engine: UciProtocol, arg: str) -> None:
-                key, value = arg.split(" ", 1)
-                engine.id[key] = value
+                key, value = _next_token(arg)
+                engine.id[key] = value.strip()
 
         return await self.communicate(UciInitializeCommand)
 
@@ -1587,11 +1588,12 @@ def start(self, engine: UciProtocol) -> None:
                     self._readyok(engine)
 
             def line_received(self, engine: UciProtocol, line: str) -> None:
-                if line.startswith("info "):
-                    self._info(engine, line.split(" ", 1)[1])
-                elif line.startswith("bestmove "):
-                    self._bestmove(engine, line.split(" ", 1)[1])
-                elif line == "readyok" and self.sent_isready:
+                token, remaining = _next_token(line)
+                if token == "info":
+                    self._info(engine, remaining)
+                elif token == "bestmove":
+                    self._bestmove(engine, remaining)
+                elif line.strip() == "readyok" and self.sent_isready:
                     self._readyok(engine)
                 else:
                     LOGGER.warning("%s: Unexpected engine output: %r", engine, line)
@@ -1679,11 +1681,12 @@ def start(self, engine: UciProtocol) -> None:
                     self._readyok(engine)
 
             def line_received(self, engine: UciProtocol, line: str) -> None:
-                if line.startswith("info "):
-                    self._info(engine, line.split(" ", 1)[1])
-                elif line.startswith("bestmove "):
-                    self._bestmove(engine, line.split(" ", 1)[1])
-                elif line == "readyok" and self.sent_isready:
+                token, remaining = _next_token(line)
+                if token == "info":
+                    self._info(engine, remaining)
+                elif token == "bestmove":
+                    self._bestmove(engine, remaining)
+                elif line.strip() == "readyok" and self.sent_isready:
                     self._readyok(engine)
                 else:
                     LOGGER.warning("%s: Unexpected engine output: %r", engine, line)
@@ -1733,34 +1736,39 @@ def _parse_uci_info(arg: str, root_board: chess.Board, selector: Info = INFO_ALL
     if not selector:
         return info
 
-    tokens = arg.split(" ")
-    while tokens:
-        parameter = tokens.pop(0)
+    remaining_line = arg
+    while remaining_line:
+        parameter, remaining_line = _next_token(remaining_line)
 
         if parameter == "string":
-            info["string"] = " ".join(tokens)
+            info["string"] = remaining_line
             break
         elif parameter in ["depth", "seldepth", "nodes", "multipv", "currmovenumber", "hashfull", "nps", "tbhits", "cpuload"]:
             try:
-                info[parameter] = int(tokens.pop(0))  # type: ignore
+                number, remaining_line = _next_token(remaining_line)
+                info[parameter] = int(number)  # type: ignore
             except (ValueError, IndexError):
                 LOGGER.error("Exception parsing %s from info: %r", parameter, arg)
         elif parameter == "time":
             try:
-                info["time"] = int(tokens.pop(0)) / 1000.0
+                time_ms, remaining_line = _next_token(remaining_line)
+                info["time"] = int(time_ms) / 1000.0
             except (ValueError, IndexError):
                 LOGGER.error("Exception parsing %s from info: %r", parameter, arg)
         elif parameter == "ebf":
             try:
-                info["ebf"] = float(tokens.pop(0))
+                number, remaining_line = _next_token(remaining_line)
+                info["ebf"] = float(number)
             except (ValueError, IndexError):
                 LOGGER.error("Exception parsing %s from info: %r", parameter, arg)
         elif parameter == "score" and selector & INFO_SCORE:
             try:
-                kind = tokens.pop(0)
-                value = tokens.pop(0)
-                if tokens and tokens[0] in ["lowerbound", "upperbound"]:
-                    info[tokens.pop(0)] = True  # type: ignore
+                kind, remaining_line = _next_token(remaining_line)
+                value, remaining_line = _next_token(remaining_line)
+                token, remaining_after_token = _next_token(remaining_line)
+                if token in ["lowerbound", "upperbound"]:
+                    info[token] = True  # type: ignore
+                    remaining_line = remaining_after_token
                 if kind == "cp":
                     info["score"] = PovScore(Cp(int(value)), root_board.turn)
                 elif kind == "mate":
@@ -1771,7 +1779,8 @@ def _parse_uci_info(arg: str, root_board: chess.Board, selector: Info = INFO_ALL
                 LOGGER.error("Exception parsing score from info: %r", arg)
         elif parameter == "currmove":
             try:
-                info["currmove"] = chess.Move.from_uci(tokens.pop(0))
+                current_move, remaining_line = _next_token(remaining_line)
+                info["currmove"] = chess.Move.from_uci(current_move)
             except (ValueError, IndexError):
                 LOGGER.error("Exception parsing currmove from info: %r", arg)
         elif parameter == "currline" and selector & INFO_CURRLINE:
@@ -1779,13 +1788,19 @@ def _parse_uci_info(arg: str, root_board: chess.Board, selector: Info = INFO_ALL
                 if "currline" not in info:
                     info["currline"] = {}
 
-                cpunr = int(tokens.pop(0))
+                cpunr_text, remaining_line = _next_token(remaining_line)
+                cpunr = int(cpunr_text)
                 currline: List[chess.Move] = []
                 info["currline"][cpunr] = currline
 
                 board = root_board.copy(stack=False)
-                while tokens and UCI_REGEX.match(tokens[0]):
-                    currline.append(board.push_uci(tokens.pop(0)))
+                while True:
+                    next_move, remaining_line_after_move = _next_token(remaining_line)
+                    if UCI_REGEX.match(next_move):
+                        currline.append(board.push_uci(next_move))
+                        remaining_line = remaining_line_after_move
+                    else:
+                        break
             except (ValueError, IndexError):
                 LOGGER.error("Exception parsing currline from info: %r, position at root: %s", arg, root_board.fen())
         elif parameter == "refutation" and selector & INFO_REFUTATION:
@@ -1794,13 +1809,19 @@ def _parse_uci_info(arg: str, root_board: chess.Board, selector: Info = INFO_ALL
                     info["refutation"] = {}
 
                 board = root_board.copy(stack=False)
-                refuted = board.push_uci(tokens.pop(0))
+                refuted_text, remaining_line = _next_token(remaining_line)
+                refuted = board.push_uci(refuted_text)
 
                 refuted_by: List[chess.Move] = []
                 info["refutation"][refuted] = refuted_by
 
-                while tokens and UCI_REGEX.match(tokens[0]):
-                    refuted_by.append(board.push_uci(tokens.pop(0)))
+                while True:
+                    token, remaining_line_after_move = _next_token(remaining_line)
+                    if UCI_REGEX.match(token):
+                        refuted_by.append(board.push_uci(token))
+                        remaining_line = remaining_line_after_move
+                    else:
+                        break
             except (ValueError, IndexError):
                 LOGGER.error("Exception parsing refutation from info: %r, position at root: %s", arg, root_board.fen())
         elif parameter == "pv" and selector & INFO_PV:
@@ -1808,13 +1829,21 @@ def _parse_uci_info(arg: str, root_board: chess.Board, selector: Info = INFO_ALL
                 pv: List[chess.Move] = []
                 info["pv"] = pv
                 board = root_board.copy(stack=False)
-                while tokens and UCI_REGEX.match(tokens[0]):
-                    pv.append(board.push_uci(tokens.pop(0)))
+                while True:
+                    token, remaining_line_after_pv = _next_token(remaining_line)
+                    if UCI_REGEX.match(token):
+                        pv.append(board.push_uci(token))
+                        remaining_line = remaining_line_after_pv
+                    else:
+                        break
             except (ValueError, IndexError):
                 LOGGER.error("Exception parsing pv from info: %r, position at root: %s", arg, root_board.fen())
         elif parameter == "wdl":
             try:
-                info["wdl"] = PovWdl(Wdl(int(tokens.pop(0)), int(tokens.pop(0)), int(tokens.pop(0))), root_board.turn)
+                wins, remaining_line = _next_token(remaining_line)
+                draws, remaining_line = _next_token(remaining_line)
+                losses, remaining_line = _next_token(remaining_line)
+                info["wdl"] = PovWdl(Wdl(int(wins), int(draws), int(losses)), root_board.turn)
             except (ValueError, IndexError):
                 LOGGER.error("Exception parsing wdl from info: %r", arg)
 
@@ -1944,10 +1973,11 @@ def timeout(self, engine: XBoardProtocol) -> None:
                 self.end(engine)
 
             def line_received(self, engine: XBoardProtocol, line: str) -> None:
-                if line.startswith("#"):
+                token, remaining = _next_token(line)
+                if token.startswith("#"):
                     pass
-                elif line.startswith("feature "):
-                    self._feature(engine, line.split(" ", 1)[1])
+                elif token == "feature":
+                    self._feature(engine, remaining)
                 elif XBOARD_ERROR_REGEX.match(line):
                     raise EngineError(line)
 
@@ -2159,32 +2189,35 @@ def start(self, engine: XBoardProtocol) -> None:
                 engine.send_line("go")
 
             def line_received(self, engine: XBoardProtocol, line: str) -> None:
-                if line.startswith("move "):
-                    self._move(engine, line.split(" ", 1)[1])
-                elif line.startswith("Hint: "):
-                    self._hint(engine, line.split(" ", 1)[1])
-                elif line == self.pong_after_move:
-                    if not self.result.done():
-                        self.result.set_result(self.play_result)
-                    if not ponder:
+                token, remaining = _next_token(line)
+                if token == "move":
+                    self._move(engine, remaining.strip())
+                elif token == "Hint:":
+                    self._hint(engine, remaining.strip())
+                elif token == "pong":
+                    pong_line = f"{token} {remaining.strip()}"
+                    if pong_line == self.pong_after_move:
+                        if not self.result.done():
+                            self.result.set_result(self.play_result)
+                        if not ponder:
+                            self.set_finished()
+                    elif pong_line == self.pong_after_ponder:
+                        if not self.result.done():
+                            self.result.set_result(self.play_result)
                         self.set_finished()
-                elif line == self.pong_after_ponder:
-                    if not self.result.done():
-                        self.result.set_result(self.play_result)
-                    self.set_finished()
-                elif line == "offer draw":
+                elif f"{token} {remaining.strip()}" == "offer draw":
                     if not self.result.done():
                         self.play_result.draw_offered = True
                     self._ping_after_move(engine)
-                elif line == "resign":
+                elif line.strip() == "resign":
                     if not self.result.done():
                         self.play_result.resigned = True
                     self._ping_after_move(engine)
-                elif line.startswith("1-0") or line.startswith("0-1") or line.startswith("1/2-1/2"):
+                elif token in ["1-0", "0-1", "1/2-1/2"]:
                     if "resign" in line and not self.result.done():
                         self.play_result.resigned = True
                     self._ping_after_move(engine)
-                elif line.startswith("#"):
+                elif token.startswith("#"):
                     pass
                 elif XBOARD_ERROR_REGEX.match(line):
                     engine.first_game = True  # Board state might no longer be in sync
@@ -2291,11 +2324,12 @@ def start(self, engine: XBoardProtocol) -> None:
                     self.time_limit_handle = None
 
             def line_received(self, engine: XBoardProtocol, line: str) -> None:
-                if line.startswith("#"):
+                token, remaining = _next_token(line)
+                if token.startswith("#"):
                     pass
                 elif len(line.split()) >= 4 and line.lstrip()[0].isdigit():
                     self._post(engine, line)
-                elif line == self.final_pong:
+                elif f"{token} {remaining.strip()}" == self.final_pong:
                     self.end(engine)
                 elif XBOARD_ERROR_REGEX.match(line):
                     engine.first_game = True  # Board state might no longer be in sync
@@ -2551,6 +2585,23 @@ def _parse_xboard_post(line: str, root_board: chess.Board, selector: Info = INFO
     return info
 
 
+def _next_token(line: str) -> tuple[str, str]:
+    """Get the next token in a whitespace-delimited line of text.
+
+    The result is returned as a 2-part tuple of strings.
+
+    If the input line is empty or all whitespace, then the result is two
+    empty strings.
+
+    If the input line is not empty and not completely whitespace, then
+    the first element of the returned tuple is a single word with
+    leading and trailing whitespace removed. The second element is the
+    unchanged rest of the line."""
+
+    parts = line.split(maxsplit=1)
+    return (parts[0] if parts else "", parts[1] if len(parts) == 2 else "")
+
+
 class BestMove:
     """Returned by :func:`chess.engine.AnalysisResult.wait()`."""
 

From a68636e7a82841e4389b1d53390b6b33ff7a43e5 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sun, 10 Sep 2023 01:34:03 -0700
Subject: [PATCH 462/613] Split on all whitespace

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 22b6125dd..c8ed5cd4d 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1324,7 +1324,7 @@ def _option(self, engine: UciProtocol, arg: str) -> None:
                 current_var = None
                 var = []
 
-                for token in arg.strip().split(" "):
+                for token in arg.split():
                     if token == "name" and not name:
                         current_parameter = "name"
                     elif token == "type" and not type:

From dbc278f7cedb33409fc60186df20e1ac55ab39b3 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sun, 10 Sep 2023 01:34:40 -0700
Subject: [PATCH 463/613] Gather repeated code in option parsing

---
 chess/engine.py | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index c8ed5cd4d..1ec7c2c8e 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1323,6 +1323,13 @@ def _option(self, engine: UciProtocol, arg: str) -> None:
                 max = None
                 current_var = None
                 var = []
+                
+                def parse_min_max_value(token: str, which: Literal["min", "max"]):
+                    try:
+                        return int(token)
+                    except ValueError:
+                        LOGGER.exception(f"Exception parsing option {which}")
+                        return None
 
                 for token in arg.split():
                     if token == "name" and not name:
@@ -1349,15 +1356,9 @@ def _option(self, engine: UciProtocol, arg: str) -> None:
                     elif current_parameter == "var":
                         current_var.append(token)
                     elif current_parameter == "min":
-                        try:
-                            min = int(token)
-                        except ValueError:
-                            LOGGER.exception("Exception parsing option min")
+                        min = parse_min_max_value(token, "min")
                     elif current_parameter == "max":
-                        try:
-                            max = int(token)
-                        except ValueError:
-                            LOGGER.exception("Exception parsing option max")
+                        max = parse_min_max_value(token, "max")
 
                 if current_var is not None:
                     var.append(" ".join(current_var))

From 2e6ff83ace87d54da0cea6c679ae1b642afe8331 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sun, 10 Sep 2023 02:09:09 -0700
Subject: [PATCH 464/613] Create function for repeated code

---
 chess/engine.py | 43 +++++++++++++++----------------------------
 1 file changed, 15 insertions(+), 28 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 1ec7c2c8e..72681a627 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1732,6 +1732,18 @@ async def quit(self) -> None:
 
 UCI_REGEX = re.compile(r"^[a-h][1-8][a-h][1-8][pnbrqk]?|[PNBRQK]@[a-h][1-8]|0000\Z")
 
+def _create_variation_line(root_board: chess.Board, line: str) -> tuple[list[chess.Move], str]:
+    board = root_board.copy(stack=False)
+    currline: list[chess.Move] = []
+    while True:
+        next_move, remaining_line_after_move = _next_token(line)
+        if UCI_REGEX.match(next_move):
+            currline.append(board.push_uci(next_move))
+            line = remaining_line_after_move
+        else:
+            return currline, line
+        
+
 def _parse_uci_info(arg: str, root_board: chess.Board, selector: Info = INFO_ALL) -> InfoDict:
     info: InfoDict = {}
     if not selector:
@@ -1791,17 +1803,8 @@ def _parse_uci_info(arg: str, root_board: chess.Board, selector: Info = INFO_ALL
 
                 cpunr_text, remaining_line = _next_token(remaining_line)
                 cpunr = int(cpunr_text)
-                currline: List[chess.Move] = []
+                currline, remaining_line = _create_variation_line(root_board, remaining_line)
                 info["currline"][cpunr] = currline
-
-                board = root_board.copy(stack=False)
-                while True:
-                    next_move, remaining_line_after_move = _next_token(remaining_line)
-                    if UCI_REGEX.match(next_move):
-                        currline.append(board.push_uci(next_move))
-                        remaining_line = remaining_line_after_move
-                    else:
-                        break
             except (ValueError, IndexError):
                 LOGGER.error("Exception parsing currline from info: %r, position at root: %s", arg, root_board.fen())
         elif parameter == "refutation" and selector & INFO_REFUTATION:
@@ -1813,30 +1816,14 @@ def _parse_uci_info(arg: str, root_board: chess.Board, selector: Info = INFO_ALL
                 refuted_text, remaining_line = _next_token(remaining_line)
                 refuted = board.push_uci(refuted_text)
 
-                refuted_by: List[chess.Move] = []
+                refuted_by, remaining_line = _create_variation_line(board, remaining_line)
                 info["refutation"][refuted] = refuted_by
-
-                while True:
-                    token, remaining_line_after_move = _next_token(remaining_line)
-                    if UCI_REGEX.match(token):
-                        refuted_by.append(board.push_uci(token))
-                        remaining_line = remaining_line_after_move
-                    else:
-                        break
             except (ValueError, IndexError):
                 LOGGER.error("Exception parsing refutation from info: %r, position at root: %s", arg, root_board.fen())
         elif parameter == "pv" and selector & INFO_PV:
             try:
-                pv: List[chess.Move] = []
+                pv, remaining_line = _create_variation_line(root_board, remaining_line)
                 info["pv"] = pv
-                board = root_board.copy(stack=False)
-                while True:
-                    token, remaining_line_after_pv = _next_token(remaining_line)
-                    if UCI_REGEX.match(token):
-                        pv.append(board.push_uci(token))
-                        remaining_line = remaining_line_after_pv
-                    else:
-                        break
             except (ValueError, IndexError):
                 LOGGER.error("Exception parsing pv from info: %r, position at root: %s", arg, root_board.fen())
         elif parameter == "wdl":

From 7aaf9d324f28e9b6a3abc82e284b7e5224b8438f Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sun, 10 Sep 2023 02:20:11 -0700
Subject: [PATCH 465/613] Fix tox.ini comments

Latest version of flake8 no longer allows inline comments in config file.
---
 tox.ini | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/tox.ini b/tox.ini
index 665e9f38b..f629723cd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -20,11 +20,18 @@ commands =
 
 [flake8]
 ignore =
-    E126 E131  # Allow over-indent and unaligned indent
-    E241  # Allow indenting array elements
-    E302 E305  # Allow grouping functions
-    E741  # Allow "ambiguous" variable names
-    W504  # Allow binary operators before EOL (end of line)
-    E704 E301  # Allow "def overloaded(): ..."
-    E722  # Bare except (with or without reraise)
+    # Allow over-indent and unaligned indent
+    E126 E131
+    # Allow indenting array elements
+    E241
+    # Allow grouping functions
+    E302 E305
+    # Allow "ambiguous" variable names
+    E741
+    # Allow binary operators before EOL (end of line)
+    W504
+    # Allow "def overloaded(): ..."
+    E704 E301
+    # Bare except (with or without reraise)
+    E722
 max-line-length = 160

From 3cb886c7a0bae1c1163db6340da8c989d4625a66 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sun, 10 Sep 2023 02:22:53 -0700
Subject: [PATCH 466/613] Add return value annotation

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 72681a627..74aeb9980 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1324,7 +1324,7 @@ def _option(self, engine: UciProtocol, arg: str) -> None:
                 current_var = None
                 var = []
                 
-                def parse_min_max_value(token: str, which: Literal["min", "max"]):
+                def parse_min_max_value(token: str, which: Literal["min", "max"]) -> Optional[int]:
                     try:
                         return int(token)
                     except ValueError:

From 69041525dd05b496ab01d839880f437093f66536 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sun, 10 Sep 2023 16:22:58 -0700
Subject: [PATCH 467/613] Delete trailing whitespace

---
 chess/engine.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 74aeb9980..7a8bbc845 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1323,7 +1323,7 @@ def _option(self, engine: UciProtocol, arg: str) -> None:
                 max = None
                 current_var = None
                 var = []
-                
+
                 def parse_min_max_value(token: str, which: Literal["min", "max"]) -> Optional[int]:
                     try:
                         return int(token)
@@ -1742,7 +1742,7 @@ def _create_variation_line(root_board: chess.Board, line: str) -> tuple[list[che
             line = remaining_line_after_move
         else:
             return currline, line
-        
+
 
 def _parse_uci_info(arg: str, root_board: chess.Board, selector: Info = INFO_ALL) -> InfoDict:
     info: InfoDict = {}

From 55060d497b2c56d96ff5935329645c5d2f3dc818 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sun, 10 Sep 2023 16:24:24 -0700
Subject: [PATCH 468/613] Simplify UCI option parsing with regex

---
 chess/engine.py | 32 +++++++++++++-------------------
 1 file changed, 13 insertions(+), 19 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 7a8bbc845..80312fa19 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1274,6 +1274,8 @@ def __repr__(self) -> str:
         return "<{} at {:#x} (state={}, result={}, finished={}>".format(type(self).__name__, id(self), self.state, self.result, self.finished)
 
 
+UCI_OPTION_REGEX = re.compile(r"\s*(name|type|default|min|max|var)\s*")
+
 class UciProtocol(Protocol):
     """
     An implementation of the
@@ -1314,14 +1316,11 @@ def line_received(self, engine: UciProtocol, line: str) -> None:
                     self._id(engine, remaining)
 
             def _option(self, engine: UciProtocol, arg: str) -> None:
-                current_parameter = None
-
-                name: List[str] = []
-                type: List[str] = []
-                default: List[str] = []
+                name = ""
+                type = ""
+                default = ""
                 min = None
                 max = None
-                current_var = None
                 var = []
 
                 def parse_min_max_value(token: str, which: Literal["min", "max"]) -> Optional[int]:
@@ -1331,7 +1330,8 @@ def parse_min_max_value(token: str, which: Literal["min", "max"]) -> Optional[in
                         LOGGER.exception(f"Exception parsing option {which}")
                         return None
 
-                for token in arg.split():
+                current_parameter = None
+                for token in UCI_OPTION_REGEX.split(arg):
                     if token == "name" and not name:
                         current_parameter = "name"
                     elif token == "type" and not type:
@@ -1344,27 +1344,21 @@ def parse_min_max_value(token: str, which: Literal["min", "max"]) -> Optional[in
                         current_parameter = "max"
                     elif token == "var":
                         current_parameter = "var"
-                        if current_var is not None:
-                            var.append(" ".join(current_var))
-                        current_var = []
                     elif current_parameter == "name":
-                        name.append(token)
+                        name = token
                     elif current_parameter == "type":
-                        type.append(token)
+                        type = token
                     elif current_parameter == "default":
-                        default.append(token)
+                        default = token
                     elif current_parameter == "var":
-                        current_var.append(token)
+                        var.append(token)
                     elif current_parameter == "min":
                         min = parse_min_max_value(token, "min")
                     elif current_parameter == "max":
                         max = parse_min_max_value(token, "max")
 
-                if current_var is not None:
-                    var.append(" ".join(current_var))
-
-                without_default = Option(" ".join(name), " ".join(type), None, min, max, var)
-                option = Option(without_default.name, without_default.type, without_default.parse(" ".join(default)), min, max, var)
+                without_default = Option(name, type, None, min, max, var)
+                option = Option(without_default.name, without_default.type, without_default.parse(default), min, max, var)
                 engine.options[option.name] = option
 
                 if option.default is not None:

From 4cb2b9a85f682091500ccb947dda73e305361e94 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Tue, 12 Sep 2023 23:06:30 -0700
Subject: [PATCH 469/613] Simplify UCI option parsing

Replace repeated code with a dictionary.
---
 chess/engine.py | 52 ++++++++++++++++++-------------------------------
 1 file changed, 19 insertions(+), 33 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 80312fa19..33c2a3e8c 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1276,6 +1276,7 @@ def __repr__(self) -> str:
 
 UCI_OPTION_REGEX = re.compile(r"\s*(name|type|default|min|max|var)\s*")
 
+
 class UciProtocol(Protocol):
     """
     An implementation of the
@@ -1316,46 +1317,31 @@ def line_received(self, engine: UciProtocol, line: str) -> None:
                     self._id(engine, remaining)
 
             def _option(self, engine: UciProtocol, arg: str) -> None:
-                name = ""
-                type = ""
-                default = ""
-                min = None
-                max = None
+                current_parameter = None
+                option_parts: dict[str, str] = {k: "" for k in ["name", "type", "default", "min", "max"]}
                 var = []
 
-                def parse_min_max_value(token: str, which: Literal["min", "max"]) -> Optional[int]:
+                for token in UCI_OPTION_REGEX.split(arg):
+                    if token == "var" or (token in option_parts and not option_parts[token]):
+                        current_parameter = token
+                    elif current_parameter == "var":
+                        var.append(token)
+                    elif current_parameter:
+                        option_parts[current_parameter] = token
+
+                def parse_min_max_value(option_parts: dict[str, str], which: Literal["min", "max"]) -> Optional[int]:
                     try:
-                        return int(token)
+                        number = option_parts[which]
+                        return int(number) if number else None
                     except ValueError:
                         LOGGER.exception(f"Exception parsing option {which}")
                         return None
 
-                current_parameter = None
-                for token in UCI_OPTION_REGEX.split(arg):
-                    if token == "name" and not name:
-                        current_parameter = "name"
-                    elif token == "type" and not type:
-                        current_parameter = "type"
-                    elif token == "default" and not default:
-                        current_parameter = "default"
-                    elif token == "min" and min is None:
-                        current_parameter = "min"
-                    elif token == "max" and max is None:
-                        current_parameter = "max"
-                    elif token == "var":
-                        current_parameter = "var"
-                    elif current_parameter == "name":
-                        name = token
-                    elif current_parameter == "type":
-                        type = token
-                    elif current_parameter == "default":
-                        default = token
-                    elif current_parameter == "var":
-                        var.append(token)
-                    elif current_parameter == "min":
-                        min = parse_min_max_value(token, "min")
-                    elif current_parameter == "max":
-                        max = parse_min_max_value(token, "max")
+                name = option_parts["name"]
+                type = option_parts["type"]
+                default = option_parts["default"]
+                min = parse_min_max_value(option_parts, "min")
+                max = parse_min_max_value(option_parts, "max")
 
                 without_default = Option(name, type, None, min, max, var)
                 option = Option(without_default.name, without_default.type, without_default.parse(default), min, max, var)

From fb991b817718770fdd0291ae4aa962df2ce9cf61 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Tue, 12 Sep 2023 23:28:50 -0700
Subject: [PATCH 470/613] Consolidate UCI option parameter list

---
 chess/engine.py | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 33c2a3e8c..126668c7d 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1274,9 +1274,6 @@ def __repr__(self) -> str:
         return "<{} at {:#x} (state={}, result={}, finished={}>".format(type(self).__name__, id(self), self.state, self.result, self.finished)
 
 
-UCI_OPTION_REGEX = re.compile(r"\s*(name|type|default|min|max|var)\s*")
-
-
 class UciProtocol(Protocol):
     """
     An implementation of the
@@ -1321,7 +1318,9 @@ def _option(self, engine: UciProtocol, arg: str) -> None:
                 option_parts: dict[str, str] = {k: "" for k in ["name", "type", "default", "min", "max"]}
                 var = []
 
-                for token in UCI_OPTION_REGEX.split(arg):
+                parameters = list(option_parts.keys()) + ['var']
+                option_regex = fr"\s*({'|'.join(parameters)})\s*"
+                for token in re.split(option_regex, arg):
                     if token == "var" or (token in option_parts and not option_parts[token]):
                         current_parameter = token
                     elif current_parameter == "var":

From f22e3282b69abe37204589829d1eb09267174261 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 13 Sep 2023 00:12:22 -0700
Subject: [PATCH 471/613] Trim whitespace from option line

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 126668c7d..45fe56372 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1320,7 +1320,7 @@ def _option(self, engine: UciProtocol, arg: str) -> None:
 
                 parameters = list(option_parts.keys()) + ['var']
                 option_regex = fr"\s*({'|'.join(parameters)})\s*"
-                for token in re.split(option_regex, arg):
+                for token in re.split(option_regex, arg.strip()):
                     if token == "var" or (token in option_parts and not option_parts[token]):
                         current_parameter = token
                     elif current_parameter == "var":

From f2fd4d3257e7f0cf8078cafa44a25a9d6e4e40c9 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 13 Sep 2023 00:26:11 -0700
Subject: [PATCH 472/613] Strip whitespace when receiving "readyok"

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 45fe56372..9a7a0aa8a 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1387,7 +1387,7 @@ def start(self, engine: UciProtocol) -> None:
                 engine._isready()
 
             def line_received(self, engine: UciProtocol, line: str) -> None:
-                if line == "readyok":
+                if line.strip() == "readyok":
                     self.result.set_result(None)
                     self.set_finished()
                 else:

From 312e477ad24905941d3adbaf8e4b4aaa002e2ba3 Mon Sep 17 00:00:00 2001
From: Josh Giesbrecht 
Date: Fri, 22 Sep 2023 20:52:21 -0700
Subject: [PATCH 473/613] Update README.rst

PicoChess URL seems to have changed - .org domain goes to a domain-for-sale page.
---
 README.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.rst b/README.rst
index 8ab138666..f4cfd955c 100644
--- a/README.rst
+++ b/README.rst
@@ -338,7 +338,7 @@ If you like, share interesting things you are using python-chess for, for exampl
 +------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
 
 * extensions to build engines (search and evaluation) – https://github.com/Mk-Chan/python-chess-engine-extensions
-* a stand-alone chess computer based on DGT board – http://www.picochess.org/
+* a stand-alone chess computer based on DGT board – http://picochess.com/
 * a bridge between Lichess API and chess engines – https://github.com/careless25/lichess-bot
 * a command-line PGN annotator – https://github.com/rpdelaney/python-chess-annotator
 * an HTTP microservice to render board images – https://github.com/niklasf/web-boardimage

From c0bb57204f7f24c8640ba81a819b41ee3e17f253 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Fri, 22 Sep 2023 21:04:30 -0700
Subject: [PATCH 474/613] Update lichess-bot URL in README.rst

---
 README.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.rst b/README.rst
index 8ab138666..cf249e466 100644
--- a/README.rst
+++ b/README.rst
@@ -339,7 +339,7 @@ If you like, share interesting things you are using python-chess for, for exampl
 
 * extensions to build engines (search and evaluation) – https://github.com/Mk-Chan/python-chess-engine-extensions
 * a stand-alone chess computer based on DGT board – http://www.picochess.org/
-* a bridge between Lichess API and chess engines – https://github.com/careless25/lichess-bot
+* a bridge between Lichess API and chess engines – https://github.com/lichess-bot-devs/lichess-bot
 * a command-line PGN annotator – https://github.com/rpdelaney/python-chess-annotator
 * an HTTP microservice to render board images – https://github.com/niklasf/web-boardimage
 * building a toy chess engine with alpha-beta pruning, piece-square tables, and move ordering – https://healeycodes.com/building-my-own-chess-engine/

From e773cd4eb93519397fe3eea0a8f92cc4662c718c Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 23 Sep 2023 12:45:55 +0200
Subject: [PATCH 475/613] Try explicitly installing and using sphinx-rtd-theme
 (#1044)

---
 docs/conf.py          | 2 +-
 docs/requirements.txt | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/docs/conf.py b/docs/conf.py
index 22f960575..a6e8a79d9 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -49,4 +49,4 @@
 
 # The theme to use for HTML and HTML Help pages. See the documentation for
 # a list of built-in themes.
-html_theme = "default"
+html_theme = "sphinx_rtd_theme"
diff --git a/docs/requirements.txt b/docs/requirements.txt
index d99b8c473..a63c6a7ca 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,2 +1,3 @@
 Sphinx==6.1.2
 sphinxcontrib-jquery==4.1
+sphinx-rtd-theme==1.3.0

From 97b887ac723d748cbdfe5597971cfd75b520911d Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 30 Sep 2023 18:40:04 +0200
Subject: [PATCH 476/613] Simplify _EmptyMmap.madvise signature

---
 chess/polyglot.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/polyglot.py b/chess/polyglot.py
index ac339902c..cdf9b0c2f 100644
--- a/chess/polyglot.py
+++ b/chess/polyglot.py
@@ -312,7 +312,7 @@ def size(self) -> int:
     def close(self) -> None:
         pass
 
-    def madvise(self, option: int, start: int = ..., length: int = ...) -> None:
+    def madvise(self, option: int) -> None:
         pass
 
 

From 2093a7348edf709d1128ad3aed4707c22e6ee739 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 30 Sep 2023 18:49:47 +0200
Subject: [PATCH 477/613] Fix local chess.engine.InfoDict in type hint

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 9a7a0aa8a..b1d3896ab 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2597,7 +2597,7 @@ class AnalysisResult:
     Automatically stops the analysis when used as a context manager.
     """
 
-    multipv: List[chess.engine.InfoDict]
+    multipv: List[InfoDict]
     """
     A list of dictionaries with aggregated information sent by the engine.
     One item for each root move.

From 6f4d35a0bb0f88cbe9f1fccb46a4babc22d098cf Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 30 Sep 2023 19:29:50 +0200
Subject: [PATCH 478/613] Remove some unused loop variables

---
 chess/gaviota.py | 12 ++++++------
 chess/syzygy.py  |  2 +-
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/chess/gaviota.py b/chess/gaviota.py
index c2439728f..15371eb19 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -147,7 +147,7 @@ def init_pp48_idx() -> Tuple[List[List[int]], List[int], List[int]]:
     MAX_I = 48
     MAX_J = 48
     idx = 0
-    pp48_idx = [[-1] * MAX_J for i in range(MAX_I)]
+    pp48_idx = [[-1] * MAX_J for _ in range(MAX_I)]
     pp48_sq_x = [NOSQUARE] * MAX_PP48_INDEX
     pp48_sq_y = [NOSQUARE] * MAX_PP48_INDEX
 
@@ -173,7 +173,7 @@ def init_ppp48_idx() -> Tuple[List[List[List[int]]], List[int], List[int], List[
     MAX_I = 48
     MAX_J = 48
     MAX_K = 48
-    ppp48_idx = [[[-1] * MAX_I for j in range(MAX_J)] for k in range(MAX_K)]
+    ppp48_idx = [[[-1] * MAX_I for _ in range(MAX_J)] for _ in range(MAX_K)]
     ppp48_sq_x = [NOSQUARE] * MAX_PPP48_INDEX
     ppp48_sq_y = [NOSQUARE] * MAX_PPP48_INDEX
     ppp48_sq_z = [NOSQUARE] * MAX_PPP48_INDEX
@@ -210,7 +210,7 @@ def init_ppp48_idx() -> Tuple[List[List[List[int]]], List[int], List[int], List[
 
 
 def init_aaidx() -> Tuple[List[int], List[List[int]]]:
-    aaidx = [[-1] * 64 for y in range(64)]
+    aaidx = [[-1] * 64 for _ in range(64)]
     aabase = [0] * MAX_AAINDEX
 
     idx = 0
@@ -240,7 +240,7 @@ def init_aaa() -> Tuple[List[int], List[List[int]]]:
         aaa_base[a + 1] = accum
 
     # Get aaa_xyz.
-    aaa_xyz = [[-1] * 3 for idx in range(MAX_AAAINDEX)]
+    aaa_xyz = [[-1] * 3 for _ in range(MAX_AAAINDEX)]
 
     idx = 0
     for z in range(64):
@@ -319,7 +319,7 @@ def wsq_to_pidx48(pawn: int) -> int:
     return idx48
 
 def init_ppidx() -> Tuple[List[List[int]], List[int], List[int]]:
-    ppidx = [[-1] * 48 for i in range(24)]
+    ppidx = [[-1] * 48 for _ in range(24)]
     pp_hi24 = [-1] * MAX_PPINDEX
     pp_lo48 = [-1] * MAX_PPINDEX
 
@@ -379,7 +379,7 @@ def norm_kkindex(x: chess.Square, y: chess.Square) -> Tuple[int, int]:
     return x, y
 
 def init_kkidx() -> Tuple[List[List[int]], List[int], List[int]]:
-    kkidx = [[-1] * 64 for x in range(64)]
+    kkidx = [[-1] * 64 for _ in range(64)]
     bksq = [-1] * MAX_KKINDEX
     wksq = [-1] * MAX_KKINDEX
     idx = 0
diff --git a/chess/syzygy.py b/chess/syzygy.py
index 96a17e921..8953b8e6b 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -1257,7 +1257,7 @@ def init_table_dtz(self) -> None:
             self.norm = [0 for _ in range(self.num)]
             self.tb_size = [0, 0, 0, 0]
             self.size = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
-            self.files = [PawnFileDataDtz() for f in range(4)]
+            self.files = [PawnFileDataDtz() for _ in range(4)]
 
             files = 4 if self.data[4] & 0x02 else 1
 

From 15e3584ff65c46c6b1cecaf14b6fc25868587a93 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 30 Sep 2023 19:44:41 +0200
Subject: [PATCH 479/613] Provide type hints for empty lists

---
 chess/__init__.py | 36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 65719fd5c..a9328a04b 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -412,8 +412,8 @@ def _carry_rippler(mask: Bitboard) -> Iterator[Bitboard]:
             break
 
 def _attack_table(deltas: List[int]) -> Tuple[List[Bitboard], List[Dict[Bitboard, Bitboard]]]:
-    mask_table = []
-    attack_table = []
+    mask_table: List[Bitboard] = []
+    attack_table: List[Dict[Bitboard, Bitboard]] = []
 
     for square in SQUARES:
         attacks = {}
@@ -433,9 +433,9 @@ def _attack_table(deltas: List[int]) -> Tuple[List[Bitboard], List[Dict[Bitboard
 
 
 def _rays() -> List[List[Bitboard]]:
-    rays = []
+    rays: List[List[Bitboard]] = []
     for a, bb_a in enumerate(BB_SQUARES):
-        rays_row = []
+        rays_row: List[Bitboard] = []
         for b, bb_b in enumerate(BB_SQUARES):
             if BB_DIAG_ATTACKS[a][0] & bb_b:
                 rays_row.append((BB_DIAG_ATTACKS[a][0] & BB_DIAG_ATTACKS[b][0]) | bb_a | bb_b)
@@ -961,7 +961,7 @@ def board_fen(self, *, promoted: Optional[bool] = False) -> str:
         Gets the board FEN (e.g.,
         ``rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR``).
         """
-        builder = []
+        builder: List[str] = []
         empty = 0
 
         for square in SQUARES_180:
@@ -1056,7 +1056,7 @@ def piece_map(self, *, mask: Bitboard = BB_ALL) -> Dict[Square, Piece]:
         """
         Gets a dictionary of :class:`pieces ` by square index.
         """
-        result = {}
+        result: Dict[Square, Piece] = {}
         for square in scan_reversed(self.occupied & mask):
             result[square] = typing.cast(Piece, self.piece_at(square))
         return result
@@ -1225,7 +1225,7 @@ def __repr__(self) -> str:
         return f"{type(self).__name__}({self.board_fen()!r})"
 
     def __str__(self) -> str:
-        builder = []
+        builder: List[str] = []
 
         for square in SQUARES_180:
             piece = self.piece_at(square)
@@ -1251,7 +1251,7 @@ def unicode(self, *, invert_color: bool = False, borders: bool = False, empty_sq
         :param invert_color: Invert color of the Unicode pieces.
         :param borders: Show borders and a coordinate margin.
         """
-        builder = []
+        builder: List[str] = []
         for rank_index in (range(7, -1, -1) if orientation else range(8)):
             if borders:
                 builder.append("  ")
@@ -2094,7 +2094,7 @@ def can_claim_threefold_repetition(self) -> bool:
         transpositions.update((transposition_key, ))
 
         # Count positions.
-        switchyard = []
+        switchyard: List[Move] = []
         while self.move_stack:
             move = self.pop()
             switchyard.append(move)
@@ -2147,7 +2147,7 @@ def is_repetition(self, count: int = 3) -> bool:
 
         # Check full replay.
         transposition_key = self._transposition_key()
-        switchyard = []
+        switchyard: List[Move] = []
 
         try:
             while True:
@@ -2343,7 +2343,7 @@ def castling_shredder_fen(self) -> str:
         if not castling_rights:
             return "-"
 
-        builder = []
+        builder: List[str] = []
 
         for square in scan_reversed(castling_rights & BB_RANK_1):
             builder.append(FILE_NAMES[square_file(square)].upper())
@@ -2354,7 +2354,7 @@ def castling_shredder_fen(self) -> str:
         return "".join(builder)
 
     def castling_xfen(self) -> str:
-        builder = []
+        builder: List[str] = []
 
         for color in COLORS:
             king = self.king(color)
@@ -2615,7 +2615,7 @@ def chess960_pos(self, *, ignore_turn: bool = False, ignore_castling: bool = Fal
         return super().chess960_pos()
 
     def _epd_operations(self, operations: Mapping[str, Union[None, str, int, float, Move, Iterable[Move]]]) -> str:
-        epd = []
+        epd: List[str] = []
         first_op = True
 
         for opcode, operand in operations.items():
@@ -2786,7 +2786,7 @@ def _parse_epd_ops(self: BoardT, operation_part: str, make_board: Callable[[], B
 
                     if opcode == "pv":
                         # A variation.
-                        variation = []
+                        variation: List[Move] = []
                         for token in operand.split():
                             move = position.parse_xboard(token)
                             variation.append(move)
@@ -2963,7 +2963,7 @@ def variation_san(self, variation: Iterable[Move]) -> str:
         :raises: :exc:`IllegalMoveError` if any moves in the sequence are illegal.
         """
         board = self.copy(stack=False)
-        san = []
+        san: List[str] = []
 
         for move in variation:
             if not board.is_legal(move):
@@ -3781,7 +3781,7 @@ def __contains__(self, move: Move) -> bool:
         return self.board.is_pseudo_legal(move)
 
     def __repr__(self) -> str:
-        builder = []
+        builder: List[str] = []
 
         for move in self:
             if self.board.is_legal(move):
@@ -3898,7 +3898,7 @@ class SquareSet:
 
     def __init__(self, squares: IntoSquareSet = BB_EMPTY) -> None:
         try:
-            self.mask = squares.__int__() & BB_ALL  # type: ignore
+            self.mask: Bitboard = squares.__int__() & BB_ALL  # type: ignore
             return
         except AttributeError:
             self.mask = 0
@@ -4095,7 +4095,7 @@ def __repr__(self) -> str:
         return f"SquareSet({self.mask:#021_x})"
 
     def __str__(self) -> str:
-        builder = []
+        builder: List[str] = []
 
         for square in SQUARES_180:
             mask = BB_SQUARES[square]

From e57312294bdce09d08714e83f74e274b94f18597 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 1 Oct 2023 22:04:14 +0200
Subject: [PATCH 480/613] Bump actions/checkout to v4

---
 .github/workflows/codeql.yml | 2 +-
 .github/workflows/test.yml   | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index a37e82933..cd5d5a2d8 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -11,7 +11,7 @@ jobs:
       contents: read
       security-events: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: github/codeql-action/init@v2
         with:
           languages: python
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 184092752..637880b51 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,7 +10,7 @@ jobs:
         python-version: ["3.8", "3.9", "3.10", "3.11"]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
@@ -21,7 +21,7 @@ jobs:
   perft:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: "3.11"
@@ -42,7 +42,7 @@ jobs:
         python-version: ["3.9", "3.10", "3.11"]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
@@ -53,7 +53,7 @@ jobs:
   readme:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: "3.11"

From 86f5f55846caaec1c22bc40a2b53d42b06916617 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 1 Oct 2023 22:10:32 +0200
Subject: [PATCH 481/613] Fix map_idx type

---
 chess/syzygy.py | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/chess/syzygy.py b/chess/syzygy.py
index 8953b8e6b..6a0efdef5 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -12,7 +12,7 @@
 import chess
 
 from types import TracebackType
-from typing import Deque, Dict, Iterable, Iterator, List, Optional, Tuple, Type, TypeVar, Union
+from typing import Deque, Dict, Iterable, Iterator, List, Optional, Set, Tuple, Type, TypeVar, Union
 
 
 UINT64_BE = struct.Struct(">Q")
@@ -368,7 +368,7 @@ def is_tablename(name: str, *, one_king: bool = True, piece_count: Optional[int]
 def tablenames(*, one_king: bool = True, piece_count: int = 6) -> Iterator[str]:
     first = "K" if one_king else "P"
 
-    targets = []
+    targets: List[str] = []
 
     white_pieces = piece_count - 2
     black_pieces = 0
@@ -411,7 +411,7 @@ def _dependencies(target: str, *, one_king: bool = True) -> Iterator[str]:
 
 
 def dependencies(target: str, *, one_king: bool = True) -> Iterator[str]:
-    closed = set()
+    closed: Set[str] = set()
     if one_king:
         closed.add("KvK")
 
@@ -422,7 +422,7 @@ def dependencies(target: str, *, one_king: bool = True) -> Iterator[str]:
 
 
 def all_dependencies(targets: Iterable[str], *, one_king: bool = True) -> Iterator[str]:
-    closed = set()
+    closed: Set[str] = set()
     if one_king:
         closed.add("KvK")
 
@@ -684,10 +684,7 @@ def set_norm_piece(self, norm: List[int], pieces: List[int]) -> None:
             i += norm[i]
 
     def calc_factors_piece(self, factor: List[int], order: int, norm: List[int]) -> int:
-        if not self.variant.connected_kings:
-            PIVFAC = [31332, 28056, 462]
-        else:
-            PIVFAC = [31332, 0, 518, 278]
+        PIVFAC = [31332, 0, 518, 278] if self.variant.connected_kings else [31332, 28056, 462]
 
         n = 64 - norm[0]
 
@@ -1310,7 +1307,7 @@ def init_table_dtz(self) -> None:
                     p_data = self._next
                     self.flags.append(self._flags)
 
-                self.map_idx = []
+                self.map_idx: List[List[int]] = []
                 self.p_map = p_data
                 for f in range(files):
                     self.map_idx.append([])

From 1dd3e1e11e637113f42ad29ace841876029d7a81 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 1 Oct 2023 22:19:54 +0200
Subject: [PATCH 482/613] Make also mypy happy

---
 chess/svg.py    | 2 +-
 chess/syzygy.py | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/chess/svg.py b/chess/svg.py
index 3e034ce30..d3d19e89e 100644
--- a/chess/svg.py
+++ b/chess/svg.py
@@ -434,7 +434,7 @@ def board(board: Optional[chess.BaseBoard] = None, *,
                 })
 
         # Render selected squares.
-        if squares is not None and square in squares:
+        if square in squares:
             ET.SubElement(svg, "use", _attrs({
                 "href": "#xx",
                 "xlink:href": "#xx",
diff --git a/chess/syzygy.py b/chess/syzygy.py
index 6a0efdef5..e1fe07eb7 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -1261,7 +1261,7 @@ def init_table_dtz(self) -> None:
             p_data = 5
 
             if not self.has_pawns:
-                self.map_idx = [[0, 0, 0, 0]]
+                self.map_idx: List[List[int]] = [[0, 0, 0, 0]]
 
                 self.setup_pieces_piece_dtz(p_data, 0)
                 p_data += self.num + 1
@@ -1307,7 +1307,7 @@ def init_table_dtz(self) -> None:
                     p_data = self._next
                     self.flags.append(self._flags)
 
-                self.map_idx: List[List[int]] = []
+                self.map_idx = []
                 self.p_map = p_data
                 for f in range(files):
                     self.map_idx.append([])

From 3a99f1bfc76185c81632b00c5a700b3b2a62fd4b Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 8 Oct 2023 17:39:43 +0200
Subject: [PATCH 483/613] Declare chess.popcount in pyright compatible way

---
 chess/__init__.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index a9328a04b..49ec73d9c 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -297,8 +297,12 @@ def scan_reversed(bb: Bitboard) -> Iterator[Square]:
         yield r
         bb ^= BB_SQUARES[r]
 
-# Python 3.10 or fallback.
-popcount: Callable[[Bitboard], int] = getattr(int, "bit_count", lambda bb: bin(bb).count("1"))
+try:
+    # Python 3.10
+    popcount = Bitboard.bit_count
+except AttributeError:
+    def popcount(self: Bitboard) -> int:
+        return bin(self).count("1")
 
 def flip_vertical(bb: Bitboard) -> Bitboard:
     # https://www.chessprogramming.org/Flipping_Mirroring_and_Rotating#FlipVertically

From 99eeeae4d2eed95939f6c52eae9d3418fd1c8a8e Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 8 Oct 2023 19:08:01 +0200
Subject: [PATCH 484/613] Revert "Declare chess.popcount in pyright compatible
 way"

This reverts commit 3a99f1bfc76185c81632b00c5a700b3b2a62fd4b.
---
 chess/__init__.py | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 49ec73d9c..a9328a04b 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -297,12 +297,8 @@ def scan_reversed(bb: Bitboard) -> Iterator[Square]:
         yield r
         bb ^= BB_SQUARES[r]
 
-try:
-    # Python 3.10
-    popcount = Bitboard.bit_count
-except AttributeError:
-    def popcount(self: Bitboard) -> int:
-        return bin(self).count("1")
+# Python 3.10 or fallback.
+popcount: Callable[[Bitboard], int] = getattr(int, "bit_count", lambda bb: bin(bb).count("1"))
 
 def flip_vertical(bb: Bitboard) -> Bitboard:
     # https://www.chessprogramming.org/Flipping_Mirroring_and_Rotating#FlipVertically

From 4a6dd9a89b7810312ab4ea1cf255d1a501ae09ca Mon Sep 17 00:00:00 2001
From: Rahul Saini <137695929+ProgramR4732@users.noreply.github.com>
Date: Fri, 13 Oct 2023 21:24:56 +0530
Subject: [PATCH 485/613] Removed unnecessary indentation blocks and updated
 conditional statements.

---
 release.py | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/release.py b/release.py
index d27ddf04e..f2f7d81fa 100755
--- a/release.py
+++ b/release.py
@@ -10,7 +10,7 @@
 def system(command):
     print(command)
     exit_code = os.system(command)
-    if exit_code != 0:
+    if exit_code:
         sys.exit(exit_code)
 
 
@@ -21,7 +21,7 @@ def check_git():
 
     system("git fetch origin")
     behind = int(subprocess.check_output(["git", "rev-list", "--count", "master..origin/master"]))
-    if behind > 0:
+    if behind:
         print(f"master is {behind} commit(s) behind origin/master")
         sys.exit(1)
 
@@ -65,15 +65,14 @@ def tag_and_push():
             release_txt.write(headline + os.linesep)
 
             for line in changelog_file:
-                if not first_section:
-                    if line.startswith("-------"):
-                        first_section = True
+                if line.startswith("-------") and not first_section:
+                    first_section = True
                 else:
                     if line.startswith("-------"):
                         break
-                    else:
-                        if not prev_line.startswith("------"):
-                            release_txt.write(prev_line)
+
+                    if not prev_line.startswith("------"):
+                        release_txt.write(prev_line)
 
                 prev_line = line
 

From 615a21b4ca7679c51388159324f2a9545868f6f1 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 15 Oct 2023 19:02:54 +0200
Subject: [PATCH 486/613] Link chess-playground

---
 README.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.rst b/README.rst
index ee3b315e7..07e0e3251 100644
--- a/README.rst
+++ b/README.rst
@@ -350,6 +350,7 @@ If you like, share interesting things you are using python-chess for, for exampl
 * Django Rest Framework API for multiplayer chess – https://github.com/WorkShoft/capablanca-api
 * a `browser based PGN viewer `_ written in PyScript – https://github.com/nmstoker/ChessMatchViewer
 * an accessible chessboard that allows blind and visually impaired  players  to play chess against Stockfish – https://github.com/blindpandas/chessmart
+* analyse games to extract various statistics – https://github.com/mvrozanti/chess-playground
 
 
 Prior art

From 2b754a25854b41c68a847c5c36439f2eb1cdffb2 Mon Sep 17 00:00:00 2001
From: anonymousdouble <112695649+anonymousdouble@users.noreply.github.com>
Date: Mon, 1 Jan 2024 21:15:29 +1100
Subject: [PATCH 487/613] Update gaviota.py

refactor with chain constant value assignment to make code more Pythonic, concise and efficient.
---
 chess/gaviota.py | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/chess/gaviota.py b/chess/gaviota.py
index 15371eb19..39173b593 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -144,8 +144,7 @@ def init_flipt() -> List[List[int]]:
 
 
 def init_pp48_idx() -> Tuple[List[List[int]], List[int], List[int]]:
-    MAX_I = 48
-    MAX_J = 48
+    MAX_I = MAX_J = 48
     idx = 0
     pp48_idx = [[-1] * MAX_J for _ in range(MAX_I)]
     pp48_sq_x = [NOSQUARE] * MAX_PP48_INDEX
@@ -170,9 +169,7 @@ def init_pp48_idx() -> Tuple[List[List[int]], List[int], List[int]]:
 
 
 def init_ppp48_idx() -> Tuple[List[List[List[int]]], List[int], List[int], List[int]]:
-    MAX_I = 48
-    MAX_J = 48
-    MAX_K = 48
+    MAX_I = MAX_J = MAX_K = 48
     ppp48_idx = [[[-1] * MAX_I for _ in range(MAX_J)] for _ in range(MAX_K)]
     ppp48_sq_x = [NOSQUARE] * MAX_PPP48_INDEX
     ppp48_sq_y = [NOSQUARE] * MAX_PPP48_INDEX

From a64f78eb42b48a7a1f79a4fb2134c649d4dea4c2 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 1 Jan 2024 12:07:17 +0100
Subject: [PATCH 488/613] Try to test with Ubuntu engine packages in CI

---
 .github/workflows/setup-ubuntu-latest.sh | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/.github/workflows/setup-ubuntu-latest.sh b/.github/workflows/setup-ubuntu-latest.sh
index 8954c8f0c..fae35b61a 100755
--- a/.github/workflows/setup-ubuntu-latest.sh
+++ b/.github/workflows/setup-ubuntu-latest.sh
@@ -1,19 +1,10 @@
 #!/bin/sh -e
 
 # Stockfish
-wget https://files.stockfishchess.org/archive/Stockfish%2011/stockfish-11-linux.zip
-unzip stockfish-11-linux.zip
-mkdir -p bin
-cp stockfish-11-linux/Linux/stockfish_20011801_x64_bmi2 bin/stockfish
-chmod +x bin/stockfish
-echo "`pwd`/bin" >> $GITHUB_PATH
+sudo apt-get install -y stockfish
 
 # Crafty
-git clone https://github.com/lazydroid/crafty-chess --depth 1
-cd crafty-chess
-make unix-gcc
-pwd >> $GITHUB_PATH
-cd ..
+sudo apt-get install -y crafty
 
 # Gaviota libgtb
 git clone https://github.com/michiguel/Gaviota-Tablebases.git --depth 1

From 0082833d30ac98cae1b272e220f56e0797f1187c Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 1 Jan 2024 12:17:41 +0100
Subject: [PATCH 489/613] Try to download Stockfish release in Windows CI

---
 .github/workflows/setup-windows-latest.sh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/setup-windows-latest.sh b/.github/workflows/setup-windows-latest.sh
index 685ead65a..f92bd9059 100755
--- a/.github/workflows/setup-windows-latest.sh
+++ b/.github/workflows/setup-windows-latest.sh
@@ -2,11 +2,11 @@
 
 echo Download ...
 choco install wget
-wget https://files.stockfishchess.org/archive/Stockfish%2011/stockfish-11-win.zip
+wget https://github.com/official-stockfish/Stockfish/releases/download/sf_16/stockfish-windows-x86-64-avx2.zip
 
 echo Unzip ..
-7z e stockfish-11-win.zip stockfish-11-win/Windows/*.exe
+7z e stockfish-windows-x86-64-avx2.zip /stockfish/stockfish-windows-x86-64-avx2.exe
 
 echo Setup path ...
-mv stockfish_20011801_x64_bmi2.exe stockfish.exe
+mv stockfish-windows-x86-64-avx2.exe stockfish.exe
 pwd >> $GITHUB_PATH

From 8a70a2c90f228826f34f9bf2629de86e750ab796 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 1 Jan 2024 12:21:40 +0100
Subject: [PATCH 490/613] Try to fix Stockfish zip extract

---
 .github/workflows/setup-windows-latest.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/setup-windows-latest.sh b/.github/workflows/setup-windows-latest.sh
index f92bd9059..815eb0db2 100755
--- a/.github/workflows/setup-windows-latest.sh
+++ b/.github/workflows/setup-windows-latest.sh
@@ -5,7 +5,7 @@ choco install wget
 wget https://github.com/official-stockfish/Stockfish/releases/download/sf_16/stockfish-windows-x86-64-avx2.zip
 
 echo Unzip ..
-7z e stockfish-windows-x86-64-avx2.zip /stockfish/stockfish-windows-x86-64-avx2.exe
+7z e stockfish-windows-x86-64-avx2.zip stockfish/stockfish-windows-x86-64-avx2.exe
 
 echo Setup path ...
 mv stockfish-windows-x86-64-avx2.exe stockfish.exe

From 2477ae8f4f36ce4ff872383a47ec2cf2e2eb6cf7 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 1 Jan 2024 12:28:48 +0100
Subject: [PATCH 491/613] Fix typing involving PathLike

---
 chess/polyglot.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/chess/polyglot.py b/chess/polyglot.py
index cdf9b0c2f..bf4fa0cd1 100644
--- a/chess/polyglot.py
+++ b/chess/polyglot.py
@@ -11,7 +11,7 @@
 from typing import Callable, Container, Iterator, List, NamedTuple, Optional, Type, Union
 
 
-PathLike = Union[str, bytes, os.PathLike]
+StrOrBytesPath = Union[str, bytes, os.PathLike[str], os.PathLike[bytes]]
 
 
 ENTRY_STRUCT = struct.Struct(">QHHI")
@@ -323,7 +323,7 @@ def _randint(rng: Optional[random.Random], a: int, b: int) -> int:
 class MemoryMappedReader:
     """Maps a Polyglot opening book to memory."""
 
-    def __init__(self, filename: PathLike) -> None:
+    def __init__(self, filename: StrOrBytesPath) -> None:
         fd = os.open(filename, os.O_RDONLY | os.O_BINARY if hasattr(os, "O_BINARY") else os.O_RDONLY)
         try:
             self.mmap: Union[mmap.mmap, _EmptyMmap] = mmap.mmap(fd, 0, access=mmap.ACCESS_READ)
@@ -500,7 +500,7 @@ def close(self) -> None:
         self.mmap.close()
 
 
-def open_reader(path: PathLike) -> MemoryMappedReader:
+def open_reader(path: StrOrBytesPath) -> MemoryMappedReader:
     """
     Creates a reader for the file at the given path.
 

From 62148665fd966c6047e2560bc289763ddca556af Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 1 Jan 2024 12:33:05 +0100
Subject: [PATCH 492/613] Test also with Python 3.12

---
 .github/workflows/test.yml | 8 ++++----
 setup.py                   | 1 +
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 637880b51..576d8b491 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,7 +7,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -24,7 +24,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
-          python-version: "3.11"
+          python-version: "3.12"
       - run: pip install -e .
       - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000
       - run: python examples/perft/perft.py -t 1 examples/perft/chess960.perft --max-nodes 100000
@@ -39,7 +39,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -56,7 +56,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
-          python-version: "3.11"
+          python-version: "3.12"
       - run: sudo apt-get update && sudo apt-get install -y docutils-common
       - run: python setup.py --long-description | rst2html --strict --no-raw > /dev/null
       - run: pip install -e .
diff --git a/setup.py b/setup.py
index 8c397e456..b825adb44 100755
--- a/setup.py
+++ b/setup.py
@@ -82,6 +82,7 @@ def read_description():
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "Topic :: Games/Entertainment :: Board Games",
         "Topic :: Games/Entertainment :: Turn Based Strategy",
         "Topic :: Software Development :: Libraries :: Python Modules",

From 0946d784bfead47bfba88ca185b2ed626fd31bbd Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 1 Jan 2024 12:34:51 +0100
Subject: [PATCH 493/613] Work around PathLike not subscriptable on Python 3.8

---
 chess/polyglot.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/polyglot.py b/chess/polyglot.py
index bf4fa0cd1..44a68caa5 100644
--- a/chess/polyglot.py
+++ b/chess/polyglot.py
@@ -11,7 +11,7 @@
 from typing import Callable, Container, Iterator, List, NamedTuple, Optional, Type, Union
 
 
-StrOrBytesPath = Union[str, bytes, os.PathLike[str], os.PathLike[bytes]]
+StrOrBytesPath = Union[str, bytes, "os.PathLike[str]", "os.PathLike[bytes]"]
 
 
 ENTRY_STRUCT = struct.Struct(">QHHI")

From c5c388292c7986405ebbe4813b1691299bf3e900 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 1 Jan 2024 12:37:49 +0100
Subject: [PATCH 494/613] Bump version requirement and copyright year

---
 README.rst   | 2 +-
 docs/conf.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.rst b/README.rst
index 07e0e3251..7a677a451 100644
--- a/README.rst
+++ b/README.rst
@@ -59,7 +59,7 @@ python-chess:
 Installing
 ----------
 
-Requires Python 3.7+. Download and install the latest release:
+Requires Python 3.8+. Download and install the latest release:
 
 ::
 
diff --git a/docs/conf.py b/docs/conf.py
index a6e8a79d9..98e926efa 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -34,7 +34,7 @@
 
 # General information about the project.
 project = "python-chess"
-copyright = "2014–2023, Niklas Fiekas"
+copyright = "2014–2024, Niklas Fiekas"
 
 # The version.
 version = chess.__version__

From cd7f5958289dd08156436a1f84b9ea03cb1f75a1 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 1 Jan 2024 14:48:01 +0100
Subject: [PATCH 495/613] Update to CodeQL 3

---
 .github/workflows/codeql.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index cd5d5a2d8..bc991c885 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -12,7 +12,7 @@ jobs:
       security-events: write
     steps:
       - uses: actions/checkout@v4
-      - uses: github/codeql-action/init@v2
+      - uses: github/codeql-action/init@v3
         with:
           languages: python
-      - uses: github/codeql-action/analyze@v2
+      - uses: github/codeql-action/analyze@v3

From 65f6d7d7a2229be1c6c9051182d299404b0186d5 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 21 Feb 2024 03:23:07 -0800
Subject: [PATCH 496/613] Add support for multiple comments per move

---
 chess/pgn.py | 108 +++++++++++++++++++++++++++++----------------------
 test.py      |  58 +++++++++++++--------------
 2 files changed, 91 insertions(+), 75 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 55eddbc29..65ef0e6d5 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -197,24 +197,24 @@ class GameNode(abc.ABC):
     variations: List[ChildNode]
     """A list of child nodes."""
 
-    comment: str
+    comments: list[str]
     """
-    A comment that goes behind the move leading to this node. Comments
+    Comments that go behind the move leading to this node. Comments
     that occur before any moves are assigned to the root node.
     """
 
-    starting_comment: str
+    starting_comments: list[str]
     nags: Set[int]
 
-    def __init__(self, *, comment: str = "") -> None:
+    def __init__(self, *, comment: Union[str, list[str]] = "") -> None:
         self.parent = None
         self.move = None
         self.variations = []
-        self.comment = comment
+        self.comment = comment if isinstance(comment, list) else [comment] if comment else []
 
         # Deprecated: These should be properties of ChildNode, but need to
         # remain here for backwards compatibility.
-        self.starting_comment = ""
+        self.starting_comment: list[str] = []
         self.nags = set()
 
     @abc.abstractmethod
@@ -386,7 +386,7 @@ def remove_variation(self, move: Union[int, chess.Move, GameNode]) -> None:
         """Removes a variation."""
         self.variations.remove(self.variation(move))
 
-    def add_variation(self, move: chess.Move, *, comment: str = "", starting_comment: str = "", nags: Iterable[int] = []) -> ChildNode:
+    def add_variation(self, move: chess.Move, *, comment: Union[str, list[str]] = "", starting_comment: Union[str, list[str]] = "", nags: Iterable[int] = []) -> ChildNode:
         """Creates a child node with the given attributes."""
         # Instanciate ChildNode only in this method.
         return ChildNode(self, move, comment=comment, starting_comment=starting_comment, nags=nags)
@@ -417,7 +417,7 @@ def mainline_moves(self) -> Mainline[chess.Move]:
         """Returns an iterable over the main moves after this node."""
         return Mainline(self, lambda node: node.move)
 
-    def add_line(self, moves: Iterable[chess.Move], *, comment: str = "", starting_comment: str = "", nags: Iterable[int] = []) -> GameNode:
+    def add_line(self, moves: Iterable[chess.Move], *, comment: Union[str, list[str]] = "", starting_comment: Union[str, list[str]] = "", nags: Iterable[int] = []) -> GameNode:
         """
         Creates a sequence of child nodes for the given list of moves.
         Adds *comment* and *nags* to the last node of the line and returns it.
@@ -431,9 +431,12 @@ def add_line(self, moves: Iterable[chess.Move], *, comment: str = "", starting_c
 
         # Merge comment and NAGs.
         if node.comment:
-            node.comment += " " + comment
+            if isinstance(comment, str):
+                node.comment.append(comment)
+            else:
+                node.comment.extend(comment)
         else:
-            node.comment = comment
+            node.comment = comment if isinstance(comment, list) else [comment] if comment else []
 
         node.nags.update(nags)
 
@@ -446,7 +449,7 @@ def eval(self) -> Optional[chess.engine.PovScore]:
 
         Complexity is `O(n)`.
         """
-        match = EVAL_REGEX.search(self.comment)
+        match = EVAL_REGEX.search(" ".join(self.comment))
         if not match:
             return None
 
@@ -472,7 +475,7 @@ def eval_depth(self) -> Optional[int]:
 
         Complexity is `O(1)`.
         """
-        match = EVAL_REGEX.search(self.comment)
+        match = EVAL_REGEX.search(" ".join(self.comment))
         return int(match.group("depth")) if match and match.group("depth") else None
 
     def set_eval(self, score: Optional[chess.engine.PovScore], depth: Optional[int] = None) -> None:
@@ -489,12 +492,16 @@ def set_eval(self, score: Optional[chess.engine.PovScore], depth: Optional[int]
             elif score.white().mate():
                 eval = f"[%eval #{score.white().mate()}{depth_suffix}]"
 
-        self.comment, found = EVAL_REGEX.subn(_condense_affix(eval), self.comment, count=1)
+        found = 0
+        for index in range(len(self.comment)):
+            self.comment[index], found = EVAL_REGEX.subn(_condense_affix(eval), self.comment[index], count=1)
+            if found:
+                break
+
+        self.comment = list(filter(None, self.comment))
 
         if not found and eval:
-            if self.comment and not self.comment.endswith(" "):
-                self.comment += " "
-            self.comment += eval
+            self.comment.append(eval)
 
     def arrows(self) -> List[chess.svg.Arrow]:
         """
@@ -504,7 +511,7 @@ def arrows(self) -> List[chess.svg.Arrow]:
         Returns a list of :class:`arrows `.
         """
         arrows = []
-        for match in ARROWS_REGEX.finditer(self.comment):
+        for match in ARROWS_REGEX.finditer(" ".join(self.comment)):
             for group in match.group("arrows").split(","):
                 arrows.append(chess.svg.Arrow.from_pgn(group))
 
@@ -526,7 +533,10 @@ def set_arrows(self, arrows: Iterable[Union[chess.svg.Arrow, Tuple[Square, Squar
                 pass
             (csl if arrow.tail == arrow.head else cal).append(arrow.pgn())  # type: ignore
 
-        self.comment = ARROWS_REGEX.sub(_condense_affix(""), self.comment)
+        for index in range(len(self.comment)):
+            self.comment[index] = ARROWS_REGEX.sub(_condense_affix(""), self.comment[index])
+
+        self.comment = list(filter(None, self.comment))
 
         prefix = ""
         if csl:
@@ -534,10 +544,8 @@ def set_arrows(self, arrows: Iterable[Union[chess.svg.Arrow, Tuple[Square, Squar
         if cal:
             prefix += f"[%cal {','.join(cal)}]"
 
-        if prefix and self.comment and not self.comment.startswith(" ") and not self.comment.startswith("\n"):
-            self.comment = prefix + " " + self.comment
-        else:
-            self.comment = prefix + self.comment
+        if prefix:
+            self.comment.insert(0, prefix)
 
     def clock(self) -> Optional[float]:
         """
@@ -547,7 +555,7 @@ def clock(self) -> Optional[float]:
         Returns the player's remaining time to the next time control after this
         move, in seconds.
         """
-        match = CLOCK_REGEX.search(self.comment)
+        match = CLOCK_REGEX.search(" ".join(self.comment))
         if match is None:
             return None
         return int(match.group("hours")) * 3600 + int(match.group("minutes")) * 60 + float(match.group("seconds"))
@@ -566,12 +574,16 @@ def set_clock(self, seconds: Optional[float]) -> None:
             seconds_part = f"{seconds:06.3f}".rstrip("0").rstrip(".")
             clk = f"[%clk {hours:d}:{minutes:02d}:{seconds_part}]"
 
-        self.comment, found = CLOCK_REGEX.subn(_condense_affix(clk), self.comment, count=1)
+        found = 0
+        for index in range(len(self.comment)):
+            self.comment[index], found = CLOCK_REGEX.subn(_condense_affix(clk), self.comment[index], count=1)
+            if found:
+                break
+
+        self.comment = list(filter(None, self.comment))
 
         if not found and clk:
-            if self.comment and not self.comment.endswith(" ") and not self.comment.endswith("\n"):
-                self.comment += " "
-            self.comment += clk
+            self.comment.append(clk)
 
     def emt(self) -> Optional[float]:
         """
@@ -581,7 +593,7 @@ def emt(self) -> Optional[float]:
         Returns the player's elapsed move time use for the comment of this
         move, in seconds.
         """
-        match = EMT_REGEX.search(self.comment)
+        match = EMT_REGEX.search(" ".join(self.comment))
         if match is None:
             return None
         return int(match.group("hours")) * 3600 + int(match.group("minutes")) * 60 + float(match.group("seconds"))
@@ -600,12 +612,16 @@ def set_emt(self, seconds: Optional[float]) -> None:
             seconds_part = f"{seconds:06.3f}".rstrip("0").rstrip(".")
             emt = f"[%emt {hours:d}:{minutes:02d}:{seconds_part}]"
 
-        self.comment, found = EMT_REGEX.subn(_condense_affix(emt), self.comment, count=1)
+        found = 0
+        for index in range(len(self.comment)):
+            self.comment[index], found = EMT_REGEX.subn(_condense_affix(emt), self.comment[index], count=1)
+            if found:
+                break
+
+        self.comment = list(filter(None, self.comment))
 
         if not found and emt:
-            if self.comment and not self.comment.endswith(" ") and not self.comment.endswith("\n"):
-                self.comment += " "
-            self.comment += emt
+            self.comment.append(emt)
 
     @abc.abstractmethod
     def accept(self, visitor: BaseVisitor[ResultT]) -> ResultT:
@@ -661,7 +677,7 @@ class ChildNode(GameNode):
     move: chess.Move
     """The move leading to this node."""
 
-    starting_comment: str
+    starting_comment: list[str]
     """
     A comment for the start of a variation. Only nodes that
     actually start a variation (:func:`~chess.pgn.GameNode.starts_variation()`
@@ -675,14 +691,14 @@ class ChildNode(GameNode):
     node of the game will never have NAGs.
     """
 
-    def __init__(self, parent: GameNode, move: chess.Move, *, comment: str = "", starting_comment: str = "", nags: Iterable[int] = []) -> None:
+    def __init__(self, parent: GameNode, move: chess.Move, *, comment: Union[str, list[str]] = "", starting_comment: Union[str, list[str]] = "", nags: Iterable[int] = []) -> None:
         super().__init__(comment=comment)
         self.parent = parent
         self.move = move
         self.parent.variations.append(self)
 
         self.nags.update(nags)
-        self.starting_comment = starting_comment
+        self.starting_comment = starting_comment if isinstance(starting_comment, list) else [starting_comment] if starting_comment else []
 
     def board(self) -> chess.Board:
         stack: List[chess.Move] = []
@@ -1134,7 +1150,7 @@ def visit_board(self, board: chess.Board) -> None:
         """
         pass
 
-    def visit_comment(self, comment: str) -> None:
+    def visit_comment(self, comment: list[str]) -> None:
         """Called for each comment."""
         pass
 
@@ -1188,7 +1204,7 @@ def begin_game(self) -> None:
         self.game: GameT = self.Game()
 
         self.variation_stack: List[GameNode] = [self.game]
-        self.starting_comment = ""
+        self.starting_comment: list[str] = []
         self.in_variation = False
 
     def begin_headers(self) -> Headers:
@@ -1213,22 +1229,22 @@ def visit_result(self, result: str) -> None:
         if self.game.headers.get("Result", "*") == "*":
             self.game.headers["Result"] = result
 
-    def visit_comment(self, comment: str) -> None:
+    def visit_comment(self, comment: list[str]) -> None:
         if self.in_variation or (self.variation_stack[-1].parent is None and self.variation_stack[-1].is_end()):
             # Add as a comment for the current node if in the middle of
             # a variation. Add as a comment for the game if the comment
             # starts before any move.
-            new_comment = [self.variation_stack[-1].comment, comment]
-            self.variation_stack[-1].comment = " ".join(filter(None, new_comment))
+            new_comment = self.variation_stack[-1].comment + comment
+            self.variation_stack[-1].comment = list(filter(None, new_comment))
         else:
             # Otherwise, it is a starting comment.
-            new_comment = [self.starting_comment, comment]
-            self.starting_comment = " ".join(filter(None, new_comment))
+            new_comment = self.starting_comment + comment
+            self.starting_comment = list(filter(None, new_comment))
 
     def visit_move(self, board: chess.Board, move: chess.Move) -> None:
         self.variation_stack[-1] = self.variation_stack[-1].add_variation(move)
         self.variation_stack[-1].starting_comment = self.starting_comment
-        self.starting_comment = ""
+        self.starting_comment = []
         self.in_variation = True
 
     def handle_error(self, error: Exception) -> None:
@@ -1396,9 +1412,9 @@ def end_variation(self) -> None:
             self.write_token(") ")
             self.force_movenumber = True
 
-    def visit_comment(self, comment: str) -> None:
+    def visit_comment(self, comment: list[str]) -> None:
         if self.comments and (self.variations or not self.variation_depth):
-            self.write_token("{ " + comment.replace("}", "").strip() + " } ")
+            self.write_token(" ".join("{ " + single_comment.replace("}", "").strip() + " }" for single_comment in comment) + " ")
             self.force_movenumber = True
 
     def visit_nag(self, nag: int) -> None:
@@ -1693,7 +1709,7 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any:
                     line = line[close_index + 1:]
 
                 if not skip_variation_depth:
-                    visitor.visit_comment("".join(comment_lines))
+                    visitor.visit_comment(["".join(comment_lines)])
 
                 # Continue with the current line.
                 fresh_line = False
diff --git a/test.py b/test.py
index e1d0d50c5..d3961cc6b 100755
--- a/test.py
+++ b/test.py
@@ -2078,29 +2078,29 @@ class PgnTestCase(unittest.TestCase):
 
     def test_exporter(self):
         game = chess.pgn.Game()
-        game.comment = "Test game:"
+        game.comment = ["Test game:"]
         game.headers["Result"] = "*"
         game.headers["VeryLongHeader"] = "This is a very long header, much wider than the 80 columns that PGNs are formatted with by default"
 
         e4 = game.add_variation(game.board().parse_san("e4"))
-        e4.comment = "Scandinavian Defense:"
+        e4.comment = ["Scandinavian Defense:"]
 
         e4_d5 = e4.add_variation(e4.board().parse_san("d5"))
 
         e4_h5 = e4.add_variation(e4.board().parse_san("h5"))
         e4_h5.nags.add(chess.pgn.NAG_MISTAKE)
-        e4_h5.starting_comment = "This"
-        e4_h5.comment = "is nonsense"
+        e4_h5.starting_comment = ["This"]
+        e4_h5.comment = ["is nonsense"]
 
         e4_e5 = e4.add_variation(e4.board().parse_san("e5"))
         e4_e5_Qf3 = e4_e5.add_variation(e4_e5.board().parse_san("Qf3"))
         e4_e5_Qf3.nags.add(chess.pgn.NAG_MISTAKE)
 
         e4_c5 = e4.add_variation(e4.board().parse_san("c5"))
-        e4_c5.comment = "Sicilian"
+        e4_c5.comment = ["Sicilian"]
 
         e4_d5_exd5 = e4_d5.add_main_variation(e4_d5.board().parse_san("exd5"))
-        e4_d5_exd5.comment = "Best"
+        e4_d5_exd5.comment = ["Best"]
 
         # Test string exporter with various options.
         exporter = chess.pgn.StringExporter(headers=False, comments=False, variations=False)
@@ -2229,7 +2229,7 @@ def test_comment_at_eol(self):
 
         # Make sure the comment for the second variation is there.
         self.assertIn(5, node[1].nags)
-        self.assertEqual(node[1].comment, "\n/\\ Ne7, c6")
+        self.assertEqual(node[1].comment, ["\n/\\ Ne7, c6"])
 
     def test_promotion_without_equals(self):
         # Example game from https://github.com/rozim/ChessData as originally
@@ -2317,12 +2317,12 @@ def test_variation_stack(self):
     def test_game_starting_comment(self):
         pgn = io.StringIO("{ Game starting comment } 1. d3")
         game = chess.pgn.read_game(pgn)
-        self.assertEqual(game.comment, "Game starting comment")
+        self.assertEqual(game.comment, ["Game starting comment"])
         self.assertEqual(game[0].san(), "d3")
 
         pgn = io.StringIO("{ Empty game, but has a comment }")
         game = chess.pgn.read_game(pgn)
-        self.assertEqual(game.comment, "Empty game, but has a comment")
+        self.assertEqual(game.comment, ["Empty game, but has a comment"])
 
     def test_game_starting_variation(self):
         pgn = io.StringIO(textwrap.dedent("""\
@@ -2330,7 +2330,7 @@ def test_game_starting_variation(self):
             """))
 
         game = chess.pgn.read_game(pgn)
-        self.assertEqual(game.comment, "Start of game")
+        self.assertEqual(game.comment, ["Start of game"])
 
         node = game[0]
         self.assertEqual(node.move, chess.Move.from_uci("e2e4"))
@@ -2340,7 +2340,7 @@ def test_game_starting_variation(self):
         node = game[1]
         self.assertEqual(node.move, chess.Move.from_uci("d2d4"))
         self.assertFalse(node.comment)
-        self.assertEqual(node.starting_comment, "Start of variation")
+        self.assertEqual(node.starting_comment, ["Start of variation"])
 
     def test_annotation_symbols(self):
         pgn = io.StringIO("1. b4?! g6 2. Bb2 Nc6? 3. Bxh8!!")
@@ -2685,12 +2685,12 @@ def test_add_line(self):
         tail = game.add_line(moves, starting_comment="start", comment="end", nags=(17, 42))
 
         self.assertEqual(tail.parent.move, chess.Move.from_uci("g1f3"))
-        self.assertEqual(tail.parent.starting_comment, "start")
-        self.assertEqual(tail.parent.comment, "")
+        self.assertEqual(tail.parent.starting_comment, ["start"])
+        self.assertEqual(tail.parent.comment, [])
         self.assertEqual(len(tail.parent.nags), 0)
 
         self.assertEqual(tail.move, chess.Move.from_uci("d7d5"))
-        self.assertEqual(tail.comment, "end")
+        self.assertEqual(tail.comment, ["end"])
         self.assertIn(42, tail.nags)
 
     def test_mainline(self):
@@ -2820,27 +2820,27 @@ def test_recursion(self):
 
     def test_annotations(self):
         game = chess.pgn.Game()
-        game.comment = "foo [%bar] baz"
+        game.comment = ["foo [%bar] baz"]
 
         self.assertTrue(game.clock() is None)
         clock = 12345
         game.set_clock(clock)
-        self.assertEqual(game.comment, "foo [%bar] baz [%clk 3:25:45]")
+        self.assertEqual(game.comment, ["foo [%bar] baz", "[%clk 3:25:45]"])
         self.assertEqual(game.clock(), clock)
 
         self.assertTrue(game.eval() is None)
         game.set_eval(chess.engine.PovScore(chess.engine.Cp(-80), chess.WHITE))
-        self.assertEqual(game.comment, "foo [%bar] baz [%clk 3:25:45] [%eval -0.80]")
+        self.assertEqual(game.comment, ["foo [%bar] baz", "[%clk 3:25:45]", "[%eval -0.80]"])
         self.assertEqual(game.eval().white().score(), -80)
         self.assertEqual(game.eval_depth(), None)
         game.set_eval(chess.engine.PovScore(chess.engine.Mate(1), chess.WHITE), 5)
-        self.assertEqual(game.comment, "foo [%bar] baz [%clk 3:25:45] [%eval #1,5]")
+        self.assertEqual(game.comment, ["foo [%bar] baz", "[%clk 3:25:45]", "[%eval #1,5]"])
         self.assertEqual(game.eval().white().mate(), 1)
         self.assertEqual(game.eval_depth(), 5)
 
         self.assertEqual(game.arrows(), [])
         game.set_arrows([(chess.A1, chess.A1), chess.svg.Arrow(chess.A1, chess.H1, color="red"), chess.svg.Arrow(chess.B1, chess.B8)])
-        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%eval #1,5]")
+        self.assertEqual(game.comment, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]", "[%eval #1,5]"])
         arrows = game.arrows()
         self.assertEqual(len(arrows), 3)
         self.assertEqual(arrows[0].color, "green")
@@ -2850,18 +2850,18 @@ def test_annotations(self):
         self.assertTrue(game.emt() is None)
         emt = 321
         game.set_emt(emt)
-        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%eval #1,5] [%emt 0:05:21]")
+        self.assertEqual(game.comment, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]", "[%eval #1,5]", "[%emt 0:05:21]"])
         self.assertEqual(game.emt(), emt)
 
         game.set_eval(None)
-        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%emt 0:05:21]")
+        self.assertEqual(game.comment, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]", "[%emt 0:05:21]"])
 
         game.set_emt(None)
-        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45]")
+        self.assertEqual(game.comment, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]"])
 
         game.set_clock(None)
         game.set_arrows([])
-        self.assertEqual(game.comment, "foo [%bar] baz")
+        self.assertEqual(game.comment, ["foo [%bar] baz"])
 
     def test_eval(self):
         game = chess.pgn.Game()
@@ -2871,28 +2871,28 @@ def test_eval(self):
 
     def test_float_emt(self):
         game = chess.pgn.Game()
-        game.comment = "[%emt 0:00:01.234]"
+        game.comment = ["[%emt 0:00:01.234]"]
         self.assertEqual(game.emt(), 1.234)
 
         game.set_emt(6.54321)
-        self.assertEqual(game.comment, "[%emt 0:00:06.543]")
+        self.assertEqual(game.comment, ["[%emt 0:00:06.543]"])
         self.assertEqual(game.emt(), 6.543)
 
         game.set_emt(-70)
-        self.assertEqual(game.comment, "[%emt 0:00:00]")  # Clamped
+        self.assertEqual(game.comment, ["[%emt 0:00:00]"])  # Clamped
         self.assertEqual(game.emt(), 0)
 
     def test_float_clk(self):
         game = chess.pgn.Game()
-        game.comment = "[%clk 0:00:01.234]"
+        game.comment = ["[%clk 0:00:01.234]"]
         self.assertEqual(game.clock(), 1.234)
 
         game.set_clock(6.54321)
-        self.assertEqual(game.comment, "[%clk 0:00:06.543]")
+        self.assertEqual(game.comment, ["[%clk 0:00:06.543]"])
         self.assertEqual(game.clock(), 6.543)
 
         game.set_clock(-70)
-        self.assertEqual(game.comment, "[%clk 0:00:00]")  # Clamped
+        self.assertEqual(game.comment, ["[%clk 0:00:00]"])  # Clamped
         self.assertEqual(game.clock(), 0)
 
     def test_node_turn(self):

From 2269d6a05e137dfe42043474fdaca58c2c6b84a3 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 21 Feb 2024 03:25:33 -0800
Subject: [PATCH 497/613] Add test for exporting a move with multiple comments

---
 test.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test.py b/test.py
index d3961cc6b..2008ef49d 100755
--- a/test.py
+++ b/test.py
@@ -2100,7 +2100,7 @@ def test_exporter(self):
         e4_c5.comment = ["Sicilian"]
 
         e4_d5_exd5 = e4_d5.add_main_variation(e4_d5.board().parse_san("exd5"))
-        e4_d5_exd5.comment = ["Best"]
+        e4_d5_exd5.comment = ["Best", "and the end of this example"]
 
         # Test string exporter with various options.
         exporter = chess.pgn.StringExporter(headers=False, comments=False, variations=False)
@@ -2125,7 +2125,7 @@ def test_exporter(self):
 
             { Test game: } 1. e4 { Scandinavian Defense: } 1... d5 ( { This } 1... h5 $2
             { is nonsense } ) ( 1... e5 2. Qf3 $2 ) ( 1... c5 { Sicilian } ) 2. exd5
-            { Best } *""")
+            { Best } { and the end of this example } *""")
         self.assertEqual(str(exporter), pgn)
 
         # Test file exporter.

From 05da5981c5494b1c87b214a0fd46dfc4b0f6ac5a Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 21 Feb 2024 03:48:21 -0800
Subject: [PATCH 498/613] Undo member renaming

---
 chess/pgn.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 65ef0e6d5..f13812bae 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -197,13 +197,13 @@ class GameNode(abc.ABC):
     variations: List[ChildNode]
     """A list of child nodes."""
 
-    comments: list[str]
+    comment: list[str]
     """
     Comments that go behind the move leading to this node. Comments
     that occur before any moves are assigned to the root node.
     """
 
-    starting_comments: list[str]
+    starting_comment: list[str]
     nags: Set[int]
 
     def __init__(self, *, comment: Union[str, list[str]] = "") -> None:

From c06030895cbcf49251279724bd19669c6f580349 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 21 Feb 2024 03:48:45 -0800
Subject: [PATCH 499/613] Add test for reading game with mulit-comment moves

---
 test.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/test.py b/test.py
index 2008ef49d..c912948c4 100755
--- a/test.py
+++ b/test.py
@@ -2215,6 +2215,14 @@ def test_read_game(self):
         self.assertEqual(sixth_game.headers["White"], "Deep Blue (Computer)")
         self.assertEqual(sixth_game.headers["Result"], "1-0")
 
+    def test_read_game_with_multicomment_move(self):
+        pgn = io.StringIO("1. e4 {A common opening} 1... e5 {A common response} {An uncommon comment}")
+        game = chess.pgn.read_game(pgn)
+        first_move = game.variation(0)
+        self.assertEqual(first_move.comment, ["A common opening"])
+        second_move = first_move.variation(0)
+        self.assertEqual(second_move.comment, ["A common response", "An uncommon comment"])
+
     def test_comment_at_eol(self):
         pgn = io.StringIO(textwrap.dedent("""\
             1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. Nbd2 a6 $6 (6... Bb6 $5 {

From 8d076cb77600d84f692e19f70abfdf9d04b93498 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 22 Feb 2024 03:43:33 -0800
Subject: [PATCH 500/613] Undo comment change

---
 chess/pgn.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index f13812bae..513698dff 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -199,7 +199,7 @@ class GameNode(abc.ABC):
 
     comment: list[str]
     """
-    Comments that go behind the move leading to this node. Comments
+    A comment that goes behind the move leading to this node. Comments
     that occur before any moves are assigned to the root node.
     """
 

From 1df1b76fb064765b7e7510fbe6b35c1b27c3dde0 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 22 Feb 2024 03:55:05 -0800
Subject: [PATCH 501/613] Create class to hold multiple comments

---
 chess/pgn.py | 116 ++++++++++++++++++++++++++++++++++++++++-----------
 test.py      |  18 ++++----
 2 files changed, 100 insertions(+), 34 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 513698dff..763b90f02 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -184,6 +184,70 @@ def __init__(self, node: ChildNode, *, is_variation: bool = False, sidelines: bo
         self.in_variation = False
 
 
+class GameNodeComment:
+    """
+    PGN Comment Storage
+
+    A class that can hold one or more comments for a GameNode.
+    """
+    def __init__(self, comment: Union[str, list[str]] = ""):
+        self.set(comment)
+
+    def set(self, new_comment: Union[str, list[str]]):
+        """Replace the comment with a new comment or a list of comments."""
+        self._comments = new_comment if isinstance(new_comment, list) else [new_comment] if new_comment else []
+
+    def pgn_format(self) -> str:
+        """Create a string representation of the comments in PGN format."""
+        comments = list(map(lambda s: s.replace("{", ""), self._comments))
+        comments = list(map(lambda s: s.replace("}", "").strip(), comments))
+        output_comments = GameNodeComment(comments)
+        output_comments.remove_empty()
+        return "{ " + output_comments.join(" } { ") + " }"
+
+    def remove_empty(self) -> None:
+        """Remove empty comments from the comment list."""
+        self._comments = list(filter(None, self._comments))
+
+    def append(self, new_comment: str) -> None:
+        """Append a new comment to the end of the comment list."""
+        self._comments.append(new_comment)
+
+    def extend(self, new_comments: list[str]) -> None:
+        """Append several new comments to the end of the comment list."""
+        self._comments.extend(new_comments)
+
+    def insert(self, index: int, new_comment: str) -> None:
+        """Insert a new comment before the specified index."""
+        self._comments.insert(index, new_comment)
+
+    def join(self, joiner: str) -> str:
+        """Join all of the comments together with a joiner string between each."""
+        return joiner.join(self._comments)
+
+    def __len__(self) -> int:
+        return len(self._comments)
+
+    def __getitem__(self, index: int) -> str:
+        return self._comments[index]
+
+    def __setitem__(self, index: int, new_comment: str) -> None:
+        self._comments[index] = new_comment
+
+    def __add__(self, other: GameNodeComment) -> GameNodeComment:
+        return GameNodeComment(self._comments + other._comments)
+
+    def __eq__(self, other: object) -> bool:
+        if isinstance(other, str):
+            return len(self) == 1 and self[0] == other
+        elif isinstance(other, list):
+            return self._comments == other
+        elif isinstance(other, GameNodeComment):
+            return self._comments == other._comments
+        else:
+            return False
+
+
 class GameNode(abc.ABC):
     parent: Optional[GameNode]
     """The parent node or ``None`` if this is the root node of the game."""
@@ -197,24 +261,24 @@ class GameNode(abc.ABC):
     variations: List[ChildNode]
     """A list of child nodes."""
 
-    comment: list[str]
+    comment: GameNodeComment
     """
     A comment that goes behind the move leading to this node. Comments
     that occur before any moves are assigned to the root node.
     """
 
-    starting_comment: list[str]
+    starting_comment: GameNodeComment
     nags: Set[int]
 
     def __init__(self, *, comment: Union[str, list[str]] = "") -> None:
         self.parent = None
         self.move = None
         self.variations = []
-        self.comment = comment if isinstance(comment, list) else [comment] if comment else []
+        self.comment = GameNodeComment(comment)
 
         # Deprecated: These should be properties of ChildNode, but need to
         # remain here for backwards compatibility.
-        self.starting_comment: list[str] = []
+        self.starting_comment = GameNodeComment()
         self.nags = set()
 
     @abc.abstractmethod
@@ -436,7 +500,7 @@ def add_line(self, moves: Iterable[chess.Move], *, comment: Union[str, list[str]
             else:
                 node.comment.extend(comment)
         else:
-            node.comment = comment if isinstance(comment, list) else [comment] if comment else []
+            node.comment.set(comment)
 
         node.nags.update(nags)
 
@@ -449,7 +513,7 @@ def eval(self) -> Optional[chess.engine.PovScore]:
 
         Complexity is `O(n)`.
         """
-        match = EVAL_REGEX.search(" ".join(self.comment))
+        match = EVAL_REGEX.search(self.comment.join(" "))
         if not match:
             return None
 
@@ -475,7 +539,7 @@ def eval_depth(self) -> Optional[int]:
 
         Complexity is `O(1)`.
         """
-        match = EVAL_REGEX.search(" ".join(self.comment))
+        match = EVAL_REGEX.search(self.comment.join(" "))
         return int(match.group("depth")) if match and match.group("depth") else None
 
     def set_eval(self, score: Optional[chess.engine.PovScore], depth: Optional[int] = None) -> None:
@@ -498,7 +562,7 @@ def set_eval(self, score: Optional[chess.engine.PovScore], depth: Optional[int]
             if found:
                 break
 
-        self.comment = list(filter(None, self.comment))
+        self.comment.remove_empty()
 
         if not found and eval:
             self.comment.append(eval)
@@ -511,7 +575,7 @@ def arrows(self) -> List[chess.svg.Arrow]:
         Returns a list of :class:`arrows `.
         """
         arrows = []
-        for match in ARROWS_REGEX.finditer(" ".join(self.comment)):
+        for match in ARROWS_REGEX.finditer(self.comment.join(" ")):
             for group in match.group("arrows").split(","):
                 arrows.append(chess.svg.Arrow.from_pgn(group))
 
@@ -536,7 +600,7 @@ def set_arrows(self, arrows: Iterable[Union[chess.svg.Arrow, Tuple[Square, Squar
         for index in range(len(self.comment)):
             self.comment[index] = ARROWS_REGEX.sub(_condense_affix(""), self.comment[index])
 
-        self.comment = list(filter(None, self.comment))
+        self.comment.remove_empty()
 
         prefix = ""
         if csl:
@@ -555,7 +619,7 @@ def clock(self) -> Optional[float]:
         Returns the player's remaining time to the next time control after this
         move, in seconds.
         """
-        match = CLOCK_REGEX.search(" ".join(self.comment))
+        match = CLOCK_REGEX.search(self.comment.join(" "))
         if match is None:
             return None
         return int(match.group("hours")) * 3600 + int(match.group("minutes")) * 60 + float(match.group("seconds"))
@@ -580,7 +644,7 @@ def set_clock(self, seconds: Optional[float]) -> None:
             if found:
                 break
 
-        self.comment = list(filter(None, self.comment))
+        self.comment.remove_empty()
 
         if not found and clk:
             self.comment.append(clk)
@@ -593,7 +657,7 @@ def emt(self) -> Optional[float]:
         Returns the player's elapsed move time use for the comment of this
         move, in seconds.
         """
-        match = EMT_REGEX.search(" ".join(self.comment))
+        match = EMT_REGEX.search(self.comment.join(" "))
         if match is None:
             return None
         return int(match.group("hours")) * 3600 + int(match.group("minutes")) * 60 + float(match.group("seconds"))
@@ -618,7 +682,7 @@ def set_emt(self, seconds: Optional[float]) -> None:
             if found:
                 break
 
-        self.comment = list(filter(None, self.comment))
+        self.comment.remove_empty()
 
         if not found and emt:
             self.comment.append(emt)
@@ -677,7 +741,7 @@ class ChildNode(GameNode):
     move: chess.Move
     """The move leading to this node."""
 
-    starting_comment: list[str]
+    starting_comment: GameNodeComment
     """
     A comment for the start of a variation. Only nodes that
     actually start a variation (:func:`~chess.pgn.GameNode.starts_variation()`
@@ -698,7 +762,7 @@ def __init__(self, parent: GameNode, move: chess.Move, *, comment: Union[str, li
         self.parent.variations.append(self)
 
         self.nags.update(nags)
-        self.starting_comment = starting_comment if isinstance(starting_comment, list) else [starting_comment] if starting_comment else []
+        self.starting_comment = GameNodeComment(starting_comment)
 
     def board(self) -> chess.Board:
         stack: List[chess.Move] = []
@@ -1150,7 +1214,7 @@ def visit_board(self, board: chess.Board) -> None:
         """
         pass
 
-    def visit_comment(self, comment: list[str]) -> None:
+    def visit_comment(self, comment: GameNodeComment) -> None:
         """Called for each comment."""
         pass
 
@@ -1204,7 +1268,7 @@ def begin_game(self) -> None:
         self.game: GameT = self.Game()
 
         self.variation_stack: List[GameNode] = [self.game]
-        self.starting_comment: list[str] = []
+        self.starting_comment = GameNodeComment()
         self.in_variation = False
 
     def begin_headers(self) -> Headers:
@@ -1229,22 +1293,24 @@ def visit_result(self, result: str) -> None:
         if self.game.headers.get("Result", "*") == "*":
             self.game.headers["Result"] = result
 
-    def visit_comment(self, comment: list[str]) -> None:
+    def visit_comment(self, comment: GameNodeComment) -> None:
         if self.in_variation or (self.variation_stack[-1].parent is None and self.variation_stack[-1].is_end()):
             # Add as a comment for the current node if in the middle of
             # a variation. Add as a comment for the game if the comment
             # starts before any move.
             new_comment = self.variation_stack[-1].comment + comment
-            self.variation_stack[-1].comment = list(filter(None, new_comment))
+            new_comment.remove_empty()
+            self.variation_stack[-1].comment = new_comment
         else:
             # Otherwise, it is a starting comment.
             new_comment = self.starting_comment + comment
-            self.starting_comment = list(filter(None, new_comment))
+            new_comment.remove_empty()
+            self.starting_comment = new_comment
 
     def visit_move(self, board: chess.Board, move: chess.Move) -> None:
         self.variation_stack[-1] = self.variation_stack[-1].add_variation(move)
         self.variation_stack[-1].starting_comment = self.starting_comment
-        self.starting_comment = []
+        self.starting_comment = GameNodeComment()
         self.in_variation = True
 
     def handle_error(self, error: Exception) -> None:
@@ -1412,9 +1478,9 @@ def end_variation(self) -> None:
             self.write_token(") ")
             self.force_movenumber = True
 
-    def visit_comment(self, comment: list[str]) -> None:
+    def visit_comment(self, comment: GameNodeComment) -> None:
         if self.comments and (self.variations or not self.variation_depth):
-            self.write_token(" ".join("{ " + single_comment.replace("}", "").strip() + " }" for single_comment in comment) + " ")
+            self.write_token(comment.pgn_format() + " ")
             self.force_movenumber = True
 
     def visit_nag(self, nag: int) -> None:
@@ -1709,7 +1775,7 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any:
                     line = line[close_index + 1:]
 
                 if not skip_variation_depth:
-                    visitor.visit_comment(["".join(comment_lines)])
+                    visitor.visit_comment(GameNodeComment("".join(comment_lines)))
 
                 # Continue with the current line.
                 fresh_line = False
diff --git a/test.py b/test.py
index c912948c4..8750031ca 100755
--- a/test.py
+++ b/test.py
@@ -2078,29 +2078,29 @@ class PgnTestCase(unittest.TestCase):
 
     def test_exporter(self):
         game = chess.pgn.Game()
-        game.comment = ["Test game:"]
+        game.comment.set("Test game:")
         game.headers["Result"] = "*"
         game.headers["VeryLongHeader"] = "This is a very long header, much wider than the 80 columns that PGNs are formatted with by default"
 
         e4 = game.add_variation(game.board().parse_san("e4"))
-        e4.comment = ["Scandinavian Defense:"]
+        e4.comment.set("Scandinavian Defense:")
 
         e4_d5 = e4.add_variation(e4.board().parse_san("d5"))
 
         e4_h5 = e4.add_variation(e4.board().parse_san("h5"))
         e4_h5.nags.add(chess.pgn.NAG_MISTAKE)
-        e4_h5.starting_comment = ["This"]
-        e4_h5.comment = ["is nonsense"]
+        e4_h5.starting_comment.set("This")
+        e4_h5.comment.set("is nonsense")
 
         e4_e5 = e4.add_variation(e4.board().parse_san("e5"))
         e4_e5_Qf3 = e4_e5.add_variation(e4_e5.board().parse_san("Qf3"))
         e4_e5_Qf3.nags.add(chess.pgn.NAG_MISTAKE)
 
         e4_c5 = e4.add_variation(e4.board().parse_san("c5"))
-        e4_c5.comment = ["Sicilian"]
+        e4_c5.comment.set("Sicilian")
 
         e4_d5_exd5 = e4_d5.add_main_variation(e4_d5.board().parse_san("exd5"))
-        e4_d5_exd5.comment = ["Best", "and the end of this example"]
+        e4_d5_exd5.comment.set(["Best", "and the end of this example"])
 
         # Test string exporter with various options.
         exporter = chess.pgn.StringExporter(headers=False, comments=False, variations=False)
@@ -2828,7 +2828,7 @@ def test_recursion(self):
 
     def test_annotations(self):
         game = chess.pgn.Game()
-        game.comment = ["foo [%bar] baz"]
+        game.comment = chess.pgn.GameNodeComment("foo [%bar] baz")
 
         self.assertTrue(game.clock() is None)
         clock = 12345
@@ -2879,7 +2879,7 @@ def test_eval(self):
 
     def test_float_emt(self):
         game = chess.pgn.Game()
-        game.comment = ["[%emt 0:00:01.234]"]
+        game.comment = chess.pgn.GameNodeComment("[%emt 0:00:01.234]")
         self.assertEqual(game.emt(), 1.234)
 
         game.set_emt(6.54321)
@@ -2892,7 +2892,7 @@ def test_float_emt(self):
 
     def test_float_clk(self):
         game = chess.pgn.Game()
-        game.comment = ["[%clk 0:00:01.234]"]
+        game.comment.set("[%clk 0:00:01.234]")
         self.assertEqual(game.clock(), 1.234)
 
         game.set_clock(6.54321)

From 829a3bf6ded7f8d738655ee924df90812b8af0c2 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 22 Feb 2024 04:01:57 -0800
Subject: [PATCH 502/613] Empty GameNodeComments equal empty strings

---
 chess/pgn.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 763b90f02..058c932a8 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -239,7 +239,7 @@ def __add__(self, other: GameNodeComment) -> GameNodeComment:
 
     def __eq__(self, other: object) -> bool:
         if isinstance(other, str):
-            return len(self) == 1 and self[0] == other
+            return (len(self) == 1 and self[0] == other) or (not self and not other)
         elif isinstance(other, list):
             return self._comments == other
         elif isinstance(other, GameNodeComment):

From 7e0081e6d5b5f1188224a02ab9d78f0fe6b5b80d Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 22 Feb 2024 04:02:15 -0800
Subject: [PATCH 503/613] Revert unnecessary test changes

---
 test.py | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/test.py b/test.py
index 8750031ca..f6d30a4d1 100755
--- a/test.py
+++ b/test.py
@@ -2219,7 +2219,7 @@ def test_read_game_with_multicomment_move(self):
         pgn = io.StringIO("1. e4 {A common opening} 1... e5 {A common response} {An uncommon comment}")
         game = chess.pgn.read_game(pgn)
         first_move = game.variation(0)
-        self.assertEqual(first_move.comment, ["A common opening"])
+        self.assertEqual(first_move.comment, "A common opening")
         second_move = first_move.variation(0)
         self.assertEqual(second_move.comment, ["A common response", "An uncommon comment"])
 
@@ -2237,7 +2237,7 @@ def test_comment_at_eol(self):
 
         # Make sure the comment for the second variation is there.
         self.assertIn(5, node[1].nags)
-        self.assertEqual(node[1].comment, ["\n/\\ Ne7, c6"])
+        self.assertEqual(node[1].comment, "\n/\\ Ne7, c6")
 
     def test_promotion_without_equals(self):
         # Example game from https://github.com/rozim/ChessData as originally
@@ -2325,12 +2325,12 @@ def test_variation_stack(self):
     def test_game_starting_comment(self):
         pgn = io.StringIO("{ Game starting comment } 1. d3")
         game = chess.pgn.read_game(pgn)
-        self.assertEqual(game.comment, ["Game starting comment"])
+        self.assertEqual(game.comment, "Game starting comment")
         self.assertEqual(game[0].san(), "d3")
 
         pgn = io.StringIO("{ Empty game, but has a comment }")
         game = chess.pgn.read_game(pgn)
-        self.assertEqual(game.comment, ["Empty game, but has a comment"])
+        self.assertEqual(game.comment, "Empty game, but has a comment")
 
     def test_game_starting_variation(self):
         pgn = io.StringIO(textwrap.dedent("""\
@@ -2338,7 +2338,7 @@ def test_game_starting_variation(self):
             """))
 
         game = chess.pgn.read_game(pgn)
-        self.assertEqual(game.comment, ["Start of game"])
+        self.assertEqual(game.comment, "Start of game")
 
         node = game[0]
         self.assertEqual(node.move, chess.Move.from_uci("e2e4"))
@@ -2348,7 +2348,7 @@ def test_game_starting_variation(self):
         node = game[1]
         self.assertEqual(node.move, chess.Move.from_uci("d2d4"))
         self.assertFalse(node.comment)
-        self.assertEqual(node.starting_comment, ["Start of variation"])
+        self.assertEqual(node.starting_comment, "Start of variation")
 
     def test_annotation_symbols(self):
         pgn = io.StringIO("1. b4?! g6 2. Bb2 Nc6? 3. Bxh8!!")
@@ -2693,12 +2693,12 @@ def test_add_line(self):
         tail = game.add_line(moves, starting_comment="start", comment="end", nags=(17, 42))
 
         self.assertEqual(tail.parent.move, chess.Move.from_uci("g1f3"))
-        self.assertEqual(tail.parent.starting_comment, ["start"])
-        self.assertEqual(tail.parent.comment, [])
+        self.assertEqual(tail.parent.starting_comment, "start")
+        self.assertEqual(tail.parent.comment, "")
         self.assertEqual(len(tail.parent.nags), 0)
 
         self.assertEqual(tail.move, chess.Move.from_uci("d7d5"))
-        self.assertEqual(tail.comment, ["end"])
+        self.assertEqual(tail.comment, "end")
         self.assertIn(42, tail.nags)
 
     def test_mainline(self):
@@ -2828,7 +2828,7 @@ def test_recursion(self):
 
     def test_annotations(self):
         game = chess.pgn.Game()
-        game.comment = chess.pgn.GameNodeComment("foo [%bar] baz")
+        game.comment.set("foo [%bar] baz")
 
         self.assertTrue(game.clock() is None)
         clock = 12345
@@ -2869,7 +2869,7 @@ def test_annotations(self):
 
         game.set_clock(None)
         game.set_arrows([])
-        self.assertEqual(game.comment, ["foo [%bar] baz"])
+        self.assertEqual(game.comment, "foo [%bar] baz")
 
     def test_eval(self):
         game = chess.pgn.Game()
@@ -2879,15 +2879,15 @@ def test_eval(self):
 
     def test_float_emt(self):
         game = chess.pgn.Game()
-        game.comment = chess.pgn.GameNodeComment("[%emt 0:00:01.234]")
+        game.comment.set("[%emt 0:00:01.234]")
         self.assertEqual(game.emt(), 1.234)
 
         game.set_emt(6.54321)
-        self.assertEqual(game.comment, ["[%emt 0:00:06.543]"])
+        self.assertEqual(game.comment, "[%emt 0:00:06.543]")
         self.assertEqual(game.emt(), 6.543)
 
         game.set_emt(-70)
-        self.assertEqual(game.comment, ["[%emt 0:00:00]"])  # Clamped
+        self.assertEqual(game.comment, "[%emt 0:00:00]")  # Clamped
         self.assertEqual(game.emt(), 0)
 
     def test_float_clk(self):
@@ -2896,11 +2896,11 @@ def test_float_clk(self):
         self.assertEqual(game.clock(), 1.234)
 
         game.set_clock(6.54321)
-        self.assertEqual(game.comment, ["[%clk 0:00:06.543]"])
+        self.assertEqual(game.comment, "[%clk 0:00:06.543]")
         self.assertEqual(game.clock(), 6.543)
 
         game.set_clock(-70)
-        self.assertEqual(game.comment, ["[%clk 0:00:00]"])  # Clamped
+        self.assertEqual(game.comment, "[%clk 0:00:00]")  # Clamped
         self.assertEqual(game.clock(), 0)
 
     def test_node_turn(self):

From b524c3a130c8a535b060af7e73e82339c97617eb Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 22 Feb 2024 04:24:26 -0800
Subject: [PATCH 504/613] Combine append() and extend() methods

---
 chess/pgn.py | 23 ++++++++---------------
 1 file changed, 8 insertions(+), 15 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 058c932a8..a44aea6fb 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -209,13 +209,13 @@ def remove_empty(self) -> None:
         """Remove empty comments from the comment list."""
         self._comments = list(filter(None, self._comments))
 
-    def append(self, new_comment: str) -> None:
-        """Append a new comment to the end of the comment list."""
-        self._comments.append(new_comment)
-
-    def extend(self, new_comments: list[str]) -> None:
-        """Append several new comments to the end of the comment list."""
-        self._comments.extend(new_comments)
+    def append(self, new_comment: Union[str, list[str]]) -> None:
+        """Append one or more new comments to the end of the comment list."""
+        if new_comment:
+            if isinstance(new_comment, str):
+                self._comments.append(new_comment)
+            else:
+                self._comments.extend(new_comment)
 
     def insert(self, index: int, new_comment: str) -> None:
         """Insert a new comment before the specified index."""
@@ -494,14 +494,7 @@ def add_line(self, moves: Iterable[chess.Move], *, comment: Union[str, list[str]
             starting_comment = ""
 
         # Merge comment and NAGs.
-        if node.comment:
-            if isinstance(comment, str):
-                node.comment.append(comment)
-            else:
-                node.comment.extend(comment)
-        else:
-            node.comment.set(comment)
-
+        node.comment.append(comment)
         node.nags.update(nags)
 
         return node

From 9123ebd98765ccda2b81b21118d0a7e007937d10 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 22 Feb 2024 04:30:00 -0800
Subject: [PATCH 505/613] Add missing return type annotation

---
 chess/pgn.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index a44aea6fb..6fc34133c 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -193,7 +193,7 @@ class GameNodeComment:
     def __init__(self, comment: Union[str, list[str]] = ""):
         self.set(comment)
 
-    def set(self, new_comment: Union[str, list[str]]):
+    def set(self, new_comment: Union[str, list[str]]) -> None:
         """Replace the comment with a new comment or a list of comments."""
         self._comments = new_comment if isinstance(new_comment, list) else [new_comment] if new_comment else []
 

From 4e084cc1d652fcf4070dd8eee0a5c561534631d5 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 22 Feb 2024 20:56:04 -0800
Subject: [PATCH 506/613] Remove unneeded GameNodeComment instance

---
 chess/pgn.py | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 6fc34133c..78c238287 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -201,9 +201,8 @@ def pgn_format(self) -> str:
         """Create a string representation of the comments in PGN format."""
         comments = list(map(lambda s: s.replace("{", ""), self._comments))
         comments = list(map(lambda s: s.replace("}", "").strip(), comments))
-        output_comments = GameNodeComment(comments)
-        output_comments.remove_empty()
-        return "{ " + output_comments.join(" } { ") + " }"
+        comments = list(filter(None, comments))
+        return "{ " + " } { ".join(comments) + " }"
 
     def remove_empty(self) -> None:
         """Remove empty comments from the comment list."""

From 91801c873b58d20a48d533027d4f940907a4a3ac Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 22 Feb 2024 21:37:36 -0800
Subject: [PATCH 507/613] Use @property to make changes backwards compatible

---
 chess/pgn.py | 52 ++++++++++++++++++++++++++++++++++++++++++++++------
 test.py      | 18 +++++++++---------
 2 files changed, 55 insertions(+), 15 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 78c238287..5cc70747a 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -233,8 +233,13 @@ def __getitem__(self, index: int) -> str:
     def __setitem__(self, index: int, new_comment: str) -> None:
         self._comments[index] = new_comment
 
-    def __add__(self, other: GameNodeComment) -> GameNodeComment:
-        return GameNodeComment(self._comments + other._comments)
+    def __add__(self, other: Union[str, list[str], GameNodeComment]) -> GameNodeComment:
+        if not isinstance(other, GameNodeComment):
+            new_node_comment = GameNodeComment(self._comments)
+            new_node_comment.append(other)
+            return new_node_comment
+        else:
+            return GameNodeComment(self._comments + other._comments)
 
     def __eq__(self, other: object) -> bool:
         if isinstance(other, str):
@@ -260,13 +265,37 @@ class GameNode(abc.ABC):
     variations: List[ChildNode]
     """A list of child nodes."""
 
-    comment: GameNodeComment
+    _comment: GameNodeComment
     """
     A comment that goes behind the move leading to this node. Comments
     that occur before any moves are assigned to the root node.
     """
 
-    starting_comment: GameNodeComment
+    @property
+    def comment(self) -> GameNodeComment:
+        return self._comment
+
+    @comment.setter
+    def comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
+        if isinstance(new_comment, GameNodeComment):
+            self._comment = new_comment
+        else:
+            self._comment = GameNodeComment(new_comment)
+
+
+    _starting_comment: GameNodeComment
+
+    @property
+    def starting_comment(self) -> GameNodeComment:
+        return self._starting_comment
+
+    @starting_comment.setter
+    def starting_comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
+        if isinstance(new_comment, GameNodeComment):
+            self._starting_comment = new_comment
+        else:
+            self._starting_comment = GameNodeComment(new_comment)
+
     nags: Set[int]
 
     def __init__(self, *, comment: Union[str, list[str]] = "") -> None:
@@ -733,7 +762,7 @@ class ChildNode(GameNode):
     move: chess.Move
     """The move leading to this node."""
 
-    starting_comment: GameNodeComment
+    _starting_comment: GameNodeComment
     """
     A comment for the start of a variation. Only nodes that
     actually start a variation (:func:`~chess.pgn.GameNode.starts_variation()`
@@ -741,6 +770,17 @@ class ChildNode(GameNode):
     a starting comment.
     """
 
+    @property
+    def starting_comment(self) -> GameNodeComment:
+        return self._starting_comment
+
+    @starting_comment.setter
+    def starting_comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
+        if isinstance(new_comment, GameNodeComment):
+            self._starting_comment = new_comment
+        else:
+            self._starting_comment = GameNodeComment(new_comment)
+
     nags: Set[int]
     """
     A set of NAGs as integers. NAGs always go behind a move, so the root
@@ -1767,7 +1807,7 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any:
                     line = line[close_index + 1:]
 
                 if not skip_variation_depth:
-                    visitor.visit_comment(GameNodeComment("".join(comment_lines)))
+                    visitor.visit_comment("".join(comment_lines))
 
                 # Continue with the current line.
                 fresh_line = False
diff --git a/test.py b/test.py
index f6d30a4d1..91e54e5d5 100755
--- a/test.py
+++ b/test.py
@@ -2078,29 +2078,29 @@ class PgnTestCase(unittest.TestCase):
 
     def test_exporter(self):
         game = chess.pgn.Game()
-        game.comment.set("Test game:")
+        game.comment = "Test game:"
         game.headers["Result"] = "*"
         game.headers["VeryLongHeader"] = "This is a very long header, much wider than the 80 columns that PGNs are formatted with by default"
 
         e4 = game.add_variation(game.board().parse_san("e4"))
-        e4.comment.set("Scandinavian Defense:")
+        e4.comment = "Scandinavian Defense:"
 
         e4_d5 = e4.add_variation(e4.board().parse_san("d5"))
 
         e4_h5 = e4.add_variation(e4.board().parse_san("h5"))
         e4_h5.nags.add(chess.pgn.NAG_MISTAKE)
-        e4_h5.starting_comment.set("This")
-        e4_h5.comment.set("is nonsense")
+        e4_h5.starting_comment = "This"
+        e4_h5.comment = "is nonsense"
 
         e4_e5 = e4.add_variation(e4.board().parse_san("e5"))
         e4_e5_Qf3 = e4_e5.add_variation(e4_e5.board().parse_san("Qf3"))
         e4_e5_Qf3.nags.add(chess.pgn.NAG_MISTAKE)
 
         e4_c5 = e4.add_variation(e4.board().parse_san("c5"))
-        e4_c5.comment.set("Sicilian")
+        e4_c5.comment = "Sicilian"
 
         e4_d5_exd5 = e4_d5.add_main_variation(e4_d5.board().parse_san("exd5"))
-        e4_d5_exd5.comment.set(["Best", "and the end of this example"])
+        e4_d5_exd5.comment = ["Best", "and the end of this example"]
 
         # Test string exporter with various options.
         exporter = chess.pgn.StringExporter(headers=False, comments=False, variations=False)
@@ -2828,7 +2828,7 @@ def test_recursion(self):
 
     def test_annotations(self):
         game = chess.pgn.Game()
-        game.comment.set("foo [%bar] baz")
+        game.comment = "foo [%bar] baz"
 
         self.assertTrue(game.clock() is None)
         clock = 12345
@@ -2879,7 +2879,7 @@ def test_eval(self):
 
     def test_float_emt(self):
         game = chess.pgn.Game()
-        game.comment.set("[%emt 0:00:01.234]")
+        game.comment = "[%emt 0:00:01.234]"
         self.assertEqual(game.emt(), 1.234)
 
         game.set_emt(6.54321)
@@ -2892,7 +2892,7 @@ def test_float_emt(self):
 
     def test_float_clk(self):
         game = chess.pgn.Game()
-        game.comment.set("[%clk 0:00:01.234]")
+        game.comment = "[%clk 0:00:01.234]"
         self.assertEqual(game.clock(), 1.234)
 
         game.set_clock(6.54321)

From 54e044ac6fc2e9288453a72b3a8db435d3380f2b Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 22 Feb 2024 21:50:47 -0800
Subject: [PATCH 508/613] Positive branch first

---
 chess/pgn.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 5cc70747a..a9910f45b 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -234,12 +234,12 @@ def __setitem__(self, index: int, new_comment: str) -> None:
         self._comments[index] = new_comment
 
     def __add__(self, other: Union[str, list[str], GameNodeComment]) -> GameNodeComment:
-        if not isinstance(other, GameNodeComment):
-            new_node_comment = GameNodeComment(self._comments)
+        if isinstance(other, GameNodeComment):
+            return GameNodeComment(self._comments + other._comments)
+        else:
+            new_node_comment = GameNodeComment(self._comments.copy())
             new_node_comment.append(other)
             return new_node_comment
-        else:
-            return GameNodeComment(self._comments + other._comments)
 
     def __eq__(self, other: object) -> bool:
         if isinstance(other, str):

From aa47f1e7de3a36ff117b6b2ac9c3ef0b23bef3b8 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 22 Feb 2024 22:11:05 -0800
Subject: [PATCH 509/613] Add display methods to GameNodeComment

---
 chess/pgn.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/chess/pgn.py b/chess/pgn.py
index a9910f45b..7695a1c68 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -251,6 +251,12 @@ def __eq__(self, other: object) -> bool:
         else:
             return False
 
+    def __repr__(self) -> str:
+        return f"{self.__class__.__name__}({self._comments})"
+
+    def __str__(self) -> str:
+        return self.pgn_format()
+
 
 class GameNode(abc.ABC):
     parent: Optional[GameNode]

From f1a56125104ca3c80a9c615c949d18401b465948 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Thu, 22 Feb 2024 22:57:05 -0800
Subject: [PATCH 510/613] Create method for deleting individual comments

---
 chess/pgn.py | 4 ++++
 test.py      | 8 ++++++++
 2 files changed, 12 insertions(+)

diff --git a/chess/pgn.py b/chess/pgn.py
index 7695a1c68..fd3096013 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -220,6 +220,10 @@ def insert(self, index: int, new_comment: str) -> None:
         """Insert a new comment before the specified index."""
         self._comments.insert(index, new_comment)
 
+    def pop(self, index: int = -1) -> None:
+        """Delete comment at the given index (default is the last comment)."""
+        self._comments.pop(index)
+
     def join(self, joiner: str) -> str:
         """Join all of the comments together with a joiner string between each."""
         return joiner.join(self._comments)
diff --git a/test.py b/test.py
index 91e54e5d5..cbc41d6dd 100755
--- a/test.py
+++ b/test.py
@@ -2222,6 +2222,14 @@ def test_read_game_with_multicomment_move(self):
         self.assertEqual(first_move.comment, "A common opening")
         second_move = first_move.variation(0)
         self.assertEqual(second_move.comment, ["A common response", "An uncommon comment"])
+        second_move.comment.pop()
+        self.assertEqual(second_move.comment, ["A common response"])
+        self.assertEqual(second_move.comment, "A common response")
+        second_move.comment.append("A replaced comment")
+        self.assertEqual(second_move.comment, ["A common response", "A replaced comment"])
+        second_move.comment.pop(0)
+        self.assertEqual(second_move.comment, ["A replaced comment"])
+        self.assertEqual(second_move.comment, "A replaced comment")
 
     def test_comment_at_eol(self):
         pgn = io.StringIO(textwrap.dedent("""\

From 8e91525e47593932911951919a6855f2ea2aa170 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 24 Feb 2024 20:20:38 +0100
Subject: [PATCH 511/613] Add sf16.1 WDL model

---
 chess/engine.py | 17 +++++++++++++++--
 test.py         |  3 ++-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index b1d3896ab..b72bf5907 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -24,7 +24,7 @@
 from types import TracebackType
 from typing import Any, Callable, Coroutine, Deque, Dict, Generator, Generic, Iterable, Iterator, List, Literal, Mapping, MutableMapping, Optional, Tuple, Type, TypedDict, TypeVar, Union
 
-WdlModel = Literal["sf", "sf16", "sf15.1", "sf15", "sf14", "sf12", "lichess"]
+WdlModel = Literal["sf", "sf16.1", "sf16", "sf15.1", "sf15", "sf14", "sf12", "lichess"]
 
 
 T = TypeVar("T")
@@ -516,6 +516,16 @@ def __ge__(self, other: object) -> bool:
         else:
             return NotImplemented
 
+def _sf16_1_wins(cp: int, *, ply=int) -> int:
+    # https://github.com/official-stockfish/Stockfish/blob/sf_16.1/src/uci.cpp#L48
+    NormalizeToPawnValue = 356
+    # https://github.com/official-stockfish/Stockfish/blob/sf_16.1/src/uci.cpp#L383-L384
+    m = min(120, max(8, ply / 2 + 1)) / 32
+    a = (((-1.06249702 * m + 7.42016937) * m + 0.89425629) * m) + 348.60356174
+    b = (((-5.33122190 * m + 39.57831533) * m + -90.84473771) * m) + 123.40620748
+    x = min(4000, max(cp * NormalizeToPawnValue / 100, -4000))
+    return int(0.5 + 1000 / (1 + math.exp((a - x) / b)))
+
 def _sf16_wins(cp: int, *, ply: int) -> int:
     # https://github.com/official-stockfish/Stockfish/blob/sf_16/src/uci.h#L38
     NormalizeToPawnValue = 328
@@ -594,9 +604,12 @@ def wdl(self, *, model: WdlModel = "sf", ply: int = 30) -> Wdl:
         elif model == "sf15.1":
             wins = _sf15_1_wins(self.cp, ply=ply)
             losses = _sf15_1_wins(-self.cp, ply=ply)
-        else:
+        elif model == "sf16":
             wins = _sf16_wins(self.cp, ply=ply)
             losses = _sf16_wins(-self.cp, ply=ply)
+        else:
+            wins = _sf16_1_wins(self.cp, ply=ply)
+            losses = _sf16_1_wins(-self.cp, ply=ply)
         draws = 1000 - wins - losses
         return Wdl(wins, draws, losses)
 
diff --git a/test.py b/test.py
index e1d0d50c5..8dbc95a25 100755
--- a/test.py
+++ b/test.py
@@ -2995,7 +2995,7 @@ def test_score_ordering(self):
                 self.assertEqual(i >= j, a >= b)
                 self.assertEqual(i < j, a.score(mate_score=100000) < b.score(mate_score=100000))
 
-                for model in ["sf12", "sf14", "sf15", "sf15.1", "sf16"]:
+                for model in ["sf12", "sf14", "sf15", "sf15.1", "sf16", "sf16.1"]:
                     self.assertTrue(not (i < j) or a.wdl(model=model).expectation() <= b.wdl(model=model).expectation())
                     self.assertTrue(not (i < j) or a.wdl(model=model).winning_chance() <= b.wdl(model=model).winning_chance())
                     self.assertTrue(not (i < j) or a.wdl(model=model).losing_chance() >= b.wdl(model=model).losing_chance())
@@ -3035,6 +3035,7 @@ def test_wdl_model(self):
         self.assertEqual(chess.engine.Cp(40).wdl(model="sf15", ply=25), chess.engine.Wdl(58, 937, 5))
         self.assertEqual(chess.engine.Cp(100).wdl(model="sf15.1", ply=64), chess.engine.Wdl(497, 503, 0))
         self.assertEqual(chess.engine.Cp(-52).wdl(model="sf16", ply=63), chess.engine.Wdl(0, 932, 68))
+        self.assertEqual(chess.engine.Cp(51).wdl(model="sf16.1", ply=158), chess.engine.Wdl(36, 964, 0))
 
     @catchAndSkip(FileNotFoundError, "need stockfish")
     def test_sf_forced_mates(self):

From 315052c0105ea1e0d0b4e1cbee70577fd9349f2d Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 24 Feb 2024 20:25:56 +0100
Subject: [PATCH 512/613] Fix argument syntax

---
 chess/engine.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index b72bf5907..c2b470dd5 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -516,7 +516,7 @@ def __ge__(self, other: object) -> bool:
         else:
             return NotImplemented
 
-def _sf16_1_wins(cp: int, *, ply=int) -> int:
+def _sf16_1_wins(cp: int, *, ply: int) -> int:
     # https://github.com/official-stockfish/Stockfish/blob/sf_16.1/src/uci.cpp#L48
     NormalizeToPawnValue = 356
     # https://github.com/official-stockfish/Stockfish/blob/sf_16.1/src/uci.cpp#L383-L384

From 8756e7878b2076fe9a7fe574086e43be58d4e7a2 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 28 Feb 2024 01:05:43 -0800
Subject: [PATCH 513/613] Test that GameNodeComment is iterable

---
 test.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/test.py b/test.py
index cbc41d6dd..ee770de0f 100755
--- a/test.py
+++ b/test.py
@@ -2226,7 +2226,11 @@ def test_read_game_with_multicomment_move(self):
         self.assertEqual(second_move.comment, ["A common response"])
         self.assertEqual(second_move.comment, "A common response")
         second_move.comment.append("A replaced comment")
-        self.assertEqual(second_move.comment, ["A common response", "A replaced comment"])
+        multiple_comments = ["A common response", "A replaced comment"]
+        self.assertEqual(second_move.comment, multiple_comments)
+        for move_comment, test_comment in zip(second_move.comment, multiple_comments):
+            self.assertEqual(move_comment, test_comment)
+        self.assertEqual(list(second_move.comment), multiple_comments)
         second_move.comment.pop(0)
         self.assertEqual(second_move.comment, ["A replaced comment"])
         self.assertEqual(second_move.comment, "A replaced comment")

From 603c9755e23093ddf985a603fa19f6b24878cad0 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 28 Feb 2024 01:20:01 -0800
Subject: [PATCH 514/613] Make pgn_format() code easier to read

---
 chess/pgn.py | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index fd3096013..2d7f31096 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -199,10 +199,9 @@ def set(self, new_comment: Union[str, list[str]]) -> None:
 
     def pgn_format(self) -> str:
         """Create a string representation of the comments in PGN format."""
-        comments = list(map(lambda s: s.replace("{", ""), self._comments))
-        comments = list(map(lambda s: s.replace("}", "").strip(), comments))
-        comments = list(filter(None, comments))
-        return "{ " + " } { ".join(comments) + " }"
+        comments = map(lambda s: s.replace("{", ""), self._comments)
+        comments = map(lambda s: s.replace("}", "").strip(), comments)
+        return " ".join(f"{{ {comment} }}" for comment in comments if comment)
 
     def remove_empty(self) -> None:
         """Remove empty comments from the comment list."""

From cce50dcacd0774d6a6595de1ce65b5f0dd7b5101 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 28 Feb 2024 01:54:19 -0800
Subject: [PATCH 515/613] Use built-in join()

---
 chess/pgn.py | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 2d7f31096..0e0345a92 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -223,10 +223,6 @@ def pop(self, index: int = -1) -> None:
         """Delete comment at the given index (default is the last comment)."""
         self._comments.pop(index)
 
-    def join(self, joiner: str) -> str:
-        """Join all of the comments together with a joiner string between each."""
-        return joiner.join(self._comments)
-
     def __len__(self) -> int:
         return len(self._comments)
 
@@ -236,6 +232,9 @@ def __getitem__(self, index: int) -> str:
     def __setitem__(self, index: int, new_comment: str) -> None:
         self._comments[index] = new_comment
 
+    def __iter__(self) -> Iterator[str]:
+        return iter(self._comments)
+
     def __add__(self, other: Union[str, list[str], GameNodeComment]) -> GameNodeComment:
         if isinstance(other, GameNodeComment):
             return GameNodeComment(self._comments + other._comments)
@@ -543,7 +542,7 @@ def eval(self) -> Optional[chess.engine.PovScore]:
 
         Complexity is `O(n)`.
         """
-        match = EVAL_REGEX.search(self.comment.join(" "))
+        match = EVAL_REGEX.search(" ".join(self.comment))
         if not match:
             return None
 
@@ -569,7 +568,7 @@ def eval_depth(self) -> Optional[int]:
 
         Complexity is `O(1)`.
         """
-        match = EVAL_REGEX.search(self.comment.join(" "))
+        match = EVAL_REGEX.search(" ".join(self.comment))
         return int(match.group("depth")) if match and match.group("depth") else None
 
     def set_eval(self, score: Optional[chess.engine.PovScore], depth: Optional[int] = None) -> None:
@@ -605,7 +604,7 @@ def arrows(self) -> List[chess.svg.Arrow]:
         Returns a list of :class:`arrows `.
         """
         arrows = []
-        for match in ARROWS_REGEX.finditer(self.comment.join(" ")):
+        for match in ARROWS_REGEX.finditer(" ".join(self.comment)):
             for group in match.group("arrows").split(","):
                 arrows.append(chess.svg.Arrow.from_pgn(group))
 
@@ -649,7 +648,7 @@ def clock(self) -> Optional[float]:
         Returns the player's remaining time to the next time control after this
         move, in seconds.
         """
-        match = CLOCK_REGEX.search(self.comment.join(" "))
+        match = CLOCK_REGEX.search(" ".join(self.comment))
         if match is None:
             return None
         return int(match.group("hours")) * 3600 + int(match.group("minutes")) * 60 + float(match.group("seconds"))
@@ -687,7 +686,7 @@ def emt(self) -> Optional[float]:
         Returns the player's elapsed move time use for the comment of this
         move, in seconds.
         """
-        match = EMT_REGEX.search(self.comment.join(" "))
+        match = EMT_REGEX.search(" ".join(self.comment))
         if match is None:
             return None
         return int(match.group("hours")) * 3600 + int(match.group("minutes")) * 60 + float(match.group("seconds"))

From 4e695e2bc7c50066c0f84abd4206e61c917b2d03 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 28 Feb 2024 02:04:08 -0800
Subject: [PATCH 516/613] Add docstrings for methods

Also, fix spacing.
---
 chess/pgn.py | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 0e0345a92..36cac2c59 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -190,7 +190,9 @@ class GameNodeComment:
 
     A class that can hold one or more comments for a GameNode.
     """
+
     def __init__(self, comment: Union[str, list[str]] = ""):
+        """Create a new comment."""
         self.set(comment)
 
     def set(self, new_comment: Union[str, list[str]]) -> None:
@@ -224,18 +226,23 @@ def pop(self, index: int = -1) -> None:
         self._comments.pop(index)
 
     def __len__(self) -> int:
+        """Get the number of comments in this node."""
         return len(self._comments)
 
     def __getitem__(self, index: int) -> str:
+        """Get the comment at the given index."""
         return self._comments[index]
 
     def __setitem__(self, index: int, new_comment: str) -> None:
+        """Change the comment at the given index."""
         self._comments[index] = new_comment
 
     def __iter__(self) -> Iterator[str]:
+        """Return an iterator over all comments."""
         return iter(self._comments)
 
     def __add__(self, other: Union[str, list[str], GameNodeComment]) -> GameNodeComment:
+        """Create a new comment set by adding two comment sets with +."""
         if isinstance(other, GameNodeComment):
             return GameNodeComment(self._comments + other._comments)
         else:
@@ -244,6 +251,7 @@ def __add__(self, other: Union[str, list[str], GameNodeComment]) -> GameNodeComm
             return new_node_comment
 
     def __eq__(self, other: object) -> bool:
+        """Check for equality between two comment sets."""
         if isinstance(other, str):
             return (len(self) == 1 and self[0] == other) or (not self and not other)
         elif isinstance(other, list):
@@ -254,9 +262,11 @@ def __eq__(self, other: object) -> bool:
             return False
 
     def __repr__(self) -> str:
+        """Return a code-like representation of the class."""
         return f"{self.__class__.__name__}({self._comments})"
 
     def __str__(self) -> str:
+        """Return a string representation of the comments in PGN format."""
         return self.pgn_format()
 
 
@@ -290,7 +300,6 @@ def comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
         else:
             self._comment = GameNodeComment(new_comment)
 
-
     _starting_comment: GameNodeComment
 
     @property

From d1dce61a45ed3784ce867ec0218d6fb3ca47e735 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 18 Apr 2024 15:53:08 +0200
Subject: [PATCH 517/613] Bump Sphinx to 7.3.6

---
 docs/requirements.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/requirements.txt b/docs/requirements.txt
index a63c6a7ca..7516f64de 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,3 @@
-Sphinx==6.1.2
+Sphinx==7.3.6
 sphinxcontrib-jquery==4.1
 sphinx-rtd-theme==1.3.0

From 4c7a9025e3442fb75a14eae367fd88200e210042 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 18 Apr 2024 17:40:45 +0200
Subject: [PATCH 518/613] Use typing_extensions.TypeAlias (#564)

---
 chess/__init__.py | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index a9328a04b..9eeb2c5e2 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -24,15 +24,19 @@
 
 from typing import ClassVar, Callable, Counter, Dict, Generic, Hashable, Iterable, Iterator, List, Literal, Mapping, Optional, SupportsInt, Tuple, Type, TypeVar, Union
 
+if typing.TYPE_CHECKING:
+    from typing_extensions import TypeAlias
+
+
 EnPassantSpec = Literal["legal", "fen", "xfen"]
 
 
-Color = bool
+Color: TypeAlias = bool
 COLORS = [WHITE, BLACK] = [True, False]
 ColorName = Literal["white", "black"]
 COLOR_NAMES: List[ColorName] = ["black", "white"]
 
-PieceType = int
+PieceType: TypeAlias = int
 PIECE_TYPES = [PAWN, KNIGHT, BISHOP, ROOK, QUEEN, KING] = range(1, 7)
 PIECE_SYMBOLS = [None, "p", "n", "b", "r", "q", "k"]
 PIECE_NAMES = [None, "pawn", "knight", "bishop", "rook", "queen", "king"]
@@ -157,7 +161,7 @@ class AmbiguousMoveError(ValueError):
     """Raised when the attempted move is ambiguous in the current position"""
 
 
-Square = int
+Square: TypeAlias = int
 SQUARES = [
     A1, B1, C1, D1, E1, F1, G1, H1,
     A2, B2, C2, D2, E2, F2, G2, H2,
@@ -233,7 +237,7 @@ def square_mirror(square: Square) -> Square:
 SQUARES_180 = [square_mirror(sq) for sq in SQUARES]
 
 
-Bitboard = int
+Bitboard: TypeAlias = int
 BB_EMPTY = 0
 BB_ALL = 0xffff_ffff_ffff_ffff
 
@@ -3816,7 +3820,7 @@ def __repr__(self) -> str:
         return f""
 
 
-IntoSquareSet = Union[SupportsInt, Iterable[Square]]
+IntoSquareSet: TypeAlias = Union[SupportsInt, Iterable[Square]]
 
 class SquareSet:
     """

From 6af0ff4c8947486e3e3fa8e83ca88815301aaa37 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 18 Apr 2024 17:59:10 +0200
Subject: [PATCH 519/613] Expand core constant definitions

More verbose, but better IDE support
---
 chess/__init__.py | 234 ++++++++++++++++++++++++++++++++++------------
 1 file changed, 175 insertions(+), 59 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 9eeb2c5e2..f9a9ab7f5 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -32,12 +32,20 @@
 
 
 Color: TypeAlias = bool
-COLORS = [WHITE, BLACK] = [True, False]
+WHITE: Color = True
+BLACK: Color = False
+COLORS: List[Color] = [WHITE, BLACK]
 ColorName = Literal["white", "black"]
 COLOR_NAMES: List[ColorName] = ["black", "white"]
 
 PieceType: TypeAlias = int
-PIECE_TYPES = [PAWN, KNIGHT, BISHOP, ROOK, QUEEN, KING] = range(1, 7)
+PAWN: PieceType = 1
+KNIGHT: PieceType = 2
+BISHOP: PieceType = 3
+ROOK: PieceType = 4
+QUEEN: PieceType = 5
+KING: PieceType = 6
+PIECE_TYPES: List[PieceType] = [PAWN, KNIGHT, BISHOP, ROOK, QUEEN, KING]
 PIECE_SYMBOLS = [None, "p", "n", "b", "r", "q", "k"]
 PIECE_NAMES = [None, "pawn", "knight", "bishop", "rook", "queen", "king"]
 
@@ -162,16 +170,71 @@ class AmbiguousMoveError(ValueError):
 
 
 Square: TypeAlias = int
-SQUARES = [
-    A1, B1, C1, D1, E1, F1, G1, H1,
-    A2, B2, C2, D2, E2, F2, G2, H2,
-    A3, B3, C3, D3, E3, F3, G3, H3,
-    A4, B4, C4, D4, E4, F4, G4, H4,
-    A5, B5, C5, D5, E5, F5, G5, H5,
-    A6, B6, C6, D6, E6, F6, G6, H6,
-    A7, B7, C7, D7, E7, F7, G7, H7,
-    A8, B8, C8, D8, E8, F8, G8, H8,
-] = range(64)
+A1: Square = 0
+B1: Square = 1
+C1: Square = 2
+D1: Square = 3
+E1: Square = 4
+F1: Square = 5
+G1: Square = 6
+H1: Square = 7
+A2: Square = 8
+B2: Square = 9
+C2: Square = 10
+D2: Square = 11
+E2: Square = 12
+F2: Square = 13
+G2: Square = 14
+H2: Square = 15
+A3: Square = 16
+B3: Square = 17
+C3: Square = 18
+D3: Square = 19
+E3: Square = 20
+F3: Square = 21
+G3: Square = 22
+H3: Square = 23
+A4: Square = 24
+B4: Square = 25
+C4: Square = 26
+D4: Square = 27
+E4: Square = 28
+F4: Square = 29
+G4: Square = 30
+H4: Square = 31
+A5: Square = 32
+B5: Square = 33
+C5: Square = 34
+D5: Square = 35
+E5: Square = 36
+F5: Square = 37
+G5: Square = 38
+H5: Square = 39
+A6: Square = 40
+B6: Square = 41
+C6: Square = 42
+D6: Square = 43
+E6: Square = 44
+F6: Square = 45
+G6: Square = 46
+H6: Square = 47
+A7: Square = 48
+B7: Square = 49
+C7: Square = 50
+D7: Square = 51
+E7: Square = 52
+F7: Square = 53
+G7: Square = 54
+H7: Square = 55
+A8: Square = 56
+B8: Square = 57
+C8: Square = 58
+D8: Square = 59
+E8: Square = 60
+F8: Square = 61
+G8: Square = 62
+H8: Square = 63
+SQUARES: List[Square] = list(range(64))
 
 SQUARE_NAMES = [f + r for r in RANK_NAMES for f in FILE_NAMES]
 
@@ -234,53 +297,106 @@ def square_mirror(square: Square) -> Square:
     """Mirrors the square vertically."""
     return square ^ 0x38
 
-SQUARES_180 = [square_mirror(sq) for sq in SQUARES]
+SQUARES_180: List[Square] = [square_mirror(sq) for sq in SQUARES]
 
 
 Bitboard: TypeAlias = int
-BB_EMPTY = 0
-BB_ALL = 0xffff_ffff_ffff_ffff
-
-BB_SQUARES = [
-    BB_A1, BB_B1, BB_C1, BB_D1, BB_E1, BB_F1, BB_G1, BB_H1,
-    BB_A2, BB_B2, BB_C2, BB_D2, BB_E2, BB_F2, BB_G2, BB_H2,
-    BB_A3, BB_B3, BB_C3, BB_D3, BB_E3, BB_F3, BB_G3, BB_H3,
-    BB_A4, BB_B4, BB_C4, BB_D4, BB_E4, BB_F4, BB_G4, BB_H4,
-    BB_A5, BB_B5, BB_C5, BB_D5, BB_E5, BB_F5, BB_G5, BB_H5,
-    BB_A6, BB_B6, BB_C6, BB_D6, BB_E6, BB_F6, BB_G6, BB_H6,
-    BB_A7, BB_B7, BB_C7, BB_D7, BB_E7, BB_F7, BB_G7, BB_H7,
-    BB_A8, BB_B8, BB_C8, BB_D8, BB_E8, BB_F8, BB_G8, BB_H8,
-] = [1 << sq for sq in SQUARES]
-
-BB_CORNERS = BB_A1 | BB_H1 | BB_A8 | BB_H8
-BB_CENTER = BB_D4 | BB_E4 | BB_D5 | BB_E5
-
-BB_LIGHT_SQUARES = 0x55aa_55aa_55aa_55aa
-BB_DARK_SQUARES = 0xaa55_aa55_aa55_aa55
-
-BB_FILES = [
-    BB_FILE_A,
-    BB_FILE_B,
-    BB_FILE_C,
-    BB_FILE_D,
-    BB_FILE_E,
-    BB_FILE_F,
-    BB_FILE_G,
-    BB_FILE_H,
-] = [0x0101_0101_0101_0101 << i for i in range(8)]
-
-BB_RANKS = [
-    BB_RANK_1,
-    BB_RANK_2,
-    BB_RANK_3,
-    BB_RANK_4,
-    BB_RANK_5,
-    BB_RANK_6,
-    BB_RANK_7,
-    BB_RANK_8,
-] = [0xff << (8 * i) for i in range(8)]
-
-BB_BACKRANKS = BB_RANK_1 | BB_RANK_8
+BB_EMPTY: Bitboard = 0
+BB_ALL: Bitboard = 0xffff_ffff_ffff_ffff
+
+BB_A1: Bitboard = 1 << A1
+BB_B1: Bitboard = 1 << B1
+BB_C1: Bitboard = 1 << C1
+BB_D1: Bitboard = 1 << D1
+BB_E1: Bitboard = 1 << E1
+BB_F1: Bitboard = 1 << F1
+BB_G1: Bitboard = 1 << G1
+BB_H1: Bitboard = 1 << H1
+BB_A2: Bitboard = 1 << A2
+BB_B2: Bitboard = 1 << B2
+BB_C2: Bitboard = 1 << C2
+BB_D2: Bitboard = 1 << D2
+BB_E2: Bitboard = 1 << E2
+BB_F2: Bitboard = 1 << F2
+BB_G2: Bitboard = 1 << G2
+BB_H2: Bitboard = 1 << H2
+BB_A3: Bitboard = 1 << A3
+BB_B3: Bitboard = 1 << B3
+BB_C3: Bitboard = 1 << C3
+BB_D3: Bitboard = 1 << D3
+BB_E3: Bitboard = 1 << E3
+BB_F3: Bitboard = 1 << F3
+BB_G3: Bitboard = 1 << G3
+BB_H3: Bitboard = 1 << H3
+BB_A4: Bitboard = 1 << A4
+BB_B4: Bitboard = 1 << B4
+BB_C4: Bitboard = 1 << C4
+BB_D4: Bitboard = 1 << D4
+BB_E4: Bitboard = 1 << E4
+BB_F4: Bitboard = 1 << F4
+BB_G4: Bitboard = 1 << G4
+BB_H4: Bitboard = 1 << H4
+BB_A5: Bitboard = 1 << A5
+BB_B5: Bitboard = 1 << B5
+BB_C5: Bitboard = 1 << C5
+BB_D5: Bitboard = 1 << D5
+BB_E5: Bitboard = 1 << E5
+BB_F5: Bitboard = 1 << F5
+BB_G5: Bitboard = 1 << G5
+BB_H5: Bitboard = 1 << H5
+BB_A6: Bitboard = 1 << A6
+BB_B6: Bitboard = 1 << B6
+BB_C6: Bitboard = 1 << C6
+BB_D6: Bitboard = 1 << D6
+BB_E6: Bitboard = 1 << E6
+BB_F6: Bitboard = 1 << F6
+BB_G6: Bitboard = 1 << G6
+BB_H6: Bitboard = 1 << H6
+BB_A7: Bitboard = 1 << A7
+BB_B7: Bitboard = 1 << B7
+BB_C7: Bitboard = 1 << C7
+BB_D7: Bitboard = 1 << D7
+BB_E7: Bitboard = 1 << E7
+BB_F7: Bitboard = 1 << F7
+BB_G7: Bitboard = 1 << G7
+BB_H7: Bitboard = 1 << H7
+BB_A8: Bitboard = 1 << A8
+BB_B8: Bitboard = 1 << B8
+BB_C8: Bitboard = 1 << C8
+BB_D8: Bitboard = 1 << D8
+BB_E8: Bitboard = 1 << E8
+BB_F8: Bitboard = 1 << F8
+BB_G8: Bitboard = 1 << G8
+BB_H8: Bitboard = 1 << H8
+BB_SQUARES: List[Bitboard] = [1 << sq for sq in SQUARES]
+
+BB_CORNERS: Bitboard = BB_A1 | BB_H1 | BB_A8 | BB_H8
+BB_CENTER: Bitboard = BB_D4 | BB_E4 | BB_D5 | BB_E5
+
+BB_LIGHT_SQUARES: Bitboard = 0x55aa_55aa_55aa_55aa
+BB_DARK_SQUARES: Bitboard = 0xaa55_aa55_aa55_aa55
+
+BB_FILE_A: Bitboard = 0x0101_0101_0101_0101 << 0
+BB_FILE_B: Bitboard = 0x0101_0101_0101_0101 << 1
+BB_FILE_C: Bitboard = 0x0101_0101_0101_0101 << 2
+BB_FILE_D: Bitboard = 0x0101_0101_0101_0101 << 3
+BB_FILE_E: Bitboard = 0x0101_0101_0101_0101 << 4
+BB_FILE_F: Bitboard = 0x0101_0101_0101_0101 << 5
+BB_FILE_G: Bitboard = 0x0101_0101_0101_0101 << 6
+BB_FILE_H: Bitboard = 0x0101_0101_0101_0101 << 7
+BB_FILES: List[Bitboard] = [BB_FILE_A, BB_FILE_B, BB_FILE_C, BB_FILE_D, BB_FILE_E, BB_FILE_F, BB_FILE_G, BB_FILE_H]
+
+BB_RANK_1: Bitboard = 0xff << (8 * 0)
+BB_RANK_2: Bitboard = 0xff << (8 * 1)
+BB_RANK_3: Bitboard = 0xff << (8 * 2)
+BB_RANK_4: Bitboard = 0xff << (8 * 3)
+BB_RANK_5: Bitboard = 0xff << (8 * 4)
+BB_RANK_6: Bitboard = 0xff << (8 * 5)
+BB_RANK_7: Bitboard = 0xff << (8 * 6)
+BB_RANK_8: Bitboard = 0xff << (8 * 7)
+BB_RANKS: List[Bitboard] = [BB_RANK_1, BB_RANK_2, BB_RANK_3, BB_RANK_4, BB_RANK_5, BB_RANK_6, BB_RANK_7, BB_RANK_8]
+
+BB_BACKRANKS: Bitboard = BB_RANK_1 | BB_RANK_8
 
 
 def lsb(bb: Bitboard) -> int:
@@ -397,9 +513,9 @@ def _sliding_attacks(square: Square, occupied: Bitboard, deltas: Iterable[int])
 def _step_attacks(square: Square, deltas: Iterable[int]) -> Bitboard:
     return _sliding_attacks(square, BB_ALL, deltas)
 
-BB_KNIGHT_ATTACKS = [_step_attacks(sq, [17, 15, 10, 6, -17, -15, -10, -6]) for sq in SQUARES]
-BB_KING_ATTACKS = [_step_attacks(sq, [9, 8, 7, 1, -9, -8, -7, -1]) for sq in SQUARES]
-BB_PAWN_ATTACKS = [[_step_attacks(sq, deltas) for sq in SQUARES] for deltas in [[-7, -9], [7, 9]]]
+BB_KNIGHT_ATTACKS: List[Bitboard] = [_step_attacks(sq, [17, 15, 10, 6, -17, -15, -10, -6]) for sq in SQUARES]
+BB_KING_ATTACKS: List[Bitboard] = [_step_attacks(sq, [9, 8, 7, 1, -9, -8, -7, -1]) for sq in SQUARES]
+BB_PAWN_ATTACKS: List[List[Bitboard]] = [[_step_attacks(sq, deltas) for sq in SQUARES] for deltas in [[-7, -9], [7, 9]]]
 
 
 def _edges(square: Square) -> Bitboard:

From 90d81da2416bf8e3f4ffdbdd70e6105fea8607b4 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sat, 20 Apr 2024 21:04:40 -0700
Subject: [PATCH 520/613] Restore previous behavior of GameNode.comment

GameNode.comment now returns all comments as a single string with single
spaces separating the comments.

GameNode.comments (plural) returns all comments as a list of strings.
---
 chess/pgn.py | 90 +++++++++++++++++++++++++++++++---------------------
 test.py      | 43 +++++++++++++++----------
 2 files changed, 80 insertions(+), 53 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 36cac2c59..50984a64d 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -290,8 +290,8 @@ class GameNode(abc.ABC):
     """
 
     @property
-    def comment(self) -> GameNodeComment:
-        return self._comment
+    def comment(self) -> str:
+        return " ".join(self._comment)
 
     @comment.setter
     def comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
@@ -300,11 +300,19 @@ def comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
         else:
             self._comment = GameNodeComment(new_comment)
 
+    @property
+    def comments(self) -> GameNodeComment:
+        return self._comment
+
+    @comments.setter
+    def comments(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
+        self.comment = new_comment
+
     _starting_comment: GameNodeComment
 
     @property
-    def starting_comment(self) -> GameNodeComment:
-        return self._starting_comment
+    def starting_comment(self) -> str:
+        return " ".join(self._starting_comment)
 
     @starting_comment.setter
     def starting_comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
@@ -313,6 +321,14 @@ def starting_comment(self, new_comment: Union[str, list[str], GameNodeComment])
         else:
             self._starting_comment = GameNodeComment(new_comment)
 
+    @property
+    def starting_comments(self) -> GameNodeComment:
+        return self._starting_comment
+
+    @starting_comments.setter
+    def starting_comments(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
+        self._starting_comment = new_comment
+
     nags: Set[int]
 
     def __init__(self, *, comment: Union[str, list[str]] = "") -> None:
@@ -539,7 +555,7 @@ def add_line(self, moves: Iterable[chess.Move], *, comment: Union[str, list[str]
             starting_comment = ""
 
         # Merge comment and NAGs.
-        node.comment.append(comment)
+        node.comments.append(comment)
         node.nags.update(nags)
 
         return node
@@ -551,7 +567,7 @@ def eval(self) -> Optional[chess.engine.PovScore]:
 
         Complexity is `O(n)`.
         """
-        match = EVAL_REGEX.search(" ".join(self.comment))
+        match = EVAL_REGEX.search(self.comment)
         if not match:
             return None
 
@@ -577,7 +593,7 @@ def eval_depth(self) -> Optional[int]:
 
         Complexity is `O(1)`.
         """
-        match = EVAL_REGEX.search(" ".join(self.comment))
+        match = EVAL_REGEX.search(self.comment)
         return int(match.group("depth")) if match and match.group("depth") else None
 
     def set_eval(self, score: Optional[chess.engine.PovScore], depth: Optional[int] = None) -> None:
@@ -595,15 +611,15 @@ def set_eval(self, score: Optional[chess.engine.PovScore], depth: Optional[int]
                 eval = f"[%eval #{score.white().mate()}{depth_suffix}]"
 
         found = 0
-        for index in range(len(self.comment)):
-            self.comment[index], found = EVAL_REGEX.subn(_condense_affix(eval), self.comment[index], count=1)
+        for index in range(len(self.comments)):
+            self.comments[index], found = EVAL_REGEX.subn(_condense_affix(eval), self.comments[index], count=1)
             if found:
                 break
 
-        self.comment.remove_empty()
+        self.comments.remove_empty()
 
         if not found and eval:
-            self.comment.append(eval)
+            self.comments.append(eval)
 
     def arrows(self) -> List[chess.svg.Arrow]:
         """
@@ -613,7 +629,7 @@ def arrows(self) -> List[chess.svg.Arrow]:
         Returns a list of :class:`arrows `.
         """
         arrows = []
-        for match in ARROWS_REGEX.finditer(" ".join(self.comment)):
+        for match in ARROWS_REGEX.finditer(self.comment):
             for group in match.group("arrows").split(","):
                 arrows.append(chess.svg.Arrow.from_pgn(group))
 
@@ -635,10 +651,10 @@ def set_arrows(self, arrows: Iterable[Union[chess.svg.Arrow, Tuple[Square, Squar
                 pass
             (csl if arrow.tail == arrow.head else cal).append(arrow.pgn())  # type: ignore
 
-        for index in range(len(self.comment)):
-            self.comment[index] = ARROWS_REGEX.sub(_condense_affix(""), self.comment[index])
+        for index in range(len(self.comments)):
+            self.comments[index] = ARROWS_REGEX.sub(_condense_affix(""), self.comments[index])
 
-        self.comment.remove_empty()
+        self.comments.remove_empty()
 
         prefix = ""
         if csl:
@@ -647,7 +663,7 @@ def set_arrows(self, arrows: Iterable[Union[chess.svg.Arrow, Tuple[Square, Squar
             prefix += f"[%cal {','.join(cal)}]"
 
         if prefix:
-            self.comment.insert(0, prefix)
+            self.comments.insert(0, prefix)
 
     def clock(self) -> Optional[float]:
         """
@@ -657,7 +673,7 @@ def clock(self) -> Optional[float]:
         Returns the player's remaining time to the next time control after this
         move, in seconds.
         """
-        match = CLOCK_REGEX.search(" ".join(self.comment))
+        match = CLOCK_REGEX.search(self.comment)
         if match is None:
             return None
         return int(match.group("hours")) * 3600 + int(match.group("minutes")) * 60 + float(match.group("seconds"))
@@ -677,15 +693,15 @@ def set_clock(self, seconds: Optional[float]) -> None:
             clk = f"[%clk {hours:d}:{minutes:02d}:{seconds_part}]"
 
         found = 0
-        for index in range(len(self.comment)):
-            self.comment[index], found = CLOCK_REGEX.subn(_condense_affix(clk), self.comment[index], count=1)
+        for index in range(len(self.comments)):
+            self.comments[index], found = CLOCK_REGEX.subn(_condense_affix(clk), self.comments[index], count=1)
             if found:
                 break
 
-        self.comment.remove_empty()
+        self.comments.remove_empty()
 
         if not found and clk:
-            self.comment.append(clk)
+            self.comments.append(clk)
 
     def emt(self) -> Optional[float]:
         """
@@ -695,7 +711,7 @@ def emt(self) -> Optional[float]:
         Returns the player's elapsed move time use for the comment of this
         move, in seconds.
         """
-        match = EMT_REGEX.search(" ".join(self.comment))
+        match = EMT_REGEX.search(" ".join(self.comments))
         if match is None:
             return None
         return int(match.group("hours")) * 3600 + int(match.group("minutes")) * 60 + float(match.group("seconds"))
@@ -715,15 +731,15 @@ def set_emt(self, seconds: Optional[float]) -> None:
             emt = f"[%emt {hours:d}:{minutes:02d}:{seconds_part}]"
 
         found = 0
-        for index in range(len(self.comment)):
-            self.comment[index], found = EMT_REGEX.subn(_condense_affix(emt), self.comment[index], count=1)
+        for index in range(len(self.comments)):
+            self.comments[index], found = EMT_REGEX.subn(_condense_affix(emt), self.comments[index], count=1)
             if found:
                 break
 
-        self.comment.remove_empty()
+        self.comments.remove_empty()
 
         if not found and emt:
-            self.comment.append(emt)
+            self.comments.append(emt)
 
     @abc.abstractmethod
     def accept(self, visitor: BaseVisitor[ResultT]) -> ResultT:
@@ -868,7 +884,7 @@ def end(self) -> ChildNode:
 
     def _accept_node(self, parent_board: chess.Board, visitor: BaseVisitor[ResultT]) -> None:
         if self.starting_comment:
-            visitor.visit_comment(self.starting_comment)
+            visitor.visit_comment(self.starting_comments)
 
         visitor.visit_move(parent_board, self.move)
 
@@ -879,8 +895,8 @@ def _accept_node(self, parent_board: chess.Board, visitor: BaseVisitor[ResultT])
         for nag in sorted(self.nags):
             visitor.visit_nag(nag)
 
-        if self.comment:
-            visitor.visit_comment(self.comment)
+        if self.comments:
+            visitor.visit_comment(self.comments)
 
     def _accept(self, parent_board: chess.Board, visitor: BaseVisitor[ResultT], *, sidelines: bool = True) -> None:
         stack = [_AcceptFrame(self, sidelines=sidelines)]
@@ -1011,8 +1027,8 @@ def accept(self, visitor: BaseVisitor[ResultT]) -> ResultT:
                 board = self.board()
                 visitor.visit_board(board)
 
-                if self.comment:
-                    visitor.visit_comment(self.comment)
+                if self.comments:
+                    visitor.visit_comment(self.comments)
 
                 if self.variations:
                     self.variations[0]._accept(board, visitor)
@@ -1347,14 +1363,14 @@ def visit_comment(self, comment: GameNodeComment) -> None:
             # Add as a comment for the current node if in the middle of
             # a variation. Add as a comment for the game if the comment
             # starts before any move.
-            new_comment = self.variation_stack[-1].comment + comment
-            new_comment.remove_empty()
-            self.variation_stack[-1].comment = new_comment
+            new_comments = self.variation_stack[-1].comments + comment
+            new_comments.remove_empty()
+            self.variation_stack[-1].comments = new_comments
         else:
             # Otherwise, it is a starting comment.
-            new_comment = self.starting_comment + comment
-            new_comment.remove_empty()
-            self.starting_comment = new_comment
+            new_comments = self.starting_comment + comment
+            new_comments.remove_empty()
+            self.starting_comment = new_comments
 
     def visit_move(self, board: chess.Board, move: chess.Move) -> None:
         self.variation_stack[-1] = self.variation_stack[-1].add_variation(move)
diff --git a/test.py b/test.py
index ee770de0f..aa89cd2c5 100755
--- a/test.py
+++ b/test.py
@@ -2220,19 +2220,24 @@ def test_read_game_with_multicomment_move(self):
         game = chess.pgn.read_game(pgn)
         first_move = game.variation(0)
         self.assertEqual(first_move.comment, "A common opening")
+        self.assertEqual(first_move.comments, "A common opening")
+        self.assertEqual(first_move.comments, ["A common opening"])
         second_move = first_move.variation(0)
-        self.assertEqual(second_move.comment, ["A common response", "An uncommon comment"])
-        second_move.comment.pop()
-        self.assertEqual(second_move.comment, ["A common response"])
+        self.assertEqual(second_move.comments, ["A common response", "An uncommon comment"])
+        second_move.comments.pop()
+        self.assertEqual(second_move.comments, ["A common response"])
+        self.assertEqual(second_move.comments, "A common response")
         self.assertEqual(second_move.comment, "A common response")
-        second_move.comment.append("A replaced comment")
+        second_move.comments.append("A replaced comment")
         multiple_comments = ["A common response", "A replaced comment"]
-        self.assertEqual(second_move.comment, multiple_comments)
-        for move_comment, test_comment in zip(second_move.comment, multiple_comments):
+        self.assertEqual(second_move.comments, multiple_comments)
+        for move_comment, test_comment in zip(second_move.comments, multiple_comments):
             self.assertEqual(move_comment, test_comment)
-        self.assertEqual(list(second_move.comment), multiple_comments)
-        second_move.comment.pop(0)
-        self.assertEqual(second_move.comment, ["A replaced comment"])
+        self.assertEqual(list(second_move.comments), multiple_comments)
+        self.assertEqual(second_move.comment, " ".join(multiple_comments))
+        second_move.comments.pop(0)
+        self.assertEqual(second_move.comments, ["A replaced comment"])
+        self.assertEqual(second_move.comments, "A replaced comment")
         self.assertEqual(second_move.comment, "A replaced comment")
 
     def test_comment_at_eol(self):
@@ -2845,22 +2850,24 @@ def test_annotations(self):
         self.assertTrue(game.clock() is None)
         clock = 12345
         game.set_clock(clock)
-        self.assertEqual(game.comment, ["foo [%bar] baz", "[%clk 3:25:45]"])
+        self.assertEqual(game.comment, "foo [%bar] baz [%clk 3:25:45]")
+        self.assertEqual(game.comments, ["foo [%bar] baz", "[%clk 3:25:45]"])
         self.assertEqual(game.clock(), clock)
 
         self.assertTrue(game.eval() is None)
         game.set_eval(chess.engine.PovScore(chess.engine.Cp(-80), chess.WHITE))
-        self.assertEqual(game.comment, ["foo [%bar] baz", "[%clk 3:25:45]", "[%eval -0.80]"])
+        self.assertEqual(game.comments, ["foo [%bar] baz", "[%clk 3:25:45]", "[%eval -0.80]"])
         self.assertEqual(game.eval().white().score(), -80)
         self.assertEqual(game.eval_depth(), None)
         game.set_eval(chess.engine.PovScore(chess.engine.Mate(1), chess.WHITE), 5)
-        self.assertEqual(game.comment, ["foo [%bar] baz", "[%clk 3:25:45]", "[%eval #1,5]"])
+        self.assertEqual(game.comments, ["foo [%bar] baz", "[%clk 3:25:45]", "[%eval #1,5]"])
         self.assertEqual(game.eval().white().mate(), 1)
         self.assertEqual(game.eval_depth(), 5)
 
         self.assertEqual(game.arrows(), [])
         game.set_arrows([(chess.A1, chess.A1), chess.svg.Arrow(chess.A1, chess.H1, color="red"), chess.svg.Arrow(chess.B1, chess.B8)])
-        self.assertEqual(game.comment, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]", "[%eval #1,5]"])
+        self.assertEqual(game.comments, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]", "[%eval #1,5]"])
+        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%eval #1,5]")
         arrows = game.arrows()
         self.assertEqual(len(arrows), 3)
         self.assertEqual(arrows[0].color, "green")
@@ -2870,17 +2877,21 @@ def test_annotations(self):
         self.assertTrue(game.emt() is None)
         emt = 321
         game.set_emt(emt)
-        self.assertEqual(game.comment, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]", "[%eval #1,5]", "[%emt 0:05:21]"])
+        self.assertEqual(game.comments, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]", "[%eval #1,5]", "[%emt 0:05:21]"])
+        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%eval #1,5] [%emt 0:05:21]")
         self.assertEqual(game.emt(), emt)
 
         game.set_eval(None)
-        self.assertEqual(game.comment, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]", "[%emt 0:05:21]"])
+        self.assertEqual(game.comments, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]", "[%emt 0:05:21]"])
+        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%emt 0:05:21]")
 
         game.set_emt(None)
-        self.assertEqual(game.comment, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]"])
+        self.assertEqual(game.comments, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]"])
+        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45]")
 
         game.set_clock(None)
         game.set_arrows([])
+        self.assertEqual(game.comments, "foo [%bar] baz")
         self.assertEqual(game.comment, "foo [%bar] baz")
 
     def test_eval(self):

From 2761d7c2b129bb5c88b3ff59c2dbbc792863b172 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sat, 20 Apr 2024 21:16:52 -0700
Subject: [PATCH 521/613] Fix typing errors

---
 chess/pgn.py | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 50984a64d..c70c47bc2 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -306,7 +306,10 @@ def comments(self) -> GameNodeComment:
 
     @comments.setter
     def comments(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
-        self.comment = new_comment
+        if isinstance(new_comment, GameNodeComment):
+            self._comment = new_comment
+        else:
+            self._comment = GameNodeComment(new_comment)
 
     _starting_comment: GameNodeComment
 
@@ -327,7 +330,10 @@ def starting_comments(self) -> GameNodeComment:
 
     @starting_comments.setter
     def starting_comments(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
-        self._starting_comment = new_comment
+        if isinstance(new_comment, GameNodeComment):
+            self._starting_comment = new_comment
+        else:
+            self._starting_comment = GameNodeComment(new_comment)
 
     nags: Set[int]
 
@@ -335,11 +341,11 @@ def __init__(self, *, comment: Union[str, list[str]] = "") -> None:
         self.parent = None
         self.move = None
         self.variations = []
-        self.comment = GameNodeComment(comment)
+        self.comments = GameNodeComment(comment)
 
         # Deprecated: These should be properties of ChildNode, but need to
         # remain here for backwards compatibility.
-        self.starting_comment = GameNodeComment()
+        self.starting_comments = GameNodeComment()
         self.nags = set()
 
     @abc.abstractmethod
@@ -804,8 +810,8 @@ class ChildNode(GameNode):
     """
 
     @property
-    def starting_comment(self) -> GameNodeComment:
-        return self._starting_comment
+    def starting_comment(self) -> str:
+        return " ".join(self._starting_comment)
 
     @starting_comment.setter
     def starting_comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
@@ -827,7 +833,7 @@ def __init__(self, parent: GameNode, move: chess.Move, *, comment: Union[str, li
         self.parent.variations.append(self)
 
         self.nags.update(nags)
-        self.starting_comment = GameNodeComment(starting_comment)
+        self.starting_comments = GameNodeComment(starting_comment)
 
     def board(self) -> chess.Board:
         stack: List[chess.Move] = []
@@ -1374,7 +1380,7 @@ def visit_comment(self, comment: GameNodeComment) -> None:
 
     def visit_move(self, board: chess.Board, move: chess.Move) -> None:
         self.variation_stack[-1] = self.variation_stack[-1].add_variation(move)
-        self.variation_stack[-1].starting_comment = self.starting_comment
+        self.variation_stack[-1].starting_comments = self.starting_comment
         self.starting_comment = GameNodeComment()
         self.in_variation = True
 

From f0baba73ba034d48cb734bf4c0848417396a633f Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sat, 20 Apr 2024 21:22:56 -0700
Subject: [PATCH 522/613] Consolidate repeated logic

---
 chess/pgn.py | 29 +++++++----------------------
 1 file changed, 7 insertions(+), 22 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index c70c47bc2..6ff13fd7e 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -191,9 +191,9 @@ class GameNodeComment:
     A class that can hold one or more comments for a GameNode.
     """
 
-    def __init__(self, comment: Union[str, list[str]] = ""):
+    def __init__(self, comment: Union[str, list[str], GameNodeComment] = ""):
         """Create a new comment."""
-        self.set(comment)
+        self.set(comment._comments if isinstance(comment,GameNodeComment) else comment)
 
     def set(self, new_comment: Union[str, list[str]]) -> None:
         """Replace the comment with a new comment or a list of comments."""
@@ -295,10 +295,7 @@ def comment(self) -> str:
 
     @comment.setter
     def comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
-        if isinstance(new_comment, GameNodeComment):
-            self._comment = new_comment
-        else:
-            self._comment = GameNodeComment(new_comment)
+        self._comment = GameNodeComment(new_comment)
 
     @property
     def comments(self) -> GameNodeComment:
@@ -306,10 +303,7 @@ def comments(self) -> GameNodeComment:
 
     @comments.setter
     def comments(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
-        if isinstance(new_comment, GameNodeComment):
-            self._comment = new_comment
-        else:
-            self._comment = GameNodeComment(new_comment)
+        self._comment = GameNodeComment(new_comment)
 
     _starting_comment: GameNodeComment
 
@@ -319,10 +313,7 @@ def starting_comment(self) -> str:
 
     @starting_comment.setter
     def starting_comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
-        if isinstance(new_comment, GameNodeComment):
-            self._starting_comment = new_comment
-        else:
-            self._starting_comment = GameNodeComment(new_comment)
+        self._starting_comment = GameNodeComment(new_comment)
 
     @property
     def starting_comments(self) -> GameNodeComment:
@@ -330,10 +321,7 @@ def starting_comments(self) -> GameNodeComment:
 
     @starting_comments.setter
     def starting_comments(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
-        if isinstance(new_comment, GameNodeComment):
-            self._starting_comment = new_comment
-        else:
-            self._starting_comment = GameNodeComment(new_comment)
+        self._starting_comment = GameNodeComment(new_comment)
 
     nags: Set[int]
 
@@ -815,10 +803,7 @@ def starting_comment(self) -> str:
 
     @starting_comment.setter
     def starting_comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
-        if isinstance(new_comment, GameNodeComment):
-            self._starting_comment = new_comment
-        else:
-            self._starting_comment = GameNodeComment(new_comment)
+        self._starting_comment = GameNodeComment(new_comment)
 
     nags: Set[int]
     """

From f840f8e58e635d89ba810ffa08cb0f81d4925f79 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sun, 21 Apr 2024 19:27:56 -0700
Subject: [PATCH 523/613] Revert unneeded code change

---
 chess/pgn.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 6ff13fd7e..e462a0750 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -705,7 +705,7 @@ def emt(self) -> Optional[float]:
         Returns the player's elapsed move time use for the comment of this
         move, in seconds.
         """
-        match = EMT_REGEX.search(" ".join(self.comments))
+        match = EMT_REGEX.search(self.comment)
         if match is None:
             return None
         return int(match.group("hours")) * 3600 + int(match.group("minutes")) * 60 + float(match.group("seconds"))

From 716a0b9459480b852b5169a0f1b0b3dbecd3be31 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 4 May 2024 17:44:20 +0200
Subject: [PATCH 524/613] Require that EPD opcodes start with letter (fixes
 #1080)

---
 chess/__init__.py | 16 +++++++++++++---
 test.py           |  5 +++++
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index f9a9ab7f5..bed9eec5d 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -2739,9 +2739,7 @@ def _epd_operations(self, operations: Mapping[str, Union[None, str, int, float,
         first_op = True
 
         for opcode, operand in operations.items():
-            assert opcode != "-", "dash (-) is not a valid epd opcode"
-            for blacklisted in [" ", "\n", "\t", "\r"]:
-                assert blacklisted not in opcode, f"invalid character {blacklisted!r} in epd opcode: {opcode!r}"
+            self._validate_epd_opcode(opcode)
 
             if not first_op:
                 epd.append(" ")
@@ -2819,6 +2817,17 @@ def epd(self, *, shredder: bool = False, en_passant: EnPassantSpec = "legal", pr
 
         return " ".join(epd)
 
+    def _validate_epd_opcode(self, opcode: str) -> None:
+        if not opcode:
+            raise ValueError("empty string is not a valid epd opcode")
+        if opcode == "-":
+            raise ValueError("dash (-) is not a valid epd opcode")
+        if not opcode[0].isalpha():
+            raise ValueError(f"expected epd opcode to start with a letter, got: {opcode!r}")
+        for blacklisted in [" ", "\n", "\t", "\r"]:
+            if blacklisted in opcode:
+                raise ValueError(f"invalid character {blacklisted!r} in epd opcode: {opcode!r}")
+
     def _parse_epd_ops(self: BoardT, operation_part: str, make_board: Callable[[], BoardT]) -> Dict[str, Union[None, str, int, float, Move, List[Move]]]:
         operations: Dict[str, Union[None, str, int, float, Move, List[Move]]] = {}
         state = "opcode"
@@ -2832,6 +2841,7 @@ def _parse_epd_ops(self: BoardT, operation_part: str, make_board: Callable[[], B
                     if opcode == "-":
                         opcode = ""
                     elif opcode:
+                        self._validate_epd_opcode(opcode)
                         state = "after_opcode"
                 elif ch is None or ch == ";":
                     if opcode == "-":
diff --git a/test.py b/test.py
index 8dbc95a25..4ca3be6c2 100755
--- a/test.py
+++ b/test.py
@@ -1143,6 +1143,11 @@ def test_eret_epd(self):
         self.assertEqual(ops["id"], "ERET 001 - Entlastung")
         self.assertEqual(ops["bm"], [chess.Move.from_uci("f1f4")])
 
+    def test_set_fen_as_epd(self):
+        board = chess.Board()
+        with self.assertRaises(ValueError):
+            board.set_epd(board.fen())  # Move numbers are not valid opcodes
+
     def test_null_moves(self):
         self.assertEqual(str(chess.Move.null()), "0000")
         self.assertEqual(chess.Move.null().uci(), "0000")

From df714e39a559135c51228cca6a7cb5c716756ee3 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 4 May 2024 17:59:31 +0200
Subject: [PATCH 525/613] Fixup invalid EPDs in chess960.perft file

---
 examples/perft/chess960.perft | 1920 ++++++++++++++++-----------------
 1 file changed, 960 insertions(+), 960 deletions(-)

diff --git a/examples/perft/chess960.perft b/examples/perft/chess960.perft
index 76be26eed..12276f256 100644
--- a/examples/perft/chess960.perft
+++ b/examples/perft/chess960.perft
@@ -2,7 +2,7 @@
 # https://github.com/AndyGrant/Ethereal/blob/master/src/perft/fischer.epd
 
 id 0
-epd bqnb1rkr/pp3ppp/3ppn2/2p5/5P2/P2P4/NPP1P1PP/BQ1BNRKR w HFhf - 2 9
+epd bqnb1rkr/pp3ppp/3ppn2/2p5/5P2/P2P4/NPP1P1PP/BQ1BNRKR w HFhf -
 perft 1 21
 perft 2 528
 perft 3 12189
@@ -11,7 +11,7 @@ perft 5 8146062
 perft 6 227689589
 
 id 1
-epd 2nnrbkr/p1qppppp/8/1ppb4/6PP/3PP3/PPP2P2/BQNNRBKR w HEhe - 1 9
+epd 2nnrbkr/p1qppppp/8/1ppb4/6PP/3PP3/PPP2P2/BQNNRBKR w HEhe -
 perft 1 21
 perft 2 807
 perft 3 18002
@@ -20,7 +20,7 @@ perft 5 16253601
 perft 6 590751109
 
 id 2
-epd b1q1rrkb/pppppppp/3nn3/8/P7/1PPP4/4PPPP/BQNNRKRB w GE - 1 9
+epd b1q1rrkb/pppppppp/3nn3/8/P7/1PPP4/4PPPP/BQNNRKRB w GE -
 perft 1 20
 perft 2 479
 perft 3 10471
@@ -29,7 +29,7 @@ perft 5 6417013
 perft 6 177654692
 
 id 3
-epd qbbnnrkr/2pp2pp/p7/1p2pp2/8/P3PP2/1PPP1KPP/QBBNNR1R w hf - 0 9
+epd qbbnnrkr/2pp2pp/p7/1p2pp2/8/P3PP2/1PPP1KPP/QBBNNR1R w hf -
 perft 1 22
 perft 2 593
 perft 3 13440
@@ -38,7 +38,7 @@ perft 5 9183776
 perft 6 274103539
 
 id 4
-epd 1nbbnrkr/p1p1ppp1/3p4/1p3P1p/3Pq2P/8/PPP1P1P1/QNBBNRKR w HFhf - 0 9
+epd 1nbbnrkr/p1p1ppp1/3p4/1p3P1p/3Pq2P/8/PPP1P1P1/QNBBNRKR w HFhf -
 perft 1 28
 perft 2 1120
 perft 3 31058
@@ -47,7 +47,7 @@ perft 5 34030312
 perft 6 1250970898
 
 id 5
-epd qnbnr1kr/ppp1b1pp/4p3/3p1p2/8/2NPP3/PPP1BPPP/QNB1R1KR w HEhe - 1 9
+epd qnbnr1kr/ppp1b1pp/4p3/3p1p2/8/2NPP3/PPP1BPPP/QNB1R1KR w HEhe -
 perft 1 29
 perft 2 899
 perft 3 26578
@@ -56,7 +56,7 @@ perft 5 24851983
 perft 6 775718317
 
 id 6
-epd q1bnrkr1/ppppp2p/2n2p2/4b1p1/2NP4/8/PPP1PPPP/QNB1RRKB w ge - 1 9
+epd q1bnrkr1/ppppp2p/2n2p2/4b1p1/2NP4/8/PPP1PPPP/QNB1RRKB w ge -
 perft 1 30
 perft 2 860
 perft 3 24566
@@ -65,7 +65,7 @@ perft 5 21093346
 perft 6 649209803
 
 id 7
-epd qbn1brkr/ppp1p1p1/2n4p/3p1p2/P7/6PP/QPPPPP2/1BNNBRKR w HFhf - 0 9
+epd qbn1brkr/ppp1p1p1/2n4p/3p1p2/P7/6PP/QPPPPP2/1BNNBRKR w HFhf -
 perft 1 25
 perft 2 635
 perft 3 17054
@@ -74,7 +74,7 @@ perft 5 13203304
 perft 6 377184252
 
 id 8
-epd qnnbbrkr/1p2ppp1/2pp3p/p7/1P5P/2NP4/P1P1PPP1/Q1NBBRKR w HFhf - 0 9
+epd qnnbbrkr/1p2ppp1/2pp3p/p7/1P5P/2NP4/P1P1PPP1/Q1NBBRKR w HFhf -
 perft 1 24
 perft 2 572
 perft 3 15243
@@ -83,7 +83,7 @@ perft 5 11110203
 perft 6 293989890
 
 id 9
-epd qn1rbbkr/ppp2p1p/1n1pp1p1/8/3P4/P6P/1PP1PPPK/QNNRBB1R w hd - 2 9
+epd qn1rbbkr/ppp2p1p/1n1pp1p1/8/3P4/P6P/1PP1PPPK/QNNRBB1R w hd -
 perft 1 28
 perft 2 811
 perft 3 23175
@@ -92,7 +92,7 @@ perft 5 19836606
 perft 6 594527992
 
 id 10
-epd qnr1bkrb/pppp2pp/3np3/5p2/8/P2P2P1/NPP1PP1P/QN1RBKRB w GDg - 3 9
+epd qnr1bkrb/pppp2pp/3np3/5p2/8/P2P2P1/NPP1PP1P/QN1RBKRB w GDg -
 perft 1 33
 perft 2 823
 perft 3 26895
@@ -101,7 +101,7 @@ perft 5 23114629
 perft 6 646390782
 
 id 11
-epd qb1nrkbr/1pppp1p1/1n3p2/p1B4p/8/3P1P1P/PPP1P1P1/QBNNRK1R w HEhe - 0 9
+epd qb1nrkbr/1pppp1p1/1n3p2/p1B4p/8/3P1P1P/PPP1P1P1/QBNNRK1R w HEhe -
 perft 1 31
 perft 2 855
 perft 3 25620
@@ -110,7 +110,7 @@ perft 5 21796206
 perft 6 651054626
 
 id 12
-epd qnnbrk1r/1p1ppbpp/2p5/p4p2/2NP3P/8/PPP1PPP1/Q1NBRKBR w HEhe - 0 9
+epd qnnbrk1r/1p1ppbpp/2p5/p4p2/2NP3P/8/PPP1PPP1/Q1NBRKBR w HEhe -
 perft 1 26
 perft 2 790
 perft 3 21238
@@ -119,7 +119,7 @@ perft 5 17819770
 perft 6 544866674
 
 id 13
-epd 1qnrkbbr/1pppppp1/p1n4p/8/P7/1P1N1P2/2PPP1PP/QN1RKBBR w HDhd - 0 9
+epd 1qnrkbbr/1pppppp1/p1n4p/8/P7/1P1N1P2/2PPP1PP/QN1RKBBR w HDhd -
 perft 1 37
 perft 2 883
 perft 3 32187
@@ -128,7 +128,7 @@ perft 5 29370838
 perft 6 783201510
 
 id 14
-epd qn1rkrbb/pp1p1ppp/2p1p3/3n4/4P2P/2NP4/PPP2PP1/Q1NRKRBB w FDfd - 1 9
+epd qn1rkrbb/pp1p1ppp/2p1p3/3n4/4P2P/2NP4/PPP2PP1/Q1NRKRBB w FDfd -
 perft 1 24
 perft 2 585
 perft 3 14769
@@ -137,7 +137,7 @@ perft 5 9482310
 perft 6 233468620
 
 id 15
-epd bb1qnrkr/pp1p1pp1/1np1p3/4N2p/8/1P4P1/P1PPPP1P/BBNQ1RKR w HFhf - 0 9
+epd bb1qnrkr/pp1p1pp1/1np1p3/4N2p/8/1P4P1/P1PPPP1P/BBNQ1RKR w HFhf -
 perft 1 29
 perft 2 864
 perft 3 25747
@@ -146,7 +146,7 @@ perft 5 24219627
 perft 6 776836316
 
 id 16
-epd bnqbnr1r/p1p1ppkp/3p4/1p4p1/P7/3NP2P/1PPP1PP1/BNQB1RKR w HF - 0 9
+epd bnqbnr1r/p1p1ppkp/3p4/1p4p1/P7/3NP2P/1PPP1PP1/BNQB1RKR w HF -
 perft 1 26
 perft 2 889
 perft 3 24353
@@ -155,7 +155,7 @@ perft 5 23701014
 perft 6 809194268
 
 id 17
-epd bnqnrbkr/1pp2pp1/p7/3pP2p/4P1P1/8/PPPP3P/BNQNRBKR w HEhe d6 0 9
+epd bnqnrbkr/1pp2pp1/p7/3pP2p/4P1P1/8/PPPP3P/BNQNRBKR w HEhe d6
 perft 1 31
 perft 2 984
 perft 3 28677
@@ -164,7 +164,7 @@ perft 5 29032175
 perft 6 1008880643
 
 id 18
-epd b1qnrrkb/ppp1pp1p/n2p1Pp1/8/8/P7/1PPPP1PP/BNQNRKRB w GE - 0 9
+epd b1qnrrkb/ppp1pp1p/n2p1Pp1/8/8/P7/1PPPP1PP/BNQNRKRB w GE -
 perft 1 20
 perft 2 484
 perft 3 10532
@@ -173,7 +173,7 @@ perft 5 6718715
 perft 6 193594729
 
 id 19
-epd n1bqnrkr/pp1ppp1p/2p5/6p1/2P2b2/PN6/1PNPPPPP/1BBQ1RKR w HFhf - 2 9
+epd n1bqnrkr/pp1ppp1p/2p5/6p1/2P2b2/PN6/1PNPPPPP/1BBQ1RKR w HFhf -
 perft 1 23
 perft 2 732
 perft 3 17746
@@ -182,7 +182,7 @@ perft 5 14481581
 perft 6 457140569
 
 id 20
-epd n1bb1rkr/qpnppppp/2p5/p7/P1P5/5P2/1P1PPRPP/NQBBN1KR w Hhf - 1 9
+epd n1bb1rkr/qpnppppp/2p5/p7/P1P5/5P2/1P1PPRPP/NQBBN1KR w Hhf -
 perft 1 27
 perft 2 697
 perft 3 18724
@@ -191,7 +191,7 @@ perft 5 14226907
 perft 6 400942568
 
 id 21
-epd nqb1rbkr/pppppp1p/4n3/6p1/4P3/1NP4P/PP1P1PP1/1QBNRBKR w HEhe - 1 9
+epd nqb1rbkr/pppppp1p/4n3/6p1/4P3/1NP4P/PP1P1PP1/1QBNRBKR w HEhe -
 perft 1 28
 perft 2 641
 perft 3 18811
@@ -200,7 +200,7 @@ perft 5 13780398
 perft 6 354122358
 
 id 22
-epd n1bnrrkb/pp1pp2p/2p2p2/6p1/5B2/3P4/PPP1PPPP/NQ1NRKRB w GE - 2 9
+epd n1bnrrkb/pp1pp2p/2p2p2/6p1/5B2/3P4/PPP1PPPP/NQ1NRKRB w GE -
 perft 1 28
 perft 2 606
 perft 3 16883
@@ -209,7 +209,7 @@ perft 5 10815324
 perft 6 254026570
 
 id 23
-epd nbqnbrkr/2ppp1p1/pp3p1p/8/4N2P/1N6/PPPPPPP1/1BQ1BRKR w HFhf - 0 9
+epd nbqnbrkr/2ppp1p1/pp3p1p/8/4N2P/1N6/PPPPPPP1/1BQ1BRKR w HFhf -
 perft 1 26
 perft 2 626
 perft 3 17268
@@ -218,7 +218,7 @@ perft 5 12719546
 perft 6 339132046
 
 id 24
-epd nq1bbrkr/pp2nppp/2pp4/4p3/1PP1P3/1B6/P2P1PPP/NQN1BRKR w HFhf - 2 9
+epd nq1bbrkr/pp2nppp/2pp4/4p3/1PP1P3/1B6/P2P1PPP/NQN1BRKR w HFhf -
 perft 1 21
 perft 2 504
 perft 3 11812
@@ -227,7 +227,7 @@ perft 5 7697880
 perft 6 207028745
 
 id 25
-epd nqnrb1kr/2pp1ppp/1p1bp3/p1B5/5P2/3N4/PPPPP1PP/NQ1R1BKR w HDhd - 0 9
+epd nqnrb1kr/2pp1ppp/1p1bp3/p1B5/5P2/3N4/PPPPP1PP/NQ1R1BKR w HDhd -
 perft 1 30
 perft 2 672
 perft 3 19307
@@ -236,7 +236,7 @@ perft 5 13454573
 perft 6 345445468
 
 id 26
-epd nqn2krb/p1prpppp/1pbp4/7P/5P2/8/PPPPPKP1/NQNRB1RB w g - 3 9
+epd nqn2krb/p1prpppp/1pbp4/7P/5P2/8/PPPPPKP1/NQNRB1RB w g -
 perft 1 21
 perft 2 461
 perft 3 10608
@@ -245,7 +245,7 @@ perft 5 6194124
 perft 6 152861936
 
 id 27
-epd nb1n1kbr/ppp1rppp/3pq3/P3p3/8/4P3/1PPPRPPP/NBQN1KBR w Hh - 1 9
+epd nb1n1kbr/ppp1rppp/3pq3/P3p3/8/4P3/1PPPRPPP/NBQN1KBR w Hh -
 perft 1 19
 perft 2 566
 perft 3 11786
@@ -254,7 +254,7 @@ perft 5 8047916
 perft 6 249171636
 
 id 28
-epd nqnbrkbr/1ppppp1p/p7/6p1/6P1/P6P/1PPPPP2/NQNBRKBR w HEhe - 1 9
+epd nqnbrkbr/1ppppp1p/p7/6p1/6P1/P6P/1PPPPP2/NQNBRKBR w HEhe -
 perft 1 20
 perft 2 382
 perft 3 8694
@@ -263,7 +263,7 @@ perft 5 4708975
 perft 6 112278808
 
 id 29
-epd nq1rkb1r/pp1pp1pp/1n2bp1B/2p5/8/5P1P/PPPPP1P1/NQNRKB1R w HDhd - 2 9
+epd nq1rkb1r/pp1pp1pp/1n2bp1B/2p5/8/5P1P/PPPPP1P1/NQNRKB1R w HDhd -
 perft 1 24
 perft 2 809
 perft 3 20090
@@ -272,7 +272,7 @@ perft 5 17647882
 perft 6 593457788
 
 id 30
-epd nqnrkrb1/pppppp2/7p/4b1p1/8/PN1NP3/1PPP1PPP/1Q1RKRBB w FDfd - 1 9
+epd nqnrkrb1/pppppp2/7p/4b1p1/8/PN1NP3/1PPP1PPP/1Q1RKRBB w FDfd -
 perft 1 26
 perft 2 683
 perft 3 18102
@@ -281,7 +281,7 @@ perft 5 13055173
 perft 6 352398011
 
 id 31
-epd bb1nqrkr/1pp1ppp1/pn5p/3p4/8/P2NNP2/1PPPP1PP/BB2QRKR w HFhf - 0 9
+epd bb1nqrkr/1pp1ppp1/pn5p/3p4/8/P2NNP2/1PPPP1PP/BB2QRKR w HFhf -
 perft 1 29
 perft 2 695
 perft 3 21193
@@ -290,7 +290,7 @@ perft 5 17454857
 perft 6 483785639
 
 id 32
-epd bnn1qrkr/pp1ppp1p/2p5/b3Q1p1/8/5P1P/PPPPP1P1/BNNB1RKR w HFhf - 2 9
+epd bnn1qrkr/pp1ppp1p/2p5/b3Q1p1/8/5P1P/PPPPP1P1/BNNB1RKR w HFhf -
 perft 1 44
 perft 2 920
 perft 3 35830
@@ -299,7 +299,7 @@ perft 5 29742670
 perft 6 702867204
 
 id 33
-epd bnnqrbkr/pp1p2p1/2p1p2p/5p2/1P5P/1R6/P1PPPPP1/BNNQRBK1 w Ehe - 0 9
+epd bnnqrbkr/pp1p2p1/2p1p2p/5p2/1P5P/1R6/P1PPPPP1/BNNQRBK1 w Ehe -
 perft 1 33
 perft 2 1022
 perft 3 32724
@@ -308,7 +308,7 @@ perft 5 32898113
 perft 6 1047360456
 
 id 34
-epd b1nqrkrb/2pppppp/p7/1P6/1n6/P4P2/1P1PP1PP/BNNQRKRB w GEge - 0 9
+epd b1nqrkrb/2pppppp/p7/1P6/1n6/P4P2/1P1PP1PP/BNNQRKRB w GEge -
 perft 1 23
 perft 2 638
 perft 3 15744
@@ -317,7 +317,7 @@ perft 5 11735969
 perft 6 344211589
 
 id 35
-epd n1bnqrkr/3ppppp/1p6/pNp1b3/2P3P1/8/PP1PPP1P/NBB1QRKR w HFhf - 1 9
+epd n1bnqrkr/3ppppp/1p6/pNp1b3/2P3P1/8/PP1PPP1P/NBB1QRKR w HFhf -
 perft 1 29
 perft 2 728
 perft 3 20768
@@ -326,7 +326,7 @@ perft 5 15621236
 perft 6 415766465
 
 id 36
-epd n2bqrkr/p1p1pppp/1pn5/3p1b2/P6P/1NP5/1P1PPPP1/1NBBQRKR w HFhf - 3 9
+epd n2bqrkr/p1p1pppp/1pn5/3p1b2/P6P/1NP5/1P1PPPP1/1NBBQRKR w HFhf -
 perft 1 20
 perft 2 533
 perft 3 12152
@@ -335,7 +335,7 @@ perft 5 8088751
 perft 6 223068417
 
 id 37
-epd nnbqrbkr/1pp1p1p1/p2p4/5p1p/2P1P3/N7/PPQP1PPP/N1B1RBKR w HEhe - 0 9
+epd nnbqrbkr/1pp1p1p1/p2p4/5p1p/2P1P3/N7/PPQP1PPP/N1B1RBKR w HEhe -
 perft 1 27
 perft 2 619
 perft 3 18098
@@ -344,7 +344,7 @@ perft 5 13755384
 perft 6 357222394
 
 id 38
-epd nnbqrkr1/pp1pp2p/2p2b2/5pp1/1P5P/4P1P1/P1PP1P2/NNBQRKRB w GEge - 1 9
+epd nnbqrkr1/pp1pp2p/2p2b2/5pp1/1P5P/4P1P1/P1PP1P2/NNBQRKRB w GEge -
 perft 1 32
 perft 2 1046
 perft 3 33721
@@ -353,7 +353,7 @@ perft 5 36218182
 perft 6 1202830851
 
 id 39
-epd nb1qbrkr/p1pppp2/1p1n2pp/8/1P6/2PN3P/P2PPPP1/NB1QBRKR w HFhf - 0 9
+epd nb1qbrkr/p1pppp2/1p1n2pp/8/1P6/2PN3P/P2PPPP1/NB1QBRKR w HFhf -
 perft 1 25
 perft 2 521
 perft 3 14021
@@ -362,7 +362,7 @@ perft 5 8697700
 perft 6 201455191
 
 id 40
-epd nnq1brkr/pp1pppp1/8/2p4P/8/5K2/PPPbPP1P/NNQBBR1R w hf - 0 9
+epd nnq1brkr/pp1pppp1/8/2p4P/8/5K2/PPPbPP1P/NNQBBR1R w hf -
 perft 1 23
 perft 2 724
 perft 3 18263
@@ -371,7 +371,7 @@ perft 5 15338230
 perft 6 484638597
 
 id 41
-epd nnqrbb1r/pppppk2/5pp1/7p/1P6/3P2PP/P1P1PP2/NNQRBBKR w HD - 0 9
+epd nnqrbb1r/pppppk2/5pp1/7p/1P6/3P2PP/P1P1PP2/NNQRBBKR w HD -
 perft 1 30
 perft 2 717
 perft 3 21945
@@ -380,7 +380,7 @@ perft 5 17166700
 perft 6 450069742
 
 id 42
-epd nnqr1krb/p1p1pppp/2bp4/8/1p1P4/4P3/PPP2PPP/NNQRBKRB w GDgd - 0 9
+epd nnqr1krb/p1p1pppp/2bp4/8/1p1P4/4P3/PPP2PPP/NNQRBKRB w GDgd -
 perft 1 25
 perft 2 873
 perft 3 20796
@@ -389,7 +389,7 @@ perft 5 18162741
 perft 6 641708630
 
 id 43
-epd nbnqrkbr/p2ppp2/1p4p1/2p4p/3P3P/3N4/PPP1PPPR/NB1QRKB1 w Ehe - 0 9
+epd nbnqrkbr/p2ppp2/1p4p1/2p4p/3P3P/3N4/PPP1PPPR/NB1QRKB1 w Ehe -
 perft 1 24
 perft 2 589
 perft 3 15190
@@ -398,7 +398,7 @@ perft 5 10630667
 perft 6 279474189
 
 id 44
-epd n1qbrkbr/p1ppp2p/2n2pp1/1p6/1P6/2P3P1/P2PPP1P/NNQBRKBR w HEhe - 0 9
+epd n1qbrkbr/p1ppp2p/2n2pp1/1p6/1P6/2P3P1/P2PPP1P/NNQBRKBR w HEhe -
 perft 1 22
 perft 2 592
 perft 3 14269
@@ -407,7 +407,7 @@ perft 5 10356818
 perft 6 301583306
 
 id 45
-epd 2qrkbbr/ppn1pppp/n1p5/3p4/5P2/P1PP4/1P2P1PP/NNQRKBBR w HDhd - 1 9
+epd 2qrkbbr/ppn1pppp/n1p5/3p4/5P2/P1PP4/1P2P1PP/NNQRKBBR w HDhd -
 perft 1 27
 perft 2 750
 perft 3 20584
@@ -416,7 +416,7 @@ perft 5 16819085
 perft 6 516796736
 
 id 46
-epd 1nqr1rbb/pppkp1pp/1n3p2/3p4/1P6/5P1P/P1PPPKP1/NNQR1RBB w - - 1 9
+epd 1nqr1rbb/pppkp1pp/1n3p2/3p4/1P6/5P1P/P1PPPKP1/NNQR1RBB w - -
 perft 1 24
 perft 2 623
 perft 3 15921
@@ -425,7 +425,7 @@ perft 5 11594634
 perft 6 322745925
 
 id 47
-epd bbn1rqkr/pp1pp2p/4npp1/2p5/1P6/2BPP3/P1P2PPP/1BNNRQKR w HEhe - 0 9
+epd bbn1rqkr/pp1pp2p/4npp1/2p5/1P6/2BPP3/P1P2PPP/1BNNRQKR w HEhe -
 perft 1 23
 perft 2 730
 perft 3 17743
@@ -434,7 +434,7 @@ perft 5 14496370
 perft 6 468608864
 
 id 48
-epd bn1brqkr/pppp2p1/3npp2/7p/PPP5/8/3PPPPP/BNNBRQKR w HEhe - 0 9
+epd bn1brqkr/pppp2p1/3npp2/7p/PPP5/8/3PPPPP/BNNBRQKR w HEhe -
 perft 1 25
 perft 2 673
 perft 3 17835
@@ -443,7 +443,7 @@ perft 5 14284338
 perft 6 434008567
 
 id 49
-epd bn1rqbkr/ppp1ppp1/1n6/2p4p/7P/3P4/PPP1PPP1/BN1RQBKR w HDhd - 0 9
+epd bn1rqbkr/ppp1ppp1/1n6/2p4p/7P/3P4/PPP1PPP1/BN1RQBKR w HDhd -
 perft 1 25
 perft 2 776
 perft 3 20562
@@ -452,7 +452,7 @@ perft 5 18486027
 perft 6 616653869
 
 id 50
-epd bnnr1krb/ppp2ppp/3p4/3Bp3/q1P3PP/8/PP1PPP2/BNNRQKR1 w GDgd - 0 9
+epd bnnr1krb/ppp2ppp/3p4/3Bp3/q1P3PP/8/PP1PPP2/BNNRQKR1 w GDgd -
 perft 1 29
 perft 2 1040
 perft 3 30772
@@ -461,7 +461,7 @@ perft 5 31801525
 perft 6 1075147725
 
 id 51
-epd 1bbnrqkr/pp1ppppp/8/2p5/n7/3PNPP1/PPP1P2P/NBB1RQKR w HEhe - 1 9
+epd 1bbnrqkr/pp1ppppp/8/2p5/n7/3PNPP1/PPP1P2P/NBB1RQKR w HEhe -
 perft 1 24
 perft 2 598
 perft 3 15673
@@ -470,7 +470,7 @@ perft 5 11394778
 perft 6 310589129
 
 id 52
-epd nnbbrqkr/p2ppp1p/1pp5/8/6p1/N1P5/PPBPPPPP/N1B1RQKR w HEhe - 0 9
+epd nnbbrqkr/p2ppp1p/1pp5/8/6p1/N1P5/PPBPPPPP/N1B1RQKR w HEhe -
 perft 1 26
 perft 2 530
 perft 3 14031
@@ -479,7 +479,7 @@ perft 5 8846766
 perft 6 229270702
 
 id 53
-epd nnbrqbkr/2p1p1pp/p4p2/1p1p4/8/NP6/P1PPPPPP/N1BRQBKR w HDhd - 0 9
+epd nnbrqbkr/2p1p1pp/p4p2/1p1p4/8/NP6/P1PPPPPP/N1BRQBKR w HDhd -
 perft 1 17
 perft 2 496
 perft 3 10220
@@ -488,7 +488,7 @@ perft 5 7103549
 perft 6 217108001
 
 id 54
-epd nnbrqk1b/pp2pprp/2pp2p1/8/3PP1P1/8/PPP2P1P/NNBRQRKB w d - 1 9
+epd nnbrqk1b/pp2pprp/2pp2p1/8/3PP1P1/8/PPP2P1P/NNBRQRKB w d -
 perft 1 33
 perft 2 820
 perft 3 27856
@@ -497,7 +497,7 @@ perft 5 24714401
 perft 6 645835197
 
 id 55
-epd 1bnrbqkr/ppnpp1p1/2p2p1p/8/1P6/4PPP1/P1PP3P/NBNRBQKR w HDhd - 0 9
+epd 1bnrbqkr/ppnpp1p1/2p2p1p/8/1P6/4PPP1/P1PP3P/NBNRBQKR w HDhd -
 perft 1 27
 perft 2 705
 perft 3 19760
@@ -506,7 +506,7 @@ perft 5 15964771
 perft 6 464662032
 
 id 56
-epd n1rbbqkr/pp1pppp1/7p/P1p5/1n6/2PP4/1P2PPPP/NNRBBQKR w HChc - 0 9
+epd n1rbbqkr/pp1pppp1/7p/P1p5/1n6/2PP4/1P2PPPP/NNRBBQKR w HChc -
 perft 1 22
 perft 2 631
 perft 3 14978
@@ -515,7 +515,7 @@ perft 5 10911545
 perft 6 320838556
 
 id 57
-epd n1rqb1kr/p1pppp1p/1pn4b/3P2p1/P7/1P6/2P1PPPP/NNRQBBKR w HChc - 0 9
+epd n1rqb1kr/p1pppp1p/1pn4b/3P2p1/P7/1P6/2P1PPPP/NNRQBBKR w HChc -
 perft 1 24
 perft 2 477
 perft 3 12506
@@ -524,7 +524,7 @@ perft 5 7419372
 perft 6 165945904
 
 id 58
-epd nnrqbkrb/pppp1pp1/7p/4p3/6P1/2N2B2/PPPPPP1P/NR1QBKR1 w Ggc - 2 9
+epd nnrqbkrb/pppp1pp1/7p/4p3/6P1/2N2B2/PPPPPP1P/NR1QBKR1 w Ggc -
 perft 1 29
 perft 2 658
 perft 3 19364
@@ -533,7 +533,7 @@ perft 5 14233587
 perft 6 373744834
 
 id 59
-epd n1nrqkbr/ppb2ppp/3pp3/2p5/2P3P1/5P2/PP1PPB1P/NBNRQK1R w HDhd - 1 9
+epd n1nrqkbr/ppb2ppp/3pp3/2p5/2P3P1/5P2/PP1PPB1P/NBNRQK1R w HDhd -
 perft 1 32
 perft 2 801
 perft 3 25861
@@ -542,7 +542,7 @@ perft 5 22318948
 perft 6 619857455
 
 id 60
-epd 2rbqkbr/p1pppppp/1nn5/1p6/7P/P4P2/1PPPP1PB/NNRBQK1R w HChc - 2 9
+epd 2rbqkbr/p1pppppp/1nn5/1p6/7P/P4P2/1PPPP1PB/NNRBQK1R w HChc -
 perft 1 27
 perft 2 647
 perft 3 18030
@@ -551,7 +551,7 @@ perft 5 13189156
 perft 6 354689323
 
 id 61
-epd nn1qkbbr/pp2ppp1/2rp4/2p4p/P2P4/1N5P/1PP1PPP1/1NRQKBBR w HCh - 1 9
+epd nn1qkbbr/pp2ppp1/2rp4/2p4p/P2P4/1N5P/1PP1PPP1/1NRQKBBR w HCh -
 perft 1 24
 perft 2 738
 perft 3 18916
@@ -560,7 +560,7 @@ perft 5 16420659
 perft 6 519075930
 
 id 62
-epd nnrqk1bb/p1ppp2p/5rp1/1p3p2/1P4P1/5P1P/P1PPP3/NNRQKRBB w FCc - 1 9
+epd nnrqk1bb/p1ppp2p/5rp1/1p3p2/1P4P1/5P1P/P1PPP3/NNRQKRBB w FCc -
 perft 1 25
 perft 2 795
 perft 3 20510
@@ -569,7 +569,7 @@ perft 5 17342527
 perft 6 556144017
 
 id 63
-epd bb1nrkqr/ppppn2p/4ppp1/8/1P4P1/4P3/P1PPKP1P/BBNNR1QR w he - 0 9
+epd bb1nrkqr/ppppn2p/4ppp1/8/1P4P1/4P3/P1PPKP1P/BBNNR1QR w he -
 perft 1 29
 perft 2 664
 perft 3 20024
@@ -578,7 +578,7 @@ perft 5 15373803
 perft 6 406016364
 
 id 64
-epd bnnbrkqr/1p1ppp2/8/p1p3pp/1P6/N4P2/PBPPP1PP/2NBRKQR w HEhe - 0 9
+epd bnnbrkqr/1p1ppp2/8/p1p3pp/1P6/N4P2/PBPPP1PP/2NBRKQR w HEhe -
 perft 1 31
 perft 2 770
 perft 3 24850
@@ -587,7 +587,7 @@ perft 5 22562080
 perft 6 662029574
 
 id 65
-epd 1nnrkbqr/p1pp1ppp/4p3/1p6/1Pb1P3/6PB/P1PP1P1P/BNNRK1QR w HDhd - 0 9
+epd 1nnrkbqr/p1pp1ppp/4p3/1p6/1Pb1P3/6PB/P1PP1P1P/BNNRK1QR w HDhd -
 perft 1 27
 perft 2 776
 perft 3 22133
@@ -596,7 +596,7 @@ perft 5 19153245
 perft 6 562738257
 
 id 66
-epd bnr1kqrb/pppp1pp1/1n5p/4p3/P3P3/3P2P1/1PP2P1P/BNNRKQRB w GDg - 0 9
+epd bnr1kqrb/pppp1pp1/1n5p/4p3/P3P3/3P2P1/1PP2P1P/BNNRKQRB w GDg -
 perft 1 26
 perft 2 624
 perft 3 16411
@@ -605,7 +605,7 @@ perft 5 11906515
 perft 6 338092952
 
 id 67
-epd nbbnrkqr/p1ppp1pp/1p3p2/8/2P5/4P3/PP1P1PPP/NBBNRKQR w HEhe - 1 9
+epd nbbnrkqr/p1ppp1pp/1p3p2/8/2P5/4P3/PP1P1PPP/NBBNRKQR w HEhe -
 perft 1 25
 perft 2 624
 perft 3 15561
@@ -614,7 +614,7 @@ perft 5 10817378
 perft 6 311138112
 
 id 68
-epd nn1brkqr/pp1bpppp/8/2pp4/P4P2/1PN5/2PPP1PP/N1BBRKQR w HEhe - 1 9
+epd nn1brkqr/pp1bpppp/8/2pp4/P4P2/1PN5/2PPP1PP/N1BBRKQR w HEhe -
 perft 1 23
 perft 2 659
 perft 3 16958
@@ -623,7 +623,7 @@ perft 5 13242252
 perft 6 373557073
 
 id 69
-epd n1brkbqr/ppp1pp1p/6pB/3p4/2Pn4/8/PP2PPPP/NN1RKBQR w HDhd - 0 9
+epd n1brkbqr/ppp1pp1p/6pB/3p4/2Pn4/8/PP2PPPP/NN1RKBQR w HDhd -
 perft 1 32
 perft 2 1026
 perft 3 30360
@@ -632,7 +632,7 @@ perft 5 29436320
 perft 6 957904151
 
 id 70
-epd nnbrkqrb/p2ppp2/Q5pp/1pp5/4PP2/2N5/PPPP2PP/N1BRK1RB w GDgd - 0 9
+epd nnbrkqrb/p2ppp2/Q5pp/1pp5/4PP2/2N5/PPPP2PP/N1BRK1RB w GDgd -
 perft 1 36
 perft 2 843
 perft 3 29017
@@ -641,7 +641,7 @@ perft 5 24321197
 perft 6 630396940
 
 id 71
-epd nbnrbk1r/pppppppq/8/7p/8/1N2QPP1/PPPPP2P/NB1RBK1R w HDhd - 2 9
+epd nbnrbk1r/pppppppq/8/7p/8/1N2QPP1/PPPPP2P/NB1RBK1R w HDhd -
 perft 1 36
 perft 2 973
 perft 3 35403
@@ -650,7 +650,7 @@ perft 5 37143354
 perft 6 1124883780
 
 id 72
-epd nnrbbkqr/2pppp1p/p7/6p1/1p2P3/4QPP1/PPPP3P/NNRBBK1R w HChc - 0 9
+epd nnrbbkqr/2pppp1p/p7/6p1/1p2P3/4QPP1/PPPP3P/NNRBBK1R w HChc -
 perft 1 36
 perft 2 649
 perft 3 22524
@@ -659,7 +659,7 @@ perft 5 16836636
 perft 6 416139320
 
 id 73
-epd nnrkbbqr/1p2pppp/p2p4/2p5/8/1N2P1P1/PPPP1P1P/1NKRBBQR w hc - 0 9
+epd nnrkbbqr/1p2pppp/p2p4/2p5/8/1N2P1P1/PPPP1P1P/1NKRBBQR w hc -
 perft 1 26
 perft 2 672
 perft 3 18136
@@ -668,7 +668,7 @@ perft 5 13342771
 perft 6 363074681
 
 id 74
-epd n1rkbqrb/pp1ppp2/2n3p1/2p4p/P5PP/1P6/2PPPP2/NNRKBQRB w GCgc - 0 9
+epd n1rkbqrb/pp1ppp2/2n3p1/2p4p/P5PP/1P6/2PPPP2/NNRKBQRB w GCgc -
 perft 1 24
 perft 2 804
 perft 3 20712
@@ -677,7 +677,7 @@ perft 5 18761475
 perft 6 617932151
 
 id 75
-epd nbkr1qbr/1pp1pppp/pn1p4/8/3P2P1/5R2/PPP1PP1P/NBN1KQBR w H - 2 9
+epd nbkr1qbr/1pp1pppp/pn1p4/8/3P2P1/5R2/PPP1PP1P/NBN1KQBR w H -
 perft 1 30
 perft 2 627
 perft 3 18669
@@ -686,7 +686,7 @@ perft 5 12815016
 perft 6 312798696
 
 id 76
-epd nnr1kqbr/pp1pp1p1/2p5/b4p1p/P7/1PNP4/2P1PPPP/N1RBKQBR w HChc - 1 9
+epd nnr1kqbr/pp1pp1p1/2p5/b4p1p/P7/1PNP4/2P1PPPP/N1RBKQBR w HChc -
 perft 1 12
 perft 2 421
 perft 3 6530
@@ -695,7 +695,7 @@ perft 5 4266410
 perft 6 149176979
 
 id 77
-epd n1rkqbbr/p1pp1pp1/np2p2p/8/8/N4PP1/PPPPP1BP/N1RKQ1BR w HChc - 0 9
+epd n1rkqbbr/p1pp1pp1/np2p2p/8/8/N4PP1/PPPPP1BP/N1RKQ1BR w HChc -
 perft 1 27
 perft 2 670
 perft 3 19119
@@ -704,7 +704,7 @@ perft 5 14708490
 perft 6 397268628
 
 id 78
-epd nnr1qrbb/p2kpppp/1p1p4/2p5/6P1/PP1P4/2P1PP1P/NNRKQRBB w FC - 0 9
+epd nnr1qrbb/p2kpppp/1p1p4/2p5/6P1/PP1P4/2P1PP1P/NNRKQRBB w FC -
 perft 1 27
 perft 2 604
 perft 3 17043
@@ -713,7 +713,7 @@ perft 5 11993332
 perft 6 308518181
 
 id 79
-epd bbnnrkrq/ppp1pp2/6p1/3p4/7p/7P/PPPPPPP1/BBNNRRKQ w ge - 0 9
+epd bbnnrkrq/ppp1pp2/6p1/3p4/7p/7P/PPPPPPP1/BBNNRRKQ w ge -
 perft 1 20
 perft 2 559
 perft 3 12242
@@ -722,7 +722,7 @@ perft 5 8427161
 perft 6 252274233
 
 id 80
-epd bnnbrkr1/ppp2p1p/5q2/3pp1p1/4P3/1N4P1/PPPPRP1P/BN1B1KRQ w Gge - 0 9
+epd bnnbrkr1/ppp2p1p/5q2/3pp1p1/4P3/1N4P1/PPPPRP1P/BN1B1KRQ w Gge -
 perft 1 26
 perft 2 1036
 perft 3 27228
@@ -731,7 +731,7 @@ perft 5 28286576
 perft 6 1042120495
 
 id 81
-epd bn1rkbrq/1pppppp1/p6p/1n6/3P4/6PP/PPPRPP2/BNN1KBRQ w Ggd - 2 9
+epd bn1rkbrq/1pppppp1/p6p/1n6/3P4/6PP/PPPRPP2/BNN1KBRQ w Ggd -
 perft 1 29
 perft 2 633
 perft 3 19278
@@ -740,7 +740,7 @@ perft 5 14333034
 perft 6 361900466
 
 id 82
-epd b1nrkrqb/1p1npppp/p2p4/2p5/5P2/4P2P/PPPP1RP1/BNNRK1QB w Dfd - 1 9
+epd b1nrkrqb/1p1npppp/p2p4/2p5/5P2/4P2P/PPPP1RP1/BNNRK1QB w Dfd -
 perft 1 25
 perft 2 475
 perft 3 12603
@@ -749,7 +749,7 @@ perft 5 7545536
 perft 6 179579818
 
 id 83
-epd 1bbnrkrq/ppppppp1/8/7p/1n4P1/1PN5/P1PPPP1P/NBBR1KRQ w Gge - 0 9
+epd 1bbnrkrq/ppppppp1/8/7p/1n4P1/1PN5/P1PPPP1P/NBBR1KRQ w Gge -
 perft 1 30
 perft 2 803
 perft 3 25473
@@ -758,7 +758,7 @@ perft 5 23443854
 perft 6 686365049
 
 id 84
-epd nnbbrkrq/2pp1pp1/1p5p/pP2p3/7P/N7/P1PPPPP1/N1BBRKRQ w GEge - 0 9
+epd nnbbrkrq/2pp1pp1/1p5p/pP2p3/7P/N7/P1PPPPP1/N1BBRKRQ w GEge -
 perft 1 18
 perft 2 432
 perft 3 9638
@@ -767,7 +767,7 @@ perft 5 6131124
 perft 6 160393505
 
 id 85
-epd nnbrkbrq/1pppp1p1/p7/7p/1P2Pp2/BN6/P1PP1PPP/1N1RKBRQ w GDgd - 0 9
+epd nnbrkbrq/1pppp1p1/p7/7p/1P2Pp2/BN6/P1PP1PPP/1N1RKBRQ w GDgd -
 perft 1 27
 perft 2 482
 perft 3 13441
@@ -776,7 +776,7 @@ perft 5 8084701
 perft 6 193484216
 
 id 86
-epd n1brkrqb/pppp3p/n3pp2/6p1/3P1P2/N1P5/PP2P1PP/N1BRKRQB w FDfd - 0 9
+epd n1brkrqb/pppp3p/n3pp2/6p1/3P1P2/N1P5/PP2P1PP/N1BRKRQB w FDfd -
 perft 1 28
 perft 2 642
 perft 3 19005
@@ -785,7 +785,7 @@ perft 5 14529434
 perft 6 384837696
 
 id 87
-epd nbnrbk2/p1pppp1p/1p3qr1/6p1/1B1P4/1N6/PPP1PPPP/1BNR1RKQ w d - 2 9
+epd nbnrbk2/p1pppp1p/1p3qr1/6p1/1B1P4/1N6/PPP1PPPP/1BNR1RKQ w d -
 perft 1 30
 perft 2 796
 perft 3 22780
@@ -794,7 +794,7 @@ perft 5 20120565
 perft 6 641832725
 
 id 88
-epd nnrbbrkq/1pp2ppp/3p4/p3p3/3P1P2/1P2P3/P1P3PP/NNRBBKRQ w GC - 1 9
+epd nnrbbrkq/1pp2ppp/3p4/p3p3/3P1P2/1P2P3/P1P3PP/NNRBBKRQ w GC -
 perft 1 31
 perft 2 827
 perft 3 24538
@@ -803,7 +803,7 @@ perft 5 19979594
 perft 6 549437308
 
 id 89
-epd nnrkbbrq/1pp2p1p/p2pp1p1/2P5/8/8/PP1PPPPP/NNRKBBRQ w Ggc - 0 9
+epd nnrkbbrq/1pp2p1p/p2pp1p1/2P5/8/8/PP1PPPPP/NNRKBBRQ w Ggc -
 perft 1 24
 perft 2 762
 perft 3 19283
@@ -812,7 +812,7 @@ perft 5 16838099
 perft 6 555230555
 
 id 90
-epd nnr1brqb/1ppkp1pp/8/p2p1p2/1P1P4/N1P5/P3PPPP/N1RKBRQB w FC - 1 9
+epd nnr1brqb/1ppkp1pp/8/p2p1p2/1P1P4/N1P5/P3PPPP/N1RKBRQB w FC -
 perft 1 23
 perft 2 640
 perft 3 15471
@@ -821,7 +821,7 @@ perft 5 11343507
 perft 6 334123513
 
 id 91
-epd nbnrkrbq/2ppp2p/p4p2/1P4p1/4PP2/8/1PPP2PP/NBNRKRBQ w FDfd - 0 9
+epd nbnrkrbq/2ppp2p/p4p2/1P4p1/4PP2/8/1PPP2PP/NBNRKRBQ w FDfd -
 perft 1 31
 perft 2 826
 perft 3 26137
@@ -830,7 +830,7 @@ perft 5 23555139
 perft 6 686250413
 
 id 92
-epd 1nrbkr1q/1pppp1pp/1n6/p4p2/N1b4P/8/PPPPPPPB/N1RBKR1Q w FCfc - 2 9
+epd 1nrbkr1q/1pppp1pp/1n6/p4p2/N1b4P/8/PPPPPPPB/N1RBKR1Q w FCfc -
 perft 1 27
 perft 2 862
 perft 3 24141
@@ -839,7 +839,7 @@ perft 5 22027695
 perft 6 696353497
 
 id 93
-epd nnrkrbbq/pppp2pp/8/4pp2/4P3/P7/1PPPBPPP/NNKRR1BQ w c - 0 9
+epd nnrkrbbq/pppp2pp/8/4pp2/4P3/P7/1PPPBPPP/NNKRR1BQ w c -
 perft 1 25
 perft 2 792
 perft 3 19883
@@ -848,7 +848,7 @@ perft 5 16473376
 perft 6 532214177
 
 id 94
-epd n1rk1qbb/pppprpp1/2n4p/4p3/2PP3P/8/PP2PPP1/NNRKRQBB w ECc - 1 9
+epd n1rk1qbb/pppprpp1/2n4p/4p3/2PP3P/8/PP2PPP1/NNRKRQBB w ECc -
 perft 1 25
 perft 2 622
 perft 3 16031
@@ -857,7 +857,7 @@ perft 5 11420973
 perft 6 321855685
 
 id 95
-epd bbq1rnkr/pnp1pp1p/1p1p4/6p1/2P5/2Q1P2P/PP1P1PP1/BB1NRNKR w HEhe - 2 9
+epd bbq1rnkr/pnp1pp1p/1p1p4/6p1/2P5/2Q1P2P/PP1P1PP1/BB1NRNKR w HEhe -
 perft 1 36
 perft 2 870
 perft 3 30516
@@ -866,7 +866,7 @@ perft 5 28127620
 perft 6 799738334
 
 id 96
-epd bq1brnkr/1p1ppp1p/1np5/p5p1/8/1N5P/PPPPPPP1/BQ1BRNKR w HEhe - 0 9
+epd bq1brnkr/1p1ppp1p/1np5/p5p1/8/1N5P/PPPPPPP1/BQ1BRNKR w HEhe -
 perft 1 22
 perft 2 588
 perft 3 13524
@@ -875,7 +875,7 @@ perft 5 9359618
 perft 6 273795898
 
 id 97
-epd bq1rn1kr/1pppppbp/Nn4p1/8/8/P7/1PPPPPPP/BQ1RNBKR w HDhd - 1 9
+epd bq1rn1kr/1pppppbp/Nn4p1/8/8/P7/1PPPPPPP/BQ1RNBKR w HDhd -
 perft 1 24
 perft 2 711
 perft 3 18197
@@ -884,7 +884,7 @@ perft 5 14692779
 perft 6 445827351
 
 id 98
-epd bqnr1kr1/pppppp1p/6p1/5n2/4B3/3N2PP/PbPPPP2/BQNR1KR1 w GDgd - 2 9
+epd bqnr1kr1/pppppp1p/6p1/5n2/4B3/3N2PP/PbPPPP2/BQNR1KR1 w GDgd -
 perft 1 31
 perft 2 1132
 perft 3 36559
@@ -893,7 +893,7 @@ perft 5 43256823
 perft 6 1456721391
 
 id 99
-epd qbb1rnkr/ppp3pp/4n3/3ppp2/1P3PP1/8/P1PPPN1P/QBB1RNKR w HEhe - 0 9
+epd qbb1rnkr/ppp3pp/4n3/3ppp2/1P3PP1/8/P1PPPN1P/QBB1RNKR w HEhe -
 perft 1 28
 perft 2 696
 perft 3 20502
@@ -902,7 +902,7 @@ perft 5 16492398
 perft 6 456983120
 
 id 100
-epd qnbbr1kr/pp1ppp1p/4n3/6p1/2p3P1/2PP1P2/PP2P2P/QNBBRNKR w HEhe - 0 9
+epd qnbbr1kr/pp1ppp1p/4n3/6p1/2p3P1/2PP1P2/PP2P2P/QNBBRNKR w HEhe -
 perft 1 25
 perft 2 655
 perft 3 16520
@@ -911,7 +911,7 @@ perft 5 11767038
 perft 6 335414976
 
 id 101
-epd 1nbrnbkr/p1ppp1pp/1p6/5p2/4q1PP/3P4/PPP1PP2/QNBRNBKR w HDhd - 1 9
+epd 1nbrnbkr/p1ppp1pp/1p6/5p2/4q1PP/3P4/PPP1PP2/QNBRNBKR w HDhd -
 perft 1 30
 perft 2 1162
 perft 3 33199
@@ -920,7 +920,7 @@ perft 5 36048727
 perft 6 1290346802
 
 id 102
-epd q1brnkrb/p1pppppp/n7/1p6/P7/3P1P2/QPP1P1PP/1NBRNKRB w GDgd - 0 9
+epd q1brnkrb/p1pppppp/n7/1p6/P7/3P1P2/QPP1P1PP/1NBRNKRB w GDgd -
 perft 1 32
 perft 2 827
 perft 3 26106
@@ -929,7 +929,7 @@ perft 5 23143989
 perft 6 673147648
 
 id 103
-epd qbnrb1kr/ppp1pp1p/3p4/2n3p1/1P6/6N1/P1PPPPPP/QBNRB1KR w HDhd - 2 9
+epd qbnrb1kr/ppp1pp1p/3p4/2n3p1/1P6/6N1/P1PPPPPP/QBNRB1KR w HDhd -
 perft 1 29
 perft 2 751
 perft 3 23132
@@ -938,7 +938,7 @@ perft 5 19555214
 perft 6 530475036
 
 id 104
-epd q1rbbnkr/pppp1p2/2n3pp/2P1p3/3P4/8/PP1NPPPP/Q1RBBNKR w HChc - 2 9
+epd q1rbbnkr/pppp1p2/2n3pp/2P1p3/3P4/8/PP1NPPPP/Q1RBBNKR w HChc -
 perft 1 29
 perft 2 806
 perft 3 24540
@@ -947,7 +947,7 @@ perft 5 21694330
 perft 6 619907316
 
 id 105
-epd q1r1bbkr/pnpp1ppp/2n1p3/1p6/2P2P2/2N1N3/PP1PP1PP/Q1R1BBKR w HChc - 2 9
+epd q1r1bbkr/pnpp1ppp/2n1p3/1p6/2P2P2/2N1N3/PP1PP1PP/Q1R1BBKR w HChc -
 perft 1 32
 perft 2 1017
 perft 3 32098
@@ -956,7 +956,7 @@ perft 5 31204371
 perft 6 958455898
 
 id 106
-epd 2rnbkrb/pqppppp1/1pn5/7p/2P5/P1R5/QP1PPPPP/1N1NBKRB w Ggc - 4 9
+epd 2rnbkrb/pqppppp1/1pn5/7p/2P5/P1R5/QP1PPPPP/1N1NBKRB w Ggc -
 perft 1 26
 perft 2 625
 perft 3 16506
@@ -965,7 +965,7 @@ perft 5 11856964
 perft 6 336672890
 
 id 107
-epd qbnr1kbr/p2ppppp/2p5/1p6/4n2P/P4N2/1PPP1PP1/QBNR1KBR w HDhd - 0 9
+epd qbnr1kbr/p2ppppp/2p5/1p6/4n2P/P4N2/1PPP1PP1/QBNR1KBR w HDhd -
 perft 1 27
 perft 2 885
 perft 3 23828
@@ -974,7 +974,7 @@ perft 5 21855658
 perft 6 706272554
 
 id 108
-epd qnrbnk1r/pp1pp2p/5p2/2pbP1p1/3P4/1P6/P1P2PPP/QNRBNKBR w HChc - 0 9
+epd qnrbnk1r/pp1pp2p/5p2/2pbP1p1/3P4/1P6/P1P2PPP/QNRBNKBR w HChc -
 perft 1 26
 perft 2 954
 perft 3 24832
@@ -983,7 +983,7 @@ perft 5 24415089
 perft 6 866744329
 
 id 109
-epd qnrnk1br/p1p2ppp/8/1pbpp3/8/PP2N3/1QPPPPPP/1NR1KBBR w HChc - 0 9
+epd qnrnk1br/p1p2ppp/8/1pbpp3/8/PP2N3/1QPPPPPP/1NR1KBBR w HChc -
 perft 1 26
 perft 2 783
 perft 3 20828
@@ -992,7 +992,7 @@ perft 5 17477825
 perft 6 539674275
 
 id 110
-epd qnrnkrbb/Bpppp2p/6p1/5p2/5P2/3PP3/PPP3PP/QNRNKR1B w FCfc - 1 9
+epd qnrnkrbb/Bpppp2p/6p1/5p2/5P2/3PP3/PPP3PP/QNRNKR1B w FCfc -
 perft 1 28
 perft 2 908
 perft 3 25730
@@ -1001,7 +1001,7 @@ perft 5 25251641
 perft 6 869525254
 
 id 111
-epd bbnqrn1r/ppppp2k/5p2/6pp/7P/1QP5/PP1PPPP1/B1N1RNKR w HE - 0 9
+epd bbnqrn1r/ppppp2k/5p2/6pp/7P/1QP5/PP1PPPP1/B1N1RNKR w HE -
 perft 1 33
 perft 2 643
 perft 3 21790
@@ -1010,7 +1010,7 @@ perft 5 16693640
 perft 6 410115900
 
 id 112
-epd b1qbrnkr/ppp1pp2/2np4/6pp/4P3/2N4P/PPPP1PP1/BQ1BRNKR w HEhe - 0 9
+epd b1qbrnkr/ppp1pp2/2np4/6pp/4P3/2N4P/PPPP1PP1/BQ1BRNKR w HEhe -
 perft 1 28
 perft 2 837
 perft 3 24253
@@ -1019,7 +1019,7 @@ perft 5 22197063
 perft 6 696399065
 
 id 113
-epd bnqr1bkr/pp1ppppp/2p5/4N3/5P2/P7/1PPPPnPP/BNQR1BKR w HDhd - 3 9
+epd bnqr1bkr/pp1ppppp/2p5/4N3/5P2/P7/1PPPPnPP/BNQR1BKR w HDhd -
 perft 1 25
 perft 2 579
 perft 3 13909
@@ -1028,7 +1028,7 @@ perft 5 8601011
 perft 6 225530258
 
 id 114
-epd b1qr1krb/pp1ppppp/n2n4/8/2p5/2P3P1/PP1PPP1P/BNQRNKRB w GDgd - 0 9
+epd b1qr1krb/pp1ppppp/n2n4/8/2p5/2P3P1/PP1PPP1P/BNQRNKRB w GDgd -
 perft 1 28
 perft 2 707
 perft 3 19721
@@ -1037,7 +1037,7 @@ perft 5 15583376
 perft 6 468399900
 
 id 115
-epd nbbqr1kr/1pppp1pp/8/p1n2p2/4P3/PN6/1PPPQPPP/1BB1RNKR w HEhe - 0 9
+epd nbbqr1kr/1pppp1pp/8/p1n2p2/4P3/PN6/1PPPQPPP/1BB1RNKR w HEhe -
 perft 1 30
 perft 2 745
 perft 3 23416
@@ -1046,7 +1046,7 @@ perft 5 19478789
 perft 6 515473678
 
 id 116
-epd nqbbrn1r/p1pppp1k/1p4p1/7p/4P3/1R3B2/PPPP1PPP/NQB2NKR w H - 0 9
+epd nqbbrn1r/p1pppp1k/1p4p1/7p/4P3/1R3B2/PPPP1PPP/NQB2NKR w H -
 perft 1 24
 perft 2 504
 perft 3 13512
@@ -1055,7 +1055,7 @@ perft 5 9002073
 perft 6 228726497
 
 id 117
-epd nqbr1bkr/p1p1ppp1/1p1n4/3pN2p/1P6/8/P1PPPPPP/NQBR1BKR w HDhd - 0 9
+epd nqbr1bkr/p1p1ppp1/1p1n4/3pN2p/1P6/8/P1PPPPPP/NQBR1BKR w HDhd -
 perft 1 29
 perft 2 898
 perft 3 26532
@@ -1064,7 +1064,7 @@ perft 5 24703467
 perft 6 757166494
 
 id 118
-epd nqbrn1rb/pppp1kp1/5p1p/4p3/P4B2/3P2P1/1PP1PP1P/NQ1RNKRB w GD - 0 9
+epd nqbrn1rb/pppp1kp1/5p1p/4p3/P4B2/3P2P1/1PP1PP1P/NQ1RNKRB w GD -
 perft 1 34
 perft 2 671
 perft 3 22332
@@ -1073,7 +1073,7 @@ perft 5 15556806
 perft 6 353235120
 
 id 119
-epd nb1r1nkr/ppp1ppp1/2bp4/7p/3P2qP/P6R/1PP1PPP1/NBQRBNK1 w Dhd - 1 9
+epd nb1r1nkr/ppp1ppp1/2bp4/7p/3P2qP/P6R/1PP1PPP1/NBQRBNK1 w Dhd -
 perft 1 38
 perft 2 1691
 perft 3 60060
@@ -1082,7 +1082,7 @@ perft 5 88557078
 perft 6 3589649998
 
 id 120
-epd n1rbbnkr/1p1pp1pp/p7/2p1qp2/1B3P2/3P4/PPP1P1PP/NQRB1NKR w HChc - 0 9
+epd n1rbbnkr/1p1pp1pp/p7/2p1qp2/1B3P2/3P4/PPP1P1PP/NQRB1NKR w HChc -
 perft 1 24
 perft 2 913
 perft 3 21595
@@ -1091,7 +1091,7 @@ perft 5 19866918
 perft 6 737239330
 
 id 121
-epd nqrnbbkr/p2p1p1p/1pp5/1B2p1p1/1P3P2/4P3/P1PP2PP/NQRNB1KR w HChc - 0 9
+epd nqrnbbkr/p2p1p1p/1pp5/1B2p1p1/1P3P2/4P3/P1PP2PP/NQRNB1KR w HChc -
 perft 1 33
 perft 2 913
 perft 3 30159
@@ -1100,7 +1100,7 @@ perft 5 28053260
 perft 6 804687975
 
 id 122
-epd nqr1bkrb/ppp1pp2/2np2p1/P6p/8/2P4P/1P1PPPP1/NQRNBKRB w GCgc - 0 9
+epd nqr1bkrb/ppp1pp2/2np2p1/P6p/8/2P4P/1P1PPPP1/NQRNBKRB w GCgc -
 perft 1 24
 perft 2 623
 perft 3 16569
@@ -1109,7 +1109,7 @@ perft 5 12681936
 perft 6 351623879
 
 id 123
-epd nb1rnkbr/pqppppp1/1p5p/8/1PP4P/8/P2PPPP1/NBQRNKBR w HDhd - 1 9
+epd nb1rnkbr/pqppppp1/1p5p/8/1PP4P/8/P2PPPP1/NBQRNKBR w HDhd -
 perft 1 31
 perft 2 798
 perft 3 24862
@@ -1118,7 +1118,7 @@ perft 5 22616076
 perft 6 666227466
 
 id 124
-epd nqrbnkbr/2p1p1pp/3p4/pp3p2/6PP/3P1N2/PPP1PP2/NQRB1KBR w HChc - 0 9
+epd nqrbnkbr/2p1p1pp/3p4/pp3p2/6PP/3P1N2/PPP1PP2/NQRB1KBR w HChc -
 perft 1 24
 perft 2 590
 perft 3 14409
@@ -1127,7 +1127,7 @@ perft 5 9698432
 perft 6 274064911
 
 id 125
-epd nqrnkbbr/pp1p1p1p/4p1p1/1p6/8/5P1P/P1PPP1P1/NQRNKBBR w HChc - 0 9
+epd nqrnkbbr/pp1p1p1p/4p1p1/1p6/8/5P1P/P1PPP1P1/NQRNKBBR w HChc -
 perft 1 30
 perft 2 1032
 perft 3 31481
@@ -1136,7 +1136,7 @@ perft 5 34914919
 perft 6 1233362066
 
 id 126
-epd nqrnkrbb/p2ppppp/1p6/2p5/2P3P1/5P2/PP1PPN1P/NQR1KRBB w FCfc - 1 9
+epd nqrnkrbb/p2ppppp/1p6/2p5/2P3P1/5P2/PP1PPN1P/NQR1KRBB w FCfc -
 perft 1 30
 perft 2 775
 perft 3 23958
@@ -1145,7 +1145,7 @@ perft 5 21141738
 perft 6 621142773
 
 id 127
-epd bbnrqrk1/pp2pppp/4n3/2pp4/P7/1N5P/BPPPPPP1/B2RQNKR w HD - 2 9
+epd bbnrqrk1/pp2pppp/4n3/2pp4/P7/1N5P/BPPPPPP1/B2RQNKR w HD -
 perft 1 23
 perft 2 708
 perft 3 17164
@@ -1154,7 +1154,7 @@ perft 5 14343443
 perft 6 481405144
 
 id 128
-epd bnr1qnkr/p1pp1p1p/1p4p1/4p1b1/2P1P3/1P6/PB1P1PPP/1NRBQNKR w HChc - 1 9
+epd bnr1qnkr/p1pp1p1p/1p4p1/4p1b1/2P1P3/1P6/PB1P1PPP/1NRBQNKR w HChc -
 perft 1 30
 perft 2 931
 perft 3 29249
@@ -1163,7 +1163,7 @@ perft 5 30026687
 perft 6 968109774
 
 id 129
-epd b1rqnbkr/ppp1ppp1/3p3p/2n5/P3P3/2NP4/1PP2PPP/B1RQNBKR w HChc - 0 9
+epd b1rqnbkr/ppp1ppp1/3p3p/2n5/P3P3/2NP4/1PP2PPP/B1RQNBKR w HChc -
 perft 1 24
 perft 2 596
 perft 3 15533
@@ -1172,7 +1172,7 @@ perft 5 11099382
 perft 6 294180723
 
 id 130
-epd bnrqnr1b/pp1pkppp/2p1p3/P7/2P5/7P/1P1PPPP1/BNRQNKRB w GC - 0 9
+epd bnrqnr1b/pp1pkppp/2p1p3/P7/2P5/7P/1P1PPPP1/BNRQNKRB w GC -
 perft 1 24
 perft 2 572
 perft 3 15293
@@ -1181,7 +1181,7 @@ perft 5 11208688
 perft 6 302955778
 
 id 131
-epd n1brq1kr/bppppppp/p7/8/4P1Pn/8/PPPP1P2/NBBRQNKR w HDhd - 0 9
+epd n1brq1kr/bppppppp/p7/8/4P1Pn/8/PPPP1P2/NBBRQNKR w HDhd -
 perft 1 20
 perft 2 570
 perft 3 13139
@@ -1190,7 +1190,7 @@ perft 5 9919113
 perft 6 284592289
 
 id 132
-epd 1rbbqnkr/ppn1ppp1/3p3p/2p5/3P4/1N4P1/PPPBPP1P/1R1BQNKR w HBhb - 0 9
+epd 1rbbqnkr/ppn1ppp1/3p3p/2p5/3P4/1N4P1/PPPBPP1P/1R1BQNKR w HBhb -
 perft 1 29
 perft 2 1009
 perft 3 29547
@@ -1199,7 +1199,7 @@ perft 5 31059587
 perft 6 1111986835
 
 id 133
-epd nrbq2kr/ppppppb1/5n1p/5Pp1/8/P5P1/1PPPP2P/NRBQNBKR w HBhb - 1 9
+epd nrbq2kr/ppppppb1/5n1p/5Pp1/8/P5P1/1PPPP2P/NRBQNBKR w HBhb -
 perft 1 20
 perft 2 520
 perft 3 11745
@@ -1208,7 +1208,7 @@ perft 5 7809837
 perft 6 216997152
 
 id 134
-epd nrb1nkrb/pp3ppp/1qBpp3/2p5/8/P5P1/1PPPPP1P/NRBQNKR1 w GBgb - 2 9
+epd nrb1nkrb/pp3ppp/1qBpp3/2p5/8/P5P1/1PPPPP1P/NRBQNKR1 w GBgb -
 perft 1 32
 perft 2 850
 perft 3 25642
@@ -1217,7 +1217,7 @@ perft 5 21981567
 perft 6 664886187
 
 id 135
-epd 1br1bnkr/ppqppp1p/1np3p1/8/1PP4P/4N3/P2PPPP1/NBRQB1KR w HChc - 1 9
+epd 1br1bnkr/ppqppp1p/1np3p1/8/1PP4P/4N3/P2PPPP1/NBRQB1KR w HChc -
 perft 1 32
 perft 2 798
 perft 3 24765
@@ -1226,7 +1226,7 @@ perft 5 22076141
 perft 6 670296871
 
 id 136
-epd nrqbb1kr/1p1pp1pp/2p3n1/p4p2/3PP3/P5N1/1PP2PPP/NRQBB1KR w HBhb - 0 9
+epd nrqbb1kr/1p1pp1pp/2p3n1/p4p2/3PP3/P5N1/1PP2PPP/NRQBB1KR w HBhb -
 perft 1 32
 perft 2 791
 perft 3 26213
@@ -1235,7 +1235,7 @@ perft 5 23239122
 perft 6 634260266
 
 id 137
-epd nrqn1bkr/ppppp1pp/4b3/8/4P1p1/5P2/PPPP3P/NRQNBBKR w HBhb - 0 9
+epd nrqn1bkr/ppppp1pp/4b3/8/4P1p1/5P2/PPPP3P/NRQNBBKR w HBhb -
 perft 1 29
 perft 2 687
 perft 3 20223
@@ -1244,7 +1244,7 @@ perft 5 15236287
 perft 6 398759980
 
 id 138
-epd nrqnbrkb/pppp1p2/4p2p/3B2p1/8/1P4P1/PQPPPP1P/NR1NBKR1 w GB - 0 9
+epd nrqnbrkb/pppp1p2/4p2p/3B2p1/8/1P4P1/PQPPPP1P/NR1NBKR1 w GB -
 perft 1 37
 perft 2 764
 perft 3 27073
@@ -1253,7 +1253,7 @@ perft 5 21284835
 perft 6 514864869
 
 id 139
-epd nbrq1kbr/Bp3ppp/2pnp3/3p4/5P2/2P4P/PP1PP1P1/NBRQNK1R w HChc - 0 9
+epd nbrq1kbr/Bp3ppp/2pnp3/3p4/5P2/2P4P/PP1PP1P1/NBRQNK1R w HChc -
 perft 1 40
 perft 2 1271
 perft 3 48022
@@ -1262,7 +1262,7 @@ perft 5 56588117
 perft 6 1850696281
 
 id 140
-epd nrqbnkbr/1p2ppp1/p1p4p/3p4/1P6/8/PQPPPPPP/1RNBNKBR w HBhb - 0 9
+epd nrqbnkbr/1p2ppp1/p1p4p/3p4/1P6/8/PQPPPPPP/1RNBNKBR w HBhb -
 perft 1 28
 perft 2 757
 perft 3 23135
@@ -1271,7 +1271,7 @@ perft 5 21427496
 perft 6 650939962
 
 id 141
-epd nrqn1bbr/2ppkppp/4p3/pB6/8/2P1P3/PP1P1PPP/NRQNK1BR w HB - 1 9
+epd nrqn1bbr/2ppkppp/4p3/pB6/8/2P1P3/PP1P1PPP/NRQNK1BR w HB -
 perft 1 27
 perft 2 642
 perft 3 17096
@@ -1280,7 +1280,7 @@ perft 5 11872805
 perft 6 327545120
 
 id 142
-epd nrqnkrb1/p1ppp2p/1p4p1/4bp2/4PP1P/4N3/PPPP2P1/NRQ1KRBB w FBfb - 1 9
+epd nrqnkrb1/p1ppp2p/1p4p1/4bp2/4PP1P/4N3/PPPP2P1/NRQ1KRBB w FBfb -
 perft 1 27
 perft 2 958
 perft 3 27397
@@ -1289,7 +1289,7 @@ perft 5 28520172
 perft 6 995356563
 
 id 143
-epd 1bnrnqkr/pbpp2pp/8/1p2pp2/P6P/3P1N2/1PP1PPP1/BBNR1QKR w HDhd - 0 9
+epd 1bnrnqkr/pbpp2pp/8/1p2pp2/P6P/3P1N2/1PP1PPP1/BBNR1QKR w HDhd -
 perft 1 27
 perft 2 859
 perft 3 23475
@@ -1298,7 +1298,7 @@ perft 5 21581178
 perft 6 732696327
 
 id 144
-epd b1rbnqkr/1pp1ppp1/2n4p/p2p4/5P2/1PBP4/P1P1P1PP/1NRBNQKR w HChc - 0 9
+epd b1rbnqkr/1pp1ppp1/2n4p/p2p4/5P2/1PBP4/P1P1P1PP/1NRBNQKR w HChc -
 perft 1 26
 perft 2 545
 perft 3 14817
@@ -1307,7 +1307,7 @@ perft 5 9537260
 perft 6 233549184
 
 id 145
-epd 1nrnqbkr/p1pppppp/1p6/8/2b2P2/P1N5/1PP1P1PP/BNR1QBKR w HChc - 2 9
+epd 1nrnqbkr/p1pppppp/1p6/8/2b2P2/P1N5/1PP1P1PP/BNR1QBKR w HChc -
 perft 1 24
 perft 2 668
 perft 3 17716
@@ -1316,7 +1316,7 @@ perft 5 14216070
 perft 6 406225409
 
 id 146
-epd 1nrnqkrb/2ppp1pp/p7/1p3p2/5P2/N5K1/PPPPP2P/B1RNQ1RB w gc - 0 9
+epd 1nrnqkrb/2ppp1pp/p7/1p3p2/5P2/N5K1/PPPPP2P/B1RNQ1RB w gc -
 perft 1 33
 perft 2 725
 perft 3 23572
@@ -1325,7 +1325,7 @@ perft 5 18547476
 perft 6 471443091
 
 id 147
-epd nbbr1qkr/p1pppppp/8/1p1n4/3P4/1N3PP1/PPP1P2P/1BBRNQKR w HDhd - 1 9
+epd nbbr1qkr/p1pppppp/8/1p1n4/3P4/1N3PP1/PPP1P2P/1BBRNQKR w HDhd -
 perft 1 28
 perft 2 698
 perft 3 20527
@@ -1334,7 +1334,7 @@ perft 5 16555068
 perft 6 458045505
 
 id 148
-epd 1rbbnqkr/1pnppp1p/p5p1/2p5/2P4P/5P2/PP1PP1PR/NRBBNQK1 w Bhb - 1 9
+epd 1rbbnqkr/1pnppp1p/p5p1/2p5/2P4P/5P2/PP1PP1PR/NRBBNQK1 w Bhb -
 perft 1 24
 perft 2 554
 perft 3 14221
@@ -1343,7 +1343,7 @@ perft 5 9863080
 perft 6 269284081
 
 id 149
-epd nrb1qbkr/2pppppp/2n5/p7/2p5/4P3/PPNP1PPP/1RBNQBKR w HBhb - 0 9
+epd nrb1qbkr/2pppppp/2n5/p7/2p5/4P3/PPNP1PPP/1RBNQBKR w HBhb -
 perft 1 23
 perft 2 618
 perft 3 15572
@@ -1352,7 +1352,7 @@ perft 5 12044358
 perft 6 360311412
 
 id 150
-epd nrb1qkrb/2ppppp1/p3n3/1p1B3p/2P5/6P1/PP1PPPRP/NRBNQK2 w Bgb - 2 9
+epd nrb1qkrb/2ppppp1/p3n3/1p1B3p/2P5/6P1/PP1PPPRP/NRBNQK2 w Bgb -
 perft 1 27
 perft 2 593
 perft 3 16770
@@ -1361,7 +1361,7 @@ perft 5 11806808
 perft 6 303338935
 
 id 151
-epd nbrn1qkr/ppp1pp2/3p2p1/3Q3P/b7/8/PPPPPP1P/NBRNB1KR w HChc - 2 9
+epd nbrn1qkr/ppp1pp2/3p2p1/3Q3P/b7/8/PPPPPP1P/NBRNB1KR w HChc -
 perft 1 39
 perft 2 1056
 perft 3 40157
@@ -1370,7 +1370,7 @@ perft 5 42201531
 perft 6 1239888683
 
 id 152
-epd nr1bbqkr/pp1pp2p/1n3pp1/2p5/8/1P4P1/P1PPPPQP/NRNBBK1R w hb - 0 9
+epd nr1bbqkr/pp1pp2p/1n3pp1/2p5/8/1P4P1/P1PPPPQP/NRNBBK1R w hb -
 perft 1 25
 perft 2 585
 perft 3 15719
@@ -1379,7 +1379,7 @@ perft 5 11582539
 perft 6 320997679
 
 id 153
-epd nr2bbkr/ppp1pppp/1n1p4/8/6PP/1NP4q/PP1PPP2/1RNQBBKR w HBhb - 1 9
+epd nr2bbkr/ppp1pppp/1n1p4/8/6PP/1NP4q/PP1PPP2/1RNQBBKR w HBhb -
 perft 1 22
 perft 2 742
 perft 3 15984
@@ -1388,7 +1388,7 @@ perft 5 13287051
 perft 6 457010195
 
 id 154
-epd 1rnqbkrb/ppp1p1p1/1n3p2/3p3p/P6P/4P3/1PPP1PP1/NRNQBRKB w gb - 0 9
+epd 1rnqbkrb/ppp1p1p1/1n3p2/3p3p/P6P/4P3/1PPP1PP1/NRNQBRKB w gb -
 perft 1 22
 perft 2 574
 perft 3 14044
@@ -1397,7 +1397,7 @@ perft 5 9968830
 perft 6 281344367
 
 id 155
-epd nb1rqkbr/1pppp1pp/4n3/p4p2/6PP/5P2/PPPPPN2/NBR1QKBR w HCh - 0 9
+epd nb1rqkbr/1pppp1pp/4n3/p4p2/6PP/5P2/PPPPPN2/NBR1QKBR w HCh -
 perft 1 25
 perft 2 621
 perft 3 16789
@@ -1406,7 +1406,7 @@ perft 5 13378840
 perft 6 396575613
 
 id 156
-epd nrnbqkbr/2pp2pp/4pp2/pp6/8/1P3P2/P1PPPBPP/NRNBQ1KR w hb - 0 9
+epd nrnbqkbr/2pp2pp/4pp2/pp6/8/1P3P2/P1PPPBPP/NRNBQ1KR w hb -
 perft 1 25
 perft 2 656
 perft 3 16951
@@ -1415,7 +1415,7 @@ perft 5 12525939
 perft 6 358763789
 
 id 157
-epd nrnqkbbr/ppppp1p1/7p/5p2/8/P4PP1/NPPPP2P/NR1QKBBR w HBhb - 0 9
+epd nrnqkbbr/ppppp1p1/7p/5p2/8/P4PP1/NPPPP2P/NR1QKBBR w HBhb -
 perft 1 28
 perft 2 723
 perft 3 20621
@@ -1424,7 +1424,7 @@ perft 5 15952533
 perft 6 439046803
 
 id 158
-epd 1rnqkr1b/ppppp2p/1n3pp1/8/2P3P1/Pb1N4/1P1PPP1P/NR1QKRBB w FBfb - 0 9
+epd 1rnqkr1b/ppppp2p/1n3pp1/8/2P3P1/Pb1N4/1P1PPP1P/NR1QKRBB w FBfb -
 perft 1 26
 perft 2 713
 perft 3 19671
@@ -1433,7 +1433,7 @@ perft 5 15865528
 perft 6 454532806
 
 id 159
-epd bbnrnkqr/1pppp1pp/5p2/p7/7P/1P6/PBPPPPPR/1BNRNKQ1 w D - 2 9
+epd bbnrnkqr/1pppp1pp/5p2/p7/7P/1P6/PBPPPPPR/1BNRNKQ1 w D -
 perft 1 26
 perft 2 649
 perft 3 17834
@@ -1442,7 +1442,7 @@ perft 5 14375839
 perft 6 435585252
 
 id 160
-epd bnrbk1qr/1ppp1ppp/p2np3/8/P7/2N2P2/1PPPP1PP/B1RBNKQR w HC - 0 9
+epd bnrbk1qr/1ppp1ppp/p2np3/8/P7/2N2P2/1PPPP1PP/B1RBNKQR w HC -
 perft 1 26
 perft 2 621
 perft 3 17569
@@ -1451,7 +1451,7 @@ perft 5 13514201
 perft 6 364421088
 
 id 161
-epd br1nkbqr/ppppppp1/8/n6p/8/N1P2PP1/PP1PP2P/B1RNKBQR w HCh - 1 9
+epd br1nkbqr/ppppppp1/8/n6p/8/N1P2PP1/PP1PP2P/B1RNKBQR w HCh -
 perft 1 29
 perft 2 664
 perft 3 20182
@@ -1460,7 +1460,7 @@ perft 5 16125924
 perft 6 442508159
 
 id 162
-epd bnr1kqrb/pp1pppp1/2n5/2p5/1P4Pp/4N3/P1PPPP1P/BNKR1QRB w gc - 0 9
+epd bnr1kqrb/pp1pppp1/2n5/2p5/1P4Pp/4N3/P1PPPP1P/BNKR1QRB w gc -
 perft 1 36
 perft 2 888
 perft 3 31630
@@ -1469,7 +1469,7 @@ perft 5 27792175
 perft 6 719015345
 
 id 163
-epd 1bbrnkqr/pp1p1ppp/2p1p3/1n6/5P2/3Q4/PPPPP1PP/NBBRNK1R w HDhd - 2 9
+epd 1bbrnkqr/pp1p1ppp/2p1p3/1n6/5P2/3Q4/PPPPP1PP/NBBRNK1R w HDhd -
 perft 1 36
 perft 2 891
 perft 3 31075
@@ -1478,7 +1478,7 @@ perft 5 26998966
 perft 6 702903862
 
 id 164
-epd nrbbnk1r/pp2pppq/8/2pp3p/3P2P1/1N6/PPP1PP1P/1RBBNKQR w HBhb - 0 9
+epd nrbbnk1r/pp2pppq/8/2pp3p/3P2P1/1N6/PPP1PP1P/1RBBNKQR w HBhb -
 perft 1 29
 perft 2 1036
 perft 3 31344
@@ -1487,7 +1487,7 @@ perft 5 35627310
 perft 6 1310683359
 
 id 165
-epd nr1nkbqr/ppp3pp/5p2/3pp3/6b1/3PP3/PPP2PPP/NRBNKBQR w hb - 0 9
+epd nr1nkbqr/ppp3pp/5p2/3pp3/6b1/3PP3/PPP2PPP/NRBNKBQR w hb -
 perft 1 18
 perft 2 664
 perft 3 13306
@@ -1496,7 +1496,7 @@ perft 5 10658989
 perft 6 386307449
 
 id 166
-epd nrbnk1rb/ppp1pq1p/3p4/5pp1/2P1P3/1N6/PP1PKPPP/1RBN1QRB w gb - 2 9
+epd nrbnk1rb/ppp1pq1p/3p4/5pp1/2P1P3/1N6/PP1PKPPP/1RBN1QRB w gb -
 perft 1 25
 perft 2 966
 perft 3 24026
@@ -1505,7 +1505,7 @@ perft 5 23957242
 perft 6 913710194
 
 id 167
-epd 1brnbkqr/pppppp2/6p1/7p/1Pn5/P1NP4/2P1PPPP/NBR1BKQR w HChc - 0 9
+epd 1brnbkqr/pppppp2/6p1/7p/1Pn5/P1NP4/2P1PPPP/NBR1BKQR w HChc -
 perft 1 22
 perft 2 627
 perft 3 13760
@@ -1514,7 +1514,7 @@ perft 5 9627826
 perft 6 285900573
 
 id 168
-epd nrnbbk1r/p1pppppq/8/7p/1p6/P5PP/1PPPPPQ1/NRNBBK1R w HBhb - 2 9
+epd nrnbbk1r/p1pppppq/8/7p/1p6/P5PP/1PPPPPQ1/NRNBBK1R w HBhb -
 perft 1 29
 perft 2 888
 perft 3 26742
@@ -1523,7 +1523,7 @@ perft 5 27229468
 perft 6 930799376
 
 id 169
-epd n1nkb1qr/prppppbp/6p1/1p6/2P2P2/P7/1P1PP1PP/NRNKBBQR w HBh - 1 9
+epd n1nkb1qr/prppppbp/6p1/1p6/2P2P2/P7/1P1PP1PP/NRNKBBQR w HBh -
 perft 1 29
 perft 2 804
 perft 3 24701
@@ -1532,7 +1532,7 @@ perft 5 21952444
 perft 6 623156747
 
 id 170
-epd nr2bqrb/ppkpp1pp/1np5/5p1P/5P2/2P5/PP1PP1P1/NRNKBQRB w GB - 0 9
+epd nr2bqrb/ppkpp1pp/1np5/5p1P/5P2/2P5/PP1PP1P1/NRNKBQRB w GB -
 perft 1 22
 perft 2 530
 perft 3 13055
@@ -1541,7 +1541,7 @@ perft 5 9244693
 perft 6 264088392
 
 id 171
-epd nbr1kqbr/p3pppp/2ppn3/1p4P1/4P3/1P6/P1PP1P1P/NBRNKQBR w HChc - 1 9
+epd nbr1kqbr/p3pppp/2ppn3/1p4P1/4P3/1P6/P1PP1P1P/NBRNKQBR w HChc -
 perft 1 23
 perft 2 555
 perft 3 14291
@@ -1550,7 +1550,7 @@ perft 5 9692630
 perft 6 247479180
 
 id 172
-epd nr1bkqbr/1p1pp1pp/pnp2p2/8/6P1/P1PP4/1P2PP1P/NRNBKQBR w HBhb - 0 9
+epd nr1bkqbr/1p1pp1pp/pnp2p2/8/6P1/P1PP4/1P2PP1P/NRNBKQBR w HBhb -
 perft 1 22
 perft 2 565
 perft 3 13343
@@ -1559,7 +1559,7 @@ perft 5 9305533
 perft 6 268612479
 
 id 173
-epd nr1kqbbr/np2pppp/p1p5/1B1p1P2/8/4P3/PPPP2PP/NRNKQ1BR w HBhb - 0 9
+epd nr1kqbbr/np2pppp/p1p5/1B1p1P2/8/4P3/PPPP2PP/NRNKQ1BR w HBhb -
 perft 1 32
 perft 2 730
 perft 3 23391
@@ -1568,7 +1568,7 @@ perft 5 18103280
 perft 6 454569900
 
 id 174
-epd nrnk1rbb/p1p2ppp/3pq3/Qp2p3/1P1P4/8/P1P1PPPP/NRN1KRBB w fb - 2 9
+epd nrnk1rbb/p1p2ppp/3pq3/Qp2p3/1P1P4/8/P1P1PPPP/NRN1KRBB w fb -
 perft 1 28
 perft 2 873
 perft 3 25683
@@ -1577,7 +1577,7 @@ perft 5 23868737
 perft 6 747991356
 
 id 175
-epd bbnrnkrq/pp1ppp1p/6p1/2p5/6P1/P5RP/1PPPPP2/BBNRNK1Q w Dgd - 3 9
+epd bbnrnkrq/pp1ppp1p/6p1/2p5/6P1/P5RP/1PPPPP2/BBNRNK1Q w Dgd -
 perft 1 37
 perft 2 1260
 perft 3 45060
@@ -1586,7 +1586,7 @@ perft 5 54843403
 perft 6 1898432768
 
 id 176
-epd bnrb1rkq/ppnpppp1/3Q4/2p4p/7P/N7/PPPPPPP1/B1RBNKR1 w GC - 2 9
+epd bnrb1rkq/ppnpppp1/3Q4/2p4p/7P/N7/PPPPPPP1/B1RBNKR1 w GC -
 perft 1 38
 perft 2 878
 perft 3 31944
@@ -1595,7 +1595,7 @@ perft 5 28784300
 perft 6 784569826
 
 id 177
-epd bnrnkbrq/p1ppppp1/1p5p/8/P2PP3/5P2/1PP3PP/BNRNKBRQ w GCgc - 1 9
+epd bnrnkbrq/p1ppppp1/1p5p/8/P2PP3/5P2/1PP3PP/BNRNKBRQ w GCgc -
 perft 1 26
 perft 2 617
 perft 3 16992
@@ -1604,7 +1604,7 @@ perft 5 11965544
 perft 6 311309576
 
 id 178
-epd bnrnkrqb/pp2p2p/2pp1pp1/8/P7/2PP1P2/1P2P1PP/BNRNKRQB w FCfc - 0 9
+epd bnrnkrqb/pp2p2p/2pp1pp1/8/P7/2PP1P2/1P2P1PP/BNRNKRQB w FCfc -
 perft 1 26
 perft 2 721
 perft 3 19726
@@ -1613,7 +1613,7 @@ perft 5 15966934
 perft 6 467132503
 
 id 179
-epd nbbrnkr1/1pppp1p1/p6q/P4p1p/8/5P2/1PPPP1PP/NBBRNRKQ w gd - 2 9
+epd nbbrnkr1/1pppp1p1/p6q/P4p1p/8/5P2/1PPPP1PP/NBBRNRKQ w gd -
 perft 1 18
 perft 2 556
 perft 3 10484
@@ -1622,7 +1622,7 @@ perft 5 6629293
 perft 6 202528241
 
 id 180
-epd nrb1nkrq/2pp1ppp/p4b2/1p2p3/P4B2/3P4/1PP1PPPP/NR1BNRKQ w gb - 0 9
+epd nrb1nkrq/2pp1ppp/p4b2/1p2p3/P4B2/3P4/1PP1PPPP/NR1BNRKQ w gb -
 perft 1 24
 perft 2 562
 perft 3 14017
@@ -1631,7 +1631,7 @@ perft 5 9227883
 perft 6 247634489
 
 id 181
-epd nrbnkbrq/p3p1pp/1p6/2pp1P2/8/3PP3/PPP2P1P/NRBNKBRQ w GBgb - 0 9
+epd nrbnkbrq/p3p1pp/1p6/2pp1P2/8/3PP3/PPP2P1P/NRBNKBRQ w GBgb -
 perft 1 31
 perft 2 746
 perft 3 24819
@@ -1640,7 +1640,7 @@ perft 5 21019301
 perft 6 542954168
 
 id 182
-epd nrbnkrqb/pppp1p1p/4p1p1/8/7P/2P1P3/PPNP1PP1/1RBNKRQB w FBfb - 0 9
+epd nrbnkrqb/pppp1p1p/4p1p1/8/7P/2P1P3/PPNP1PP1/1RBNKRQB w FBfb -
 perft 1 20
 perft 2 459
 perft 3 9998
@@ -1649,7 +1649,7 @@ perft 5 5760165
 perft 6 146614723
 
 id 183
-epd nbrn1krq/ppp1p2p/6b1/3p1pp1/8/4N1PP/PPPPPP2/NBR1BRKQ w gc - 1 9
+epd nbrn1krq/ppp1p2p/6b1/3p1pp1/8/4N1PP/PPPPPP2/NBR1BRKQ w gc -
 perft 1 27
 perft 2 835
 perft 3 23632
@@ -1658,7 +1658,7 @@ perft 5 22667987
 perft 6 760795567
 
 id 184
-epd nrnbbkrq/p1pp2pp/5p2/1p6/2P1pP1B/1P6/P2PP1PP/NRNB1KRQ w GBgb - 0 9
+epd nrnbbkrq/p1pp2pp/5p2/1p6/2P1pP1B/1P6/P2PP1PP/NRNB1KRQ w GBgb -
 perft 1 24
 perft 2 646
 perft 3 16102
@@ -1667,7 +1667,7 @@ perft 5 11489727
 perft 6 324948755
 
 id 185
-epd nrn1bbrq/1ppkppp1/p2p3p/8/1P3N2/4P3/P1PP1PPP/NR1KBBRQ w GB - 2 9
+epd nrn1bbrq/1ppkppp1/p2p3p/8/1P3N2/4P3/P1PP1PPP/NR1KBBRQ w GB -
 perft 1 32
 perft 2 591
 perft 3 18722
@@ -1676,7 +1676,7 @@ perft 5 12069159
 perft 6 269922838
 
 id 186
-epd n1krbrqb/1ppppppp/p7/8/4n3/P4P1P/1PPPPQP1/NRNKBR1B w FB - 2 9
+epd n1krbrqb/1ppppppp/p7/8/4n3/P4P1P/1PPPPQP1/NRNKBR1B w FB -
 perft 1 26
 perft 2 639
 perft 3 16988
@@ -1685,7 +1685,7 @@ perft 5 12167153
 perft 6 312633873
 
 id 187
-epd n1rnkrbq/1p1ppp1p/8/p1p1b1p1/3PQ1P1/4N3/PPP1PP1P/NBR1KRB1 w FCfc - 0 9
+epd n1rnkrbq/1p1ppp1p/8/p1p1b1p1/3PQ1P1/4N3/PPP1PP1P/NBR1KRB1 w FCfc -
 perft 1 35
 perft 2 1027
 perft 3 35731
@@ -1694,7 +1694,7 @@ perft 5 35738410
 perft 6 1060661628
 
 id 188
-epd nrnbkrbq/2pp1pp1/pp6/4p2p/P7/5PPP/1PPPP3/NRNBKRBQ w FBfb - 0 9
+epd nrnbkrbq/2pp1pp1/pp6/4p2p/P7/5PPP/1PPPP3/NRNBKRBQ w FBfb -
 perft 1 26
 perft 2 628
 perft 3 16731
@@ -1703,7 +1703,7 @@ perft 5 11920087
 perft 6 331498921
 
 id 189
-epd 1rnkrbbq/pp1p2pp/1n3p2/1Bp1p3/1P6/1N2P3/P1PP1PPP/1RNKR1BQ w EBeb - 0 9
+epd 1rnkrbbq/pp1p2pp/1n3p2/1Bp1p3/1P6/1N2P3/P1PP1PPP/1RNKR1BQ w EBeb -
 perft 1 33
 perft 2 992
 perft 3 32244
@@ -1712,7 +1712,7 @@ perft 5 31703749
 perft 6 980306735
 
 id 190
-epd nr1krqbb/p1ppppp1/8/1p5p/1Pn5/5P2/P1PPP1PP/NRNKRQBB w EBeb - 0 9
+epd nr1krqbb/p1ppppp1/8/1p5p/1Pn5/5P2/P1PPP1PP/NRNKRQBB w EBeb -
 perft 1 24
 perft 2 670
 perft 3 15985
@@ -1721,7 +1721,7 @@ perft 5 11371067
 perft 6 325556465
 
 id 191
-epd bbq1rkr1/1ppppppp/p1n2n2/8/2P2P2/1P6/PQ1PP1PP/BB1NRKNR w HEe - 3 9
+epd bbq1rkr1/1ppppppp/p1n2n2/8/2P2P2/1P6/PQ1PP1PP/BB1NRKNR w HEe -
 perft 1 32
 perft 2 794
 perft 3 26846
@@ -1730,7 +1730,7 @@ perft 5 24085223
 perft 6 645633370
 
 id 192
-epd b1nbrknr/1qppp1pp/p4p2/1p6/6P1/P2NP3/1PPP1P1P/BQ1BRKNR w HEhe - 1 9
+epd b1nbrknr/1qppp1pp/p4p2/1p6/6P1/P2NP3/1PPP1P1P/BQ1BRKNR w HEhe -
 perft 1 25
 perft 2 663
 perft 3 17138
@@ -1739,7 +1739,7 @@ perft 5 13157826
 perft 6 389603029
 
 id 193
-epd bqnrk1nr/pp2ppbp/6p1/2pp4/2P5/5P2/PPQPP1PP/B1NRKBNR w HDhd - 0 9
+epd bqnrk1nr/pp2ppbp/6p1/2pp4/2P5/5P2/PPQPP1PP/B1NRKBNR w HDhd -
 perft 1 26
 perft 2 850
 perft 3 22876
@@ -1748,7 +1748,7 @@ perft 5 21341087
 perft 6 719712622
 
 id 194
-epd bqnrknrb/1ppp1p1p/p7/6p1/1P2p3/P1PN4/3PPPPP/BQ1RKNRB w GDgd - 0 9
+epd bqnrknrb/1ppp1p1p/p7/6p1/1P2p3/P1PN4/3PPPPP/BQ1RKNRB w GDgd -
 perft 1 25
 perft 2 721
 perft 3 19290
@@ -1757,7 +1757,7 @@ perft 5 16391601
 perft 6 511725087
 
 id 195
-epd q1b1rknr/pp1pppp1/4n2p/2p1b3/1PP5/4P3/PQ1P1PPP/1BBNRKNR w HEhe - 1 9
+epd q1b1rknr/pp1pppp1/4n2p/2p1b3/1PP5/4P3/PQ1P1PPP/1BBNRKNR w HEhe -
 perft 1 32
 perft 2 975
 perft 3 32566
@@ -1766,7 +1766,7 @@ perft 5 32649943
 perft 6 962536105
 
 id 196
-epd qnbbrknr/1p1ppppp/8/p1p5/5P2/PP1P4/2P1P1PP/QNBBRKNR w HEhe - 0 9
+epd qnbbrknr/1p1ppppp/8/p1p5/5P2/PP1P4/2P1P1PP/QNBBRKNR w HEhe -
 perft 1 27
 perft 2 573
 perft 3 16331
@@ -1775,7 +1775,7 @@ perft 5 11562434
 perft 6 301166330
 
 id 197
-epd q1brkb1r/p1pppppp/np3B2/8/6n1/1P5N/P1PPPPPP/QN1RKB1R w HDhd - 0 9
+epd q1brkb1r/p1pppppp/np3B2/8/6n1/1P5N/P1PPPPPP/QN1RKB1R w HDhd -
 perft 1 32
 perft 2 984
 perft 3 31549
@@ -1784,7 +1784,7 @@ perft 5 32597704
 perft 6 1075429389
 
 id 198
-epd qn1rk1rb/p1pppppp/1p2n3/8/2b5/4NPP1/PPPPP1RP/QNBRK2B w Dgd - 4 9
+epd qn1rk1rb/p1pppppp/1p2n3/8/2b5/4NPP1/PPPPP1RP/QNBRK2B w Dgd -
 perft 1 22
 perft 2 802
 perft 3 19156
@@ -1793,7 +1793,7 @@ perft 5 17761431
 perft 6 650603534
 
 id 199
-epd qbnrbknr/ppp2p1p/8/3pp1p1/1PP1B3/5N2/P2PPPPP/Q1NRBK1R w HDhd - 0 9
+epd qbnrbknr/ppp2p1p/8/3pp1p1/1PP1B3/5N2/P2PPPPP/Q1NRBK1R w HDhd -
 perft 1 34
 perft 2 943
 perft 3 32506
@@ -1802,7 +1802,7 @@ perft 5 32523099
 perft 6 955802240
 
 id 200
-epd qnrbb1nr/pp1p1ppp/2p2k2/4p3/4P3/5PPP/PPPP4/QNRBBKNR w HC - 0 9
+epd qnrbb1nr/pp1p1ppp/2p2k2/4p3/4P3/5PPP/PPPP4/QNRBBKNR w HC -
 perft 1 20
 perft 2 460
 perft 3 10287
@@ -1811,7 +1811,7 @@ perft 5 5846781
 perft 6 140714047
 
 id 201
-epd qnr1bbnr/ppk1p1pp/3p4/2p2p2/8/2P5/PP1PPPPP/QNKRBBNR w - - 1 9
+epd qnr1bbnr/ppk1p1pp/3p4/2p2p2/8/2P5/PP1PPPPP/QNKRBBNR w - -
 perft 1 19
 perft 2 572
 perft 3 11834
@@ -1820,7 +1820,7 @@ perft 5 7994547
 perft 6 243724815
 
 id 202
-epd qnrkbnrb/1p1p1ppp/2p5/4p3/p7/N1BP4/PPP1PPPP/Q1R1KNRB w gc - 0 9
+epd qnrkbnrb/1p1p1ppp/2p5/4p3/p7/N1BP4/PPP1PPPP/Q1R1KNRB w gc -
 perft 1 27
 perft 2 579
 perft 3 16233
@@ -1829,7 +1829,7 @@ perft 5 10845146
 perft 6 268229097
 
 id 203
-epd qbnrkn1r/1pppp1p1/p3bp2/2BN3p/8/5P2/PPPPP1PP/QBNRK2R w HDhd - 0 9
+epd qbnrkn1r/1pppp1p1/p3bp2/2BN3p/8/5P2/PPPPP1PP/QBNRK2R w HDhd -
 perft 1 40
 perft 2 1027
 perft 3 38728
@@ -1838,7 +1838,7 @@ perft 5 38511307
 perft 6 1104094381
 
 id 204
-epd qnrbknbr/1pp2ppp/4p3/p6N/2p5/8/PPPPPPPP/Q1RBK1BR w HChc - 0 9
+epd qnrbknbr/1pp2ppp/4p3/p6N/2p5/8/PPPPPPPP/Q1RBK1BR w HChc -
 perft 1 22
 perft 2 510
 perft 3 11844
@@ -1847,7 +1847,7 @@ perft 5 7403327
 perft 6 200581103
 
 id 205
-epd 1qkrnbbr/p1pppppp/2n5/1p6/8/5NP1/PPPPPP1P/QNRK1BBR w HC - 4 9
+epd 1qkrnbbr/p1pppppp/2n5/1p6/8/5NP1/PPPPPP1P/QNRK1BBR w HC -
 perft 1 24
 perft 2 549
 perft 3 13987
@@ -1856,7 +1856,7 @@ perft 5 9396521
 perft 6 255676649
 
 id 206
-epd q1rknr1b/1ppppppb/2n5/p2B3p/8/1PN3P1/P1PPPP1P/Q1RKNRB1 w FCfc - 3 9
+epd q1rknr1b/1ppppppb/2n5/p2B3p/8/1PN3P1/P1PPPP1P/Q1RKNRB1 w FCfc -
 perft 1 31
 perft 2 924
 perft 3 28520
@@ -1865,7 +1865,7 @@ perft 5 27463479
 perft 6 847726572
 
 id 207
-epd bbnqrk1r/pp1pppp1/2p4p/8/6n1/1N1P1P2/PPP1P1PP/BBQ1RKNR w HEhe - 4 9
+epd bbnqrk1r/pp1pppp1/2p4p/8/6n1/1N1P1P2/PPP1P1PP/BBQ1RKNR w HEhe -
 perft 1 24
 perft 2 804
 perft 3 20147
@@ -1874,7 +1874,7 @@ perft 5 18024195
 perft 6 595947631
 
 id 208
-epd bn1brknr/ppp1p1pp/5p2/3p4/6qQ/3P3P/PPP1PPP1/BN1BRKNR w HEhe - 4 9
+epd bn1brknr/ppp1p1pp/5p2/3p4/6qQ/3P3P/PPP1PPP1/BN1BRKNR w HEhe -
 perft 1 25
 perft 2 854
 perft 3 22991
@@ -1883,7 +1883,7 @@ perft 5 20290974
 perft 6 600195008
 
 id 209
-epd 1nqrkbnr/2pp1ppp/pp2p3/3b4/2P5/N7/PP1PPPPP/B1QRKBNR w HDhd - 0 9
+epd 1nqrkbnr/2pp1ppp/pp2p3/3b4/2P5/N7/PP1PPPPP/B1QRKBNR w HDhd -
 perft 1 22
 perft 2 651
 perft 3 16173
@@ -1892,7 +1892,7 @@ perft 5 13133439
 perft 6 390886040
 
 id 210
-epd bnqrk1rb/1pp1pppp/p2p4/4n3/2PPP3/8/PP3PPP/BNQRKNRB w GDgd - 1 9
+epd bnqrk1rb/1pp1pppp/p2p4/4n3/2PPP3/8/PP3PPP/BNQRKNRB w GDgd -
 perft 1 30
 perft 2 950
 perft 3 28169
@@ -1901,7 +1901,7 @@ perft 5 27610213
 perft 6 880739164
 
 id 211
-epd nbb1rknr/1ppq1ppp/3p4/p3p3/4P3/1N2R3/PPPP1PPP/1BBQ1KNR w Hhe - 2 9
+epd nbb1rknr/1ppq1ppp/3p4/p3p3/4P3/1N2R3/PPPP1PPP/1BBQ1KNR w Hhe -
 perft 1 33
 perft 2 988
 perft 3 31293
@@ -1910,7 +1910,7 @@ perft 5 30894863
 perft 6 985384035
 
 id 212
-epd nqbbrknr/2ppp2p/pp4p1/5p2/7P/3P1P2/PPPBP1P1/NQ1BRKNR w HEhe - 0 9
+epd nqbbrknr/2ppp2p/pp4p1/5p2/7P/3P1P2/PPPBP1P1/NQ1BRKNR w HEhe -
 perft 1 27
 perft 2 492
 perft 3 13266
@@ -1919,7 +1919,7 @@ perft 5 7583292
 perft 6 175376176
 
 id 213
-epd 1qbrkb1r/pppppppp/8/3n4/4P1n1/PN6/1PPP1P1P/1QBRKBNR w HDhd - 3 9
+epd 1qbrkb1r/pppppppp/8/3n4/4P1n1/PN6/1PPP1P1P/1QBRKBNR w HDhd -
 perft 1 28
 perft 2 800
 perft 3 21982
@@ -1928,7 +1928,7 @@ perft 5 17313279
 perft 6 507140861
 
 id 214
-epd 1qbrknrb/1p1ppppp/1np5/8/p4P1P/4P1N1/PPPP2P1/NQBRK1RB w GDgd - 0 9
+epd 1qbrknrb/1p1ppppp/1np5/8/p4P1P/4P1N1/PPPP2P1/NQBRK1RB w GDgd -
 perft 1 21
 perft 2 482
 perft 3 10581
@@ -1937,7 +1937,7 @@ perft 5 6218644
 perft 6 168704845
 
 id 215
-epd nbqrbkr1/ppp1pppp/8/3p4/6n1/2P2PPN/PP1PP2P/NBQRBK1R w HDd - 1 9
+epd nbqrbkr1/ppp1pppp/8/3p4/6n1/2P2PPN/PP1PP2P/NBQRBK1R w HDd -
 perft 1 29
 perft 2 921
 perft 3 25748
@@ -1946,7 +1946,7 @@ perft 5 24138518
 perft 6 806554650
 
 id 216
-epd nqrb1knr/1ppbpp1p/p7/3p2p1/2P3P1/5P1P/PP1PP3/NQRBBKNR w HChc - 1 9
+epd nqrb1knr/1ppbpp1p/p7/3p2p1/2P3P1/5P1P/PP1PP3/NQRBBKNR w HChc -
 perft 1 31
 perft 2 803
 perft 3 25857
@@ -1955,7 +1955,7 @@ perft 5 21998733
 perft 6 583349773
 
 id 217
-epd 1qrkbbr1/pppp1ppp/1n3n2/4p3/5P2/1N6/PPPPP1PP/1QRKBBNR w HCc - 0 9
+epd 1qrkbbr1/pppp1ppp/1n3n2/4p3/5P2/1N6/PPPPP1PP/1QRKBBNR w HCc -
 perft 1 25
 perft 2 715
 perft 3 19118
@@ -1964,7 +1964,7 @@ perft 5 15514933
 perft 6 459533767
 
 id 218
-epd nqrkb1rb/pp2pppp/2p1n3/3p4/3PP1N1/8/PPP2PPP/NQRKB1RB w GCgc - 0 9
+epd nqrkb1rb/pp2pppp/2p1n3/3p4/3PP1N1/8/PPP2PPP/NQRKB1RB w GCgc -
 perft 1 26
 perft 2 795
 perft 3 21752
@@ -1973,7 +1973,7 @@ perft 5 19185851
 perft 6 616508881
 
 id 219
-epd nb1rknbr/pp2ppp1/8/2Bp3p/6P1/2P2P1q/PP1PP2P/NBQRKN1R w HDhd - 0 9
+epd nb1rknbr/pp2ppp1/8/2Bp3p/6P1/2P2P1q/PP1PP2P/NBQRKN1R w HDhd -
 perft 1 35
 perft 2 1391
 perft 3 43025
@@ -1982,7 +1982,7 @@ perft 5 53033675
 perft 6 2139267832
 
 id 220
-epd nqrbkn1r/pp1pp1pp/8/2p2p2/5P2/P3B2P/1PbPP1P1/NQRBKN1R w HChc - 0 9
+epd nqrbkn1r/pp1pp1pp/8/2p2p2/5P2/P3B2P/1PbPP1P1/NQRBKN1R w HChc -
 perft 1 23
 perft 2 758
 perft 3 19439
@@ -1991,7 +1991,7 @@ perft 5 18296195
 perft 6 628403401
 
 id 221
-epd nqrknbbr/pp1pppp1/7p/2p5/7P/1P1N4/P1PPPPPB/NQRK1B1R w HChc - 2 9
+epd nqrknbbr/pp1pppp1/7p/2p5/7P/1P1N4/P1PPPPPB/NQRK1B1R w HChc -
 perft 1 29
 perft 2 824
 perft 3 23137
@@ -2000,7 +2000,7 @@ perft 5 19429491
 perft 6 595493802
 
 id 222
-epd 1qrknrbb/B1p1pppp/8/1p1p4/2n2P2/1P6/P1PPP1PP/NQRKNR1B w FCfc - 0 9
+epd 1qrknrbb/B1p1pppp/8/1p1p4/2n2P2/1P6/P1PPP1PP/NQRKNR1B w FCfc -
 perft 1 28
 perft 2 771
 perft 3 20237
@@ -2009,7 +2009,7 @@ perft 5 16065378
 perft 6 483037840
 
 id 223
-epd bbnrqk1r/1ppppppp/8/7n/1p6/P6P/1BPPPPP1/1BNRQKNR w HDhd - 0 9
+epd bbnrqk1r/1ppppppp/8/7n/1p6/P6P/1BPPPPP1/1BNRQKNR w HDhd -
 perft 1 25
 perft 2 601
 perft 3 15471
@@ -2018,7 +2018,7 @@ perft 5 10697065
 perft 6 289472497
 
 id 224
-epd bnrbqknr/ppp3p1/3ppp1Q/7p/3P4/1P6/P1P1PPPP/BNRB1KNR w HChc - 0 9
+epd bnrbqknr/ppp3p1/3ppp1Q/7p/3P4/1P6/P1P1PPPP/BNRB1KNR w HChc -
 perft 1 32
 perft 2 845
 perft 3 26876
@@ -2027,7 +2027,7 @@ perft 5 23717883
 perft 6 682154649
 
 id 225
-epd bn1qkb1r/pprppppp/8/2p5/2PPP1n1/8/PPR2PPP/BN1QKBNR w Hh - 1 9
+epd bn1qkb1r/pprppppp/8/2p5/2PPP1n1/8/PPR2PPP/BN1QKBNR w Hh -
 perft 1 32
 perft 2 856
 perft 3 27829
@@ -2036,7 +2036,7 @@ perft 5 25245957
 perft 6 727424329
 
 id 226
-epd 1nrqknrb/p1pp1ppp/1p2p3/3N4/5P1P/5b2/PPPPP3/B1RQKNRB w GCgc - 2 9
+epd 1nrqknrb/p1pp1ppp/1p2p3/3N4/5P1P/5b2/PPPPP3/B1RQKNRB w GCgc -
 perft 1 33
 perft 2 873
 perft 3 27685
@@ -2045,7 +2045,7 @@ perft 5 25128076
 perft 6 745401024
 
 id 227
-epd nbbrqrk1/pppppppp/8/2N1n3/P7/6P1/1PPPPP1P/1BBRQKNR w HD - 3 9
+epd nbbrqrk1/pppppppp/8/2N1n3/P7/6P1/1PPPPP1P/1BBRQKNR w HD -
 perft 1 25
 perft 2 555
 perft 3 14339
@@ -2054,7 +2054,7 @@ perft 5 9153089
 perft 6 234841945
 
 id 228
-epd 1rbbqknr/1ppp1pp1/1n2p3/p6p/4P1P1/P6N/1PPP1P1P/NRBBQK1R w HBhb - 0 9
+epd 1rbbqknr/1ppp1pp1/1n2p3/p6p/4P1P1/P6N/1PPP1P1P/NRBBQK1R w HBhb -
 perft 1 25
 perft 2 693
 perft 3 18652
@@ -2063,7 +2063,7 @@ perft 5 15133381
 perft 6 439344945
 
 id 229
-epd nrq1kbnr/p1pbpppp/3p4/1p6/6P1/1N3N2/PPPPPP1P/1RBQKB1R w HBhb - 4 9
+epd nrq1kbnr/p1pbpppp/3p4/1p6/6P1/1N3N2/PPPPPP1P/1RBQKB1R w HBhb -
 perft 1 24
 perft 2 648
 perft 3 16640
@@ -2072,7 +2072,7 @@ perft 5 12871967
 perft 6 380436777
 
 id 230
-epd nr1qknr1/p1pppp1p/b5p1/1p6/8/P4PP1/1bPPP1RP/NRBQKN1B w Bgb - 0 9
+epd nr1qknr1/p1pppp1p/b5p1/1p6/8/P4PP1/1bPPP1RP/NRBQKN1B w Bgb -
 perft 1 18
 perft 2 533
 perft 3 11215
@@ -2081,7 +2081,7 @@ perft 5 7777833
 perft 6 234905172
 
 id 231
-epd nbrqbknr/1ppp2pp/8/4pp2/p2PP1P1/7N/PPP2P1P/NBRQBK1R w HChc - 0 9
+epd nbrqbknr/1ppp2pp/8/4pp2/p2PP1P1/7N/PPP2P1P/NBRQBK1R w HChc -
 perft 1 29
 perft 2 803
 perft 3 24416
@@ -2090,7 +2090,7 @@ perft 5 22305910
 perft 6 672322762
 
 id 232
-epd nr1b1k1r/ppp1pppp/2bp1n2/6P1/2P3q1/5P2/PP1PP2P/NRQBBKNR w HBhb - 1 9
+epd nr1b1k1r/ppp1pppp/2bp1n2/6P1/2P3q1/5P2/PP1PP2P/NRQBBKNR w HBhb -
 perft 1 27
 perft 2 1199
 perft 3 30908
@@ -2099,7 +2099,7 @@ perft 5 35121759
 perft 6 1418677099
 
 id 233
-epd nrqkbbnr/2pppp1p/p7/1p6/2P1Pp2/8/PPNP2PP/1RQKBBNR w HBhb - 0 9
+epd nrqkbbnr/2pppp1p/p7/1p6/2P1Pp2/8/PPNP2PP/1RQKBBNR w HBhb -
 perft 1 28
 perft 2 613
 perft 3 17874
@@ -2108,7 +2108,7 @@ perft 5 13097064
 perft 6 345294379
 
 id 234
-epd 1rqkbnrb/pp1ppp1p/1n4p1/B1p5/3PP3/4N3/PPP2PPP/NRQK2RB w GBgb - 0 9
+epd 1rqkbnrb/pp1ppp1p/1n4p1/B1p5/3PP3/4N3/PPP2PPP/NRQK2RB w GBgb -
 perft 1 33
 perft 2 723
 perft 3 23991
@@ -2117,7 +2117,7 @@ perft 5 19715083
 perft 6 535650233
 
 id 235
-epd nbrqkn1r/1pppp2p/5pp1/p2b4/5P2/P2PN3/1PP1P1PP/NBRQK1BR w HChc - 2 9
+epd nbrqkn1r/1pppp2p/5pp1/p2b4/5P2/P2PN3/1PP1P1PP/NBRQK1BR w HChc -
 perft 1 23
 perft 2 607
 perft 3 15482
@@ -2126,7 +2126,7 @@ perft 5 11026383
 perft 6 290708878
 
 id 236
-epd nrqbknbr/pp1pppp1/8/2p4p/P3PP2/8/1PPP2PP/NRQBKNBR w HBhb - 1 9
+epd nrqbknbr/pp1pppp1/8/2p4p/P3PP2/8/1PPP2PP/NRQBKNBR w HBhb -
 perft 1 26
 perft 2 700
 perft 3 19371
@@ -2135,7 +2135,7 @@ perft 5 16058815
 perft 6 485460242
 
 id 237
-epd nrqknbbr/p2pppp1/1pp5/6Qp/3P4/1P3P2/P1P1P1PP/NR1KNBBR w HBhb - 0 9
+epd nrqknbbr/p2pppp1/1pp5/6Qp/3P4/1P3P2/P1P1P1PP/NR1KNBBR w HBhb -
 perft 1 40
 perft 2 905
 perft 3 32932
@@ -2144,7 +2144,7 @@ perft 5 29263502
 perft 6 791963709
 
 id 238
-epd nrqknrbb/1p3ppp/p2p4/2p1p3/1P6/3PP1P1/P1P2P1P/NRQKNRBB w FBfb - 0 9
+epd nrqknrbb/1p3ppp/p2p4/2p1p3/1P6/3PP1P1/P1P2P1P/NRQKNRBB w FBfb -
 perft 1 29
 perft 2 780
 perft 3 22643
@@ -2153,7 +2153,7 @@ perft 5 19532077
 perft 6 593181101
 
 id 239
-epd 1bnrkqnr/p1pppp2/7p/1p4p1/4b3/7N/PPPP1PPP/BBNRKQ1R w HDhd - 0 9
+epd 1bnrkqnr/p1pppp2/7p/1p4p1/4b3/7N/PPPP1PPP/BBNRKQ1R w HDhd -
 perft 1 25
 perft 2 725
 perft 3 19808
@@ -2162,7 +2162,7 @@ perft 5 16661676
 perft 6 487354613
 
 id 240
-epd bnrbkq1r/pp2p1pp/5n2/2pp1p2/P7/N1PP4/1P2PPPP/B1RBKQNR w HChc - 1 9
+epd bnrbkq1r/pp2p1pp/5n2/2pp1p2/P7/N1PP4/1P2PPPP/B1RBKQNR w HChc -
 perft 1 24
 perft 2 745
 perft 3 18494
@@ -2171,7 +2171,7 @@ perft 5 15079602
 perft 6 488924040
 
 id 241
-epd 2rkqbnr/p1pppppp/2b5/1pn5/1P3P1Q/2B5/P1PPP1PP/1NRK1BNR w HChc - 3 9
+epd 2rkqbnr/p1pppppp/2b5/1pn5/1P3P1Q/2B5/P1PPP1PP/1NRK1BNR w HChc -
 perft 1 33
 perft 2 904
 perft 3 30111
@@ -2180,7 +2180,7 @@ perft 5 28194726
 perft 6 801757709
 
 id 242
-epd bnrkqnrb/2pppp2/8/pp4pp/1P5P/6P1/P1PPPPB1/BNRKQNR1 w GCgc - 0 9
+epd bnrkqnrb/2pppp2/8/pp4pp/1P5P/6P1/P1PPPPB1/BNRKQNR1 w GCgc -
 perft 1 34
 perft 2 1059
 perft 3 34090
@@ -2189,7 +2189,7 @@ perft 5 33195397
 perft 6 1036498304
 
 id 243
-epd 1bbrkq1r/pppp2pp/1n2pp1n/8/2PP4/1N4P1/PP2PP1P/1BBRKQNR w HDhd - 1 9
+epd 1bbrkq1r/pppp2pp/1n2pp1n/8/2PP4/1N4P1/PP2PP1P/1BBRKQNR w HDhd -
 perft 1 33
 perft 2 891
 perft 3 28907
@@ -2198,7 +2198,7 @@ perft 5 26970098
 perft 6 788040469
 
 id 244
-epd nrbbkqnr/1p2pp1p/p1p3p1/3p4/8/1PP5/P2PPPPP/NRBBKQNR w HBhb - 0 9
+epd nrbbkqnr/1p2pp1p/p1p3p1/3p4/8/1PP5/P2PPPPP/NRBBKQNR w HBhb -
 perft 1 21
 perft 2 567
 perft 3 13212
@@ -2207,7 +2207,7 @@ perft 5 9539687
 perft 6 284426039
 
 id 245
-epd 1rbkqbr1/ppp1pppp/1n5n/3p4/3P4/1PP3P1/P3PP1P/NRBKQBNR w HBb - 1 9
+epd 1rbkqbr1/ppp1pppp/1n5n/3p4/3P4/1PP3P1/P3PP1P/NRBKQBNR w HBb -
 perft 1 27
 perft 2 752
 perft 3 20686
@@ -2216,7 +2216,7 @@ perft 5 16986290
 perft 6 521817800
 
 id 246
-epd nrbkq1rb/1ppp1pp1/4p1n1/p6p/2PP4/5P2/PPK1P1PP/NRB1QNRB w gb - 0 9
+epd nrbkq1rb/1ppp1pp1/4p1n1/p6p/2PP4/5P2/PPK1P1PP/NRB1QNRB w gb -
 perft 1 35
 perft 2 697
 perft 3 23678
@@ -2225,7 +2225,7 @@ perft 5 16906409
 perft 6 390324794
 
 id 247
-epd nbrkbqnr/p2pp1p1/5p2/1pp4p/7P/3P2P1/PPP1PP2/NBKRBQNR w hc - 0 9
+epd nbrkbqnr/p2pp1p1/5p2/1pp4p/7P/3P2P1/PPP1PP2/NBKRBQNR w hc -
 perft 1 25
 perft 2 679
 perft 3 17223
@@ -2234,7 +2234,7 @@ perft 5 12879258
 perft 6 376652259
 
 id 248
-epd nrkb1qnr/ppppp1p1/6bp/5p2/1PP1P1P1/8/P2P1P1P/NRKBBQNR w HBhb - 1 9
+epd nrkb1qnr/ppppp1p1/6bp/5p2/1PP1P1P1/8/P2P1P1P/NRKBBQNR w HBhb -
 perft 1 32
 perft 2 761
 perft 3 24586
@@ -2243,7 +2243,7 @@ perft 5 20671433
 perft 6 568524724
 
 id 249
-epd nrk1bbnr/p1q1pppp/1ppp4/8/3P3P/4K3/PPP1PPP1/NR1QBBNR w hb - 0 9
+epd nrk1bbnr/p1q1pppp/1ppp4/8/3P3P/4K3/PPP1PPP1/NR1QBBNR w hb -
 perft 1 30
 perft 2 719
 perft 3 21683
@@ -2252,7 +2252,7 @@ perft 5 16278120
 perft 6 423649784
 
 id 250
-epd nrkqbr1b/1pppp1pp/5pn1/p6N/1P3P2/8/P1PPP1PP/NRKQB1RB w GBb - 0 9
+epd nrkqbr1b/1pppp1pp/5pn1/p6N/1P3P2/8/P1PPP1PP/NRKQB1RB w GBb -
 perft 1 26
 perft 2 494
 perft 3 13815
@@ -2261,7 +2261,7 @@ perft 5 8763742
 perft 6 206993496
 
 id 251
-epd nbrkq2r/pppp1bpp/4p1n1/5p2/7P/2P3N1/PP1PPPP1/NBKRQ1BR w hc - 0 9
+epd nbrkq2r/pppp1bpp/4p1n1/5p2/7P/2P3N1/PP1PPPP1/NBKRQ1BR w hc -
 perft 1 27
 perft 2 701
 perft 3 19536
@@ -2270,7 +2270,7 @@ perft 5 15394667
 perft 6 443506342
 
 id 252
-epd nrkbqnbr/2ppp2p/pp6/5pp1/P1P5/8/1P1PPPPP/NRKBQNBR w HBhb - 0 9
+epd nrkbqnbr/2ppp2p/pp6/5pp1/P1P5/8/1P1PPPPP/NRKBQNBR w HBhb -
 perft 1 21
 perft 2 487
 perft 3 11341
@@ -2279,7 +2279,7 @@ perft 5 7218486
 perft 6 193586674
 
 id 253
-epd nr1qnbbr/pk1pppp1/1pp4p/8/3P4/5P1P/PPP1P1P1/NRKQNBBR w HB - 0 9
+epd nr1qnbbr/pk1pppp1/1pp4p/8/3P4/5P1P/PPP1P1P1/NRKQNBBR w HB -
 perft 1 22
 perft 2 546
 perft 3 13615
@@ -2288,7 +2288,7 @@ perft 5 9587439
 perft 6 259830255
 
 id 254
-epd nrkq1rbb/pp1ppp1p/2pn4/8/PP3Pp1/7P/2PPP1P1/NRKQNRBB w FBfb - 0 9
+epd nrkq1rbb/pp1ppp1p/2pn4/8/PP3Pp1/7P/2PPP1P1/NRKQNRBB w FBfb -
 perft 1 26
 perft 2 839
 perft 3 22075
@@ -2297,7 +2297,7 @@ perft 5 19867117
 perft 6 658535326
 
 id 255
-epd b2rknqr/pp1ppppp/8/2P5/n7/P7/1PPNPPPb/BBNRK1QR w HDhd - 2 9
+epd b2rknqr/pp1ppppp/8/2P5/n7/P7/1PPNPPPb/BBNRK1QR w HDhd -
 perft 1 24
 perft 2 699
 perft 3 19523
@@ -2306,7 +2306,7 @@ perft 5 17734818
 perft 6 535094237
 
 id 256
-epd bnrbknqr/pp2p2p/2p3p1/3p1p2/8/3P4/PPPNPPPP/B1RBKNQR w HChc - 0 9
+epd bnrbknqr/pp2p2p/2p3p1/3p1p2/8/3P4/PPPNPPPP/B1RBKNQR w HChc -
 perft 1 23
 perft 2 580
 perft 3 14320
@@ -2315,7 +2315,7 @@ perft 5 10133092
 perft 6 288041554
 
 id 257
-epd bnrknb1r/pppp2pp/8/4pp2/6P1/3P3P/qPP1PPQ1/BNRKNB1R w HChc - 0 9
+epd bnrknb1r/pppp2pp/8/4pp2/6P1/3P3P/qPP1PPQ1/BNRKNB1R w HChc -
 perft 1 28
 perft 2 1100
 perft 3 31813
@@ -2324,7 +2324,7 @@ perft 5 36142423
 perft 6 1361341249
 
 id 258
-epd b1rknqrb/ppp1p1p1/2np1p1p/8/4N3/6PQ/PPPPPP1P/B1RKN1RB w GCgc - 0 9
+epd b1rknqrb/ppp1p1p1/2np1p1p/8/4N3/6PQ/PPPPPP1P/B1RKN1RB w GCgc -
 perft 1 36
 perft 2 629
 perft 3 23082
@@ -2333,7 +2333,7 @@ perft 5 16897544
 perft 6 367503974
 
 id 259
-epd nb1rknqr/pbppp2p/6p1/1p3p2/5P2/3KP3/PPPP2PP/NBBR1NQR w hd - 2 9
+epd nb1rknqr/pbppp2p/6p1/1p3p2/5P2/3KP3/PPPP2PP/NBBR1NQR w hd -
 perft 1 18
 perft 2 557
 perft 3 9779
@@ -2342,7 +2342,7 @@ perft 5 5822387
 perft 6 180936551
 
 id 260
-epd nr1bknqr/1ppb1ppp/p7/3pp3/B7/2P3NP/PP1PPPP1/NRB1K1QR w HBhb - 2 9
+epd nr1bknqr/1ppb1ppp/p7/3pp3/B7/2P3NP/PP1PPPP1/NRB1K1QR w HBhb -
 perft 1 28
 perft 2 688
 perft 3 19541
@@ -2351,7 +2351,7 @@ perft 5 15153092
 perft 6 425149249
 
 id 261
-epd nrbkn2r/pppp1pqp/4p1p1/8/3P2P1/P3B3/P1P1PP1P/NR1KNBQR w HBhb - 1 9
+epd nrbkn2r/pppp1pqp/4p1p1/8/3P2P1/P3B3/P1P1PP1P/NR1KNBQR w HBhb -
 perft 1 32
 perft 2 808
 perft 3 25578
@@ -2360,7 +2360,7 @@ perft 5 22094260
 perft 6 609377239
 
 id 262
-epd nrbknqrb/2p1ppp1/1p6/p2p2Bp/1P6/3P1P2/P1P1P1PP/NR1KNQRB w GBgb - 0 9
+epd nrbknqrb/2p1ppp1/1p6/p2p2Bp/1P6/3P1P2/P1P1P1PP/NR1KNQRB w GBgb -
 perft 1 30
 perft 2 625
 perft 3 18288
@@ -2369,7 +2369,7 @@ perft 5 12225742
 perft 6 301834282
 
 id 263
-epd nbr1knqr/1pp1p1pp/3p1pb1/8/7P/5P2/PPPPPQP1/NBRKBN1R w HC - 2 9
+epd nbr1knqr/1pp1p1pp/3p1pb1/8/7P/5P2/PPPPPQP1/NBRKBN1R w HC -
 perft 1 29
 perft 2 863
 perft 3 25767
@@ -2378,7 +2378,7 @@ perft 5 24965592
 perft 6 799182442
 
 id 264
-epd n1kbbnqr/prp2ppp/1p1p4/4p3/1P2P3/3P1B2/P1P2PPP/NRK1BNQR w HBh - 2 9
+epd n1kbbnqr/prp2ppp/1p1p4/4p3/1P2P3/3P1B2/P1P2PPP/NRK1BNQR w HBh -
 perft 1 26
 perft 2 653
 perft 3 17020
@@ -2387,7 +2387,7 @@ perft 5 12187583
 perft 6 336872952
 
 id 265
-epd nrknbbqr/pp3p1p/B3p1p1/2pp4/4P3/2N3P1/PPPP1P1P/NRK1B1QR w HBhb - 0 9
+epd nrknbbqr/pp3p1p/B3p1p1/2pp4/4P3/2N3P1/PPPP1P1P/NRK1B1QR w HBhb -
 perft 1 29
 perft 2 683
 perft 3 19755
@@ -2396,7 +2396,7 @@ perft 5 14684565
 perft 6 394951291
 
 id 266
-epd n1knbqrb/pr1p1ppp/Qp6/2p1p3/4P3/6P1/PPPP1P1P/NRKNB1RB w GBg - 2 9
+epd n1knbqrb/pr1p1ppp/Qp6/2p1p3/4P3/6P1/PPPP1P1P/NRKNB1RB w GBg -
 perft 1 31
 perft 2 552
 perft 3 17197
@@ -2405,7 +2405,7 @@ perft 5 11663330
 perft 6 283583340
 
 id 267
-epd nbrknqbr/p3p1pp/1p1p1p2/2p5/2Q1PP2/8/PPPP2PP/NBRKN1BR w HChc - 0 9
+epd nbrknqbr/p3p1pp/1p1p1p2/2p5/2Q1PP2/8/PPPP2PP/NBRKN1BR w HChc -
 perft 1 37
 perft 2 913
 perft 3 32470
@@ -2414,7 +2414,7 @@ perft 5 28899548
 perft 6 759875563
 
 id 268
-epd nrkb1qbr/pp1pppp1/5n2/7p/2p5/1N1NPP2/PPPP2PP/1RKB1QBR w HBhb - 0 9
+epd nrkb1qbr/pp1pppp1/5n2/7p/2p5/1N1NPP2/PPPP2PP/1RKB1QBR w HBhb -
 perft 1 25
 perft 2 712
 perft 3 18813
@@ -2423,7 +2423,7 @@ perft 5 15045589
 perft 6 445074372
 
 id 269
-epd nrk2bbr/pppqpppp/3p4/8/1P3nP1/3P4/P1P1PP1P/NRKNQBBR w HBhb - 1 9
+epd nrk2bbr/pppqpppp/3p4/8/1P3nP1/3P4/P1P1PP1P/NRKNQBBR w HBhb -
 perft 1 24
 perft 2 814
 perft 3 19954
@@ -2432,7 +2432,7 @@ perft 5 17603960
 perft 6 592121050
 
 id 270
-epd nrknqrbb/1p2ppp1/2pp4/Q6p/P2P3P/8/1PP1PPP1/NRKN1RBB w FBfb - 0 9
+epd nrknqrbb/1p2ppp1/2pp4/Q6p/P2P3P/8/1PP1PPP1/NRKN1RBB w FBfb -
 perft 1 34
 perft 2 513
 perft 3 16111
@@ -2441,7 +2441,7 @@ perft 5 9569590
 perft 6 206509331
 
 id 271
-epd bbnrk1rq/pp2p1pp/2ppn3/5p2/8/3NNP1P/PPPPP1P1/BB1RK1RQ w GDgd - 1 9
+epd bbnrk1rq/pp2p1pp/2ppn3/5p2/8/3NNP1P/PPPPP1P1/BB1RK1RQ w GDgd -
 perft 1 28
 perft 2 697
 perft 3 20141
@@ -2450,7 +2450,7 @@ perft 5 15301879
 perft 6 410843713
 
 id 272
-epd bnrbknrq/ppppp2p/6p1/5p2/4QPP1/8/PPPPP2P/BNRBKNR1 w GCgc - 0 9
+epd bnrbknrq/ppppp2p/6p1/5p2/4QPP1/8/PPPPP2P/BNRBKNR1 w GCgc -
 perft 1 37
 perft 2 901
 perft 3 32612
@@ -2459,7 +2459,7 @@ perft 5 31385912
 perft 6 903831981
 
 id 273
-epd bnkrnbrq/ppppp1p1/B6p/5p2/8/4P3/PPPP1PPP/BNKRN1RQ w - - 0 9
+epd bnkrnbrq/ppppp1p1/B6p/5p2/8/4P3/PPPP1PPP/BNKRN1RQ w - -
 perft 1 26
 perft 2 417
 perft 3 11124
@@ -2468,7 +2468,7 @@ perft 5 5980981
 perft 6 133080499
 
 id 274
-epd bnrk1rqb/2pppp1p/3n4/pp4p1/3Q1P2/2N3P1/PPPPP2P/B1RKNR1B w FCfc - 0 9
+epd bnrk1rqb/2pppp1p/3n4/pp4p1/3Q1P2/2N3P1/PPPPP2P/B1RKNR1B w FCfc -
 perft 1 49
 perft 2 1655
 perft 3 74590
@@ -2477,7 +2477,7 @@ perft 5 107234294
 perft 6 3651608327
 
 id 275
-epd nbbrk1rq/pp2pppp/2pp4/8/2P2n2/6N1/PP1PP1PP/NBBRKR1Q w Dgd - 0 9
+epd nbbrk1rq/pp2pppp/2pp4/8/2P2n2/6N1/PP1PP1PP/NBBRKR1Q w Dgd -
 perft 1 28
 perft 2 960
 perft 3 26841
@@ -2486,7 +2486,7 @@ perft 5 26083252
 perft 6 846682836
 
 id 276
-epd nrbb2rq/pppk1ppp/4p1n1/3p4/6P1/1BP5/PP1PPPQP/NRB1KNR1 w GB - 0 9
+epd nrbb2rq/pppk1ppp/4p1n1/3p4/6P1/1BP5/PP1PPPQP/NRB1KNR1 w GB -
 perft 1 28
 perft 2 735
 perft 3 22048
@@ -2495,7 +2495,7 @@ perft 5 18588316
 perft 6 512048946
 
 id 277
-epd nrbk1brq/p1ppppp1/7p/1p6/4P1nP/P7/1PPP1PP1/NRBKNBRQ w GBgb - 0 9
+epd nrbk1brq/p1ppppp1/7p/1p6/4P1nP/P7/1PPP1PP1/NRBKNBRQ w GBgb -
 perft 1 22
 perft 2 572
 perft 3 12739
@@ -2504,7 +2504,7 @@ perft 5 8525056
 perft 6 247615348
 
 id 278
-epd nrbk1rqb/1pp2ppp/5n2/p2pp3/5B2/1N1P2P1/PPP1PP1P/1R1KNRQB w FBfb - 0 9
+epd nrbk1rqb/1pp2ppp/5n2/p2pp3/5B2/1N1P2P1/PPP1PP1P/1R1KNRQB w FBfb -
 perft 1 35
 perft 2 927
 perft 3 31559
@@ -2513,7 +2513,7 @@ perft 5 28465693
 perft 6 783048748
 
 id 279
-epd nbrkb1rq/p1pp1ppp/4n3/4p3/Pp6/6N1/1PPPPPPP/NBRKBRQ1 w Cgc - 0 9
+epd nbrkb1rq/p1pp1ppp/4n3/4p3/Pp6/6N1/1PPPPPPP/NBRKBRQ1 w Cgc -
 perft 1 20
 perft 2 456
 perft 3 10271
@@ -2522,7 +2522,7 @@ perft 5 6124625
 perft 6 154766108
 
 id 280
-epd nrkb1nrq/p2pp1pp/1pp2p2/7b/6PP/5P2/PPPPP2N/NRKBB1RQ w GBgb - 0 9
+epd nrkb1nrq/p2pp1pp/1pp2p2/7b/6PP/5P2/PPPPP2N/NRKBB1RQ w GBgb -
 perft 1 21
 perft 2 479
 perft 3 11152
@@ -2531,7 +2531,7 @@ perft 5 6696458
 perft 6 165253524
 
 id 281
-epd nr1nbbr1/pppkpp1p/6p1/3p4/P6P/1P6/1RPPPPP1/N1KNBBRQ w G - 1 9
+epd nr1nbbr1/pppkpp1p/6p1/3p4/P6P/1P6/1RPPPPP1/N1KNBBRQ w G -
 perft 1 20
 perft 2 498
 perft 3 11304
@@ -2540,7 +2540,7 @@ perft 5 7197322
 perft 6 188021682
 
 id 282
-epd nrknbrqb/3p1ppp/ppN1p3/8/6P1/8/PPPPPP1P/1RKNBRQB w FBfb - 0 9
+epd nrknbrqb/3p1ppp/ppN1p3/8/6P1/8/PPPPPP1P/1RKNBRQB w FBfb -
 perft 1 32
 perft 2 526
 perft 3 17267
@@ -2549,7 +2549,7 @@ perft 5 10755190
 perft 6 220058991
 
 id 283
-epd nbrkn1bq/p1pppr1p/1p6/5pp1/8/1N2PP2/PPPP2PP/1BKRNRBQ w c - 1 9
+epd nbrkn1bq/p1pppr1p/1p6/5pp1/8/1N2PP2/PPPP2PP/1BKRNRBQ w c -
 perft 1 19
 perft 2 491
 perft 3 10090
@@ -2558,7 +2558,7 @@ perft 5 6230616
 perft 6 180748649
 
 id 284
-epd nrkbnrbq/ppppppp1/8/8/7p/PP3P2/2PPPRPP/NRKBN1BQ w Bfb - 0 9
+epd nrkbnrbq/ppppppp1/8/8/7p/PP3P2/2PPPRPP/NRKBN1BQ w Bfb -
 perft 1 16
 perft 2 353
 perft 3 6189
@@ -2567,7 +2567,7 @@ perft 5 3008668
 perft 6 82706705
 
 id 285
-epd nrknrbbq/p4ppp/2p1p3/1p1p4/1P2P3/2P5/P1NP1PPP/1RKNRBBQ w EBeb - 0 9
+epd nrknrbbq/p4ppp/2p1p3/1p1p4/1P2P3/2P5/P1NP1PPP/1RKNRBBQ w EBeb -
 perft 1 29
 perft 2 728
 perft 3 21915
@@ -2576,7 +2576,7 @@ perft 5 18231199
 perft 6 511686397
 
 id 286
-epd nrknr1bb/pppp1p2/7p/2qPp1p1/8/1P5P/P1P1PPP1/NRKNRQBB w EBeb - 0 9
+epd nrknr1bb/pppp1p2/7p/2qPp1p1/8/1P5P/P1P1PPP1/NRKNRQBB w EBeb -
 perft 1 20
 perft 2 714
 perft 3 14336
@@ -2585,7 +2585,7 @@ perft 5 11132758
 perft 6 386064577
 
 id 287
-epd bbqnrrkn/ppp2p1p/3pp1p1/8/1PP5/2Q5/P1BPPPPP/B2NRKRN w GE - 0 9
+epd bbqnrrkn/ppp2p1p/3pp1p1/8/1PP5/2Q5/P1BPPPPP/B2NRKRN w GE -
 perft 1 39
 perft 2 593
 perft 3 23446
@@ -2594,7 +2594,7 @@ perft 5 16764576
 perft 6 346185058
 
 id 288
-epd bqn1rkrn/p1p2ppp/1p1p4/4p3/3PP2b/8/PPP2PPP/BQNBRKRN w GEge - 2 9
+epd bqn1rkrn/p1p2ppp/1p1p4/4p3/3PP2b/8/PPP2PPP/BQNBRKRN w GEge -
 perft 1 25
 perft 2 773
 perft 3 20042
@@ -2603,7 +2603,7 @@ perft 5 16632403
 perft 6 515838333
 
 id 289
-epd bqnrkb1n/p1p1pprp/3p4/1p2P1p1/2PP4/8/PP3PPP/BQNRKBRN w GDd - 1 9
+epd bqnrkb1n/p1p1pprp/3p4/1p2P1p1/2PP4/8/PP3PPP/BQNRKBRN w GDd -
 perft 1 31
 perft 2 860
 perft 3 28102
@@ -2612,7 +2612,7 @@ perft 5 27233018
 perft 6 813751250
 
 id 290
-epd bqr1krnb/ppppppp1/7p/3n4/1P4P1/P4N2/2PPPP1P/BQNRKR1B w FDf - 3 9
+epd bqr1krnb/ppppppp1/7p/3n4/1P4P1/P4N2/2PPPP1P/BQNRKR1B w FDf -
 perft 1 31
 perft 2 709
 perft 3 22936
@@ -2621,7 +2621,7 @@ perft 5 18608857
 perft 6 480498340
 
 id 291
-epd qbbn1krn/pp3ppp/4r3/2ppp3/P1P4P/8/1P1PPPP1/QBBNRKRN w GEg - 1 9
+epd qbbn1krn/pp3ppp/4r3/2ppp3/P1P4P/8/1P1PPPP1/QBBNRKRN w GEg -
 perft 1 26
 perft 2 775
 perft 3 21100
@@ -2630,7 +2630,7 @@ perft 5 18476807
 perft 6 582542257
 
 id 292
-epd qnbbrkrn/1p1pp2p/p7/2p2pp1/8/4P2P/PPPP1PPK/QNBBRR1N w ge - 0 9
+epd qnbbrkrn/1p1pp2p/p7/2p2pp1/8/4P2P/PPPP1PPK/QNBBRR1N w ge -
 perft 1 25
 perft 2 599
 perft 3 15139
@@ -2639,7 +2639,7 @@ perft 5 10260500
 perft 6 279222412
 
 id 293
-epd qnbrkbrn/1ppp2p1/p3p2p/5p2/P4P2/1P6/2PPP1PP/QNBRKBRN w GDgd - 0 9
+epd qnbrkbrn/1ppp2p1/p3p2p/5p2/P4P2/1P6/2PPP1PP/QNBRKBRN w GDgd -
 perft 1 27
 perft 2 588
 perft 3 16735
@@ -2648,7 +2648,7 @@ perft 5 11640416
 perft 6 293541380
 
 id 294
-epd 1nbrkrnb/p1pppp1p/1pq3p1/8/4P3/P1P4N/1P1P1PPP/QNBRKR1B w FDfd - 1 9
+epd 1nbrkrnb/p1pppp1p/1pq3p1/8/4P3/P1P4N/1P1P1PPP/QNBRKR1B w FDfd -
 perft 1 18
 perft 2 609
 perft 3 11789
@@ -2657,7 +2657,7 @@ perft 5 8604788
 perft 6 299491047
 
 id 295
-epd qb1r1krn/pppp2pp/1n2ppb1/4P3/7P/8/PPPP1PP1/QBNRBKRN w GDgd - 0 9
+epd qb1r1krn/pppp2pp/1n2ppb1/4P3/7P/8/PPPP1PP1/QBNRBKRN w GDgd -
 perft 1 20
 perft 2 578
 perft 3 12205
@@ -2666,7 +2666,7 @@ perft 5 7939483
 perft 6 229142178
 
 id 296
-epd qnr1bkrn/p3pppp/1bpp4/1p6/2P2PP1/8/PP1PPN1P/QNRBBKR1 w GCgc - 0 9
+epd qnr1bkrn/p3pppp/1bpp4/1p6/2P2PP1/8/PP1PPN1P/QNRBBKR1 w GCgc -
 perft 1 30
 perft 2 865
 perft 3 26617
@@ -2675,7 +2675,7 @@ perft 5 24475596
 perft 6 719842237
 
 id 297
-epd 1nkrbbrn/qppppppp/8/8/p2P4/1P5P/P1P1PPP1/QNKRBBRN w - - 0 9
+epd 1nkrbbrn/qppppppp/8/8/p2P4/1P5P/P1P1PPP1/QNKRBBRN w - -
 perft 1 27
 perft 2 672
 perft 3 18371
@@ -2684,7 +2684,7 @@ perft 5 14065717
 perft 6 410130412
 
 id 298
-epd 1qrkbrnb/ppp1p1pp/n2p4/5p2/4N3/8/PPPPPPPP/Q1RKBRNB w Ffc - 2 9
+epd 1qrkbrnb/ppp1p1pp/n2p4/5p2/4N3/8/PPPPPPPP/Q1RKBRNB w Ffc -
 perft 1 25
 perft 2 718
 perft 3 18573
@@ -2693,7 +2693,7 @@ perft 5 14404324
 perft 6 424279467
 
 id 299
-epd q1nrkrbn/pp1pppp1/2p4p/8/P7/5Pb1/BPPPPNPP/Q1NRKRB1 w FDfd - 0 9
+epd q1nrkrbn/pp1pppp1/2p4p/8/P7/5Pb1/BPPPPNPP/Q1NRKRB1 w FDfd -
 perft 1 22
 perft 2 558
 perft 3 12911
@@ -2702,7 +2702,7 @@ perft 5 8516966
 perft 6 228074630
 
 id 300
-epd qnrbkrbn/1p1p1pp1/p1p5/4p2p/8/3P1P2/PPP1P1PP/QNRBKRBN w FCfc - 0 9
+epd qnrbkrbn/1p1p1pp1/p1p5/4p2p/8/3P1P2/PPP1P1PP/QNRBKRBN w FCfc -
 perft 1 28
 perft 2 669
 perft 3 17713
@@ -2711,7 +2711,7 @@ perft 5 12055174
 perft 6 313276304
 
 id 301
-epd qnrkr1bn/p1pp1ppp/8/1p2p3/3P1P2/bP4P1/P1P1P2P/QNRKRBBN w ECec - 1 9
+epd qnrkr1bn/p1pp1ppp/8/1p2p3/3P1P2/bP4P1/P1P1P2P/QNRKRBBN w ECec -
 perft 1 23
 perft 2 845
 perft 3 20973
@@ -2720,7 +2720,7 @@ perft 5 19939053
 perft 6 718075943
 
 id 302
-epd q1krrnbb/p1p1pppp/2np4/1pB5/5P2/8/PPPPP1PP/QNRKRN1B w EC - 0 9
+epd q1krrnbb/p1p1pppp/2np4/1pB5/5P2/8/PPPPP1PP/QNRKRN1B w EC -
 perft 1 29
 perft 2 776
 perft 3 21966
@@ -2729,7 +2729,7 @@ perft 5 18110831
 perft 6 549019739
 
 id 303
-epd bbn1rkrn/pp1p1ppp/8/2p1p1q1/6P1/P7/BPPPPP1P/B1NQRKRN w GEge - 0 9
+epd bbn1rkrn/pp1p1ppp/8/2p1p1q1/6P1/P7/BPPPPP1P/B1NQRKRN w GEge -
 perft 1 26
 perft 2 936
 perft 3 25177
@@ -2738,7 +2738,7 @@ perft 5 24984621
 perft 6 901444251
 
 id 304
-epd bn1brkrn/pp1qpp1p/2p3p1/3p4/1PPP4/P7/4PPPP/BNQBRKRN w GEge - 1 9
+epd bn1brkrn/pp1qpp1p/2p3p1/3p4/1PPP4/P7/4PPPP/BNQBRKRN w GEge -
 perft 1 29
 perft 2 755
 perft 3 22858
@@ -2747,7 +2747,7 @@ perft 5 20128587
 perft 6 600207069
 
 id 305
-epd b2rkbrn/p1pppppp/qp6/8/1n6/2B2P2/P1PPP1PP/1NQRKBRN w GDgd - 0 9
+epd b2rkbrn/p1pppppp/qp6/8/1n6/2B2P2/P1PPP1PP/1NQRKBRN w GDgd -
 perft 1 24
 perft 2 878
 perft 3 21440
@@ -2756,7 +2756,7 @@ perft 5 20840078
 perft 6 775795187
 
 id 306
-epd b2rkrnb/pqp1pppp/n7/1p1p4/P7/N1P2N2/1P1PPPPP/B1QRKR1B w FDfd - 4 9
+epd b2rkrnb/pqp1pppp/n7/1p1p4/P7/N1P2N2/1P1PPPPP/B1QRKR1B w FDfd -
 perft 1 26
 perft 2 724
 perft 3 19558
@@ -2765,7 +2765,7 @@ perft 5 16109522
 perft 6 492933398
 
 id 307
-epd 1bbqrkrn/ppppp1p1/8/5p1p/P1n3P1/3P4/1PP1PP1P/NBBQRRKN w ge - 1 9
+epd 1bbqrkrn/ppppp1p1/8/5p1p/P1n3P1/3P4/1PP1PP1P/NBBQRRKN w ge -
 perft 1 25
 perft 2 678
 perft 3 17351
@@ -2774,7 +2774,7 @@ perft 5 12173245
 perft 6 329661421
 
 id 308
-epd nqb1rrkn/ppp1bppp/3pp3/8/3P4/1P6/PQP1PPPP/N1BBRRKN w - - 1 9
+epd nqb1rrkn/ppp1bppp/3pp3/8/3P4/1P6/PQP1PPPP/N1BBRRKN w - -
 perft 1 23
 perft 2 503
 perft 3 12465
@@ -2783,7 +2783,7 @@ perft 5 7626054
 perft 6 188215608
 
 id 309
-epd nqbrkbr1/p1pppppp/1p6/2N2n2/2P5/5P2/PP1PP1PP/1QBRKBRN w GDgd - 1 9
+epd nqbrkbr1/p1pppppp/1p6/2N2n2/2P5/5P2/PP1PP1PP/1QBRKBRN w GDgd -
 perft 1 29
 perft 2 688
 perft 3 20289
@@ -2792,7 +2792,7 @@ perft 5 15167248
 perft 6 399015237
 
 id 310
-epd nqbrkrn1/1ppppp2/6pp/p7/1P6/2Q5/P1PPPPPP/N1BRKRNB w FDfd - 0 9
+epd nqbrkrn1/1ppppp2/6pp/p7/1P6/2Q5/P1PPPPPP/N1BRKRNB w FDfd -
 perft 1 36
 perft 2 602
 perft 3 20985
@@ -2801,7 +2801,7 @@ perft 5 13706856
 perft 6 291708797
 
 id 311
-epd nbqrbrkn/pp1p1pp1/2p5/4p2p/2P3P1/1P3P2/P2PP2P/NBQRBKRN w GD - 0 9
+epd nbqrbrkn/pp1p1pp1/2p5/4p2p/2P3P1/1P3P2/P2PP2P/NBQRBKRN w GD -
 perft 1 34
 perft 2 655
 perft 3 22581
@@ -2810,7 +2810,7 @@ perft 5 16613630
 perft 6 379344541
 
 id 312
-epd nqrbbrkn/1p1pppp1/8/p1p4p/4P2P/1N4P1/PPPP1P2/1QRBBKRN w GC - 0 9
+epd nqrbbrkn/1p1pppp1/8/p1p4p/4P2P/1N4P1/PPPP1P2/1QRBBKRN w GC -
 perft 1 23
 perft 2 597
 perft 3 14468
@@ -2819,7 +2819,7 @@ perft 5 10096863
 perft 6 294900903
 
 id 313
-epd nqrkbbrn/2p1p1pp/pp1p1p2/8/P2N4/2P5/1P1PPPPP/1QRKBBRN w GCgc - 0 9
+epd nqrkbbrn/2p1p1pp/pp1p1p2/8/P2N4/2P5/1P1PPPPP/1QRKBBRN w GCgc -
 perft 1 32
 perft 2 744
 perft 3 23310
@@ -2828,7 +2828,7 @@ perft 5 17597164
 perft 6 428786656
 
 id 314
-epd n1krbrnb/q1pppppp/p7/1p6/3Q4/2P2P2/PP1PP1PP/N1RKBRNB w FC - 1 9
+epd n1krbrnb/q1pppppp/p7/1p6/3Q4/2P2P2/PP1PP1PP/N1RKBRNB w FC -
 perft 1 43
 perft 2 1038
 perft 3 41327
@@ -2837,7 +2837,7 @@ perft 5 40918952
 perft 6 1126603824
 
 id 315
-epd nb1rkrbn/p1pp1p1p/qp6/4p1p1/5PP1/P7/1PPPPB1P/NBQRKR1N w FDfd - 2 9
+epd nb1rkrbn/p1pp1p1p/qp6/4p1p1/5PP1/P7/1PPPPB1P/NBQRKR1N w FDfd -
 perft 1 26
 perft 2 645
 perft 3 16463
@@ -2846,7 +2846,7 @@ perft 5 11911314
 perft 6 342563372
 
 id 316
-epd nqr1krbn/pppp1ppp/8/8/3pP3/5P2/PPPb1NPP/NQRBKRB1 w FCfc - 3 9
+epd nqr1krbn/pppp1ppp/8/8/3pP3/5P2/PPPb1NPP/NQRBKRB1 w FCfc -
 perft 1 2
 perft 2 51
 perft 3 1047
@@ -2855,7 +2855,7 @@ perft 5 612305
 perft 6 17040200
 
 id 317
-epd n1rkrbbn/pqppppp1/7p/1p6/8/1NPP4/PP1KPPPP/1QR1RBBN w ec - 0 9
+epd n1rkrbbn/pqppppp1/7p/1p6/8/1NPP4/PP1KPPPP/1QR1RBBN w ec -
 perft 1 25
 perft 2 674
 perft 3 17553
@@ -2864,7 +2864,7 @@ perft 5 13421727
 perft 6 403551903
 
 id 318
-epd 1qrkrnbb/1p1p1ppp/pnp1p3/8/3PP3/P6P/1PP2PP1/NQRKRNBB w ECec - 0 9
+epd 1qrkrnbb/1p1p1ppp/pnp1p3/8/3PP3/P6P/1PP2PP1/NQRKRNBB w ECec -
 perft 1 24
 perft 2 688
 perft 3 17342
@@ -2873,7 +2873,7 @@ perft 5 13322502
 perft 6 403441498
 
 id 319
-epd 1bnrqkrn/2ppppp1/p7/1p1b3p/3PP1P1/8/PPPQ1P1P/BBNR1KRN w GDgd - 1 9
+epd 1bnrqkrn/2ppppp1/p7/1p1b3p/3PP1P1/8/PPPQ1P1P/BBNR1KRN w GDgd -
 perft 1 35
 perft 2 925
 perft 3 32238
@@ -2882,7 +2882,7 @@ perft 5 30458921
 perft 6 824344087
 
 id 320
-epd bnrbqkr1/ppp2pp1/6n1/3pp2p/1P6/2N3N1/P1PPPPPP/B1RBQRK1 w gc - 0 9
+epd bnrbqkr1/ppp2pp1/6n1/3pp2p/1P6/2N3N1/P1PPPPPP/B1RBQRK1 w gc -
 perft 1 23
 perft 2 704
 perft 3 17345
@@ -2891,7 +2891,7 @@ perft 5 14154852
 perft 6 450893738
 
 id 321
-epd 1nrqkbrn/p1pppppp/8/1p1b4/P6P/5P2/1PPPP1P1/BNRQKBRN w GCgc - 1 9
+epd 1nrqkbrn/p1pppppp/8/1p1b4/P6P/5P2/1PPPP1P1/BNRQKBRN w GCgc -
 perft 1 19
 perft 2 505
 perft 3 10619
@@ -2900,7 +2900,7 @@ perft 5 6450025
 perft 6 175593967
 
 id 322
-epd b1rqkrnb/ppppppp1/8/6p1/3n4/NP6/P1PPPP1P/B1RQKRNB w FCfc - 0 9
+epd b1rqkrnb/ppppppp1/8/6p1/3n4/NP6/P1PPPP1P/B1RQKRNB w FCfc -
 perft 1 25
 perft 2 614
 perft 3 15578
@@ -2909,7 +2909,7 @@ perft 5 10391021
 perft 6 259629603
 
 id 323
-epd nbbrqkrn/ppp3p1/3pp3/5p1p/1P2P3/P7/2PPQPPP/NBBR1KRN w GDgd - 0 9
+epd nbbrqkrn/ppp3p1/3pp3/5p1p/1P2P3/P7/2PPQPPP/NBBR1KRN w GDgd -
 perft 1 30
 perft 2 833
 perft 3 25719
@@ -2918,7 +2918,7 @@ perft 5 22873901
 perft 6 649556666
 
 id 324
-epd nr1bqrk1/ppp1pppp/6n1/3pP3/8/5PQb/PPPP2PP/NRBB1KRN w GB - 3 9
+epd nr1bqrk1/ppp1pppp/6n1/3pP3/8/5PQb/PPPP2PP/NRBB1KRN w GB -
 perft 1 26
 perft 2 734
 perft 3 20161
@@ -2927,7 +2927,7 @@ perft 5 17199594
 perft 6 512134836
 
 id 325
-epd 1rbqkbr1/ppppp1pp/1n6/4np2/3P1P2/6P1/PPPQP2P/NRB1KBRN w GBgb - 1 9
+epd 1rbqkbr1/ppppp1pp/1n6/4np2/3P1P2/6P1/PPPQP2P/NRB1KBRN w GBgb -
 perft 1 27
 perft 2 662
 perft 3 17897
@@ -2936,7 +2936,7 @@ perft 5 13038519
 perft 6 338365642
 
 id 326
-epd nr1qkr1b/ppp1pp1p/4bn2/3p2p1/4P3/1Q6/PPPP1PPP/NRB1KRNB w FBfb - 4 9
+epd nr1qkr1b/ppp1pp1p/4bn2/3p2p1/4P3/1Q6/PPPP1PPP/NRB1KRNB w FBfb -
 perft 1 33
 perft 2 939
 perft 3 30923
@@ -2945,7 +2945,7 @@ perft 5 30995969
 perft 6 991509814
 
 id 327
-epd nb1qbkrn/pprp1pp1/7p/2p1pB2/Q1PP4/8/PP2PPPP/N1R1BKRN w GCg - 2 9
+epd nb1qbkrn/pprp1pp1/7p/2p1pB2/Q1PP4/8/PP2PPPP/N1R1BKRN w GCg -
 perft 1 47
 perft 2 1128
 perft 3 50723
@@ -2954,7 +2954,7 @@ perft 5 56747878
 perft 6 1560584212
 
 id 328
-epd nrqb1rkn/pp2pppp/2bp4/2p5/6P1/2P3N1/PP1PPP1P/NRQBBRK1 w - - 3 9
+epd nrqb1rkn/pp2pppp/2bp4/2p5/6P1/2P3N1/PP1PPP1P/NRQBBRK1 w - -
 perft 1 24
 perft 2 828
 perft 3 21148
@@ -2963,7 +2963,7 @@ perft 5 19506135
 perft 6 668969549
 
 id 329
-epd nrq1bbrn/ppkpp2p/2p3p1/P4p2/8/4P1N1/1PPP1PPP/NRQKBBR1 w GB - 0 9
+epd nrq1bbrn/ppkpp2p/2p3p1/P4p2/8/4P1N1/1PPP1PPP/NRQKBBR1 w GB -
 perft 1 25
 perft 2 525
 perft 3 13533
@@ -2972,7 +2972,7 @@ perft 5 8250997
 perft 6 201795680
 
 id 330
-epd Br1kbrn1/pqpppp2/8/6pp/3b2P1/1N6/PPPPPP1P/1RQKBRN1 w FBfb - 3 9
+epd Br1kbrn1/pqpppp2/8/6pp/3b2P1/1N6/PPPPPP1P/1RQKBRN1 w FBfb -
 perft 1 20
 perft 2 790
 perft 3 18175
@@ -2981,7 +2981,7 @@ perft 5 17735648
 perft 6 669854148
 
 id 331
-epd nbrqkrbn/2p1p1pp/p7/1p1p1p2/4P1P1/5P2/PPPP3P/NBRQKRBN w FCfc - 0 9
+epd nbrqkrbn/2p1p1pp/p7/1p1p1p2/4P1P1/5P2/PPPP3P/NBRQKRBN w FCfc -
 perft 1 29
 perft 2 771
 perft 3 22489
@@ -2990,7 +2990,7 @@ perft 5 19192982
 perft 6 591335970
 
 id 332
-epd 1rqbkrbn/1ppppp1p/1n6/p1N3p1/8/2P4P/PP1PPPP1/1RQBKRBN w FBfb - 0 9
+epd 1rqbkrbn/1ppppp1p/1n6/p1N3p1/8/2P4P/PP1PPPP1/1RQBKRBN w FBfb -
 perft 1 29
 perft 2 502
 perft 3 14569
@@ -2999,7 +2999,7 @@ perft 5 8652810
 perft 6 191762235
 
 id 333
-epd 1rqkrbbn/ppnpp1pp/8/2p5/6p1/3P4/PPP1PPPP/NRK1RBBN w eb - 0 9
+epd 1rqkrbbn/ppnpp1pp/8/2p5/6p1/3P4/PPP1PPPP/NRK1RBBN w eb -
 perft 1 19
 perft 2 531
 perft 3 10812
@@ -3008,7 +3008,7 @@ perft 5 6506674
 perft 6 184309316
 
 id 334
-epd nrqkrnbb/p1pp2pp/5p2/4P3/2p5/4N3/PP1PP1PP/NRQKR1BB w EBeb - 0 9
+epd nrqkrnbb/p1pp2pp/5p2/4P3/2p5/4N3/PP1PP1PP/NRQKR1BB w EBeb -
 perft 1 26
 perft 2 800
 perft 3 23256
@@ -3017,7 +3017,7 @@ perft 5 23952941
 perft 6 809841274
 
 id 335
-epd bbnrkqrn/pp3pp1/4p2p/2pp4/4P1P1/1PB5/P1PP1P1P/1BNRKQRN w GDgd - 0 9
+epd bbnrkqrn/pp3pp1/4p2p/2pp4/4P1P1/1PB5/P1PP1P1P/1BNRKQRN w GDgd -
 perft 1 33
 perft 2 915
 perft 3 30536
@@ -3026,7 +3026,7 @@ perft 5 29602610
 perft 6 881898159
 
 id 336
-epd bnrbkqr1/1p2pppp/6n1/p1pp4/7P/P3P3/1PPPKPP1/BNRB1QRN w gc - 0 9
+epd bnrbkqr1/1p2pppp/6n1/p1pp4/7P/P3P3/1PPPKPP1/BNRB1QRN w gc -
 perft 1 19
 perft 2 457
 perft 3 9332
@@ -3035,7 +3035,7 @@ perft 5 5356253
 perft 6 144653627
 
 id 337
-epd b1rkqbrn/pp1p2pp/2n1p3/2p2p2/3P2PP/8/PPP1PP2/BNKRQBRN w gc - 0 9
+epd b1rkqbrn/pp1p2pp/2n1p3/2p2p2/3P2PP/8/PPP1PP2/BNKRQBRN w gc -
 perft 1 30
 perft 2 985
 perft 3 30831
@@ -3044,7 +3044,7 @@ perft 5 32684185
 perft 6 1080607773
 
 id 338
-epd b1rkqrnb/2ppppp1/np6/p6p/1P6/P2P3P/2P1PPP1/BNRKQRNB w FCfc - 0 9
+epd b1rkqrnb/2ppppp1/np6/p6p/1P6/P2P3P/2P1PPP1/BNRKQRNB w FCfc -
 perft 1 26
 perft 2 692
 perft 3 18732
@@ -3053,7 +3053,7 @@ perft 5 14561181
 perft 6 413226841
 
 id 339
-epd nbbrkqrn/1ppp1p2/p6p/4p1p1/5P2/1P5P/P1PPPNP1/NBBRKQR1 w GDgd - 0 9
+epd nbbrkqrn/1ppp1p2/p6p/4p1p1/5P2/1P5P/P1PPPNP1/NBBRKQR1 w GDgd -
 perft 1 22
 perft 2 561
 perft 3 13222
@@ -3062,7 +3062,7 @@ perft 5 9307003
 perft 6 273928315
 
 id 340
-epd nrbbkqrn/p1pppppp/8/1p6/4P3/7Q/PPPP1PPP/NRBBK1RN w GBgb - 0 9
+epd nrbbkqrn/p1pppppp/8/1p6/4P3/7Q/PPPP1PPP/NRBBK1RN w GBgb -
 perft 1 38
 perft 2 769
 perft 3 28418
@@ -3071,7 +3071,7 @@ perft 5 23091070
 perft 6 560139600
 
 id 341
-epd nrbkqbrn/1pppp2p/8/p4pp1/P4PQ1/8/1PPPP1PP/NRBK1BRN w GBgb - 0 9
+epd nrbkqbrn/1pppp2p/8/p4pp1/P4PQ1/8/1PPPP1PP/NRBK1BRN w GBgb -
 perft 1 23
 perft 2 507
 perft 3 13067
@@ -3080,7 +3080,7 @@ perft 5 8887567
 perft 6 237475184
 
 id 342
-epd nr1kqr1b/pp2pppp/5n2/2pp4/P5b1/5P2/1PPPPRPP/NRBK1QNB w Bfb - 2 9
+epd nr1kqr1b/pp2pppp/5n2/2pp4/P5b1/5P2/1PPPPRPP/NRBK1QNB w Bfb -
 perft 1 18
 perft 2 626
 perft 3 12386
@@ -3089,7 +3089,7 @@ perft 5 9465555
 perft 6 335004239
 
 id 343
-epd nbkrbqrn/1pppppp1/8/4P2p/pP6/P7/2PP1PPP/NBRKBQRN w GC - 0 9
+epd nbkrbqrn/1pppppp1/8/4P2p/pP6/P7/2PP1PPP/NBRKBQRN w GC -
 perft 1 22
 perft 2 329
 perft 3 8475
@@ -3098,7 +3098,7 @@ perft 5 4160034
 perft 6 82875306
 
 id 344
-epd nrkb1qrn/pp1pp1pp/8/5p1b/P1p4P/6N1/1PPPPPP1/NRKBBQR1 w GBgb - 2 9
+epd nrkb1qrn/pp1pp1pp/8/5p1b/P1p4P/6N1/1PPPPPP1/NRKBBQR1 w GBgb -
 perft 1 16
 perft 2 479
 perft 3 9037
@@ -3107,7 +3107,7 @@ perft 5 5862341
 perft 6 184959796
 
 id 345
-epd 1rkq1brn/ppppp1pp/1n6/3b1p2/3N3P/5P2/PPPPP1P1/1RKQBBRN w GBgb - 3 9
+epd 1rkq1brn/ppppp1pp/1n6/3b1p2/3N3P/5P2/PPPPP1P1/1RKQBBRN w GBgb -
 perft 1 23
 perft 2 614
 perft 3 15324
@@ -3116,7 +3116,7 @@ perft 5 11090645
 perft 6 313526088
 
 id 346
-epd nrk1brnb/pp1ppppp/2p5/3q4/5P2/PP6/1KPPP1PP/NR1QBRNB w fb - 1 9
+epd nrk1brnb/pp1ppppp/2p5/3q4/5P2/PP6/1KPPP1PP/NR1QBRNB w fb -
 perft 1 25
 perft 2 942
 perft 3 21765
@@ -3125,7 +3125,7 @@ perft 5 19318837
 perft 6 685549171
 
 id 347
-epd nbrkqr1n/1pppp2p/p4pp1/2Bb4/5P2/6P1/PPPPP2P/NBRKQ1RN w Cfc - 2 9
+epd nbrkqr1n/1pppp2p/p4pp1/2Bb4/5P2/6P1/PPPPP2P/NBRKQ1RN w Cfc -
 perft 1 30
 perft 2 841
 perft 3 24775
@@ -3134,7 +3134,7 @@ perft 5 20145765
 perft 6 557578726
 
 id 348
-epd n1kbqrbn/2p1pppp/1r6/pp1p4/P7/3P4/1PP1PPPP/NRKBQRBN w FBf - 2 9
+epd n1kbqrbn/2p1pppp/1r6/pp1p4/P7/3P4/1PP1PPPP/NRKBQRBN w FBf -
 perft 1 21
 perft 2 591
 perft 3 14101
@@ -3143,7 +3143,7 @@ perft 5 10295086
 perft 6 292131422
 
 id 349
-epd nrkqrbb1/ppp1pppp/3p4/8/4P3/2Pn1P2/PP4PP/NRKQRBBN w EBeb - 0 9
+epd nrkqrbb1/ppp1pppp/3p4/8/4P3/2Pn1P2/PP4PP/NRKQRBBN w EBeb -
 perft 1 4
 perft 2 88
 perft 3 3090
@@ -3152,7 +3152,7 @@ perft 5 2640555
 perft 6 66958031
 
 id 350
-epd nrkqrnbb/ppppp1p1/7p/1P3p2/3P4/2P5/P3PPPP/NRKQRNBB w EBeb - 0 9
+epd nrkqrnbb/ppppp1p1/7p/1P3p2/3P4/2P5/P3PPPP/NRKQRNBB w EBeb -
 perft 1 29
 perft 2 689
 perft 3 21091
@@ -3161,7 +3161,7 @@ perft 5 16226660
 perft 6 408570219
 
 id 351
-epd bbnr1rqn/pp2pkpp/2pp1p2/8/4P1P1/8/PPPP1P1P/BBNRKRQN w FD - 0 9
+epd bbnr1rqn/pp2pkpp/2pp1p2/8/4P1P1/8/PPPP1P1P/BBNRKRQN w FD -
 perft 1 21
 perft 2 463
 perft 3 11135
@@ -3170,7 +3170,7 @@ perft 5 6826249
 perft 6 165025370
 
 id 352
-epd bnrbk1qn/1pppprpp/8/p4p1P/6P1/3P4/PPP1PP2/BNRBKRQN w FCc - 0 9
+epd bnrbk1qn/1pppprpp/8/p4p1P/6P1/3P4/PPP1PP2/BNRBKRQN w FCc -
 perft 1 22
 perft 2 459
 perft 3 11447
@@ -3179,7 +3179,7 @@ perft 5 7371098
 perft 6 190583454
 
 id 353
-epd 1nrkrbqn/p1pp1ppp/4p3/1p6/1PP5/6PB/P2PPPbP/BNRKR1QN w ECec - 0 9
+epd 1nrkrbqn/p1pp1ppp/4p3/1p6/1PP5/6PB/P2PPPbP/BNRKR1QN w ECec -
 perft 1 30
 perft 2 931
 perft 3 29012
@@ -3188,7 +3188,7 @@ perft 5 28412902
 perft 6 869228014
 
 id 354
-epd b1rkr1nb/pppppqp1/n4B2/7p/8/1P4P1/P1PPPP1P/1NKRRQNB w ec - 1 9
+epd b1rkr1nb/pppppqp1/n4B2/7p/8/1P4P1/P1PPPP1P/1NKRRQNB w ec -
 perft 1 36
 perft 2 934
 perft 3 31790
@@ -3197,7 +3197,7 @@ perft 5 30392925
 perft 6 952871799
 
 id 355
-epd nbbrkrqn/p1ppp1p1/8/1p3p1p/2P3PP/8/PP1PPPQ1/NBBRKR1N w FDfd - 0 9
+epd nbbrkrqn/p1ppp1p1/8/1p3p1p/2P3PP/8/PP1PPPQ1/NBBRKR1N w FDfd -
 perft 1 34
 perft 2 938
 perft 3 31848
@@ -3206,7 +3206,7 @@ perft 5 31185844
 perft 6 944483246
 
 id 356
-epd 1rbbkrqn/ppp1pp2/1n1p2p1/7p/P3P1P1/3P4/1PP2P1P/NRBBKRQN w FBfb - 0 9
+epd 1rbbkrqn/ppp1pp2/1n1p2p1/7p/P3P1P1/3P4/1PP2P1P/NRBBKRQN w FBfb -
 perft 1 26
 perft 2 646
 perft 3 18083
@@ -3215,7 +3215,7 @@ perft 5 14006203
 perft 6 384101783
 
 id 357
-epd nrbkrbq1/Qpppp1pp/2n5/5p2/P4P2/6N1/1PPPP1PP/NRBKRB2 w EBeb - 1 9
+epd nrbkrbq1/Qpppp1pp/2n5/5p2/P4P2/6N1/1PPPP1PP/NRBKRB2 w EBeb -
 perft 1 27
 perft 2 619
 perft 3 16713
@@ -3224,7 +3224,7 @@ perft 5 11718463
 perft 6 313794027
 
 id 358
-epd 1rbkr1nb/pppp1qpp/1n6/4pp2/1PP1P3/8/PB1P1PPP/NR1KRQNB w EBeb - 1 9
+epd 1rbkr1nb/pppp1qpp/1n6/4pp2/1PP1P3/8/PB1P1PPP/NR1KRQNB w EBeb -
 perft 1 32
 perft 2 1029
 perft 3 32970
@@ -3233,7 +3233,7 @@ perft 5 35483796
 perft 6 1181835398
 
 id 359
-epd nbrk1rqn/p1ppp2p/1p6/5ppb/8/1N2P2P/PPPP1PP1/1BKRBRQN w fc - 0 9
+epd nbrk1rqn/p1ppp2p/1p6/5ppb/8/1N2P2P/PPPP1PP1/1BKRBRQN w fc -
 perft 1 18
 perft 2 594
 perft 3 12350
@@ -3242,7 +3242,7 @@ perft 5 9329122
 perft 6 315021712
 
 id 360
-epd nrkbbrqn/3pppp1/7p/ppp5/P7/1N5P/1PPPPPP1/1RKBBRQN w FBfb - 0 9
+epd nrkbbrqn/3pppp1/7p/ppp5/P7/1N5P/1PPPPPP1/1RKBBRQN w FBfb -
 perft 1 19
 perft 2 417
 perft 3 9026
@@ -3251,7 +3251,7 @@ perft 5 5236331
 perft 6 137024458
 
 id 361
-epd nrkr1bqn/ppp1pppp/3p4/1b6/7P/P7/1PPPPPP1/NRKRBBQN w DBdb - 1 9
+epd nrkr1bqn/ppp1pppp/3p4/1b6/7P/P7/1PPPPPP1/NRKRBBQN w DBdb -
 perft 1 17
 perft 2 457
 perft 3 9083
@@ -3260,7 +3260,7 @@ perft 5 5503579
 perft 6 150091997
 
 id 362
-epd nrkrbqnb/p4ppp/1p2p3/2pp4/6P1/2P2N2/PPNPPP1P/1RKRBQ1B w DBdb - 0 9
+epd nrkrbqnb/p4ppp/1p2p3/2pp4/6P1/2P2N2/PPNPPP1P/1RKRBQ1B w DBdb -
 perft 1 27
 perft 2 755
 perft 3 21012
@@ -3269,7 +3269,7 @@ perft 5 17883987
 perft 6 547233320
 
 id 363
-epd nbkrr1bn/ppB2ppp/4p3/2qp4/4P3/5P2/PPPP2PP/NBRKRQ1N w EC - 1 9
+epd nbkrr1bn/ppB2ppp/4p3/2qp4/4P3/5P2/PPPP2PP/NBRKRQ1N w EC -
 perft 1 37
 perft 2 1473
 perft 3 51939
@@ -3278,7 +3278,7 @@ perft 5 68070015
 perft 6 2490912491
 
 id 364
-epd n1kbrqbn/p1pp1pp1/4p2p/2B5/1r3P2/8/PPPPP1PP/NRKBRQ1N w EBe - 2 9
+epd n1kbrqbn/p1pp1pp1/4p2p/2B5/1r3P2/8/PPPPP1PP/NRKBRQ1N w EBe -
 perft 1 30
 perft 2 1029
 perft 3 30874
@@ -3287,7 +3287,7 @@ perft 5 32318550
 perft 6 1106487743
 
 id 365
-epd nrkrqbbn/2pppp1p/8/pp6/1P1P2p1/P5P1/2P1PP1P/NRKRQBBN w DBdb - 0 9
+epd nrkrqbbn/2pppp1p/8/pp6/1P1P2p1/P5P1/2P1PP1P/NRKRQBBN w DBdb -
 perft 1 22
 perft 2 421
 perft 3 10034
@@ -3296,7 +3296,7 @@ perft 5 5754555
 perft 6 141245633
 
 id 366
-epd nrkr1nbb/1ppp2pp/p3q3/4pp2/2P5/P3P3/1PKP1PPP/NR1RQNBB w db - 0 9
+epd nrkr1nbb/1ppp2pp/p3q3/4pp2/2P5/P3P3/1PKP1PPP/NR1RQNBB w db -
 perft 1 22
 perft 2 619
 perft 3 13953
@@ -3305,7 +3305,7 @@ perft 5 9905109
 perft 6 301403003
 
 id 367
-epd bbnrkrnq/1pp1p2p/6p1/p2p1p2/8/1P2P3/P1PP1PPP/BBNRKRNQ w FDfd - 0 9
+epd bbnrkrnq/1pp1p2p/6p1/p2p1p2/8/1P2P3/P1PP1PPP/BBNRKRNQ w FDfd -
 perft 1 27
 perft 2 805
 perft 3 21915
@@ -3314,7 +3314,7 @@ perft 5 19133881
 perft 6 620749189
 
 id 368
-epd bnrbkrn1/pp1ppp2/2p3pp/8/2Pq4/P4PP1/1P1PP2P/BNRBKRNQ w FCfc - 1 9
+epd bnrbkrn1/pp1ppp2/2p3pp/8/2Pq4/P4PP1/1P1PP2P/BNRBKRNQ w FCfc -
 perft 1 20
 perft 2 770
 perft 3 16593
@@ -3323,7 +3323,7 @@ perft 5 13581691
 perft 6 456736500
 
 id 369
-epd b1rkrbnq/1pp1pppp/2np4/p5N1/8/1P2P3/P1PP1PPP/BNRKRB1Q w ECec - 0 9
+epd b1rkrbnq/1pp1pppp/2np4/p5N1/8/1P2P3/P1PP1PPP/BNRKRB1Q w ECec -
 perft 1 37
 perft 2 740
 perft 3 27073
@@ -3332,7 +3332,7 @@ perft 5 21156664
 perft 6 485803600
 
 id 370
-epd b1krrnqb/pp1ppp1p/n1p3p1/2N5/6P1/8/PPPPPP1P/B1RKRNQB w EC - 0 9
+epd b1krrnqb/pp1ppp1p/n1p3p1/2N5/6P1/8/PPPPPP1P/B1RKRNQB w EC -
 perft 1 34
 perft 2 850
 perft 3 28494
@@ -3341,7 +3341,7 @@ perft 5 25360295
 perft 6 698159474
 
 id 371
-epd 1bbr1rnq/ppppkppp/8/3np3/4P3/3P4/PPP1KPPP/NBBRR1NQ w - - 1 9
+epd 1bbr1rnq/ppppkppp/8/3np3/4P3/3P4/PPP1KPPP/NBBRR1NQ w - -
 perft 1 27
 perft 2 704
 perft 3 18290
@@ -3350,7 +3350,7 @@ perft 5 12817011
 perft 6 341026662
 
 id 372
-epd nrbbk1nq/p1p1prpp/1p6/N2p1p2/P7/8/1PPPPPPP/R1BBKRNQ w Fb - 2 9
+epd nrbbk1nq/p1p1prpp/1p6/N2p1p2/P7/8/1PPPPPPP/R1BBKRNQ w Fb -
 perft 1 23
 perft 2 552
 perft 3 13710
@@ -3359,7 +3359,7 @@ perft 5 9236564
 perft 6 248469879
 
 id 373
-epd 1rbkrb1q/1pppp1pp/1n5n/p4p2/P3P3/1P6/2PPNPPP/NRBKRB1Q w EBeb - 1 9
+epd 1rbkrb1q/1pppp1pp/1n5n/p4p2/P3P3/1P6/2PPNPPP/NRBKRB1Q w EBeb -
 perft 1 22
 perft 2 415
 perft 3 10198
@@ -3368,7 +3368,7 @@ perft 5 5735644
 perft 6 135295774
 
 id 374
-epd nrbkr1qb/1pp1pppp/6n1/p2p4/2P1P3/1N4N1/PP1P1PPP/1RBKR1QB w EBeb - 0 9
+epd nrbkr1qb/1pp1pppp/6n1/p2p4/2P1P3/1N4N1/PP1P1PPP/1RBKR1QB w EBeb -
 perft 1 27
 perft 2 709
 perft 3 19126
@@ -3377,7 +3377,7 @@ perft 5 14192779
 perft 6 380516508
 
 id 375
-epd nbrkbrnq/p3p1pp/1pp2p2/3p4/1PP5/4P3/P1KP1PPP/NBR1BRNQ w fc - 0 9
+epd nbrkbrnq/p3p1pp/1pp2p2/3p4/1PP5/4P3/P1KP1PPP/NBR1BRNQ w fc -
 perft 1 24
 perft 2 715
 perft 3 18009
@@ -3386,7 +3386,7 @@ perft 5 14322279
 perft 6 427269976
 
 id 376
-epd nrk1brnq/pp1p1pp1/7p/b1p1p3/1P6/6P1/P1PPPPQP/NRKBBRN1 w FBfb - 2 9
+epd nrk1brnq/pp1p1pp1/7p/b1p1p3/1P6/6P1/P1PPPPQP/NRKBBRN1 w FBfb -
 perft 1 29
 perft 2 675
 perft 3 20352
@@ -3395,7 +3395,7 @@ perft 5 15316285
 perft 6 389051744
 
 id 377
-epd nrkr1bnq/1p2pppp/p2p4/1bp5/PP6/1R5N/2PPPPPP/N1KRBB1Q w Ddb - 2 9
+epd nrkr1bnq/1p2pppp/p2p4/1bp5/PP6/1R5N/2PPPPPP/N1KRBB1Q w Ddb -
 perft 1 27
 perft 2 744
 perft 3 20494
@@ -3404,7 +3404,7 @@ perft 5 16188945
 perft 6 458900901
 
 id 378
-epd nrk1b1qb/pppn1ppp/3rp3/3p4/2P3P1/3P4/PPN1PP1P/1RKRBNQB w DBb - 3 9
+epd nrk1b1qb/pppn1ppp/3rp3/3p4/2P3P1/3P4/PPN1PP1P/1RKRBNQB w DBb -
 perft 1 35
 perft 2 941
 perft 3 33203
@@ -3413,7 +3413,7 @@ perft 5 33150360
 perft 6 968024386
 
 id 379
-epd nb1rrnbq/ppkp1ppp/8/2p1p3/P7/1N2P3/1PPP1PPP/1BKRRNBQ w - - 1 9
+epd nb1rrnbq/ppkp1ppp/8/2p1p3/P7/1N2P3/1PPP1PPP/1BKRRNBQ w - -
 perft 1 19
 perft 2 451
 perft 3 9655
@@ -3422,7 +3422,7 @@ perft 5 5506897
 perft 6 139436165
 
 id 380
-epd nrkbrnbq/4pppp/1ppp4/p7/2P1P3/3P2N1/PP3PPP/NRKBR1BQ w EBeb - 0 9
+epd nrkbrnbq/4pppp/1ppp4/p7/2P1P3/3P2N1/PP3PPP/NRKBR1BQ w EBeb -
 perft 1 29
 perft 2 591
 perft 3 17132
@@ -3431,7 +3431,7 @@ perft 5 11245508
 perft 6 270967202
 
 id 381
-epd nrkrnbbq/3p1ppp/1p6/p1p1p3/3P2P1/P4Q2/1PP1PP1P/NRKRNBB1 w DBdb - 0 9
+epd nrkrnbbq/3p1ppp/1p6/p1p1p3/3P2P1/P4Q2/1PP1PP1P/NRKRNBB1 w DBdb -
 perft 1 38
 perft 2 792
 perft 3 28597
@@ -3440,7 +3440,7 @@ perft 5 22654797
 perft 6 540864616
 
 id 382
-epd nr1rnqbb/ppp1pp1p/3k2p1/3p4/1P5P/3P1N2/P1P1PPP1/NRKR1QBB w DB - 1 9
+epd nr1rnqbb/ppp1pp1p/3k2p1/3p4/1P5P/3P1N2/P1P1PPP1/NRKR1QBB w DB -
 perft 1 25
 perft 2 758
 perft 3 18547
@@ -3449,7 +3449,7 @@ perft 5 13890077
 perft 6 402109399
 
 id 383
-epd bbqrnnkr/1ppp1p1p/5p2/p5p1/P7/1P4P1/2PPPP1P/1BQRNNKR w HDhd - 0 9
+epd bbqrnnkr/1ppp1p1p/5p2/p5p1/P7/1P4P1/2PPPP1P/1BQRNNKR w HDhd -
 perft 1 20
 perft 2 322
 perft 3 7224
@@ -3458,7 +3458,7 @@ perft 5 3588435
 perft 6 82754650
 
 id 384
-epd bqrb2k1/pppppppr/5nnp/8/3P1P2/4P1N1/PPP3PP/BQRBN1KR w HCc - 1 9
+epd bqrb2k1/pppppppr/5nnp/8/3P1P2/4P1N1/PPP3PP/BQRBN1KR w HCc -
 perft 1 25
 perft 2 597
 perft 3 15872
@@ -3467,7 +3467,7 @@ perft 5 11162476
 perft 6 295682250
 
 id 385
-epd bqrnn1kr/1pppbppp/8/4p3/1p6/2P1N2P/P2PPPP1/BQR1NBKR w HChc - 1 9
+epd bqrnn1kr/1pppbppp/8/4p3/1p6/2P1N2P/P2PPPP1/BQR1NBKR w HChc -
 perft 1 34
 perft 2 921
 perft 3 31695
@@ -3476,7 +3476,7 @@ perft 5 30126510
 perft 6 850296236
 
 id 386
-epd bqr1nkr1/pppppp2/2n3p1/7p/1P1b1P2/8/PQP1P1PP/B1RNNKRB w GCgc - 0 9
+epd bqr1nkr1/pppppp2/2n3p1/7p/1P1b1P2/8/PQP1P1PP/B1RNNKRB w GCgc -
 perft 1 23
 perft 2 788
 perft 3 21539
@@ -3485,7 +3485,7 @@ perft 5 20849374
 perft 6 645694580
 
 id 387
-epd qbbrnn1r/1pppp1pk/p7/5p1p/P2P3P/3N4/1PP1PPP1/QBBR1NKR w HD - 0 9
+epd qbbrnn1r/1pppp1pk/p7/5p1p/P2P3P/3N4/1PP1PPP1/QBBR1NKR w HD -
 perft 1 34
 perft 2 713
 perft 3 24475
@@ -3494,7 +3494,7 @@ perft 5 19494094
 perft 6 482645160
 
 id 388
-epd qrbb2kr/p1pppppp/1p1n4/8/1P3n2/P7/Q1PPP1PP/1RBBNNKR w HBhb - 0 9
+epd qrbb2kr/p1pppppp/1p1n4/8/1P3n2/P7/Q1PPP1PP/1RBBNNKR w HBhb -
 perft 1 28
 perft 2 977
 perft 3 26955
@@ -3503,7 +3503,7 @@ perft 5 27802999
 perft 6 992109168
 
 id 389
-epd qrb2bkr/1pp1pppp/2np1n2/pN6/3P4/4B3/PPP1PPPP/QR2NBKR w HBhb - 0 9
+epd qrb2bkr/1pp1pppp/2np1n2/pN6/3P4/4B3/PPP1PPPP/QR2NBKR w HBhb -
 perft 1 27
 perft 2 730
 perft 3 20534
@@ -3512,7 +3512,7 @@ perft 5 17005916
 perft 6 507008968
 
 id 390
-epd qrbnnkrb/pp2pp1p/8/2pp2p1/7P/P1P5/QP1PPPP1/1RBNNKRB w GBgb - 0 9
+epd qrbnnkrb/pp2pp1p/8/2pp2p1/7P/P1P5/QP1PPPP1/1RBNNKRB w GBgb -
 perft 1 24
 perft 2 813
 perft 3 21142
@@ -3521,7 +3521,7 @@ perft 5 19615756
 perft 6 655850285
 
 id 391
-epd 1brnb1kr/p1pppppp/1p6/8/4q2n/1P2P1P1/PNPP1P1P/QBR1BNKR w HChc - 3 9
+epd 1brnb1kr/p1pppppp/1p6/8/4q2n/1P2P1P1/PNPP1P1P/QBR1BNKR w HChc -
 perft 1 17
 perft 2 734
 perft 3 13462
@@ -3530,7 +3530,7 @@ perft 5 11032633
 perft 6 416356876
 
 id 392
-epd 1rnbbnkr/1pp1pppp/1q1p4/p7/4P3/5PN1/PPPP1BPP/QRNB2KR w HBhb - 1 9
+epd 1rnbbnkr/1pp1pppp/1q1p4/p7/4P3/5PN1/PPPP1BPP/QRNB2KR w HBhb -
 perft 1 26
 perft 2 809
 perft 3 21764
@@ -3539,7 +3539,7 @@ perft 5 20292750
 perft 6 675408811
 
 id 393
-epd qrnnbb1Q/ppp1pk1p/3p2p1/5p2/PP6/5P2/2PPP1PP/1RNNBBKR w HB - 0 9
+epd qrnnbb1Q/ppp1pk1p/3p2p1/5p2/PP6/5P2/2PPP1PP/1RNNBBKR w HB -
 perft 1 37
 perft 2 751
 perft 3 27902
@@ -3548,7 +3548,7 @@ perft 5 22443036
 perft 6 515122176
 
 id 394
-epd qrnnbkrb/p3p1pp/3p1p2/1pp5/PP2P3/8/2PP1PPP/QRNNBRKB w gb - 0 9
+epd qrnnbkrb/p3p1pp/3p1p2/1pp5/PP2P3/8/2PP1PPP/QRNNBRKB w gb -
 perft 1 30
 perft 2 906
 perft 3 27955
@@ -3557,7 +3557,7 @@ perft 5 27658191
 perft 6 890966633
 
 id 395
-epd qbrnnkbr/1p2pp1p/p1p3p1/3p4/6P1/P1N4P/1PPPPP2/QBR1NKBR w HChc - 0 9
+epd qbrnnkbr/1p2pp1p/p1p3p1/3p4/6P1/P1N4P/1PPPPP2/QBR1NKBR w HChc -
 perft 1 26
 perft 2 701
 perft 3 18930
@@ -3566,7 +3566,7 @@ perft 5 14733245
 perft 6 416881799
 
 id 396
-epd qr1b1kbr/1p1ppppp/1n1n4/p1p5/4P3/5NPP/PPPP1P2/QRNB1KBR w HBhb - 1 9
+epd qr1b1kbr/1p1ppppp/1n1n4/p1p5/4P3/5NPP/PPPP1P2/QRNB1KBR w HBhb -
 perft 1 26
 perft 2 649
 perft 3 17235
@@ -3575,7 +3575,7 @@ perft 5 12367604
 perft 6 342165821
 
 id 397
-epd qrnnkb1r/1pppppp1/7p/p4b2/4P3/5P1P/PPPP2PR/QRNNKBB1 w Bhb - 1 9
+epd qrnnkb1r/1pppppp1/7p/p4b2/4P3/5P1P/PPPP2PR/QRNNKBB1 w Bhb -
 perft 1 34
 perft 2 941
 perft 3 31720
@@ -3584,7 +3584,7 @@ perft 5 30307554
 perft 6 888709821
 
 id 398
-epd qr1nkrbb/p2ppppp/1pp5/8/3Pn3/1NP3P1/PP2PP1P/QR1NKRBB w FBfb - 1 9
+epd qr1nkrbb/p2ppppp/1pp5/8/3Pn3/1NP3P1/PP2PP1P/QR1NKRBB w FBfb -
 perft 1 19
 perft 2 505
 perft 3 11107
@@ -3593,7 +3593,7 @@ perft 5 7046501
 perft 6 190414579
 
 id 399
-epd bbrqn1kr/1pppp1pp/4n3/5p2/p5P1/3P4/PPP1PPKP/BBRQNN1R w hc - 0 9
+epd bbrqn1kr/1pppp1pp/4n3/5p2/p5P1/3P4/PPP1PPKP/BBRQNN1R w hc -
 perft 1 24
 perft 2 573
 perft 3 12963
@@ -3602,7 +3602,7 @@ perft 5 8191054
 perft 6 227555387
 
 id 400
-epd brqb1nkr/pppppp1p/8/4N1pn/5P2/6P1/PPPPP2P/BRQB1NKR w HBhb - 0 9
+epd brqb1nkr/pppppp1p/8/4N1pn/5P2/6P1/PPPPP2P/BRQB1NKR w HBhb -
 perft 1 26
 perft 2 550
 perft 3 14338
@@ -3611,7 +3611,7 @@ perft 5 8903754
 perft 6 223437427
 
 id 401
-epd brqnn1kr/pp3ppp/2pbp3/3p4/8/2NPP3/PPP1BPPP/BRQ1N1KR w HBhb - 0 9
+epd brqnn1kr/pp3ppp/2pbp3/3p4/8/2NPP3/PPP1BPPP/BRQ1N1KR w HBhb -
 perft 1 27
 perft 2 780
 perft 3 20760
@@ -3620,7 +3620,7 @@ perft 5 16243731
 perft 6 463883447
 
 id 402
-epd brq1nkrb/ppp2ppp/8/n2pp2P/P7/4P3/1PPP1PP1/BRQNNKRB w GBgb - 1 9
+epd brq1nkrb/ppp2ppp/8/n2pp2P/P7/4P3/1PPP1PP1/BRQNNKRB w GBgb -
 perft 1 17
 perft 2 426
 perft 3 8295
@@ -3629,7 +3629,7 @@ perft 5 5048497
 perft 6 153986034
 
 id 403
-epd rbbqn1kr/pp2p1pp/6n1/2pp1p2/2P4P/P7/BP1PPPP1/R1BQNNKR w HAha - 0 9
+epd rbbqn1kr/pp2p1pp/6n1/2pp1p2/2P4P/P7/BP1PPPP1/R1BQNNKR w HAha -
 perft 1 27
 perft 2 916
 perft 3 25798
@@ -3638,7 +3638,7 @@ perft 5 26302461
 perft 6 924181432
 
 id 404
-epd 1qbbn1kr/1ppppppp/r3n3/8/p1P5/P7/1P1PPPPP/RQBBNNKR w HAh - 1 9
+epd 1qbbn1kr/1ppppppp/r3n3/8/p1P5/P7/1P1PPPPP/RQBBNNKR w HAh -
 perft 1 29
 perft 2 817
 perft 3 24530
@@ -3647,7 +3647,7 @@ perft 5 22147642
 perft 6 670707652
 
 id 405
-epd rqbnnbkr/ppp1ppp1/7p/3p4/PP6/7P/1NPPPPP1/RQB1NBKR w HAa - 1 9
+epd rqbnnbkr/ppp1ppp1/7p/3p4/PP6/7P/1NPPPPP1/RQB1NBKR w HAa -
 perft 1 23
 perft 2 572
 perft 3 14509
@@ -3656,7 +3656,7 @@ perft 5 10416981
 perft 6 288064942
 
 id 406
-epd r1bnnkrb/q1ppp1pp/p7/1p3pB1/2P1P3/3P4/PP3PPP/RQ1NNKRB w GAga - 2 9
+epd r1bnnkrb/q1ppp1pp/p7/1p3pB1/2P1P3/3P4/PP3PPP/RQ1NNKRB w GAga -
 perft 1 31
 perft 2 925
 perft 3 27776
@@ -3665,7 +3665,7 @@ perft 5 26316355
 perft 6 843078864
 
 id 407
-epd rbqnb1kr/ppppp1pp/5p2/5N2/7P/1n3P2/PPPPP1P1/RBQNB1KR w HAha - 1 9
+epd rbqnb1kr/ppppp1pp/5p2/5N2/7P/1n3P2/PPPPP1P1/RBQNB1KR w HAha -
 perft 1 32
 perft 2 864
 perft 3 27633
@@ -3674,7 +3674,7 @@ perft 5 24738875
 perft 6 707188107
 
 id 408
-epd rqnbbn1r/ppppppp1/6k1/8/6Pp/2PN4/PP1PPPKP/RQ1BBN1R w - - 0 9
+epd rqnbbn1r/ppppppp1/6k1/8/6Pp/2PN4/PP1PPPKP/RQ1BBN1R w - -
 perft 1 27
 perft 2 566
 perft 3 15367
@@ -3683,7 +3683,7 @@ perft 5 9714509
 perft 6 234622128
 
 id 409
-epd rqnnbbkr/p1p2pp1/1p1p3p/4p3/4NP2/6P1/PPPPP2P/RQN1BBKR w HAha - 0 9
+epd rqnnbbkr/p1p2pp1/1p1p3p/4p3/4NP2/6P1/PPPPP2P/RQN1BBKR w HAha -
 perft 1 27
 perft 2 631
 perft 3 17923
@@ -3692,7 +3692,7 @@ perft 5 13307890
 perft 6 356279813
 
 id 410
-epd 1qnnbrkb/rppp1ppp/p3p3/8/4P3/2PP1P2/PP4PP/RQNNBKRB w GA - 1 9
+epd 1qnnbrkb/rppp1ppp/p3p3/8/4P3/2PP1P2/PP4PP/RQNNBKRB w GA -
 perft 1 24
 perft 2 479
 perft 3 12135
@@ -3701,7 +3701,7 @@ perft 5 7204345
 perft 6 175460841
 
 id 411
-epd rbqnn1br/p1pppk1p/1p4p1/5p2/8/P1P2P2/1PBPP1PP/R1QNNKBR w HA - 0 9
+epd rbqnn1br/p1pppk1p/1p4p1/5p2/8/P1P2P2/1PBPP1PP/R1QNNKBR w HA -
 perft 1 31
 perft 2 756
 perft 3 23877
@@ -3710,7 +3710,7 @@ perft 5 20036784
 perft 6 554292502
 
 id 412
-epd rqnbnkbr/1ppppp2/p5p1/8/1P4p1/4PP2/P1PP3P/RQNBNKBR w HAha - 0 9
+epd rqnbnkbr/1ppppp2/p5p1/8/1P4p1/4PP2/P1PP3P/RQNBNKBR w HAha -
 perft 1 24
 perft 2 715
 perft 3 18536
@@ -3719,7 +3719,7 @@ perft 5 16013189
 perft 6 515078271
 
 id 413
-epd rq1nkbbr/1p2pppp/p2n4/2pp4/1P4P1/P2N4/2PPPP1P/RQ1NKBBR w HAha - 1 9
+epd rq1nkbbr/1p2pppp/p2n4/2pp4/1P4P1/P2N4/2PPPP1P/RQ1NKBBR w HAha -
 perft 1 27
 perft 2 694
 perft 3 19840
@@ -3728,7 +3728,7 @@ perft 5 16685687
 perft 6 494574415
 
 id 414
-epd r1nnkrbb/pp1pppp1/2p3q1/7p/8/1PPP3P/P3PPP1/RQNNKRBB w FAfa - 1 9
+epd r1nnkrbb/pp1pppp1/2p3q1/7p/8/1PPP3P/P3PPP1/RQNNKRBB w FAfa -
 perft 1 18
 perft 2 520
 perft 3 10808
@@ -3737,7 +3737,7 @@ perft 5 7508201
 perft 6 235103697
 
 id 415
-epd bbrnqk1r/pppp3p/6p1/4pp2/3P2P1/8/PPP1PP1P/BBRN1NKR w HC - 0 9
+epd bbrnqk1r/pppp3p/6p1/4pp2/3P2P1/8/PPP1PP1P/BBRN1NKR w HC -
 perft 1 22
 perft 2 566
 perft 3 12965
@@ -3746,7 +3746,7 @@ perft 5 8721079
 perft 6 259069471
 
 id 416
-epd brnb1nkr/pppqpp2/3p2pp/8/3PP3/1P6/PBP2PPP/1RNBQNKR w HBhb - 0 9
+epd brnb1nkr/pppqpp2/3p2pp/8/3PP3/1P6/PBP2PPP/1RNBQNKR w HBhb -
 perft 1 32
 perft 2 859
 perft 3 28517
@@ -3755,7 +3755,7 @@ perft 5 27734108
 perft 6 829785474
 
 id 417
-epd brnq1b1r/ppp1ppkp/3p1np1/8/8/5P1P/PPPPPKPR/BRNQNB2 w - - 0 9
+epd brnq1b1r/ppp1ppkp/3p1np1/8/8/5P1P/PPPPPKPR/BRNQNB2 w - -
 perft 1 21
 perft 2 511
 perft 3 10951
@@ -3764,7 +3764,7 @@ perft 5 6372681
 perft 6 167139732
 
 id 418
-epd brnq1rkb/1pppppp1/3n3p/p7/8/P4NP1/1PPPPPRP/BRNQ1K1B w B - 0 9
+epd brnq1rkb/1pppppp1/3n3p/p7/8/P4NP1/1PPPPPRP/BRNQ1K1B w B -
 perft 1 25
 perft 2 548
 perft 3 14049
@@ -3773,7 +3773,7 @@ perft 5 9015901
 perft 6 235249649
 
 id 419
-epd rbb1qnkr/p1ppp1pp/1p3p2/6n1/8/1PN1P2P/P1PP1PP1/RBB1QNKR w HAha - 0 9
+epd rbb1qnkr/p1ppp1pp/1p3p2/6n1/8/1PN1P2P/P1PP1PP1/RBB1QNKR w HAha -
 perft 1 25
 perft 2 673
 perft 3 16412
@@ -3782,7 +3782,7 @@ perft 5 12099119
 perft 6 361714466
 
 id 420
-epd rnbb1nkr/1ppp1ppp/4p3/p5q1/6P1/1PP5/PB1PPP1P/RN1BQNKR w HAha - 1 9
+epd rnbb1nkr/1ppp1ppp/4p3/p5q1/6P1/1PP5/PB1PPP1P/RN1BQNKR w HAha -
 perft 1 19
 perft 2 663
 perft 3 14149
@@ -3791,7 +3791,7 @@ perft 5 11491355
 perft 6 399135495
 
 id 421
-epd rnbqnbkr/1pp1p2p/3p1p2/p5p1/5PP1/2P5/PPNPP2P/RNBQ1BKR w HAha - 0 9
+epd rnbqnbkr/1pp1p2p/3p1p2/p5p1/5PP1/2P5/PPNPP2P/RNBQ1BKR w HAha -
 perft 1 24
 perft 2 647
 perft 3 16679
@@ -3800,7 +3800,7 @@ perft 5 12649636
 perft 6 361157611
 
 id 422
-epd rnb2krb/pppqppnp/8/3p2p1/1P4P1/7P/P1PPPPB1/RNBQNKR1 w GAga - 1 9
+epd rnb2krb/pppqppnp/8/3p2p1/1P4P1/7P/P1PPPPB1/RNBQNKR1 w GAga -
 perft 1 24
 perft 2 722
 perft 3 18749
@@ -3809,7 +3809,7 @@ perft 5 16609220
 perft 6 563558512
 
 id 423
-epd rbnqb1kr/pppn1pp1/3p3p/4p3/1P6/P7/R1PPPPPP/1BNQBNKR w Hha - 1 9
+epd rbnqb1kr/pppn1pp1/3p3p/4p3/1P6/P7/R1PPPPPP/1BNQBNKR w Hha -
 perft 1 20
 perft 2 538
 perft 3 12277
@@ -3818,7 +3818,7 @@ perft 5 8687621
 perft 6 255304141
 
 id 424
-epd rnqb1nkr/p1pbp1pp/8/1pPp1p2/P2P4/8/1P2PPPP/RNQBBNKR w HAha - 1 9
+epd rnqb1nkr/p1pbp1pp/8/1pPp1p2/P2P4/8/1P2PPPP/RNQBBNKR w HAha -
 perft 1 35
 perft 2 764
 perft 3 26952
@@ -3827,7 +3827,7 @@ perft 5 22592380
 perft 6 564255328
 
 id 425
-epd rnq1bbkr/1p1ppp1p/4n3/p1p3p1/P1PP4/8/RP2PPPP/1NQNBBKR w Hha - 0 9
+epd rnq1bbkr/1p1ppp1p/4n3/p1p3p1/P1PP4/8/RP2PPPP/1NQNBBKR w Hha -
 perft 1 29
 perft 2 709
 perft 3 21296
@@ -3836,7 +3836,7 @@ perft 5 17597398
 perft 6 506140370
 
 id 426
-epd 1nqnbkrb/1pppp2p/r7/p4pp1/3P4/8/PPPBPPPP/RNQNK1RB w g - 0 9
+epd 1nqnbkrb/1pppp2p/r7/p4pp1/3P4/8/PPPBPPPP/RNQNK1RB w g -
 perft 1 27
 perft 2 1028
 perft 3 28534
@@ -3845,7 +3845,7 @@ perft 5 30251988
 perft 6 1096869832
 
 id 427
-epd rbnqnkbr/p1pp1p1p/8/1p2p3/3P2pP/2P5/PP2PPP1/RBNQNKBR w HAha - 0 9
+epd rbnqnkbr/p1pp1p1p/8/1p2p3/3P2pP/2P5/PP2PPP1/RBNQNKBR w HAha -
 perft 1 32
 perft 2 832
 perft 3 27120
@@ -3854,7 +3854,7 @@ perft 5 24945574
 perft 6 724171581
 
 id 428
-epd rnq1nkbr/1p1p1ppp/2p1pb2/p7/7P/2P5/PPNPPPPB/RNQB1K1R w HAha - 2 9
+epd rnq1nkbr/1p1p1ppp/2p1pb2/p7/7P/2P5/PPNPPPPB/RNQB1K1R w HAha -
 perft 1 31
 perft 2 779
 perft 3 24010
@@ -3863,7 +3863,7 @@ perft 5 19919434
 perft 6 551494771
 
 id 429
-epd rnqnk1br/p1ppp1bp/1p3p2/6p1/4N3/P5P1/1PPPPP1P/R1QNKBBR w HAha - 2 9
+epd rnqnk1br/p1ppp1bp/1p3p2/6p1/4N3/P5P1/1PPPPP1P/R1QNKBBR w HAha -
 perft 1 25
 perft 2 717
 perft 3 19396
@@ -3872,7 +3872,7 @@ perft 5 16525239
 perft 6 507175842
 
 id 430
-epd rnq1krbb/p1p1pppp/8/1p1p4/1n5B/2N2P2/PPPPP1PP/RNQ1KR1B w FAfa - 0 9
+epd rnq1krbb/p1p1pppp/8/1p1p4/1n5B/2N2P2/PPPPP1PP/RNQ1KR1B w FAfa -
 perft 1 28
 perft 2 867
 perft 3 24029
@@ -3881,7 +3881,7 @@ perft 5 21112751
 perft 6 654808184
 
 id 431
-epd bbrnnqkr/1pp1pppp/3p4/p7/P3P3/7P/1PPP1PP1/BBRNNQKR w HChc - 0 9
+epd bbrnnqkr/1pp1pppp/3p4/p7/P3P3/7P/1PPP1PP1/BBRNNQKR w HChc -
 perft 1 24
 perft 2 405
 perft 3 11025
@@ -3890,7 +3890,7 @@ perft 5 6196438
 perft 6 131401224
 
 id 432
-epd brnbnqkr/p1ppp3/1p5p/5Pp1/5P2/3N4/PPPPP2P/BRNB1QKR w HBhb g6 0 9
+epd brnbnqkr/p1ppp3/1p5p/5Pp1/5P2/3N4/PPPPP2P/BRNB1QKR w HBhb g6
 perft 1 25
 perft 2 785
 perft 3 21402
@@ -3899,7 +3899,7 @@ perft 5 20687969
 perft 6 695850727
 
 id 433
-epd br1nqbkr/1ppppp2/pn6/6pp/2PP4/1N4P1/PP2PP1P/BR1NQBKR w HBhb - 0 9
+epd br1nqbkr/1ppppp2/pn6/6pp/2PP4/1N4P1/PP2PP1P/BR1NQBKR w HBhb -
 perft 1 25
 perft 2 596
 perft 3 16220
@@ -3908,7 +3908,7 @@ perft 5 12185361
 perft 6 337805606
 
 id 434
-epd 1rnnqkrb/p2ppp1p/1pp5/2N3p1/8/1P6/P1PPPPKP/BR1NQ1RB w gb - 0 9
+epd 1rnnqkrb/p2ppp1p/1pp5/2N3p1/8/1P6/P1PPPPKP/BR1NQ1RB w gb -
 perft 1 38
 perft 2 960
 perft 3 34831
@@ -3917,7 +3917,7 @@ perft 5 32490040
 perft 6 880403591
 
 id 435
-epd rbbnnqkr/pp3pp1/2p1p3/3p3p/3P3P/1PP5/P3PPP1/RBBNNQKR w HAha - 0 9
+epd rbbnnqkr/pp3pp1/2p1p3/3p3p/3P3P/1PP5/P3PPP1/RBBNNQKR w HAha -
 perft 1 30
 perft 2 785
 perft 3 23079
@@ -3926,7 +3926,7 @@ perft 5 19885037
 perft 6 599219582
 
 id 436
-epd rn1bnqkr/p1ppppp1/8/1p5p/P4P1P/3N4/1PPPP1b1/RNBB1QKR w HAha - 0 9
+epd rn1bnqkr/p1ppppp1/8/1p5p/P4P1P/3N4/1PPPP1b1/RNBB1QKR w HAha -
 perft 1 27
 perft 2 752
 perft 3 21735
@@ -3935,7 +3935,7 @@ perft 5 18862234
 perft 6 547415271
 
 id 437
-epd 1nbnqbkr/1p1p1ppp/r3p3/p1p5/P3P3/3Q4/1PPP1PPP/RNBN1BKR w HAh - 2 9
+epd 1nbnqbkr/1p1p1ppp/r3p3/p1p5/P3P3/3Q4/1PPP1PPP/RNBN1BKR w HAh -
 perft 1 33
 perft 2 721
 perft 3 24278
@@ -3944,7 +3944,7 @@ perft 5 19648535
 perft 6 496023732
 
 id 438
-epd rnbnqkrb/2pppppp/1p6/p7/1PP5/4N2P/P2PPPP1/RNB1QKRB w GAg - 0 9
+epd rnbnqkrb/2pppppp/1p6/p7/1PP5/4N2P/P2PPPP1/RNB1QKRB w GAg -
 perft 1 23
 perft 2 570
 perft 3 14225
@@ -3953,7 +3953,7 @@ perft 5 10022614
 perft 6 279545007
 
 id 439
-epd rbnnbq1r/ppppppkp/6p1/N7/4P3/P7/1PPP1PPP/RB1NBQKR w HA - 5 9
+epd rbnnbq1r/ppppppkp/6p1/N7/4P3/P7/1PPP1PPP/RB1NBQKR w HA -
 perft 1 27
 perft 2 620
 perft 3 18371
@@ -3962,7 +3962,7 @@ perft 5 13909432
 perft 6 349478320
 
 id 440
-epd r1nbbqkr/pppppp1p/8/8/1n3Pp1/3N1QP1/PPPPP2P/RN1BB1KR w HAha - 0 9
+epd r1nbbqkr/pppppp1p/8/8/1n3Pp1/3N1QP1/PPPPP2P/RN1BB1KR w HAha -
 perft 1 31
 perft 2 791
 perft 3 25431
@@ -3971,7 +3971,7 @@ perft 5 22408813
 perft 6 636779732
 
 id 441
-epd rnq1bbkr/pp1p1ppp/2pnp3/8/7P/1QP5/PP1PPPPR/RNN1BBK1 w Aha - 2 9
+epd rnq1bbkr/pp1p1ppp/2pnp3/8/7P/1QP5/PP1PPPPR/RNN1BBK1 w Aha -
 perft 1 28
 perft 2 559
 perft 3 16838
@@ -3980,7 +3980,7 @@ perft 5 12242780
 perft 6 315431511
 
 id 442
-epd rnnqbrkb/2ppppp1/1p1N4/p6p/4P3/8/PPPP1PPP/R1NQBKRB w GA - 0 9
+epd rnnqbrkb/2ppppp1/1p1N4/p6p/4P3/8/PPPP1PPP/R1NQBKRB w GA -
 perft 1 32
 perft 2 638
 perft 3 20591
@@ -3989,7 +3989,7 @@ perft 5 14395828
 perft 6 331782223
 
 id 443
-epd rbnnq1br/pppp1kp1/4pp2/7p/PP6/2PP4/4PPPP/RBNNQKBR w HA - 0 9
+epd rbnnq1br/pppp1kp1/4pp2/7p/PP6/2PP4/4PPPP/RBNNQKBR w HA -
 perft 1 21
 perft 2 521
 perft 3 12201
@@ -3998,7 +3998,7 @@ perft 5 8239159
 perft 6 227346638
 
 id 444
-epd rnnbqkbr/p2ppp2/7p/1pp3p1/2P2N2/8/PP1PPPPP/RN1BQKBR w HAha - 0 9
+epd rnnbqkbr/p2ppp2/7p/1pp3p1/2P2N2/8/PP1PPPPP/RN1BQKBR w HAha -
 perft 1 25
 perft 2 528
 perft 3 13896
@@ -4007,7 +4007,7 @@ perft 5 9079829
 perft 6 232750602
 
 id 445
-epd rnn1kbbr/ppppqp2/6p1/2N1p2p/P7/2P5/1P1PPPPP/RN1QKBBR w HAha - 2 9
+epd rnn1kbbr/ppppqp2/6p1/2N1p2p/P7/2P5/1P1PPPPP/RN1QKBBR w HAha -
 perft 1 27
 perft 2 801
 perft 3 22088
@@ -4016,7 +4016,7 @@ perft 5 20334071
 perft 6 682580976
 
 id 446
-epd rnnqkrbb/p1p1p1pp/1p3p2/8/3p2Q1/P1P1P3/1P1P1PPP/RNN1KRBB w FAfa - 0 9
+epd rnnqkrbb/p1p1p1pp/1p3p2/8/3p2Q1/P1P1P3/1P1P1PPP/RNN1KRBB w FAfa -
 perft 1 37
 perft 2 1014
 perft 3 34735
@@ -4025,7 +4025,7 @@ perft 5 32921537
 perft 6 988770109
 
 id 447
-epd bbrnk1qr/1pppppp1/p4n1p/8/P2P2N1/8/1PP1PPPP/BBR1NKQR w HC - 1 9
+epd bbrnk1qr/1pppppp1/p4n1p/8/P2P2N1/8/1PP1PPPP/BBR1NKQR w HC -
 perft 1 21
 perft 2 481
 perft 3 11213
@@ -4034,7 +4034,7 @@ perft 5 7015419
 perft 6 187564853
 
 id 448
-epd brnbnkqr/1pp1p1p1/p2p1p2/7p/1P4PP/8/PBPPPP2/1RNBNKQR w HBhb - 0 9
+epd brnbnkqr/1pp1p1p1/p2p1p2/7p/1P4PP/8/PBPPPP2/1RNBNKQR w HBhb -
 perft 1 31
 perft 2 743
 perft 3 24260
@@ -4043,7 +4043,7 @@ perft 5 22391185
 perft 6 653721389
 
 id 449
-epd br2kbqr/ppppp1pp/3n1p2/3P4/3n3P/3N4/PPP1PPP1/BR1NKBQR w HBhb - 3 9
+epd br2kbqr/ppppp1pp/3n1p2/3P4/3n3P/3N4/PPP1PPP1/BR1NKBQR w HBhb -
 perft 1 25
 perft 2 872
 perft 3 22039
@@ -4052,7 +4052,7 @@ perft 5 20281962
 perft 6 685749952
 
 id 450
-epd br1nkqrb/ppppppp1/8/7p/4P3/n1P2PP1/PP1P3P/BRNNKQRB w GBgb - 0 9
+epd br1nkqrb/ppppppp1/8/7p/4P3/n1P2PP1/PP1P3P/BRNNKQRB w GBgb -
 perft 1 28
 perft 2 607
 perft 3 16934
@@ -4061,7 +4061,7 @@ perft 5 11607818
 perft 6 294181806
 
 id 451
-epd rbbn1kqr/pp1pp1p1/2pn3p/5p2/5P2/1P1N4/PNPPP1PP/RBB2KQR w HAha - 1 9
+epd rbbn1kqr/pp1pp1p1/2pn3p/5p2/5P2/1P1N4/PNPPP1PP/RBB2KQR w HAha -
 perft 1 27
 perft 2 725
 perft 3 21543
@@ -4070,7 +4070,7 @@ perft 5 19239812
 perft 6 581716972
 
 id 452
-epd rnbbnk1r/pp1ppp1p/6q1/2p5/PP4p1/4P3/2PP1PPP/RNBBNKQR w HAha - 1 9
+epd rnbbnk1r/pp1ppp1p/6q1/2p5/PP4p1/4P3/2PP1PPP/RNBBNKQR w HAha -
 perft 1 25
 perft 2 1072
 perft 3 26898
@@ -4079,7 +4079,7 @@ perft 5 28469879
 perft 6 1122703887
 
 id 453
-epd rnbnkbqr/1pp3pp/3p4/p3pp2/3P2P1/2N1N3/PPP1PP1P/R1B1KBQR w HAha - 0 9
+epd rnbnkbqr/1pp3pp/3p4/p3pp2/3P2P1/2N1N3/PPP1PP1P/R1B1KBQR w HAha -
 perft 1 31
 perft 2 1028
 perft 3 32907
@@ -4088,7 +4088,7 @@ perft 5 36025223
 perft 6 1211187800
 
 id 454
-epd r1bnkqrb/1ppppppp/p3n3/8/6P1/4N3/PPPPPPRP/RNB1KQ1B w Aga - 1 9
+epd r1bnkqrb/1ppppppp/p3n3/8/6P1/4N3/PPPPPPRP/RNB1KQ1B w Aga -
 perft 1 23
 perft 2 457
 perft 3 11416
@@ -4097,7 +4097,7 @@ perft 5 6666787
 perft 6 159759052
 
 id 455
-epd rbn1bkqr/p1pp1pp1/1pn5/4p2p/7P/1PBP4/P1P1PPP1/RBNN1KQR w HAha - 0 9
+epd rbn1bkqr/p1pp1pp1/1pn5/4p2p/7P/1PBP4/P1P1PPP1/RBNN1KQR w HAha -
 perft 1 23
 perft 2 470
 perft 3 11649
@@ -4106,7 +4106,7 @@ perft 5 6963287
 perft 6 172833738
 
 id 456
-epd rnnbbkqr/3ppppp/p7/1pp5/P6P/6P1/1PPPPP2/RNNBBKQR w HAha - 0 9
+epd rnnbbkqr/3ppppp/p7/1pp5/P6P/6P1/1PPPPP2/RNNBBKQR w HAha -
 perft 1 26
 perft 2 569
 perft 3 15733
@@ -4115,7 +4115,7 @@ perft 5 11008114
 perft 6 284485303
 
 id 457
-epd r1nk1bqr/1pppp1pp/2n5/p4p1b/5P2/1N4B1/PPPPP1PP/RN1K1BQR w HAha - 2 9
+epd r1nk1bqr/1pppp1pp/2n5/p4p1b/5P2/1N4B1/PPPPP1PP/RN1K1BQR w HAha -
 perft 1 25
 perft 2 824
 perft 3 21983
@@ -4124,7 +4124,7 @@ perft 5 20904119
 perft 6 716170771
 
 id 458
-epd r1nkbqrb/p2pppp1/npp4p/8/4PP2/2N4P/PPPP2P1/R1NKBQRB w GAga - 0 9
+epd r1nkbqrb/p2pppp1/npp4p/8/4PP2/2N4P/PPPP2P1/R1NKBQRB w GAga -
 perft 1 31
 perft 2 548
 perft 3 17480
@@ -4133,7 +4133,7 @@ perft 5 11469548
 perft 6 255067638
 
 id 459
-epd rbnnkqbr/ppppp2p/5p2/6p1/2P1B3/P6P/1P1PPPP1/R1NNKQBR w HAha - 1 9
+epd rbnnkqbr/ppppp2p/5p2/6p1/2P1B3/P6P/1P1PPPP1/R1NNKQBR w HAha -
 perft 1 31
 perft 2 809
 perft 3 24956
@@ -4142,7 +4142,7 @@ perft 5 21247414
 perft 6 606221516
 
 id 460
-epd 1r1bkqbr/pppp1ppp/2nnp3/8/2P5/N4P2/PP1PP1PP/1RNBKQBR w Hh - 0 9
+epd 1r1bkqbr/pppp1ppp/2nnp3/8/2P5/N4P2/PP1PP1PP/1RNBKQBR w Hh -
 perft 1 28
 perft 2 810
 perft 3 22844
@@ -4151,7 +4151,7 @@ perft 5 20188622
 perft 6 636748147
 
 id 461
-epd rn1kqbbr/p1pppp1p/1p4p1/1n6/1P2P3/4Q2P/P1PP1PP1/RNNK1BBR w HAha - 1 9
+epd rn1kqbbr/p1pppp1p/1p4p1/1n6/1P2P3/4Q2P/P1PP1PP1/RNNK1BBR w HAha -
 perft 1 39
 perft 2 848
 perft 3 30100
@@ -4160,7 +4160,7 @@ perft 5 25594662
 perft 6 659615710
 
 id 462
-epd rn1kqrbb/pppppppp/8/8/2nP2P1/1P2P3/P1P2P1P/RNNKQRBB w FAfa - 1 9
+epd rn1kqrbb/pppppppp/8/8/2nP2P1/1P2P3/P1P2P1P/RNNKQRBB w FAfa -
 perft 1 29
 perft 2 766
 perft 3 21701
@@ -4169,7 +4169,7 @@ perft 5 16944425
 perft 6 456898648
 
 id 463
-epd b1rnnkrq/bpppppp1/7p/8/1p6/2B5/PNPPPPPP/1BR1NKRQ w GCgc - 2 9
+epd b1rnnkrq/bpppppp1/7p/8/1p6/2B5/PNPPPPPP/1BR1NKRQ w GCgc -
 perft 1 25
 perft 2 667
 perft 3 17253
@@ -4178,7 +4178,7 @@ perft 5 12865247
 perft 6 365621294
 
 id 464
-epd brnb1krq/pppppppp/8/5P2/2P1n2P/8/PP1PP1P1/BRNBNKRQ w GBgb - 1 9
+epd brnb1krq/pppppppp/8/5P2/2P1n2P/8/PP1PP1P1/BRNBNKRQ w GBgb -
 perft 1 23
 perft 2 620
 perft 3 14882
@@ -4187,7 +4187,7 @@ perft 5 10776855
 perft 6 300125003
 
 id 465
-epd b1nnkbrq/pr1pppp1/1p5p/2p5/P2N1P2/8/1PPPP1PP/BR1NKBRQ w GBg - 0 9
+epd b1nnkbrq/pr1pppp1/1p5p/2p5/P2N1P2/8/1PPPP1PP/BR1NKBRQ w GBg -
 perft 1 24
 perft 2 472
 perft 3 12181
@@ -4196,7 +4196,7 @@ perft 5 7370758
 perft 6 178605165
 
 id 466
-epd br1nkrqb/p1p1p1pp/3n4/1p1p1p2/5N1P/4P3/PPPP1PP1/BR1NKRQB w FBfb - 0 9
+epd br1nkrqb/p1p1p1pp/3n4/1p1p1p2/5N1P/4P3/PPPP1PP1/BR1NKRQB w FBfb -
 perft 1 24
 perft 2 775
 perft 3 19398
@@ -4205,7 +4205,7 @@ perft 5 16429837
 perft 6 539767605
 
 id 467
-epd rbbnnkrq/p2pp1pp/2p5/5p2/1pPP1B2/P7/1P2PPPP/RB1NNKRQ w GAga - 0 9
+epd rbbnnkrq/p2pp1pp/2p5/5p2/1pPP1B2/P7/1P2PPPP/RB1NNKRQ w GAga -
 perft 1 34
 perft 2 921
 perft 3 30474
@@ -4214,7 +4214,7 @@ perft 5 28095833
 perft 6 806446436
 
 id 468
-epd rnbbnkr1/1p1ppp1p/2p3p1/p7/2Pq4/1P1P4/P2BPPPP/RN1BNKRQ w GAga - 2 9
+epd rnbbnkr1/1p1ppp1p/2p3p1/p7/2Pq4/1P1P4/P2BPPPP/RN1BNKRQ w GAga -
 perft 1 26
 perft 2 1139
 perft 3 29847
@@ -4223,7 +4223,7 @@ perft 5 32825932
 perft 6 1281760240
 
 id 469
-epd 1rbnkbrq/pppppp2/n5pp/2P5/P7/4N3/1P1PPPPP/RNB1KBRQ w GAg - 2 9
+epd 1rbnkbrq/pppppp2/n5pp/2P5/P7/4N3/1P1PPPPP/RNB1KBRQ w GAg -
 perft 1 23
 perft 2 574
 perft 3 14146
@@ -4232,7 +4232,7 @@ perft 5 10203438
 perft 6 301874034
 
 id 470
-epd 1nbnkr1b/rppppppq/p7/7p/1P5P/3P2P1/P1P1PP2/RNBNKRQB w FAf - 1 9
+epd 1nbnkr1b/rppppppq/p7/7p/1P5P/3P2P1/P1P1PP2/RNBNKRQB w FAf -
 perft 1 33
 perft 2 823
 perft 3 26696
@@ -4241,7 +4241,7 @@ perft 5 23266182
 perft 6 672294132
 
 id 471
-epd rbn1bkrq/ppppp3/4n2p/5pp1/1PN5/2P5/P2PPPPP/RBN1BKRQ w GAga - 0 9
+epd rbn1bkrq/ppppp3/4n2p/5pp1/1PN5/2P5/P2PPPPP/RBN1BKRQ w GAga -
 perft 1 27
 perft 2 859
 perft 3 24090
@@ -4250,7 +4250,7 @@ perft 5 23075785
 perft 6 789152120
 
 id 472
-epd r1nbbkrq/1ppp2pp/2n2p2/p3p3/5P2/1N4BP/PPPPP1P1/RN1B1KRQ w GAga - 0 9
+epd r1nbbkrq/1ppp2pp/2n2p2/p3p3/5P2/1N4BP/PPPPP1P1/RN1B1KRQ w GAga -
 perft 1 25
 perft 2 774
 perft 3 20141
@@ -4259,7 +4259,7 @@ perft 5 16718577
 perft 6 515864053
 
 id 473
-epd rnnkbbrq/1pppp1p1/5p2/7p/p6P/3N1P2/PPPPP1PQ/RN1KBBR1 w GAga - 0 9
+epd rnnkbbrq/1pppp1p1/5p2/7p/p6P/3N1P2/PPPPP1PQ/RN1KBBR1 w GAga -
 perft 1 29
 perft 2 673
 perft 3 20098
@@ -4268,7 +4268,7 @@ perft 5 15545590
 perft 6 416359581
 
 id 474
-epd r1nkbrqb/pppp1p2/n3p1p1/7p/2P2P2/1P6/P2PPQPP/RNNKBR1B w FAfa - 0 9
+epd r1nkbrqb/pppp1p2/n3p1p1/7p/2P2P2/1P6/P2PPQPP/RNNKBR1B w FAfa -
 perft 1 27
 perft 2 722
 perft 3 21397
@@ -4277,7 +4277,7 @@ perft 5 18742426
 perft 6 537750982
 
 id 475
-epd rbnnkr1q/1ppp2pp/p4p2/P2bp3/4P2P/8/1PPP1PP1/RBNNKRBQ w FAfa - 1 9
+epd rbnnkr1q/1ppp2pp/p4p2/P2bp3/4P2P/8/1PPP1PP1/RBNNKRBQ w FAfa -
 perft 1 26
 perft 2 848
 perft 3 23387
@@ -4286,7 +4286,7 @@ perft 5 21591790
 perft 6 675163653
 
 id 476
-epd rn1bkrb1/1ppppp1p/pn4p1/8/P2q3P/3P4/NPP1PPP1/RN1BKRBQ w FAfa - 1 9
+epd rn1bkrb1/1ppppp1p/pn4p1/8/P2q3P/3P4/NPP1PPP1/RN1BKRBQ w FAfa -
 perft 1 22
 perft 2 803
 perft 3 18322
@@ -4295,7 +4295,7 @@ perft 5 15847763
 perft 6 536419559
 
 id 477
-epd rn1krbbq/pppp1npp/4pp2/8/4P2P/3P2P1/PPP2P2/RNNKRBBQ w EAea - 1 9
+epd rn1krbbq/pppp1npp/4pp2/8/4P2P/3P2P1/PPP2P2/RNNKRBBQ w EAea -
 perft 1 29
 perft 2 810
 perft 3 23968
@@ -4304,7 +4304,7 @@ perft 5 20361517
 perft 6 575069358
 
 id 478
-epd rnn1rqbb/ppkp1pp1/2p1p2p/2P5/8/3P1P2/PP2P1PP/RNNKRQBB w EA - 0 9
+epd rnn1rqbb/ppkp1pp1/2p1p2p/2P5/8/3P1P2/PP2P1PP/RNNKRQBB w EA -
 perft 1 22
 perft 2 506
 perft 3 11973
@@ -4313,7 +4313,7 @@ perft 5 7287368
 perft 6 189865944
 
 id 479
-epd bbqr1knr/pppppp1p/8/4n1p1/2P1P3/6P1/PPQP1P1P/BB1RNKNR w HDhd - 0 9
+epd bbqr1knr/pppppp1p/8/4n1p1/2P1P3/6P1/PPQP1P1P/BB1RNKNR w HDhd -
 perft 1 26
 perft 2 650
 perft 3 18253
@@ -4322,7 +4322,7 @@ perft 5 14301029
 perft 6 394943978
 
 id 480
-epd bq1bnknr/pprppp1p/8/2p3p1/4PPP1/8/PPPP3P/BQRBNKNR w HCh - 0 9
+epd bq1bnknr/pprppp1p/8/2p3p1/4PPP1/8/PPPP3P/BQRBNKNR w HCh -
 perft 1 24
 perft 2 548
 perft 3 14021
@@ -4331,7 +4331,7 @@ perft 5 9374021
 perft 6 250988458
 
 id 481
-epd bqrnkb1r/1p2pppp/p1pp3n/5Q2/2P4P/5N2/PP1PPPP1/B1RNKB1R w HChc - 0 9
+epd bqrnkb1r/1p2pppp/p1pp3n/5Q2/2P4P/5N2/PP1PPPP1/B1RNKB1R w HChc -
 perft 1 46
 perft 2 823
 perft 3 33347
@@ -4340,7 +4340,7 @@ perft 5 26130444
 perft 6 582880996
 
 id 482
-epd bq1rknrb/pppppp1p/4n3/6p1/4P1P1/3P1P2/PPP4P/BQRNKNRB w GCg - 0 9
+epd bq1rknrb/pppppp1p/4n3/6p1/4P1P1/3P1P2/PPP4P/BQRNKNRB w GCg -
 perft 1 23
 perft 2 618
 perft 3 14815
@@ -4349,7 +4349,7 @@ perft 5 10606831
 perft 6 315124518
 
 id 483
-epd q1brnknr/pp1pp1p1/8/2p2p1p/5b2/P4N2/1PPPP1PP/QBBRK1NR w hd - 0 9
+epd q1brnknr/pp1pp1p1/8/2p2p1p/5b2/P4N2/1PPPP1PP/QBBRK1NR w hd -
 perft 1 22
 perft 2 675
 perft 3 15778
@@ -4358,7 +4358,7 @@ perft 5 12077228
 perft 6 368479752
 
 id 484
-epd qrbbnknr/1p1ppp1p/p1p5/8/1P2P1p1/3P1B2/P1P2PPP/QRB1NKNR w HBhb - 0 9
+epd qrbbnknr/1p1ppp1p/p1p5/8/1P2P1p1/3P1B2/P1P2PPP/QRB1NKNR w HBhb -
 perft 1 32
 perft 2 722
 perft 3 24049
@@ -4367,7 +4367,7 @@ perft 5 19584539
 perft 6 484814878
 
 id 485
-epd qrb1kbnr/p3pppp/2n5/1ppp4/7P/3P1P2/PPP1P1PR/QRBNKBN1 w Bhb - 0 9
+epd qrb1kbnr/p3pppp/2n5/1ppp4/7P/3P1P2/PPP1P1PR/QRBNKBN1 w Bhb -
 perft 1 26
 perft 2 831
 perft 3 22606
@@ -4376,7 +4376,7 @@ perft 5 20500804
 perft 6 662608969
 
 id 486
-epd qrbnknrb/ppp1pp2/6p1/7p/PPNp4/8/2PPPPPP/QRB1KNRB w GBgb - 0 9
+epd qrbnknrb/ppp1pp2/6p1/7p/PPNp4/8/2PPPPPP/QRB1KNRB w GBgb -
 perft 1 31
 perft 2 840
 perft 3 26762
@@ -4385,7 +4385,7 @@ perft 5 24422614
 perft 6 701363800
 
 id 487
-epd qbrnbknr/pp1pp1pp/8/2p2p2/3Q4/PP6/2PPPPPP/1BRNBKNR w HChc - 0 9
+epd qbrnbknr/pp1pp1pp/8/2p2p2/3Q4/PP6/2PPPPPP/1BRNBKNR w HChc -
 perft 1 38
 perft 2 1121
 perft 3 39472
@@ -4394,7 +4394,7 @@ perft 5 41108769
 perft 6 1285503872
 
 id 488
-epd qr1bbk1r/pppppp1p/1n6/5np1/4B3/1PP5/P2PPPPP/QRN1BKNR w HBhb - 0 9
+epd qr1bbk1r/pppppp1p/1n6/5np1/4B3/1PP5/P2PPPPP/QRN1BKNR w HBhb -
 perft 1 25
 perft 2 694
 perft 3 16938
@@ -4403,7 +4403,7 @@ perft 5 12164609
 perft 6 345122090
 
 id 489
-epd qrnkbbnr/1p1pp2p/p7/2p1Npp1/6P1/7P/PPPPPP2/QR1KBBNR w HBhb - 0 9
+epd qrnkbbnr/1p1pp2p/p7/2p1Npp1/6P1/7P/PPPPPP2/QR1KBBNR w HBhb -
 perft 1 27
 perft 2 586
 perft 3 16348
@@ -4412,7 +4412,7 @@ perft 5 11409633
 perft 6 298054792
 
 id 490
-epd qrnkbnrb/pp1p1p2/2p1p1pp/4N3/P4P2/8/1PPPP1PP/QR1KBNRB w GBgb - 0 9
+epd qrnkbnrb/pp1p1p2/2p1p1pp/4N3/P4P2/8/1PPPP1PP/QR1KBNRB w GBgb -
 perft 1 32
 perft 2 645
 perft 3 20737
@@ -4421,7 +4421,7 @@ perft 5 15037464
 perft 6 358531599
 
 id 491
-epd qbrnknbr/1pppppp1/p6p/8/1P6/3PP3/PQP2PPP/1BRNKNBR w HChc - 3 9
+epd qbrnknbr/1pppppp1/p6p/8/1P6/3PP3/PQP2PPP/1BRNKNBR w HChc -
 perft 1 26
 perft 2 595
 perft 3 16755
@@ -4430,7 +4430,7 @@ perft 5 12214768
 perft 6 323518628
 
 id 492
-epd qrnbk1br/1ppppp1p/p5p1/8/4Pn2/4K1P1/PPPP1P1P/QRNB1NBR w hb - 0 9
+epd qrnbk1br/1ppppp1p/p5p1/8/4Pn2/4K1P1/PPPP1P1P/QRNB1NBR w hb -
 perft 1 24
 perft 2 609
 perft 3 13776
@@ -4439,7 +4439,7 @@ perft 5 8538539
 perft 6 230364479
 
 id 493
-epd qrnk1bbr/1pnp1ppp/p1p1p3/8/3Q4/1P1N3P/P1PPPPP1/1RNK1BBR w HBhb - 0 9
+epd qrnk1bbr/1pnp1ppp/p1p1p3/8/3Q4/1P1N3P/P1PPPPP1/1RNK1BBR w HBhb -
 perft 1 43
 perft 2 1106
 perft 3 42898
@@ -4448,7 +4448,7 @@ perft 5 41695761
 perft 6 1113836402
 
 id 494
-epd qrnknrb1/pppppp2/8/6pp/4P2P/3P1P2/PbP3P1/QRNKNRBB w FBfb - 0 9
+epd qrnknrb1/pppppp2/8/6pp/4P2P/3P1P2/PbP3P1/QRNKNRBB w FBfb -
 perft 1 24
 perft 2 658
 perft 3 17965
@@ -4457,7 +4457,7 @@ perft 5 14457245
 perft 6 400971226
 
 id 495
-epd bbrqnrk1/ppp2ppp/7n/3pp3/8/P4N1N/1PPPPPPP/BBRQ1RK1 w - - 1 9
+epd bbrqnrk1/ppp2ppp/7n/3pp3/8/P4N1N/1PPPPPPP/BBRQ1RK1 w - -
 perft 1 22
 perft 2 503
 perft 3 12078
@@ -4466,7 +4466,7 @@ perft 5 8080951
 perft 6 224960353
 
 id 496
-epd brqbnk1r/1ppp1ppp/8/p3pn2/8/2PP1P2/PP2PKPP/BRQBN1NR w hb - 1 9
+epd brqbnk1r/1ppp1ppp/8/p3pn2/8/2PP1P2/PP2PKPP/BRQBN1NR w hb -
 perft 1 25
 perft 2 745
 perft 3 19387
@@ -4475,7 +4475,7 @@ perft 5 15520298
 perft 6 460840861
 
 id 497
-epd brqnkbnr/pp2pp1p/3p4/2p5/5p2/3P3P/PPP1PPP1/B1RNKBNR w Hhb - 0 9
+epd brqnkbnr/pp2pp1p/3p4/2p5/5p2/3P3P/PPP1PPP1/B1RNKBNR w Hhb -
 perft 1 19
 perft 2 516
 perft 3 10755
@@ -4484,7 +4484,7 @@ perft 5 6995034
 perft 6 214340699
 
 id 498
-epd brq1kn1b/1ppppprp/2n3p1/p7/P1N5/6P1/1PPPPP1P/BRQNK1RB w GBb - 2 9
+epd brq1kn1b/1ppppprp/2n3p1/p7/P1N5/6P1/1PPPPP1P/BRQNK1RB w GBb -
 perft 1 29
 perft 2 557
 perft 3 16739
@@ -4493,7 +4493,7 @@ perft 5 10840256
 perft 6 249999654
 
 id 499
-epd rbbq1k1r/ppp1pppp/7n/1n1p4/5P2/P2P4/1PPBP1PP/RB1QNKNR w HAha - 1 9
+epd rbbq1k1r/ppp1pppp/7n/1n1p4/5P2/P2P4/1PPBP1PP/RB1QNKNR w HAha -
 perft 1 25
 perft 2 769
 perft 3 20110
@@ -4502,7 +4502,7 @@ perft 5 17438715
 perft 6 570893953
 
 id 500
-epd r1bbnk1r/qpp1pppp/p6n/3p4/1P6/5N1P/P1PPPPP1/RQBBK1NR w ha - 0 9
+epd r1bbnk1r/qpp1pppp/p6n/3p4/1P6/5N1P/P1PPPPP1/RQBBK1NR w ha -
 perft 1 23
 perft 2 728
 perft 3 18209
@@ -4511,7 +4511,7 @@ perft 5 16053564
 perft 6 529082811
 
 id 501
-epd rqbnkbnr/1pp2p1p/3p4/p3p1p1/8/2P2P2/PP1PPNPP/RQBNKB1R w HAha - 0 9
+epd rqbnkbnr/1pp2p1p/3p4/p3p1p1/8/2P2P2/PP1PPNPP/RQBNKB1R w HAha -
 perft 1 26
 perft 2 772
 perft 3 21903
@@ -4520,7 +4520,7 @@ perft 5 19571559
 perft 6 593915677
 
 id 502
-epd r1bnknrb/pqppp1p1/1p5p/5p2/7P/3P2N1/PPP1PPP1/RQBNK1RB w GAga - 2 9
+epd r1bnknrb/pqppp1p1/1p5p/5p2/7P/3P2N1/PPP1PPP1/RQBNK1RB w GAga -
 perft 1 27
 perft 2 748
 perft 3 20291
@@ -4529,7 +4529,7 @@ perft 5 16324542
 perft 6 506453626
 
 id 503
-epd rbqnbknr/pp1pppp1/8/2p5/3P3p/5N1P/PPP1PPPR/RBQNBK2 w Aha - 0 9
+epd rbqnbknr/pp1pppp1/8/2p5/3P3p/5N1P/PPP1PPPR/RBQNBK2 w Aha -
 perft 1 30
 perft 2 859
 perft 3 26785
@@ -4538,7 +4538,7 @@ perft 5 26363334
 perft 6 842796987
 
 id 504
-epd rqnbbrk1/ppppppp1/8/5n1p/3P3P/2B3P1/PPP1PP2/RQNB1KNR w HA - 0 9
+epd rqnbbrk1/ppppppp1/8/5n1p/3P3P/2B3P1/PPP1PP2/RQNB1KNR w HA -
 perft 1 22
 perft 2 505
 perft 3 11452
@@ -4547,7 +4547,7 @@ perft 5 7055215
 perft 6 186760784
 
 id 505
-epd rqnkbbnr/pp2p1p1/8/2pp1p1p/3PPP2/8/PPP1N1PP/RQNKBB1R w HAha - 0 9
+epd rqnkbbnr/pp2p1p1/8/2pp1p1p/3PPP2/8/PPP1N1PP/RQNKBB1R w HAha -
 perft 1 28
 perft 2 832
 perft 3 23142
@@ -4556,7 +4556,7 @@ perft 5 20429246
 perft 6 663183060
 
 id 506
-epd rqnkbnr1/pppp2bp/6p1/4pp2/1P2P3/3NN3/P1PP1PPP/RQ1KB1RB w GAga - 0 9
+epd rqnkbnr1/pppp2bp/6p1/4pp2/1P2P3/3NN3/P1PP1PPP/RQ1KB1RB w GAga -
 perft 1 28
 perft 2 641
 perft 3 18835
@@ -4565,7 +4565,7 @@ perft 5 14038570
 perft 6 364210162
 
 id 507
-epd rbq2kbr/pppppppp/2n5/P7/3P1n2/2P5/1P2PPPP/RBQNKNBR w HA - 1 9
+epd rbq2kbr/pppppppp/2n5/P7/3P1n2/2P5/1P2PPPP/RBQNKNBR w HA -
 perft 1 31
 perft 2 889
 perft 3 27028
@@ -4574,7 +4574,7 @@ perft 5 24299415
 perft 6 692180754
 
 id 508
-epd rq1bkn1r/ppppp2p/3n4/5pp1/2b3P1/1N1P1P2/PPP1P2P/RQ1BKNBR w HAha - 1 9
+epd rq1bkn1r/ppppp2p/3n4/5pp1/2b3P1/1N1P1P2/PPP1P2P/RQ1BKNBR w HAha -
 perft 1 28
 perft 2 810
 perft 3 22667
@@ -4583,7 +4583,7 @@ perft 5 18719949
 perft 6 556282676
 
 id 509
-epd r1nknbbr/p2ppp1p/1pp3p1/8/1P6/4P3/P1PPNPPq/R1QKNBBR w HAha - 0 9
+epd r1nknbbr/p2ppp1p/1pp3p1/8/1P6/4P3/P1PPNPPq/R1QKNBBR w HAha -
 perft 1 24
 perft 2 797
 perft 3 22144
@@ -4592,7 +4592,7 @@ perft 5 21862776
 perft 6 716521139
 
 id 510
-epd rqnknrbb/ppp1p3/5ppp/2Np4/2P5/4P3/PP1P1PPP/RQNK1RBB w FAfa - 0 9
+epd rqnknrbb/ppp1p3/5ppp/2Np4/2P5/4P3/PP1P1PPP/RQNK1RBB w FAfa -
 perft 1 34
 perft 2 686
 perft 3 23277
@@ -4601,7 +4601,7 @@ perft 5 17664543
 perft 6 423574794
 
 id 511
-epd 1brnqknr/2p1pppp/p2p4/1P6/6P1/4Nb2/PP1PPP1P/BBR1QKNR w HChc - 1 9
+epd 1brnqknr/2p1pppp/p2p4/1P6/6P1/4Nb2/PP1PPP1P/BBR1QKNR w HChc -
 perft 1 34
 perft 2 1019
 perft 3 32982
@@ -4610,7 +4610,7 @@ perft 5 33322477
 perft 6 1043293394
 
 id 512
-epd brn1qknr/1p1pppp1/pb5p/Q1p5/3P3P/8/PPP1PPPR/BRNB1KN1 w Bhb - 2 9
+epd brn1qknr/1p1pppp1/pb5p/Q1p5/3P3P/8/PPP1PPPR/BRNB1KN1 w Bhb -
 perft 1 32
 perft 2 642
 perft 3 20952
@@ -4619,7 +4619,7 @@ perft 5 15454749
 perft 6 371861782
 
 id 513
-epd brnqkbnr/pppppp2/8/6pp/6P1/P2P1P2/1PP1P2P/BRNQKBNR w HBhb - 0 9
+epd brnqkbnr/pppppp2/8/6pp/6P1/P2P1P2/1PP1P2P/BRNQKBNR w HBhb -
 perft 1 20
 perft 2 441
 perft 3 9782
@@ -4628,7 +4628,7 @@ perft 5 5770284
 perft 6 153051835
 
 id 514
-epd 2nqknrb/1rpppppp/5B2/pp6/1PP1b3/3P4/P3PPPP/1RNQKNRB w GBg - 1 9
+epd 2nqknrb/1rpppppp/5B2/pp6/1PP1b3/3P4/P3PPPP/1RNQKNRB w GBg -
 perft 1 35
 perft 2 1042
 perft 3 36238
@@ -4637,7 +4637,7 @@ perft 5 38505058
 perft 6 1202668717
 
 id 515
-epd rb1nqknr/1pp1pppp/8/3p4/p2P4/6PN/PPPQPP1P/RBBN1K1R w HAha - 0 9
+epd rb1nqknr/1pp1pppp/8/3p4/p2P4/6PN/PPPQPP1P/RBBN1K1R w HAha -
 perft 1 29
 perft 2 692
 perft 3 21237
@@ -4646,7 +4646,7 @@ perft 5 17820605
 perft 6 497251206
 
 id 516
-epd rnbbqknr/pppp4/5p2/4p1pp/P7/2N2PP1/1PPPP2P/R1BBQKNR w HAha - 0 9
+epd rnbbqknr/pppp4/5p2/4p1pp/P7/2N2PP1/1PPPP2P/R1BBQKNR w HAha -
 perft 1 23
 perft 2 595
 perft 3 14651
@@ -4655,7 +4655,7 @@ perft 5 10881112
 perft 6 329010121
 
 id 517
-epd rn1qkbnr/p1p1pp1p/bp4p1/3p4/1P6/4P3/P1PP1PPP/RNBQKBNR w HAha - 0 9
+epd rn1qkbnr/p1p1pp1p/bp4p1/3p4/1P6/4P3/P1PP1PPP/RNBQKBNR w HAha -
 perft 1 30
 perft 2 794
 perft 3 24319
@@ -4664,7 +4664,7 @@ perft 5 21657601
 perft 6 647745807
 
 id 518
-epd r1bqk1rb/pppnpppp/5n2/3p4/2P3PP/2N5/PP1PPP2/R1BQKNRB w GAga - 1 9
+epd r1bqk1rb/pppnpppp/5n2/3p4/2P3PP/2N5/PP1PPP2/R1BQKNRB w GAga -
 perft 1 32
 perft 2 821
 perft 3 27121
@@ -4673,7 +4673,7 @@ perft 5 24923473
 perft 6 710765657
 
 id 519
-epd rbnqbknr/1p1ppp1p/6p1/p1p5/7P/3P4/PPP1PPP1/RBNQBKNR w HAha - 0 9
+epd rbnqbknr/1p1ppp1p/6p1/p1p5/7P/3P4/PPP1PPP1/RBNQBKNR w HAha -
 perft 1 24
 perft 2 720
 perft 3 18842
@@ -4682,7 +4682,7 @@ perft 5 15992882
 perft 6 501093456
 
 id 520
-epd r1qbbk1r/pp1ppppp/n1p5/5n2/B1P3P1/8/PP1PPP1P/RNQ1BKNR w HAha - 0 9
+epd r1qbbk1r/pp1ppppp/n1p5/5n2/B1P3P1/8/PP1PPP1P/RNQ1BKNR w HAha -
 perft 1 27
 perft 2 831
 perft 3 22293
@@ -4691,7 +4691,7 @@ perft 5 19948650
 perft 6 637973209
 
 id 521
-epd rnqkbb1r/p1pppppp/8/8/1p4n1/PP4PP/2PPPP2/RNQKBBNR w HAha - 0 9
+epd rnqkbb1r/p1pppppp/8/8/1p4n1/PP4PP/2PPPP2/RNQKBBNR w HAha -
 perft 1 18
 perft 2 463
 perft 3 9519
@@ -4700,7 +4700,7 @@ perft 5 6065231
 perft 6 172734380
 
 id 522
-epd rnqk1nrb/pppbpp2/7p/3p2p1/4B3/2N1N1P1/PPPPPP1P/R1QKB1R1 w GAga - 0 9
+epd rnqk1nrb/pppbpp2/7p/3p2p1/4B3/2N1N1P1/PPPPPP1P/R1QKB1R1 w GAga -
 perft 1 34
 perft 2 1171
 perft 3 38128
@@ -4709,7 +4709,7 @@ perft 5 42109356
 perft 6 1465473753
 
 id 523
-epd rbnqknbr/1pp1ppp1/3p4/7p/p2P2PP/2P5/PP2PP2/RBNQKNBR w HAha - 0 9
+epd rbnqknbr/1pp1ppp1/3p4/7p/p2P2PP/2P5/PP2PP2/RBNQKNBR w HAha -
 perft 1 32
 perft 2 867
 perft 3 28342
@@ -4718,7 +4718,7 @@ perft 5 26632459
 perft 6 781067145
 
 id 524
-epd rn1bknbr/pq2pppp/1p6/2pp4/P7/1P1P4/2PNPPPP/RNQBK1BR w HAha - 0 9
+epd rn1bknbr/pq2pppp/1p6/2pp4/P7/1P1P4/2PNPPPP/RNQBK1BR w HAha -
 perft 1 24
 perft 2 627
 perft 3 16652
@@ -4727,7 +4727,7 @@ perft 5 13200921
 perft 6 385193532
 
 id 525
-epd r1qk1bbr/ppp1pp1p/2np1n2/6p1/2PP4/3BP3/PP3PPP/RNQKN1BR w HAha - 2 9
+epd r1qk1bbr/ppp1pp1p/2np1n2/6p1/2PP4/3BP3/PP3PPP/RNQKN1BR w HAha -
 perft 1 31
 perft 2 992
 perft 3 30213
@@ -4736,7 +4736,7 @@ perft 5 30397368
 perft 6 1011631987
 
 id 526
-epd r1qknrbb/pppp1p2/2n3p1/4p2p/8/QPP5/P1NPPPPP/RN1K1RBB w FAfa - 2 9
+epd r1qknrbb/pppp1p2/2n3p1/4p2p/8/QPP5/P1NPPPPP/RN1K1RBB w FAfa -
 perft 1 30
 perft 2 702
 perft 3 21563
@@ -4745,7 +4745,7 @@ perft 5 16813114
 perft 6 438096194
 
 id 527
-epd bbkr1qnr/2pppppp/2n5/pp6/8/PPN5/1BPPPPPP/1BR1KQNR w HC - 2 9
+epd bbkr1qnr/2pppppp/2n5/pp6/8/PPN5/1BPPPPPP/1BR1KQNR w HC -
 perft 1 25
 perft 2 573
 perft 3 15183
@@ -4754,7 +4754,7 @@ perft 5 10554668
 perft 6 283975400
 
 id 528
-epd 1rnbkqnr/1bpppppp/1p6/7P/p2P4/5P2/PPP1P1P1/BRNBKQNR w HBhb - 0 9
+epd 1rnbkqnr/1bpppppp/1p6/7P/p2P4/5P2/PPP1P1P1/BRNBKQNR w HBhb -
 perft 1 21
 perft 2 503
 perft 3 11790
@@ -4763,7 +4763,7 @@ perft 5 7679979
 perft 6 207799378
 
 id 529
-epd brnkqbnr/2p1pppp/1p6/3p4/1pP5/P6P/3PPPP1/BRNKQBNR w HBhb - 0 9
+epd brnkqbnr/2p1pppp/1p6/3p4/1pP5/P6P/3PPPP1/BRNKQBNR w HBhb -
 perft 1 28
 perft 2 743
 perft 3 21054
@@ -4772,7 +4772,7 @@ perft 5 17354516
 perft 6 507176753
 
 id 530
-epd br1kqnrb/npp1pppp/8/3p4/p4N2/PP6/2PPPPPP/BR1KQNRB w GBgb - 0 9
+epd br1kqnrb/npp1pppp/8/3p4/p4N2/PP6/2PPPPPP/BR1KQNRB w GBgb -
 perft 1 31
 perft 2 808
 perft 3 25585
@@ -4781,7 +4781,7 @@ perft 5 22376575
 perft 6 640362920
 
 id 531
-epd rbbnkq1r/pppppp1p/7n/6p1/P5P1/2P2N2/1P1PPP1P/RBBNKQ1R w HAha - 1 9
+epd rbbnkq1r/pppppp1p/7n/6p1/P5P1/2P2N2/1P1PPP1P/RBBNKQ1R w HAha -
 perft 1 29
 perft 2 580
 perft 3 17585
@@ -4790,7 +4790,7 @@ perft 5 12730970
 perft 6 325226128
 
 id 532
-epd rnbbk1nr/pp2qppp/2ppp3/8/3P4/P1N4N/1PP1PPPP/R1BBKQ1R w HAha - 0 9
+epd rnbbk1nr/pp2qppp/2ppp3/8/3P4/P1N4N/1PP1PPPP/R1BBKQ1R w HAha -
 perft 1 29
 perft 2 838
 perft 3 24197
@@ -4799,7 +4799,7 @@ perft 5 21100580
 perft 6 646624429
 
 id 533
-epd rnbk1b1r/ppppn1pp/4pp2/7q/7P/P5PB/1PPPPP2/RNBKQ1NR w HAha - 3 9
+epd rnbk1b1r/ppppn1pp/4pp2/7q/7P/P5PB/1PPPPP2/RNBKQ1NR w HAha -
 perft 1 20
 perft 2 729
 perft 3 16633
@@ -4808,7 +4808,7 @@ perft 5 14507076
 perft 6 498621813
 
 id 534
-epd r2kqnrb/pbppppp1/np5p/8/4Q1P1/3P4/PPP1PP1P/RNBK1NRB w GAga - 2 9
+epd r2kqnrb/pbppppp1/np5p/8/4Q1P1/3P4/PPP1PP1P/RNBK1NRB w GAga -
 perft 1 47
 perft 2 1219
 perft 3 55009
@@ -4817,7 +4817,7 @@ perft 5 65239153
 perft 6 1834391369
 
 id 535
-epd rbnkbq1r/p1p2ppp/1p2pn2/3p4/P3P3/3P4/1PP1KPPP/RBN1BQNR w ha - 2 9
+epd rbnkbq1r/p1p2ppp/1p2pn2/3p4/P3P3/3P4/1PP1KPPP/RBN1BQNR w ha -
 perft 1 29
 perft 2 923
 perft 3 27179
@@ -4826,7 +4826,7 @@ perft 5 26202752
 perft 6 868565895
 
 id 536
-epd rk1bb1nr/ppppqppp/n7/1N2p3/6P1/7N/PPPPPP1P/R1KBBQ1R w HA - 6 9
+epd rk1bb1nr/ppppqppp/n7/1N2p3/6P1/7N/PPPPPP1P/R1KBBQ1R w HA -
 perft 1 27
 perft 2 703
 perft 3 19478
@@ -4835,7 +4835,7 @@ perft 5 16049807
 perft 6 492966455
 
 id 537
-epd rnkqbbnr/p1ppp2p/1p4p1/8/1B3p1P/2NP4/PPP1PPP1/R1KQ1BNR w HAha - 0 9
+epd rnkqbbnr/p1ppp2p/1p4p1/8/1B3p1P/2NP4/PPP1PPP1/R1KQ1BNR w HAha -
 perft 1 29
 perft 2 610
 perft 3 18855
@@ -4844,7 +4844,7 @@ perft 5 14020041
 perft 6 355083962
 
 id 538
-epd rnkqb1rb/pp1p1ppp/4p3/2P3n1/8/1PP5/P3PPPP/RNKQBNRB w GAga - 0 9
+epd rnkqb1rb/pp1p1ppp/4p3/2P3n1/8/1PP5/P3PPPP/RNKQBNRB w GAga -
 perft 1 29
 perft 2 675
 perft 3 20699
@@ -4853,7 +4853,7 @@ perft 5 17000613
 perft 6 476598337
 
 id 539
-epd rb1kqnbr/pp1pp1p1/1np2p2/7p/P1P3PP/8/1P1PPP2/RBNKQNBR w HAha - 0 9
+epd rb1kqnbr/pp1pp1p1/1np2p2/7p/P1P3PP/8/1P1PPP2/RBNKQNBR w HAha -
 perft 1 31
 perft 2 1077
 perft 3 33661
@@ -4862,7 +4862,7 @@ perft 5 37415304
 perft 6 1328374620
 
 id 540
-epd rnkbq1br/ppp2ppp/3p4/Q3p1n1/5P2/3P2P1/PPP1P2P/RNKB1NBR w HAha - 0 9
+epd rnkbq1br/ppp2ppp/3p4/Q3p1n1/5P2/3P2P1/PPP1P2P/RNKB1NBR w HAha -
 perft 1 41
 perft 2 1201
 perft 3 46472
@@ -4871,7 +4871,7 @@ perft 5 52991625
 perft 6 1675608008
 
 id 541
-epd rn1qnbbr/pp2pppp/2ppk3/8/2PP4/3Q1N2/PP2PPPP/RNK2BBR w HA - 1 9
+epd rn1qnbbr/pp2pppp/2ppk3/8/2PP4/3Q1N2/PP2PPPP/RNK2BBR w HA -
 perft 1 34
 perft 2 666
 perft 3 22474
@@ -4880,7 +4880,7 @@ perft 5 15860369
 perft 6 353831792
 
 id 542
-epd rnkqnr1b/ppppp1pp/5p2/8/Q1P2P2/8/PP1P2PP/RbK1NRBB w FAfa - 0 9
+epd rnkqnr1b/ppppp1pp/5p2/8/Q1P2P2/8/PP1P2PP/RbK1NRBB w FAfa -
 perft 1 36
 perft 2 876
 perft 3 31987
@@ -4889,7 +4889,7 @@ perft 5 29022529
 perft 6 736717252
 
 id 543
-epd bbrn1nqr/ppp1k1pp/5p2/3pp3/7P/3PN3/PPP1PPP1/BBRK1NQR w - - 1 9
+epd bbrn1nqr/ppp1k1pp/5p2/3pp3/7P/3PN3/PPP1PPP1/BBRK1NQR w - -
 perft 1 24
 perft 2 583
 perft 3 15063
@@ -4898,7 +4898,7 @@ perft 5 10522064
 perft 6 280707118
 
 id 544
-epd brnbkn1r/1pppp1p1/4q3/p4p1p/7P/1N3P2/PPPPP1PQ/BR1BKN1R w HBhb - 2 9
+epd brnbkn1r/1pppp1p1/4q3/p4p1p/7P/1N3P2/PPPPP1PQ/BR1BKN1R w HBhb -
 perft 1 27
 perft 2 935
 perft 3 26120
@@ -4907,7 +4907,7 @@ perft 5 26000648
 perft 6 873063158
 
 id 545
-epd br1knbqr/pp2p1pp/1n6/2pp1p2/6P1/2P4B/PP1PPPQP/BRNKN2R w HBhb - 0 9
+epd br1knbqr/pp2p1pp/1n6/2pp1p2/6P1/2P4B/PP1PPPQP/BRNKN2R w HBhb -
 perft 1 27
 perft 2 681
 perft 3 19202
@@ -4916,7 +4916,7 @@ perft 5 14954779
 perft 6 415624943
 
 id 546
-epd brnk1qrb/p1ppppp1/1p5p/8/P3n3/1N4P1/1PPPPPRP/BR1KNQ1B w Bgb - 0 9
+epd brnk1qrb/p1ppppp1/1p5p/8/P3n3/1N4P1/1PPPPPRP/BR1KNQ1B w Bgb -
 perft 1 22
 perft 2 638
 perft 3 13991
@@ -4925,7 +4925,7 @@ perft 5 9760752
 perft 6 293499724
 
 id 547
-epd rbbnknqr/pppp3p/5pp1/8/1P1pP3/7P/P1P2PP1/RBBNKNQR w HAha - 0 9
+epd rbbnknqr/pppp3p/5pp1/8/1P1pP3/7P/P1P2PP1/RBBNKNQR w HAha -
 perft 1 29
 perft 2 756
 perft 3 21616
@@ -4934,7 +4934,7 @@ perft 5 17602252
 perft 6 528140595
 
 id 548
-epd 1nbbknqr/rpp1ppp1/1Q1p3p/p7/2P2PP1/8/PP1PP2P/RNBBKN1R w HAh - 2 9
+epd 1nbbknqr/rpp1ppp1/1Q1p3p/p7/2P2PP1/8/PP1PP2P/RNBBKN1R w HAh -
 perft 1 37
 perft 2 977
 perft 3 34977
@@ -4943,7 +4943,7 @@ perft 5 33695089
 perft 6 940198007
 
 id 549
-epd rnb2bqr/ppkpppp1/3n3p/2p5/6PP/2N2P2/PPPPP3/R1BKNBQR w HA - 2 9
+epd rnb2bqr/ppkpppp1/3n3p/2p5/6PP/2N2P2/PPPPP3/R1BKNBQR w HA -
 perft 1 30
 perft 2 647
 perft 3 20365
@@ -4952,7 +4952,7 @@ perft 5 15115531
 perft 6 369257622
 
 id 550
-epd rn1k1qrb/p1pppppp/bp6/8/4n3/P4BPP/1PPPPP2/RNBKNQR1 w GAga - 2 9
+epd rn1k1qrb/p1pppppp/bp6/8/4n3/P4BPP/1PPPPP2/RNBKNQR1 w GAga -
 perft 1 22
 perft 2 670
 perft 3 14998
@@ -4961,7 +4961,7 @@ perft 5 11199653
 perft 6 339919682
 
 id 551
-epd rb2bnqr/nppkpppp/3p4/p7/1P6/P2N2P1/2PPPP1P/RB1KBNQR w HA - 3 9
+epd rb2bnqr/nppkpppp/3p4/p7/1P6/P2N2P1/2PPPP1P/RB1KBNQR w HA -
 perft 1 22
 perft 2 479
 perft 3 11475
@@ -4970,7 +4970,7 @@ perft 5 6831555
 perft 6 167329117
 
 id 552
-epd r1kbb1qr/2pppppp/np2n3/p7/2P3P1/8/PP1PPPQP/RNKBBN1R w HAha - 1 9
+epd r1kbb1qr/2pppppp/np2n3/p7/2P3P1/8/PP1PPPQP/RNKBBN1R w HAha -
 perft 1 32
 perft 2 723
 perft 3 23953
@@ -4979,7 +4979,7 @@ perft 5 19472074
 perft 6 504622114
 
 id 553
-epd rnknbb1r/p1ppp1pp/8/1p1P1p1q/8/P1P5/1P2PPPP/RNKNBBQR w HAha - 1 9
+epd rnknbb1r/p1ppp1pp/8/1p1P1p1q/8/P1P5/1P2PPPP/RNKNBBQR w HAha -
 perft 1 19
 perft 2 607
 perft 3 12733
@@ -4988,7 +4988,7 @@ perft 5 9753617
 perft 6 325177085
 
 id 554
-epd rnkn1qrb/pp1bp1pp/2p5/1N1p1p2/8/2P5/PPKPPPPP/R2NBQRB w ga - 2 9
+epd rnkn1qrb/pp1bp1pp/2p5/1N1p1p2/8/2P5/PPKPPPPP/R2NBQRB w ga -
 perft 1 27
 perft 2 533
 perft 3 14549
@@ -4997,7 +4997,7 @@ perft 5 9206957
 perft 6 232664675
 
 id 555
-epd r1nknqbr/pp2p1pp/2p2p2/3p4/6P1/PP1P4/2P1PP1b/RBNKNQBR w HAha - 0 9
+epd r1nknqbr/pp2p1pp/2p2p2/3p4/6P1/PP1P4/2P1PP1b/RBNKNQBR w HAha -
 perft 1 20
 perft 2 582
 perft 3 13777
@@ -5006,7 +5006,7 @@ perft 5 10708639
 perft 6 326565393
 
 id 556
-epd rnkb1qbr/p1pp1p1p/1p2pn2/1Q4p1/4P3/N4P2/PPPP2PP/R1KBN1BR w HAha - 0 9
+epd rnkb1qbr/p1pp1p1p/1p2pn2/1Q4p1/4P3/N4P2/PPPP2PP/R1KBN1BR w HAha -
 perft 1 40
 perft 2 1038
 perft 3 39356
@@ -5015,7 +5015,7 @@ perft 5 39145902
 perft 6 1079612614
 
 id 557
-epd rn2qbbr/1pkppp1p/p3n1p1/8/8/2P2P2/PP1PP1PP/RNKN1BBR w HA - 0 9
+epd rn2qbbr/1pkppp1p/p3n1p1/8/8/2P2P2/PP1PP1PP/RNKN1BBR w HA -
 perft 1 24
 perft 2 605
 perft 3 14888
@@ -5024,7 +5024,7 @@ perft 5 9687507
 perft 6 260874068
 
 id 558
-epd rn1nqrbb/p1kppp1p/8/1pp3p1/1P6/2N1P3/P1PP1PPP/RK1NQRBB w - - 0 9
+epd rn1nqrbb/p1kppp1p/8/1pp3p1/1P6/2N1P3/P1PP1PPP/RK1NQRBB w - -
 perft 1 21
 perft 2 540
 perft 3 12489
@@ -5033,7 +5033,7 @@ perft 5 8436136
 perft 6 237525904
 
 id 559
-epd bbrnknrq/1pp3pp/p2p1p2/4p3/P7/1P2N3/2PPPPPP/BBRN1RKQ w gc - 0 9
+epd bbrnknrq/1pp3pp/p2p1p2/4p3/P7/1P2N3/2PPPPPP/BBRN1RKQ w gc -
 perft 1 24
 perft 2 527
 perft 3 13900
@@ -5042,7 +5042,7 @@ perft 5 9139962
 perft 6 226253685
 
 id 560
-epd brnb1nrq/pppp1kpp/4p3/8/5p1P/P1P3P1/1P1PPP2/BRNBKNRQ w GB - 1 9
+epd brnb1nrq/pppp1kpp/4p3/8/5p1P/P1P3P1/1P1PPP2/BRNBKNRQ w GB -
 perft 1 29
 perft 2 773
 perft 3 23904
@@ -5051,7 +5051,7 @@ perft 5 20503775
 perft 6 560338709
 
 id 561
-epd br1k1brq/ppppp2p/1n1n1pp1/8/P1P5/3P2P1/1P2PP1P/BRNKNBRQ w GBgb - 0 9
+epd br1k1brq/ppppp2p/1n1n1pp1/8/P1P5/3P2P1/1P2PP1P/BRNKNBRQ w GBgb -
 perft 1 28
 perft 2 811
 perft 3 23550
@@ -5060,7 +5060,7 @@ perft 5 19913758
 perft 6 565143976
 
 id 562
-epd 1r1knrqb/n1pppppp/p1b5/1p6/8/3N1P2/PPPPP1PP/BRNK1RQB w fb - 3 9
+epd 1r1knrqb/n1pppppp/p1b5/1p6/8/3N1P2/PPPPP1PP/BRNK1RQB w fb -
 perft 1 29
 perft 2 753
 perft 3 23210
@@ -5069,7 +5069,7 @@ perft 5 20044474
 perft 6 558383603
 
 id 563
-epd rbbnk1rq/pppppppp/8/3Pn3/8/4P1P1/PPP2P1P/RBBNKNRQ w GAga - 1 9
+epd rbbnk1rq/pppppppp/8/3Pn3/8/4P1P1/PPP2P1P/RBBNKNRQ w GAga -
 perft 1 22
 perft 2 551
 perft 3 12619
@@ -5078,7 +5078,7 @@ perft 5 8204171
 perft 6 217689974
 
 id 564
-epd rnbbk1rq/2pppp1p/p3n1p1/1p6/P3N3/8/1PPPPPPP/RNBB1KRQ w ga - 0 9
+epd rnbbk1rq/2pppp1p/p3n1p1/1p6/P3N3/8/1PPPPPPP/RNBB1KRQ w ga -
 perft 1 26
 perft 2 742
 perft 3 20061
@@ -5087,7 +5087,7 @@ perft 5 16787080
 perft 6 525678162
 
 id 565
-epd rnbkn1rq/ppppppb1/6p1/7p/2B2P2/1P2P3/P1PP2PP/RNBKN1RQ w GAga - 1 9
+epd rnbkn1rq/ppppppb1/6p1/7p/2B2P2/1P2P3/P1PP2PP/RNBKN1RQ w GAga -
 perft 1 28
 perft 2 799
 perft 3 23210
@@ -5096,7 +5096,7 @@ perft 5 20755098
 perft 6 639632905
 
 id 566
-epd rn1knrqb/p2pppp1/b1p5/1p5p/2P2P2/1P6/P2PP1PP/RNBKNRQB w FAfa - 1 9
+epd rn1knrqb/p2pppp1/b1p5/1p5p/2P2P2/1P6/P2PP1PP/RNBKNRQB w FAfa -
 perft 1 30
 perft 2 579
 perft 3 18481
@@ -5105,7 +5105,7 @@ perft 5 13257198
 perft 6 311282465
 
 id 567
-epd rbnkbnrq/pp2p1Np/2p2p2/8/3p4/8/PPPPPPPP/RBNKBR1Q w Aga - 0 9
+epd rbnkbnrq/pp2p1Np/2p2p2/8/3p4/8/PPPPPPPP/RBNKBR1Q w Aga -
 perft 1 23
 perft 2 670
 perft 3 16435
@@ -5114,7 +5114,7 @@ perft 5 13012378
 perft 6 411860744
 
 id 568
-epd rk1bbnrq/ppp1pppp/n7/3p4/5P2/3P2NP/PPP1P1P1/RNKBB1RQ w GA - 0 9
+epd rk1bbnrq/ppp1pppp/n7/3p4/5P2/3P2NP/PPP1P1P1/RNKBB1RQ w GA -
 perft 1 26
 perft 2 597
 perft 3 16238
@@ -5123,7 +5123,7 @@ perft 5 11269462
 perft 6 296701249
 
 id 569
-epd r1knbbrq/pppp2p1/2n1p2p/5p2/4P3/P1PP4/1P3PPP/RNKNBBRQ w GAga - 1 9
+epd r1knbbrq/pppp2p1/2n1p2p/5p2/4P3/P1PP4/1P3PPP/RNKNBBRQ w GAga -
 perft 1 20
 perft 2 596
 perft 3 13091
@@ -5132,7 +5132,7 @@ perft 5 9416862
 perft 6 293659781
 
 id 570
-epd rnknbrqb/p1p1pp1p/3p4/1p1N2p1/8/N7/PPPPPPPP/1RK1BRQB w Ffa - 0 9
+epd rnknbrqb/p1p1pp1p/3p4/1p1N2p1/8/N7/PPPPPPPP/1RK1BRQB w Ffa -
 perft 1 26
 perft 2 724
 perft 3 18942
@@ -5141,7 +5141,7 @@ perft 5 15257204
 perft 6 461293885
 
 id 571
-epd rbnknrb1/1p1ppp1p/p1p3p1/8/1P3P2/1R6/PqPPP1PP/RBNKN1BQ w Afa - 0 9
+epd rbnknrb1/1p1ppp1p/p1p3p1/8/1P3P2/1R6/PqPPP1PP/RBNKN1BQ w Afa -
 perft 1 31
 perft 2 1183
 perft 3 34723
@@ -5150,7 +5150,7 @@ perft 5 38722152
 perft 6 1421492227
 
 id 572
-epd rnkbnrbq/2p1ppp1/p7/1p1p3p/3P4/1P4P1/P1P1PP1P/RNKBNRBQ w FAfa - 0 9
+epd rnkbnrbq/2p1ppp1/p7/1p1p3p/3P4/1P4P1/P1P1PP1P/RNKBNRBQ w FAfa -
 perft 1 24
 perft 2 506
 perft 3 12748
@@ -5159,7 +5159,7 @@ perft 5 8086100
 perft 6 207129256
 
 id 573
-epd r1knrbbq/pp1ppppp/2p1n3/8/2P3P1/P7/1PKPPP1P/RN1NRBBQ w ea - 0 9
+epd r1knrbbq/pp1ppppp/2p1n3/8/2P3P1/P7/1PKPPP1P/RN1NRBBQ w ea -
 perft 1 28
 perft 2 570
 perft 3 16037
@@ -5168,7 +5168,7 @@ perft 5 10278695
 perft 6 242592363
 
 id 574
-epd rnknrq1b/ppp1p1p1/4b3/3p1p1p/6P1/P4P2/1PPPPQ1P/RNKNR1BB w EAea - 2 9
+epd rnknrq1b/ppp1p1p1/4b3/3p1p1p/6P1/P4P2/1PPPPQ1P/RNKNR1BB w EAea -
 perft 1 30
 perft 2 739
 perft 3 23124
@@ -5177,7 +5177,7 @@ perft 5 19252739
 perft 6 521629794
 
 id 575
-epd bbqr1krn/pppp1p1p/5n2/4p1p1/3P4/P3QP2/1PP1P1PP/BB1RNKRN w GDgd - 0 9
+epd bbqr1krn/pppp1p1p/5n2/4p1p1/3P4/P3QP2/1PP1P1PP/BB1RNKRN w GDgd -
 perft 1 31
 perft 2 799
 perft 3 25627
@@ -5186,7 +5186,7 @@ perft 5 22172123
 perft 6 609277274
 
 id 576
-epd bq1b1krn/pp1ppppp/3n4/2r5/3p3N/6N1/PPP1PPPP/BQRB1KR1 w GCg - 2 9
+epd bq1b1krn/pp1ppppp/3n4/2r5/3p3N/6N1/PPP1PPPP/BQRB1KR1 w GCg -
 perft 1 21
 perft 2 798
 perft 3 18571
@@ -5195,7 +5195,7 @@ perft 5 17546069
 perft 6 647165916
 
 id 577
-epd bqrnkbrn/2pp1pp1/p7/1p2p2p/1P6/4N3/P1PPPPPP/BQR1KBRN w GCgc - 0 9
+epd bqrnkbrn/2pp1pp1/p7/1p2p2p/1P6/4N3/P1PPPPPP/BQR1KBRN w GCgc -
 perft 1 27
 perft 2 783
 perft 3 22327
@@ -5204,7 +5204,7 @@ perft 5 20059741
 perft 6 624462073
 
 id 578
-epd bqr1krnb/1np1pppp/8/pp1p4/8/2P2N2/PP1PPPPP/BQRNKR1B w FCfc - 0 9
+epd bqr1krnb/1np1pppp/8/pp1p4/8/2P2N2/PP1PPPPP/BQRNKR1B w FCfc -
 perft 1 28
 perft 2 636
 perft 3 18874
@@ -5213,7 +5213,7 @@ perft 5 14237097
 perft 6 372181570
 
 id 579
-epd qbb1rkrn/1ppppppp/p7/7n/8/P2P4/1PP1PPPP/QBBRNKRN w Gg - 0 9
+epd qbb1rkrn/1ppppppp/p7/7n/8/P2P4/1PP1PPPP/QBBRNKRN w Gg -
 perft 1 25
 perft 2 547
 perft 3 13837
@@ -5222,7 +5222,7 @@ perft 5 8849383
 perft 6 229112926
 
 id 580
-epd 1rbbnkrn/p1p1pp1p/2q5/1p1p2p1/8/2P3P1/PP1PPP1P/QRBBNKRN w GBgb - 2 9
+epd 1rbbnkrn/p1p1pp1p/2q5/1p1p2p1/8/2P3P1/PP1PPP1P/QRBBNKRN w GBgb -
 perft 1 24
 perft 2 1010
 perft 3 24370
@@ -5231,7 +5231,7 @@ perft 5 24328258
 perft 6 961371180
 
 id 581
-epd qrb1kbrn/ppp1p2p/4npp1/3p4/8/1PP4P/PR1PPPP1/Q1BNKBRN w Ggb - 1 9
+epd qrb1kbrn/ppp1p2p/4npp1/3p4/8/1PP4P/PR1PPPP1/Q1BNKBRN w Ggb -
 perft 1 18
 perft 2 451
 perft 3 9291
@@ -5240,7 +5240,7 @@ perft 5 5568106
 perft 6 155744022
 
 id 582
-epd qr2krnb/p1p1pppp/b1np4/1p6/3NP3/7P/PPPP1PP1/QRBNKR1B w FBfb - 2 9
+epd qr2krnb/p1p1pppp/b1np4/1p6/3NP3/7P/PPPP1PP1/QRBNKR1B w FBfb -
 perft 1 25
 perft 2 667
 perft 3 17081
@@ -5249,7 +5249,7 @@ perft 5 12458875
 perft 6 361495148
 
 id 583
-epd qbrnbkrn/ppp3pp/3p4/5p2/2P1pP2/6PP/PP1PP3/QBRNBKRN w GCgc - 0 9
+epd qbrnbkrn/ppp3pp/3p4/5p2/2P1pP2/6PP/PP1PP3/QBRNBKRN w GCgc -
 perft 1 24
 perft 2 650
 perft 3 16835
@@ -5258,7 +5258,7 @@ perft 5 12187382
 perft 6 326834539
 
 id 584
-epd qrnb1krn/ppp1p1pp/5p2/2Np4/b2P4/2P5/PP2PPPP/QR1BBKRN w GBgb - 0 9
+epd qrnb1krn/ppp1p1pp/5p2/2Np4/b2P4/2P5/PP2PPPP/QR1BBKRN w GBgb -
 perft 1 27
 perft 2 641
 perft 3 17490
@@ -5267,7 +5267,7 @@ perft 5 12103076
 perft 6 310695797
 
 id 585
-epd qrnkbbrn/pp2pp2/8/2pp2pp/6PP/3P4/PPPKPP2/QRN1BBRN w gb - 0 9
+epd qrnkbbrn/pp2pp2/8/2pp2pp/6PP/3P4/PPPKPP2/QRN1BBRN w gb -
 perft 1 22
 perft 2 554
 perft 3 13116
@@ -5276,7 +5276,7 @@ perft 5 9014737
 perft 6 258925091
 
 id 586
-epd qrnkbrnb/p1p1ppp1/1p6/3p4/3P3p/5N1P/PPP1PPP1/QRNKBR1B w FBfb - 0 9
+epd qrnkbrnb/p1p1ppp1/1p6/3p4/3P3p/5N1P/PPP1PPP1/QRNKBR1B w FBfb -
 perft 1 24
 perft 2 529
 perft 3 13205
@@ -5285,7 +5285,7 @@ perft 5 8295874
 perft 6 213856651
 
 id 587
-epd qbr1krbn/1pppp1pp/p7/5pn1/2PP4/8/PPB1PPPP/Q1RNKRBN w FCfc - 0 9
+epd qbr1krbn/1pppp1pp/p7/5pn1/2PP4/8/PPB1PPPP/Q1RNKRBN w FCfc -
 perft 1 26
 perft 2 831
 perft 3 21651
@@ -5294,7 +5294,7 @@ perft 5 18961456
 perft 6 621884383
 
 id 588
-epd 1rnbkrbn/1qp1pppp/3p4/pp6/4P3/1NP4P/PP1P1PP1/QR1BKRBN w FBfb - 0 9
+epd 1rnbkrbn/1qp1pppp/3p4/pp6/4P3/1NP4P/PP1P1PP1/QR1BKRBN w FBfb -
 perft 1 24
 perft 2 597
 perft 3 15089
@@ -5303,7 +5303,7 @@ perft 5 10832084
 perft 6 307793179
 
 id 589
-epd q1rkrbbn/ppp1pppp/8/3p4/1PnP4/P7/1RP1PPPP/Q1NKRBBN w Ee - 1 9
+epd q1rkrbbn/ppp1pppp/8/3p4/1PnP4/P7/1RP1PPPP/Q1NKRBBN w Ee -
 perft 1 20
 perft 2 520
 perft 3 10769
@@ -5312,7 +5312,7 @@ perft 5 6452205
 perft 6 170268300
 
 id 590
-epd qrnkrn1b/ppppp1pp/4b3/7P/6p1/P7/1PPPPP2/QRNKRNBB w EBeb - 0 9
+epd qrnkrn1b/ppppp1pp/4b3/7P/6p1/P7/1PPPPP2/QRNKRNBB w EBeb -
 perft 1 26
 perft 2 566
 perft 3 15623
@@ -5321,7 +5321,7 @@ perft 5 10940750
 perft 6 287987207
 
 id 591
-epd bbr1nkrn/ppp1pppp/3q4/3p4/8/P7/1PPPPPPP/BBRQNRKN w gc - 5 9
+epd bbr1nkrn/ppp1pppp/3q4/3p4/8/P7/1PPPPPPP/BBRQNRKN w gc -
 perft 1 19
 perft 2 661
 perft 3 13895
@@ -5330,7 +5330,7 @@ perft 5 10870247
 perft 6 356399665
 
 id 592
-epd brqbnkrn/pp1pp2p/5pp1/2p5/4P3/P2P1N2/1PP2PPP/BRQB1KRN w GBgb - 0 9
+epd brqbnkrn/pp1pp2p/5pp1/2p5/4P3/P2P1N2/1PP2PPP/BRQB1KRN w GBgb -
 perft 1 27
 perft 2 679
 perft 3 19916
@@ -5339,7 +5339,7 @@ perft 5 16391730
 perft 6 455940859
 
 id 593
-epd 2qnkbrn/p1pppppp/8/1r6/1p2bP2/7N/PPPPP1PP/BR1QKBRN w GBg - 4 9
+epd 2qnkbrn/p1pppppp/8/1r6/1p2bP2/7N/PPPPP1PP/BR1QKBRN w GBg -
 perft 1 18
 perft 2 774
 perft 3 15713
@@ -5348,7 +5348,7 @@ perft 5 14371755
 perft 6 559579332
 
 id 594
-epd r1qnkr1b/p1pppppp/7n/1p6/8/1P3b1N/PRPPPPPP/B1QNK1RB w f - 5 9
+epd r1qnkr1b/p1pppppp/7n/1p6/8/1P3b1N/PRPPPPPP/B1QNK1RB w f -
 perft 1 21
 perft 2 677
 perft 3 15437
@@ -5357,7 +5357,7 @@ perft 5 12463801
 perft 6 410795298
 
 id 595
-epd rbbqn1rn/pppp1pp1/3k4/4p2Q/2PPP3/8/PP3PPP/RBB1NKRN w GA - 1 9
+epd rbbqn1rn/pppp1pp1/3k4/4p2Q/2PPP3/8/PP3PPP/RBB1NKRN w GA -
 perft 1 40
 perft 2 742
 perft 3 28757
@@ -5366,7 +5366,7 @@ perft 5 21852196
 perft 6 471452088
 
 id 596
-epd rqbbnkrn/3pppp1/p1p4p/1p6/5P2/P2N4/1PPPP1PP/RQBBK1RN w ga - 0 9
+epd rqbbnkrn/3pppp1/p1p4p/1p6/5P2/P2N4/1PPPP1PP/RQBBK1RN w ga -
 perft 1 23
 perft 2 665
 perft 3 16400
@@ -5375,7 +5375,7 @@ perft 5 12794736
 perft 6 396640086
 
 id 597
-epd r2nkbrn/pp2pppp/8/2ppqb2/2P3P1/5P2/PP1PPN1P/RQB1KBRN w GAga - 3 9
+epd r2nkbrn/pp2pppp/8/2ppqb2/2P3P1/5P2/PP1PPN1P/RQB1KBRN w GAga -
 perft 1 28
 perft 2 1108
 perft 3 31164
@@ -5384,7 +5384,7 @@ perft 5 34780853
 perft 6 1292405738
 
 id 598
-epd rqbnk1nb/p1pppr1p/5p2/1p4p1/1PP1P3/8/P2P1PPP/RQBNKRNB w FAa - 1 9
+epd rqbnk1nb/p1pppr1p/5p2/1p4p1/1PP1P3/8/P2P1PPP/RQBNKRNB w FAa -
 perft 1 26
 perft 2 650
 perft 3 18208
@@ -5393,7 +5393,7 @@ perft 5 14565370
 perft 6 416833400
 
 id 599
-epd rbqnb1rn/p1pp1kpp/1p2pp2/8/4P2P/P5P1/1PPP1P2/RBQNBKRN w GA - 0 9
+epd rbqnb1rn/p1pp1kpp/1p2pp2/8/4P2P/P5P1/1PPP1P2/RBQNBKRN w GA -
 perft 1 20
 perft 2 437
 perft 3 9423
@@ -5402,7 +5402,7 @@ perft 5 5282124
 perft 6 132309824
 
 id 600
-epd rqnbbkrn/p1p1pppp/3p4/1p5B/8/1P1NP3/P1PP1PPP/RQ2BKRN w GAga - 0 9
+epd rqnbbkrn/p1p1pppp/3p4/1p5B/8/1P1NP3/P1PP1PPP/RQ2BKRN w GAga -
 perft 1 30
 perft 2 606
 perft 3 18382
@@ -5411,7 +5411,7 @@ perft 5 12989786
 perft 6 326601372
 
 id 601
-epd rqnkbbr1/ppppp1pp/5p2/7n/8/2PNP2P/PP1P1PP1/RQ1KBBRN w GAga - 1 9
+epd rqnkbbr1/ppppp1pp/5p2/7n/8/2PNP2P/PP1P1PP1/RQ1KBBRN w GAga -
 perft 1 23
 perft 2 482
 perft 3 12506
@@ -5420,7 +5420,7 @@ perft 5 8430874
 perft 6 217797292
 
 id 602
-epd r1nkbrnb/2ppppp1/1q6/pp5p/1P6/P3P3/2PPKPPP/RQN1BRNB w fa - 2 9
+epd r1nkbrnb/2ppppp1/1q6/pp5p/1P6/P3P3/2PPKPPP/RQN1BRNB w fa -
 perft 1 25
 perft 2 827
 perft 3 21518
@@ -5429,7 +5429,7 @@ perft 5 19290675
 perft 6 632892337
 
 id 603
-epd rbqnkrbn/p1ppppp1/7p/1p6/7P/2N1P3/PPPP1PPB/RBQ1KR1N w FAfa - 1 9
+epd rbqnkrbn/p1ppppp1/7p/1p6/7P/2N1P3/PPPP1PPB/RBQ1KR1N w FAfa -
 perft 1 30
 perft 2 627
 perft 3 18566
@@ -5438,7 +5438,7 @@ perft 5 12976682
 perft 6 337377291
 
 id 604
-epd r1nbkrbn/p1qp1ppp/8/1pp1p3/2P1P3/6P1/PP1PBP1P/RQN1KRBN w FAfa - 2 9
+epd r1nbkrbn/p1qp1ppp/8/1pp1p3/2P1P3/6P1/PP1PBP1P/RQN1KRBN w FAfa -
 perft 1 22
 perft 2 616
 perft 3 14503
@@ -5447,7 +5447,7 @@ perft 5 10850952
 perft 6 335943324
 
 id 605
-epd rqnkr1bn/ppp1ppb1/3p2pp/8/P7/2P2P2/1PKPP1PP/RQN1RBBN w ea - 1 9
+epd rqnkr1bn/ppp1ppb1/3p2pp/8/P7/2P2P2/1PKPP1PP/RQN1RBBN w ea -
 perft 1 31
 perft 2 679
 perft 3 21365
@@ -5456,7 +5456,7 @@ perft 5 15661072
 perft 6 379844460
 
 id 606
-epd r2krnbb/qppp1ppp/1n6/p3p3/PP6/4N3/N1PPPPPP/RQ1KR1BB w EAea - 4 9
+epd r2krnbb/qppp1ppp/1n6/p3p3/PP6/4N3/N1PPPPPP/RQ1KR1BB w EAea -
 perft 1 24
 perft 2 645
 perft 3 17054
@@ -5465,7 +5465,7 @@ perft 5 13837270
 perft 6 416239106
 
 id 607
-epd bbr1qk1n/1ppppp1p/2n5/p7/P7/1P2P3/2PP1PrP/1BRNQKRN w GCc - 0 9
+epd bbr1qk1n/1ppppp1p/2n5/p7/P7/1P2P3/2PP1PrP/1BRNQKRN w GCc -
 perft 1 18
 perft 2 520
 perft 3 10680
@@ -5474,7 +5474,7 @@ perft 5 7215306
 perft 6 207612575
 
 id 608
-epd brnbq1rn/2ppppkp/p5p1/1p6/8/1BP3P1/PP1PPP1P/BRN1QRKN w - - 0 9
+epd brnbq1rn/2ppppkp/p5p1/1p6/8/1BP3P1/PP1PPP1P/BRN1QRKN w - -
 perft 1 21
 perft 2 625
 perft 3 13989
@@ -5483,7 +5483,7 @@ perft 5 9929336
 perft 6 300902534
 
 id 609
-epd brn1kbrn/pp2p1pp/3p4/q1p2p2/2P4P/6P1/PP1PPP2/BRNQKBRN w GBgb - 1 9
+epd brn1kbrn/pp2p1pp/3p4/q1p2p2/2P4P/6P1/PP1PPP2/BRNQKBRN w GBgb -
 perft 1 18
 perft 2 477
 perft 3 10205
@@ -5492,7 +5492,7 @@ perft 5 6720181
 perft 6 187205941
 
 id 610
-epd brn1krnb/p3pppp/1qpp4/1p6/2P3P1/1P6/P2PPP1P/BRNQKRNB w FBfb - 1 9
+epd brn1krnb/p3pppp/1qpp4/1p6/2P3P1/1P6/P2PPP1P/BRNQKRNB w FBfb -
 perft 1 30
 perft 2 835
 perft 3 24761
@@ -5501,7 +5501,7 @@ perft 5 21806428
 perft 6 654487872
 
 id 611
-epd r1b1qkrn/1p1ppppp/p1p1n3/8/4P3/1PN5/P1PPQPPb/RBB2KRN w GAga - 0 9
+epd r1b1qkrn/1p1ppppp/p1p1n3/8/4P3/1PN5/P1PPQPPb/RBB2KRN w GAga -
 perft 1 28
 perft 2 825
 perft 3 24536
@@ -5510,7 +5510,7 @@ perft 5 22079005
 perft 6 647939781
 
 id 612
-epd r1bbqk1n/p1pppprp/n7/1p4p1/5P2/2N3N1/PPPPP1PP/1RBBQKR1 w Ga - 4 9
+epd r1bbqk1n/p1pppprp/n7/1p4p1/5P2/2N3N1/PPPPP1PP/1RBBQKR1 w Ga -
 perft 1 25
 perft 2 545
 perft 3 14657
@@ -5519,7 +5519,7 @@ perft 5 10271111
 perft 6 273864588
 
 id 613
-epd rnbqkbrn/p1pp1pp1/4p3/7p/2p4P/2P5/PP1PPPP1/R1BQKBRN w GAga - 0 9
+epd rnbqkbrn/p1pp1pp1/4p3/7p/2p4P/2P5/PP1PPPP1/R1BQKBRN w GAga -
 perft 1 17
 perft 2 445
 perft 3 9076
@@ -5528,7 +5528,7 @@ perft 5 5918310
 perft 6 174733195
 
 id 614
-epd rnbqkrnb/1p1pp1p1/2p4p/p4p2/3P2P1/7N/PPPBPP1P/RN1QKR1B w FAfa - 0 9
+epd rnbqkrnb/1p1pp1p1/2p4p/p4p2/3P2P1/7N/PPPBPP1P/RN1QKR1B w FAfa -
 perft 1 34
 perft 2 746
 perft 3 25319
@@ -5537,7 +5537,7 @@ perft 5 21285553
 perft 6 569141201
 
 id 615
-epd rbnqbkr1/1ppppp2/p5n1/6pp/4P3/1N6/PPPP1PPP/RBQ1BRKN w ga - 2 9
+epd rbnqbkr1/1ppppp2/p5n1/6pp/4P3/1N6/PPPP1PPP/RBQ1BRKN w ga -
 perft 1 18
 perft 2 466
 perft 3 9683
@@ -5546,7 +5546,7 @@ perft 5 6051500
 perft 6 170135726
 
 id 616
-epd rnqb1krn/ppppp1p1/7p/7b/P1P2pPP/8/1P1PPP2/RNQBBKRN w GAga - 0 9
+epd rnqb1krn/ppppp1p1/7p/7b/P1P2pPP/8/1P1PPP2/RNQBBKRN w GAga -
 perft 1 24
 perft 2 575
 perft 3 15400
@@ -5555,7 +5555,7 @@ perft 5 11039042
 perft 6 291243811
 
 id 617
-epd rnqkbbr1/p1pp1ppp/4p3/1p6/P3P2n/5P2/1PPP1NPP/RNQKBBR1 w GAga - 2 9
+epd rnqkbbr1/p1pp1ppp/4p3/1p6/P3P2n/5P2/1PPP1NPP/RNQKBBR1 w GAga -
 perft 1 27
 perft 2 803
 perft 3 22883
@@ -5564,7 +5564,7 @@ perft 5 20666099
 perft 6 638696065
 
 id 618
-epd rn1kbrnb/1qppp1pp/1p6/p4p2/1B1P4/1P5N/P1P1PPPP/RNQK1R1B w FAfa - 0 9
+epd rn1kbrnb/1qppp1pp/1p6/p4p2/1B1P4/1P5N/P1P1PPPP/RNQK1R1B w FAfa -
 perft 1 37
 perft 2 1209
 perft 3 43015
@@ -5573,7 +5573,7 @@ perft 5 49748034
 perft 6 1671593862
 
 id 619
-epd rbnqkrbn/Bppp1p2/p5pp/4p3/5P2/6PP/PPPPP3/RBNQKR1N w FAfa - 0 9
+epd rbnqkrbn/Bppp1p2/p5pp/4p3/5P2/6PP/PPPPP3/RBNQKR1N w FAfa -
 perft 1 29
 perft 2 720
 perft 3 20434
@@ -5582,7 +5582,7 @@ perft 5 15384362
 perft 6 421343249
 
 id 620
-epd rnqbkr1n/1p1ppbpp/3p1p2/p7/8/1P6/P1PPPPPP/R1QBKRBN w FAfa - 0 9
+epd rnqbkr1n/1p1ppbpp/3p1p2/p7/8/1P6/P1PPPPPP/R1QBKRBN w FAfa -
 perft 1 20
 perft 2 657
 perft 3 14424
@@ -5591,7 +5591,7 @@ perft 5 11843134
 perft 6 413965054
 
 id 621
-epd rnqkrb1n/ppppp3/6p1/5p1p/2b2P2/P1N5/1PPPP1PP/RQ1KRBBN w EAea - 1 9
+epd rnqkrb1n/ppppp3/6p1/5p1p/2b2P2/P1N5/1PPPP1PP/RQ1KRBBN w EAea -
 perft 1 28
 perft 2 749
 perft 3 20684
@@ -5600,7 +5600,7 @@ perft 5 15379233
 perft 6 417191461
 
 id 622
-epd rnqk1nbb/1pp2ppp/3pr3/p3p3/3P1P2/2N3N1/PPP1P1PP/R1QKR1BB w EAa - 1 9
+epd rnqk1nbb/1pp2ppp/3pr3/p3p3/3P1P2/2N3N1/PPP1P1PP/R1QKR1BB w EAa -
 perft 1 29
 perft 2 883
 perft 3 26412
@@ -5609,7 +5609,7 @@ perft 5 25144295
 perft 6 789705382
 
 id 623
-epd bbr1kqrn/p1p1ppp1/1p2n2p/3p4/1P1P4/2N5/P1P1PPPP/BBR1KQRN w GCgc - 0 9
+epd bbr1kqrn/p1p1ppp1/1p2n2p/3p4/1P1P4/2N5/P1P1PPPP/BBR1KQRN w GCgc -
 perft 1 22
 perft 2 485
 perft 3 11475
@@ -5618,7 +5618,7 @@ perft 5 6825123
 perft 6 171793012
 
 id 624
-epd brnbkq1n/ppp1ppr1/7p/3p2p1/2P3PP/8/PPBPPP2/BRN1KQRN w GBb - 2 9
+epd brnbkq1n/ppp1ppr1/7p/3p2p1/2P3PP/8/PPBPPP2/BRN1KQRN w GBb -
 perft 1 30
 perft 2 634
 perft 3 19017
@@ -5627,7 +5627,7 @@ perft 5 13674310
 perft 6 345386924
 
 id 625
-epd brnkqbr1/1pppp1pp/5p2/p7/P1P1P2n/8/1P1P1PP1/BRNKQBRN w GBgb - 0 9
+epd brnkqbr1/1pppp1pp/5p2/p7/P1P1P2n/8/1P1P1PP1/BRNKQBRN w GBgb -
 perft 1 21
 perft 2 504
 perft 3 11672
@@ -5636,7 +5636,7 @@ perft 5 7778289
 perft 6 217596497
 
 id 626
-epd b1rkqrnb/p1ppp1pp/1p1n4/5p2/5P2/PN5P/1PPPP1P1/BR1KQRNB w FBf - 0 9
+epd b1rkqrnb/p1ppp1pp/1p1n4/5p2/5P2/PN5P/1PPPP1P1/BR1KQRNB w FBf -
 perft 1 23
 perft 2 688
 perft 3 17259
@@ -5645,7 +5645,7 @@ perft 5 14228372
 perft 6 451842354
 
 id 627
-epd 1bbnkqrn/rppppp2/p5p1/7p/7P/P1P1P3/1P1P1PP1/RBBNKQRN w GAg - 1 9
+epd 1bbnkqrn/rppppp2/p5p1/7p/7P/P1P1P3/1P1P1PP1/RBBNKQRN w GAg -
 perft 1 25
 perft 2 450
 perft 3 12391
@@ -5654,7 +5654,7 @@ perft 5 7752404
 perft 6 185393913
 
 id 628
-epd rnbbkqr1/1pppppp1/7p/p3n3/PP5P/8/1BPPPPP1/RN1BKQRN w GAga - 0 9
+epd rnbbkqr1/1pppppp1/7p/p3n3/PP5P/8/1BPPPPP1/RN1BKQRN w GAga -
 perft 1 23
 perft 2 543
 perft 3 12224
@@ -5663,7 +5663,7 @@ perft 5 7549008
 perft 6 199883770
 
 id 629
-epd r1bkqbrn/ppppp1pp/8/5p2/3nPP2/1P4N1/P1PP2PP/RNBKQBR1 w GAga - 1 9
+epd r1bkqbrn/ppppp1pp/8/5p2/3nPP2/1P4N1/P1PP2PP/RNBKQBR1 w GAga -
 perft 1 27
 perft 2 751
 perft 3 21158
@@ -5672,7 +5672,7 @@ perft 5 17989920
 perft 6 527273615
 
 id 630
-epd rnbkqr1b/1p1pp1pp/p4p1n/2p5/1P5P/N4P2/P1PPP1P1/R1BKQRNB w FAfa - 0 9
+epd rnbkqr1b/1p1pp1pp/p4p1n/2p5/1P5P/N4P2/P1PPP1P1/R1BKQRNB w FAfa -
 perft 1 21
 perft 2 498
 perft 3 11738
@@ -5681,7 +5681,7 @@ perft 5 7808375
 perft 6 216224115
 
 id 631
-epd rbnkbqrn/p1p3pp/1p1p4/B3pp2/3P2P1/6N1/PPP1PP1P/RBNK1QR1 w GAga - 0 9
+epd rbnkbqrn/p1p3pp/1p1p4/B3pp2/3P2P1/6N1/PPP1PP1P/RBNK1QR1 w GAga -
 perft 1 34
 perft 2 977
 perft 3 33464
@@ -5690,7 +5690,7 @@ perft 5 33318567
 perft 6 978991050
 
 id 632
-epd r1kbbqrn/ppp3pp/2np1p2/1P2p3/3P1P2/8/P1P1P1PP/RNKBBQRN w GAga - 0 9
+epd r1kbbqrn/ppp3pp/2np1p2/1P2p3/3P1P2/8/P1P1P1PP/RNKBBQRN w GAga -
 perft 1 32
 perft 2 920
 perft 3 28916
@@ -5699,7 +5699,7 @@ perft 5 26763259
 perft 6 797524786
 
 id 633
-epd rk1qbbrn/p2npppp/1p6/2p4Q/8/4P3/PPPP1PPP/RNK1B1RN w GA - 2 9
+epd rk1qbbrn/p2npppp/1p6/2p4Q/8/4P3/PPPP1PPP/RNK1B1RN w GA -
 perft 1 35
 perft 2 657
 perft 3 22359
@@ -5708,7 +5708,7 @@ perft 5 16662477
 perft 6 419496845
 
 id 634
-epd rnk1brnb/pp1p1pp1/8/q1p1p2p/5P2/NP6/P1PPP1PP/R1KQBRNB w FAfa - 1 9
+epd rnk1brnb/pp1p1pp1/8/q1p1p2p/5P2/NP6/P1PPP1PP/R1KQBRNB w FAfa -
 perft 1 26
 perft 2 774
 perft 3 20215
@@ -5717,7 +5717,7 @@ perft 5 16987110
 perft 6 523437649
 
 id 635
-epd rb1kqrbn/npp1ppp1/p7/3P3p/2PP4/8/PP3PPP/RBNKQRBN w FAfa - 0 9
+epd rb1kqrbn/npp1ppp1/p7/3P3p/2PP4/8/PP3PPP/RBNKQRBN w FAfa -
 perft 1 35
 perft 2 775
 perft 3 27395
@@ -5726,7 +5726,7 @@ perft 5 23983464
 perft 6 625669222
 
 id 636
-epd rnkb1rbn/pp1p2pp/8/2p1pp1q/P6P/1PN5/2PPPPP1/R1KBQRBN w FAfa - 1 9
+epd rnkb1rbn/pp1p2pp/8/2p1pp1q/P6P/1PN5/2PPPPP1/R1KBQRBN w FAfa -
 perft 1 22
 perft 2 899
 perft 3 21188
@@ -5735,7 +5735,7 @@ perft 5 21518343
 perft 6 857951339
 
 id 637
-epd rnkqrbbn/1pppp1p1/8/p2N1p1p/2P4P/8/PP1PPPP1/R1KQRBBN w EAea - 0 9
+epd rnkqrbbn/1pppp1p1/8/p2N1p1p/2P4P/8/PP1PPPP1/R1KQRBBN w EAea -
 perft 1 29
 perft 2 585
 perft 3 17571
@@ -5744,7 +5744,7 @@ perft 5 12238776
 perft 6 299752383
 
 id 638
-epd rnk1r1bb/pp1ppppp/1q4n1/2p5/5P1P/3PP3/PPP3P1/RNKQRNBB w EAea - 1 9
+epd rnk1r1bb/pp1ppppp/1q4n1/2p5/5P1P/3PP3/PPP3P1/RNKQRNBB w EAea -
 perft 1 27
 perft 2 884
 perft 3 24613
@@ -5753,7 +5753,7 @@ perft 5 23698701
 perft 6 790239502
 
 id 639
-epd bbrnkrqn/1ppp1p2/6pp/p3p3/5PP1/2PB4/PP1PP2P/B1RNKRQN w FCfc - 0 9
+epd bbrnkrqn/1ppp1p2/6pp/p3p3/5PP1/2PB4/PP1PP2P/B1RNKRQN w FCfc -
 perft 1 37
 perft 2 693
 perft 3 25425
@@ -5762,7 +5762,7 @@ perft 5 20138432
 perft 6 481498664
 
 id 640
-epd b1rbkrqn/ppp2ppp/1n2p3/3p4/6P1/2PP4/PP2PP1P/BRNBKRQN w FBf - 1 9
+epd b1rbkrqn/ppp2ppp/1n2p3/3p4/6P1/2PP4/PP2PP1P/BRNBKRQN w FBf -
 perft 1 21
 perft 2 463
 perft 3 10610
@@ -5771,7 +5771,7 @@ perft 5 6307276
 perft 6 159025909
 
 id 641
-epd brnkrb1n/1pp1p1pp/3p4/p1Nq1p2/2P5/8/PP1PPPPP/BRK1RBQN w eb - 2 9
+epd brnkrb1n/1pp1p1pp/3p4/p1Nq1p2/2P5/8/PP1PPPPP/BRK1RBQN w eb -
 perft 1 27
 perft 2 725
 perft 3 17842
@@ -5780,7 +5780,7 @@ perft 5 12604078
 perft 6 362747791
 
 id 642
-epd brn1r1nb/ppppkppp/4p3/8/2PP1P2/8/PP1KP1PP/BRN1RQNB w - - 1 9
+epd brn1r1nb/ppppkppp/4p3/8/2PP1P2/8/PP1KP1PP/BRN1RQNB w - -
 perft 1 25
 perft 2 623
 perft 3 16874
@@ -5789,7 +5789,7 @@ perft 5 12290985
 perft 6 317097424
 
 id 643
-epd rbb1krqn/1pp1pp1p/p3n1p1/3pP3/8/1PN5/P1PP1PPP/RBB1KRQN w FAfa d6 0 9
+epd rbb1krqn/1pp1pp1p/p3n1p1/3pP3/8/1PN5/P1PP1PPP/RBB1KRQN w FAfa d6
 perft 1 23
 perft 2 529
 perft 3 12641
@@ -5798,7 +5798,7 @@ perft 5 7861413
 perft 6 202594556
 
 id 644
-epd r1bbkrqn/p1pppppp/8/4n3/1p5P/P2P2P1/1PP1PP2/RNBBKRQN w FAfa - 0 9
+epd r1bbkrqn/p1pppppp/8/4n3/1p5P/P2P2P1/1PP1PP2/RNBBKRQN w FAfa -
 perft 1 23
 perft 2 571
 perft 3 13133
@@ -5807,7 +5807,7 @@ perft 5 8699448
 perft 6 243460643
 
 id 645
-epd rnbkrbqn/p1pp1ppp/4p3/1p6/8/BPN3P1/P1PPPP1P/R2KRBQN w EAea - 2 9
+epd rnbkrbqn/p1pp1ppp/4p3/1p6/8/BPN3P1/P1PPPP1P/R2KRBQN w EAea -
 perft 1 29
 perft 2 692
 perft 3 20014
@@ -5816,7 +5816,7 @@ perft 5 14904192
 perft 6 386694739
 
 id 646
-epd rnbkrqn1/pppppp2/8/1Q2b1pp/P3P3/5P2/1PPP2PP/RNBKR1NB w EAea - 0 9
+epd rnbkrqn1/pppppp2/8/1Q2b1pp/P3P3/5P2/1PPP2PP/RNBKR1NB w EAea -
 perft 1 37
 perft 2 1001
 perft 3 36440
@@ -5825,7 +5825,7 @@ perft 5 35626426
 perft 6 993747544
 
 id 647
-epd rbnkbrqn/p1pppp2/7p/1p4pP/3P1P2/8/PPP1P1P1/RBNKBRQN w FAfa - 0 9
+epd rbnkbrqn/p1pppp2/7p/1p4pP/3P1P2/8/PPP1P1P1/RBNKBRQN w FAfa -
 perft 1 30
 perft 2 564
 perft 3 17143
@@ -5834,7 +5834,7 @@ perft 5 11859538
 perft 6 293703269
 
 id 648
-epd 1nkbbrqn/3ppppp/r1p5/pp6/8/4PP2/PPPPN1PP/RNKBBRQ1 w FAf - 2 9
+epd 1nkbbrqn/3ppppp/r1p5/pp6/8/4PP2/PPPPN1PP/RNKBBRQ1 w FAf -
 perft 1 26
 perft 2 546
 perft 3 14641
@@ -5843,7 +5843,7 @@ perft 5 9556962
 perft 6 245137199
 
 id 649
-epd rnkrbbq1/pppppnp1/7p/8/1B1Q1p2/3P1P2/PPP1P1PP/RNKR1B1N w DAda - 2 9
+epd rnkrbbq1/pppppnp1/7p/8/1B1Q1p2/3P1P2/PPP1P1PP/RNKR1B1N w DAda -
 perft 1 43
 perft 2 887
 perft 3 36240
@@ -5852,7 +5852,7 @@ perft 5 33185346
 perft 6 851927292
 
 id 650
-epd 1rkrbqnb/pppppp2/2n3p1/7p/3P3P/P4N2/1PP1PPP1/RNKRBQ1B w DAd - 0 9
+epd 1rkrbqnb/pppppp2/2n3p1/7p/3P3P/P4N2/1PP1PPP1/RNKRBQ1B w DAd -
 perft 1 26
 perft 2 622
 perft 3 16049
@@ -5861,7 +5861,7 @@ perft 5 10786140
 perft 6 285233838
 
 id 651
-epd rbnkr1bn/pp1pqp1p/2p1p3/6p1/3P4/7P/PPP1PPP1/RBNKRQBN w EAea - 0 9
+epd rbnkr1bn/pp1pqp1p/2p1p3/6p1/3P4/7P/PPP1PPP1/RBNKRQBN w EAea -
 perft 1 19
 perft 2 566
 perft 3 12257
@@ -5870,7 +5870,7 @@ perft 5 9107175
 perft 6 293397389
 
 id 652
-epd r1kbrqb1/pppp2pp/2n1p1n1/5p1B/4PP2/P7/1PPP2PP/RNK1RQBN w EAea - 2 9
+epd r1kbrqb1/pppp2pp/2n1p1n1/5p1B/4PP2/P7/1PPP2PP/RNK1RQBN w EAea -
 perft 1 39
 perft 2 1359
 perft 3 53626
@@ -5879,7 +5879,7 @@ perft 5 73871486
 perft 6 2633945690
 
 id 653
-epd rnkrqbbn/p1p3pp/1p1ppp2/8/1P6/3P2P1/PKP1PP1P/RN1RQBBN w da - 0 9
+epd rnkrqbbn/p1p3pp/1p1ppp2/8/1P6/3P2P1/PKP1PP1P/RN1RQBBN w da -
 perft 1 26
 perft 2 776
 perft 3 20735
@@ -5888,7 +5888,7 @@ perft 5 16884013
 perft 6 503561996
 
 id 654
-epd rnkrqnbb/ppp2p1p/3p4/4p1p1/3P3P/N1Q5/PPP1PPP1/R1KR1NBB w DAda - 0 9
+epd rnkrqnbb/ppp2p1p/3p4/4p1p1/3P3P/N1Q5/PPP1PPP1/R1KR1NBB w DAda -
 perft 1 40
 perft 2 1175
 perft 3 45637
@@ -5897,7 +5897,7 @@ perft 5 52620163
 perft 6 1633655838
 
 id 655
-epd bbrnkrn1/p1pppp2/1p6/6pp/3q4/1P3QP1/P1PPPP1P/BBRNKRN1 w FCfc - 0 9
+epd bbrnkrn1/p1pppp2/1p6/6pp/3q4/1P3QP1/P1PPPP1P/BBRNKRN1 w FCfc -
 perft 1 34
 perft 2 1398
 perft 3 45749
@@ -5906,7 +5906,7 @@ perft 5 57268492
 perft 6 2059942014
 
 id 656
-epd br1bkrnq/1p2pppp/pnp5/3p4/P1P5/5P2/1P1PPKPP/BRNB1RNQ w fb - 2 9
+epd br1bkrnq/1p2pppp/pnp5/3p4/P1P5/5P2/1P1PPKPP/BRNB1RNQ w fb -
 perft 1 24
 perft 2 501
 perft 3 12237
@@ -5915,7 +5915,7 @@ perft 5 7049659
 perft 6 177940764
 
 id 657
-epd brnkrbn1/pppppp1q/B6p/6p1/8/1P2PP2/P1PP2PP/BRNKR1NQ w EBeb - 0 9
+epd brnkrbn1/pppppp1q/B6p/6p1/8/1P2PP2/P1PP2PP/BRNKR1NQ w EBeb -
 perft 1 34
 perft 2 815
 perft 3 25868
@@ -5924,7 +5924,7 @@ perft 5 22006883
 perft 6 639803952
 
 id 658
-epd br1krnqb/pppppp1p/1n4p1/8/8/P2NN3/2PPPPPP/BR1K1RQB w Beb - 2 9
+epd br1krnqb/pppppp1p/1n4p1/8/8/P2NN3/2PPPPPP/BR1K1RQB w Beb -
 perft 1 37
 perft 2 1029
 perft 3 36748
@@ -5933,7 +5933,7 @@ perft 5 36214583
 perft 6 1026195877
 
 id 659
-epd rbbnkr1q/p1p2ppp/1p1ppn2/8/1PP4P/8/P2PPPP1/RBBNKRNQ w FAfa - 0 9
+epd rbbnkr1q/p1p2ppp/1p1ppn2/8/1PP4P/8/P2PPPP1/RBBNKRNQ w FAfa -
 perft 1 28
 perft 2 755
 perft 3 22623
@@ -5942,7 +5942,7 @@ perft 5 18972778
 perft 6 513486101
 
 id 660
-epd r1b1krnq/pp2pppp/1bn5/2pp4/4N3/5P2/PPPPPRPP/R1BBK1NQ w Afa - 0 9
+epd r1b1krnq/pp2pppp/1bn5/2pp4/4N3/5P2/PPPPPRPP/R1BBK1NQ w Afa -
 perft 1 24
 perft 2 705
 perft 3 17427
@@ -5951,7 +5951,7 @@ perft 5 13532966
 perft 6 426443376
 
 id 661
-epd 1nbkrbn1/rpppppqp/p7/6p1/4P3/3P2P1/PPP1KP1P/RNB1RBNQ w e - 1 9
+epd 1nbkrbn1/rpppppqp/p7/6p1/4P3/3P2P1/PPP1KP1P/RNB1RBNQ w e -
 perft 1 31
 perft 2 800
 perft 3 24748
@@ -5960,7 +5960,7 @@ perft 5 21193292
 perft 6 625757852
 
 id 662
-epd r1bkrnqb/pp3ppp/n1ppp3/8/1P5P/P7/R1PPPPP1/1NBKRNQB w Eea - 0 9
+epd r1bkrnqb/pp3ppp/n1ppp3/8/1P5P/P7/R1PPPPP1/1NBKRNQB w Eea -
 perft 1 21
 perft 2 482
 perft 3 11417
@@ -5969,7 +5969,7 @@ perft 5 7112890
 perft 6 180378139
 
 id 663
-epd rbnkbrnq/ppp1p2p/5p2/3p2p1/1B1P4/1N4P1/PPP1PP1P/RB1K1RNQ w FAfa - 0 9
+epd rbnkbrnq/ppp1p2p/5p2/3p2p1/1B1P4/1N4P1/PPP1PP1P/RB1K1RNQ w FAfa -
 perft 1 33
 perft 2 780
 perft 3 25532
@@ -5978,7 +5978,7 @@ perft 5 20756770
 perft 6 535497008
 
 id 664
-epd rnk1brnq/pp1ppppp/2p5/b7/8/1P2P2P/P1PP1PPQ/RNKBBRN1 w FAfa - 3 9
+epd rnk1brnq/pp1ppppp/2p5/b7/8/1P2P2P/P1PP1PPQ/RNKBBRN1 w FAfa -
 perft 1 29
 perft 2 648
 perft 3 19043
@@ -5987,7 +5987,7 @@ perft 5 13722785
 perft 6 341389148
 
 id 665
-epd rnkrbbnq/p1p3pp/5p2/1p1pp3/P7/1PN2P2/2PPP1PP/R1KRBBNQ w DAda - 0 9
+epd rnkrbbnq/p1p3pp/5p2/1p1pp3/P7/1PN2P2/2PPP1PP/R1KRBBNQ w DAda -
 perft 1 26
 perft 2 827
 perft 3 21865
@@ -5996,7 +5996,7 @@ perft 5 18916370
 perft 6 589161126
 
 id 666
-epd r1krbnqb/p1pp1ppp/2n1p3/8/1p4P1/PPP5/3PPP1P/RNKRBNQB w DAda - 1 9
+epd r1krbnqb/p1pp1ppp/2n1p3/8/1p4P1/PPP5/3PPP1P/RNKRBNQB w DAda -
 perft 1 25
 perft 2 540
 perft 3 14709
@@ -6005,7 +6005,7 @@ perft 5 9491817
 perft 6 225389422
 
 id 667
-epd rbnkrnbq/ppp1pp2/3p2p1/2N5/P6p/2P5/1P1PPPPP/RB1KRNBQ w EAea - 0 9
+epd rbnkrnbq/ppp1pp2/3p2p1/2N5/P6p/2P5/1P1PPPPP/RB1KRNBQ w EAea -
 perft 1 32
 perft 2 790
 perft 3 25107
@@ -6014,7 +6014,7 @@ perft 5 20906017
 perft 6 578332225
 
 id 668
-epd rnkbrn1q/1ppppppb/8/p4N1p/8/P1N5/1PPPPPPP/R1KBR1BQ w EAea - 0 9
+epd rnkbrn1q/1ppppppb/8/p4N1p/8/P1N5/1PPPPPPP/R1KBR1BQ w EAea -
 perft 1 31
 perft 2 691
 perft 3 20813
@@ -6023,7 +6023,7 @@ perft 5 15308408
 perft 6 404129987
 
 id 669
-epd rnkrnbbq/p1p2ppp/3pp3/1p6/6P1/4PQ1B/PPPP1P1P/RNKRN1B1 w DAda - 0 9
+epd rnkrnbbq/p1p2ppp/3pp3/1p6/6P1/4PQ1B/PPPP1P1P/RNKRN1B1 w DAda -
 perft 1 29
 perft 2 558
 perft 3 16800
@@ -6032,7 +6032,7 @@ perft 5 10825379
 perft 6 246965507
 
 id 670
-epd rnkrnqbb/pp2p1p1/3p3p/2p2p2/5P2/1P1N4/P1PPPQPP/RNKR2BB w DAda - 0 9
+epd rnkrnqbb/pp2p1p1/3p3p/2p2p2/5P2/1P1N4/P1PPPQPP/RNKR2BB w DAda -
 perft 1 29
 perft 2 762
 perft 3 23210
@@ -6041,7 +6041,7 @@ perft 5 20522675
 perft 6 596067005
 
 id 671
-epd bb1rknnr/ppqppppp/8/2p5/3P1N2/1P6/P1P1PPPP/BBQRKN1R w HDhd - 1 9
+epd bb1rknnr/ppqppppp/8/2p5/3P1N2/1P6/P1P1PPPP/BBQRKN1R w HDhd -
 perft 1 33
 perft 2 963
 perft 3 32279
@@ -6050,7 +6050,7 @@ perft 5 34552118
 perft 6 1124738493
 
 id 672
-epd bqrbknnr/ppp1p2p/8/3p1p2/5p2/P3N2P/1PPPP1P1/BQRBK1NR w HChc - 0 9
+epd bqrbknnr/ppp1p2p/8/3p1p2/5p2/P3N2P/1PPPP1P1/BQRBK1NR w HChc -
 perft 1 20
 perft 2 398
 perft 3 9009
@@ -6059,7 +6059,7 @@ perft 5 4834319
 perft 6 113660536
 
 id 673
-epd b1rk1bnr/qpp1pppp/p4n2/3p4/3PPP2/7N/PPP3PP/BQRKNB1R w HChc - 1 9
+epd b1rk1bnr/qpp1pppp/p4n2/3p4/3PPP2/7N/PPP3PP/BQRKNB1R w HChc -
 perft 1 25
 perft 2 648
 perft 3 16587
@@ -6068,7 +6068,7 @@ perft 5 12200870
 perft 6 351766307
 
 id 674
-epd bqkrnnrb/pppp2p1/4pp2/4P2p/6P1/7P/PPPP1P2/BQRKNNRB w GC - 1 9
+epd bqkrnnrb/pppp2p1/4pp2/4P2p/6P1/7P/PPPP1P2/BQRKNNRB w GC -
 perft 1 30
 perft 2 493
 perft 3 15118
@@ -6077,7 +6077,7 @@ perft 5 8786998
 perft 6 181492621
 
 id 675
-epd q1brknnr/1p1ppppp/p7/2p5/8/1PPP4/P2RPPPP/QBB1KNNR w Hhd - 0 9
+epd q1brknnr/1p1ppppp/p7/2p5/8/1PPP4/P2RPPPP/QBB1KNNR w Hhd -
 perft 1 25
 perft 2 501
 perft 3 13206
@@ -6086,7 +6086,7 @@ perft 5 7982978
 perft 6 192717198
 
 id 676
-epd qrb1k1nr/ppppb1pp/6n1/4ppN1/3P4/4N3/PPP1PPPP/QRBBK2R w HBhb - 2 9
+epd qrb1k1nr/ppppb1pp/6n1/4ppN1/3P4/4N3/PPP1PPPP/QRBBK2R w HBhb -
 perft 1 31
 perft 2 872
 perft 3 26191
@@ -6095,7 +6095,7 @@ perft 5 22493014
 perft 6 646855304
 
 id 677
-epd 1rbknbnr/1ppp1pp1/q6p/p3p3/5P2/2PPB3/PP2P1PP/QR1KNBNR w HBhb - 0 9
+epd 1rbknbnr/1ppp1pp1/q6p/p3p3/5P2/2PPB3/PP2P1PP/QR1KNBNR w HBhb -
 perft 1 28
 perft 2 1020
 perft 3 28147
@@ -6104,7 +6104,7 @@ perft 5 27484692
 perft 6 947786800
 
 id 678
-epd qrbk2rb/1ppp1ppp/5nn1/p3p3/1N6/P7/1PPPPPPP/QRB1KNRB w gb - 0 9
+epd qrbk2rb/1ppp1ppp/5nn1/p3p3/1N6/P7/1PPPPPPP/QRB1KNRB w gb -
 perft 1 23
 perft 2 592
 perft 3 14398
@@ -6113,7 +6113,7 @@ perft 5 10098215
 perft 6 293988585
 
 id 679
-epd qbrk1nnr/1pp1pppp/2b5/p2p4/P2P2P1/8/1PP1PP1P/QBKRBNNR w hc - 1 9
+epd qbrk1nnr/1pp1pppp/2b5/p2p4/P2P2P1/8/1PP1PP1P/QBKRBNNR w hc -
 perft 1 26
 perft 2 654
 perft 3 18103
@@ -6122,7 +6122,7 @@ perft 5 13740891
 perft 6 373081138
 
 id 680
-epd qrkbbnnr/ppp2p1p/4p3/3p2p1/P7/2PP4/1P2PPPP/QRKBBNNR w HBhb - 0 9
+epd qrkbbnnr/ppp2p1p/4p3/3p2p1/P7/2PP4/1P2PPPP/QRKBBNNR w HBhb -
 perft 1 25
 perft 2 626
 perft 3 16616
@@ -6131,7 +6131,7 @@ perft 5 12079406
 perft 6 324006164
 
 id 681
-epd qr1kbbnr/ppp1pp1p/4n1p1/2Pp4/6P1/4N3/PP1PPP1P/QRK1BBNR w HB d6 0 9
+epd qr1kbbnr/ppp1pp1p/4n1p1/2Pp4/6P1/4N3/PP1PPP1P/QRK1BBNR w HB d6
 perft 1 26
 perft 2 699
 perft 3 18068
@@ -6140,7 +6140,7 @@ perft 5 13353359
 perft 6 375702908
 
 id 682
-epd qrk1b1rb/p1pppppp/3nnQ2/1p6/1P3P2/3P4/P1P1P1PP/1RKNBNRB w GBgb - 3 9
+epd qrk1b1rb/p1pppppp/3nnQ2/1p6/1P3P2/3P4/P1P1P1PP/1RKNBNRB w GBgb -
 perft 1 43
 perft 2 1369
 perft 3 55463
@@ -6149,7 +6149,7 @@ perft 5 71514365
 perft 6 2427477375
 
 id 683
-epd qbrk1nbr/pppp3p/5n2/4ppp1/3P1P2/4N3/PPP1P1PP/QBKRN1BR w hc - 0 9
+epd qbrk1nbr/pppp3p/5n2/4ppp1/3P1P2/4N3/PPP1P1PP/QBKRN1BR w hc -
 perft 1 25
 perft 2 752
 perft 3 20165
@@ -6158,7 +6158,7 @@ perft 5 17493373
 perft 6 543180234
 
 id 684
-epd qrkb1nbr/1pppppQp/3n4/p7/5p2/1P1N4/P1PPP1PP/1RKB1NBR w HBhb - 0 9
+epd qrkb1nbr/1pppppQp/3n4/p7/5p2/1P1N4/P1PPP1PP/1RKB1NBR w HBhb -
 perft 1 45
 perft 2 946
 perft 3 40100
@@ -6167,7 +6167,7 @@ perft 5 39736157
 perft 6 1051910977
 
 id 685
-epd qrk1nbbr/ppp1p1p1/4n2p/3p1p2/1P5P/3P2P1/P1P1PP2/QRKNNBBR w HBhb - 1 9
+epd qrk1nbbr/ppp1p1p1/4n2p/3p1p2/1P5P/3P2P1/P1P1PP2/QRKNNBBR w HBhb -
 perft 1 32
 perft 2 770
 perft 3 25367
@@ -6176,7 +6176,7 @@ perft 5 21717615
 perft 6 577979364
 
 id 686
-epd qrkn1rbb/pp2pppp/2p5/3p4/P2Qn1P1/1P6/2PPPP1P/1RKNNRBB w FBfb - 0 9
+epd qrkn1rbb/pp2pppp/2p5/3p4/P2Qn1P1/1P6/2PPPP1P/1RKNNRBB w FBfb -
 perft 1 38
 perft 2 943
 perft 3 35335
@@ -6185,7 +6185,7 @@ perft 5 31909835
 perft 6 798405123
 
 id 687
-epd bbrqknnr/ppp4p/3pp3/5pp1/4PP2/5Q2/PPPP2PP/BBR1KNNR w HChc - 0 9
+epd bbrqknnr/ppp4p/3pp3/5pp1/4PP2/5Q2/PPPP2PP/BBR1KNNR w HChc -
 perft 1 36
 perft 2 843
 perft 3 29974
@@ -6194,7 +6194,7 @@ perft 5 26828059
 perft 6 723306114
 
 id 688
-epd 1rqbkn1r/p1p1pppp/1p5n/P2p4/3Pb1P1/8/1PP1PP1P/BRQBKNNR w HBhb - 0 9
+epd 1rqbkn1r/p1p1pppp/1p5n/P2p4/3Pb1P1/8/1PP1PP1P/BRQBKNNR w HBhb -
 perft 1 23
 perft 2 778
 perft 3 19482
@@ -6203,7 +6203,7 @@ perft 5 17337683
 perft 6 579112676
 
 id 689
-epd br1knbnr/1qp1pppp/pp1p4/8/8/PP6/2PPPPPP/BRQKNBNR w HBhb - 2 9
+epd br1knbnr/1qp1pppp/pp1p4/8/8/PP6/2PPPPPP/BRQKNBNR w HBhb -
 perft 1 26
 perft 2 697
 perft 3 18835
@@ -6212,7 +6212,7 @@ perft 5 15280079
 perft 6 473071890
 
 id 690
-epd brqk2rb/ppppp1pp/4np2/8/2n5/3P1Q2/PP2PPPP/BR1KNNRB w GBgb - 0 9
+epd brqk2rb/ppppp1pp/4np2/8/2n5/3P1Q2/PP2PPPP/BR1KNNRB w GBgb -
 perft 1 32
 perft 2 948
 perft 3 30434
@@ -6221,7 +6221,7 @@ perft 5 29821322
 perft 6 874251866
 
 id 691
-epd r1bqknnr/pp1pp1p1/5p1p/2p1b2N/2P5/8/PPQPPPPP/RBB1K1NR w HAha - 0 9
+epd r1bqknnr/pp1pp1p1/5p1p/2p1b2N/2P5/8/PPQPPPPP/RBB1K1NR w HAha -
 perft 1 31
 perft 2 785
 perft 3 25549
@@ -6230,7 +6230,7 @@ perft 5 22244193
 perft 6 592797491
 
 id 692
-epd rqbbknnr/ppppp2p/5pp1/8/8/1P3PP1/PQPPP2P/R1BBKNNR w HAha - 0 9
+epd rqbbknnr/ppppp2p/5pp1/8/8/1P3PP1/PQPPP2P/R1BBKNNR w HAha -
 perft 1 23
 perft 2 391
 perft 3 10163
@@ -6239,7 +6239,7 @@ perft 5 5576671
 perft 6 121267576
 
 id 693
-epd rqbknbnr/1pp1p2p/p7/3p1pp1/7N/1PP5/P2PPPPP/RQBK1BNR w HAha - 0 9
+epd rqbknbnr/1pp1p2p/p7/3p1pp1/7N/1PP5/P2PPPPP/RQBK1BNR w HAha -
 perft 1 27
 perft 2 676
 perft 3 19606
@@ -6248,7 +6248,7 @@ perft 5 15955388
 perft 6 448477218
 
 id 694
-epd rqb1nnrb/2ppkppp/1p2p3/p7/2PPP3/1P6/P4PPP/RQBKNNRB w GA - 1 9
+epd rqb1nnrb/2ppkppp/1p2p3/p7/2PPP3/1P6/P4PPP/RQBKNNRB w GA -
 perft 1 31
 perft 2 727
 perft 3 22895
@@ -6257,7 +6257,7 @@ perft 5 18361051
 perft 6 483248153
 
 id 695
-epd rb1kbn1r/p1ppppp1/qp5n/7p/P7/RPP5/3PPPPP/1BQKBNNR w Hha - 2 9
+epd rb1kbn1r/p1ppppp1/qp5n/7p/P7/RPP5/3PPPPP/1BQKBNNR w Hha -
 perft 1 29
 perft 2 837
 perft 3 23815
@@ -6266,7 +6266,7 @@ perft 5 21279560
 perft 6 682863811
 
 id 696
-epd rqkbb1nr/p1p2ppp/1p1p2n1/3Np3/4P3/5N2/PPPP1PPP/RQKBB2R w HAha - 0 9
+epd rqkbb1nr/p1p2ppp/1p1p2n1/3Np3/4P3/5N2/PPPP1PPP/RQKBB2R w HAha -
 perft 1 28
 perft 2 717
 perft 3 20663
@@ -6275,7 +6275,7 @@ perft 5 16347343
 perft 6 453153783
 
 id 697
-epd rqknbbr1/p1pppp1p/1p3np1/8/4P3/2P2P1P/PP1P2P1/RQKNBBNR w HAa - 0 9
+epd rqknbbr1/p1pppp1p/1p3np1/8/4P3/2P2P1P/PP1P2P1/RQKNBBNR w HAa -
 perft 1 27
 perft 2 650
 perft 3 18231
@@ -6284,7 +6284,7 @@ perft 5 13847463
 perft 6 383256006
 
 id 698
-epd r1k1bnrb/1qpppppp/1p2n3/p7/1P5P/6P1/P1PPPP2/RQKNBNR1 w GAga - 1 9
+epd r1k1bnrb/1qpppppp/1p2n3/p7/1P5P/6P1/P1PPPP2/RQKNBNR1 w GAga -
 perft 1 24
 perft 2 806
 perft 3 20693
@@ -6293,7 +6293,7 @@ perft 5 19382263
 perft 6 686009788
 
 id 699
-epd rb1knnbr/1pp1ppp1/p2p3p/5q2/3B2P1/3P1P2/PPP1P2P/RBQKNN1R w HAha - 0 9
+epd rb1knnbr/1pp1ppp1/p2p3p/5q2/3B2P1/3P1P2/PPP1P2P/RBQKNN1R w HAha -
 perft 1 34
 perft 2 1360
 perft 3 44096
@@ -6302,7 +6302,7 @@ perft 5 51973672
 perft 6 1837704407
 
 id 700
-epd rqkb1nbr/p1p1ppp1/1p3n1p/2Qp4/8/2P5/PP1PPPPP/R1KBNNBR w HAha - 2 9
+epd rqkb1nbr/p1p1ppp1/1p3n1p/2Qp4/8/2P5/PP1PPPPP/R1KBNNBR w HAha -
 perft 1 39
 perft 2 983
 perft 3 38218
@@ -6311,7 +6311,7 @@ perft 5 36347815
 perft 6 918801645
 
 id 701
-epd rqknnbbr/2pppp2/pp5p/6p1/1P1P4/4PP2/P1P3PP/RQKNNBBR w HAha - 0 9
+epd rqknnbbr/2pppp2/pp5p/6p1/1P1P4/4PP2/P1P3PP/RQKNNBBR w HAha -
 perft 1 26
 perft 2 628
 perft 3 17638
@@ -6320,7 +6320,7 @@ perft 5 13787303
 perft 6 386125234
 
 id 702
-epd rqkn1rbb/1pp1pppp/p7/3p4/3Pn3/2P1PP2/PP4PP/RQKNNRBB w FAfa - 1 9
+epd rqkn1rbb/1pp1pppp/p7/3p4/3Pn3/2P1PP2/PP4PP/RQKNNRBB w FAfa -
 perft 1 20
 perft 2 527
 perft 3 12216
@@ -6329,7 +6329,7 @@ perft 5 8082183
 perft 6 219311659
 
 id 703
-epd bbrkqn1r/1pppppp1/5n2/p7/1PP2P1p/7N/P2PP1PP/BBRKQN1R w HChc - 1 9
+epd bbrkqn1r/1pppppp1/5n2/p7/1PP2P1p/7N/P2PP1PP/BBRKQN1R w HChc -
 perft 1 36
 perft 2 963
 perft 3 35291
@@ -6338,7 +6338,7 @@ perft 5 35907489
 perft 6 1034223364
 
 id 704
-epd brkbqn1r/p2ppppp/7n/1p6/P1p3PP/8/1PPPPP1N/BRKBQ1NR w HBhb - 0 9
+epd brkbqn1r/p2ppppp/7n/1p6/P1p3PP/8/1PPPPP1N/BRKBQ1NR w HBhb -
 perft 1 18
 perft 2 583
 perft 3 11790
@@ -6347,7 +6347,7 @@ perft 5 8858385
 perft 6 304339862
 
 id 705
-epd brkq1bnr/pp1ppp1p/8/2p2np1/P7/8/1PPPPPPP/BRKQNBNR w HBhb - 0 9
+epd brkq1bnr/pp1ppp1p/8/2p2np1/P7/8/1PPPPPPP/BRKQNBNR w HBhb -
 perft 1 19
 perft 2 552
 perft 3 11811
@@ -6356,7 +6356,7 @@ perft 5 8432183
 perft 6 262293169
 
 id 706
-epd brkqnnrb/1ppppppp/8/8/p3P3/5N2/PPPP1PPP/BRKQ1NRB w GBgb - 3 9
+epd brkqnnrb/1ppppppp/8/8/p3P3/5N2/PPPP1PPP/BRKQ1NRB w GBgb -
 perft 1 21
 perft 2 397
 perft 3 9653
@@ -6365,7 +6365,7 @@ perft 5 5489836
 perft 6 128389738
 
 id 707
-epd rbbkq1nr/1p2pppp/p1p3nB/3p4/1Q1P4/6N1/PPP1PPPP/RB1K2NR w HAha - 0 9
+epd rbbkq1nr/1p2pppp/p1p3nB/3p4/1Q1P4/6N1/PPP1PPPP/RB1K2NR w HAha -
 perft 1 40
 perft 2 1132
 perft 3 43404
@@ -6374,7 +6374,7 @@ perft 5 47425783
 perft 6 1415578783
 
 id 708
-epd rkbbq1nr/1pppp1p1/4np2/p6p/8/PP3P2/1KPPP1PP/R1BBQNNR w ha - 0 9
+epd rkbbq1nr/1pppp1p1/4np2/p6p/8/PP3P2/1KPPP1PP/R1BBQNNR w ha -
 perft 1 24
 perft 2 596
 perft 3 15220
@@ -6383,7 +6383,7 @@ perft 5 10822049
 perft 6 302056813
 
 id 709
-epd r1bqn1nr/pkpppp1p/1p4pb/8/PN6/R7/1PPPPPPP/1KBQ1BNR w H - 2 9
+epd r1bqn1nr/pkpppp1p/1p4pb/8/PN6/R7/1PPPPPPP/1KBQ1BNR w H -
 perft 1 33
 perft 2 794
 perft 3 25450
@@ -6392,7 +6392,7 @@ perft 5 20919309
 perft 6 561073410
 
 id 710
-epd rkb1nnrb/1pppq1pp/p4p2/4p3/5P2/1P1PB3/P1P1P1PP/RK1QNNRB w GAga - 0 9
+epd rkb1nnrb/1pppq1pp/p4p2/4p3/5P2/1P1PB3/P1P1P1PP/RK1QNNRB w GAga -
 perft 1 26
 perft 2 625
 perft 3 17050
@@ -6401,7 +6401,7 @@ perft 5 12515042
 perft 6 342967558
 
 id 711
-epd rbkqbn1r/pppp1p1p/2n1p1p1/8/8/1P1PP1N1/P1P2PPP/RBKQB1NR w HAha - 1 9
+epd rbkqbn1r/pppp1p1p/2n1p1p1/8/8/1P1PP1N1/P1P2PPP/RBKQB1NR w HAha -
 perft 1 30
 perft 2 660
 perft 3 20308
@@ -6410,7 +6410,7 @@ perft 5 15348335
 perft 6 403323883
 
 id 712
-epd rkqbb1n1/pppppppr/8/6np/5P2/8/PPPPP1PP/RKQBBNNR w HAa - 6 9
+epd rkqbb1n1/pppppppr/8/6np/5P2/8/PPPPP1PP/RKQBBNNR w HAa -
 perft 1 23
 perft 2 500
 perft 3 12154
@@ -6419,7 +6419,7 @@ perft 5 7519117
 perft 6 196524441
 
 id 713
-epd rkqnbbnr/ppppppp1/8/7p/3N4/6PP/PPPPPP2/RKQNBB1R w HAa - 0 9
+epd rkqnbbnr/ppppppp1/8/7p/3N4/6PP/PPPPPP2/RKQNBB1R w HAa -
 perft 1 24
 perft 2 484
 perft 3 12495
@@ -6428,7 +6428,7 @@ perft 5 7775173
 perft 6 193947530
 
 id 714
-epd rkqnb1rb/p1p1pppp/1p1p4/2n5/3P4/2P1N1N1/PP2PPPP/RKQ1B1RB w GAga - 0 9
+epd rkqnb1rb/p1p1pppp/1p1p4/2n5/3P4/2P1N1N1/PP2PPPP/RKQ1B1RB w GAga -
 perft 1 28
 perft 2 1020
 perft 3 29124
@@ -6437,7 +6437,7 @@ perft 5 30515456
 perft 6 1073711823
 
 id 715
-epd rbk1nnbr/1ppq1ppp/p2p4/4p3/P3B2P/2P5/1P1PPPP1/R1KQNNBR w HAha - 2 9
+epd rbk1nnbr/1ppq1ppp/p2p4/4p3/P3B2P/2P5/1P1PPPP1/R1KQNNBR w HAha -
 perft 1 38
 perft 2 998
 perft 3 37265
@@ -6446,7 +6446,7 @@ perft 5 38552638
 perft 6 1139322479
 
 id 716
-epd r1qbn1br/k1pppppp/6n1/pp6/5P1P/P7/1PPPP1PB/RKQBNN1R w HA - 1 9
+epd r1qbn1br/k1pppppp/6n1/pp6/5P1P/P7/1PPPP1PB/RKQBNN1R w HA -
 perft 1 22
 perft 2 549
 perft 3 12867
@@ -6455,7 +6455,7 @@ perft 5 8725809
 perft 6 251613569
 
 id 717
-epd rkqnn1br/pppp3p/4p1pb/5p2/P2P4/7P/1PP1PPPB/RKQNNB1R w HAha - 1 9
+epd rkqnn1br/pppp3p/4p1pb/5p2/P2P4/7P/1PP1PPPB/RKQNNB1R w HAha -
 perft 1 32
 perft 2 659
 perft 3 21249
@@ -6464,7 +6464,7 @@ perft 5 15434721
 perft 6 365761521
 
 id 718
-epd rk1nnrbb/p1p1pppp/1p6/3p1q2/P3P3/2NN4/1PPP1PPP/RKQ2RBB w FAfa - 3 9
+epd rk1nnrbb/p1p1pppp/1p6/3p1q2/P3P3/2NN4/1PPP1PPP/RKQ2RBB w FAfa -
 perft 1 29
 perft 2 989
 perft 3 29087
@@ -6473,7 +6473,7 @@ perft 5 29643404
 perft 6 998848556
 
 id 719
-epd bbrk1q1r/ppppppp1/3n4/7p/3Pn3/6PN/PPP1PPNP/BBRK1Q1R w HChc - 2 9
+epd bbrk1q1r/ppppppp1/3n4/7p/3Pn3/6PN/PPP1PPNP/BBRK1Q1R w HChc -
 perft 1 23
 perft 2 712
 perft 3 16551
@@ -6482,7 +6482,7 @@ perft 5 12995202
 perft 6 411077508
 
 id 720
-epd brkbnq1r/p1ppp2p/5ppn/1p6/5P2/1P1P2P1/P1P1P2P/BRKBNQNR w HBhb - 0 9
+epd brkbnq1r/p1ppp2p/5ppn/1p6/5P2/1P1P2P1/P1P1P2P/BRKBNQNR w HBhb -
 perft 1 28
 perft 2 856
 perft 3 24984
@@ -6491,7 +6491,7 @@ perft 5 23529352
 perft 6 754501112
 
 id 721
-epd br1k1bnr/ppppp1pp/4np2/1B2P2q/3P4/8/PPP2PPP/BRKNQ1NR w HB - 3 9
+epd br1k1bnr/ppppp1pp/4np2/1B2P2q/3P4/8/PPP2PPP/BRKNQ1NR w HB -
 perft 1 36
 perft 2 1214
 perft 3 40615
@@ -6500,7 +6500,7 @@ perft 5 45096834
 perft 6 1470987023
 
 id 722
-epd brk1qnrb/pnppp1p1/1p6/5p1p/8/5PPP/PPPPP1R1/BRKNQN1B w Bgb - 0 9
+epd brk1qnrb/pnppp1p1/1p6/5p1p/8/5PPP/PPPPP1R1/BRKNQN1B w Bgb -
 perft 1 22
 perft 2 551
 perft 3 13111
@@ -6509,7 +6509,7 @@ perft 5 9040545
 perft 6 259643605
 
 id 723
-epd rbbkn1nr/1ppp2pp/p3p3/2q2p2/3P4/6P1/PPPBPP1P/RB1KNQNR w HAha - 0 9
+epd rbbkn1nr/1ppp2pp/p3p3/2q2p2/3P4/6P1/PPPBPP1P/RB1KNQNR w HAha -
 perft 1 31
 perft 2 1060
 perft 3 31332
@@ -6518,7 +6518,7 @@ perft 5 30314172
 perft 6 976268967
 
 id 724
-epd rkbbn1nr/ppppp1pp/8/6N1/5p2/1q6/P1PPPPPP/RKBBN1QR w HAha - 0 9
+epd rkbbn1nr/ppppp1pp/8/6N1/5p2/1q6/P1PPPPPP/RKBBN1QR w HAha -
 perft 1 3
 perft 2 72
 perft 3 1919
@@ -6527,7 +6527,7 @@ perft 5 1400832
 perft 6 39654253
 
 id 725
-epd rkb2bnr/pp2pppp/2p1n3/3p4/q2P4/5NP1/PPP1PP1P/RKBNQBR1 w Aha - 0 9
+epd rkb2bnr/pp2pppp/2p1n3/3p4/q2P4/5NP1/PPP1PP1P/RKBNQBR1 w Aha -
 perft 1 29
 perft 2 861
 perft 3 24504
@@ -6536,7 +6536,7 @@ perft 5 22763215
 perft 6 731511256
 
 id 726
-epd rkbq1nrb/ppppppp1/7p/8/1P1n4/P4P1P/2PPP1P1/RKBNQNRB w GAga - 0 9
+epd rkbq1nrb/ppppppp1/7p/8/1P1n4/P4P1P/2PPP1P1/RKBNQNRB w GAga -
 perft 1 25
 perft 2 672
 perft 3 17631
@@ -6545,7 +6545,7 @@ perft 5 12954224
 perft 6 361237536
 
 id 727
-epd rbknb1nr/ppp1qp1p/6p1/3pp3/3P3P/2B1P3/PPP2PP1/RBKN1QNR w HAha - 1 9
+epd rbknb1nr/ppp1qp1p/6p1/3pp3/3P3P/2B1P3/PPP2PP1/RBKN1QNR w HAha -
 perft 1 27
 perft 2 857
 perft 3 24688
@@ -6554,7 +6554,7 @@ perft 5 23790033
 perft 6 768247869
 
 id 728
-epd rknbbq1r/p1pppppp/1p2N3/8/3n4/2P5/PP1PPPPP/RK1BBQNR w HAha - 4 9
+epd rknbbq1r/p1pppppp/1p2N3/8/3n4/2P5/PP1PPPPP/RK1BBQNR w HAha -
 perft 1 29
 perft 2 763
 perft 3 22138
@@ -6563,7 +6563,7 @@ perft 5 16926075
 perft 6 447896703
 
 id 729
-epd r1nqbbnr/1pppp1pp/1k6/p4p2/8/4P3/PPPP1PPP/RKN1BBNR w HA - 0 9
+epd r1nqbbnr/1pppp1pp/1k6/p4p2/8/4P3/PPPP1PPP/RKN1BBNR w HA -
 perft 1 26
 perft 2 658
 perft 3 17302
@@ -6572,7 +6572,7 @@ perft 5 12380488
 perft 6 349047256
 
 id 730
-epd rkn2qrb/ppp1pppp/6n1/1b1p4/1P6/4PPB1/P1PP2PP/RKNQ1NRB w GAga - 3 9
+epd rkn2qrb/ppp1pppp/6n1/1b1p4/1P6/4PPB1/P1PP2PP/RKNQ1NRB w GAga -
 perft 1 23
 perft 2 574
 perft 3 14070
@@ -6581,7 +6581,7 @@ perft 5 9501401
 perft 6 263870337
 
 id 731
-epd rbkn2br/ppppp1p1/4np1p/1P5q/8/2P1N3/P2PPPPP/RBK1QNBR w HAha - 1 9
+epd rbkn2br/ppppp1p1/4np1p/1P5q/8/2P1N3/P2PPPPP/RBK1QNBR w HAha -
 perft 1 29
 perft 2 992
 perft 3 29506
@@ -6590,7 +6590,7 @@ perft 5 30148787
 perft 6 1045942540
 
 id 732
-epd 1knbqnbr/1ppppp1p/r5p1/p7/7P/2PN2P1/PP1PPP2/RK1BQNBR w HAh - 2 9
+epd 1knbqnbr/1ppppp1p/r5p1/p7/7P/2PN2P1/PP1PPP2/RK1BQNBR w HAh -
 perft 1 26
 perft 2 698
 perft 3 19395
@@ -6599,7 +6599,7 @@ perft 5 14848229
 perft 6 402599313
 
 id 733
-epd rk1qnbbr/pnpppp1p/6p1/1p6/3P4/1P6/P1P1PPPP/RKNQNBBR w HAha - 1 9
+epd rk1qnbbr/pnpppp1p/6p1/1p6/3P4/1P6/P1P1PPPP/RKNQNBBR w HAha -
 perft 1 20
 perft 2 480
 perft 3 11159
@@ -6608,7 +6608,7 @@ perft 5 7425917
 perft 6 203194521
 
 id 734
-epd rknqnrbb/pp1p2p1/5p1p/2p1p3/2P1P3/P2P4/1P3PPP/RKNQNRBB w FAfa - 0 9
+epd rknqnrbb/pp1p2p1/5p1p/2p1p3/2P1P3/P2P4/1P3PPP/RKNQNRBB w FAfa -
 perft 1 26
 perft 2 679
 perft 3 18116
@@ -6617,7 +6617,7 @@ perft 5 13790137
 perft 6 392629571
 
 id 735
-epd bbrk2qr/pp1p1ppp/3n2n1/2p1p3/3P1P2/6N1/PPP1P1PP/BBRKN1QR w HChc - 0 9
+epd bbrk2qr/pp1p1ppp/3n2n1/2p1p3/3P1P2/6N1/PPP1P1PP/BBRKN1QR w HChc -
 perft 1 26
 perft 2 790
 perft 3 21521
@@ -6626,7 +6626,7 @@ perft 5 19259490
 perft 6 617563700
 
 id 736
-epd b1krnnqr/1p1ppppp/p1p5/b6B/P7/4P1N1/1PPP1PPP/BRK1N1QR w HB - 2 9
+epd b1krnnqr/1p1ppppp/p1p5/b6B/P7/4P1N1/1PPP1PPP/BRK1N1QR w HB -
 perft 1 26
 perft 2 625
 perft 3 16451
@@ -6635,7 +6635,7 @@ perft 5 11490615
 perft 6 304805107
 
 id 737
-epd 1rknnbqr/3ppppp/p7/1pp5/4b2P/P4P2/1PPPP1PR/BRKNNBQ1 w Bhb - 1 9
+epd 1rknnbqr/3ppppp/p7/1pp5/4b2P/P4P2/1PPPP1PR/BRKNNBQ1 w Bhb -
 perft 1 24
 perft 2 757
 perft 3 19746
@@ -6644,7 +6644,7 @@ perft 5 17275100
 perft 6 544309489
 
 id 738
-epd br1nn1rb/pppkpqpp/3p1p2/8/PP6/4N3/1KPPPPPP/BR2NQRB w - - 3 9
+epd br1nn1rb/pppkpqpp/3p1p2/8/PP6/4N3/1KPPPPPP/BR2NQRB w - -
 perft 1 24
 perft 2 682
 perft 3 17129
@@ -6653,7 +6653,7 @@ perft 5 13057308
 perft 6 375033550
 
 id 739
-epd rbbkn1qr/pppp2p1/6np/4pp2/7N/7P/PPPPPPPR/RBBK1NQ1 w Aha - 0 9
+epd rbbkn1qr/pppp2p1/6np/4pp2/7N/7P/PPPPPPPR/RBBK1NQ1 w Aha -
 perft 1 22
 perft 2 586
 perft 3 14158
@@ -6662,7 +6662,7 @@ perft 5 10607781
 perft 6 324452612
 
 id 740
-epd rk1bn1qr/pppbpppp/4n3/4p3/4P3/5P2/PPPP2PP/RKBB1NQR w HAha - 1 9
+epd rk1bn1qr/pppbpppp/4n3/4p3/4P3/5P2/PPPP2PP/RKBB1NQR w HAha -
 perft 1 22
 perft 2 530
 perft 3 13440
@@ -6671,7 +6671,7 @@ perft 5 9514787
 perft 6 259898748
 
 id 741
-epd rkbnnbqr/1ppp1ppp/p7/4p3/8/QP3P2/P1PPP1PP/RKBNNB1R w HAha - 0 9
+epd rkbnnbqr/1ppp1ppp/p7/4p3/8/QP3P2/P1PPP1PP/RKBNNB1R w HAha -
 perft 1 29
 perft 2 705
 perft 3 21511
@@ -6680,7 +6680,7 @@ perft 5 17524731
 perft 6 472356665
 
 id 742
-epd 1kbnnqrb/1pp1p1pp/r4p2/p2p4/N4P2/3P4/PPP1P1PP/RKB1NQRB w GAg - 2 9
+epd 1kbnnqrb/1pp1p1pp/r4p2/p2p4/N4P2/3P4/PPP1P1PP/RKB1NQRB w GAg -
 perft 1 21
 perft 2 623
 perft 3 14979
@@ -6689,7 +6689,7 @@ perft 5 11601134
 perft 6 343214006
 
 id 743
-epd rbknbn1r/pppp1p1p/4p1q1/8/P1P3Pp/8/1P1PPP2/RBKNBNQR w HAha - 0 9
+epd rbknbn1r/pppp1p1p/4p1q1/8/P1P3Pp/8/1P1PPP2/RBKNBNQR w HAha -
 perft 1 30
 perft 2 813
 perft 3 24959
@@ -6698,7 +6698,7 @@ perft 5 23379040
 perft 6 692576573
 
 id 744
-epd rk1bb1qr/2pppppp/p2nn3/1p4P1/6QP/8/PPPPPP2/RKNBBN1R w HAha - 2 9
+epd rk1bb1qr/2pppppp/p2nn3/1p4P1/6QP/8/PPPPPP2/RKNBBN1R w HAha -
 perft 1 36
 perft 2 857
 perft 3 30124
@@ -6707,7 +6707,7 @@ perft 5 26485812
 perft 6 696999449
 
 id 745
-epd rkn1bbqr/p2ppppp/2p1n3/1p6/4PP2/6PP/PPPP4/RKNNBBQR w HAha - 0 9
+epd rkn1bbqr/p2ppppp/2p1n3/1p6/4PP2/6PP/PPPP4/RKNNBBQR w HAha -
 perft 1 33
 perft 2 687
 perft 3 22744
@@ -6716,7 +6716,7 @@ perft 5 17101732
 perft 6 412778368
 
 id 746
-epd rkn1bqrb/pnp1pppp/3p4/8/Pp6/1N2NP2/1PPPP1PP/RK2BQRB w GAga - 0 9
+epd rkn1bqrb/pnp1pppp/3p4/8/Pp6/1N2NP2/1PPPP1PP/RK2BQRB w GAga -
 perft 1 28
 perft 2 591
 perft 3 17174
@@ -6725,7 +6725,7 @@ perft 5 12182448
 perft 6 312575205
 
 id 747
-epd rbk1n1br/ppp1ppqp/2n5/2Np2p1/8/2P5/PPBPPPPP/R1KN1QBR w HAha - 4 9
+epd rbk1n1br/ppp1ppqp/2n5/2Np2p1/8/2P5/PPBPPPPP/R1KN1QBR w HAha -
 perft 1 35
 perft 2 930
 perft 3 30663
@@ -6734,7 +6734,7 @@ perft 5 27160490
 perft 6 780616047
 
 id 748
-epd rknbn1br/1ppp1ppp/p3p3/8/1q6/2P2N1P/P2PPPP1/RKNB1QBR w HAha - 0 9
+epd rknbn1br/1ppp1ppp/p3p3/8/1q6/2P2N1P/P2PPPP1/RKNB1QBR w HAha -
 perft 1 4
 perft 2 157
 perft 3 3697
@@ -6743,7 +6743,7 @@ perft 5 3454704
 perft 6 125373395
 
 id 749
-epd rkn1qbbr/pp3ppp/4n3/2ppp3/4P1P1/P2P4/1PP2P1P/RKNNQBBR w HAha - 0 9
+epd rkn1qbbr/pp3ppp/4n3/2ppp3/4P1P1/P2P4/1PP2P1P/RKNNQBBR w HAha -
 perft 1 28
 perft 2 840
 perft 3 24437
@@ -6752,7 +6752,7 @@ perft 5 23200961
 perft 6 756489357
 
 id 750
-epd rkn1qrbb/pp1ppp2/2p1n1p1/7p/2P2P1P/6P1/PP1PP3/RKNNQRBB w FAfa - 1 9
+epd rkn1qrbb/pp1ppp2/2p1n1p1/7p/2P2P1P/6P1/PP1PP3/RKNNQRBB w FAfa -
 perft 1 32
 perft 2 867
 perft 3 27595
@@ -6761,7 +6761,7 @@ perft 5 24485663
 perft 6 688115847
 
 id 751
-epd b1rknnrq/bpppp1p1/p6p/5p1P/6P1/4N3/PPPPPP2/BBRKN1RQ w GCgc - 1 9
+epd b1rknnrq/bpppp1p1/p6p/5p1P/6P1/4N3/PPPPPP2/BBRKN1RQ w GCgc -
 perft 1 33
 perft 2 851
 perft 3 28888
@@ -6770,7 +6770,7 @@ perft 5 26686205
 perft 6 731944177
 
 id 752
-epd brkb1nr1/pppppp2/3n2pp/3B4/1P6/4P3/PqPP1PPP/BRK1NNRQ w GBgb - 2 9
+epd brkb1nr1/pppppp2/3n2pp/3B4/1P6/4P3/PqPP1PPP/BRK1NNRQ w GBgb -
 perft 1 4
 perft 2 98
 perft 3 2965
@@ -6779,7 +6779,7 @@ perft 5 2352530
 perft 6 64251468
 
 id 753
-epd brk1nbrq/1ppppn1p/6p1/p4p2/P5P1/5R2/1PPPPP1P/BRKNNB1Q w Bgb - 0 9
+epd brk1nbrq/1ppppn1p/6p1/p4p2/P5P1/5R2/1PPPPP1P/BRKNNB1Q w Bgb -
 perft 1 29
 perft 2 922
 perft 3 27709
@@ -6788,7 +6788,7 @@ perft 5 27463717
 perft 6 888881062
 
 id 754
-epd brkn1rqb/1p1ppppp/3n4/p1p5/1P3P2/8/PNPPP1PP/BR1KNRQB w fb - 1 9
+epd brkn1rqb/1p1ppppp/3n4/p1p5/1P3P2/8/PNPPP1PP/BR1KNRQB w fb -
 perft 1 29
 perft 2 633
 perft 3 19399
@@ -6797,7 +6797,7 @@ perft 5 15076198
 perft 6 396737074
 
 id 755
-epd rb1k1nrq/pbp1pppp/1p1p1n2/8/5P2/4NN1P/PPPPP1P1/RBBK2RQ w GAga - 2 9
+epd rb1k1nrq/pbp1pppp/1p1p1n2/8/5P2/4NN1P/PPPPP1P1/RBBK2RQ w GAga -
 perft 1 28
 perft 2 841
 perft 3 24056
@@ -6806,7 +6806,7 @@ perft 5 20772996
 perft 6 613798447
 
 id 756
-epd rkbbnnrq/p1pp3p/4p1p1/1p3p2/P6P/1P6/1BPPPPP1/RK1BNNRQ w GAga - 0 9
+epd rkbbnnrq/p1pp3p/4p1p1/1p3p2/P6P/1P6/1BPPPPP1/RK1BNNRQ w GAga -
 perft 1 33
 perft 2 957
 perft 3 30668
@@ -6815,7 +6815,7 @@ perft 5 29735654
 perft 6 903933626
 
 id 757
-epd rk2nbrq/p1ppppp1/bpn5/7p/6P1/2N2P2/PPPPP1QP/RKB1NBR1 w GAga - 2 9
+epd rk2nbrq/p1ppppp1/bpn5/7p/6P1/2N2P2/PPPPP1QP/RKB1NBR1 w GAga -
 perft 1 24
 perft 2 687
 perft 3 18206
@@ -6824,7 +6824,7 @@ perft 5 15518417
 perft 6 484217179
 
 id 758
-epd rkbn1r1b/pp1pppnp/6q1/2p3p1/5P1P/4N3/PPPPP1P1/RKB1NRQB w FAfa - 1 9
+epd rkbn1r1b/pp1pppnp/6q1/2p3p1/5P1P/4N3/PPPPP1P1/RKB1NRQB w FAfa -
 perft 1 23
 perft 2 831
 perft 3 21254
@@ -6833,7 +6833,7 @@ perft 5 21126103
 perft 6 744755212
 
 id 759
-epd rbknb1rq/ppp1p1p1/3pnp1p/8/6PP/2PP4/PP2PP2/RBKNBNRQ w GAga - 0 9
+epd rbknb1rq/ppp1p1p1/3pnp1p/8/6PP/2PP4/PP2PP2/RBKNBNRQ w GAga -
 perft 1 31
 perft 2 838
 perft 3 26800
@@ -6842,7 +6842,7 @@ perft 5 24008129
 perft 6 677776408
 
 id 760
-epd rknbb1rq/p1pn1ppp/4p3/1p1p4/2P5/1P2N1P1/P2PPP1P/RKNBB1RQ w GAga - 1 9
+epd rknbb1rq/p1pn1ppp/4p3/1p1p4/2P5/1P2N1P1/P2PPP1P/RKNBB1RQ w GAga -
 perft 1 29
 perft 2 830
 perft 3 24798
@@ -6851,7 +6851,7 @@ perft 5 22243832
 perft 6 660040360
 
 id 761
-epd rk1nbbrq/pp1p1ppp/3n4/P3p3/2p4P/8/1PPPPPP1/RKNNBBRQ w GAga - 1 9
+epd rk1nbbrq/pp1p1ppp/3n4/P3p3/2p4P/8/1PPPPPP1/RKNNBBRQ w GAga -
 perft 1 24
 perft 2 484
 perft 3 12776
@@ -6860,7 +6860,7 @@ perft 5 8379748
 perft 6 214004367
 
 id 762
-epd rknnbr1b/ppp2pqp/3p4/4p1p1/7P/3P1P2/PPP1P1P1/RKNNBRQB w FAfa - 0 9
+epd rknnbr1b/ppp2pqp/3p4/4p1p1/7P/3P1P2/PPP1P1P1/RKNNBRQB w FAfa -
 perft 1 32
 perft 2 838
 perft 3 26408
@@ -6869,7 +6869,7 @@ perft 5 23472124
 perft 6 699211365
 
 id 763
-epd rb1k1rbq/ppppN1pp/2nn4/5p2/7P/8/PPPPPPP1/RBK1NRBQ w FA - 1 9
+epd rb1k1rbq/ppppN1pp/2nn4/5p2/7P/8/PPPPPPP1/RBK1NRBQ w FA -
 perft 1 27
 perft 2 800
 perft 3 22785
@@ -6878,7 +6878,7 @@ perft 5 20804424
 perft 6 660917073
 
 id 764
-epd r1nbnrbq/kppppp1p/6p1/8/p1PP1P2/4P3/PP4PP/RKNBNRBQ w FA - 1 9
+epd r1nbnrbq/kppppp1p/6p1/8/p1PP1P2/4P3/PP4PP/RKNBNRBQ w FA -
 perft 1 28
 perft 2 757
 perft 3 21198
@@ -6887,7 +6887,7 @@ perft 5 17180857
 perft 6 507618340
 
 id 765
-epd rkn1rbbq/p1pppppp/2n5/1pP5/8/1N2P3/PP1P1PPP/RK1NRBBQ w EAea - 1 9
+epd rkn1rbbq/p1pppppp/2n5/1pP5/8/1N2P3/PP1P1PPP/RK1NRBBQ w EAea -
 perft 1 22
 perft 2 483
 perft 3 11890
@@ -6896,7 +6896,7 @@ perft 5 7497674
 perft 6 191130942
 
 id 766
-epd rknnrqbb/2pppppp/8/p7/Np3P2/3P4/PPP1P1PP/RKN1RQBB w EAea - 0 9
+epd rknnrqbb/2pppppp/8/p7/Np3P2/3P4/PPP1P1PP/RKN1RQBB w EAea -
 perft 1 25
 perft 2 536
 perft 3 14456
@@ -6905,7 +6905,7 @@ perft 5 9694947
 perft 6 245669668
 
 id 767
-epd bb1rknrn/1qppppp1/1p4B1/p6N/8/2P5/PP1PPPPP/B1QRK1RN w GDgd - 1 9
+epd bb1rknrn/1qppppp1/1p4B1/p6N/8/2P5/PP1PPPPP/B1QRK1RN w GDgd -
 perft 1 32
 perft 2 715
 perft 3 22421
@@ -6914,7 +6914,7 @@ perft 5 17860156
 perft 6 502410909
 
 id 768
-epd b1rbknrn/qpp1ppp1/p6p/3p4/2P5/1P1P1P2/P3P1PP/BQRBKNRN w GCgc - 0 9
+epd b1rbknrn/qpp1ppp1/p6p/3p4/2P5/1P1P1P2/P3P1PP/BQRBKNRN w GCgc -
 perft 1 30
 perft 2 818
 perft 3 24421
@@ -6923,7 +6923,7 @@ perft 5 20981488
 perft 6 611986786
 
 id 769
-epd bqkrnbrn/1pp1pp1p/p7/1B1p2p1/4P3/7P/PPPP1PP1/BQKRN1RN w - - 0 9
+epd bqkrnbrn/1pp1pp1p/p7/1B1p2p1/4P3/7P/PPPP1PP1/BQKRN1RN w - -
 perft 1 28
 perft 2 676
 perft 3 18366
@@ -6932,7 +6932,7 @@ perft 5 13126287
 perft 6 363765666
 
 id 770
-epd bqrknrnb/1p2ppp1/p1pp3p/8/3P1P2/1PP5/P3P1PP/BQRKNRNB w FCfc - 0 9
+epd bqrknrnb/1p2ppp1/p1pp3p/8/3P1P2/1PP5/P3P1PP/BQRKNRNB w FCfc -
 perft 1 31
 perft 2 646
 perft 3 20686
@@ -6941,7 +6941,7 @@ perft 5 14984618
 perft 6 349082278
 
 id 771
-epd qbbrkn1r/pppppp1p/8/6p1/2P1Pn1P/6N1/PP1P1PP1/QBBRKNR1 w GDd - 3 9
+epd qbbrkn1r/pppppp1p/8/6p1/2P1Pn1P/6N1/PP1P1PP1/QBBRKNR1 w GDd -
 perft 1 20
 perft 2 532
 perft 3 11581
@@ -6950,7 +6950,7 @@ perft 5 7512432
 perft 6 202967948
 
 id 772
-epd 1rbbknr1/p1ppp1pp/1pq2pn1/8/3P4/P3P3/QPP2PPP/1RBBKNRN w GBgb - 3 9
+epd 1rbbknr1/p1ppp1pp/1pq2pn1/8/3P4/P3P3/QPP2PPP/1RBBKNRN w GBgb -
 perft 1 31
 perft 2 1002
 perft 3 30581
@@ -6959,7 +6959,7 @@ perft 5 30642468
 perft 6 1009228283
 
 id 773
-epd qrbkn1rn/pppp1ppp/8/6b1/P1P1Pp2/8/1P1P2PP/QRBKNBRN w GBgb - 0 9
+epd qrbkn1rn/pppp1ppp/8/6b1/P1P1Pp2/8/1P1P2PP/QRBKNBRN w GBgb -
 perft 1 22
 perft 2 505
 perft 3 12447
@@ -6968,7 +6968,7 @@ perft 5 8192621
 perft 6 214730959
 
 id 774
-epd qrbk1rnb/p2ppp1p/5n2/1pp3p1/8/7P/PPPPPPPN/QRBKR1NB w Bfb - 0 9
+epd qrbk1rnb/p2ppp1p/5n2/1pp3p1/8/7P/PPPPPPPN/QRBKR1NB w Bfb -
 perft 1 20
 perft 2 619
 perft 3 13448
@@ -6977,7 +6977,7 @@ perft 5 10571176
 perft 6 369603424
 
 id 775
-epd qbrkb1r1/ppp2ppp/3pn1n1/P3p3/4P3/3P4/1PP2PPP/QBRKBNRN w GCgc - 1 9
+epd qbrkb1r1/ppp2ppp/3pn1n1/P3p3/4P3/3P4/1PP2PPP/QBRKBNRN w GCgc -
 perft 1 26
 perft 2 755
 perft 3 20596
@@ -6986,7 +6986,7 @@ perft 5 17164382
 perft 6 510878835
 
 id 776
-epd qrkbb1r1/ppp1pnpp/3p2n1/5p2/1P3P2/2Q3N1/P1PPP1PP/1RKBB1RN w GBgb - 0 9
+epd qrkbb1r1/ppp1pnpp/3p2n1/5p2/1P3P2/2Q3N1/P1PPP1PP/1RKBB1RN w GBgb -
 perft 1 35
 perft 2 918
 perft 3 32244
@@ -6995,7 +6995,7 @@ perft 5 30933394
 perft 6 867833733
 
 id 777
-epd qrknbbrn/ppp1ppp1/8/7p/2Bp4/4PPP1/PPPP3P/QRKNB1RN w GBgb - 0 9
+epd qrknbbrn/ppp1ppp1/8/7p/2Bp4/4PPP1/PPPP3P/QRKNB1RN w GBgb -
 perft 1 27
 perft 2 593
 perft 3 16168
@@ -7004,7 +7004,7 @@ perft 5 10422676
 perft 6 258348640
 
 id 778
-epd qrk1brnb/ppppp3/4n2p/5pp1/2PP4/2N4P/PP2PPP1/QRK1BRNB w FBfb - 2 9
+epd qrk1brnb/ppppp3/4n2p/5pp1/2PP4/2N4P/PP2PPP1/QRK1BRNB w FBfb -
 perft 1 24
 perft 2 672
 perft 3 17447
@@ -7013,7 +7013,7 @@ perft 5 13765777
 perft 6 414930519
 
 id 779
-epd qbrknrb1/p2ppppp/2p3n1/8/p4P2/6PP/1PPPP3/QBRKNRBN w FCfc - 0 9
+epd qbrknrb1/p2ppppp/2p3n1/8/p4P2/6PP/1PPPP3/QBRKNRBN w FCfc -
 perft 1 29
 perft 2 759
 perft 3 23235
@@ -7022,7 +7022,7 @@ perft 5 20416668
 perft 6 584870558
 
 id 780
-epd 1rkb1rbn/p1pp1ppp/3np3/1p6/4qP2/3NB3/PPPPPRPP/QRKB3N w Bfb - 0 9
+epd 1rkb1rbn/p1pp1ppp/3np3/1p6/4qP2/3NB3/PPPPPRPP/QRKB3N w Bfb -
 perft 1 22
 perft 2 923
 perft 3 22585
@@ -7031,7 +7031,7 @@ perft 5 24049880
 perft 6 957218571
 
 id 781
-epd 1rknrbbn/p1pp1p1p/8/1p2p1p1/4qPP1/2P5/PP1PP1BP/QRKNR1BN w EBeb - 0 9
+epd 1rknrbbn/p1pp1p1p/8/1p2p1p1/4qPP1/2P5/PP1PP1BP/QRKNR1BN w EBeb -
 perft 1 28
 perft 2 1309
 perft 3 36355
@@ -7040,7 +7040,7 @@ perft 5 44576409
 perft 6 1846382333
 
 id 782
-epd qrk1rn1b/ppppp2p/4n3/3b1pp1/4P2P/5BP1/PPPP1P2/QRKNRNB1 w EBeb - 3 9
+epd qrk1rn1b/ppppp2p/4n3/3b1pp1/4P2P/5BP1/PPPP1P2/QRKNRNB1 w EBeb -
 perft 1 26
 perft 2 839
 perft 3 22189
@@ -7049,7 +7049,7 @@ perft 5 19978260
 perft 6 661207281
 
 id 783
-epd bbrqk1rn/pp1ppppp/8/2p5/2P1P3/5n1P/PPBP1PP1/B1RQKNRN w GCgc - 1 9
+epd bbrqk1rn/pp1ppppp/8/2p5/2P1P3/5n1P/PPBP1PP1/B1RQKNRN w GCgc -
 perft 1 3
 perft 2 95
 perft 3 2690
@@ -7058,7 +7058,7 @@ perft 5 2518864
 perft 6 80775549
 
 id 784
-epd brqbk2n/pppppprp/8/6p1/1P3n2/5P2/P1PPP1PP/R1QBKNRN w Gb - 2 9
+epd brqbk2n/pppppprp/8/6p1/1P3n2/5P2/P1PPP1PP/R1QBKNRN w Gb -
 perft 1 22
 perft 2 593
 perft 3 13255
@@ -7067,7 +7067,7 @@ perft 5 8922397
 perft 6 253271592
 
 id 785
-epd brqknbr1/pp3ppp/3p2n1/2p1p3/2P5/5P2/PPKPP1PP/BRQ1NBRN w gb - 0 9
+epd brqknbr1/pp3ppp/3p2n1/2p1p3/2P5/5P2/PPKPP1PP/BRQ1NBRN w gb -
 perft 1 21
 perft 2 590
 perft 3 13190
@@ -7076,7 +7076,7 @@ perft 5 9581695
 perft 6 304103516
 
 id 786
-epd 1rqknrnb/2pp1ppp/p3p3/1p6/P2P4/5bP1/1PP1PP1P/BRQKNRNB w FBfb - 0 9
+epd 1rqknrnb/2pp1ppp/p3p3/1p6/P2P4/5bP1/1PP1PP1P/BRQKNRNB w FBfb -
 perft 1 24
 perft 2 737
 perft 3 20052
@@ -7085,7 +7085,7 @@ perft 5 17948681
 perft 6 536330341
 
 id 787
-epd rbb1k1rn/p1pqpppp/6n1/1p1p4/5P2/3PP3/PPP1K1PP/RBBQ1NRN w ga - 3 9
+epd rbb1k1rn/p1pqpppp/6n1/1p1p4/5P2/3PP3/PPP1K1PP/RBBQ1NRN w ga -
 perft 1 24
 perft 2 694
 perft 3 16773
@@ -7094,7 +7094,7 @@ perft 5 13094823
 perft 6 419402704
 
 id 788
-epd rqbbknr1/1ppp2pp/p5n1/4pp2/P7/1PP5/1Q1PPPPP/R1BBKNRN w GAga - 0 9
+epd rqbbknr1/1ppp2pp/p5n1/4pp2/P7/1PP5/1Q1PPPPP/R1BBKNRN w GAga -
 perft 1 24
 perft 2 600
 perft 3 15347
@@ -7103,7 +7103,7 @@ perft 5 11029596
 perft 6 308553169
 
 id 789
-epd rqbknbrn/2pppppp/6Q1/pp6/8/2P5/PP1PPPPP/R1BKNBRN w GAga - 2 9
+epd rqbknbrn/2pppppp/6Q1/pp6/8/2P5/PP1PPPPP/R1BKNBRN w GAga -
 perft 1 40
 perft 2 949
 perft 3 34100
@@ -7112,7 +7112,7 @@ perft 5 31296485
 perft 6 881529007
 
 id 790
-epd rqbknr1b/pp1ppp2/2p2n1p/6p1/8/3P1PPP/PPP1P3/RQBKNRNB w FAfa - 0 9
+epd rqbknr1b/pp1ppp2/2p2n1p/6p1/8/3P1PPP/PPP1P3/RQBKNRNB w FAfa -
 perft 1 20
 perft 2 560
 perft 3 12275
@@ -7121,7 +7121,7 @@ perft 5 8687544
 perft 6 277906201
 
 id 791
-epd rbqkbnrn/p3pppp/1p6/3p4/P1p3P1/1P6/1QPPPP1P/RB1KBNRN w GAga - 0 9
+epd rbqkbnrn/p3pppp/1p6/3p4/P1p3P1/1P6/1QPPPP1P/RB1KBNRN w GAga -
 perft 1 30
 perft 2 1155
 perft 3 35865
@@ -7130,7 +7130,7 @@ perft 5 43092716
 perft 6 1614019629
 
 id 792
-epd rqkbb1rn/p1p1pppn/1p1p4/7p/4PP2/7P/PPPPB1P1/RQK1BNRN w GAga - 1 9
+epd rqkbb1rn/p1p1pppn/1p1p4/7p/4PP2/7P/PPPPB1P1/RQK1BNRN w GAga -
 perft 1 30
 perft 2 701
 perft 3 20804
@@ -7139,7 +7139,7 @@ perft 5 15450970
 perft 6 401499189
 
 id 793
-epd rqknbbrn/1p2pp1p/3p2p1/p1p5/P2P4/1P6/1KP1PPPP/RQ1NBBRN w ga - 0 9
+epd rqknbbrn/1p2pp1p/3p2p1/p1p5/P2P4/1P6/1KP1PPPP/RQ1NBBRN w ga -
 perft 1 28
 perft 2 756
 perft 3 21655
@@ -7148,7 +7148,7 @@ perft 5 17989811
 perft 6 525585996
 
 id 794
-epd rqknbrnb/1pp3pp/5p2/p2pp3/P7/3PPN2/1PP2PPP/RQKNBR1B w FAfa - 0 9
+epd rqknbrnb/1pp3pp/5p2/p2pp3/P7/3PPN2/1PP2PPP/RQKNBR1B w FAfa -
 perft 1 26
 perft 2 731
 perft 3 19509
@@ -7157,7 +7157,7 @@ perft 5 15209404
 perft 6 439767476
 
 id 795
-epd rbqkr1bn/p1pppp1p/1p1n4/6p1/7P/3P1PP1/PPP1P3/RBQKNRBN w FAa - 0 9
+epd rbqkr1bn/p1pppp1p/1p1n4/6p1/7P/3P1PP1/PPP1P3/RBQKNRBN w FAa -
 perft 1 27
 perft 2 586
 perft 3 16282
@@ -7166,7 +7166,7 @@ perft 5 10905865
 perft 6 274364342
 
 id 796
-epd rqk1nrb1/ppbp1ppp/4p1n1/2p5/7P/1PP5/P2PPPP1/RQKBNRBN w FAfa - 1 9
+epd rqk1nrb1/ppbp1ppp/4p1n1/2p5/7P/1PP5/P2PPPP1/RQKBNRBN w FAfa -
 perft 1 27
 perft 2 749
 perft 3 21480
@@ -7175,7 +7175,7 @@ perft 5 18084787
 perft 6 520547029
 
 id 797
-epd rqknrbbn/pp1p1ppp/4p3/2p5/3P2P1/7P/PPP1PP2/RQKNRBBN w EAa - 0 9
+epd rqknrbbn/pp1p1ppp/4p3/2p5/3P2P1/7P/PPP1PP2/RQKNRBBN w EAa -
 perft 1 20
 perft 2 533
 perft 3 11829
@@ -7184,7 +7184,7 @@ perft 5 8230417
 perft 6 245871540
 
 id 798
-epd rqknrnbb/pp1ppp1p/2p3p1/8/8/1P2P1NP/P1PP1PP1/RQKNR1BB w EAea - 0 9
+epd rqknrnbb/pp1ppp1p/2p3p1/8/8/1P2P1NP/P1PP1PP1/RQKNR1BB w EAea -
 perft 1 22
 perft 2 633
 perft 3 14480
@@ -7193,7 +7193,7 @@ perft 5 10827868
 perft 6 343525739
 
 id 799
-epd 1brkq1rn/2pppppp/1p2n3/p2bN3/8/7P/PPPPPPP1/BBRKQ1RN w GCgc - 2 9
+epd 1brkq1rn/2pppppp/1p2n3/p2bN3/8/7P/PPPPPPP1/BBRKQ1RN w GCgc -
 perft 1 27
 perft 2 748
 perft 3 20134
@@ -7202,7 +7202,7 @@ perft 5 16010135
 perft 6 475206624
 
 id 800
-epd brkbqnrn/2pp1ppp/8/1p2p3/Pp2N3/8/2PPPPPP/BRKBQNR1 w GBgb - 0 9
+epd brkbqnrn/2pp1ppp/8/1p2p3/Pp2N3/8/2PPPPPP/BRKBQNR1 w GBgb -
 perft 1 30
 perft 2 827
 perft 3 25308
@@ -7211,7 +7211,7 @@ perft 5 23746165
 perft 6 751690068
 
 id 801
-epd brk1nbrn/pp1ppppp/2p5/7P/5P2/q2P4/PPP1P1P1/BRKQNBRN w GBgb - 1 9
+epd brk1nbrn/pp1ppppp/2p5/7P/5P2/q2P4/PPP1P1P1/BRKQNBRN w GBgb -
 perft 1 15
 perft 2 471
 perft 3 8716
@@ -7220,7 +7220,7 @@ perft 5 5960901
 perft 6 190316951
 
 id 802
-epd brkqnrnb/1p1pp1p1/p4p2/2p4p/8/P2PP3/1PP1QPPP/BRK1NRNB w FBfb - 0 9
+epd brkqnrnb/1p1pp1p1/p4p2/2p4p/8/P2PP3/1PP1QPPP/BRK1NRNB w FBfb -
 perft 1 24
 perft 2 479
 perft 3 12584
@@ -7229,7 +7229,7 @@ perft 5 7830230
 perft 6 190419716
 
 id 803
-epd rbbkqnrn/2ppp2p/pp3p2/6p1/P6P/8/RPPPPPP1/1BBKQNRN w Gga - 0 9
+epd rbbkqnrn/2ppp2p/pp3p2/6p1/P6P/8/RPPPPPP1/1BBKQNRN w Gga -
 perft 1 21
 perft 2 523
 perft 3 12125
@@ -7238,7 +7238,7 @@ perft 5 8322614
 perft 6 242240658
 
 id 804
-epd rkbbqr1n/1ppppppn/7p/p7/4P3/2P2P2/PP1PB1PP/RKB1QNRN w GAa - 3 9
+epd rkbbqr1n/1ppppppn/7p/p7/4P3/2P2P2/PP1PB1PP/RKB1QNRN w GAa -
 perft 1 27
 perft 2 563
 perft 3 16026
@@ -7247,7 +7247,7 @@ perft 5 11105151
 perft 6 283211800
 
 id 805
-epd rkbqnbrn/ppppp3/8/5ppp/2P3P1/7P/PPQPPP2/RKB1NBRN w GAga - 0 9
+epd rkbqnbrn/ppppp3/8/5ppp/2P3P1/7P/PPQPPP2/RKB1NBRN w GAga -
 perft 1 28
 perft 2 639
 perft 3 19250
@@ -7256,7 +7256,7 @@ perft 5 14872172
 perft 6 384663405
 
 id 806
-epd rkb1nrnb/pppp1pp1/5q1p/8/P3p3/4R1P1/1PPPPP1P/1KBQNRNB w Ffa - 0 9
+epd rkb1nrnb/pppp1pp1/5q1p/8/P3p3/4R1P1/1PPPPP1P/1KBQNRNB w Ffa -
 perft 1 28
 perft 2 873
 perft 3 23690
@@ -7265,7 +7265,7 @@ perft 5 20209424
 perft 6 625281937
 
 id 807
-epd rbkqb1rn/1p1ppppp/4n3/p1p5/8/3PBP2/PPP1P1PP/RBKQ1NRN w GAga - 0 9
+epd rbkqb1rn/1p1ppppp/4n3/p1p5/8/3PBP2/PPP1P1PP/RBKQ1NRN w GAga -
 perft 1 26
 perft 2 798
 perft 3 21416
@@ -7274,7 +7274,7 @@ perft 5 18475618
 perft 6 591681956
 
 id 808
-epd rk1qbnrn/1p1ppppp/1b6/p1p5/P7/2P3NP/1P1PPPP1/RKQBB1RN w GAga - 0 9
+epd rk1qbnrn/1p1ppppp/1b6/p1p5/P7/2P3NP/1P1PPPP1/RKQBB1RN w GAga -
 perft 1 22
 perft 2 506
 perft 3 12313
@@ -7283,7 +7283,7 @@ perft 5 7891676
 perft 6 205739580
 
 id 809
-epd rk1nbbrn/ppp1ppp1/8/3p3p/1P1P2q1/5PB1/P1P1P1PP/RKQN1BRN w GAga - 1 9
+epd rk1nbbrn/ppp1ppp1/8/3p3p/1P1P2q1/5PB1/P1P1P1PP/RKQN1BRN w GAga -
 perft 1 31
 perft 2 956
 perft 3 29219
@@ -7292,7 +7292,7 @@ perft 5 27827461
 perft 6 876341492
 
 id 810
-epd rkqnbr1b/pp1pppp1/7p/2p2n2/P2P4/7N/RPP1PPPP/1KQNBR1B w Ffa - 0 9
+epd rkqnbr1b/pp1pppp1/7p/2p2n2/P2P4/7N/RPP1PPPP/1KQNBR1B w Ffa -
 perft 1 31
 perft 2 750
 perft 3 24267
@@ -7301,7 +7301,7 @@ perft 5 21639104
 perft 6 617064197
 
 id 811
-epd rbkq1rbn/2p1pppp/pp3n2/3p4/5P2/3N2N1/PPPPP1PP/RBKQR1B1 w Afa - 2 9
+epd rbkq1rbn/2p1pppp/pp3n2/3p4/5P2/3N2N1/PPPPP1PP/RBKQR1B1 w Afa -
 perft 1 26
 perft 2 647
 perft 3 18027
@@ -7310,7 +7310,7 @@ perft 5 13643783
 perft 6 369702807
 
 id 812
-epd rkqbr1bn/p2ppppp/1pp2n2/8/5P2/3P1N2/PPP1PRPP/RKQB2BN w Aa - 3 9
+epd rkqbr1bn/p2ppppp/1pp2n2/8/5P2/3P1N2/PPP1PRPP/RKQB2BN w Aa -
 perft 1 24
 perft 2 574
 perft 3 14593
@@ -7319,7 +7319,7 @@ perft 5 10066892
 perft 6 271121237
 
 id 813
-epd rk1qrbbn/p1ppp1pp/1p2n3/5p2/1P6/K3N3/P1PPPPPP/R1Q1RBBN w ea - 0 9
+epd rk1qrbbn/p1ppp1pp/1p2n3/5p2/1P6/K3N3/P1PPPPPP/R1Q1RBBN w ea -
 perft 1 25
 perft 2 548
 perft 3 14069
@@ -7328,7 +7328,7 @@ perft 5 9043111
 perft 6 235545764
 
 id 814
-epd rkqnrnbb/pp1pp3/2p5/5ppp/8/PP4NP/2PPPPP1/RKQNR1BB w EAea - 0 9
+epd rkqnrnbb/pp1pp3/2p5/5ppp/8/PP4NP/2PPPPP1/RKQNR1BB w EAea -
 perft 1 23
 perft 2 727
 perft 3 18228
@@ -7337,7 +7337,7 @@ perft 5 15078056
 perft 6 471296844
 
 id 815
-epd bbrknq1r/ppppppp1/8/7p/5n2/3P4/PPP1PNPP/BBKRNQR1 w c - 0 9
+epd bbrknq1r/ppppppp1/8/7p/5n2/3P4/PPP1PNPP/BBKRNQR1 w c -
 perft 1 21
 perft 2 610
 perft 3 13300
@@ -7346,7 +7346,7 @@ perft 5 9605845
 perft 6 293532398
 
 id 816
-epd brkbnqr1/2pppnpp/pp3p2/8/4PPPP/8/PPPP4/BRKBNQRN w GBgb - 1 9
+epd brkbnqr1/2pppnpp/pp3p2/8/4PPPP/8/PPPP4/BRKBNQRN w GBgb -
 perft 1 30
 perft 2 757
 perft 3 23908
@@ -7355,7 +7355,7 @@ perft 5 20360394
 perft 6 548380577
 
 id 817
-epd brk1qb1n/ppppppr1/2n3pp/8/2P3P1/2N5/PP1PPP1P/BR1KQBRN w b - 1 9
+epd brk1qb1n/ppppppr1/2n3pp/8/2P3P1/2N5/PP1PPP1P/BR1KQBRN w b -
 perft 1 26
 perft 2 570
 perft 3 15537
@@ -7364,7 +7364,7 @@ perft 5 10081351
 perft 6 242864559
 
 id 818
-epd brknq1nb/pp2prpp/8/2pP1p2/6P1/2N5/PPPP1P1P/BRK1QRNB w FBb - 1 9
+epd brknq1nb/pp2prpp/8/2pP1p2/6P1/2N5/PPPP1P1P/BRK1QRNB w FBb -
 perft 1 33
 perft 2 830
 perft 3 27897
@@ -7373,7 +7373,7 @@ perft 5 26262884
 perft 6 765831403
 
 id 819
-epd rbbk1qrn/ppp1p1pp/5p2/3p1n2/7N/P7/1PPPPPPP/RBB1KQRN w ga - 0 9
+epd rbbk1qrn/ppp1p1pp/5p2/3p1n2/7N/P7/1PPPPPPP/RBB1KQRN w ga -
 perft 1 21
 perft 2 562
 perft 3 13060
@@ -7382,7 +7382,7 @@ perft 5 9520963
 perft 6 290579255
 
 id 820
-epd rk1b1qrn/ppp1pppp/5n2/3pN3/P6P/7b/1PPPPPP1/RKBB1QRN w GAga - 4 9
+epd rk1b1qrn/ppp1pppp/5n2/3pN3/P6P/7b/1PPPPPP1/RKBB1QRN w GAga -
 perft 1 28
 perft 2 677
 perft 3 19235
@@ -7391,7 +7391,7 @@ perft 5 14354779
 perft 6 383207197
 
 id 821
-epd rkbnqbrn/pp1ppp1p/2p5/6p1/P7/4P3/KPPPQPPP/R1BN1BRN w - - 3 9
+epd rkbnqbrn/pp1ppp1p/2p5/6p1/P7/4P3/KPPPQPPP/R1BN1BRN w - -
 perft 1 28
 perft 2 585
 perft 3 17443
@@ -7400,7 +7400,7 @@ perft 5 12574541
 perft 6 310495538
 
 id 822
-epd rk1nqrnb/pbpppp2/1p4p1/7p/P7/5NP1/1PPPPPBP/RKBNQR2 w FAfa - 2 9
+epd rk1nqrnb/pbpppp2/1p4p1/7p/P7/5NP1/1PPPPPBP/RKBNQR2 w FAfa -
 perft 1 26
 perft 2 774
 perft 3 21626
@@ -7409,7 +7409,7 @@ perft 5 19093408
 perft 6 576325868
 
 id 823
-epd rbknb1rn/p1pp2pp/1p6/4pp2/1q3P1B/2N5/PPPPPNPP/RBK2QR1 w GAga - 2 9
+epd rbknb1rn/p1pp2pp/1p6/4pp2/1q3P1B/2N5/PPPPPNPP/RBK2QR1 w GAga -
 perft 1 31
 perft 2 1206
 perft 3 36940
@@ -7418,7 +7418,7 @@ perft 5 42849564
 perft 6 1555711209
 
 id 824
-epd rk1bbqrn/pp1pp1pp/3n4/5p2/3p4/1PP5/PK2PPPP/R1NBBQRN w ga - 0 9
+epd rk1bbqrn/pp1pp1pp/3n4/5p2/3p4/1PP5/PK2PPPP/R1NBBQRN w ga -
 perft 1 21
 perft 2 629
 perft 3 14059
@@ -7427,7 +7427,7 @@ perft 5 10587910
 perft 6 332632033
 
 id 825
-epd rknqbbr1/p1pp1pp1/1p4n1/4p2p/4P1P1/6RB/PPPP1P1P/RKNQB2N w Aga - 0 9
+epd rknqbbr1/p1pp1pp1/1p4n1/4p2p/4P1P1/6RB/PPPP1P1P/RKNQB2N w Aga -
 perft 1 27
 perft 2 753
 perft 3 20918
@@ -7436,7 +7436,7 @@ perft 5 17318772
 perft 6 507563675
 
 id 826
-epd rknqbr1b/pppp1ppp/4p2n/8/1P3P2/4P3/P1PPN1PP/RKNQBR1B w FAfa - 2 9
+epd rknqbr1b/pppp1ppp/4p2n/8/1P3P2/4P3/P1PPN1PP/RKNQBR1B w FAfa -
 perft 1 26
 perft 2 623
 perft 3 17177
@@ -7445,7 +7445,7 @@ perft 5 13389799
 perft 6 383508368
 
 id 827
-epd r2kqrbn/bppppppp/2n5/p4B2/5P2/2P5/PP1PP1PP/1RKNQRBN w F - 2 9
+epd r2kqrbn/bppppppp/2n5/p4B2/5P2/2P5/PP1PP1PP/1RKNQRBN w F -
 perft 1 39
 perft 2 1026
 perft 3 37800
@@ -7454,7 +7454,7 @@ perft 5 35946987
 perft 6 992756232
 
 id 828
-epd rk1bqrb1/ppppppp1/1n6/7p/2P2P1n/4P1Q1/PP1P2PP/RKNB1RBN w FAfa - 0 9
+epd rk1bqrb1/ppppppp1/1n6/7p/2P2P1n/4P1Q1/PP1P2PP/RKNB1RBN w FAfa -
 perft 1 35
 perft 2 760
 perft 3 25817
@@ -7463,7 +7463,7 @@ perft 5 21014787
 perft 6 536852043
 
 id 829
-epd rkq1rb1n/ppppp1pp/1n6/5p2/PPb2P2/8/1KPPP1PP/R1NQRBBN w ea - 1 9
+epd rkq1rb1n/ppppp1pp/1n6/5p2/PPb2P2/8/1KPPP1PP/R1NQRBBN w ea -
 perft 1 27
 perft 2 754
 perft 3 21009
@@ -7472,7 +7472,7 @@ perft 5 16461795
 perft 6 448313956
 
 id 830
-epd rknqr2b/pppnp1pp/3p4/3b1p2/8/1N1P2N1/PPP1PPPP/RKQ1R1BB w EAea - 1 9
+epd rknqr2b/pppnp1pp/3p4/3b1p2/8/1N1P2N1/PPP1PPPP/RKQ1R1BB w EAea -
 perft 1 27
 perft 2 803
 perft 3 23708
@@ -7481,7 +7481,7 @@ perft 5 21875031
 perft 6 654754840
 
 id 831
-epd bbrknrqn/ppppp1pB/8/2P2p1p/8/5N2/PP1PPPPP/B1RK1RQN w FCfc - 0 9
+epd bbrknrqn/ppppp1pB/8/2P2p1p/8/5N2/PP1PPPPP/B1RK1RQN w FCfc -
 perft 1 30
 perft 2 799
 perft 3 23923
@@ -7490,7 +7490,7 @@ perft 5 20532790
 perft 6 603059376
 
 id 832
-epd brkbnrq1/1pppp1p1/6np/p4p2/4P3/1PP5/P1KP1PPP/BR1BNRQN w fb - 1 9
+epd brkbnrq1/1pppp1p1/6np/p4p2/4P3/1PP5/P1KP1PPP/BR1BNRQN w fb -
 perft 1 27
 perft 2 726
 perft 3 19329
@@ -7499,7 +7499,7 @@ perft 5 15156662
 perft 6 457601127
 
 id 833
-epd brknrbq1/1p1p1ppp/p3p1n1/2p5/8/1P1BPP2/P1PP2PP/BRKNR1QN w EBeb - 0 9
+epd brknrbq1/1p1p1ppp/p3p1n1/2p5/8/1P1BPP2/P1PP2PP/BRKNR1QN w EBeb -
 perft 1 36
 perft 2 786
 perft 3 27868
@@ -7508,7 +7508,7 @@ perft 5 22852433
 perft 6 577223409
 
 id 834
-epd brknrqnb/p2ppp1p/2p5/1p6/3P2p1/P1P1N3/1P2PPPP/BRK1RQNB w EBeb - 0 9
+epd brknrqnb/p2ppp1p/2p5/1p6/3P2p1/P1P1N3/1P2PPPP/BRK1RQNB w EBeb -
 perft 1 23
 perft 2 649
 perft 3 15169
@@ -7517,7 +7517,7 @@ perft 5 10687843
 perft 6 320881984
 
 id 835
-epd rbbk1rqn/1ppppppp/3n4/p7/2P5/3N4/PP1PPPPP/RBB1KRQN w fa - 1 9
+epd rbbk1rqn/1ppppppp/3n4/p7/2P5/3N4/PP1PPPPP/RBB1KRQN w fa -
 perft 1 20
 perft 2 478
 perft 3 11094
@@ -7526,7 +7526,7 @@ perft 5 7094988
 perft 6 185488058
 
 id 836
-epd rkbbnrqn/p2p1ppp/1p2p3/8/P1p1P3/1BP5/1P1P1PPP/RKB1NRQN w FAfa - 0 9
+epd rkbbnrqn/p2p1ppp/1p2p3/8/P1p1P3/1BP5/1P1P1PPP/RKB1NRQN w FAfa -
 perft 1 22
 perft 2 570
 perft 3 13295
@@ -7535,7 +7535,7 @@ perft 5 8671852
 perft 6 229898448
 
 id 837
-epd rkb1rb1n/ppppppqp/8/2n3p1/2P1P1P1/8/PP1P1P1P/RKBNRBQN w EAea - 1 9
+epd rkb1rb1n/ppppppqp/8/2n3p1/2P1P1P1/8/PP1P1P1P/RKBNRBQN w EAea -
 perft 1 23
 perft 2 663
 perft 3 16212
@@ -7544,7 +7544,7 @@ perft 5 12900485
 perft 6 404944553
 
 id 838
-epd rkb1rqnb/pppp3p/2n3p1/4pp2/P2P3P/2P5/1P2PPP1/RKBNRQNB w EAea - 0 9
+epd rkb1rqnb/pppp3p/2n3p1/4pp2/P2P3P/2P5/1P2PPP1/RKBNRQNB w EAea -
 perft 1 25
 perft 2 845
 perft 3 22188
@@ -7553,7 +7553,7 @@ perft 5 20276176
 perft 6 683290790
 
 id 839
-epd rbk1brqn/ppp1pppp/8/3p4/7P/1P4P1/2PPPP2/RBKNBRQN w FAfa - 0 9
+epd rbk1brqn/ppp1pppp/8/3p4/7P/1P4P1/2PPPP2/RBKNBRQN w FAfa -
 perft 1 24
 perft 2 526
 perft 3 13862
@@ -7562,7 +7562,7 @@ perft 5 9054028
 perft 6 222704171
 
 id 840
-epd rknbbrqn/pp3pp1/4p3/2pp3p/2P5/8/PPBPPPPP/RKN1BRQN w FAfa - 0 9
+epd rknbbrqn/pp3pp1/4p3/2pp3p/2P5/8/PPBPPPPP/RKN1BRQN w FAfa -
 perft 1 26
 perft 2 756
 perft 3 19280
@@ -7571,7 +7571,7 @@ perft 5 14697705
 perft 6 433719427
 
 id 841
-epd 1knrbbqn/rp1p1ppp/p3p3/2p5/8/5P1P/PPPPP1P1/RKNRBBQN w DAd - 0 9
+epd 1knrbbqn/rp1p1ppp/p3p3/2p5/8/5P1P/PPPPP1P1/RKNRBBQN w DAd -
 perft 1 26
 perft 2 539
 perft 3 15194
@@ -7580,7 +7580,7 @@ perft 5 10223443
 perft 6 248715580
 
 id 842
-epd rknr1qnb/ppp1p1pp/3p2b1/8/4p3/1P3P1P/P1PP2P1/RKNRBQNB w DAda - 0 9
+epd rknr1qnb/ppp1p1pp/3p2b1/8/4p3/1P3P1P/P1PP2P1/RKNRBQNB w DAda -
 perft 1 25
 perft 2 701
 perft 3 18969
@@ -7589,7 +7589,7 @@ perft 5 16047041
 perft 6 496340789
 
 id 843
-epd rbk1r1bn/ppppp1pp/4n3/5p2/1P3P2/4N2P/PqPPP1P1/RBK1RQBN w EAea - 1 9
+epd rbk1r1bn/ppppp1pp/4n3/5p2/1P3P2/4N2P/PqPPP1P1/RBK1RQBN w EAea -
 perft 1 2
 perft 2 60
 perft 3 1319
@@ -7598,7 +7598,7 @@ perft 5 1017864
 perft 6 33183408
 
 id 844
-epd r1nbrqbn/k1ppp1pp/1p6/p4p2/2P5/6PQ/PP1PPP1P/RKNBR1BN w EA - 0 9
+epd r1nbrqbn/k1ppp1pp/1p6/p4p2/2P5/6PQ/PP1PPP1P/RKNBR1BN w EA -
 perft 1 27
 perft 2 699
 perft 3 20436
@@ -7607,7 +7607,7 @@ perft 5 17192121
 perft 6 499247248
 
 id 845
-epd rknrqbbn/1pp1pp2/p5p1/3p3p/6P1/PN5P/1PPPPP2/RK1RQBBN w DAda - 0 9
+epd rknrqbbn/1pp1pp2/p5p1/3p3p/6P1/PN5P/1PPPPP2/RK1RQBBN w DAda -
 perft 1 23
 perft 2 611
 perft 3 15515
@@ -7616,7 +7616,7 @@ perft 5 11917036
 perft 6 352885930
 
 id 846
-epd rknrqn1b/p1pp1ppb/8/1p2p1Qp/3P4/3N4/PPP1PPPP/RK1R1NBB w DAda - 0 9
+epd rknrqn1b/p1pp1ppb/8/1p2p1Qp/3P4/3N4/PPP1PPPP/RK1R1NBB w DAda -
 perft 1 45
 perft 2 1170
 perft 3 48283
@@ -7625,7 +7625,7 @@ perft 5 52213677
 perft 6 1500007485
 
 id 847
-epd bbkrnrnq/p2p1ppp/2p1p3/1p6/1P2Q3/6P1/P1PPPP1P/BBKRNRN1 w - - 0 9
+epd bbkrnrnq/p2p1ppp/2p1p3/1p6/1P2Q3/6P1/P1PPPP1P/BBKRNRN1 w - -
 perft 1 41
 perft 2 1035
 perft 3 39895
@@ -7634,7 +7634,7 @@ perft 5 38555608
 perft 6 1037686769
 
 id 848
-epd brkbnr2/1ppppp1p/7n/p5N1/P2q4/8/1PPPPPPP/BRKBNRQ1 w FBfb - 1 9
+epd brkbnr2/1ppppp1p/7n/p5N1/P2q4/8/1PPPPPPP/BRKBNRQ1 w FBfb -
 perft 1 22
 perft 2 869
 perft 3 19234
@@ -7643,7 +7643,7 @@ perft 5 16453359
 perft 6 567287944
 
 id 849
-epd brknrbnq/p1ppppp1/1p6/7p/2PP4/5P2/PPK1P1PP/BR1NRBNQ w eb - 1 9
+epd brknrbnq/p1ppppp1/1p6/7p/2PP4/5P2/PPK1P1PP/BR1NRBNQ w eb -
 perft 1 23
 perft 2 641
 perft 3 14748
@@ -7652,7 +7652,7 @@ perft 5 10192718
 perft 6 302864305
 
 id 850
-epd brk1r1qb/pp1ppnpp/2p2pn1/8/6N1/2N3P1/PPPPPP1P/BRK1R1QB w EBeb - 3 9
+epd brk1r1qb/pp1ppnpp/2p2pn1/8/6N1/2N3P1/PPPPPP1P/BRK1R1QB w EBeb -
 perft 1 32
 perft 2 863
 perft 3 28379
@@ -7661,7 +7661,7 @@ perft 5 25848794
 perft 6 720443112
 
 id 851
-epd rbbk1rnq/pppp1pp1/4p2p/8/3P2n1/4BN1P/PPP1PPP1/RB1K1RNQ w FAfa - 3 9
+epd rbbk1rnq/pppp1pp1/4p2p/8/3P2n1/4BN1P/PPP1PPP1/RB1K1RNQ w FAfa -
 perft 1 26
 perft 2 628
 perft 3 16151
@@ -7670,7 +7670,7 @@ perft 5 11237919
 perft 6 300314373
 
 id 852
-epd rkbbnr1q/p1pppppp/5n2/1p5B/PP6/4P3/2PP1PPP/RKB1NRNQ w FAfa - 0 9
+epd rkbbnr1q/p1pppppp/5n2/1p5B/PP6/4P3/2PP1PPP/RKB1NRNQ w FAfa -
 perft 1 30
 perft 2 692
 perft 3 21036
@@ -7679,7 +7679,7 @@ perft 5 16025428
 perft 6 420887328
 
 id 853
-epd rkb1rbnq/1pppp1pp/5p2/p7/5n1P/1PN3P1/P1PPPP2/RKB1RBNQ w EAea - 0 9
+epd rkb1rbnq/1pppp1pp/5p2/p7/5n1P/1PN3P1/P1PPPP2/RKB1RBNQ w EAea -
 perft 1 32
 perft 2 825
 perft 3 27130
@@ -7688,7 +7688,7 @@ perft 5 23593363
 perft 6 622249676
 
 id 854
-epd rkbnrnqb/1ppp1p1p/p5p1/4p3/4P3/2N2P2/PPPP2PP/RKBR1NQB w Aea - 0 9
+epd rkbnrnqb/1ppp1p1p/p5p1/4p3/4P3/2N2P2/PPPP2PP/RKBR1NQB w Aea -
 perft 1 24
 perft 2 487
 perft 3 13300
@@ -7697,7 +7697,7 @@ perft 5 8782713
 perft 6 215787079
 
 id 855
-epd rbknbr1q/pppp2pp/4p3/5p1n/1P2P2N/8/P1PP1PPP/RBKNBR1Q w FAfa - 0 9
+epd rbknbr1q/pppp2pp/4p3/5p1n/1P2P2N/8/P1PP1PPP/RBKNBR1Q w FAfa -
 perft 1 23
 perft 2 571
 perft 3 13799
@@ -7706,7 +7706,7 @@ perft 5 9224232
 perft 6 257288920
 
 id 856
-epd rknbb1nq/pppppr2/5pp1/7p/8/1N4P1/PPPPPP1P/RK1BBRNQ w FAa - 2 9
+epd rknbb1nq/pppppr2/5pp1/7p/8/1N4P1/PPPPPP1P/RK1BBRNQ w FAa -
 perft 1 26
 perft 2 548
 perft 3 15618
@@ -7715,7 +7715,7 @@ perft 5 10587626
 perft 6 253006082
 
 id 857
-epd rknr1bnq/p2pp1pp/1p3p2/2p4b/6PP/2P2N2/PP1PPP2/RKNRBB1Q w DAda - 1 9
+epd rknr1bnq/p2pp1pp/1p3p2/2p4b/6PP/2P2N2/PP1PPP2/RKNRBB1Q w DAda -
 perft 1 25
 perft 2 502
 perft 3 13150
@@ -7724,7 +7724,7 @@ perft 5 7824941
 perft 6 175766730
 
 id 858
-epd rknrb1qb/ppp1pppp/3p4/8/4P1nP/2P5/PPKP1PP1/R1NRBNQB w da - 1 9
+epd rknrb1qb/ppp1pppp/3p4/8/4P1nP/2P5/PPKP1PP1/R1NRBNQB w da -
 perft 1 23
 perft 2 643
 perft 3 14849
@@ -7733,7 +7733,7 @@ perft 5 10507328
 perft 6 312096061
 
 id 859
-epd rbk1rnbq/pppp1npp/4p3/5p2/4P1P1/7P/PPPP1P1N/RBKNR1BQ w EAea - 1 9
+epd rbk1rnbq/pppp1npp/4p3/5p2/4P1P1/7P/PPPP1P1N/RBKNR1BQ w EAea -
 perft 1 24
 perft 2 591
 perft 3 15178
@@ -7742,7 +7742,7 @@ perft 5 10251465
 perft 6 263574861
 
 id 860
-epd rknbrnb1/p1pppp1p/1p6/3N2p1/P3q1P1/8/1PPPPP1P/RKNBR1BQ w EAea - 1 9
+epd rknbrnb1/p1pppp1p/1p6/3N2p1/P3q1P1/8/1PPPPP1P/RKNBR1BQ w EAea -
 perft 1 28
 perft 2 948
 perft 3 27343
@@ -7751,7 +7751,7 @@ perft 5 26241141
 perft 6 812343987
 
 id 861
-epd rknrn1b1/ppppppqp/8/6p1/2P5/2P1BP2/PP2P1PP/RKNRNB1Q w DAda - 1 9
+epd rknrn1b1/ppppppqp/8/6p1/2P5/2P1BP2/PP2P1PP/RKNRNB1Q w DAda -
 perft 1 31
 perft 2 807
 perft 3 24360
@@ -7760,7 +7760,7 @@ perft 5 20455205
 perft 6 588518645
 
 id 862
-epd 1k1rnqbb/npppppp1/r7/p2B3p/5P2/1N4P1/PPPPP2P/RK1RNQB1 w DAd - 0 9
+epd 1k1rnqbb/npppppp1/r7/p2B3p/5P2/1N4P1/PPPPP2P/RK1RNQB1 w DAd -
 perft 1 40
 perft 2 1122
 perft 3 44297
@@ -7769,7 +7769,7 @@ perft 5 48711073
 perft 6 1412437357
 
 id 863
-epd bbqr1rkn/pp1ppppp/8/2p5/1P2P1n1/7N/P1PP1P1P/BBQRKR1N w FD - 0 9
+epd bbqr1rkn/pp1ppppp/8/2p5/1P2P1n1/7N/P1PP1P1P/BBQRKR1N w FD -
 perft 1 26
 perft 2 841
 perft 3 22986
@@ -7778,7 +7778,7 @@ perft 5 21328001
 perft 6 705170410
 
 id 864
-epd bqkr1rnn/1ppp1ppp/p4b2/4p3/P7/3PP2N/1PP2PPP/BQRBKR1N w FC - 3 9
+epd bqkr1rnn/1ppp1ppp/p4b2/4p3/P7/3PP2N/1PP2PPP/BQRBKR1N w FC -
 perft 1 24
 perft 2 500
 perft 3 12802
@@ -7787,7 +7787,7 @@ perft 5 7928916
 perft 6 197806842
 
 id 865
-epd bqrkrbnn/1pp1ppp1/8/p6p/3p4/P3P2P/QPPP1PP1/B1RKRBNN w ECec - 0 9
+epd bqrkrbnn/1pp1ppp1/8/p6p/3p4/P3P2P/QPPP1PP1/B1RKRBNN w ECec -
 perft 1 31
 perft 2 592
 perft 3 18585
@@ -7796,7 +7796,7 @@ perft 5 12607528
 perft 6 298629240
 
 id 866
-epd bqkrrnnb/2p1pppp/p7/1P1p4/8/2R3P1/PP1PPP1P/BQ1KRNNB w E - 0 9
+epd bqkrrnnb/2p1pppp/p7/1P1p4/8/2R3P1/PP1PPP1P/BQ1KRNNB w E -
 perft 1 42
 perft 2 1124
 perft 3 45187
@@ -7805,7 +7805,7 @@ perft 5 50052573
 perft 6 1483524894
 
 id 867
-epd qbbrkrn1/p1pppn1p/8/1p3Pp1/2P5/8/PP1PPP1P/QBBRKRNN w FDfd - 0 9
+epd qbbrkrn1/p1pppn1p/8/1p3Pp1/2P5/8/PP1PPP1P/QBBRKRNN w FDfd -
 perft 1 21
 perft 2 577
 perft 3 13244
@@ -7814,7 +7814,7 @@ perft 5 9683808
 perft 6 300294295
 
 id 868
-epd qrbbkrnn/pp1p2pp/4p3/5p2/2p2P1P/2P5/PP1PP1P1/QRBBKRNN w FBfb - 0 9
+epd qrbbkrnn/pp1p2pp/4p3/5p2/2p2P1P/2P5/PP1PP1P1/QRBBKRNN w FBfb -
 perft 1 21
 perft 2 571
 perft 3 12736
@@ -7823,7 +7823,7 @@ perft 5 8239872
 perft 6 228837930
 
 id 869
-epd qrbkrbn1/1pp1pppp/p2p4/8/5PPn/2P5/PP1PP3/QRBKRBNN w EBeb - 0 9
+epd qrbkrbn1/1pp1pppp/p2p4/8/5PPn/2P5/PP1PP3/QRBKRBNN w EBeb -
 perft 1 18
 perft 2 466
 perft 3 9443
@@ -7832,7 +7832,7 @@ perft 5 5679073
 perft 6 162883949
 
 id 870
-epd qrb1rnnb/pp1p1ppp/2pk4/4p3/1P2P3/1R6/P1PP1PPP/Q1BKRNNB w E - 4 9
+epd qrb1rnnb/pp1p1ppp/2pk4/4p3/1P2P3/1R6/P1PP1PPP/Q1BKRNNB w E -
 perft 1 37
 perft 2 760
 perft 3 26863
@@ -7841,7 +7841,7 @@ perft 5 19486022
 perft 6 421740856
 
 id 871
-epd qbrkbrn1/p1pppp1p/6n1/1p4p1/1P6/5P2/P1PPPBPP/QBRK1RNN w FCfc - 1 9
+epd qbrkbrn1/p1pppp1p/6n1/1p4p1/1P6/5P2/P1PPPBPP/QBRK1RNN w FCfc -
 perft 1 33
 perft 2 824
 perft 3 27385
@@ -7850,7 +7850,7 @@ perft 5 25176664
 perft 6 734656217
 
 id 872
-epd qrkbbr2/2pppppp/5nn1/pp1Q4/P7/3P4/1PP1PPPP/1RKBBRNN w FBfb - 0 9
+epd qrkbbr2/2pppppp/5nn1/pp1Q4/P7/3P4/1PP1PPPP/1RKBBRNN w FBfb -
 perft 1 42
 perft 2 1147
 perft 3 44012
@@ -7859,7 +7859,7 @@ perft 5 48216013
 perft 6 1522548864
 
 id 873
-epd qrkrbbnn/pp2pp2/2pp2pp/1B6/P7/4P3/1PPP1PPP/QRKRB1NN w DBdb - 0 9
+epd qrkrbbnn/pp2pp2/2pp2pp/1B6/P7/4P3/1PPP1PPP/QRKRB1NN w DBdb -
 perft 1 26
 perft 2 464
 perft 3 12653
@@ -7868,7 +7868,7 @@ perft 5 6928220
 perft 6 142507795
 
 id 874
-epd qrkrbnnb/p1pp1pp1/1p5p/4p3/1P6/6PN/PKPPPP1P/QR1RBN1B w db - 0 9
+epd qrkrbnnb/p1pp1pp1/1p5p/4p3/1P6/6PN/PKPPPP1P/QR1RBN1B w db -
 perft 1 29
 perft 2 705
 perft 3 20000
@@ -7877,7 +7877,7 @@ perft 5 15055365
 perft 6 419552571
 
 id 875
-epd qbrkr1bn/p1p1pp1p/1p1p2n1/6p1/3P1P2/4P3/PPP3PP/QBKRRNBN w ec - 2 9
+epd qbrkr1bn/p1p1pp1p/1p1p2n1/6p1/3P1P2/4P3/PPP3PP/QBKRRNBN w ec -
 perft 1 23
 perft 2 613
 perft 3 14835
@@ -7886,7 +7886,7 @@ perft 5 10747407
 perft 6 323905533
 
 id 876
-epd qrk1rnb1/p1pp1ppp/1p2Bbn1/8/4P3/6P1/PPPP1P1P/QRK1RNBN w EBeb - 1 9
+epd qrk1rnb1/p1pp1ppp/1p2Bbn1/8/4P3/6P1/PPPP1P1P/QRK1RNBN w EBeb -
 perft 1 28
 perft 2 927
 perft 3 24887
@@ -7895,7 +7895,7 @@ perft 5 23063284
 perft 6 807913585
 
 id 877
-epd 1qkrnbbn/1rpppppp/pp6/5N2/P4P2/8/1PPPP1PP/QRKRNBB1 w DBd - 3 9
+epd 1qkrnbbn/1rpppppp/pp6/5N2/P4P2/8/1PPPP1PP/QRKRNBB1 w DBd -
 perft 1 30
 perft 2 542
 perft 3 16646
@@ -7904,7 +7904,7 @@ perft 5 10976745
 perft 6 251694423
 
 id 878
-epd qrkr2bb/pppppppp/8/1n2n3/1N5P/1P6/P1PPPPP1/QRKR1NBB w DBdb - 1 9
+epd qrkr2bb/pppppppp/8/1n2n3/1N5P/1P6/P1PPPPP1/QRKR1NBB w DBdb -
 perft 1 28
 perft 2 719
 perft 3 21048
@@ -7913,7 +7913,7 @@ perft 5 17351761
 perft 6 479400272
 
 id 879
-epd bbrqkrnn/3ppppp/8/ppp5/6P1/4P2N/PPPPKP1P/BBRQ1R1N w fc - 0 9
+epd bbrqkrnn/3ppppp/8/ppp5/6P1/4P2N/PPPPKP1P/BBRQ1R1N w fc -
 perft 1 21
 perft 2 704
 perft 3 16119
@@ -7922,7 +7922,7 @@ perft 5 13676371
 perft 6 470796854
 
 id 880
-epd brqbkrnn/1pp2p1p/3pp1p1/p5N1/8/1P6/P1PPPPPP/BRQBK1RN w Bfb - 0 9
+epd brqbkrnn/1pp2p1p/3pp1p1/p5N1/8/1P6/P1PPPPPP/BRQBK1RN w Bfb -
 perft 1 34
 perft 2 688
 perft 3 22827
@@ -7931,7 +7931,7 @@ perft 5 16639723
 perft 6 402140795
 
 id 881
-epd br1krb1n/2qppppp/pp3n2/8/1P4P1/8/P1PPPP1P/1RQKRBNN w EBeb - 0 9
+epd br1krb1n/2qppppp/pp3n2/8/1P4P1/8/P1PPPP1P/1RQKRBNN w EBeb -
 perft 1 24
 perft 2 945
 perft 3 23943
@@ -7940,7 +7940,7 @@ perft 5 25019636
 perft 6 959651619
 
 id 882
-epd brqkr1nb/2ppp1pp/1p2np2/p7/2P1PN2/8/PP1P1PPP/BRQKRN1B w EBeb - 0 9
+epd brqkr1nb/2ppp1pp/1p2np2/p7/2P1PN2/8/PP1P1PPP/BRQKRN1B w EBeb -
 perft 1 28
 perft 2 675
 perft 3 19728
@@ -7949,7 +7949,7 @@ perft 5 15516491
 perft 6 417396563
 
 id 883
-epd rbbqkrnn/3pppp1/p7/1pp4p/2P1P2P/8/PP1P1PP1/RBBQKRNN w FAfa - 0 9
+epd rbbqkrnn/3pppp1/p7/1pp4p/2P1P2P/8/PP1P1PP1/RBBQKRNN w FAfa -
 perft 1 26
 perft 2 671
 perft 3 18164
@@ -7958,7 +7958,7 @@ perft 5 14072641
 perft 6 404960259
 
 id 884
-epd rqbbkr1n/pp1p1p1p/4pn2/2p3p1/4P1P1/3P3P/PPP2P2/RQBBKRNN w FAfa - 0 9
+epd rqbbkr1n/pp1p1p1p/4pn2/2p3p1/4P1P1/3P3P/PPP2P2/RQBBKRNN w FAfa -
 perft 1 22
 perft 2 633
 perft 3 14629
@@ -7967,7 +7967,7 @@ perft 5 10776416
 perft 6 335689685
 
 id 885
-epd rqbkrbnn/p1ppp3/1p3pp1/7p/3P4/P1P5/1PQ1PPPP/R1BKRBNN w EAea - 0 9
+epd rqbkrbnn/p1ppp3/1p3pp1/7p/3P4/P1P5/1PQ1PPPP/R1BKRBNN w EAea -
 perft 1 32
 perft 2 607
 perft 3 20339
@@ -7976,7 +7976,7 @@ perft 5 15586203
 perft 6 383515709
 
 id 886
-epd rqbkrnn1/pp2ppbp/3p4/2p3p1/2P5/1P3N1P/P2PPPP1/RQBKRN1B w EAea - 1 9
+epd rqbkrnn1/pp2ppbp/3p4/2p3p1/2P5/1P3N1P/P2PPPP1/RQBKRN1B w EAea -
 perft 1 29
 perft 2 943
 perft 3 28732
@@ -7985,7 +7985,7 @@ perft 5 28761841
 perft 6 907579129
 
 id 887
-epd rbqkb1nn/1ppppr1p/p5p1/5p2/1P6/2P4P/P1KPPPP1/RBQ1BRNN w a - 1 9
+epd rbqkb1nn/1ppppr1p/p5p1/5p2/1P6/2P4P/P1KPPPP1/RBQ1BRNN w a -
 perft 1 22
 perft 2 441
 perft 3 10403
@@ -7994,7 +7994,7 @@ perft 5 5784206
 perft 6 140934555
 
 id 888
-epd rqkb1rnn/1pp1pp1p/p5p1/1b1p4/3P4/P5P1/RPP1PP1P/1QKBBRNN w Ffa - 1 9
+epd rqkb1rnn/1pp1pp1p/p5p1/1b1p4/3P4/P5P1/RPP1PP1P/1QKBBRNN w Ffa -
 perft 1 21
 perft 2 505
 perft 3 11592
@@ -8003,7 +8003,7 @@ perft 5 7147063
 perft 6 188559137
 
 id 889
-epd rq1rbbnn/pkp1ppp1/3p3p/1p2N1P1/8/8/PPPPPP1P/RQKRBB1N w DA - 0 9
+epd rq1rbbnn/pkp1ppp1/3p3p/1p2N1P1/8/8/PPPPPP1P/RQKRBB1N w DA -
 perft 1 27
 perft 2 608
 perft 3 16419
@@ -8012,7 +8012,7 @@ perft 5 10808908
 perft 6 268393274
 
 id 890
-epd rqkrb2b/p2ppppp/2p3nn/1p6/5P2/PP1P4/2P1P1PP/RQKRBNNB w DAda - 1 9
+epd rqkrb2b/p2ppppp/2p3nn/1p6/5P2/PP1P4/2P1P1PP/RQKRBNNB w DAda -
 perft 1 30
 perft 2 749
 perft 3 21563
@@ -8021,7 +8021,7 @@ perft 5 16916813
 perft 6 485406712
 
 id 891
-epd rbqkr1bn/pp1ppp2/2p1n2p/6p1/8/4BPNP/PPPPP1P1/RBQKRN2 w EAea - 0 9
+epd rbqkr1bn/pp1ppp2/2p1n2p/6p1/8/4BPNP/PPPPP1P1/RBQKRN2 w EAea -
 perft 1 23
 perft 2 600
 perft 3 15082
@@ -8030,7 +8030,7 @@ perft 5 11041820
 perft 6 314327867
 
 id 892
-epd rqkbrnb1/2ppp1pp/pp3pn1/8/5P2/B2P4/PPP1P1PP/RQKBRN1N w EAea - 2 9
+epd rqkbrnb1/2ppp1pp/pp3pn1/8/5P2/B2P4/PPP1P1PP/RQKBRN1N w EAea -
 perft 1 22
 perft 2 569
 perft 3 13541
@@ -8039,7 +8039,7 @@ perft 5 9395816
 perft 6 269460607
 
 id 893
-epd rqkrnbb1/p1p1pppp/1p4n1/3p4/7P/P3P3/1PPPBPP1/RQKRN1BN w DAda - 0 9
+epd rqkrnbb1/p1p1pppp/1p4n1/3p4/7P/P3P3/1PPPBPP1/RQKRN1BN w DAda -
 perft 1 27
 perft 2 579
 perft 3 15565
@@ -8048,7 +8048,7 @@ perft 5 10238486
 perft 6 266047417
 
 id 894
-epd rqkrn1bb/p1ppp1pp/4n3/1p6/6p1/4N3/PPPPPPPP/RQKR2BB w DAda - 0 9
+epd rqkrn1bb/p1ppp1pp/4n3/1p6/6p1/4N3/PPPPPPPP/RQKR2BB w DAda -
 perft 1 20
 perft 2 462
 perft 3 10234
@@ -8057,7 +8057,7 @@ perft 5 6563859
 perft 6 193376359
 
 id 895
-epd bbrkqr2/pppp1ppp/6nn/8/2P1p3/3PP2N/PP3PPP/BBRKQR1N w FCfc - 0 9
+epd bbrkqr2/pppp1ppp/6nn/8/2P1p3/3PP2N/PP3PPP/BBRKQR1N w FCfc -
 perft 1 28
 perft 2 724
 perft 3 21688
@@ -8066,7 +8066,7 @@ perft 5 19318355
 perft 6 593204629
 
 id 896
-epd brk1qrnn/1pppbppp/4p3/8/1p6/P1P4P/3PPPP1/BRKBQRNN w FBfb - 1 9
+epd brk1qrnn/1pppbppp/4p3/8/1p6/P1P4P/3PPPP1/BRKBQRNN w FBfb -
 perft 1 24
 perft 2 662
 perft 3 16920
@@ -8075,7 +8075,7 @@ perft 5 12610387
 perft 6 355969349
 
 id 897
-epd 1r1qrbnn/p1pkpppp/1p1p4/8/3P1PP1/P4b2/1PP1P2P/BRKQRBNN w EB - 1 9
+epd 1r1qrbnn/p1pkpppp/1p1p4/8/3P1PP1/P4b2/1PP1P2P/BRKQRBNN w EB -
 perft 1 22
 perft 2 696
 perft 3 17021
@@ -8084,7 +8084,7 @@ perft 5 13697382
 perft 6 401903030
 
 id 898
-epd 1rkqrnnb/p1p1p1pp/1p1p4/3b1p1N/4P3/5N2/PPPP1PPP/BRKQR2B w EBeb - 1 9
+epd 1rkqrnnb/p1p1p1pp/1p1p4/3b1p1N/4P3/5N2/PPPP1PPP/BRKQR2B w EBeb -
 perft 1 29
 perft 2 887
 perft 3 27035
@@ -8093,7 +8093,7 @@ perft 5 26051242
 perft 6 791718847
 
 id 899
-epd rbbkq1rn/pppppppp/7n/8/P7/3P3P/1PPKPPP1/RBB1QRNN w a - 3 9
+epd rbbkq1rn/pppppppp/7n/8/P7/3P3P/1PPKPPP1/RBB1QRNN w a -
 perft 1 22
 perft 2 417
 perft 3 9900
@@ -8102,7 +8102,7 @@ perft 5 5505063
 perft 6 134818483
 
 id 900
-epd rkbbqr1n/1p1pppp1/2p2n2/p4NBp/8/3P4/PPP1PPPP/RK1BQRN1 w FAfa - 0 9
+epd rkbbqr1n/1p1pppp1/2p2n2/p4NBp/8/3P4/PPP1PPPP/RK1BQRN1 w FAfa -
 perft 1 37
 perft 2 832
 perft 3 30533
@@ -8111,7 +8111,7 @@ perft 5 26676373
 perft 6 673756141
 
 id 901
-epd rkbqrb1n/3pBppp/ppp2n2/8/8/P2P4/1PP1PPPP/RK1QRBNN w EAea - 0 9
+epd rkbqrb1n/3pBppp/ppp2n2/8/8/P2P4/1PP1PPPP/RK1QRBNN w EAea -
 perft 1 28
 perft 2 685
 perft 3 19718
@@ -8120,7 +8120,7 @@ perft 5 16033316
 perft 6 482288814
 
 id 902
-epd rkb1rn1b/ppppqppp/4p3/8/1P2n1P1/5Q2/P1PP1P1P/RKB1RNNB w EAea - 2 9
+epd rkb1rn1b/ppppqppp/4p3/8/1P2n1P1/5Q2/P1PP1P1P/RKB1RNNB w EAea -
 perft 1 37
 perft 2 1158
 perft 3 40114
@@ -8129,7 +8129,7 @@ perft 5 44672979
 perft 6 1389312729
 
 id 903
-epd r1kqbrnn/pp1pp1p1/7p/2P2p2/5b2/3P4/P1P1P1PP/RBKQBRNN w FAfa - 0 9
+epd r1kqbrnn/pp1pp1p1/7p/2P2p2/5b2/3P4/P1P1P1PP/RBKQBRNN w FAfa -
 perft 1 5
 perft 2 161
 perft 3 4745
@@ -8138,7 +8138,7 @@ perft 5 4734999
 perft 6 157499039
 
 id 904
-epd rkqbbr1n/ppp1ppp1/8/Q2p3p/4n3/3P1P2/PPP1P1PP/RK1BBRNN w FAfa - 2 9
+epd rkqbbr1n/ppp1ppp1/8/Q2p3p/4n3/3P1P2/PPP1P1PP/RK1BBRNN w FAfa -
 perft 1 38
 perft 2 1144
 perft 3 40433
@@ -8147,7 +8147,7 @@ perft 5 43832975
 perft 6 1366087771
 
 id 905
-epd rkqrbbn1/p1ppppp1/Bp5p/8/P6n/2P1P3/1P1P1PPP/RKQRB1NN w DAda - 0 9
+epd rkqrbbn1/p1ppppp1/Bp5p/8/P6n/2P1P3/1P1P1PPP/RKQRB1NN w DAda -
 perft 1 28
 perft 2 551
 perft 3 15488
@@ -8156,7 +8156,7 @@ perft 5 9944107
 perft 6 251179183
 
 id 906
-epd rkqrb1nb/1ppp1ppp/p7/4p3/5n2/3P2N1/PPPQPPPP/RK1RB1NB w DAda - 0 9
+epd rkqrb1nb/1ppp1ppp/p7/4p3/5n2/3P2N1/PPPQPPPP/RK1RB1NB w DAda -
 perft 1 26
 perft 2 690
 perft 3 19877
@@ -8165,7 +8165,7 @@ perft 5 15965907
 perft 6 418191735
 
 id 907
-epd rbkqrnbn/pppp1p2/4p1p1/7p/7P/P2P4/BPP1PPP1/R1KQRNBN w EAea - 0 9
+epd rbkqrnbn/pppp1p2/4p1p1/7p/7P/P2P4/BPP1PPP1/R1KQRNBN w EAea -
 perft 1 27
 perft 2 515
 perft 3 13992
@@ -8174,7 +8174,7 @@ perft 5 8792550
 perft 6 218658292
 
 id 908
-epd rkqbrnbn/pp1ppp2/8/2p3p1/P1P4p/5P2/1PKPP1PP/R1QBRNBN w ea - 0 9
+epd rkqbrnbn/pp1ppp2/8/2p3p1/P1P4p/5P2/1PKPP1PP/R1QBRNBN w ea -
 perft 1 27
 perft 2 627
 perft 3 16843
@@ -8183,7 +8183,7 @@ perft 5 11978698
 perft 6 328434174
 
 id 909
-epd rkqrnbbn/1p2pp1p/3p2p1/p1p5/P5PP/3N4/1PPPPP2/RKQR1BBN w DAda - 0 9
+epd rkqrnbbn/1p2pp1p/3p2p1/p1p5/P5PP/3N4/1PPPPP2/RKQR1BBN w DAda -
 perft 1 23
 perft 2 624
 perft 3 15512
@@ -8192,7 +8192,7 @@ perft 5 11960861
 perft 6 367311176
 
 id 910
-epd rk2rnbb/ppqppppp/2pn4/8/1P3P2/6P1/P1PPP1NP/RKQR1NBB w DAa - 1 9
+epd rk2rnbb/ppqppppp/2pn4/8/1P3P2/6P1/P1PPP1NP/RKQR1NBB w DAa -
 perft 1 27
 perft 2 727
 perft 3 20206
@@ -8201,7 +8201,7 @@ perft 5 16633696
 perft 6 505212747
 
 id 911
-epd b1krrqnn/pp1ppp1p/2p3p1/8/P3Pb1P/1P6/2PP1PP1/BBRKRQNN w EC - 0 9
+epd b1krrqnn/pp1ppp1p/2p3p1/8/P3Pb1P/1P6/2PP1PP1/BBRKRQNN w EC -
 perft 1 32
 perft 2 943
 perft 3 30759
@@ -8210,7 +8210,7 @@ perft 5 28672582
 perft 6 800922511
 
 id 912
-epd 1rkbrqnn/p1pp1ppp/1p6/8/P2Pp3/8/1PPKPPQP/BR1BR1NN w eb - 0 9
+epd 1rkbrqnn/p1pp1ppp/1p6/8/P2Pp3/8/1PPKPPQP/BR1BR1NN w eb -
 perft 1 28
 perft 2 916
 perft 3 24892
@@ -8219,7 +8219,7 @@ perft 5 22840279
 perft 6 759318058
 
 id 913
-epd brkrqb1n/1pppp1pp/p7/3n1p2/P5P1/3PP3/1PP2P1P/BRKRQBNN w DBdb - 0 9
+epd brkrqb1n/1pppp1pp/p7/3n1p2/P5P1/3PP3/1PP2P1P/BRKRQBNN w DBdb -
 perft 1 27
 perft 2 669
 perft 3 18682
@@ -8228,7 +8228,7 @@ perft 5 13956472
 perft 6 380267099
 
 id 914
-epd brkrqnnb/3pppp1/1p6/p1p4p/2P3P1/6N1/PP1PPP1P/BRKRQ1NB w DBdb - 0 9
+epd brkrqnnb/3pppp1/1p6/p1p4p/2P3P1/6N1/PP1PPP1P/BRKRQ1NB w DBdb -
 perft 1 29
 perft 2 699
 perft 3 20042
@@ -8237,7 +8237,7 @@ perft 5 15093909
 perft 6 406594531
 
 id 915
-epd r1bkrq1n/pp2pppp/3b1n2/2pp2B1/6P1/3P1P2/PPP1P2P/RB1KRQNN w EAea - 2 9
+epd r1bkrq1n/pp2pppp/3b1n2/2pp2B1/6P1/3P1P2/PPP1P2P/RB1KRQNN w EAea -
 perft 1 27
 perft 2 835
 perft 3 22848
@@ -8246,7 +8246,7 @@ perft 5 19867800
 perft 6 631209313
 
 id 916
-epd rk1brq1n/p1p1pppp/3p1n2/1p3b2/4P3/2NQ4/PPPP1PPP/RKBBR2N w EAea - 4 9
+epd rk1brq1n/p1p1pppp/3p1n2/1p3b2/4P3/2NQ4/PPPP1PPP/RKBBR2N w EAea -
 perft 1 36
 perft 2 1004
 perft 3 35774
@@ -8255,7 +8255,7 @@ perft 5 35143142
 perft 6 966310885
 
 id 917
-epd rkbrqbnn/1p2ppp1/B1p5/p2p3p/4P2P/8/PPPP1PP1/RKBRQ1NN w DAda - 0 9
+epd rkbrqbnn/1p2ppp1/B1p5/p2p3p/4P2P/8/PPPP1PP1/RKBRQ1NN w DAda -
 perft 1 27
 perft 2 748
 perft 3 21005
@@ -8264,7 +8264,7 @@ perft 5 17597073
 perft 6 515304215
 
 id 918
-epd rkbrqn1b/pp1pp1pp/2p2p2/5n2/8/2P2P2/PP1PP1PP/RKBRQ1NB w DAda - 0 9
+epd rkbrqn1b/pp1pp1pp/2p2p2/5n2/8/2P2P2/PP1PP1PP/RKBRQ1NB w DAda -
 perft 1 20
 perft 2 479
 perft 3 10485
@@ -8273,7 +8273,7 @@ perft 5 6253775
 perft 6 167767913
 
 id 919
-epd rbkrbnn1/ppppp1pp/5q2/5p2/5P2/P3P2N/1PPP2PP/RBKRBQ1N w DAda - 3 9
+epd rbkrbnn1/ppppp1pp/5q2/5p2/5P2/P3P2N/1PPP2PP/RBKRBQ1N w DAda -
 perft 1 28
 perft 2 947
 perft 3 26900
@@ -8282,7 +8282,7 @@ perft 5 26007841
 perft 6 838704143
 
 id 920
-epd rkr1bqnn/1ppp1p1p/p5p1/4p3/3PP2b/2P2P2/PP4PP/RKRBBQNN w CAca - 0 9
+epd rkr1bqnn/1ppp1p1p/p5p1/4p3/3PP2b/2P2P2/PP4PP/RKRBBQNN w CAca -
 perft 1 31
 perft 2 1004
 perft 3 32006
@@ -8291,7 +8291,7 @@ perft 5 32688124
 perft 6 1024529879
 
 id 921
-epd rkrqbbnn/pppp3p/8/4ppp1/1PP4P/8/P2PPPP1/RKRQBBNN w CAca - 0 9
+epd rkrqbbnn/pppp3p/8/4ppp1/1PP4P/8/P2PPPP1/RKRQBBNN w CAca -
 perft 1 24
 perft 2 717
 perft 3 18834
@@ -8300,7 +8300,7 @@ perft 5 15844525
 perft 6 484884485
 
 id 922
-epd rkrqbn1b/pppp2pp/8/4pp2/1P1P2n1/5N2/P1P1PP1P/RKRQBN1B w CAca - 0 9
+epd rkrqbn1b/pppp2pp/8/4pp2/1P1P2n1/5N2/P1P1PP1P/RKRQBN1B w CAca -
 perft 1 25
 perft 2 718
 perft 3 19654
@@ -8309,7 +8309,7 @@ perft 5 17257753
 perft 6 537354146
 
 id 923
-epd rbkrqnbn/p1p1ppp1/1p1p4/8/3PP2p/2PB4/PP3PPP/R1KRQNBN w DAda - 0 9
+epd rbkrqnbn/p1p1ppp1/1p1p4/8/3PP2p/2PB4/PP3PPP/R1KRQNBN w DAda -
 perft 1 30
 perft 2 754
 perft 3 23298
@@ -8318,7 +8318,7 @@ perft 5 19338246
 perft 6 532603566
 
 id 924
-epd 1krbqnbn/1p2pppp/r1pp4/p7/8/1P1P2PP/P1P1PP2/RKRBQNBN w CAc - 0 9
+epd 1krbqnbn/1p2pppp/r1pp4/p7/8/1P1P2PP/P1P1PP2/RKRBQNBN w CAc -
 perft 1 21
 perft 2 566
 perft 3 13519
@@ -8327,7 +8327,7 @@ perft 5 9700847
 perft 6 279864836
 
 id 925
-epd rkrq1b2/pppppppb/3n2np/2N5/4P3/7P/PPPP1PP1/RKRQ1BBN w CAca - 1 9
+epd rkrq1b2/pppppppb/3n2np/2N5/4P3/7P/PPPP1PP1/RKRQ1BBN w CAca -
 perft 1 33
 perft 2 654
 perft 3 21708
@@ -8336,7 +8336,7 @@ perft 5 15990307
 perft 6 382218272
 
 id 926
-epd rkr1nnbb/ppp2p1p/3p1qp1/4p3/P5P1/3PN3/1PP1PP1P/RKRQN1BB w CAca - 1 9
+epd rkr1nnbb/ppp2p1p/3p1qp1/4p3/P5P1/3PN3/1PP1PP1P/RKRQN1BB w CAca -
 perft 1 28
 perft 2 715
 perft 3 20361
@@ -8345,7 +8345,7 @@ perft 5 16303092
 perft 6 468666425
 
 id 927
-epd bbrkrnqn/1p1ppppp/8/8/p2pP3/PP6/2P2PPP/BBRKRNQN w ECec - 0 9
+epd bbrkrnqn/1p1ppppp/8/8/p2pP3/PP6/2P2PPP/BBRKRNQN w ECec -
 perft 1 24
 perft 2 757
 perft 3 19067
@@ -8354,7 +8354,7 @@ perft 5 15957628
 perft 6 509307623
 
 id 928
-epd brkbrnqn/ppp2p2/4p3/P2p2pp/6P1/5P2/1PPPP2P/BRKBRNQN w EBeb - 0 9
+epd brkbrnqn/ppp2p2/4p3/P2p2pp/6P1/5P2/1PPPP2P/BRKBRNQN w EBeb -
 perft 1 25
 perft 2 548
 perft 3 14563
@@ -8363,7 +8363,7 @@ perft 5 9688526
 perft 6 247750144
 
 id 929
-epd brkr1bqn/1pppppp1/3n3p/1p6/P7/4P1P1/1PPP1P1P/BRKRN1QN w DBdb - 0 9
+epd brkr1bqn/1pppppp1/3n3p/1p6/P7/4P1P1/1PPP1P1P/BRKRN1QN w DBdb -
 perft 1 19
 perft 2 359
 perft 3 7430
@@ -8372,7 +8372,7 @@ perft 5 3521652
 perft 6 81787718
 
 id 930
-epd brkr1qnb/pppp2pp/2B1p3/5p2/2n5/6PP/PPPPPPN1/BRKR1QN1 w DBdb - 1 9
+epd brkr1qnb/pppp2pp/2B1p3/5p2/2n5/6PP/PPPPPPN1/BRKR1QN1 w DBdb -
 perft 1 27
 perft 2 854
 perft 3 23303
@@ -8381,7 +8381,7 @@ perft 5 20558538
 perft 6 667089231
 
 id 931
-epd rbbkrnqn/p1p1p1pp/8/1p1p4/1P1Pp3/6N1/P1P2PPP/RBBKRNQ1 w EAea - 0 9
+epd rbbkrnqn/p1p1p1pp/8/1p1p4/1P1Pp3/6N1/P1P2PPP/RBBKRNQ1 w EAea -
 perft 1 28
 perft 2 723
 perft 3 19844
@@ -8390,7 +8390,7 @@ perft 5 14621108
 perft 6 397454100
 
 id 932
-epd rkbbrn1n/pppppp2/5q1p/6p1/3P3P/4P3/PPP2PP1/RKBBRNQN w EAea - 1 9
+epd rkbbrn1n/pppppp2/5q1p/6p1/3P3P/4P3/PPP2PP1/RKBBRNQN w EAea -
 perft 1 25
 perft 2 741
 perft 3 19224
@@ -8399,7 +8399,7 @@ perft 5 15605840
 perft 6 485037906
 
 id 933
-epd rkbr1bq1/ppnppppp/6n1/2p5/2P1N2P/8/PP1PPPP1/RKBRNBQ1 w DAda - 3 9
+epd rkbr1bq1/ppnppppp/6n1/2p5/2P1N2P/8/PP1PPPP1/RKBRNBQ1 w DAda -
 perft 1 24
 perft 2 547
 perft 3 14359
@@ -8408,7 +8408,7 @@ perft 5 9410221
 perft 6 234041078
 
 id 934
-epd 1kbrnqnb/r1ppppp1/8/pp5p/8/1P1NP3/P1PP1PPP/RKB1RQNB w Ad - 2 9
+epd 1kbrnqnb/r1ppppp1/8/pp5p/8/1P1NP3/P1PP1PPP/RKB1RQNB w Ad -
 perft 1 26
 perft 2 618
 perft 3 17305
@@ -8417,7 +8417,7 @@ perft 5 13112297
 perft 6 357030697
 
 id 935
-epd rbkrb1qn/1pp1ppp1/3pn2p/pP6/8/4N1P1/P1PPPP1P/RBKRB1QN w DAda - 0 9
+epd rbkrb1qn/1pp1ppp1/3pn2p/pP6/8/4N1P1/P1PPPP1P/RBKRB1QN w DAda -
 perft 1 21
 perft 2 544
 perft 3 12492
@@ -8426,7 +8426,7 @@ perft 5 8381483
 perft 6 236013157
 
 id 936
-epd rkrbbnqn/ppppp3/5p2/6pp/5PBP/4P3/PPPP2P1/RKR1BNQN w CAca - 0 9
+epd rkrbbnqn/ppppp3/5p2/6pp/5PBP/4P3/PPPP2P1/RKR1BNQN w CAca -
 perft 1 30
 perft 2 891
 perft 3 25435
@@ -8435,7 +8435,7 @@ perft 5 21894752
 perft 6 669256602
 
 id 937
-epd rkr1bb1n/ppppp1pp/5p2/4n3/3QP3/5P2/RPPP2PP/1KRNBB1N w Cca - 1 9
+epd rkr1bb1n/ppppp1pp/5p2/4n3/3QP3/5P2/RPPP2PP/1KRNBB1N w Cca -
 perft 1 45
 perft 2 1172
 perft 3 51766
@@ -8444,7 +8444,7 @@ perft 5 57856784
 perft 6 1501852662
 
 id 938
-epd rkr1bqnb/pp1ppppp/8/2pN4/1P6/5N2/P1PPnPPP/RKR1BQ1B w CAca - 0 9
+epd rkr1bqnb/pp1ppppp/8/2pN4/1P6/5N2/P1PPnPPP/RKR1BQ1B w CAca -
 perft 1 28
 perft 2 730
 perft 3 20511
@@ -8453,7 +8453,7 @@ perft 5 16323242
 perft 6 463032124
 
 id 939
-epd rbkrnqb1/2ppppp1/p5np/1p6/8/3N4/PPPPPPPP/RBKRQNB1 w DAda - 2 9
+epd rbkrnqb1/2ppppp1/p5np/1p6/8/3N4/PPPPPPPP/RBKRQNB1 w DAda -
 perft 1 20
 perft 2 417
 perft 3 9159
@@ -8462,7 +8462,7 @@ perft 5 5180716
 perft 6 133936564
 
 id 940
-epd rkrbnqb1/p1pppnpp/5p2/1p6/2P5/1P1P1N2/P3PPPP/RKRB1QBN w CAca - 0 9
+epd rkrbnqb1/p1pppnpp/5p2/1p6/2P5/1P1P1N2/P3PPPP/RKRB1QBN w CAca -
 perft 1 25
 perft 2 546
 perft 3 14039
@@ -8471,7 +8471,7 @@ perft 5 8813781
 perft 6 222026485
 
 id 941
-epd rkr1qbbn/ppppppp1/4n3/7p/8/P7/KPPPPPPP/R1RNQBBN w ca - 0 9
+epd rkr1qbbn/ppppppp1/4n3/7p/8/P7/KPPPPPPP/R1RNQBBN w ca -
 perft 1 22
 perft 2 484
 perft 3 11458
@@ -8480,7 +8480,7 @@ perft 5 6633319
 perft 6 163291279
 
 id 942
-epd rkrnqnb1/1ppppp2/p5p1/7p/8/P1bPP3/1PP1QPPP/RKRN1NBB w CAca - 0 9
+epd rkrnqnb1/1ppppp2/p5p1/7p/8/P1bPP3/1PP1QPPP/RKRN1NBB w CAca -
 perft 1 22
 perft 2 636
 perft 3 15526
@@ -8489,7 +8489,7 @@ perft 5 11614241
 perft 6 331083405
 
 id 943
-epd b2krn1q/p1rppppp/1Q3n2/2p1b3/1P4P1/8/P1PPPP1P/BBRKRNN1 w ECe - 3 9
+epd b2krn1q/p1rppppp/1Q3n2/2p1b3/1P4P1/8/P1PPPP1P/BBRKRNN1 w ECe -
 perft 1 36
 perft 2 1192
 perft 3 42945
@@ -8498,7 +8498,7 @@ perft 5 50382104
 perft 6 1650202838
 
 id 944
-epd brkbrnn1/pp1pppp1/7q/2p5/6Pp/4P1NP/PPPP1P2/BRKBR1NQ w EBeb - 2 9
+epd brkbrnn1/pp1pppp1/7q/2p5/6Pp/4P1NP/PPPP1P2/BRKBR1NQ w EBeb -
 perft 1 30
 perft 2 978
 perft 3 29593
@@ -8507,7 +8507,7 @@ perft 5 29205057
 perft 6 936568065
 
 id 945
-epd brkrnb1q/pp1p1ppp/2p1p3/5n2/1P6/5N1N/P1PPPPPP/BRKR1B1Q w DBdb - 1 9
+epd brkrnb1q/pp1p1ppp/2p1p3/5n2/1P6/5N1N/P1PPPPPP/BRKR1B1Q w DBdb -
 perft 1 31
 perft 2 897
 perft 3 27830
@@ -8516,7 +8516,7 @@ perft 5 25423729
 perft 6 755334868
 
 id 946
-epd brkr1nqb/pp1p1pp1/2pn3p/P3p3/4P3/6P1/1PPP1P1P/BRKRNNQB w DBdb - 0 9
+epd brkr1nqb/pp1p1pp1/2pn3p/P3p3/4P3/6P1/1PPP1P1P/BRKRNNQB w DBdb -
 perft 1 19
 perft 2 382
 perft 3 8052
@@ -8525,7 +8525,7 @@ perft 5 4232274
 perft 6 103537333
 
 id 947
-epd r1bkrn1q/ppbppppp/5n2/2p5/3P4/P6N/1PP1PPPP/RBBKRNQ1 w EAea - 3 9
+epd r1bkrn1q/ppbppppp/5n2/2p5/3P4/P6N/1PP1PPPP/RBBKRNQ1 w EAea -
 perft 1 27
 perft 2 822
 perft 3 22551
@@ -8534,7 +8534,7 @@ perft 5 19115128
 perft 6 578210135
 
 id 948
-epd rkbbrnnq/pp2pppp/8/2pp4/P1P5/1P3P2/3PP1PP/RKBBRNNQ w EAea - 1 9
+epd rkbbrnnq/pp2pppp/8/2pp4/P1P5/1P3P2/3PP1PP/RKBBRNNQ w EAea -
 perft 1 23
 perft 2 643
 perft 3 15410
@@ -8543,7 +8543,7 @@ perft 5 11170489
 perft 6 329615708
 
 id 949
-epd rkbr1b1q/p1pppppp/1p1n4/7n/5QP1/3N4/PPPPPP1P/RKBR1BN1 w DAda - 4 9
+epd rkbr1b1q/p1pppppp/1p1n4/7n/5QP1/3N4/PPPPPP1P/RKBR1BN1 w DAda -
 perft 1 37
 perft 2 943
 perft 3 34382
@@ -8552,7 +8552,7 @@ perft 5 31568111
 perft 6 842265141
 
 id 950
-epd rkbr1nqb/pppp2np/8/4ppp1/1P6/6N1/P1PPPPPP/RKBRN1QB w DAda - 1 9
+epd rkbr1nqb/pppp2np/8/4ppp1/1P6/6N1/P1PPPPPP/RKBRN1QB w DAda -
 perft 1 23
 perft 2 574
 perft 3 13260
@@ -8561,7 +8561,7 @@ perft 5 9020291
 perft 6 261247606
 
 id 951
-epd rbkr1nnq/p1p1pp1p/1p4p1/3p4/b3P3/4N3/PPPPNPPP/RBKRB1Q1 w DAda - 0 9
+epd rbkr1nnq/p1p1pp1p/1p4p1/3p4/b3P3/4N3/PPPPNPPP/RBKRB1Q1 w DAda -
 perft 1 26
 perft 2 900
 perft 3 23414
@@ -8570,7 +8570,7 @@ perft 5 21653203
 perft 6 745802405
 
 id 952
-epd rkrbb1nq/p2pppp1/1p4n1/2p4p/3N4/4P1P1/PPPP1P1P/RKRBBN1Q w CAca - 0 9
+epd rkrbb1nq/p2pppp1/1p4n1/2p4p/3N4/4P1P1/PPPP1P1P/RKRBBN1Q w CAca -
 perft 1 32
 perft 2 697
 perft 3 22231
@@ -8579,7 +8579,7 @@ perft 5 17150175
 perft 6 441578567
 
 id 953
-epd rkrnbb1q/pp2pp1p/6pn/2pp4/2B1P2P/8/PPPP1PP1/RKRNB1NQ w CAca - 0 9
+epd rkrnbb1q/pp2pp1p/6pn/2pp4/2B1P2P/8/PPPP1PP1/RKRNB1NQ w CAca -
 perft 1 28
 perft 2 854
 perft 3 23853
@@ -8588,7 +8588,7 @@ perft 5 21823412
 perft 6 712787248
 
 id 954
-epd rk2bnqb/pprpppp1/4n2p/2p5/P7/3P2NP/1PP1PPP1/RKRNB1QB w CAa - 1 9
+epd rk2bnqb/pprpppp1/4n2p/2p5/P7/3P2NP/1PP1PPP1/RKRNB1QB w CAa -
 perft 1 26
 perft 2 596
 perft 3 16251
@@ -8597,7 +8597,7 @@ perft 5 11758184
 perft 6 323043654
 
 id 955
-epd r1krnnbq/pp1ppp1p/6p1/2p5/2P5/P3P3/Rb1P1PPP/1BKRNNBQ w Dda - 0 9
+epd r1krnnbq/pp1ppp1p/6p1/2p5/2P5/P3P3/Rb1P1PPP/1BKRNNBQ w Dda -
 perft 1 2
 perft 2 61
 perft 3 1312
@@ -8606,7 +8606,7 @@ perft 5 937188
 perft 6 28753562
 
 id 956
-epd 1krbnnbq/1pp1p1pp/r7/p2p1p2/3PP3/2P3P1/PP3P1P/RKRBNNBQ w CAc - 0 9
+epd 1krbnnbq/1pp1p1pp/r7/p2p1p2/3PP3/2P3P1/PP3P1P/RKRBNNBQ w CAc -
 perft 1 30
 perft 2 953
 perft 3 28033
@@ -8615,7 +8615,7 @@ perft 5 25531358
 perft 6 787205262
 
 id 957
-epd rkr1nbbq/2ppp1pp/1pn5/p4p2/P6P/3P4/1PP1PPPB/RKRNNB1Q w CAca - 1 9
+epd rkr1nbbq/2ppp1pp/1pn5/p4p2/P6P/3P4/1PP1PPPB/RKRNNB1Q w CAca -
 perft 1 24
 perft 2 645
 perft 3 15689
@@ -8624,7 +8624,7 @@ perft 5 11484012
 perft 6 341262639
 
 id 958
-epd rkrnnqbb/p1ppp2p/Qp6/4Pp2/5p2/8/PPPP2PP/RKRNN1BB w CAca - 0 9
+epd rkrnnqbb/p1ppp2p/Qp6/4Pp2/5p2/8/PPPP2PP/RKRNN1BB w CAca -
 perft 1 35
 perft 2 929
 perft 3 32020
@@ -8633,7 +8633,7 @@ perft 5 31272517
 perft 6 915268405
 
 id 959
-epd bbq1nr1r/pppppk1p/2n2p2/6p1/P4P2/4P1P1/1PPP3P/BBQNNRKR w HF - 1 9
+epd bbq1nr1r/pppppk1p/2n2p2/6p1/P4P2/4P1P1/1PPP3P/BBQNNRKR w HF -
 perft 1 23
 perft 2 589
 perft 3 14744

From eaa6eb3b023e92441f9de810785bb1716dd4d0b5 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 4 May 2024 18:03:34 +0200
Subject: [PATCH 526/613] Fixup invalid EPD in crazyhouse.perft file

---
 examples/perft/crazyhouse.perft | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/perft/crazyhouse.perft b/examples/perft/crazyhouse.perft
index 42ccd68a6..ef07eac04 100644
--- a/examples/perft/crazyhouse.perft
+++ b/examples/perft/crazyhouse.perft
@@ -18,7 +18,7 @@ perft 3 58057
 perft 4 2083382
 
 id zh-promoted
-epd 4k3/1Q~6/8/8/4b3/8/Kpp5/8/ b - - 0 1
+epd 4k3/1Q~6/8/8/4b3/8/Kpp5/8/ b - -
 perft 1 20
 perft 2 360
 perft 3 5445

From 122963b82e408417e2b4fd17643a61f42f4e9ae9 Mon Sep 17 00:00:00 2001
From: 3d12 <3d12@users.noreply.github.com>
Date: Thu, 16 May 2024 20:09:41 -0500
Subject: [PATCH 527/613] Add rookognition

---
 README.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.rst b/README.rst
index 7a677a451..c80957a37 100644
--- a/README.rst
+++ b/README.rst
@@ -351,6 +351,7 @@ If you like, share interesting things you are using python-chess for, for exampl
 * a `browser based PGN viewer `_ written in PyScript – https://github.com/nmstoker/ChessMatchViewer
 * an accessible chessboard that allows blind and visually impaired  players  to play chess against Stockfish – https://github.com/blindpandas/chessmart
 * analyse games to extract various statistics – https://github.com/mvrozanti/chess-playground
+* a web-based chess vision exercise – https://github.com/3d12/rookognition
 
 
 Prior art

From 102542a3c07c74557038ced2086c0d9bbb813cf4 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sun, 26 May 2024 03:46:30 -0700
Subject: [PATCH 528/613] Remove GameNodeComment class

Changes PR to a simpler change that is not backwards compatible.
---
 chess/pgn.py | 196 +++++++++++----------------------------------------
 test.py      |  66 +++++++----------
 2 files changed, 65 insertions(+), 197 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index e462a0750..b40ce257c 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -130,6 +130,10 @@ def repl(match: typing.Match[str]) -> str:
     return repl
 
 
+def _standardize_comments(comment: Union[str, list[str]]) -> list[str]:
+    return [] if not comment else [comment] if isinstance(comment, str) else comment
+
+
 TAG_ROSTER = ["Event", "Site", "Date", "Round", "White", "Black", "Result"]
 
 
@@ -184,92 +188,6 @@ def __init__(self, node: ChildNode, *, is_variation: bool = False, sidelines: bo
         self.in_variation = False
 
 
-class GameNodeComment:
-    """
-    PGN Comment Storage
-
-    A class that can hold one or more comments for a GameNode.
-    """
-
-    def __init__(self, comment: Union[str, list[str], GameNodeComment] = ""):
-        """Create a new comment."""
-        self.set(comment._comments if isinstance(comment,GameNodeComment) else comment)
-
-    def set(self, new_comment: Union[str, list[str]]) -> None:
-        """Replace the comment with a new comment or a list of comments."""
-        self._comments = new_comment if isinstance(new_comment, list) else [new_comment] if new_comment else []
-
-    def pgn_format(self) -> str:
-        """Create a string representation of the comments in PGN format."""
-        comments = map(lambda s: s.replace("{", ""), self._comments)
-        comments = map(lambda s: s.replace("}", "").strip(), comments)
-        return " ".join(f"{{ {comment} }}" for comment in comments if comment)
-
-    def remove_empty(self) -> None:
-        """Remove empty comments from the comment list."""
-        self._comments = list(filter(None, self._comments))
-
-    def append(self, new_comment: Union[str, list[str]]) -> None:
-        """Append one or more new comments to the end of the comment list."""
-        if new_comment:
-            if isinstance(new_comment, str):
-                self._comments.append(new_comment)
-            else:
-                self._comments.extend(new_comment)
-
-    def insert(self, index: int, new_comment: str) -> None:
-        """Insert a new comment before the specified index."""
-        self._comments.insert(index, new_comment)
-
-    def pop(self, index: int = -1) -> None:
-        """Delete comment at the given index (default is the last comment)."""
-        self._comments.pop(index)
-
-    def __len__(self) -> int:
-        """Get the number of comments in this node."""
-        return len(self._comments)
-
-    def __getitem__(self, index: int) -> str:
-        """Get the comment at the given index."""
-        return self._comments[index]
-
-    def __setitem__(self, index: int, new_comment: str) -> None:
-        """Change the comment at the given index."""
-        self._comments[index] = new_comment
-
-    def __iter__(self) -> Iterator[str]:
-        """Return an iterator over all comments."""
-        return iter(self._comments)
-
-    def __add__(self, other: Union[str, list[str], GameNodeComment]) -> GameNodeComment:
-        """Create a new comment set by adding two comment sets with +."""
-        if isinstance(other, GameNodeComment):
-            return GameNodeComment(self._comments + other._comments)
-        else:
-            new_node_comment = GameNodeComment(self._comments.copy())
-            new_node_comment.append(other)
-            return new_node_comment
-
-    def __eq__(self, other: object) -> bool:
-        """Check for equality between two comment sets."""
-        if isinstance(other, str):
-            return (len(self) == 1 and self[0] == other) or (not self and not other)
-        elif isinstance(other, list):
-            return self._comments == other
-        elif isinstance(other, GameNodeComment):
-            return self._comments == other._comments
-        else:
-            return False
-
-    def __repr__(self) -> str:
-        """Return a code-like representation of the class."""
-        return f"{self.__class__.__name__}({self._comments})"
-
-    def __str__(self) -> str:
-        """Return a string representation of the comments in PGN format."""
-        return self.pgn_format()
-
-
 class GameNode(abc.ABC):
     parent: Optional[GameNode]
     """The parent node or ``None`` if this is the root node of the game."""
@@ -283,45 +201,13 @@ class GameNode(abc.ABC):
     variations: List[ChildNode]
     """A list of child nodes."""
 
-    _comment: GameNodeComment
+    comments: list[str]
     """
     A comment that goes behind the move leading to this node. Comments
     that occur before any moves are assigned to the root node.
     """
 
-    @property
-    def comment(self) -> str:
-        return " ".join(self._comment)
-
-    @comment.setter
-    def comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
-        self._comment = GameNodeComment(new_comment)
-
-    @property
-    def comments(self) -> GameNodeComment:
-        return self._comment
-
-    @comments.setter
-    def comments(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
-        self._comment = GameNodeComment(new_comment)
-
-    _starting_comment: GameNodeComment
-
-    @property
-    def starting_comment(self) -> str:
-        return " ".join(self._starting_comment)
-
-    @starting_comment.setter
-    def starting_comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
-        self._starting_comment = GameNodeComment(new_comment)
-
-    @property
-    def starting_comments(self) -> GameNodeComment:
-        return self._starting_comment
-
-    @starting_comments.setter
-    def starting_comments(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
-        self._starting_comment = GameNodeComment(new_comment)
+    starting_comments: list[str]
 
     nags: Set[int]
 
@@ -329,11 +215,11 @@ def __init__(self, *, comment: Union[str, list[str]] = "") -> None:
         self.parent = None
         self.move = None
         self.variations = []
-        self.comments = GameNodeComment(comment)
+        self.comments = _standardize_comments(comment)
 
         # Deprecated: These should be properties of ChildNode, but need to
         # remain here for backwards compatibility.
-        self.starting_comments = GameNodeComment()
+        self.starting_comments = []
         self.nags = set()
 
     @abc.abstractmethod
@@ -549,7 +435,8 @@ def add_line(self, moves: Iterable[chess.Move], *, comment: Union[str, list[str]
             starting_comment = ""
 
         # Merge comment and NAGs.
-        node.comments.append(comment)
+        comments = _standardize_comments(comment)
+        node.comments.extend(comments)
         node.nags.update(nags)
 
         return node
@@ -561,7 +448,7 @@ def eval(self) -> Optional[chess.engine.PovScore]:
 
         Complexity is `O(n)`.
         """
-        match = EVAL_REGEX.search(self.comment)
+        match = EVAL_REGEX.search(" ".join(self.comments))
         if not match:
             return None
 
@@ -587,7 +474,7 @@ def eval_depth(self) -> Optional[int]:
 
         Complexity is `O(1)`.
         """
-        match = EVAL_REGEX.search(self.comment)
+        match = EVAL_REGEX.search(" ".join(self.comments))
         return int(match.group("depth")) if match and match.group("depth") else None
 
     def set_eval(self, score: Optional[chess.engine.PovScore], depth: Optional[int] = None) -> None:
@@ -610,7 +497,7 @@ def set_eval(self, score: Optional[chess.engine.PovScore], depth: Optional[int]
             if found:
                 break
 
-        self.comments.remove_empty()
+        self.comments = list(filter(None, self.comments))
 
         if not found and eval:
             self.comments.append(eval)
@@ -623,7 +510,7 @@ def arrows(self) -> List[chess.svg.Arrow]:
         Returns a list of :class:`arrows `.
         """
         arrows = []
-        for match in ARROWS_REGEX.finditer(self.comment):
+        for match in ARROWS_REGEX.finditer(" ".join(self.comments)):
             for group in match.group("arrows").split(","):
                 arrows.append(chess.svg.Arrow.from_pgn(group))
 
@@ -648,7 +535,7 @@ def set_arrows(self, arrows: Iterable[Union[chess.svg.Arrow, Tuple[Square, Squar
         for index in range(len(self.comments)):
             self.comments[index] = ARROWS_REGEX.sub(_condense_affix(""), self.comments[index])
 
-        self.comments.remove_empty()
+        self.comments = list(filter(None, self.comments))
 
         prefix = ""
         if csl:
@@ -667,7 +554,7 @@ def clock(self) -> Optional[float]:
         Returns the player's remaining time to the next time control after this
         move, in seconds.
         """
-        match = CLOCK_REGEX.search(self.comment)
+        match = CLOCK_REGEX.search(" ".join(self.comments))
         if match is None:
             return None
         return int(match.group("hours")) * 3600 + int(match.group("minutes")) * 60 + float(match.group("seconds"))
@@ -692,7 +579,7 @@ def set_clock(self, seconds: Optional[float]) -> None:
             if found:
                 break
 
-        self.comments.remove_empty()
+        self.comments = list(filter(None, self.comments))
 
         if not found and clk:
             self.comments.append(clk)
@@ -705,7 +592,7 @@ def emt(self) -> Optional[float]:
         Returns the player's elapsed move time use for the comment of this
         move, in seconds.
         """
-        match = EMT_REGEX.search(self.comment)
+        match = EMT_REGEX.search(" ".join(self.comments))
         if match is None:
             return None
         return int(match.group("hours")) * 3600 + int(match.group("minutes")) * 60 + float(match.group("seconds"))
@@ -730,7 +617,7 @@ def set_emt(self, seconds: Optional[float]) -> None:
             if found:
                 break
 
-        self.comments.remove_empty()
+        self.comments = list(filter(None, self.comments))
 
         if not found and emt:
             self.comments.append(emt)
@@ -789,7 +676,7 @@ class ChildNode(GameNode):
     move: chess.Move
     """The move leading to this node."""
 
-    _starting_comment: GameNodeComment
+    starting_comments: list[str]
     """
     A comment for the start of a variation. Only nodes that
     actually start a variation (:func:`~chess.pgn.GameNode.starts_variation()`
@@ -797,14 +684,6 @@ class ChildNode(GameNode):
     a starting comment.
     """
 
-    @property
-    def starting_comment(self) -> str:
-        return " ".join(self._starting_comment)
-
-    @starting_comment.setter
-    def starting_comment(self, new_comment: Union[str, list[str], GameNodeComment]) -> None:
-        self._starting_comment = GameNodeComment(new_comment)
-
     nags: Set[int]
     """
     A set of NAGs as integers. NAGs always go behind a move, so the root
@@ -818,7 +697,7 @@ def __init__(self, parent: GameNode, move: chess.Move, *, comment: Union[str, li
         self.parent.variations.append(self)
 
         self.nags.update(nags)
-        self.starting_comments = GameNodeComment(starting_comment)
+        self.starting_comments = _standardize_comments(starting_comment)
 
     def board(self) -> chess.Board:
         stack: List[chess.Move] = []
@@ -874,7 +753,7 @@ def end(self) -> ChildNode:
         return typing.cast(ChildNode, super().end())
 
     def _accept_node(self, parent_board: chess.Board, visitor: BaseVisitor[ResultT]) -> None:
-        if self.starting_comment:
+        if self.starting_comments:
             visitor.visit_comment(self.starting_comments)
 
         visitor.visit_move(parent_board, self.move)
@@ -1270,7 +1149,7 @@ def visit_board(self, board: chess.Board) -> None:
         """
         pass
 
-    def visit_comment(self, comment: GameNodeComment) -> None:
+    def visit_comment(self, comment: list[str]) -> None:
         """Called for each comment."""
         pass
 
@@ -1324,7 +1203,7 @@ def begin_game(self) -> None:
         self.game: GameT = self.Game()
 
         self.variation_stack: List[GameNode] = [self.game]
-        self.starting_comment = GameNodeComment()
+        self.starting_comments: list[str] = []
         self.in_variation = False
 
     def begin_headers(self) -> Headers:
@@ -1349,24 +1228,23 @@ def visit_result(self, result: str) -> None:
         if self.game.headers.get("Result", "*") == "*":
             self.game.headers["Result"] = result
 
-    def visit_comment(self, comment: GameNodeComment) -> None:
+    def visit_comment(self, comment: Union[str, list[str]]) -> None:
+        comments = _standardize_comments(comment)
         if self.in_variation or (self.variation_stack[-1].parent is None and self.variation_stack[-1].is_end()):
             # Add as a comment for the current node if in the middle of
             # a variation. Add as a comment for the game if the comment
             # starts before any move.
-            new_comments = self.variation_stack[-1].comments + comment
-            new_comments.remove_empty()
-            self.variation_stack[-1].comments = new_comments
+            self.variation_stack[-1].comments.extend(comments)
+            self.variation_stack[-1].comments = list(filter(None, self.variation_stack[-1].comments))
         else:
             # Otherwise, it is a starting comment.
-            new_comments = self.starting_comment + comment
-            new_comments.remove_empty()
-            self.starting_comment = new_comments
+            self.starting_comments.extend(comments)
+            self.starting_comments = list(filter(None, self.starting_comments))
 
     def visit_move(self, board: chess.Board, move: chess.Move) -> None:
         self.variation_stack[-1] = self.variation_stack[-1].add_variation(move)
-        self.variation_stack[-1].starting_comments = self.starting_comment
-        self.starting_comment = GameNodeComment()
+        self.variation_stack[-1].starting_comments = self.starting_comments
+        self.starting_comments = []
         self.in_variation = True
 
     def handle_error(self, error: Exception) -> None:
@@ -1534,9 +1412,15 @@ def end_variation(self) -> None:
             self.write_token(") ")
             self.force_movenumber = True
 
-    def visit_comment(self, comment: GameNodeComment) -> None:
+    def visit_comment(self, comment: Union[str, list[str]]) -> None:
         if self.comments and (self.variations or not self.variation_depth):
-            self.write_token(comment.pgn_format() + " ")
+            def pgn_format(comments: list[str]) -> str:
+                comments = map(lambda s: s.replace("{", ""), comments)
+                comments = map(lambda s: s.replace("}", ""), comments)
+                return " ".join(f"{{ {comment} }}" for comment in comments if comment)
+
+            comments = _standardize_comments(comment)
+            self.write_token(pgn_format(comments) + " ")
             self.force_movenumber = True
 
     def visit_nag(self, nag: int) -> None:
diff --git a/test.py b/test.py
index 4baf2dc58..92afd8de7 100755
--- a/test.py
+++ b/test.py
@@ -2083,29 +2083,29 @@ class PgnTestCase(unittest.TestCase):
 
     def test_exporter(self):
         game = chess.pgn.Game()
-        game.comment = "Test game:"
+        game.comments = ["Test game:"]
         game.headers["Result"] = "*"
         game.headers["VeryLongHeader"] = "This is a very long header, much wider than the 80 columns that PGNs are formatted with by default"
 
         e4 = game.add_variation(game.board().parse_san("e4"))
-        e4.comment = "Scandinavian Defense:"
+        e4.comments = ["Scandinavian Defense:"]
 
         e4_d5 = e4.add_variation(e4.board().parse_san("d5"))
 
         e4_h5 = e4.add_variation(e4.board().parse_san("h5"))
         e4_h5.nags.add(chess.pgn.NAG_MISTAKE)
-        e4_h5.starting_comment = "This"
-        e4_h5.comment = "is nonsense"
+        e4_h5.starting_comments = ["This"]
+        e4_h5.comments = ["is nonsense"]
 
         e4_e5 = e4.add_variation(e4.board().parse_san("e5"))
         e4_e5_Qf3 = e4_e5.add_variation(e4_e5.board().parse_san("Qf3"))
         e4_e5_Qf3.nags.add(chess.pgn.NAG_MISTAKE)
 
         e4_c5 = e4.add_variation(e4.board().parse_san("c5"))
-        e4_c5.comment = "Sicilian"
+        e4_c5.comments = ["Sicilian"]
 
         e4_d5_exd5 = e4_d5.add_main_variation(e4_d5.board().parse_san("exd5"))
-        e4_d5_exd5.comment = ["Best", "and the end of this example"]
+        e4_d5_exd5.comments = ["Best", "and the end of this example"]
 
         # Test string exporter with various options.
         exporter = chess.pgn.StringExporter(headers=False, comments=False, variations=False)
@@ -2224,26 +2224,16 @@ def test_read_game_with_multicomment_move(self):
         pgn = io.StringIO("1. e4 {A common opening} 1... e5 {A common response} {An uncommon comment}")
         game = chess.pgn.read_game(pgn)
         first_move = game.variation(0)
-        self.assertEqual(first_move.comment, "A common opening")
-        self.assertEqual(first_move.comments, "A common opening")
         self.assertEqual(first_move.comments, ["A common opening"])
         second_move = first_move.variation(0)
         self.assertEqual(second_move.comments, ["A common response", "An uncommon comment"])
         second_move.comments.pop()
         self.assertEqual(second_move.comments, ["A common response"])
-        self.assertEqual(second_move.comments, "A common response")
-        self.assertEqual(second_move.comment, "A common response")
         second_move.comments.append("A replaced comment")
         multiple_comments = ["A common response", "A replaced comment"]
         self.assertEqual(second_move.comments, multiple_comments)
-        for move_comment, test_comment in zip(second_move.comments, multiple_comments):
-            self.assertEqual(move_comment, test_comment)
-        self.assertEqual(list(second_move.comments), multiple_comments)
-        self.assertEqual(second_move.comment, " ".join(multiple_comments))
         second_move.comments.pop(0)
         self.assertEqual(second_move.comments, ["A replaced comment"])
-        self.assertEqual(second_move.comments, "A replaced comment")
-        self.assertEqual(second_move.comment, "A replaced comment")
 
     def test_comment_at_eol(self):
         pgn = io.StringIO(textwrap.dedent("""\
@@ -2259,7 +2249,7 @@ def test_comment_at_eol(self):
 
         # Make sure the comment for the second variation is there.
         self.assertIn(5, node[1].nags)
-        self.assertEqual(node[1].comment, "\n/\\ Ne7, c6")
+        self.assertEqual(node[1].comments, ["\n/\\ Ne7, c6"])
 
     def test_promotion_without_equals(self):
         # Example game from https://github.com/rozim/ChessData as originally
@@ -2347,12 +2337,12 @@ def test_variation_stack(self):
     def test_game_starting_comment(self):
         pgn = io.StringIO("{ Game starting comment } 1. d3")
         game = chess.pgn.read_game(pgn)
-        self.assertEqual(game.comment, "Game starting comment")
+        self.assertEqual(game.comments, ["Game starting comment"])
         self.assertEqual(game[0].san(), "d3")
 
         pgn = io.StringIO("{ Empty game, but has a comment }")
         game = chess.pgn.read_game(pgn)
-        self.assertEqual(game.comment, "Empty game, but has a comment")
+        self.assertEqual(game.comments, ["Empty game, but has a comment"])
 
     def test_game_starting_variation(self):
         pgn = io.StringIO(textwrap.dedent("""\
@@ -2360,17 +2350,17 @@ def test_game_starting_variation(self):
             """))
 
         game = chess.pgn.read_game(pgn)
-        self.assertEqual(game.comment, "Start of game")
+        self.assertEqual(game.comments, ["Start of game"])
 
         node = game[0]
         self.assertEqual(node.move, chess.Move.from_uci("e2e4"))
-        self.assertFalse(node.comment)
-        self.assertFalse(node.starting_comment)
+        self.assertFalse(node.comments)
+        self.assertFalse(node.starting_comments)
 
         node = game[1]
         self.assertEqual(node.move, chess.Move.from_uci("d2d4"))
-        self.assertFalse(node.comment)
-        self.assertEqual(node.starting_comment, "Start of variation")
+        self.assertFalse(node.comments)
+        self.assertEqual(node.starting_comments, ["Start of variation"])
 
     def test_annotation_symbols(self):
         pgn = io.StringIO("1. b4?! g6 2. Bb2 Nc6? 3. Bxh8!!")
@@ -2715,12 +2705,12 @@ def test_add_line(self):
         tail = game.add_line(moves, starting_comment="start", comment="end", nags=(17, 42))
 
         self.assertEqual(tail.parent.move, chess.Move.from_uci("g1f3"))
-        self.assertEqual(tail.parent.starting_comment, "start")
-        self.assertEqual(tail.parent.comment, "")
+        self.assertEqual(tail.parent.starting_comments, ["start"])
+        self.assertEqual(tail.parent.comments, [])
         self.assertEqual(len(tail.parent.nags), 0)
 
         self.assertEqual(tail.move, chess.Move.from_uci("d7d5"))
-        self.assertEqual(tail.comment, "end")
+        self.assertEqual(tail.comments, ["end"])
         self.assertIn(42, tail.nags)
 
     def test_mainline(self):
@@ -2850,12 +2840,11 @@ def test_recursion(self):
 
     def test_annotations(self):
         game = chess.pgn.Game()
-        game.comment = "foo [%bar] baz"
+        game.comments = ["foo [%bar] baz"]
 
         self.assertTrue(game.clock() is None)
         clock = 12345
         game.set_clock(clock)
-        self.assertEqual(game.comment, "foo [%bar] baz [%clk 3:25:45]")
         self.assertEqual(game.comments, ["foo [%bar] baz", "[%clk 3:25:45]"])
         self.assertEqual(game.clock(), clock)
 
@@ -2872,7 +2861,6 @@ def test_annotations(self):
         self.assertEqual(game.arrows(), [])
         game.set_arrows([(chess.A1, chess.A1), chess.svg.Arrow(chess.A1, chess.H1, color="red"), chess.svg.Arrow(chess.B1, chess.B8)])
         self.assertEqual(game.comments, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]", "[%eval #1,5]"])
-        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%eval #1,5]")
         arrows = game.arrows()
         self.assertEqual(len(arrows), 3)
         self.assertEqual(arrows[0].color, "green")
@@ -2883,21 +2871,17 @@ def test_annotations(self):
         emt = 321
         game.set_emt(emt)
         self.assertEqual(game.comments, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]", "[%eval #1,5]", "[%emt 0:05:21]"])
-        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%eval #1,5] [%emt 0:05:21]")
         self.assertEqual(game.emt(), emt)
 
         game.set_eval(None)
         self.assertEqual(game.comments, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]", "[%emt 0:05:21]"])
-        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45] [%emt 0:05:21]")
 
         game.set_emt(None)
         self.assertEqual(game.comments, ["[%csl Ga1][%cal Ra1h1,Gb1b8]", "foo [%bar] baz", "[%clk 3:25:45]"])
-        self.assertEqual(game.comment, "[%csl Ga1][%cal Ra1h1,Gb1b8] foo [%bar] baz [%clk 3:25:45]")
 
         game.set_clock(None)
         game.set_arrows([])
-        self.assertEqual(game.comments, "foo [%bar] baz")
-        self.assertEqual(game.comment, "foo [%bar] baz")
+        self.assertEqual(game.comments, ["foo [%bar] baz"])
 
     def test_eval(self):
         game = chess.pgn.Game()
@@ -2907,28 +2891,28 @@ def test_eval(self):
 
     def test_float_emt(self):
         game = chess.pgn.Game()
-        game.comment = "[%emt 0:00:01.234]"
+        game.comments = ["[%emt 0:00:01.234]"]
         self.assertEqual(game.emt(), 1.234)
 
         game.set_emt(6.54321)
-        self.assertEqual(game.comment, "[%emt 0:00:06.543]")
+        self.assertEqual(game.comments, ["[%emt 0:00:06.543]"])
         self.assertEqual(game.emt(), 6.543)
 
         game.set_emt(-70)
-        self.assertEqual(game.comment, "[%emt 0:00:00]")  # Clamped
+        self.assertEqual(game.comments, ["[%emt 0:00:00]"])  # Clamped
         self.assertEqual(game.emt(), 0)
 
     def test_float_clk(self):
         game = chess.pgn.Game()
-        game.comment = "[%clk 0:00:01.234]"
+        game.comments = ["[%clk 0:00:01.234]"]
         self.assertEqual(game.clock(), 1.234)
 
         game.set_clock(6.54321)
-        self.assertEqual(game.comment, "[%clk 0:00:06.543]")
+        self.assertEqual(game.comments, ["[%clk 0:00:06.543]"])
         self.assertEqual(game.clock(), 6.543)
 
         game.set_clock(-70)
-        self.assertEqual(game.comment, "[%clk 0:00:00]")  # Clamped
+        self.assertEqual(game.comments, ["[%clk 0:00:00]"])  # Clamped
         self.assertEqual(game.clock(), 0)
 
     def test_node_turn(self):

From 52dc00154d10c230c0aa6ce13299d7a0c825f19a Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sun, 26 May 2024 15:04:05 -0700
Subject: [PATCH 529/613] Convert map return type to list

---
 chess/pgn.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index b40ce257c..b999d79a6 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -1415,8 +1415,8 @@ def end_variation(self) -> None:
     def visit_comment(self, comment: Union[str, list[str]]) -> None:
         if self.comments and (self.variations or not self.variation_depth):
             def pgn_format(comments: list[str]) -> str:
-                comments = map(lambda s: s.replace("{", ""), comments)
-                comments = map(lambda s: s.replace("}", ""), comments)
+                comments = list(map(lambda s: s.replace("{", ""), comments))
+                comments = list(map(lambda s: s.replace("}", ""), comments))
                 return " ".join(f"{{ {comment} }}" for comment in comments if comment)
 
             comments = _standardize_comments(comment)

From 3b23452ee5728d1ec75e2cbf6f1c208e0416a9ee Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Sun, 26 May 2024 15:14:13 -0700
Subject: [PATCH 530/613] Remove tests of python list methods

---
 test.py | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/test.py b/test.py
index 92afd8de7..cf5439547 100755
--- a/test.py
+++ b/test.py
@@ -2227,13 +2227,6 @@ def test_read_game_with_multicomment_move(self):
         self.assertEqual(first_move.comments, ["A common opening"])
         second_move = first_move.variation(0)
         self.assertEqual(second_move.comments, ["A common response", "An uncommon comment"])
-        second_move.comments.pop()
-        self.assertEqual(second_move.comments, ["A common response"])
-        second_move.comments.append("A replaced comment")
-        multiple_comments = ["A common response", "A replaced comment"]
-        self.assertEqual(second_move.comments, multiple_comments)
-        second_move.comments.pop(0)
-        self.assertEqual(second_move.comments, ["A replaced comment"])
 
     def test_comment_at_eol(self):
         pgn = io.StringIO(textwrap.dedent("""\

From 3829d262c325b61b0004a314347f985008a9eb84 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 17 Jun 2024 21:18:43 +0200
Subject: [PATCH 531/613] Factor out Tablebase.add_file()

---
 chess/syzygy.py | 36 ++++++++++++++++--------------------
 1 file changed, 16 insertions(+), 20 deletions(-)

diff --git a/chess/syzygy.py b/chess/syzygy.py
index e1fe07eb7..0c7d41500 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -1511,27 +1511,23 @@ def add_directory(self, directory: str, *, load_wdl: bool = True, load_dtz: bool
 
         Returns the number of table files that were found.
         """
-        num = 0
         directory = os.path.abspath(directory)
-
-        for filename in os.listdir(directory):
-            path = os.path.join(directory, filename)
-            tablename, ext = os.path.splitext(filename)
-
-            if is_tablename(tablename, one_king=self.variant.one_king) and os.path.isfile(path):
-                if load_wdl:
-                    if ext == self.variant.tbw_suffix:
-                        num += self._open_table(self.wdl, WdlTable, path)
-                    elif "P" not in tablename and ext == self.variant.pawnless_tbw_suffix:
-                        num += self._open_table(self.wdl, WdlTable, path)
-
-                if load_dtz:
-                    if ext == self.variant.tbz_suffix:
-                        num += self._open_table(self.dtz, DtzTable, path)
-                    elif "P" not in tablename and ext == self.variant.pawnless_tbz_suffix:
-                        num += self._open_table(self.dtz, DtzTable, path)
-
-        return num
+        return sum(self.add_file(os.path.join(directory, filename), load_wdl=load_wdl, load_dtz=load_dtz) for filename in os.listdir(directory))
+
+    def add_file(self, path: str, *, load_wdl: bool = True, load_dtz: bool = True) -> int:
+        tablename, ext = os.path.splitext(os.path.basename(path))
+        if is_tablename(tablename, one_king=self.variant.one_king) and os.path.isfile(path):
+            if load_wdl:
+                if ext == self.variant.tbw_suffix:
+                    return self._open_table(self.wdl, WdlTable, path)
+                elif "P" not in tablename and ext == self.variant.pawnless_tbw_suffix:
+                    return self._open_table(self.wdl, WdlTable, path)
+            if load_dtz:
+                if ext == self.variant.tbz_suffix:
+                    return self._open_table(self.dtz, DtzTable, path)
+                elif "P" not in tablename and ext == self.variant.pawnless_tbz_suffix:
+                    return self._open_table(self.dtz, DtzTable, path)
+        return 0
 
     def probe_wdl_table(self, board: chess.Board) -> int:
         # Test for variant end.

From a41c3c88022fd97ab0eaf7b032a3158b69628b66 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 4 Jul 2024 16:41:19 +0200
Subject: [PATCH 532/613] Do not eagerly check syzygy max pieces (fixes #1093)

---
 chess/syzygy.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/syzygy.py b/chess/syzygy.py
index 0c7d41500..807b0922e 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -1546,6 +1546,8 @@ def probe_wdl_table(self, board: chess.Board) -> int:
         try:
             table = typing.cast(WdlTable, self.wdl[key])
         except KeyError:
+            if chess.popcount(board.occupied) > TBPIECES:
+                raise KeyError(f"syzygy tables support up to {TBPIECES} pieces, not {chess.popcount(board.occupied)}: {board.fen()}")
             raise MissingTableError(f"did not find wdl table {key}")
 
         self._bump_lru(table)
@@ -1558,8 +1560,6 @@ def probe_ab(self, board: chess.Board, alpha: int, beta: int, threats: bool = Fa
             raise KeyError(f"tablebase has been opened for {self.variant.uci_variant}, probed with: {board.uci_variant}")
         if board.castling_rights:
             raise KeyError(f"syzygy tables do not contain positions with castling rights: {board.fen()}")
-        if chess.popcount(board.occupied) > TBPIECES:
-            raise KeyError(f"syzygy tables support up to {TBPIECES} pieces, not {chess.popcount(board.occupied)}: {board.fen()}")
 
         # Special case: Variant with compulsory captures.
         if self.variant.captures_compulsory:

From 95803fc64a89307bfe51910f9e9349d120b81705 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 4 Jul 2024 20:58:32 +0200
Subject: [PATCH 533/613] Artificially limit syzygy ab search after relaxing
 bound

---
 chess/syzygy.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/chess/syzygy.py b/chess/syzygy.py
index 807b0922e..8ba1cbca4 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -1561,6 +1561,13 @@ def probe_ab(self, board: chess.Board, alpha: int, beta: int, threats: bool = Fa
         if board.castling_rights:
             raise KeyError(f"syzygy tables do not contain positions with castling rights: {board.fen()}")
 
+        # Probing resolves captures, so sometimes we can obtain results for
+        # positions that have more pieces than the maximum number of supported
+        # pieces. We artificially limit this to one additional level, to
+        # make sure search remains somewhat bounded.
+        if chess.popcount(board.occupied) > TBPIECES + 1:
+            raise KeyError(f"syzygy tables support up to {TBPIECES} pieces, not {chess.popcount(board.occupied)}: {board.fen()}")
+
         # Special case: Variant with compulsory captures.
         if self.variant.captures_compulsory:
             if board.is_variant_win():

From 474c87bfcccb8e2aa78a4a94414af3b747340f31 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 10 Jul 2024 18:02:09 +0200
Subject: [PATCH 534/613] Add another SAN disambiguation test
 (niklasf/shakmaty#77)

---
 test.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/test.py b/test.py
index 4ca3be6c2..00d766a03 100755
--- a/test.py
+++ b/test.py
@@ -703,6 +703,11 @@ def test_san(self):
         self.assertEqual(board.san(chess.Move.from_uci("h4g6")), "Nh4g6")
         self.assertEqual(board.fen(), fen)
 
+        # Test a bug where shakmaty used overly specific disambiguation.
+        fen = "8/2KN1p2/5p2/3N1B1k/5PNp/7P/7P/8 w - -"
+        board = chess.Board(fen)
+        self.assertEqual(board.san(chess.Move.from_uci("d5f6")), "N5xf6#")
+
         # Do not disambiguate illegal alternatives.
         fen = "8/8/8/R2nkn2/8/8/2K5/8 b - - 0 1"
         board = chess.Board(fen)

From ec8ecec5c0277691ec76041e82bf13140f7f719a Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Thu, 11 Jul 2024 16:03:22 +0200
Subject: [PATCH 535/613] chess-playground discontinued

---
 README.rst | 1 -
 1 file changed, 1 deletion(-)

diff --git a/README.rst b/README.rst
index c80957a37..a6c3185c6 100644
--- a/README.rst
+++ b/README.rst
@@ -350,7 +350,6 @@ If you like, share interesting things you are using python-chess for, for exampl
 * Django Rest Framework API for multiplayer chess – https://github.com/WorkShoft/capablanca-api
 * a `browser based PGN viewer `_ written in PyScript – https://github.com/nmstoker/ChessMatchViewer
 * an accessible chessboard that allows blind and visually impaired  players  to play chess against Stockfish – https://github.com/blindpandas/chessmart
-* analyse games to extract various statistics – https://github.com/mvrozanti/chess-playground
 * a web-based chess vision exercise – https://github.com/3d12/rookognition
 
 

From 63aac2ec65860a64256a190220b793e80b132b50 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 19 Jul 2024 16:31:22 +0200
Subject: [PATCH 536/613] Expose optional occupied parameter for attackers_mask
 (#1090)

---
 chess/__init__.py | 31 ++++++++++++++++++++++---------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index bed9eec5d..a90df9ef6 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -902,7 +902,9 @@ def attacks(self, square: Square) -> SquareSet:
         """
         return SquareSet(self.attacks_mask(square))
 
-    def _attackers_mask(self, color: Color, square: Square, occupied: Bitboard) -> Bitboard:
+    def attackers_mask(self, color: Color, square: Square, occupied: Optional[Bitboard] = None) -> Bitboard:
+        occupied = self.occupied if occupied is None else occupied
+
         rank_pieces = BB_RANK_MASKS[square] & occupied
         file_pieces = BB_FILE_MASKS[square] & occupied
         diag_pieces = BB_DIAG_MASKS[square] & occupied
@@ -920,27 +922,38 @@ def _attackers_mask(self, color: Color, square: Square, occupied: Bitboard) -> B
 
         return attackers & self.occupied_co[color]
 
-    def attackers_mask(self, color: Color, square: Square) -> Bitboard:
-        return self._attackers_mask(color, square, self.occupied)
-
-    def is_attacked_by(self, color: Color, square: Square) -> bool:
+    def is_attacked_by(self, color: Color, square: Square, occupied: Optional[IntoSquareSet] = None) -> bool:
         """
         Checks if the given side attacks the given square.
 
         Pinned pieces still count as attackers. Pawns that can be captured
         en passant are **not** considered attacked.
+
+        *occupied* determines which squares are considered to block attacks.
+        For example,
+        ``board.occupied ^ board.pieces_mask(chess.KING, board.turn)`` can be
+        used to consider X-ray attacks through the king.
+        Defaults to ``board.occupied`` (all pieces including the king,
+        no X-ray attacks).
         """
-        return bool(self.attackers_mask(color, square))
+        return bool(self.attackers_mask(color, square, None if occupied is None else SquareSet(occupied).mask))
 
-    def attackers(self, color: Color, square: Square) -> SquareSet:
+    def attackers(self, color: Color, square: Square, occupied: Optional[IntoSquareSet] = None) -> SquareSet:
         """
         Gets the set of attackers of the given color for the given square.
 
         Pinned pieces still count as attackers.
 
+        *occupied* determines which squares are considered to block attacks.
+        For example,
+        ``board.occupied ^ board.pieces_mask(chess.KING, board.turn)`` can be
+        used to consider X-ray attacks through the king.
+        Defaults to ``board.occupied`` (all pieces including the king,
+        no X-ray attacks).
+
         Returns a :class:`set of squares `.
         """
-        return SquareSet(self.attackers_mask(color, square))
+        return SquareSet(self.attackers_mask(color, square, None if occupied is None else SquareSet(occupied).mask))
 
     def pin_mask(self, color: Color, square: Square) -> Bitboard:
         king = self.king(color)
@@ -3723,7 +3736,7 @@ def generate_legal_captures(self, from_mask: Bitboard = BB_ALL, to_mask: Bitboar
             self.generate_legal_ep(from_mask, to_mask))
 
     def _attacked_for_king(self, path: Bitboard, occupied: Bitboard) -> bool:
-        return any(self._attackers_mask(not self.turn, sq, occupied) for sq in scan_reversed(path))
+        return any(self.attackers_mask(not self.turn, sq, occupied) for sq in scan_reversed(path))
 
     def generate_castling_moves(self, from_mask: Bitboard = BB_ALL, to_mask: Bitboard = BB_ALL) -> Iterator[Move]:
         if self.is_variant_end():

From 7836d446bf0cfc3b265e038fa381a7e52a543c41 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 19 Jul 2024 16:41:25 +0200
Subject: [PATCH 537/613] Add chess.svg.SvgWrapper._repr_html_() (closes #1096)

---
 chess/svg.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/chess/svg.py b/chess/svg.py
index d3d19e89e..2948b0b80 100644
--- a/chess/svg.py
+++ b/chess/svg.py
@@ -144,6 +144,9 @@ class SvgWrapper(str):
     def _repr_svg_(self) -> SvgWrapper:
         return self
 
+    def _repr_html_(self) -> SvgWrapper:
+        return self
+
 
 def _svg(viewbox: int, size: Optional[int]) -> ET.Element:
     svg = ET.Element("svg", {

From 247d8a06a6b2c2dc06f9ce0b7f3e94dbd9b816bd Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 19 Jul 2024 17:27:12 +0200
Subject: [PATCH 538/613] Update changelog for soon to be released final 1.x

---
 CHANGELOG.rst | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 0fa76effa..a4534badb 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -6,9 +6,26 @@ Upcoming in the next release
 
 Changes:
 
-* Dropped support for Python 3.7, which had reached its end of life.
-* `chess.engine.EventLoopPolicy` is no longer needed and now merely an alias
+* Drop support for Python 3.7, which has reached its end of life.
+* ``chess.engine.EventLoopPolicy`` is no longer needed and now merely an alias
   for the default event loop policy.
+* If available and requested via ``setpgrp``, use ``process_group`` support
+  from Python 3.11 for engine processes.
+* No longer eagerly reject 8 piece positions in ``chess.syzygy``, so that
+  some 8 piece positions with decisive captures can be probed successfully.
+* The string wrapper returned by ``chess.svg`` functions now also implements
+  ``_repr_html_``.
+
+New features:
+
+* Add ``chess.pgn.Game.time_control()`` and related data models.
+* Add model ``sf16.1`` for ``chess.engine.Score.wdl()``, the new default.
+
+Bugfixes:
+
+* Fix handling of whitespace in UCI engine communication.
+* For ``chess.Board.epd()`` and ``chess.Board.set_epd()``, require that EPD
+  opcodes start with a letter.
 
 New in v1.10.0 (27th Jul 2023)
 ------------------------------

From c7199a6354fe3053235c8ad88d79714afccdc0b9 Mon Sep 17 00:00:00 2001
From: Deepyaman Datta 
Date: Sun, 21 Jul 2024 22:42:48 -0600
Subject: [PATCH 539/613] Update default time control from UNKNOW to UNKNOWN

---
 chess/pgn.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 55eddbc29..0d0879ae0 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -143,7 +143,7 @@ class SkipType(enum.Enum):
 
 
 class TimeControlType(enum.Enum):
-    UNKNOW = 0
+    UNKNOWN = 0
     UNLIMITED = 1
     STANDARD = 2
     RAPID = 3
@@ -172,7 +172,7 @@ class TimeControl:
     """
 
     parts: list[TimeControlPart] = dataclasses.field(default_factory=list)
-    type: TimeControlType = TimeControlType.UNKNOW
+    type: TimeControlType = TimeControlType.UNKNOWN
 
 
 class _AcceptFrame:

From ad6f756c4406d66a59a9cd1050f50137de84dc30 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 31 Jul 2024 00:04:57 -0700
Subject: [PATCH 540/613] Factor out repeated annotation editing code

---
 chess/pgn.py | 31 ++++++++-----------------------
 1 file changed, 8 insertions(+), 23 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index b999d79a6..b8cfbe440 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -491,16 +491,7 @@ def set_eval(self, score: Optional[chess.engine.PovScore], depth: Optional[int]
             elif score.white().mate():
                 eval = f"[%eval #{score.white().mate()}{depth_suffix}]"
 
-        found = 0
-        for index in range(len(self.comments)):
-            self.comments[index], found = EVAL_REGEX.subn(_condense_affix(eval), self.comments[index], count=1)
-            if found:
-                break
-
-        self.comments = list(filter(None, self.comments))
-
-        if not found and eval:
-            self.comments.append(eval)
+        self._replace_or_add_annotation(eval, EVAL_REGEX)
 
     def arrows(self) -> List[chess.svg.Arrow]:
         """
@@ -573,16 +564,7 @@ def set_clock(self, seconds: Optional[float]) -> None:
             seconds_part = f"{seconds:06.3f}".rstrip("0").rstrip(".")
             clk = f"[%clk {hours:d}:{minutes:02d}:{seconds_part}]"
 
-        found = 0
-        for index in range(len(self.comments)):
-            self.comments[index], found = CLOCK_REGEX.subn(_condense_affix(clk), self.comments[index], count=1)
-            if found:
-                break
-
-        self.comments = list(filter(None, self.comments))
-
-        if not found and clk:
-            self.comments.append(clk)
+        self._replace_or_add_annotation(clk, CLOCK_REGEX)
 
     def emt(self) -> Optional[float]:
         """
@@ -611,16 +593,19 @@ def set_emt(self, seconds: Optional[float]) -> None:
             seconds_part = f"{seconds:06.3f}".rstrip("0").rstrip(".")
             emt = f"[%emt {hours:d}:{minutes:02d}:{seconds_part}]"
 
+        self._replace_or_add_annotation(emt, EMT_REGEX)
+
+    def _replace_or_add_annotation(self, text: str, regex: re.Pattern[str]) -> None:
         found = 0
         for index in range(len(self.comments)):
-            self.comments[index], found = EMT_REGEX.subn(_condense_affix(emt), self.comments[index], count=1)
+            self.comments[index], found = regex.subn(_condense_affix(text), self.comments[index], count=1)
             if found:
                 break
 
         self.comments = list(filter(None, self.comments))
 
-        if not found and emt:
-            self.comments.append(emt)
+        if not found and text:
+            self.comments.append(text)
 
     @abc.abstractmethod
     def accept(self, visitor: BaseVisitor[ResultT]) -> ResultT:

From 744d2fcae0b2c9d26007648099094b05475bb5cc Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 31 Jul 2024 00:48:02 -0700
Subject: [PATCH 541/613] Lazily remove curly braces from comments

---
 chess/pgn.py | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index c7d4a87a3..3acf66401 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -1400,9 +1400,8 @@ def end_variation(self) -> None:
     def visit_comment(self, comment: Union[str, list[str]]) -> None:
         if self.comments and (self.variations or not self.variation_depth):
             def pgn_format(comments: list[str]) -> str:
-                comments = list(map(lambda s: s.replace("{", ""), comments))
-                comments = list(map(lambda s: s.replace("}", ""), comments))
-                return " ".join(f"{{ {comment} }}" for comment in comments if comment)
+                edit = map(lambda s: s.replace("{", "").replace("}", ""), comments)
+                return " ".join(f"{{ {comment} }}" for comment in edit if comment)
 
             comments = _standardize_comments(comment)
             self.write_token(pgn_format(comments) + " ")

From dce369c6388805b5ac51c8b9b765e4da33f09795 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Wed, 31 Jul 2024 00:48:28 -0700
Subject: [PATCH 542/613] Add test for removing curly braces from comments

---
 test.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test.py b/test.py
index 23ecab2fc..2a4f551ea 100755
--- a/test.py
+++ b/test.py
@@ -2110,7 +2110,7 @@ def test_exporter(self):
         e4_c5.comments = ["Sicilian"]
 
         e4_d5_exd5 = e4_d5.add_main_variation(e4_d5.board().parse_san("exd5"))
-        e4_d5_exd5.comments = ["Best", "and the end of this example"]
+        e4_d5_exd5.comments = ["Best", "and the end of this {example}"]
 
         # Test string exporter with various options.
         exporter = chess.pgn.StringExporter(headers=False, comments=False, variations=False)

From dda9e8fedc75eefb0255245abff0782ecb26f882 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 31 Jul 2024 15:09:53 +0200
Subject: [PATCH 543/613] Refactor chess.engine.BaseCommand to pass stricter
 type checking

---
 chess/engine.py | 614 +++++++++++++++++++++++++++---------------------
 1 file changed, 344 insertions(+), 270 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index c2b470dd5..d1bbaaee1 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -24,6 +24,9 @@
 from types import TracebackType
 from typing import Any, Callable, Coroutine, Deque, Dict, Generator, Generic, Iterable, Iterator, List, Literal, Mapping, MutableMapping, Optional, Tuple, Type, TypedDict, TypeVar, Union
 
+if typing.TYPE_CHECKING:
+    from typing_extensions import Self
+
 WdlModel = Literal["sf", "sf16.1", "sf16", "sf15.1", "sf15", "sf14", "sf12", "lichess"]
 
 
@@ -895,7 +898,7 @@ class Protocol(asyncio.SubprocessProtocol, metaclass=abc.ABCMeta):
     returncode: asyncio.Future[int]
     """Future: Exit code of the process."""
 
-    def __init__(self: ProtocolT) -> None:
+    def __init__(self) -> None:
         self.loop = asyncio.get_running_loop()
         self.transport: Optional[asyncio.SubprocessTransport] = None
 
@@ -904,8 +907,8 @@ def __init__(self: ProtocolT) -> None:
             2: bytearray(),  # stderr
         }
 
-        self.command: Optional[BaseCommand[ProtocolT, Any]] = None
-        self.next_command: Optional[BaseCommand[ProtocolT, Any]] = None
+        self.command: Optional[BaseCommand[Any]] = None
+        self.next_command: Optional[BaseCommand[Any]] = None
 
         self.initialized = False
         self.returncode: asyncio.Future[int] = asyncio.Future()
@@ -915,7 +918,7 @@ def connection_made(self, transport: asyncio.BaseTransport) -> None:
         self.transport = transport  # type: ignore
         LOGGER.debug("%s: Connection made", self)
 
-    def connection_lost(self: ProtocolT, exc: Optional[Exception]) -> None:
+    def connection_lost(self, exc: Optional[Exception]) -> None:
         assert self.transport is not None
         code = self.transport.get_returncode()
         assert code is not None, "connect lost, but got no returncode"
@@ -923,10 +926,10 @@ def connection_lost(self: ProtocolT, exc: Optional[Exception]) -> None:
 
         # Terminate commands.
         if self.command is not None:
-            self.command._engine_terminated(self, code)
+            self.command._engine_terminated(code)
             self.command = None
         if self.next_command is not None:
-            self.next_command._engine_terminated(self, code)
+            self.next_command._engine_terminated(code)
             self.next_command = None
 
         self.returncode.set_result(code)
@@ -960,18 +963,18 @@ def pipe_data_received(self, fd: int, data: Union[bytes, str]) -> None:
     def error_line_received(self, line: str) -> None:
         LOGGER.warning("%s: stderr >> %s", self, line)
 
-    def _line_received(self: ProtocolT, line: str) -> None:
+    def _line_received(self: Protocol, line: str) -> None:
         LOGGER.debug("%s: >> %s", self, line)
 
         self.line_received(line)
 
         if self.command:
-            self.command._line_received(self, line)
+            self.command._line_received(line)
 
     def line_received(self, line: str) -> None:
         pass
 
-    async def communicate(self: ProtocolT, command_factory: Callable[[ProtocolT], BaseCommand[ProtocolT, T]]) -> T:
+    async def communicate(self, command_factory: Callable[[Self], BaseCommand[T]]) -> T:
         command = command_factory(self)
 
         if self.returncode.done():
@@ -993,18 +996,18 @@ def previous_command_finished(_: Optional[asyncio.Future[None]]) -> None:
 
                 def cancel_if_cancelled(result: asyncio.Future[T]) -> None:
                     if result.cancelled():
-                        cmd._cancel(self)
+                        cmd._cancel()
 
                 cmd.result.add_done_callback(cancel_if_cancelled)
                 cmd.finished.add_done_callback(previous_command_finished)
-                cmd._start(self)
+                cmd._start()
 
         if self.command is None:
             previous_command_finished(None)
         elif not self.command.result.done():
             self.command.result.cancel()
         elif not self.command.result.cancelled():
-            self.command._cancel(self)
+            self.command._cancel()
 
         return await command.result
 
@@ -1207,32 +1210,34 @@ class CommandState(enum.Enum):
     DONE = enum.auto()
 
 
-class BaseCommand(Generic[ProtocolT, T]):
-    def __init__(self, engine: ProtocolT) -> None:
+class BaseCommand(Generic[T]):
+    def __init__(self, engine: Protocol) -> None:
+        self._engine = engine
+
         self.state = CommandState.NEW
 
         self.result: asyncio.Future[T] = asyncio.Future()
         self.finished: asyncio.Future[None] = asyncio.Future()
 
-    def _engine_terminated(self, engine: ProtocolT, code: int) -> None:
+    def _engine_terminated(self, code: int) -> None:
         hint = ", binary not compatible with cpu?" if code in [-4, 0xc000001d] else ""
         exc = EngineTerminatedError(f"engine process died unexpectedly (exit code: {code}{hint})")
         if self.state == CommandState.ACTIVE:
-            self.engine_terminated(engine, exc)
+            self.engine_terminated(exc)
         elif self.state == CommandState.CANCELLING:
             self.finished.set_result(None)
         elif self.state == CommandState.NEW:
-            self._handle_exception(engine, exc)
+            self._handle_exception(exc)
 
-    def _handle_exception(self, engine: ProtocolT, exc: Exception) -> None:
+    def _handle_exception(self, exc: Exception) -> None:
         if not self.result.done():
             self.result.set_exception(exc)
         else:
-            engine.loop.call_exception_handler({
+            self._engine.loop.call_exception_handler({ # XXX
                 "message": f"{type(self).__name__} failed after returning preliminary result ({self.result!r})",
                 "exception": exc,
-                "protocol": engine,
-                "transport": engine.transport,
+                "protocol": self._engine,
+                "transport": self._engine.transport,
             })
 
         if not self.finished.done():
@@ -1245,43 +1250,43 @@ def set_finished(self) -> None:
         self.finished.set_result(None)
         self.state = CommandState.DONE
 
-    def _cancel(self, engine: ProtocolT) -> None:
+    def _cancel(self) -> None:
         if self.state != CommandState.CANCELLING and self.state != CommandState.DONE:
             assert self.state == CommandState.ACTIVE
             self.state = CommandState.CANCELLING
-            self.cancel(engine)
+            self.cancel()
 
-    def _start(self, engine: ProtocolT) -> None:
+    def _start(self) -> None:
         assert self.state == CommandState.NEW
         self.state = CommandState.ACTIVE
         try:
-            self.check_initialized(engine)
-            self.start(engine)
+            self.check_initialized()
+            self.start()
         except EngineError as err:
-            self._handle_exception(engine, err)
+            self._handle_exception(err)
 
-    def _line_received(self, engine: ProtocolT, line: str) -> None:
+    def _line_received(self, line: str) -> None:
         assert self.state in [CommandState.ACTIVE, CommandState.CANCELLING]
         try:
-            self.line_received(engine, line)
+            self.line_received(line)
         except EngineError as err:
-            self._handle_exception(engine, err)
+            self._handle_exception(err)
 
-    def cancel(self, engine: ProtocolT) -> None:
+    def cancel(self) -> None:
         pass
 
-    def check_initialized(self, engine: ProtocolT) -> None:
-        if not engine.initialized:
+    def check_initialized(self) -> None:
+        if not self._engine.initialized:
             raise EngineError("tried to run command, but engine is not initialized")
 
-    def start(self, engine: ProtocolT) -> None:
+    def start(self) -> None:
         raise NotImplementedError
 
-    def line_received(self, engine: ProtocolT, line: str) -> None:
+    def line_received(self, line: str) -> None:
         pass
 
-    def engine_terminated(self, engine: ProtocolT, exc: Exception) -> None:
-        self._handle_exception(engine, exc)
+    def engine_terminated(self, exc: Exception) -> None:
+        self._handle_exception(exc)
 
     def __repr__(self) -> str:
         return "<{} at {:#x} (state={}, result={}, finished={}>".format(type(self).__name__, id(self), self.state, self.result, self.finished)
@@ -1307,26 +1312,33 @@ def __init__(self) -> None:
         self.ponderhit = False
 
     async def initialize(self) -> None:
-        class UciInitializeCommand(BaseCommand[UciProtocol, None]):
-            def check_initialized(self, engine: UciProtocol) -> None:
-                if engine.initialized:
+        class UciInitializeCommand(BaseCommand[None]):
+            def __init__(self, engine: UciProtocol):
+                super().__init__(engine)
+                self.engine = engine
+
+            @typing.override
+            def check_initialized(self) -> None:
+                if self.engine.initialized:
                     raise EngineError("engine already initialized")
 
-            def start(self, engine: UciProtocol) -> None:
-                engine.send_line("uci")
+            @typing.override
+            def start(self) -> None:
+                self.engine.send_line("uci")
 
-            def line_received(self, engine: UciProtocol, line: str) -> None:
+            @typing.override
+            def line_received(self, line: str) -> None:
                 token, remaining = _next_token(line)
                 if line.strip() == "uciok" and not self.result.done():
-                    engine.initialized = True
+                    self.engine.initialized = True
                     self.result.set_result(None)
                     self.set_finished()
                 elif token == "option":
-                    self._option(engine, remaining)
+                    self._option(remaining)
                 elif token == "id":
-                    self._id(engine, remaining)
+                    self._id(remaining)
 
-            def _option(self, engine: UciProtocol, arg: str) -> None:
+            def _option(self, arg: str) -> None:
                 current_parameter = None
                 option_parts: dict[str, str] = {k: "" for k in ["name", "type", "default", "min", "max"]}
                 var = []
@@ -1357,16 +1369,16 @@ def parse_min_max_value(option_parts: dict[str, str], which: Literal["min", "max
 
                 without_default = Option(name, type, None, min, max, var)
                 option = Option(without_default.name, without_default.type, without_default.parse(default), min, max, var)
-                engine.options[option.name] = option
+                self.engine.options[option.name] = option
 
                 if option.default is not None:
-                    engine.config[option.name] = option.default
+                    self.engine.config[option.name] = option.default
                 if option.default is not None and not option.is_managed() and option.name.lower() != "uci_analysemode":
-                    engine.target_config[option.name] = option.default
+                    self.engine.target_config[option.name] = option.default
 
-            def _id(self, engine: UciProtocol, arg: str) -> None:
+            def _id(self, arg: str) -> None:
                 key, value = _next_token(arg)
-                engine.id[key] = value.strip()
+                self.engine.id[key] = value.strip()
 
         return await self.communicate(UciInitializeCommand)
 
@@ -1395,16 +1407,21 @@ def debug(self, on: bool = True) -> None:
             self.send_line("debug off")
 
     async def ping(self) -> None:
-        class UciPingCommand(BaseCommand[UciProtocol, None]):
-            def start(self, engine: UciProtocol) -> None:
-                engine._isready()
+        class UciPingCommand(BaseCommand[None]):
+            def __init__(self, engine: UciProtocol) -> None:
+                super().__init__(engine)
+                self.engine =  engine
 
-            def line_received(self, engine: UciProtocol, line: str) -> None:
+            def start(self) -> None:
+                self.engine._isready()
+
+            @typing.override
+            def line_received(self, line: str) -> None:
                 if line.strip() == "readyok":
                     self.result.set_result(None)
                     self.set_finished()
                 else:
-                    LOGGER.warning("%s: Unexpected engine output: %r", engine, line)
+                    LOGGER.warning("%s: Unexpected engine output: %r", self.engine, line)
 
         return await self.communicate(UciPingCommand)
 
@@ -1438,10 +1455,14 @@ def _configure(self, options: ConfigMapping) -> None:
             self._setoption(name, value)
 
     async def configure(self, options: ConfigMapping) -> None:
-        class UciConfigureCommand(BaseCommand[UciProtocol, None]):
-            def start(self, engine: UciProtocol) -> None:
-                engine._configure(options)
-                engine.target_config.update({name: value for name, value in options.items() if value is not None})
+        class UciConfigureCommand(BaseCommand[None]):
+            def __init__(self, engine: UciProtocol):
+                super().__init__(engine)
+                self.engine = engine
+
+            def start(self) -> None:
+                self.engine._configure(options)
+                self.engine.target_config.update({name: value for name, value in options.items() if value is not None})
                 self.result.set_result(None)
                 self.set_finished()
 
@@ -1541,77 +1562,82 @@ async def play(self, board: chess.Board, limit: Limit, *, game: object = None, i
             new_options[name] = value
         new_options.update(self._opponent_configuration(opponent=opponent))
 
-        class UciPlayCommand(BaseCommand[UciProtocol, PlayResult]):
+        engine = self
+
+        class UciPlayCommand(BaseCommand[PlayResult]):
             def __init__(self, engine: UciProtocol):
                 super().__init__(engine)
+                self.engine = engine
 
                 # May ponderhit only in the same game and with unchanged target
                 # options. The managed options UCI_AnalyseMode, Ponder, and
                 # MultiPV never change between pondering play commands.
                 engine.may_ponderhit = board if ponder and not engine.first_game and game == engine.game and not engine._changed_options(new_options) else None
 
-            def start(self, engine: UciProtocol) -> None:
+            @typing.override
+            def start(self) -> None:
                 self.info: InfoDict = {}
                 self.pondering: Optional[chess.Board] = None
                 self.sent_isready = False
                 self.start_time = time.perf_counter()
 
-                if engine.ponderhit:
-                    engine.ponderhit = False
-                    engine.send_line("ponderhit")
+                if self.engine.ponderhit:
+                    self.engine.ponderhit = False
+                    self.engine.send_line("ponderhit")
                     return
 
-                if "UCI_AnalyseMode" in engine.options and "UCI_AnalyseMode" not in engine.target_config and all(name.lower() != "uci_analysemode" for name in new_options):
-                    engine._setoption("UCI_AnalyseMode", False)
-                if "Ponder" in engine.options:
-                    engine._setoption("Ponder", ponder)
-                if "MultiPV" in engine.options:
-                    engine._setoption("MultiPV", engine.options["MultiPV"].default)
+                if "UCI_AnalyseMode" in self.engine.options and "UCI_AnalyseMode" not in self.engine.target_config and all(name.lower() != "uci_analysemode" for name in new_options):
+                    self.engine._setoption("UCI_AnalyseMode", False)
+                if "Ponder" in self.engine.options:
+                    self.engine._setoption("Ponder", ponder)
+                if "MultiPV" in self.engine.options:
+                    self.engine._setoption("MultiPV", self.engine.options["MultiPV"].default)
 
-                new_opponent = new_options.get("UCI_Opponent") or engine.target_config.get("UCI_Opponent")
-                opponent_changed = new_opponent != engine.config.get("UCI_Opponent")
-                engine._configure(new_options)
+                new_opponent = new_options.get("UCI_Opponent") or self.engine.target_config.get("UCI_Opponent")
+                opponent_changed = new_opponent != self.engine.config.get("UCI_Opponent")
+                self.engine._configure(new_options)
 
-                if engine.first_game or engine.game != game or opponent_changed:
-                    engine.game = game
-                    engine._ucinewgame()
+                if self.engine.first_game or self.engine.game != game or opponent_changed:
+                    self.engine.game = game
+                    self.engine._ucinewgame()
                     self.sent_isready = True
-                    engine._isready()
+                    self.engine._isready()
                 else:
-                    self._readyok(engine)
+                    self._readyok()
 
-            def line_received(self, engine: UciProtocol, line: str) -> None:
+            @typing.override
+            def line_received(self, line: str) -> None:
                 token, remaining = _next_token(line)
                 if token == "info":
-                    self._info(engine, remaining)
+                    self._info(remaining)
                 elif token == "bestmove":
-                    self._bestmove(engine, remaining)
+                    self._bestmove(remaining)
                 elif line.strip() == "readyok" and self.sent_isready:
-                    self._readyok(engine)
+                    self._readyok()
                 else:
-                    LOGGER.warning("%s: Unexpected engine output: %r", engine, line)
+                    LOGGER.warning("%s: Unexpected engine output: %r", self.engine, line)
 
-            def _readyok(self, engine: UciProtocol) -> None:
+            def _readyok(self) -> None:
                 self.sent_isready = False
                 engine._position(board)
                 engine._go(limit, root_moves=root_moves)
 
-            def _info(self, engine: UciProtocol, arg: str) -> None:
+            def _info(self, arg: str) -> None:
                 if not self.pondering:
-                    self.info.update(_parse_uci_info(arg, engine.board, info))
+                    self.info.update(_parse_uci_info(arg, self.engine.board, info))
 
-            def _bestmove(self, engine: UciProtocol, arg: str) -> None:
+            def _bestmove(self, arg: str) -> None:
                 if self.pondering:
                     self.pondering = None
                 elif not self.result.cancelled():
-                    best = _parse_uci_bestmove(engine.board, arg)
+                    best = _parse_uci_bestmove(self.engine.board, arg)
                     self.result.set_result(PlayResult(best.move, best.ponder, self.info))
 
                     if ponder and best.move and best.ponder:
                         self.pondering = board.copy()
                         self.pondering.push(best.move)
                         self.pondering.push(best.ponder)
-                        engine._position(self.pondering)
+                        self.engine._position(self.pondering)
 
                         # Adjust clocks for pondering.
                         time_used = time.perf_counter() - self.start_time
@@ -1627,89 +1653,98 @@ def _bestmove(self, engine: UciProtocol, arg: str) -> None:
                         if ponder_limit.remaining_moves:
                             ponder_limit.remaining_moves -= 1
 
-                        engine._go(ponder_limit, ponder=True)
+                        self.engine._go(ponder_limit, ponder=True)
 
                 if not self.pondering:
-                    self.end(engine)
+                    self.end()
 
-            def end(self, engine: UciProtocol) -> None:
+            def end(self) -> None:
                 engine.may_ponderhit = None
                 self.set_finished()
 
-            def cancel(self, engine: UciProtocol) -> None:
-                if engine.may_ponderhit and self.pondering and engine.may_ponderhit.move_stack == self.pondering.move_stack and engine.may_ponderhit == self.pondering:
-                    engine.ponderhit = True
-                    self.end(engine)
+            @typing.override
+            def cancel(self) -> None:
+                if self.engine.may_ponderhit and self.pondering and self.engine.may_ponderhit.move_stack == self.pondering.move_stack and self.engine.may_ponderhit == self.pondering:
+                    self.engine.ponderhit = True
+                    self.end()
                 else:
-                    engine.send_line("stop")
+                    self.engine.send_line("stop")
 
-            def engine_terminated(self, engine: UciProtocol, exc: Exception) -> None:
+            @typing.override
+            def engine_terminated(self, exc: Exception) -> None:
                 # Allow terminating engine while pondering.
                 if not self.result.done():
-                    super().engine_terminated(engine, exc)
+                    super().engine_terminated(exc)
 
         return await self.communicate(UciPlayCommand)
 
     async def analysis(self, board: chess.Board, limit: Optional[Limit] = None, *, multipv: Optional[int] = None, game: object = None, info: Info = INFO_ALL, root_moves: Optional[Iterable[chess.Move]] = None, options: ConfigMapping = {}) -> AnalysisResult:
-        class UciAnalysisCommand(BaseCommand[UciProtocol, AnalysisResult]):
-            def start(self, engine: UciProtocol) -> None:
-                self.analysis = AnalysisResult(stop=lambda: self.cancel(engine))
+        class UciAnalysisCommand(BaseCommand[AnalysisResult]):
+            def __init__(self, engine: UciProtocol):
+                super().__init__(engine)
+                self.engine = engine
+
+            def start(self) -> None:
+                self.analysis = AnalysisResult(stop=lambda: self.cancel())
                 self.sent_isready = False
 
-                if "Ponder" in engine.options:
-                    engine._setoption("Ponder", False)
-                if "UCI_AnalyseMode" in engine.options and "UCI_AnalyseMode" not in engine.target_config and all(name.lower() != "uci_analysemode" for name in options):
-                    engine._setoption("UCI_AnalyseMode", True)
-                if "MultiPV" in engine.options or (multipv and multipv > 1):
-                    engine._setoption("MultiPV", 1 if multipv is None else multipv)
+                if "Ponder" in self.engine.options:
+                    self.engine._setoption("Ponder", False)
+                if "UCI_AnalyseMode" in self.engine.options and "UCI_AnalyseMode" not in self.engine.target_config and all(name.lower() != "uci_analysemode" for name in options):
+                    self.engine._setoption("UCI_AnalyseMode", True)
+                if "MultiPV" in self.engine.options or (multipv and multipv > 1):
+                    self.engine._setoption("MultiPV", 1 if multipv is None else multipv)
 
-                engine._configure(options)
+                self.engine._configure(options)
 
-                if engine.first_game or engine.game != game:
-                    engine.game = game
-                    engine._ucinewgame()
+                if self.engine.first_game or self.engine.game != game:
+                    self.engine.game = game
+                    self.engine._ucinewgame()
                     self.sent_isready = True
-                    engine._isready()
+                    self.engine._isready()
                 else:
-                    self._readyok(engine)
+                    self._readyok()
 
-            def line_received(self, engine: UciProtocol, line: str) -> None:
+            @typing.override
+            def line_received(self, line: str) -> None:
                 token, remaining = _next_token(line)
                 if token == "info":
-                    self._info(engine, remaining)
+                    self._info(remaining)
                 elif token == "bestmove":
-                    self._bestmove(engine, remaining)
+                    self._bestmove(remaining)
                 elif line.strip() == "readyok" and self.sent_isready:
-                    self._readyok(engine)
+                    self._readyok()
                 else:
-                    LOGGER.warning("%s: Unexpected engine output: %r", engine, line)
+                    LOGGER.warning("%s: Unexpected engine output: %r", self.engine, line)
 
-            def _readyok(self, engine: UciProtocol) -> None:
+            def _readyok(self) -> None:
                 self.sent_isready = False
-                engine._position(board)
+                self.engine._position(board)
 
                 if limit:
-                    engine._go(limit, root_moves=root_moves)
+                    self.engine._go(limit, root_moves=root_moves)
                 else:
-                    engine._go(Limit(), root_moves=root_moves, infinite=True)
+                    self.engine._go(Limit(), root_moves=root_moves, infinite=True)
 
                 self.result.set_result(self.analysis)
 
-            def _info(self, engine: UciProtocol, arg: str) -> None:
-                self.analysis.post(_parse_uci_info(arg, engine.board, info))
+            def _info(self, arg: str) -> None:
+                self.analysis.post(_parse_uci_info(arg, self.engine.board, info))
 
-            def _bestmove(self, engine: UciProtocol, arg: str) -> None:
+            def _bestmove(self, arg: str) -> None:
                 if not self.result.done():
                     raise EngineError("was not searching, but engine sent bestmove")
-                best = _parse_uci_bestmove(engine.board, arg)
+                best = _parse_uci_bestmove(self.engine.board, arg)
                 self.set_finished()
                 self.analysis.set_finished(best)
 
-            def cancel(self, engine: UciProtocol) -> None:
-                engine.send_line("stop")
+            @typing.override
+            def cancel(self) -> None:
+                self.engine.send_line("stop")
 
-            def engine_terminated(self, engine: UciProtocol, exc: Exception) -> None:
-                LOGGER.debug("%s: Closing analysis because engine has been terminated (error: %s)", engine, exc)
+            @typing.override
+            def engine_terminated(self, exc: Exception) -> None:
+                LOGGER.debug("%s: Closing analysis because engine has been terminated (error: %s)", self.engine, exc)
                 self.analysis.set_exception(exc)
 
         return await self.communicate(UciAnalysisCommand)
@@ -1938,89 +1973,96 @@ def __init__(self) -> None:
         self.first_game = True
 
     async def initialize(self) -> None:
-        class XBoardInitializeCommand(BaseCommand[XBoardProtocol, None]):
-            def check_initialized(self, engine: XBoardProtocol) -> None:
-                if engine.initialized:
+        class XBoardInitializeCommand(BaseCommand[None]):
+            def __init__(self, engine: XBoardProtocol):
+                super().__init__(engine)
+                self.engine = engine
+
+            @typing.override
+            def check_initialized(self) -> None:
+                if self.engine.initialized:
                     raise EngineError("engine already initialized")
 
-            def start(self, engine: XBoardProtocol) -> None:
-                engine.send_line("xboard")
-                engine.send_line("protover 2")
-                self.timeout_handle = engine.loop.call_later(2.0, lambda: self.timeout(engine))
+            @typing.override
+            def start(self) -> None:
+                self.engine.send_line("xboard")
+                self.engine.send_line("protover 2")
+                self.timeout_handle = self.engine.loop.call_later(2.0, lambda: self.timeout())
 
-            def timeout(self, engine: XBoardProtocol) -> None:
-                LOGGER.error("%s: Timeout during initialization", engine)
-                self.end(engine)
+            def timeout(self) -> None:
+                LOGGER.error("%s: Timeout during initialization", self.engine)
+                self.end()
 
-            def line_received(self, engine: XBoardProtocol, line: str) -> None:
+            @typing.override
+            def line_received(self, line: str) -> None:
                 token, remaining = _next_token(line)
                 if token.startswith("#"):
                     pass
                 elif token == "feature":
-                    self._feature(engine, remaining)
+                    self._feature(remaining)
                 elif XBOARD_ERROR_REGEX.match(line):
                     raise EngineError(line)
 
-            def _feature(self, engine: XBoardProtocol, arg: str) -> None:
+            def _feature(self, arg: str) -> None:
                 for feature in shlex.split(arg):
                     key, value = feature.split("=", 1)
                     if key == "option":
                         option = _parse_xboard_option(value)
                         if option.name not in ["random", "computer", "cores", "memory"]:
-                            engine.options[option.name] = option
+                            self.engine.options[option.name] = option
                     else:
                         try:
-                            engine.features[key] = int(value)
+                            self.engine.features[key] = int(value)
                         except ValueError:
-                            engine.features[key] = value
+                            self.engine.features[key] = value
 
-                if "done" in engine.features:
+                if "done" in self.engine.features:
                     self.timeout_handle.cancel()
-                if engine.features.get("done"):
-                    self.end(engine)
+                if self.engine.features.get("done"):
+                    self.end()
 
-            def end(self, engine: XBoardProtocol) -> None:
-                if not engine.features.get("ping", 0):
+            def end(self) -> None:
+                if not self.engine.features.get("ping", 0):
                     self.result.set_exception(EngineError("xboard engine did not declare required feature: ping"))
                     self.set_finished()
                     return
-                if not engine.features.get("setboard", 0):
+                if not self.engine.features.get("setboard", 0):
                     self.result.set_exception(EngineError("xboard engine did not declare required feature: setboard"))
                     self.set_finished()
                     return
 
-                if not engine.features.get("reuse", 1):
-                    LOGGER.warning("%s: Rejecting feature reuse=0", engine)
-                    engine.send_line("rejected reuse")
-                if not engine.features.get("sigterm", 1):
-                    LOGGER.warning("%s: Rejecting feature sigterm=0", engine)
-                    engine.send_line("rejected sigterm")
-                if engine.features.get("san", 0):
-                    LOGGER.warning("%s: Rejecting feature san=1", engine)
-                    engine.send_line("rejected san")
-
-                if "myname" in engine.features:
-                    engine.id["name"] = str(engine.features["myname"])
-
-                if engine.features.get("memory", 0):
-                    engine.options["memory"] = Option("memory", "spin", 16, 1, None, None)
-                    engine.send_line("accepted memory")
-                if engine.features.get("smp", 0):
-                    engine.options["cores"] = Option("cores", "spin", 1, 1, None, None)
-                    engine.send_line("accepted smp")
-                if engine.features.get("egt"):
-                    for egt in str(engine.features["egt"]).split(","):
+                if not self.engine.features.get("reuse", 1):
+                    LOGGER.warning("%s: Rejecting feature reuse=0", self.engine)
+                    self.engine.send_line("rejected reuse")
+                if not self.engine.features.get("sigterm", 1):
+                    LOGGER.warning("%s: Rejecting feature sigterm=0", self.engine)
+                    self.engine.send_line("rejected sigterm")
+                if self.engine.features.get("san", 0):
+                    LOGGER.warning("%s: Rejecting feature san=1", self.engine)
+                    self.engine.send_line("rejected san")
+
+                if "myname" in self.engine.features:
+                    self.engine.id["name"] = str(self.engine.features["myname"])
+
+                if self.engine.features.get("memory", 0):
+                    self.engine.options["memory"] = Option("memory", "spin", 16, 1, None, None)
+                    self.engine.send_line("accepted memory")
+                if self.engine.features.get("smp", 0):
+                    self.engine.options["cores"] = Option("cores", "spin", 1, 1, None, None)
+                    self.engine.send_line("accepted smp")
+                if self.engine.features.get("egt"):
+                    for egt in str(self.engine.features["egt"]).split(","):
                         name = f"egtpath {egt}"
-                        engine.options[name] = Option(name, "path", None, None, None, None)
-                    engine.send_line("accepted egt")
+                        self.engine.options[name] = Option(name, "path", None, None, None, None)
+                    self.engine.send_line("accepted egt")
 
-                for option in engine.options.values():
+                for option in self.engine.options.values():
                     if option.default is not None:
-                        engine.config[option.name] = option.default
+                        self.engine.config[option.name] = option.default
                     if option.default is not None and not option.is_managed():
-                        engine.target_config[option.name] = option.default
+                        self.engine.target_config[option.name] = option.default
 
-                engine.initialized = True
+                self.engine.initialized = True
                 self.result.set_result(None)
                 self.set_finished()
 
@@ -2105,18 +2147,24 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping, opponen
             self.board.push(move)
 
     async def ping(self) -> None:
-        class XBoardPingCommand(BaseCommand[XBoardProtocol, None]):
-            def start(self, engine: XBoardProtocol) -> None:
+        class XBoardPingCommand(BaseCommand[None]):
+            def __init__(self, engine: XBoardProtocol):
+                super().__init__(engine)
+                self.engine = engine
+
+            @typing.override
+            def start(self) -> None:
                 n = id(self) & 0xffff
                 self.pong = f"pong {n}"
-                engine._ping(n)
+                self.engine._ping(n)
 
-            def line_received(self, engine: XBoardProtocol, line: str) -> None:
+            @typing.override
+            def line_received(self, line: str) -> None:
                 if line == self.pong:
                     self.result.set_result(None)
                     self.set_finished()
                 elif not line.startswith("#"):
-                    LOGGER.warning("%s: Unexpected engine output: %r", engine, line)
+                    LOGGER.warning("%s: Unexpected engine output: %r", self.engine, line)
                 elif XBOARD_ERROR_REGEX.match(line):
                     raise EngineError(line)
 
@@ -2126,54 +2174,60 @@ async def play(self, board: chess.Board, limit: Limit, *, game: object = None, i
         if root_moves is not None:
             raise EngineError("play with root_moves, but xboard supports 'include' only in analysis mode")
 
-        class XBoardPlayCommand(BaseCommand[XBoardProtocol, PlayResult]):
-            def start(self, engine: XBoardProtocol) -> None:
+        class XBoardPlayCommand(BaseCommand[PlayResult]):
+            def __init__(self, engine: XBoardProtocol):
+                super().__init__(engine)
+                self.engine = engine
+
+            @typing.override
+            def start(self) -> None:
                 self.play_result = PlayResult(None, None)
                 self.stopped = False
                 self.pong_after_move: Optional[str] = None
                 self.pong_after_ponder: Optional[str] = None
 
                 # Set game, position and configure.
-                engine._new(board, game, options, opponent)
+                self.engine._new(board, game, options, opponent)
 
                 # Limit or time control.
                 clock = limit.white_clock if board.turn else limit.black_clock
                 increment = limit.white_inc if board.turn else limit.black_inc
-                if limit.clock_id is None or limit.clock_id != engine.clock_id:
-                    self._send_time_control(engine, clock, increment)
-                engine.clock_id = limit.clock_id
+                if limit.clock_id is None or limit.clock_id != self.engine.clock_id:
+                    self._send_time_control(clock, increment)
+                self.engine.clock_id = limit.clock_id
                 if limit.nodes is not None:
                     if limit.time is not None or limit.white_clock is not None or limit.black_clock is not None or increment is not None:
                         raise EngineError("xboard does not support mixing node limits with time limits")
 
-                    if "nps" not in engine.features:
+                    if "nps" not in self.engine.features:
                         LOGGER.warning("%s: Engine did not explicitly declare support for node limits (feature nps=?)")
-                    elif not engine.features["nps"]:
+                    elif not self.engine.features["nps"]:
                         raise EngineError("xboard engine does not support node limits (feature nps=0)")
 
-                    engine.send_line("nps 1")
-                    engine.send_line(f"st {max(1, int(limit.nodes))}")
+                    self.engine.send_line("nps 1")
+                    self.engine.send_line(f"st {max(1, int(limit.nodes))}")
                 if limit.depth is not None:
-                    engine.send_line(f"sd {max(1, int(limit.depth))}")
+                    self.engine.send_line(f"sd {max(1, int(limit.depth))}")
                 if limit.white_clock is not None:
-                    engine.send_line("{} {}".format("time" if board.turn else "otim", max(1, round(limit.white_clock * 100))))
+                    self.engine.send_line("{} {}".format("time" if board.turn else "otim", max(1, round(limit.white_clock * 100))))
                 if limit.black_clock is not None:
-                    engine.send_line("{} {}".format("otim" if board.turn else "time", max(1, round(limit.black_clock * 100))))
+                    self.engine.send_line("{} {}".format("otim" if board.turn else "time", max(1, round(limit.black_clock * 100))))
 
-                if draw_offered and engine.features.get("draw", 1):
-                    engine.send_line("draw")
+                if draw_offered and self.engine.features.get("draw", 1):
+                    self.engine.send_line("draw")
 
                 # Start thinking.
-                engine.send_line("post" if info else "nopost")
-                engine.send_line("hard" if ponder else "easy")
-                engine.send_line("go")
+                self.engine.send_line("post" if info else "nopost")
+                self.engine.send_line("hard" if ponder else "easy")
+                self.engine.send_line("go")
 
-            def line_received(self, engine: XBoardProtocol, line: str) -> None:
+            @typing.override
+            def line_received(self, line: str) -> None:
                 token, remaining = _next_token(line)
                 if token == "move":
-                    self._move(engine, remaining.strip())
+                    self._move(remaining.strip())
                 elif token == "Hint:":
-                    self._hint(engine, remaining.strip())
+                    self._hint(remaining.strip())
                 elif token == "pong":
                     pong_line = f"{token} {remaining.strip()}"
                     if pong_line == self.pong_after_move:
@@ -2188,84 +2242,86 @@ def line_received(self, engine: XBoardProtocol, line: str) -> None:
                 elif f"{token} {remaining.strip()}" == "offer draw":
                     if not self.result.done():
                         self.play_result.draw_offered = True
-                    self._ping_after_move(engine)
+                    self._ping_after_move()
                 elif line.strip() == "resign":
                     if not self.result.done():
                         self.play_result.resigned = True
-                    self._ping_after_move(engine)
+                    self._ping_after_move()
                 elif token in ["1-0", "0-1", "1/2-1/2"]:
                     if "resign" in line and not self.result.done():
                         self.play_result.resigned = True
-                    self._ping_after_move(engine)
+                    self._ping_after_move()
                 elif token.startswith("#"):
                     pass
                 elif XBOARD_ERROR_REGEX.match(line):
-                    engine.first_game = True  # Board state might no longer be in sync
+                    self.engine.first_game = True  # Board state might no longer be in sync
                     raise EngineError(line)
                 elif len(line.split()) >= 4 and line.lstrip()[0].isdigit():
-                    self._post(engine, line)
+                    self._post(line)
                 else:
-                    LOGGER.warning("%s: Unexpected engine output: %r", engine, line)
+                    LOGGER.warning("%s: Unexpected engine output: %r", self.engine, line)
 
-            def _send_time_control(self, engine: XBoardProtocol, clock: Optional[float], increment: Optional[float]) -> None:
+            def _send_time_control(self, clock: Optional[float], increment: Optional[float]) -> None:
                 if limit.remaining_moves or clock is not None or increment is not None:
                     base_mins, base_secs = divmod(int(clock or 0), 60)
-                    engine.send_line(f"level {limit.remaining_moves or 0} {base_mins}:{base_secs:02d} {increment or 0}")
+                    self.engine.send_line(f"level {limit.remaining_moves or 0} {base_mins}:{base_secs:02d} {increment or 0}")
                 if limit.time is not None:
-                    engine.send_line(f"st {max(0.01, limit.time)}")
+                    self.engine.send_line(f"st {max(0.01, limit.time)}")
 
-            def _post(self, engine: XBoardProtocol, line: str) -> None:
+            def _post(self, line: str) -> None:
                 if not self.result.done():
-                    self.play_result.info = _parse_xboard_post(line, engine.board, info)
+                    self.play_result.info = _parse_xboard_post(line, self.engine.board, info)
 
-            def _move(self, engine: XBoardProtocol, arg: str) -> None:
+            def _move(self, arg: str) -> None:
                 if not self.result.done() and self.play_result.move is None:
                     try:
-                        self.play_result.move = engine.board.push_xboard(arg)
+                        self.play_result.move = self.engine.board.push_xboard(arg)
                     except ValueError as err:
                         self.result.set_exception(EngineError(err))
                     else:
-                        self._ping_after_move(engine)
+                        self._ping_after_move()
                 else:
                     try:
-                        engine.board.push_xboard(arg)
+                        self.engine.board.push_xboard(arg)
                     except ValueError:
                         LOGGER.exception("Exception playing unexpected move")
 
-            def _hint(self, engine: XBoardProtocol, arg: str) -> None:
+            def _hint(self, arg: str) -> None:
                 if not self.result.done() and self.play_result.move is not None and self.play_result.ponder is None:
                     try:
-                        self.play_result.ponder = engine.board.parse_xboard(arg)
+                        self.play_result.ponder = self.engine.board.parse_xboard(arg)
                     except ValueError:
                         LOGGER.exception("Exception parsing hint")
                 else:
                     LOGGER.warning("Unexpected hint: %r", arg)
 
-            def _ping_after_move(self, engine: XBoardProtocol) -> None:
+            def _ping_after_move(self) -> None:
                 if self.pong_after_move is None:
                     n = id(self) & 0xffff
                     self.pong_after_move = f"pong {n}"
-                    engine._ping(n)
+                    self.engine._ping(n)
 
-            def cancel(self, engine: XBoardProtocol) -> None:
+            @typing.override
+            def cancel(self) -> None:
                 if self.stopped:
                     return
                 self.stopped = True
 
                 if self.result.cancelled():
-                    engine.send_line("?")
+                    self.engine.send_line("?")
 
                 if ponder:
-                    engine.send_line("easy")
+                    self.engine.send_line("easy")
 
                     n = (id(self) + 1) & 0xffff
                     self.pong_after_ponder = f"pong {n}"
-                    engine._ping(n)
+                    self.engine._ping(n)
 
-            def engine_terminated(self, engine: XBoardProtocol, exc: Exception) -> None:
+            @typing.override
+            def engine_terminated(self, exc: Exception) -> None:
                 # Allow terminating engine while pondering.
                 if not self.result.done():
-                    super().engine_terminated(engine, exc)
+                    super().engine_terminated(exc)
 
         return await self.communicate(XBoardPlayCommand)
 
@@ -2276,49 +2332,55 @@ async def analysis(self, board: chess.Board, limit: Optional[Limit] = None, *, m
         if limit is not None and (limit.white_clock is not None or limit.black_clock is not None):
             raise EngineError("xboard analysis does not support clock limits")
 
-        class XBoardAnalysisCommand(BaseCommand[XBoardProtocol, AnalysisResult]):
-            def start(self, engine: XBoardProtocol) -> None:
+        class XBoardAnalysisCommand(BaseCommand[AnalysisResult]):
+            def __init__(self, engine: XBoardProtocol):
+                super().__init__(engine)
+                self.engine = engine
+
+            @typing.override
+            def start(self) -> None:
                 self.stopped = False
                 self.best_move: Optional[chess.Move] = None
-                self.analysis = AnalysisResult(stop=lambda: self.cancel(engine))
+                self.analysis = AnalysisResult(stop=lambda: self.cancel())
                 self.final_pong: Optional[str] = None
 
-                engine._new(board, game, options)
+                self.engine._new(board, game, options)
 
                 if root_moves is not None:
-                    if not engine.features.get("exclude", 0):
+                    if not self.engine.features.get("exclude", 0):
                         raise EngineError("xboard engine does not support root_moves (feature exclude=0)")
 
-                    engine.send_line("exclude all")
+                    self.engine.send_line("exclude all")
                     for move in root_moves:
-                        engine.send_line(f"include {engine.board.xboard(move)}")
+                        self.engine.send_line(f"include {self.engine.board.xboard(move)}")
 
-                engine.send_line("post")
-                engine.send_line("analyze")
+                self.engine.send_line("post")
+                self.engine.send_line("analyze")
 
                 self.result.set_result(self.analysis)
 
                 if limit is not None and limit.time is not None:
-                    self.time_limit_handle: Optional[asyncio.Handle] = engine.loop.call_later(limit.time, lambda: self.cancel(engine))
+                    self.time_limit_handle: Optional[asyncio.Handle] = self.engine.loop.call_later(limit.time, lambda: self.cancel())
                 else:
                     self.time_limit_handle = None
 
-            def line_received(self, engine: XBoardProtocol, line: str) -> None:
+            @typing.override
+            def line_received(self, line: str) -> None:
                 token, remaining = _next_token(line)
                 if token.startswith("#"):
                     pass
                 elif len(line.split()) >= 4 and line.lstrip()[0].isdigit():
-                    self._post(engine, line)
+                    self._post(line)
                 elif f"{token} {remaining.strip()}" == self.final_pong:
-                    self.end(engine)
+                    self.end()
                 elif XBOARD_ERROR_REGEX.match(line):
-                    engine.first_game = True  # Board state might no longer be in sync
+                    self.engine.first_game = True  # Board state might no longer be in sync
                     raise EngineError(line)
                 else:
-                    LOGGER.warning("%s: Unexpected engine output: %r", engine, line)
+                    LOGGER.warning("%s: Unexpected engine output: %r", self.engine, line)
 
-            def _post(self, engine: XBoardProtocol, line: str) -> None:
-                post_info = _parse_xboard_post(line, engine.board, info)
+            def _post(self, line: str) -> None:
+                post_info = _parse_xboard_post(line, self.engine.board, info)
                 self.analysis.post(post_info)
 
                 pv = post_info.get("pv")
@@ -2327,36 +2389,38 @@ def _post(self, engine: XBoardProtocol, line: str) -> None:
 
                 if limit is not None:
                     if limit.time is not None and post_info.get("time", 0) >= limit.time:
-                        self.cancel(engine)
+                        self.cancel()
                     elif limit.nodes is not None and post_info.get("nodes", 0) >= limit.nodes:
-                        self.cancel(engine)
+                        self.cancel()
                     elif limit.depth is not None and post_info.get("depth", 0) >= limit.depth:
-                        self.cancel(engine)
+                        self.cancel()
                     elif limit.mate is not None and "score" in post_info:
                         if post_info["score"].relative >= Mate(limit.mate):
-                            self.cancel(engine)
+                            self.cancel()
 
-            def end(self, engine: XBoardProtocol) -> None:
+            def end(self) -> None:
                 if self.time_limit_handle:
                     self.time_limit_handle.cancel()
 
                 self.set_finished()
                 self.analysis.set_finished(BestMove(self.best_move, None))
 
-            def cancel(self, engine: XBoardProtocol) -> None:
+            @typing.override
+            def cancel(self) -> None:
                 if self.stopped:
                     return
                 self.stopped = True
 
-                engine.send_line(".")
-                engine.send_line("exit")
+                self.engine.send_line(".")
+                self.engine.send_line("exit")
 
                 n = id(self) & 0xffff
                 self.final_pong = f"pong {n}"
-                engine._ping(n)
+                self.engine._ping(n)
 
-            def engine_terminated(self, engine: XBoardProtocol, exc: Exception) -> None:
-                LOGGER.debug("%s: Closing analysis because engine has been terminated (error: %s)", engine, exc)
+            @typing.override
+            def engine_terminated(self, exc: Exception) -> None:
+                LOGGER.debug("%s: Closing analysis because engine has been terminated (error: %s)", self.engine, exc)
 
                 if self.time_limit_handle:
                     self.time_limit_handle.cancel()
@@ -2397,10 +2461,15 @@ def _configure(self, options: ConfigMapping) -> None:
             self._setoption(name, value)
 
     async def configure(self, options: ConfigMapping) -> None:
-        class XBoardConfigureCommand(BaseCommand[XBoardProtocol, None]):
-            def start(self, engine: XBoardProtocol) -> None:
-                engine._configure(options)
-                engine.target_config.update({name: value for name, value in options.items() if value is not None})
+        class XBoardConfigureCommand(BaseCommand[None]):
+            def __init__(self, engine: XBoardProtocol):
+                super().__init__(engine)
+                self.engine = engine
+
+            @typing.override
+            def start(self) -> None:
+                self.engine._configure(options)
+                self.engine.target_config.update({name: value for name, value in options.items() if value is not None})
                 self.result.set_result(None)
                 self.set_finished()
 
@@ -2423,12 +2492,17 @@ async def send_opponent_information(self, *, opponent: Optional[Opponent] = None
         return await self.configure(self._opponent_configuration(opponent=opponent, engine_rating=engine_rating))
 
     async def send_game_result(self, board: chess.Board, winner: Optional[Color] = None, game_ending: Optional[str] = None, game_complete: bool = True) -> None:
-        class XBoardGameResultCommand(BaseCommand[XBoardProtocol, None]):
-            def start(self, engine: XBoardProtocol) -> None:
+        class XBoardGameResultCommand(BaseCommand[None]):
+            def __init__(self, engine: XBoardProtocol):
+                super().__init__(engine)
+                self.engine = engine
+
+            @typing.override
+            def start(self) -> None:
                 if game_ending and any(c in game_ending for c in "{}\n\r"):
                     raise EngineError(f"invalid line break or curly braces in game ending message: {game_ending!r}")
 
-                engine._new(board, engine.game, {})  # Send final moves to engine.
+                self.engine._new(board, self.engine.game, {})  # Send final moves to engine.
 
                 outcome = board.outcome(claim_draw=True)
 
@@ -2451,7 +2525,7 @@ def start(self, engine: XBoardProtocol) -> None:
                     ending = ""
 
                 ending_text = f"{{{ending}}}" if ending else ""
-                engine.send_line(f"result {result} {ending_text}".strip())
+                self.engine.send_line(f"result {result} {ending_text}".strip())
                 self.result.set_result(None)
                 self.set_finished()
 
@@ -2845,7 +2919,7 @@ def id(self) -> Mapping[str, str]:
             future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)
         return future.result()
 
-    def communicate(self, command_factory: Callable[[Protocol], BaseCommand[Protocol, T]]) -> T:
+    def communicate(self, command_factory: Callable[[Protocol], BaseCommand[T]]) -> T:
         with self._not_shut_down():
             coro = self.protocol.communicate(command_factory)
             future = asyncio.run_coroutine_threadsafe(coro, self.protocol.loop)

From 5d8e82da82156f5eae2d15f07e2c24d800c87a41 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 31 Jul 2024 16:05:29 +0200
Subject: [PATCH 544/613] Let variant boards manage their own stack

---
 chess/__init__.py |  9 +++----
 chess/variant.py  | 66 +++++++++++++++++++++++++++++++++++------------
 2 files changed, 53 insertions(+), 22 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index a90df9ef6..b82f8559f 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -1542,7 +1542,7 @@ def from_chess960_pos(cls: Type[BaseBoardT], scharnagl: int) -> BaseBoardT:
 
 BoardT = TypeVar("BoardT", bound="Board")
 
-class _BoardState(Generic[BoardT]):
+class _BoardState:
 
     def __init__(self, board: BoardT) -> None:
         self.pawns = board.pawns
@@ -1701,7 +1701,7 @@ def __init__(self: BoardT, fen: Optional[str] = STARTING_FEN, *, chess960: bool
 
         self.ep_square = None
         self.move_stack = []
-        self._stack: List[_BoardState[BoardT]] = []
+        self._stack: List[_BoardState] = []
 
         if fen is None:
             self.clear()
@@ -2304,9 +2304,6 @@ def is_repetition(self, count: int = 3) -> bool:
 
         return False
 
-    def _board_state(self: BoardT) -> _BoardState[BoardT]:
-        return _BoardState(self)
-
     def _push_capture(self, move: Move, capture_square: Square, piece_type: PieceType, was_promoted: bool) -> None:
         pass
 
@@ -2335,7 +2332,7 @@ def push(self: BoardT, move: Move) -> None:
         """
         # Push move and remember board state.
         move = self._to_chess960(move)
-        board_state = self._board_state()
+        board_state = _BoardState(self)
         self.castling_rights = self.clean_castling_rights()  # Before pushing stack
         self.move_stack.append(self._from_chess960(self.chess960, move.from_square, move.to_square, move.promotion, move.drop))
         self._stack.append(board_state)
diff --git a/chess/variant.py b/chess/variant.py
index 6160696a2..119a0402c 100644
--- a/chess/variant.py
+++ b/chess/variant.py
@@ -673,14 +673,12 @@ def status(self) -> chess.Status:
 
 ThreeCheckBoardT = TypeVar("ThreeCheckBoardT", bound="ThreeCheckBoard")
 
-class _ThreeCheckBoardState(Generic[ThreeCheckBoardT], chess._BoardState[ThreeCheckBoardT]):
-    def __init__(self, board: ThreeCheckBoardT) -> None:
-        super().__init__(board)
+class _ThreeCheckBoardState:
+    def __init__(self, board: ThreeCheckBoard) -> None:
         self.remaining_checks_w = board.remaining_checks[chess.WHITE]
         self.remaining_checks_b = board.remaining_checks[chess.BLACK]
 
-    def restore(self, board: ThreeCheckBoardT) -> None:
-        super().restore(board)
+    def restore(self, board: ThreeCheckBoard) -> None:
         board.remaining_checks[chess.WHITE] = self.remaining_checks_w
         board.remaining_checks[chess.BLACK] = self.remaining_checks_b
 
@@ -698,8 +696,13 @@ class ThreeCheckBoard(chess.Board):
 
     def __init__(self, fen: Optional[str] = starting_fen, chess960: bool = False) -> None:
         self.remaining_checks = [3, 3]
+        self._three_check_stack: List[_ThreeCheckBoardState] = []
         super().__init__(fen, chess960=chess960)
 
+    def clear_stack(self) -> None:
+        super().clear_stack()
+        self._three_check_stack.clear()
+
     def reset_board(self) -> None:
         super().reset_board()
         self.remaining_checks[chess.WHITE] = 3
@@ -710,14 +713,17 @@ def clear_board(self) -> None:
         self.remaining_checks[chess.WHITE] = 3
         self.remaining_checks[chess.BLACK] = 3
 
-    def _board_state(self: ThreeCheckBoardT) -> _ThreeCheckBoardState[ThreeCheckBoardT]:
-        return _ThreeCheckBoardState(self)
-
     def push(self, move: chess.Move) -> None:
+        self._three_check_stack.append(_ThreeCheckBoardState(self))
         super().push(move)
         if self.is_check():
             self.remaining_checks[not self.turn] -= 1
 
+    def pop(self) -> chess.Move:
+        move = super().pop()
+        self._three_check_stack.pop().restore(self)
+        return move
+
     def has_insufficient_material(self, color: chess.Color) -> bool:
         # Any remaining piece can give check.
         return not (self.occupied_co[color] & ~self.kings)
@@ -792,8 +798,19 @@ def _transposition_key(self) -> Hashable:
     def copy(self: ThreeCheckBoardT, stack: Union[bool, int] = True) -> ThreeCheckBoardT:
         board = super().copy(stack=stack)
         board.remaining_checks = self.remaining_checks.copy()
+        if stack:
+            stack = len(self.move_stack) if stack is True else stack
+            board._three_check_stack = self._three_check_stack[-stack:]
         return board
 
+    def root(self: ThreeCheckBoardT) -> ThreeCheckBoardT:
+        if self._three_check_stack:
+            board = super().root()
+            self._three_check_stack[0].restore(board)
+            return board
+        else:
+            return self.copy(stack=False)
+
     def mirror(self: ThreeCheckBoardT) -> ThreeCheckBoardT:
         board = super().mirror()
         board.remaining_checks[chess.WHITE] = self.remaining_checks[chess.BLACK]
@@ -803,14 +820,12 @@ def mirror(self: ThreeCheckBoardT) -> ThreeCheckBoardT:
 
 CrazyhouseBoardT = TypeVar("CrazyhouseBoardT", bound="CrazyhouseBoard")
 
-class _CrazyhouseBoardState(Generic[CrazyhouseBoardT], chess._BoardState[CrazyhouseBoardT]):
-    def __init__(self, board: CrazyhouseBoardT) -> None:
-        super().__init__(board)
+class _CrazyhouseBoardState:
+    def __init__(self, board: CrazyhouseBoard) -> None:
         self.pockets_w = board.pockets[chess.WHITE].copy()
         self.pockets_b = board.pockets[chess.BLACK].copy()
 
-    def restore(self, board: CrazyhouseBoardT) -> None:
-        super().restore(board)
+    def restore(self, board: CrazyhouseBoard) -> None:
         board.pockets[chess.WHITE] = self.pockets_w
         board.pockets[chess.BLACK] = self.pockets_b
 
@@ -870,8 +885,13 @@ class CrazyhouseBoard(chess.Board):
 
     def __init__(self, fen: Optional[str] = starting_fen, chess960: bool = False) -> None:
         self.pockets = [CrazyhousePocket(), CrazyhousePocket()]
+        self._crazyhouse_stack: List[_CrazyhouseBoardState] = []
         super().__init__(fen, chess960=chess960)
 
+    def clear_stack(self) -> None:
+        super().clear_stack()
+        self._crazyhouse_stack.clear()
+
     def reset_board(self) -> None:
         super().reset_board()
         self.pockets[chess.WHITE].reset()
@@ -882,10 +902,8 @@ def clear_board(self) -> None:
         self.pockets[chess.WHITE].reset()
         self.pockets[chess.BLACK].reset()
 
-    def _board_state(self: CrazyhouseBoardT) -> _CrazyhouseBoardState[CrazyhouseBoardT]:
-        return _CrazyhouseBoardState(self)
-
     def push(self, move: chess.Move) -> None:
+        self._crazyhouse_stack.append(_CrazyhouseBoardState(self))
         super().push(move)
         if move.drop:
             self.pockets[not self.turn].remove(move.drop)
@@ -896,6 +914,11 @@ def _push_capture(self, move: chess.Move, capture_square: chess.Square, piece_ty
         else:
             self.pockets[self.turn].add(piece_type)
 
+    def pop(self) -> chess.Move:
+        move = super().pop()
+        self._crazyhouse_stack.pop().restore(self)
+        return move
+
     def _is_halfmoves(self, n: int) -> bool:
         # No draw by 50-move rule or 75-move rule.
         return False
@@ -1028,8 +1051,19 @@ def copy(self: CrazyhouseBoardT, stack: Union[bool, int] = True) -> CrazyhouseBo
         board = super().copy(stack=stack)
         board.pockets[chess.WHITE] = self.pockets[chess.WHITE].copy()
         board.pockets[chess.BLACK] = self.pockets[chess.BLACK].copy()
+        if stack:
+            stack = len(self.move_stack) if stack is True else stack
+            board._crazyhouse_stack = self._crazyhouse_stack[-stack:]
         return board
 
+    def root(self: CrazyhouseBoardT) -> CrazyhouseBoardT:
+        if self._crazyhouse_stack:
+            board = super().root()
+            self._crazyhouse_stack[0].restore(board)
+            return board
+        else:
+            return self.copy(stack=False)
+
     def mirror(self: CrazyhouseBoardT) -> CrazyhouseBoardT:
         board = super().mirror()
         board.pockets[chess.WHITE] = self.pockets[chess.BLACK].copy()

From a652aaad5d22edd4cc078dba9214fb1d81789d7a Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 31 Jul 2024 16:13:51 +0200
Subject: [PATCH 545/613] Add fallback for override decorator

---
 chess/engine.py | 60 ++++++++++++++++++++++++++++---------------------
 1 file changed, 34 insertions(+), 26 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index d1bbaaee1..f5fdff96a 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -24,6 +24,14 @@
 from types import TracebackType
 from typing import Any, Callable, Coroutine, Deque, Dict, Generator, Generic, Iterable, Iterator, List, Literal, Mapping, MutableMapping, Optional, Tuple, Type, TypedDict, TypeVar, Union
 
+try:
+    from typing import override
+except:
+    # Before Python 3.12
+    F = typing.TypeVar("F", bound=Callable[..., Any])
+    def override(fn: F, /) -> F:
+        return fn
+
 if typing.TYPE_CHECKING:
     from typing_extensions import Self
 
@@ -1317,16 +1325,16 @@ def __init__(self, engine: UciProtocol):
                 super().__init__(engine)
                 self.engine = engine
 
-            @typing.override
+            @override
             def check_initialized(self) -> None:
                 if self.engine.initialized:
                     raise EngineError("engine already initialized")
 
-            @typing.override
+            @override
             def start(self) -> None:
                 self.engine.send_line("uci")
 
-            @typing.override
+            @override
             def line_received(self, line: str) -> None:
                 token, remaining = _next_token(line)
                 if line.strip() == "uciok" and not self.result.done():
@@ -1415,7 +1423,7 @@ def __init__(self, engine: UciProtocol) -> None:
             def start(self) -> None:
                 self.engine._isready()
 
-            @typing.override
+            @override
             def line_received(self, line: str) -> None:
                 if line.strip() == "readyok":
                     self.result.set_result(None)
@@ -1574,7 +1582,7 @@ def __init__(self, engine: UciProtocol):
                 # MultiPV never change between pondering play commands.
                 engine.may_ponderhit = board if ponder and not engine.first_game and game == engine.game and not engine._changed_options(new_options) else None
 
-            @typing.override
+            @override
             def start(self) -> None:
                 self.info: InfoDict = {}
                 self.pondering: Optional[chess.Board] = None
@@ -1605,7 +1613,7 @@ def start(self) -> None:
                 else:
                     self._readyok()
 
-            @typing.override
+            @override
             def line_received(self, line: str) -> None:
                 token, remaining = _next_token(line)
                 if token == "info":
@@ -1662,7 +1670,7 @@ def end(self) -> None:
                 engine.may_ponderhit = None
                 self.set_finished()
 
-            @typing.override
+            @override
             def cancel(self) -> None:
                 if self.engine.may_ponderhit and self.pondering and self.engine.may_ponderhit.move_stack == self.pondering.move_stack and self.engine.may_ponderhit == self.pondering:
                     self.engine.ponderhit = True
@@ -1670,7 +1678,7 @@ def cancel(self) -> None:
                 else:
                     self.engine.send_line("stop")
 
-            @typing.override
+            @override
             def engine_terminated(self, exc: Exception) -> None:
                 # Allow terminating engine while pondering.
                 if not self.result.done():
@@ -1705,7 +1713,7 @@ def start(self) -> None:
                 else:
                     self._readyok()
 
-            @typing.override
+            @override
             def line_received(self, line: str) -> None:
                 token, remaining = _next_token(line)
                 if token == "info":
@@ -1738,11 +1746,11 @@ def _bestmove(self, arg: str) -> None:
                 self.set_finished()
                 self.analysis.set_finished(best)
 
-            @typing.override
+            @override
             def cancel(self) -> None:
                 self.engine.send_line("stop")
 
-            @typing.override
+            @override
             def engine_terminated(self, exc: Exception) -> None:
                 LOGGER.debug("%s: Closing analysis because engine has been terminated (error: %s)", self.engine, exc)
                 self.analysis.set_exception(exc)
@@ -1978,12 +1986,12 @@ def __init__(self, engine: XBoardProtocol):
                 super().__init__(engine)
                 self.engine = engine
 
-            @typing.override
+            @override
             def check_initialized(self) -> None:
                 if self.engine.initialized:
                     raise EngineError("engine already initialized")
 
-            @typing.override
+            @override
             def start(self) -> None:
                 self.engine.send_line("xboard")
                 self.engine.send_line("protover 2")
@@ -1993,7 +2001,7 @@ def timeout(self) -> None:
                 LOGGER.error("%s: Timeout during initialization", self.engine)
                 self.end()
 
-            @typing.override
+            @override
             def line_received(self, line: str) -> None:
                 token, remaining = _next_token(line)
                 if token.startswith("#"):
@@ -2152,13 +2160,13 @@ def __init__(self, engine: XBoardProtocol):
                 super().__init__(engine)
                 self.engine = engine
 
-            @typing.override
+            @override
             def start(self) -> None:
                 n = id(self) & 0xffff
                 self.pong = f"pong {n}"
                 self.engine._ping(n)
 
-            @typing.override
+            @override
             def line_received(self, line: str) -> None:
                 if line == self.pong:
                     self.result.set_result(None)
@@ -2179,7 +2187,7 @@ def __init__(self, engine: XBoardProtocol):
                 super().__init__(engine)
                 self.engine = engine
 
-            @typing.override
+            @override
             def start(self) -> None:
                 self.play_result = PlayResult(None, None)
                 self.stopped = False
@@ -2221,7 +2229,7 @@ def start(self) -> None:
                 self.engine.send_line("hard" if ponder else "easy")
                 self.engine.send_line("go")
 
-            @typing.override
+            @override
             def line_received(self, line: str) -> None:
                 token, remaining = _next_token(line)
                 if token == "move":
@@ -2301,7 +2309,7 @@ def _ping_after_move(self) -> None:
                     self.pong_after_move = f"pong {n}"
                     self.engine._ping(n)
 
-            @typing.override
+            @override
             def cancel(self) -> None:
                 if self.stopped:
                     return
@@ -2317,7 +2325,7 @@ def cancel(self) -> None:
                     self.pong_after_ponder = f"pong {n}"
                     self.engine._ping(n)
 
-            @typing.override
+            @override
             def engine_terminated(self, exc: Exception) -> None:
                 # Allow terminating engine while pondering.
                 if not self.result.done():
@@ -2337,7 +2345,7 @@ def __init__(self, engine: XBoardProtocol):
                 super().__init__(engine)
                 self.engine = engine
 
-            @typing.override
+            @override
             def start(self) -> None:
                 self.stopped = False
                 self.best_move: Optional[chess.Move] = None
@@ -2364,7 +2372,7 @@ def start(self) -> None:
                 else:
                     self.time_limit_handle = None
 
-            @typing.override
+            @override
             def line_received(self, line: str) -> None:
                 token, remaining = _next_token(line)
                 if token.startswith("#"):
@@ -2405,7 +2413,7 @@ def end(self) -> None:
                 self.set_finished()
                 self.analysis.set_finished(BestMove(self.best_move, None))
 
-            @typing.override
+            @override
             def cancel(self) -> None:
                 if self.stopped:
                     return
@@ -2418,7 +2426,7 @@ def cancel(self) -> None:
                 self.final_pong = f"pong {n}"
                 self.engine._ping(n)
 
-            @typing.override
+            @override
             def engine_terminated(self, exc: Exception) -> None:
                 LOGGER.debug("%s: Closing analysis because engine has been terminated (error: %s)", self.engine, exc)
 
@@ -2466,7 +2474,7 @@ def __init__(self, engine: XBoardProtocol):
                 super().__init__(engine)
                 self.engine = engine
 
-            @typing.override
+            @override
             def start(self) -> None:
                 self.engine._configure(options)
                 self.engine.target_config.update({name: value for name, value in options.items() if value is not None})
@@ -2497,7 +2505,7 @@ def __init__(self, engine: XBoardProtocol):
                 super().__init__(engine)
                 self.engine = engine
 
-            @typing.override
+            @override
             def start(self) -> None:
                 if game_ending and any(c in game_ending for c in "{}\n\r"):
                     raise EngineError(f"invalid line break or curly braces in game ending message: {game_ending!r}")

From 7a59a3683f33682c0c2c9b359469c8b9876ece9e Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 31 Jul 2024 17:02:12 +0200
Subject: [PATCH 546/613] Import override from typing_extensions

---
 chess/engine.py | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index f5fdff96a..347acf297 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -24,10 +24,9 @@
 from types import TracebackType
 from typing import Any, Callable, Coroutine, Deque, Dict, Generator, Generic, Iterable, Iterator, List, Literal, Mapping, MutableMapping, Optional, Tuple, Type, TypedDict, TypeVar, Union
 
-try:
-    from typing import override
-except:
-    # Before Python 3.12
+if typing.TYPE_CHECKING:
+    from typing_extensions import override
+else:
     F = typing.TypeVar("F", bound=Callable[..., Any])
     def override(fn: F, /) -> F:
         return fn

From 571658baa358b97f3cb5104c3dfab33c6d962deb Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 31 Jul 2024 17:25:03 +0200
Subject: [PATCH 547/613] Use typing_extensions.Self

---
 chess/__init__.py | 32 ++++++++++++++++----------------
 chess/engine.py   |  2 +-
 chess/pgn.py      |  7 +++++--
 chess/syzygy.py   |  7 ++++---
 chess/variant.py  | 18 +++++++++++-------
 5 files changed, 37 insertions(+), 29 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index b82f8559f..3553eee65 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -25,7 +25,7 @@
 from typing import ClassVar, Callable, Counter, Dict, Generic, Hashable, Iterable, Iterator, List, Literal, Mapping, Optional, SupportsInt, Tuple, Type, TypeVar, Union
 
 if typing.TYPE_CHECKING:
-    from typing_extensions import TypeAlias
+    from typing_extensions import Self, TypeAlias
 
 
 EnPassantSpec = Literal["legal", "fen", "xfen"]
@@ -1455,7 +1455,7 @@ def apply_transform(self, f: Callable[[Bitboard], Bitboard]) -> None:
         self.occupied = f(self.occupied)
         self.promoted = f(self.promoted)
 
-    def transform(self: BaseBoardT, f: Callable[[Bitboard], Bitboard]) -> BaseBoardT:
+    def transform(self, f: Callable[[Bitboard], Bitboard]) -> Self:
         """
         Returns a transformed copy of the board (without move stack)
         by applying a bitboard transformation function.
@@ -1473,11 +1473,11 @@ def transform(self: BaseBoardT, f: Callable[[Bitboard], Bitboard]) -> BaseBoardT
         board.apply_transform(f)
         return board
 
-    def apply_mirror(self: BaseBoardT) -> None:
+    def apply_mirror(self) -> None:
         self.apply_transform(flip_vertical)
         self.occupied_co[WHITE], self.occupied_co[BLACK] = self.occupied_co[BLACK], self.occupied_co[WHITE]
 
-    def mirror(self: BaseBoardT) -> BaseBoardT:
+    def mirror(self) -> Self:
         """
         Returns a mirrored copy of the board (without move stack).
 
@@ -1491,7 +1491,7 @@ def mirror(self: BaseBoardT) -> BaseBoardT:
         board.apply_mirror()
         return board
 
-    def copy(self: BaseBoardT) -> BaseBoardT:
+    def copy(self) -> Self:
         """Creates a copy of the board."""
         board = type(self)(None)
 
@@ -1509,10 +1509,10 @@ def copy(self: BaseBoardT) -> BaseBoardT:
 
         return board
 
-    def __copy__(self: BaseBoardT) -> BaseBoardT:
+    def __copy__(self) -> Self:
         return self.copy()
 
-    def __deepcopy__(self: BaseBoardT, memo: Dict[int, object]) -> BaseBoardT:
+    def __deepcopy__(self, memo: Dict[int, object]) -> Self:
         board = self.copy()
         memo[id(self)] = board
         return board
@@ -1694,7 +1694,7 @@ class Board(BaseBoard):
     manipulation.
     """
 
-    def __init__(self: BoardT, fen: Optional[str] = STARTING_FEN, *, chess960: bool = False) -> None:
+    def __init__(self, fen: Optional[str] = STARTING_FEN, *, chess960: bool = False) -> None:
         BaseBoard.__init__(self, None)
 
         self.chess960 = chess960
@@ -1786,7 +1786,7 @@ def clear_stack(self) -> None:
         self.move_stack.clear()
         self._stack.clear()
 
-    def root(self: BoardT) -> BoardT:
+    def root(self) -> Self:
         """Returns a copy of the root position."""
         if self._stack:
             board = type(self)(None, chess960=self.chess960)
@@ -2307,7 +2307,7 @@ def is_repetition(self, count: int = 3) -> bool:
     def _push_capture(self, move: Move, capture_square: Square, piece_type: PieceType, was_promoted: bool) -> None:
         pass
 
-    def push(self: BoardT, move: Move) -> None:
+    def push(self, move: Move) -> None:
         """
         Updates the position with the given *move* and puts it onto the
         move stack.
@@ -2428,7 +2428,7 @@ def push(self: BoardT, move: Move) -> None:
         # Swap turn.
         self.turn = not self.turn
 
-    def pop(self: BoardT) -> Move:
+    def pop(self) -> Move:
         """
         Restores the previous position and returns the last move from the stack.
 
@@ -2838,7 +2838,7 @@ def _validate_epd_opcode(self, opcode: str) -> None:
             if blacklisted in opcode:
                 raise ValueError(f"invalid character {blacklisted!r} in epd opcode: {opcode!r}")
 
-    def _parse_epd_ops(self: BoardT, operation_part: str, make_board: Callable[[], BoardT]) -> Dict[str, Union[None, str, int, float, Move, List[Move]]]:
+    def _parse_epd_ops(self, operation_part: str, make_board: Callable[[], Self]) -> Dict[str, Union[None, str, int, float, Move, List[Move]]]:
         operations: Dict[str, Union[None, str, int, float, Move, List[Move]]] = {}
         state = "opcode"
         opcode = ""
@@ -3831,16 +3831,16 @@ def apply_transform(self, f: Callable[[Bitboard], Bitboard]) -> None:
         self.ep_square = None if self.ep_square is None else msb(f(BB_SQUARES[self.ep_square]))
         self.castling_rights = f(self.castling_rights)
 
-    def transform(self: BoardT, f: Callable[[Bitboard], Bitboard]) -> BoardT:
+    def transform(self, f: Callable[[Bitboard], Bitboard]) -> Self:
         board = self.copy(stack=False)
         board.apply_transform(f)
         return board
 
-    def apply_mirror(self: BoardT) -> None:
+    def apply_mirror(self) -> None:
         super().apply_mirror()
         self.turn = not self.turn
 
-    def mirror(self: BoardT) -> BoardT:
+    def mirror(self) -> Self:
         """
         Returns a mirrored copy of the board.
 
@@ -3855,7 +3855,7 @@ def mirror(self: BoardT) -> BoardT:
         board.apply_mirror()
         return board
 
-    def copy(self: BoardT, *, stack: Union[bool, int] = True) -> BoardT:
+    def copy(self, *, stack: Union[bool, int] = True) -> Self:
         """
         Creates a copy of the board.
 
diff --git a/chess/engine.py b/chess/engine.py
index 347acf297..59b843b8b 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -970,7 +970,7 @@ def pipe_data_received(self, fd: int, data: Union[bytes, str]) -> None:
     def error_line_received(self, line: str) -> None:
         LOGGER.warning("%s: stderr >> %s", self, line)
 
-    def _line_received(self: Protocol, line: str) -> None:
+    def _line_received(self, line: str) -> None:
         LOGGER.debug("%s: >> %s", self, line)
 
         self.line_received(line)
diff --git a/chess/pgn.py b/chess/pgn.py
index 0d0879ae0..83ddaf8f5 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -15,6 +15,9 @@
 from typing import Any, Callable, Dict, Generic, Iterable, Iterator, List, Literal, Mapping, MutableMapping, Set, TextIO, Tuple, Type, TypeVar, Optional, Union
 from chess import Color, Square
 
+if typing.TYPE_CHECKING:
+    from typing_extensions import Self
+
 
 LOGGER = logging.getLogger(__name__)
 
@@ -1014,10 +1017,10 @@ def __iter__(self) -> Iterator[str]:
     def __len__(self) -> int:
         return len(self._tag_roster) + len(self._others)
 
-    def copy(self: HeadersT) -> HeadersT:
+    def copy(self) -> Self:
         return type(self)(self)
 
-    def __copy__(self: HeadersT) -> HeadersT:
+    def __copy__(self) -> Self:
         return self.copy()
 
     def __repr__(self) -> str:
diff --git a/chess/syzygy.py b/chess/syzygy.py
index 8ba1cbca4..77a6eeded 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -14,6 +14,9 @@
 from types import TracebackType
 from typing import Deque, Dict, Iterable, Iterator, List, Optional, Set, Tuple, Type, TypeVar, Union
 
+if typing.TYPE_CHECKING:
+    from typing_extensions import Self
+
 
 UINT64_BE = struct.Struct(">Q")
 UINT32 = struct.Struct(" None:
                     self.data.close()
                     self.data = None
 
-    def __enter__(self: TableT) -> TableT:
+    def __enter__(self) -> Self:
         return self
 
     def __exit__(self, exc_type: Optional[Type[BaseException]], exc_value: Optional[BaseException], traceback: Optional[TracebackType]) -> None:
diff --git a/chess/variant.py b/chess/variant.py
index 119a0402c..d28a6e964 100644
--- a/chess/variant.py
+++ b/chess/variant.py
@@ -2,9 +2,13 @@
 
 import chess
 import itertools
+import typing
 
 from typing import Dict, Generic, Hashable, Iterable, Iterator, List, Optional, Type, TypeVar, Union
 
+if typing.TYPE_CHECKING:
+    from typing_extensions import Self
+
 
 class SuicideBoard(chess.Board):
 
@@ -795,7 +799,7 @@ def _transposition_key(self) -> Hashable:
         return (super()._transposition_key(),
                 self.remaining_checks[chess.WHITE], self.remaining_checks[chess.BLACK])
 
-    def copy(self: ThreeCheckBoardT, stack: Union[bool, int] = True) -> ThreeCheckBoardT:
+    def copy(self, stack: Union[bool, int] = True) -> Self:
         board = super().copy(stack=stack)
         board.remaining_checks = self.remaining_checks.copy()
         if stack:
@@ -803,7 +807,7 @@ def copy(self: ThreeCheckBoardT, stack: Union[bool, int] = True) -> ThreeCheckBo
             board._three_check_stack = self._three_check_stack[-stack:]
         return board
 
-    def root(self: ThreeCheckBoardT) -> ThreeCheckBoardT:
+    def root(self) -> Self:
         if self._three_check_stack:
             board = super().root()
             self._three_check_stack[0].restore(board)
@@ -811,7 +815,7 @@ def root(self: ThreeCheckBoardT) -> ThreeCheckBoardT:
         else:
             return self.copy(stack=False)
 
-    def mirror(self: ThreeCheckBoardT) -> ThreeCheckBoardT:
+    def mirror(self) -> Self:
         board = super().mirror()
         board.remaining_checks[chess.WHITE] = self.remaining_checks[chess.BLACK]
         board.remaining_checks[chess.BLACK] = self.remaining_checks[chess.WHITE]
@@ -865,7 +869,7 @@ def __len__(self) -> int:
     def __repr__(self) -> str:
         return f"CrazyhousePocket('{self}')"
 
-    def copy(self: CrazyhousePocketT) -> CrazyhousePocketT:
+    def copy(self) -> Self:
         """Returns a copy of this pocket."""
         pocket = type(self)()
         pocket._pieces = self._pieces[:]
@@ -1047,7 +1051,7 @@ def epd(self, shredder: bool = False, en_passant: chess.EnPassantSpec = "legal",
         board_part, info_part = epd.split(" ", 1)
         return f"{board_part}[{str(self.pockets[chess.WHITE]).upper()}{self.pockets[chess.BLACK]}] {info_part}"
 
-    def copy(self: CrazyhouseBoardT, stack: Union[bool, int] = True) -> CrazyhouseBoardT:
+    def copy(self, stack: Union[bool, int] = True) -> Self:
         board = super().copy(stack=stack)
         board.pockets[chess.WHITE] = self.pockets[chess.WHITE].copy()
         board.pockets[chess.BLACK] = self.pockets[chess.BLACK].copy()
@@ -1056,7 +1060,7 @@ def copy(self: CrazyhouseBoardT, stack: Union[bool, int] = True) -> CrazyhouseBo
             board._crazyhouse_stack = self._crazyhouse_stack[-stack:]
         return board
 
-    def root(self: CrazyhouseBoardT) -> CrazyhouseBoardT:
+    def root(self) -> Self:
         if self._crazyhouse_stack:
             board = super().root()
             self._crazyhouse_stack[0].restore(board)
@@ -1064,7 +1068,7 @@ def root(self: CrazyhouseBoardT) -> CrazyhouseBoardT:
         else:
             return self.copy(stack=False)
 
-    def mirror(self: CrazyhouseBoardT) -> CrazyhouseBoardT:
+    def mirror(self) -> Self:
         board = super().mirror()
         board.pockets[chess.WHITE] = self.pockets[chess.BLACK].copy()
         board.pockets[chess.BLACK] = self.pockets[chess.WHITE].copy()

From f286d687e496123fb46d26ce3fd06bc0db505dc4 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 31 Jul 2024 17:40:10 +0200
Subject: [PATCH 548/613] Towards pyright compatibility

---
 chess/__init__.py | 4 ++--
 chess/engine.py   | 7 +++++--
 chess/variant.py  | 8 ++++----
 3 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 3553eee65..55bd4cad2 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -1544,7 +1544,7 @@ def from_chess960_pos(cls: Type[BaseBoardT], scharnagl: int) -> BaseBoardT:
 
 class _BoardState:
 
-    def __init__(self, board: BoardT) -> None:
+    def __init__(self, board: Board) -> None:
         self.pawns = board.pawns
         self.knights = board.knights
         self.bishops = board.bishops
@@ -1564,7 +1564,7 @@ def __init__(self, board: BoardT) -> None:
         self.halfmove_clock = board.halfmove_clock
         self.fullmove_number = board.fullmove_number
 
-    def restore(self, board: BoardT) -> None:
+    def restore(self, board: Board) -> None:
         board.pawns = self.pawns
         board.knights = self.knights
         board.bishops = self.bishops
diff --git a/chess/engine.py b/chess/engine.py
index 59b843b8b..9a6a21f48 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -406,8 +406,10 @@ class Score(abc.ABC):
     """
 
     @typing.overload
+    @abc.abstractmethod
     def score(self, *, mate_score: int) -> int: ...
     @typing.overload
+    @abc.abstractmethod
     def score(self, *, mate_score: Optional[int] = None) -> Optional[int]: ...
     @abc.abstractmethod
     def score(self, *, mate_score: Optional[int] = None) -> Optional[int]:
@@ -2120,12 +2122,13 @@ def _new(self, board: chess.Board, game: object, options: ConfigMapping, opponen
             if self.config.get("computer"):
                 self.send_line("computer")
 
-        self.send_line("force")
+            self.send_line("force")
 
-        if new_game:
             fen = root.fen(shredder=board.chess960, en_passant="fen")
             if variant != "normal" or fen != chess.STARTING_FEN or board.chess960:
                 self.send_line(f"setboard {fen}")
+        else:
+            self.send_line("force")
 
         # Undo moves until common position.
         common_stack_len = 0
diff --git a/chess/variant.py b/chess/variant.py
index d28a6e964..6e9161dc8 100644
--- a/chess/variant.py
+++ b/chess/variant.py
@@ -133,7 +133,7 @@ def _transposition_key(self) -> Hashable:
         else:
             return super()._transposition_key()
 
-    def board_fen(self, promoted: Optional[bool] = None) -> str:
+    def board_fen(self, *, promoted: Optional[bool] = None) -> str:
         if promoted is None:
             promoted = self.has_chess960_castling_rights()
         return super().board_fen(promoted=promoted)
@@ -799,7 +799,7 @@ def _transposition_key(self) -> Hashable:
         return (super()._transposition_key(),
                 self.remaining_checks[chess.WHITE], self.remaining_checks[chess.BLACK])
 
-    def copy(self, stack: Union[bool, int] = True) -> Self:
+    def copy(self, *, stack: Union[bool, int] = True) -> Self:
         board = super().copy(stack=stack)
         board.remaining_checks = self.remaining_checks.copy()
         if stack:
@@ -1041,7 +1041,7 @@ def set_fen(self, fen: str) -> None:
         self.pockets[chess.WHITE] = white_pocket
         self.pockets[chess.BLACK] = black_pocket
 
-    def board_fen(self, promoted: Optional[bool] = None) -> str:
+    def board_fen(self, *, promoted: Optional[bool] = None) -> str:
         if promoted is None:
             promoted = True
         return super().board_fen(promoted=promoted)
@@ -1051,7 +1051,7 @@ def epd(self, shredder: bool = False, en_passant: chess.EnPassantSpec = "legal",
         board_part, info_part = epd.split(" ", 1)
         return f"{board_part}[{str(self.pockets[chess.WHITE]).upper()}{self.pockets[chess.BLACK]}] {info_part}"
 
-    def copy(self, stack: Union[bool, int] = True) -> Self:
+    def copy(self, *, stack: Union[bool, int] = True) -> Self:
         board = super().copy(stack=stack)
         board.pockets[chess.WHITE] = self.pockets[chess.WHITE].copy()
         board.pockets[chess.BLACK] = self.pockets[chess.BLACK].copy()

From 33eea7ca062ed7396590ac3408ec05121bba9483 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 31 Jul 2024 18:01:47 +0200
Subject: [PATCH 549/613] Add changelog entries

---
 CHANGELOG.rst | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index a4534badb..754b5d418 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -15,6 +15,13 @@ Changes:
   some 8 piece positions with decisive captures can be probed successfully.
 * The string wrapper returned by ``chess.svg`` functions now also implements
   ``_repr_html_``.
+* Significant changes to ``chess.engine`` internals:
+  ``chess.engine.BaseCommand`` methods other than the constructor no longer
+  receive ``engine: Protocol``.
+* Significant changes to board state internals: Subclasses of ``chess.Board``
+  can no longer hook into board state recording/restoration and need to
+  override relevant methods instead (``clear_stack``, ``copy``, ``root``,
+  ``push``, ``pop``).
 
 New features:
 

From caefd4dc6c25369750f6cc461885adfbbd52f09c Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 31 Jul 2024 21:11:38 +0200
Subject: [PATCH 550/613] chess.engine._next_token() cosmetics

---
 chess/engine.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 9a6a21f48..c6698bc76 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -2650,7 +2650,8 @@ def _parse_xboard_post(line: str, root_board: chess.Board, selector: Info = INFO
 
 
 def _next_token(line: str) -> tuple[str, str]:
-    """Get the next token in a whitespace-delimited line of text.
+    """
+    Get the next token in a whitespace-delimited line of text.
 
     The result is returned as a 2-part tuple of strings.
 
@@ -2660,10 +2661,10 @@ def _next_token(line: str) -> tuple[str, str]:
     If the input line is not empty and not completely whitespace, then
     the first element of the returned tuple is a single word with
     leading and trailing whitespace removed. The second element is the
-    unchanged rest of the line."""
-
+    unchanged rest of the line.
+    """
     parts = line.split(maxsplit=1)
-    return (parts[0] if parts else "", parts[1] if len(parts) == 2 else "")
+    return parts[0] if parts else "", parts[1] if len(parts) == 2 else ""
 
 
 class BestMove:

From 71e7c31fba31554a2b174ff7fb88a77b61674543 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 31 Jul 2024 22:21:28 +0200
Subject: [PATCH 551/613] Show actual state in engine command state assertions
 (#1049, #1071)

---
 chess/engine.py | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index c6698bc76..302aa2bbd 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -989,7 +989,7 @@ async def communicate(self, command_factory: Callable[[Self], BaseCommand[T]]) -
         if self.returncode.done():
             raise EngineTerminatedError(f"engine process dead (exit code: {self.returncode.result()})")
 
-        assert command.state == CommandState.NEW
+        assert command.state == CommandState.NEW, command.state
 
         if self.next_command is not None:
             self.next_command.result.cancel()
@@ -1253,7 +1253,7 @@ def _handle_exception(self, exc: Exception) -> None:
             self.finished.set_result(None)
 
     def set_finished(self) -> None:
-        assert self.state in [CommandState.ACTIVE, CommandState.CANCELLING]
+        assert self.state in [CommandState.ACTIVE, CommandState.CANCELLING], self.state
         if not self.result.done():
             self.result.set_exception(EngineError(f"engine command finished before returning result: {self!r}"))
         self.finished.set_result(None)
@@ -1261,12 +1261,12 @@ def set_finished(self) -> None:
 
     def _cancel(self) -> None:
         if self.state != CommandState.CANCELLING and self.state != CommandState.DONE:
-            assert self.state == CommandState.ACTIVE
+            assert self.state == CommandState.ACTIVE, self.state
             self.state = CommandState.CANCELLING
             self.cancel()
 
     def _start(self) -> None:
-        assert self.state == CommandState.NEW
+        assert self.state == CommandState.NEW, self.state
         self.state = CommandState.ACTIVE
         try:
             self.check_initialized()
@@ -1275,7 +1275,7 @@ def _start(self) -> None:
             self._handle_exception(err)
 
     def _line_received(self, line: str) -> None:
-        assert self.state in [CommandState.ACTIVE, CommandState.CANCELLING]
+        assert self.state in [CommandState.ACTIVE, CommandState.CANCELLING], self.state
         try:
             self.line_received(line)
         except EngineError as err:

From 7299216641f5bd0434c06111608892617aa39147 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 31 Jul 2024 22:37:53 +0200
Subject: [PATCH 552/613] Immediately dispatch line/termination/finish (fixes
 #1049, fixes #1071)

Avoids races between queued up lines and command finish callbacks.
---
 CHANGELOG.rst   |  2 ++
 chess/engine.py | 40 +++++++++++++++++++++++++++-------------
 test.py         | 18 ++++++++++++++++++
 3 files changed, 47 insertions(+), 13 deletions(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 754b5d418..9a0a16e6c 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -30,6 +30,8 @@ New features:
 
 Bugfixes:
 
+* Fix unsolicited engine output may cause assertion errors with regard to
+  command states.
 * Fix handling of whitespace in UCI engine communication.
 * For ``chess.Board.epd()`` and ``chess.Board.set_epd()``, require that EPD
   opcodes start with a letter.
diff --git a/chess/engine.py b/chess/engine.py
index 302aa2bbd..ccd6894d2 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -883,7 +883,7 @@ def write(self, data: bytes) -> None:
                 expectation, responses = self.expectations.popleft()
                 assert expectation == line, f"expected {expectation}, got: {line}"
                 if responses:
-                    self.protocol.pipe_data_received(1, "\n".join(responses + [""]).encode("utf-8"))
+                    self.protocol.loop.call_soon(self.protocol.pipe_data_received, 1, "\n".join(responses + [""]).encode("utf-8"))
 
     def get_pid(self) -> int:
         return id(self)
@@ -934,12 +934,12 @@ def connection_lost(self, exc: Optional[Exception]) -> None:
         LOGGER.debug("%s: Connection lost (exit code: %d, error: %s)", self, code, exc)
 
         # Terminate commands.
-        if self.command is not None:
-            self.command._engine_terminated(code)
-            self.command = None
-        if self.next_command is not None:
-            self.next_command._engine_terminated(code)
-            self.next_command = None
+        command, self.command = self.command, None
+        next_command, self.next_command = self.next_command, None
+        if command:
+            command._engine_terminated(code)
+        if next_command:
+            next_command._engine_terminated(code)
 
         self.returncode.set_result(code)
 
@@ -965,9 +965,9 @@ def pipe_data_received(self, fd: int, data: Union[bytes, str]) -> None:
                 LOGGER.warning("%s: >> %r (%s)", self, bytes(line_bytes), err)
             else:
                 if fd == 1:
-                    self.loop.call_soon(self._line_received, line)
+                    self._line_received(line)
                 else:
-                    self.loop.call_soon(self.error_line_received, line)
+                    self.error_line_received(line)
 
     def error_line_received(self, line: str) -> None:
         LOGGER.warning("%s: stderr >> %s", self, line)
@@ -998,7 +998,7 @@ async def communicate(self, command_factory: Callable[[Self], BaseCommand[T]]) -
 
         self.next_command = command
 
-        def previous_command_finished(_: Optional[asyncio.Future[None]]) -> None:
+        def previous_command_finished() -> None:
             self.command, self.next_command = self.next_command, None
             if self.command is not None:
                 cmd = self.command
@@ -1008,11 +1008,11 @@ def cancel_if_cancelled(result: asyncio.Future[T]) -> None:
                         cmd._cancel()
 
                 cmd.result.add_done_callback(cancel_if_cancelled)
-                cmd.finished.add_done_callback(previous_command_finished)
                 cmd._start()
+                cmd.add_finished_callback(previous_command_finished)
 
         if self.command is None:
-            previous_command_finished(None)
+            previous_command_finished()
         elif not self.command.result.done():
             self.command.result.cancel()
         elif not self.command.result.cancelled():
@@ -1228,6 +1228,17 @@ def __init__(self, engine: Protocol) -> None:
         self.result: asyncio.Future[T] = asyncio.Future()
         self.finished: asyncio.Future[None] = asyncio.Future()
 
+        self._finished_callbacks: List[Callable[[], None]] = []
+
+    def add_finished_callback(self, callback: Callable[[], None]) -> None:
+        self._finished_callbacks.append(callback)
+        self._dispatch_finished()
+
+    def _dispatch_finished(self) -> None:
+        if self.finished.done():
+            while self._finished_callbacks:
+                self._finished_callbacks.pop()()
+
     def _engine_terminated(self, code: int) -> None:
         hint = ", binary not compatible with cpu?" if code in [-4, 0xc000001d] else ""
         exc = EngineTerminatedError(f"engine process died unexpectedly (exit code: {code}{hint})")
@@ -1235,6 +1246,7 @@ def _engine_terminated(self, code: int) -> None:
             self.engine_terminated(exc)
         elif self.state == CommandState.CANCELLING:
             self.finished.set_result(None)
+            self._dispatch_finished()
         elif self.state == CommandState.NEW:
             self._handle_exception(exc)
 
@@ -1251,13 +1263,15 @@ def _handle_exception(self, exc: Exception) -> None:
 
         if not self.finished.done():
             self.finished.set_result(None)
+            self._dispatch_finished()
 
     def set_finished(self) -> None:
         assert self.state in [CommandState.ACTIVE, CommandState.CANCELLING], self.state
         if not self.result.done():
             self.result.set_exception(EngineError(f"engine command finished before returning result: {self!r}"))
-        self.finished.set_result(None)
         self.state = CommandState.DONE
+        self.finished.set_result(None)
+        self._dispatch_finished()
 
     def _cancel(self) -> None:
         if self.state != CommandState.CANCELLING and self.state != CommandState.DONE:
diff --git a/test.py b/test.py
index 00d766a03..438628b98 100755
--- a/test.py
+++ b/test.py
@@ -3527,6 +3527,24 @@ async def main():
 
         asyncio.run(main())
 
+    def test_uci_output_after_command(self):
+        async def main():
+            protocol = chess.engine.UciProtocol()
+            mock = chess.engine.MockTransport(protocol)
+
+            mock.expect("uci", [
+                "Arasan v24.0.0-10-g367aa9f Copyright 1994-2023 by Jon Dart.",
+                "All rights reserved.",
+                "id name Arasan v24.0.0-10-g367aa9f",
+                "uciok",
+                "info string out of do_all_pending, list size=0"
+            ])
+            await protocol.initialize()
+
+            mock.assert_done()
+
+        asyncio.run(main())
+
     def test_hiarcs_bestmove(self):
         async def main():
             protocol = chess.engine.UciProtocol()

From 7fa1f1825bc504ad50724e848b0e982b526c9f87 Mon Sep 17 00:00:00 2001
From: Lukas Malte Monnerjahn 
Date: Thu, 5 Sep 2024 11:31:03 +0200
Subject: [PATCH 553/613] SVG: Align pieces, check mark, selected squares and
 arrows correctly when rendering a border #1103

---
 chess/svg.py | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/chess/svg.py b/chess/svg.py
index 2948b0b80..c665b171b 100644
--- a/chess/svg.py
+++ b/chess/svg.py
@@ -283,6 +283,7 @@ def board(board: Optional[chess.BaseBoard] = None, *,
     inner_border = 1 if borders and coordinates else 0
     outer_border = 1 if borders else 0
     margin = 15 if coordinates else 0
+    board_offset = inner_border + margin + outer_border
     full_size = 2 * outer_border + 2 * margin + 2 * inner_border + 8 * SQUARE_SIZE
     svg = _svg(full_size, size)
 
@@ -351,12 +352,12 @@ def board(board: Optional[chess.BaseBoard] = None, *,
     if coordinates:
         coord_color, coord_opacity = _select_color(colors, "coord")
         for file_index, file_name in enumerate(chess.FILE_NAMES):
-            x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + inner_border + margin + outer_border
+            x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + board_offset
             # Keep some padding here to separate the ascender from the border
             svg.append(_coord(file_name, x, 1, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity))
             svg.append(_coord(file_name, x, full_size - outer_border - margin, SQUARE_SIZE, margin, True, margin, color=coord_color, opacity=coord_opacity))
         for rank_index, rank_name in enumerate(chess.RANK_NAMES):
-            y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + inner_border + margin + outer_border
+            y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + board_offset
             svg.append(_coord(rank_name, 0, y, margin, SQUARE_SIZE, False, margin, color=coord_color, opacity=coord_opacity))
             svg.append(_coord(rank_name, full_size - outer_border - margin, y, margin, SQUARE_SIZE, False, margin, color=coord_color, opacity=coord_opacity))
 
@@ -365,8 +366,8 @@ def board(board: Optional[chess.BaseBoard] = None, *,
         file_index = chess.square_file(square)
         rank_index = chess.square_rank(square)
 
-        x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + inner_border + margin + outer_border
-        y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + inner_border + margin + outer_border
+        x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + board_offset
+        y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + board_offset
 
         cls = ["square", "light" if chess.BB_LIGHT_SQUARES & bb else "dark"]
         if lastmove and square in [lastmove.from_square, lastmove.to_square]:
@@ -406,8 +407,8 @@ def board(board: Optional[chess.BaseBoard] = None, *,
         file_index = chess.square_file(check)
         rank_index = chess.square_rank(check)
 
-        x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin
-        y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + margin
+        x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + board_offset
+        y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + board_offset
 
         ET.SubElement(svg, "rect", _attrs({
             "x": x,
@@ -423,8 +424,8 @@ def board(board: Optional[chess.BaseBoard] = None, *,
         file_index = chess.square_file(square)
         rank_index = chess.square_rank(square)
 
-        x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + margin
-        y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + margin
+        x = (file_index if orientation else 7 - file_index) * SQUARE_SIZE + board_offset
+        y = (7 - rank_index if orientation else rank_index) * SQUARE_SIZE + board_offset
 
         if board is not None:
             piece = board.piece_at(square)
@@ -463,10 +464,10 @@ def board(board: Optional[chess.BaseBoard] = None, *,
         head_file = chess.square_file(head)
         head_rank = chess.square_rank(head)
 
-        xtail = outer_border + margin + inner_border + (tail_file + 0.5 if orientation else 7.5 - tail_file) * SQUARE_SIZE
-        ytail = outer_border + margin + inner_border + (7.5 - tail_rank if orientation else tail_rank + 0.5) * SQUARE_SIZE
-        xhead = outer_border + margin + inner_border + (head_file + 0.5 if orientation else 7.5 - head_file) * SQUARE_SIZE
-        yhead = outer_border + margin + inner_border + (7.5 - head_rank if orientation else head_rank + 0.5) * SQUARE_SIZE
+        xtail = board_offset + (tail_file + 0.5 if orientation else 7.5 - tail_file) * SQUARE_SIZE
+        ytail = board_offset + (7.5 - tail_rank if orientation else tail_rank + 0.5) * SQUARE_SIZE
+        xhead = board_offset + (head_file + 0.5 if orientation else 7.5 - head_file) * SQUARE_SIZE
+        yhead = board_offset + (7.5 - head_rank if orientation else head_rank + 0.5) * SQUARE_SIZE
 
         if (head_file, head_rank) == (tail_file, tail_rank):
             ET.SubElement(svg, "circle", _attrs({

From 0e7fabc8ae0127a994aaece31e3c69a510cef527 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 27 Sep 2024 17:37:16 +0200
Subject: [PATCH 554/613] Test reading PGN with UTF-8 BOM

---
 data/pgn/utf8-bom.pgn | 26 ++++++++++++++++++++++++++
 test.py               | 12 ++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 data/pgn/utf8-bom.pgn

diff --git a/data/pgn/utf8-bom.pgn b/data/pgn/utf8-bom.pgn
new file mode 100644
index 000000000..665e7775a
--- /dev/null
+++ b/data/pgn/utf8-bom.pgn
@@ -0,0 +1,26 @@
+[Event "A"]
+[Site "?"]
+[Date "2024.04.25"]
+[Round "?"]
+[White "White vs 1...c5"]
+[Black "?"]
+[Result "*"]
+[ECO "A00"]
+[PlyCount "0"]
+[SourceVersionDate "2024.04.25"]
+
+ *
+
+[Event "B"]
+[Site "?"]
+[Date "2024.04.25"]
+[Round "?"]
+[White "White vs 1...c5"]
+[Black "?"]
+[Result "*"]
+[ECO "A00"]
+[PlyCount "0"]
+[SourceVersionDate "2024.04.25"]
+
+ *
+
diff --git a/test.py b/test.py
index 438628b98..6102eabdb 100755
--- a/test.py
+++ b/test.py
@@ -2947,6 +2947,18 @@ def end_variation(self):
         game = chess.pgn.read_game(io.StringIO(pgn)).accept(BlackVariationsOnly())
         self.assertEqual(game.accept(chess.pgn.StringExporter(headers=False)), expected_pgn)
 
+    def test_utf8_bom(self):
+        not_utf8_sig = "utf-8"
+        with open("data/pgn/utf8-bom.pgn", encoding=not_utf8_sig) as pgn:
+            game = chess.pgn.read_game(pgn)
+            self.assertEqual(game.headers["Event"], "A")
+
+            game = chess.pgn.read_game(pgn)
+            self.assertEqual(game.headers["Event"], "B")
+
+            game = chess.pgn.read_game(pgn)
+            self.assertEqual(game, None)
+
 
 @unittest.skipIf(sys.platform == "win32" and (3, 8, 0) <= sys.version_info < (3, 8, 1), "https://bugs.python.org/issue34679")
 class EngineTestCase(unittest.TestCase):

From c0d3c9171d22d0168a6cf7a584cdcf50909832e6 Mon Sep 17 00:00:00 2001
From: evidencebp 
Date: Thu, 3 Oct 2024 14:33:20 +0300
Subject: [PATCH 555/613] chess\__init__.py  superfluous-parens

There are two such alerts in this file. One has two terms and the parentheses do not contribute to readability. The other term is longer and the parenthesis help to  readability   and therefore are kept.
---
 chess/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 55bd4cad2..9d6e869fe 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -3402,7 +3402,7 @@ def clean_castling_rights(self) -> Bitboard:
             if white_h_side and msb(white_h_side) < msb(white_king_mask):
                 white_h_side = 0
 
-            black_a_side = (black_castling & -black_castling)
+            black_a_side = black_castling & -black_castling
             black_h_side = BB_SQUARES[msb(black_castling)] if black_castling else BB_EMPTY
 
             if black_a_side and msb(black_a_side) > msb(black_king_mask):

From 30d991046908ce7c5a7929987c1c2081f68641b4 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 4 Oct 2024 18:33:54 +0200
Subject: [PATCH 556/613] Prepare 1.11.0

---
 CHANGELOG.rst     | 4 ++--
 chess/__init__.py | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 9a0a16e6c..296079f24 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,8 +1,8 @@
 Changelog for python-chess
 ==========================
 
-Upcoming in the next release
-----------------------------
+New in v1.11.0 (4th Oct 2024)
+-----------------------------
 
 Changes:
 
diff --git a/chess/__init__.py b/chess/__init__.py
index 9d6e869fe..147f24be7 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -11,7 +11,7 @@
 
 __email__ = "niklas.fiekas@backscattering.de"
 
-__version__ = "1.10.0"
+__version__ = "1.11.0"
 
 import collections
 import copy

From 46c28883f7846f87f419c5c83e7c61e3cdea5d36 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 4 Oct 2024 18:44:53 +0200
Subject: [PATCH 557/613] Revert "Removed unnecessary indentation blocks and
 updated conditional statements."

This reverts commit 4a6dd9a89b7810312ab4ea1cf255d1a501ae09ca.
---
 release.py | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/release.py b/release.py
index f2f7d81fa..d27ddf04e 100755
--- a/release.py
+++ b/release.py
@@ -10,7 +10,7 @@
 def system(command):
     print(command)
     exit_code = os.system(command)
-    if exit_code:
+    if exit_code != 0:
         sys.exit(exit_code)
 
 
@@ -21,7 +21,7 @@ def check_git():
 
     system("git fetch origin")
     behind = int(subprocess.check_output(["git", "rev-list", "--count", "master..origin/master"]))
-    if behind:
+    if behind > 0:
         print(f"master is {behind} commit(s) behind origin/master")
         sys.exit(1)
 
@@ -65,14 +65,15 @@ def tag_and_push():
             release_txt.write(headline + os.linesep)
 
             for line in changelog_file:
-                if line.startswith("-------") and not first_section:
-                    first_section = True
+                if not first_section:
+                    if line.startswith("-------"):
+                        first_section = True
                 else:
                     if line.startswith("-------"):
                         break
-
-                    if not prev_line.startswith("------"):
-                        release_txt.write(prev_line)
+                    else:
+                        if not prev_line.startswith("------"):
+                            release_txt.write(prev_line)
 
                 prev_line = line
 

From 08697b298d87e4fa01842bd82af96d71cb972c90 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 4 Oct 2024 18:57:48 +0200
Subject: [PATCH 558/613] Fix twine usage, stop uploading wheels

---
 release.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/release.py b/release.py
index d27ddf04e..4057ab785 100755
--- a/release.py
+++ b/release.py
@@ -97,9 +97,9 @@ def tag_and_push():
 def pypi():
     print("--- PYPI ---------------------------------------------------------")
     system("rm -rf build")
-    system("python3 setup.py sdist bdist_wheel")
+    system("python3 setup.py sdist")
     system("twine check dist/*")
-    system("twine upload --skip-existing")
+    system("twine upload --skip-existing dist/*")
 
 
 def github_release(tagname):

From 611221de07fa7679b5d00b712cf8472ce66e6b38 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Mon, 7 Oct 2024 20:08:23 -0700
Subject: [PATCH 559/613] Fix error when parsing UCI options

The regex that splits a UCI option into parts did not include word
boundries, so words like "mini" would be split into "min" and "i",
leading to parse errors. This commit puts word boundries into the regex
to fix this.

Fixes #1112
---
 chess/engine.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index ccd6894d2..270e31e71 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1367,7 +1367,8 @@ def _option(self, arg: str) -> None:
                 var = []
 
                 parameters = list(option_parts.keys()) + ['var']
-                option_regex = fr"\s*({'|'.join(parameters)})\s*"
+                inner_regex = '|'.join([fr"\b{parameter}\b" for parameter in parameters])
+                option_regex = fr"\s*({inner_regex})\s*"
                 for token in re.split(option_regex, arg.strip()):
                     if token == "var" or (token in option_parts and not option_parts[token]):
                         current_parameter = token

From 54b18de726e0f1d06f89f35104c66ddeb527fac7 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Mon, 7 Oct 2024 22:38:29 -0700
Subject: [PATCH 560/613] Add test for options fix

Test uses fairy-stockfish since that engine revealed the original bug.
---
 test.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/test.py b/test.py
index 2a1df1c85..9903b208d 100755
--- a/test.py
+++ b/test.py
@@ -3142,6 +3142,11 @@ def test_sf_quit(self):
         with self.assertRaises(chess.engine.EngineTerminatedError), engine:
             engine.ping()
 
+    @catchAndSkip(FileNotFoundError, "need fairy-stockfish")
+    def test_fairy_sf_initialize(self):
+        with chess.engine.SimpleEngine.popen_uci("fairy-stockfish", setpgrp=True, debug=True):
+            pass
+
     @catchAndSkip(FileNotFoundError, "need crafty")
     def test_crafty_play_to_mate(self):
         logging.disable(logging.WARNING)

From ebb687c5dab328d91a055b1f63dabf6c28739ed2 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Mon, 7 Oct 2024 22:58:59 -0700
Subject: [PATCH 561/613] Make test functional by installing fairy-stockfish

---
 .github/workflows/setup-ubuntu-latest.sh  | 3 +++
 .github/workflows/setup-windows-latest.sh | 6 +++++-
 tox.ini                                   | 1 +
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/setup-ubuntu-latest.sh b/.github/workflows/setup-ubuntu-latest.sh
index fae35b61a..10b8d1115 100755
--- a/.github/workflows/setup-ubuntu-latest.sh
+++ b/.github/workflows/setup-ubuntu-latest.sh
@@ -6,6 +6,9 @@ sudo apt-get install -y stockfish
 # Crafty
 sudo apt-get install -y crafty
 
+# Fairy-stockfish
+sudo apt-get install -y fairy-stockfish
+
 # Gaviota libgtb
 git clone https://github.com/michiguel/Gaviota-Tablebases.git --depth 1
 cd Gaviota-Tablebases
diff --git a/.github/workflows/setup-windows-latest.sh b/.github/workflows/setup-windows-latest.sh
index 815eb0db2..48037cbef 100755
--- a/.github/workflows/setup-windows-latest.sh
+++ b/.github/workflows/setup-windows-latest.sh
@@ -1,6 +1,6 @@
 #!/bin/sh -e
 
-echo Download ...
+echo Download stockfish ...
 choco install wget
 wget https://github.com/official-stockfish/Stockfish/releases/download/sf_16/stockfish-windows-x86-64-avx2.zip
 
@@ -10,3 +10,7 @@ echo Unzip ..
 echo Setup path ...
 mv stockfish-windows-x86-64-avx2.exe stockfish.exe
 pwd >> $GITHUB_PATH
+
+echo Download fairy-stockfish ...
+wget https://github.com/fairy-stockfish/Fairy-Stockfish/releases/latest/download/fairy-stockfish-largeboard_x86-64.exe
+mv fairy-stockfish-largeboard_x86-64.exe fairy-stockfish.exe
diff --git a/tox.ini b/tox.ini
index f629723cd..8d8033676 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,6 +6,7 @@ passenv = LD_LIBRARY_PATH
 whitelist_externals =
     stockfish
     crafty
+    fairy-stockfish
 commands =
     python test.py --verbose
     python -m doctest README.rst --verbose

From c0ac01b784bf1c63abb325424ea9e7bb2cb3f44e Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Mon, 7 Oct 2024 23:13:27 -0700
Subject: [PATCH 562/613] Add test using MockTransport

---
 test.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/test.py b/test.py
index 9903b208d..e490daa90 100755
--- a/test.py
+++ b/test.py
@@ -3147,6 +3147,21 @@ def test_fairy_sf_initialize(self):
         with chess.engine.SimpleEngine.popen_uci("fairy-stockfish", setpgrp=True, debug=True):
             pass
 
+    def test_uci_option_parse(self):
+        async def main():
+            protocol = chess.engine.UciProtocol()
+            mock = chess.engine.MockTransport(protocol)
+
+            mock.expect("uci", ["option name UCI_Variant type combo default chess var bughouse var chess var mini var minishogi var threekings", "uciok"])
+            await protocol.initialize()
+            mock.assert_done()
+
+            mock.expect("isready", ["readyok"])
+            await protocol.ping()
+            mock.assert_done()
+
+        asyncio.run(main())
+
     @catchAndSkip(FileNotFoundError, "need crafty")
     def test_crafty_play_to_mate(self):
         logging.disable(logging.WARNING)

From fa4f0148f683c8e59ffa762f93045f9edfc69994 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Tue, 8 Oct 2024 22:07:21 +0200
Subject: [PATCH 563/613] Merge pull request #1113 from MarkZH/options-fix

Fix error when parsing UCI options
---
 .github/workflows/setup-ubuntu-latest.sh  |  3 +++
 .github/workflows/setup-windows-latest.sh |  6 +++++-
 chess/engine.py                           |  3 ++-
 test.py                                   | 20 ++++++++++++++++++++
 tox.ini                                   |  1 +
 5 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/setup-ubuntu-latest.sh b/.github/workflows/setup-ubuntu-latest.sh
index fae35b61a..10b8d1115 100755
--- a/.github/workflows/setup-ubuntu-latest.sh
+++ b/.github/workflows/setup-ubuntu-latest.sh
@@ -6,6 +6,9 @@ sudo apt-get install -y stockfish
 # Crafty
 sudo apt-get install -y crafty
 
+# Fairy-stockfish
+sudo apt-get install -y fairy-stockfish
+
 # Gaviota libgtb
 git clone https://github.com/michiguel/Gaviota-Tablebases.git --depth 1
 cd Gaviota-Tablebases
diff --git a/.github/workflows/setup-windows-latest.sh b/.github/workflows/setup-windows-latest.sh
index 815eb0db2..48037cbef 100755
--- a/.github/workflows/setup-windows-latest.sh
+++ b/.github/workflows/setup-windows-latest.sh
@@ -1,6 +1,6 @@
 #!/bin/sh -e
 
-echo Download ...
+echo Download stockfish ...
 choco install wget
 wget https://github.com/official-stockfish/Stockfish/releases/download/sf_16/stockfish-windows-x86-64-avx2.zip
 
@@ -10,3 +10,7 @@ echo Unzip ..
 echo Setup path ...
 mv stockfish-windows-x86-64-avx2.exe stockfish.exe
 pwd >> $GITHUB_PATH
+
+echo Download fairy-stockfish ...
+wget https://github.com/fairy-stockfish/Fairy-Stockfish/releases/latest/download/fairy-stockfish-largeboard_x86-64.exe
+mv fairy-stockfish-largeboard_x86-64.exe fairy-stockfish.exe
diff --git a/chess/engine.py b/chess/engine.py
index ccd6894d2..270e31e71 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1367,7 +1367,8 @@ def _option(self, arg: str) -> None:
                 var = []
 
                 parameters = list(option_parts.keys()) + ['var']
-                option_regex = fr"\s*({'|'.join(parameters)})\s*"
+                inner_regex = '|'.join([fr"\b{parameter}\b" for parameter in parameters])
+                option_regex = fr"\s*({inner_regex})\s*"
                 for token in re.split(option_regex, arg.strip()):
                     if token == "var" or (token in option_parts and not option_parts[token]):
                         current_parameter = token
diff --git a/test.py b/test.py
index 6102eabdb..9e2f9d166 100755
--- a/test.py
+++ b/test.py
@@ -3134,6 +3134,26 @@ def test_sf_quit(self):
         with self.assertRaises(chess.engine.EngineTerminatedError), engine:
             engine.ping()
 
+    @catchAndSkip(FileNotFoundError, "need fairy-stockfish")
+    def test_fairy_sf_initialize(self):
+        with chess.engine.SimpleEngine.popen_uci("fairy-stockfish", setpgrp=True, debug=True):
+            pass
+
+    def test_uci_option_parse(self):
+        async def main():
+            protocol = chess.engine.UciProtocol()
+            mock = chess.engine.MockTransport(protocol)
+
+            mock.expect("uci", ["option name UCI_Variant type combo default chess var bughouse var chess var mini var minishogi var threekings", "uciok"])
+            await protocol.initialize()
+            mock.assert_done()
+
+            mock.expect("isready", ["readyok"])
+            await protocol.ping()
+            mock.assert_done()
+
+        asyncio.run(main())
+
     @catchAndSkip(FileNotFoundError, "need crafty")
     def test_crafty_play_to_mate(self):
         logging.disable(logging.WARNING)
diff --git a/tox.ini b/tox.ini
index f629723cd..8d8033676 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,6 +6,7 @@ passenv = LD_LIBRARY_PATH
 whitelist_externals =
     stockfish
     crafty
+    fairy-stockfish
 commands =
     python test.py --verbose
     python -m doctest README.rst --verbose

From ffc6da935642654ee13eda3bb649a8748531b960 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 9 Oct 2024 20:24:42 +0200
Subject: [PATCH 564/613] Prepare 1.11.1

---
 CHANGELOG.rst     | 8 ++++++++
 chess/__init__.py | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 296079f24..05b899a20 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,14 @@
 Changelog for python-chess
 ==========================
 
+New in v1.11.1 (9th Oct 2024)
+-----------------------------
+
+Bugfixes:
+
+* ``chess.engine``: Fix parsing of UCI options containing containing ``name``,
+  ``type``, ``default``, ``min``, or ``max``, e.g., ``mini``.
+
 New in v1.11.0 (4th Oct 2024)
 -----------------------------
 
diff --git a/chess/__init__.py b/chess/__init__.py
index 147f24be7..a6a66500e 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -11,7 +11,7 @@
 
 __email__ = "niklas.fiekas@backscattering.de"
 
-__version__ = "1.11.0"
+__version__ = "1.11.1"
 
 import collections
 import copy

From 7f123cb5dd858978de4a32b7d2c8f8ea71a3552c Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 9 Oct 2024 20:35:10 +0200
Subject: [PATCH 565/613] Remove chess.svg.board(..., flipped), use orientation
 (#659)

---
 chess/svg.py | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/chess/svg.py b/chess/svg.py
index c665b171b..7e8facf99 100644
--- a/chess/svg.py
+++ b/chess/svg.py
@@ -227,7 +227,6 @@ def board(board: Optional[chess.BaseBoard] = None, *,
           size: Optional[int] = None,
           coordinates: bool = True,
           colors: Dict[str, str] = {},
-          flipped: bool = False,
           borders: bool = False,
           style: Optional[str] = None) -> str:
     """
@@ -255,7 +254,6 @@ def board(board: Optional[chess.BaseBoard] = None, *,
         ``outer border``, ``arrow green``, ``arrow blue``, ``arrow red``,
         and ``arrow yellow``. Values should look like ``#ffce9e`` (opaque),
         or ``#15781B80`` (transparent).
-    :param flipped: Pass ``True`` to flip the board.
     :param borders: Pass ``True`` to enable a border around the board and,
        (if *coordinates* is enabled) the coordinate margin.
     :param style: A CSS stylesheet to include in the SVG image.
@@ -275,11 +273,7 @@ def board(board: Optional[chess.BaseBoard] = None, *,
 
     .. image:: ../docs/Ne4.svg
         :alt: 8/8/8/8/4N3/8/8/8
-
-    .. deprecated:: 1.1
-        Use *orientation* with a color instead of the *flipped* toggle.
     """
-    orientation ^= flipped
     inner_border = 1 if borders and coordinates else 0
     outer_border = 1 if borders else 0
     margin = 15 if coordinates else 0

From f2b0452389c4272948b253ac6266eb89ac85c179 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 9 Oct 2024 20:37:08 +0200
Subject: [PATCH 566/613] Remove deprecated chess.pgn.BaseVisitor.parse_san()
 (#659)

---
 chess/pgn.py | 18 +-----------------
 1 file changed, 1 insertion(+), 17 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index bded9ae5d..eddb6bc52 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -1104,22 +1104,6 @@ def begin_parse_san(self, board: chess.Board, san: str) -> Optional[SkipType]:
         """
         pass
 
-    def parse_san(self, board: chess.Board, san: str) -> chess.Move:
-        """
-        When the visitor is used by a parser, this is called to parse a move
-        in standard algebraic notation.
-
-        You can override the default implementation to work around specific
-        quirks of your input format.
-
-        .. deprecated:: 1.1
-            This method is very limited, because it is only called on moves
-            that the parser recognizes in the first place. Instead of adding
-            workarounds here, please report common quirks so that
-            they can be handled for everyone.
-        """
-        return board.parse_san(san)
-
     def visit_move(self, board: chess.Board, move: chess.Move) -> None:
         """
         Called for each move.
@@ -1751,7 +1735,7 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any:
                 # Parse SAN tokens.
                 if visitor.begin_parse_san(board_stack[-1], token) is not SKIP:
                     try:
-                        move = visitor.parse_san(board_stack[-1], token)
+                        move = board_stack[-1].parse_san(token)
                     except ValueError as error:
                         visitor.handle_error(error)
                         skip_variation_depth = 1

From b2657ebc4768e2815cb8ddeb8c9ed13109332e15 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 9 Oct 2024 20:41:43 +0200
Subject: [PATCH 567/613] Remove deprecated chess.engine.Wdl tuple behavior
 (#659)

---
 chess/engine.py | 45 +--------------------------------------------
 test.py         |  2 +-
 2 files changed, 2 insertions(+), 45 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 270e31e71..64a3926b7 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -720,16 +720,11 @@ def __str__(self) -> str:
 MateGiven = MateGivenType()
 
 
+@dataclasses.dataclass
 class PovWdl:
     """
     Relative :class:`win/draw/loss statistics ` and the point
     of view.
-
-    .. deprecated:: 1.2
-        Behaves like a tuple
-        ``(wdl.relative.wins, wdl.relative.draws, wdl.relative.losses)``
-        for backwards compatibility. But it is recommended to use the provided
-        fields and methods instead.
     """
 
     relative: Wdl
@@ -738,10 +733,6 @@ class PovWdl:
     turn: Color
     """The point of view (``chess.WHITE`` or ``chess.BLACK``)."""
 
-    def __init__(self, relative: Wdl, turn: Color) -> None:
-        self.relative = relative
-        self.turn = turn
-
     def white(self) -> Wdl:
         """Gets the :class:`~chess.engine.Wdl` from White's point of view."""
         return self.pov(chess.WHITE)
@@ -763,30 +754,6 @@ def __bool__(self) -> bool:
     def __repr__(self) -> str:
         return "PovWdl({!r}, {})".format(self.relative, "WHITE" if self.turn else "BLACK")
 
-    # Unfortunately in python-chess v1.1.0, info["wdl"] was a simple tuple
-    # of the relative permille values, so we have to support __iter__,
-    # __len__, __getitem__, and equality comparisons with other tuples.
-    # Never mind the ordering, because that's not a sensible operation, anyway.
-
-    def __iter__(self) -> Iterator[int]:
-        yield self.relative.wins
-        yield self.relative.draws
-        yield self.relative.losses
-
-    def __len__(self) -> int:
-        return 3
-
-    def __getitem__(self, idx: int) -> int:
-        return (self.relative.wins, self.relative.draws, self.relative.losses)[idx]
-
-    def __eq__(self, other: object) -> bool:
-        if isinstance(other, PovWdl):
-            return self.white() == other.white()
-        elif isinstance(other, tuple):
-            return (self.relative.wins, self.relative.draws, self.relative.losses) == other
-        else:
-            return NotImplemented
-
 
 @dataclasses.dataclass
 class Wdl:
@@ -830,16 +797,6 @@ def expectation(self) -> float:
     def __bool__(self) -> bool:
         return bool(self.total())
 
-    def __iter__(self) -> Iterator[int]:
-        yield self.wins
-        yield self.draws
-        yield self.losses
-
-    def __reversed__(self) -> Iterator[int]:
-        yield self.losses
-        yield self.draws
-        yield self.wins
-
     def __pos__(self) -> Wdl:
         return self
 
diff --git a/test.py b/test.py
index e490daa90..68904a50e 100755
--- a/test.py
+++ b/test.py
@@ -3540,7 +3540,7 @@ def test_uci_info(self):
 
         # WDL (activated with UCI_ShowWDL).
         info = chess.engine._parse_uci_info("depth 1 seldepth 2 time 16 nodes 1 score cp 72 wdl 249 747 4 hashfull 0 nps 400 tbhits 0 multipv 1", board)
-        self.assertEqual(info["wdl"], (249, 747, 4))
+        self.assertEqual(info["wdl"].white(), chess.engine.Wdl(249, 747, 4))
 
     def test_uci_result(self):
         async def main():

From 6228bac55b8e680362f35e69c1c72a4d53d00cf4 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 12 Oct 2024 20:50:29 +0200
Subject: [PATCH 568/613] Update Sphinx

---
 docs/requirements.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/requirements.txt b/docs/requirements.txt
index 7516f64de..c04e3554a 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,3 @@
-Sphinx==7.3.6
+Sphinx==8.1.2
 sphinxcontrib-jquery==4.1
-sphinx-rtd-theme==1.3.0
+sphinx-rtd-theme==3.0.1

From e2041699939d7ae08811fe7a1391e8910d5ec62a Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 13 Oct 2024 11:12:49 +0200
Subject: [PATCH 569/613] Towards passing pyright

---
 chess/__init__.py | 10 +++++++---
 chess/engine.py   |  2 +-
 chess/syzygy.py   |  1 +
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 147f24be7..4f5791f7c 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -1218,6 +1218,8 @@ def _set_chess960_pos(self, scharnagl: int) -> None:
         n, bb = divmod(n, 4)
         n, q = divmod(n, 6)
 
+        n1 = 0
+        n2 = 0
         for n1 in range(0, 4):
             n2 = n + (3 - n1) * (4 - n1) // 2 - 5
             if n1 < n2 and 1 <= n2 <= 4:
@@ -2394,7 +2396,7 @@ def push(self, move: Move) -> None:
             elif move.to_square == ep_square and abs(diff) in [7, 9] and not captured_piece_type:
                 # Remove pawns captured en passant.
                 down = -8 if self.turn == WHITE else 8
-                capture_square = ep_square + down
+                capture_square = move.to_square + down
                 captured_piece_type = self._remove_piece_at(capture_square)
 
         # Promotion.
@@ -3166,6 +3168,8 @@ def parse_san(self, san: str) -> Move:
 
         # Filter by original square.
         from_mask = BB_ALL
+        from_file = None
+        from_rank = None
         if match.group(2):
             from_file = FILE_NAMES.index(match.group(2))
             from_mask &= BB_FILES[from_file]
@@ -3177,7 +3181,7 @@ def parse_san(self, san: str) -> Move:
         if match.group(1):
             piece_type = PIECE_SYMBOLS.index(match.group(1).lower())
             from_mask &= self.pieces_mask(piece_type, self.turn)
-        elif match.group(2) and match.group(3):
+        elif from_file is not None and from_rank is not None:
             # Allow fully specified moves, even if they are not pawn moves,
             # including castling moves.
             move = self.find_move(square(from_file, from_rank), to_square, promotion)
@@ -3189,7 +3193,7 @@ def parse_san(self, san: str) -> Move:
             from_mask &= self.pawns
 
             # Do not allow pawn captures if file is not specified.
-            if not match.group(2):
+            if from_file is None:
                 from_mask &= BB_FILES[square_file(to_square)]
 
         # Match legal moves.
diff --git a/chess/engine.py b/chess/engine.py
index 64a3926b7..c961d0da1 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -826,7 +826,7 @@ def get_pipe_transport(self, fd: int) -> Optional[asyncio.BaseTransport]:
         assert fd == 0, f"expected 0 for stdin, got {fd}"
         return self
 
-    def write(self, data: bytes) -> None:
+    def write(self, data: bytes | bytearray | memoryview) -> None:
         self.stdin_buffer.extend(data)
         while b"\n" in self.stdin_buffer:
             line_bytes, self.stdin_buffer = self.stdin_buffer.split(b"\n", 1)
diff --git a/chess/syzygy.py b/chess/syzygy.py
index 77a6eeded..89f8c2596 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -780,6 +780,7 @@ def encode_piece(self, norm: List[int], pos: List[chess.Square], factor: List[in
                 for i in range(n):
                     pos[i] ^= 0x38
 
+            i = 0
             for i in range(n):
                 if offdiag(pos[i]):
                     break

From c42749dee7e06f1215ad159d58452d571810b8db Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 13 Oct 2024 11:49:05 +0200
Subject: [PATCH 570/613] Make chess.engine.Protocol.options an abstract
 property

---
 chess/engine.py | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index c961d0da1..3f1e0e399 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -852,9 +852,6 @@ def get_returncode(self) -> Optional[int]:
 class Protocol(asyncio.SubprocessProtocol, metaclass=abc.ABCMeta):
     """Protocol for communicating with a chess engine process."""
 
-    options: MutableMapping[str, Option]
-    """Dictionary of available options."""
-
     id: Dict[str, str]
     """
     Dictionary of information about the engine. Common keys are ``name``
@@ -981,6 +978,11 @@ def __repr__(self) -> str:
         pid = self.transport.get_pid() if self.transport is not None else "?"
         return f"<{type(self).__name__} (pid={pid})>"
 
+    @property
+    @abc.abstractmethod
+    def options(self) -> MutableMapping[str, Option]:
+        """Dictionary of available options."""
+
     @abc.abstractmethod
     async def initialize(self) -> None:
         """Initializes the engine."""
@@ -1281,7 +1283,7 @@ class UciProtocol(Protocol):
 
     def __init__(self) -> None:
         super().__init__()
-        self.options: UciOptionMap[Option] = UciOptionMap()
+        self._options: UciOptionMap[Option] = UciOptionMap()
         self.config: UciOptionMap[ConfigValue] = UciOptionMap()
         self.target_config: UciOptionMap[ConfigValue] = UciOptionMap()
         self.id = {}
@@ -1291,6 +1293,11 @@ def __init__(self) -> None:
         self.may_ponderhit: Optional[chess.Board] = None
         self.ponderhit = False
 
+    @property
+    @override
+    def options(self) -> UciOptionMap[Option]:
+        return self._options
+
     async def initialize(self) -> None:
         class UciInitializeCommand(BaseCommand[None]):
             def __init__(self, engine: UciProtocol):
@@ -1939,7 +1946,7 @@ def __init__(self) -> None:
         super().__init__()
         self.features: Dict[str, Union[int, str]] = {}
         self.id = {}
-        self.options = {
+        self._options = {
             "random": Option("random", "check", False, None, None, None),
             "computer": Option("computer", "check", False, None, None, None),
             "name": Option("name", "string", "", None, None, None),
@@ -1953,6 +1960,11 @@ def __init__(self) -> None:
         self.clock_id: object = None
         self.first_game = True
 
+    @property
+    @override
+    def options(self) -> Dict[str, Option]:
+        return self._options
+
     async def initialize(self) -> None:
         class XBoardInitializeCommand(BaseCommand[None]):
             def __init__(self, engine: XBoardProtocol):

From 7553d4115f69368e2d7bf07a90773cea128d7d11 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 13 Oct 2024 12:35:01 +0200
Subject: [PATCH 571/613] Make chess.pgn.GameNode pass pyright subtyping check

---
 chess/pgn.py | 65 ++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 45 insertions(+), 20 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index eddb6bc52..20e95de50 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -16,7 +16,11 @@
 from chess import Color, Square
 
 if typing.TYPE_CHECKING:
-    from typing_extensions import Self
+    from typing_extensions import Self, override
+else:
+    F = typing.TypeVar("F", bound=Callable[..., Any])
+    def override(fn: F, /) -> F:
+        return fn
 
 
 LOGGER = logging.getLogger(__name__)
@@ -192,15 +196,6 @@ def __init__(self, node: ChildNode, *, is_variation: bool = False, sidelines: bo
 
 
 class GameNode(abc.ABC):
-    parent: Optional[GameNode]
-    """The parent node or ``None`` if this is the root node of the game."""
-
-    move: Optional[chess.Move]
-    """
-    The move leading to this node or ``None`` if this is the root node of the
-    game.
-    """
-
     variations: List[ChildNode]
     """A list of child nodes."""
 
@@ -215,8 +210,6 @@ class GameNode(abc.ABC):
     nags: Set[int]
 
     def __init__(self, *, comment: Union[str, list[str]] = "") -> None:
-        self.parent = None
-        self.move = None
         self.variations = []
         self.comments = _standardize_comments(comment)
 
@@ -225,6 +218,19 @@ def __init__(self, *, comment: Union[str, list[str]] = "") -> None:
         self.starting_comments = []
         self.nags = set()
 
+    @property
+    @abc.abstractmethod
+    def parent(self) -> Optional[GameNode]:
+        """The parent node or ``None`` if this is the root node of the game."""
+
+    @property
+    @abc.abstractmethod
+    def move(self) -> Optional[chess.Move]:
+        """
+        The move leading to this node or ``None`` if this is the root node of
+        the game.
+        """
+
     @abc.abstractmethod
     def board(self) -> chess.Board:
         """
@@ -658,12 +664,6 @@ class ChildNode(GameNode):
     Extends :class:`~chess.pgn.GameNode`.
     """
 
-    parent: GameNode
-    """The parent node."""
-
-    move: chess.Move
-    """The move leading to this node."""
-
     starting_comments: list[str]
     """
     A comment for the start of a variation. Only nodes that
@@ -680,13 +680,25 @@ class ChildNode(GameNode):
 
     def __init__(self, parent: GameNode, move: chess.Move, *, comment: Union[str, list[str]] = "", starting_comment: Union[str, list[str]] = "", nags: Iterable[int] = []) -> None:
         super().__init__(comment=comment)
-        self.parent = parent
-        self.move = move
+        self._parent = parent
+        self._move = move
         self.parent.variations.append(self)
 
         self.nags.update(nags)
         self.starting_comments = _standardize_comments(starting_comment)
 
+    @property
+    @override
+    def parent(self) -> GameNode:
+        """The parent node."""
+        return self._parent
+
+    @property
+    @override
+    def move(self) -> chess.Move:
+        """The move leading to this node."""
+        return self._move
+
     def board(self) -> chess.Board:
         stack: List[chess.Move] = []
         node: GameNode = self
@@ -838,9 +850,21 @@ def __init__(self, headers: Optional[Union[Mapping[str, str], Iterable[Tuple[str
         self.headers = Headers(headers)
         self.errors = []
 
+    @property
+    @override
+    def parent(self) -> None:
+        return None
+
+    @property
+    @override
+    def move(self) -> None:
+        return None
+
+    @override
     def board(self) -> chess.Board:
         return self.headers.board()
 
+    @override
     def ply(self) -> int:
         # Optimization: Parse FEN only for custom starting positions.
         return self.board().ply() if "FEN" in self.headers else 0
@@ -873,6 +897,7 @@ def setup(self, board: Union[chess.Board, str]) -> None:
         else:
             self.headers.pop("Variant", None)
 
+    @override
     def accept(self, visitor: BaseVisitor[ResultT]) -> ResultT:
         """
         Traverses the game in PGN order using the given *visitor*. Returns

From f7736478cbe6e99bb77a7719bfafa79e9a40eef0 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 13 Oct 2024 12:35:28 +0200
Subject: [PATCH 572/613] Initialize board_stack even on skip_game path

---
 chess/pgn.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/chess/pgn.py b/chess/pgn.py
index 20e95de50..11d7aa760 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -1575,6 +1575,7 @@ def read_game(handle: TextIO, *, Visitor: Any = GameBuilder) -> Any:
     skipping_game = False
     managed_headers: Optional[Headers] = None
     unmanaged_headers: Optional[Headers] = None
+    board_stack: List[chess.Board] = []
 
     # Ignore leading empty lines and comments.
     line = handle.readline().lstrip("\ufeff")

From 0c8fed280f5d0ea237dc5a667081665d65412643 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 13 Oct 2024 12:42:13 +0200
Subject: [PATCH 573/613] Fix builder constructor typing

---
 chess/pgn.py | 35 +++++++++++++++++++++++++++++++++--
 1 file changed, 33 insertions(+), 2 deletions(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index 11d7aa760..f40980d48 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -699,6 +699,7 @@ def move(self) -> chess.Move:
         """The move leading to this node."""
         return self._move
 
+    @override
     def board(self) -> chess.Board:
         stack: List[chess.Move] = []
         node: GameNode = self
@@ -714,6 +715,7 @@ def board(self) -> chess.Board:
 
         return board
 
+    @override
     def ply(self) -> int:
         ply = 0
         node: GameNode = self
@@ -744,6 +746,7 @@ def uci(self, *, chess960: Optional[bool] = None) -> str:
         """
         return self.parent.board().uci(self.move, chess960=chess960)
 
+    @override
     def end(self) -> ChildNode:
         """
         Follows the main variation to the end and returns the last node.
@@ -801,6 +804,7 @@ def _accept(self, parent_board: chess.Board, visitor: BaseVisitor[ResultT], *, s
             else:
                 stack.pop()
 
+    @override
     def accept(self, visitor: BaseVisitor[ResultT]) -> ResultT:
         self._accept(self.parent.board(), visitor, sidelines=False)
         return visitor.result()
@@ -1192,10 +1196,11 @@ class GameBuilder(BaseVisitor[GameT]):
     @typing.overload
     def __init__(self: GameBuilder[Game]) -> None: ...
     @typing.overload
-    def __init__(self: GameBuilder[GameT], *, Game: Type[GameT]) -> None: ...
+    def __init__(self, *, Game: Type[GameT]) -> None: ...
     def __init__(self, *, Game: Any = Game) -> None:
         self.Game = Game
 
+    @override
     def begin_game(self) -> None:
         self.game: GameT = self.Game()
 
@@ -1203,28 +1208,35 @@ def begin_game(self) -> None:
         self.starting_comments: list[str] = []
         self.in_variation = False
 
+    @override
     def begin_headers(self) -> Headers:
         return self.game.headers
 
+    @override
     def visit_header(self, tagname: str, tagvalue: str) -> None:
         self.game.headers[tagname] = tagvalue
 
+    @override
     def visit_nag(self, nag: int) -> None:
         self.variation_stack[-1].nags.add(nag)
 
+    @override
     def begin_variation(self) -> None:
         parent = self.variation_stack[-1].parent
         assert parent is not None, "begin_variation called, but root node on top of stack"
         self.variation_stack.append(parent)
         self.in_variation = False
 
+    @override
     def end_variation(self) -> None:
         self.variation_stack.pop()
 
+    @override
     def visit_result(self, result: str) -> None:
         if self.game.headers.get("Result", "*") == "*":
             self.game.headers["Result"] = result
 
+    @override
     def visit_comment(self, comment: Union[str, list[str]]) -> None:
         comments = _standardize_comments(comment)
         if self.in_variation or (self.variation_stack[-1].parent is None and self.variation_stack[-1].is_end()):
@@ -1238,12 +1250,14 @@ def visit_comment(self, comment: Union[str, list[str]]) -> None:
             self.starting_comments.extend(comments)
             self.starting_comments = list(filter(None, self.starting_comments))
 
+    @override
     def visit_move(self, board: chess.Board, move: chess.Move) -> None:
         self.variation_stack[-1] = self.variation_stack[-1].add_variation(move)
         self.variation_stack[-1].starting_comments = self.starting_comments
         self.starting_comments = []
         self.in_variation = True
 
+    @override
     def handle_error(self, error: Exception) -> None:
         """
         Populates :data:`chess.pgn.Game.errors` with encountered errors and
@@ -1277,6 +1291,7 @@ def handle_error(self, error: Exception) -> None:
         LOGGER.error("%s while parsing %r", error, self.game)
         self.game.errors.append(error)
 
+    @override
     def result(self) -> GameT:
         """
         Returns the visited :class:`~chess.pgn.Game()`.
@@ -1290,20 +1305,24 @@ class HeadersBuilder(BaseVisitor[HeadersT]):
     @typing.overload
     def __init__(self: HeadersBuilder[Headers]) -> None: ...
     @typing.overload
-    def __init__(self: HeadersBuilder[HeadersT], *, Headers: Type[Headers]) -> None: ...
+    def __init__(self, *, Headers: Type[HeadersT]) -> None: ...
     def __init__(self, *, Headers: Any = Headers) -> None:
         self.Headers = Headers
 
+    @override
     def begin_headers(self) -> HeadersT:
         self.headers: HeadersT = self.Headers({})
         return self.headers
 
+    @override
     def visit_header(self, tagname: str, tagvalue: str) -> None:
         self.headers[tagname] = tagvalue
 
+    @override
     def end_headers(self) -> SkipType:
         return SKIP
 
+    @override
     def result(self) -> HeadersT:
         return self.headers
 
@@ -1314,20 +1333,25 @@ class BoardBuilder(BaseVisitor[chess.Board]):
     on the move stack.
     """
 
+    @override
     def begin_game(self) -> None:
         self.skip_variation_depth = 0
 
+    @override
     def begin_variation(self) -> SkipType:
         self.skip_variation_depth += 1
         return SKIP
 
+    @override
     def end_variation(self) -> None:
         self.skip_variation_depth = max(self.skip_variation_depth - 1, 0)
 
+    @override
     def visit_board(self, board: chess.Board) -> None:
         if not self.skip_variation_depth:
             self.board = board
 
+    @override
     def result(self) -> chess.Board:
         return self.board
 
@@ -1335,15 +1359,19 @@ def result(self) -> chess.Board:
 class SkipVisitor(BaseVisitor[Literal[True]]):
     """Skips a game."""
 
+    @override
     def begin_game(self) -> SkipType:
         return SKIP
 
+    @override
     def end_headers(self) -> SkipType:
         return SKIP
 
+    @override
     def begin_variation(self) -> SkipType:
         return SKIP
 
+    @override
     def result(self) -> Literal[True]:
         return True
 
@@ -1458,6 +1486,7 @@ class StringExporter(StringExporterMixin, BaseVisitor[str]):
     There will be no newline characters at the end of the string.
     """
 
+    @override
     def result(self) -> str:
         if self.current_line:
             return "\n".join(itertools.chain(self.lines, [self.current_line.rstrip()])).rstrip()
@@ -1489,6 +1518,7 @@ def __init__(self, handle: TextIO, *, columns: Optional[int] = 80, headers: bool
         super().__init__(columns=columns, headers=headers, comments=comments, variations=variations)
         self.handle = handle
 
+    @override
     def begin_game(self) -> None:
         self.written: int = 0
         super().begin_game()
@@ -1504,6 +1534,7 @@ def write_line(self, line: str = "") -> None:
         self.written += self.handle.write(line.rstrip())
         self.written += self.handle.write("\n")
 
+    @override
     def result(self) -> int:
         return self.written
 

From ef13fdbfdb03a10e520a834b32e8a6cac988323a Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 13 Oct 2024 12:44:42 +0200
Subject: [PATCH 574/613] Run pyright in CI

---
 .github/workflows/test.yml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 576d8b491..ffe0c4bc5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -35,7 +35,7 @@ jobs:
       - run: python examples/perft/perft.py -t 1 --variant horde examples/perft/horde.perft
       - run: python examples/perft/perft.py -t 1 --variant crazyhouse examples/perft/crazyhouse.perft
       - run: python examples/perft/perft.py -t 1 --variant 3check examples/perft/3check.perft
-  mypy:
+  typing:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
@@ -50,6 +50,9 @@ jobs:
       - run: pip install mypy
       - run: python -m mypy --strict chess
       - run: python -m mypy --strict examples/**/*.py
+      - run: pip install pyright
+      - run: python -m pyright chess
+      - run: python -m pyright --strict examples/**/*.py
   readme:
     runs-on: ubuntu-latest
     steps:

From 100b1c8b21846c0a9db2f237621368e02294da5f Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 13 Oct 2024 12:45:44 +0200
Subject: [PATCH 575/613] Fixup pyright usage in CI

---
 .github/workflows/test.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ffe0c4bc5..035b7f3d1 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -52,7 +52,7 @@ jobs:
       - run: python -m mypy --strict examples/**/*.py
       - run: pip install pyright
       - run: python -m pyright chess
-      - run: python -m pyright --strict examples/**/*.py
+      - run: python -m pyright examples/**/*.py
   readme:
     runs-on: ubuntu-latest
     steps:

From 4549a1dd5d58661c89ea7a0fd33ae2a3d8e308d8 Mon Sep 17 00:00:00 2001
From: Alexander Lyashuk 
Date: Sat, 26 Oct 2024 11:36:00 +0200
Subject: [PATCH 576/613] Add 'movesleft' parameter to UCI info parsing

---
 chess/engine.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 3f1e0e399..b979b278f 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1771,7 +1771,8 @@ def _parse_uci_info(arg: str, root_board: chess.Board, selector: Info = INFO_ALL
         if parameter == "string":
             info["string"] = remaining_line
             break
-        elif parameter in ["depth", "seldepth", "nodes", "multipv", "currmovenumber", "hashfull", "nps", "tbhits", "cpuload"]:
+        elif parameter in ["depth", "seldepth", "nodes", "multipv", "currmovenumber",
+                           "hashfull", "nps", "tbhits", "cpuload", "movesleft"]:
             try:
                 number, remaining_line = _next_token(remaining_line)
                 info[parameter] = int(number)  # type: ignore

From f1676d51191dbc36cc7d03b4de4da34526e99f88 Mon Sep 17 00:00:00 2001
From: Alexander Lyashuk 
Date: Sat, 26 Oct 2024 11:41:50 +0200
Subject: [PATCH 577/613] Added a test.

---
 test.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/test.py b/test.py
index 68904a50e..6db84d254 100755
--- a/test.py
+++ b/test.py
@@ -3508,14 +3508,15 @@ def test_uci_info(self):
         self.assertEqual(info["seldepth"], 8)
         self.assertEqual(info["score"], chess.engine.PovScore(chess.engine.Mate(+3), chess.WHITE))
 
-        # Info: tbhits, cpuload, hashfull, time, nodes, nps.
-        info = chess.engine._parse_uci_info("tbhits 123 cpuload 456 hashfull 789 time 987 nodes 654 nps 321", board)
+        # Info: tbhits, cpuload, hashfull, time, nodes, nps, movesleft.
+        info = chess.engine._parse_uci_info("tbhits 123 cpuload 456 hashfull 789 movesleft 42 time 987 nodes 654 nps 321", board)
         self.assertEqual(info["tbhits"], 123)
         self.assertEqual(info["cpuload"], 456)
         self.assertEqual(info["hashfull"], 789)
         self.assertEqual(info["time"], 0.987)
         self.assertEqual(info["nodes"], 654)
         self.assertEqual(info["nps"], 321)
+        self.assertEqual(info["movesleft"], 42)
 
         # Hakkapeliitta double spaces.
         info = chess.engine._parse_uci_info("depth 10 seldepth 9 score cp 22  time 17 nodes 48299 nps 2683000 tbhits 0", board)

From 518d662e5467c13630cfe98f9b99e720775d80b1 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 9 Nov 2024 13:20:59 +0100
Subject: [PATCH 578/613] Accept a1a1 as UCI null move (used by lc0, closes
 #1119)

---
 chess/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 4f5791f7c..fdd52ed07 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -705,7 +705,7 @@ def from_uci(cls, uci: str) -> Move:
                 promotion = PIECE_SYMBOLS.index(uci[4]) if len(uci) == 5 else None
             except ValueError:
                 raise InvalidMoveError(f"invalid uci: {uci!r}")
-            if from_square == to_square:
+            if from_square == to_square and from_square != A1:
                 raise InvalidMoveError(f"invalid uci (use 0000 for null moves): {uci!r}")
             return cls(from_square, to_square, promotion=promotion)
         else:

From 78c765b4dd1741df3a569c3cd96a079d06298823 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 20 Dec 2024 20:25:50 +0100
Subject: [PATCH 579/613] Simplify portable os.O_BINARY access

---
 chess/polyglot.py | 2 +-
 chess/syzygy.py   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/polyglot.py b/chess/polyglot.py
index 44a68caa5..a7d6807c4 100644
--- a/chess/polyglot.py
+++ b/chess/polyglot.py
@@ -324,7 +324,7 @@ class MemoryMappedReader:
     """Maps a Polyglot opening book to memory."""
 
     def __init__(self, filename: StrOrBytesPath) -> None:
-        fd = os.open(filename, os.O_RDONLY | os.O_BINARY if hasattr(os, "O_BINARY") else os.O_RDONLY)
+        fd = os.open(filename, os.O_RDONLY | getattr(os, "O_BINARY", 0))
         try:
             self.mmap: Union[mmap.mmap, _EmptyMmap] = mmap.mmap(fd, 0, access=mmap.ACCESS_READ)
         except (ValueError, OSError):
diff --git a/chess/syzygy.py b/chess/syzygy.py
index 89f8c2596..5ead9922c 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -587,7 +587,7 @@ def __init__(self, path: str, *, variant: Type[chess.Board] = chess.Board) -> No
 
     def init_mmap(self) -> None:
         if self.data is None:
-            fd = os.open(self.path, os.O_RDONLY | os.O_BINARY if hasattr(os, "O_BINARY") else os.O_RDONLY)
+            fd = os.open(self.path, os.O_RDONLY | getattr(os, "O_BINARY", 0))
             try:
                 data = mmap.mmap(fd, 0, access=mmap.ACCESS_READ)
             finally:

From ea87e07a22e65bc3b541f2beaefd83e4477d20d1 Mon Sep 17 00:00:00 2001
From: Manan 
Date: Tue, 31 Dec 2024 18:09:35 +0530
Subject: [PATCH 580/613] Update __init__.py

Removed redundant `Generic` import from `chess/__init__.py`
---
 chess/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index b01a2e478..8d0a68258 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -22,7 +22,7 @@
 import itertools
 import typing
 
-from typing import ClassVar, Callable, Counter, Dict, Generic, Hashable, Iterable, Iterator, List, Literal, Mapping, Optional, SupportsInt, Tuple, Type, TypeVar, Union
+from typing import ClassVar, Callable, Counter, Dict, Hashable, Iterable, Iterator, List, Literal, Mapping, Optional, SupportsInt, Tuple, Type, TypeVar, Union
 
 if typing.TYPE_CHECKING:
     from typing_extensions import Self, TypeAlias

From 5f76cb296a10a81672cbf60368a62e2c85adedec Mon Sep 17 00:00:00 2001
From: Adrien Barbaresi 
Date: Sun, 5 Jan 2025 17:42:33 +0100
Subject: [PATCH 581/613] gaviota.py: simplify and improve code

---
 chess/gaviota.py | 553 +++++++++++++++--------------------------------
 1 file changed, 179 insertions(+), 374 deletions(-)

diff --git a/chess/gaviota.py b/chess/gaviota.py
index 39173b593..8cfd40d1e 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -11,11 +11,12 @@
 import struct
 import typing
 
-import chess
-
+from itertools import accumulate
 from types import TracebackType
 from typing import BinaryIO, Callable, Dict, List, Optional, Tuple, Type, Union
 
+import chess
+
 
 LOGGER = logging.getLogger(__name__)
 
@@ -109,30 +110,19 @@ def idx_is_empty(x: int) -> int:
 
 def flip_type(x: chess.Square, y: chess.Square) -> int:
     ret = 0
+    file_x, rank_x = chess.square_file(x), chess.square_rank(x)
+    file_y, rank_y = chess.square_file(y), chess.square_rank(y)
 
-    if chess.square_file(x) > 3:
-        x = flip_we(x)
-        y = flip_we(y)
+    if file_x > 3:
+        x, y = flip_we(x), flip_we(y)
         ret |= 1
 
-    if chess.square_rank(x) > 3:
-        x = flip_ns(x)
-        y = flip_ns(y)
+    if rank_x > 3:
+        x, y = flip_ns(x), flip_ns(y)
         ret |= 2
 
-    rowx = chess.square_rank(x)
-    colx = chess.square_file(x)
-
-    if rowx > colx:
-        x = flip_nw_se(x)
-        y = flip_nw_se(y)
-        ret |= 4
-
-    rowy = chess.square_rank(y)
-    coly = chess.square_file(y)
-    if rowx == colx and rowy > coly:
-        x = flip_nw_se(x)
-        y = flip_nw_se(y)
+    if (rank_x, file_x) > (rank_y, file_y):
+        x, y = flip_nw_se(x), flip_nw_se(y)
         ret |= 4
 
     return ret
@@ -145,7 +135,6 @@ def init_flipt() -> List[List[int]]:
 
 def init_pp48_idx() -> Tuple[List[List[int]], List[int], List[int]]:
     MAX_I = MAX_J = 48
-    idx = 0
     pp48_idx = [[-1] * MAX_J for _ in range(MAX_I)]
     pp48_sq_x = [NOSQUARE] * MAX_PP48_INDEX
     pp48_sq_y = [NOSQUARE] * MAX_PP48_INDEX
@@ -157,10 +146,8 @@ def init_pp48_idx() -> Tuple[List[List[int]], List[int], List[int]]:
             j = flip_we(flip_ns(b)) - 8
 
             if idx_is_empty(pp48_idx[i][j]):
-                pp48_idx[i][j] = idx
-                pp48_idx[j][i] = idx
-                pp48_sq_x[idx] = i
-                pp48_sq_y[idx] = j
+                pp48_idx[i][j] = pp48_idx[j][i] = idx
+                pp48_sq_x[idx], pp48_sq_y[idx] = i, j
                 idx += 1
 
     return pp48_idx, pp48_sq_x, pp48_sq_y
@@ -179,26 +166,15 @@ def init_ppp48_idx() -> Tuple[List[List[List[int]]], List[int], List[int], List[
     for x in range(48):
         for y in range(x + 1, 48):
             for z in range(y + 1, 48):
-                a = ITOSQ[x]
-                b = ITOSQ[y]
-                c = ITOSQ[z]
-                if not in_queenside(b) or not in_queenside(c):
+                if not (in_queenside(ITOSQ[y]) and in_queenside(ITOSQ[z])):
                     continue
 
-                i = a - 8
-                j = b - 8
-                k = c - 8
+                i, j, k = ITOSQ[x] - 8, ITOSQ[y] - 8, ITOSQ[z] - 8
 
                 if idx_is_empty(ppp48_idx[i][j][k]):
-                    ppp48_idx[i][j][k] = idx
-                    ppp48_idx[i][k][j] = idx
-                    ppp48_idx[j][i][k] = idx
-                    ppp48_idx[j][k][i] = idx
-                    ppp48_idx[k][i][j] = idx
-                    ppp48_idx[k][j][i] = idx
-                    ppp48_sq_x[idx] = i
-                    ppp48_sq_y[idx] = j
-                    ppp48_sq_z[idx] = k
+                    for p in [(i, j, k), (i, k, j), (j, i, k), (j, k, i), (k, i, j), (k, j, i)]:
+                        ppp48_idx[p[0]][p[1]][p[2]] = idx
+                    ppp48_sq_x[idx], ppp48_sq_y[idx], ppp48_sq_z[idx] = i, j, k
                     idx += 1
 
     return ppp48_idx, ppp48_sq_x, ppp48_sq_y, ppp48_sq_z
@@ -216,8 +192,7 @@ def init_aaidx() -> Tuple[List[int], List[List[int]]]:
 
             if idx_is_empty(aaidx[x][y]):
                 # Still empty.
-                aaidx[x][y] = idx
-                aaidx[y][x] = idx
+                aaidx[x][y] = aaidx[y][x] = idx
                 aabase[idx] = x
                 idx += 1
 
@@ -229,24 +204,10 @@ def init_aaidx() -> Tuple[List[int], List[List[int]]]:
 def init_aaa() -> Tuple[List[int], List[List[int]]]:
     # Get aaa_base.
     comb = [a * (a - 1) // 2 for a in range(64)]
-
-    accum = 0
-    aaa_base = [0] * 64
-    for a in range(64 - 1):
-        accum += comb[a]
-        aaa_base[a + 1] = accum
+    aaa_base = list(accumulate(comb))
 
     # Get aaa_xyz.
-    aaa_xyz = [[-1] * 3 for _ in range(MAX_AAAINDEX)]
-
-    idx = 0
-    for z in range(64):
-        for y in range(z):
-            for x in range(y):
-                aaa_xyz[idx][0] = x
-                aaa_xyz[idx][1] = y
-                aaa_xyz[idx][2] = z
-                idx += 1
+    aaa_xyz = [[x, y, z] for z in range(64) for y in range(z) for x in range(y)]
 
     return aaa_base, aaa_xyz
 
@@ -351,34 +312,33 @@ def init_ppidx() -> Tuple[List[List[int]], List[int], List[int]]:
 
 
 def norm_kkindex(x: chess.Square, y: chess.Square) -> Tuple[int, int]:
-    if chess.square_file(x) > 3:
-        x = flip_we(x)
-        y = flip_we(y)
+    file_x, rank_x = chess.square_file(x), chess.square_rank(x)
+
+    if file_x > 3:
+        x, y = flip_we(x), flip_we(y)
 
-    if chess.square_rank(x) > 3:
-        x = flip_ns(x)
-        y = flip_ns(y)
+    if rank_x > 3:
+        x, y = flip_ns(x), flip_ns(y)
 
     rowx = chess.square_rank(x)
     colx = chess.square_file(x)
 
     if rowx > colx:
-        x = flip_nw_se(x)
-        y = flip_nw_se(y)
+        x, y = flip_nw_se(x), flip_nw_se(y)
 
     rowy = chess.square_rank(y)
     coly = chess.square_file(y)
 
     if rowx == colx and rowy > coly:
-        x = flip_nw_se(x)
-        y = flip_nw_se(y)
+        x, y = flip_nw_se(x), flip_nw_se(y)
 
     return x, y
 
+
 def init_kkidx() -> Tuple[List[List[int]], List[int], List[int]]:
     kkidx = [[-1] * 64 for _ in range(64)]
-    bksq = [-1] * MAX_KKINDEX
-    wksq = [-1] * MAX_KKINDEX
+    bksq, wksq = [-1] * MAX_KKINDEX, [-1] * MAX_KKINDEX
+
     idx = 0
     for x in range(64):
         for y in range(64):
@@ -388,10 +348,8 @@ def init_kkidx() -> Tuple[List[List[int]], List[int], List[int]]:
                 i, j = norm_kkindex(x, y)
 
                 if idx_is_empty(kkidx[i][j]):
-                    kkidx[i][j] = idx
-                    kkidx[x][y] = idx
-                    bksq[idx] = i
-                    wksq[idx] = j
+                    kkidx[i][j] = kkidx[x][y] = idx
+                    bksq[idx], wksq[idx] = i, j
                     idx += 1
 
     return kkidx, wksq, bksq
@@ -404,20 +362,12 @@ def kxk_pctoindex(c: Request) -> int:
 
     ft = flip_type(c.black_piece_squares[0], c.white_piece_squares[0])
 
-    ws = c.white_piece_squares
-    bs = c.black_piece_squares
-
-    if (ft & 1) != 0:
-        ws = [flip_we(b) for b in ws]
-        bs = [flip_we(b) for b in bs]
-
-    if (ft & 2) != 0:
-        ws = [flip_ns(b) for b in ws]
-        bs = [flip_ns(b) for b in bs]
+    ws, bs = c.white_piece_squares, c.black_piece_squares
 
-    if (ft & 4) != 0:
-        ws = [flip_nw_se(b) for b in ws]
-        bs = [flip_nw_se(b) for b in bs]
+    for f, flip in [(1, flip_we), (2, flip_ns), (4, flip_nw_se)]:
+        if ft & f:
+            ws = [flip(b) for b in ws]
+            bs = [flip(b) for b in bs]
 
     ki = KKIDX[bs[0]][ws[0]]  # KKIDX[black king][white king]
 
@@ -426,6 +376,14 @@ def kxk_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ws[1]
 
+
+def flip_we_col(*pieces: int) -> tuple[int, ...]:
+    if (pieces[0] & 7) > 3:
+        # Column is more than 3, i.e., e, f, g or h.
+        pieces = tuple(flip_we(piece) for piece in pieces)
+    return pieces
+
+
 def kapkb_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64 * 64 * 64
     BLOCK_B = 64 * 64 * 64
@@ -438,24 +396,17 @@ def kapkb_pctoindex(c: Request) -> int:
     bk = c.black_piece_squares[0]
     ba = c.black_piece_squares[1]
 
-    if not (chess.A2 <= pawn < chess.A8):
+    if not chess.A2 <= pawn < chess.A8:
         return NOINDEX
 
-    if (pawn & 7) > 3:
-        # Column is more than 3, i.e., e, f, g or h.
-        pawn = flip_we(pawn)
-        wk = flip_we(wk)
-        bk = flip_we(bk)
-        wa = flip_we(wa)
-        ba = flip_we(ba)
+    pawn, wk, bk, wa, ba = flip_we_col(pawn, wk, bk, wa, ba)
 
-    sq = pawn
-    sq ^= 56  # flip_ns
-    sq -= 8   # Down one row
-    pslice = (sq + (sq & 3)) >> 1
+    # flip_ns, down one row
+    pslice = ((pawn ^ 56) - 8 + (pawn & 3)) >> 1
 
     return pslice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + wa * BLOCK_D + ba
 
+
 def kabpk_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64 * 64 * 64
     BLOCK_B = 64 * 64 * 64
@@ -468,18 +419,13 @@ def kabpk_pctoindex(c: Request) -> int:
     pawn = c.white_piece_squares[3]
     bk = c.black_piece_squares[0]
 
-    if (pawn & 7) > 3:
-        # Column is more than 3, i.e., e, f, g or h.
-        pawn = flip_we(pawn)
-        wk = flip_we(wk)
-        bk = flip_we(bk)
-        wa = flip_we(wa)
-        wb = flip_we(wb)
+    pawn, wk, bk, wa, ba = flip_we_col(pawn, wk, bk, wa, ba)
 
     pslice = wsq_to_pidx24(pawn)
 
     return pslice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + wa * BLOCK_D + wb
 
+
 def kabkp_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64 * 64 * 64
     BLOCK_B = 64 * 64 * 64
@@ -492,23 +438,17 @@ def kabkp_pctoindex(c: Request) -> int:
     bk = c.black_piece_squares[0]
     wb = c.white_piece_squares[2]
 
-    if not (chess.A2 <= pawn < chess.A8):
+    if not chess.A2 <= pawn < chess.A8:
         return NOINDEX
 
-    if (pawn & 7) > 3:
-        # Column is more than 3, i.e., e, f, g or h.
-        pawn = flip_we(pawn)
-        wk = flip_we(wk)
-        bk = flip_we(bk)
-        wa = flip_we(wa)
-        wb = flip_we(wb)
+    pawn, wk, bk, wa, ba = flip_we_col(pawn, wk, bk, wa, ba)
 
-    sq = pawn
-    sq -= 8  # Down one row
-    pslice = (sq + (sq & 3)) >> 1
+    # Down one row
+    pslice = ((pawn - 8) + (pawn & 3)) >> 1
 
     return pslice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + wa * BLOCK_D + wb
 
+
 def kaapk_pctoindex(c: Request) -> int:
     BLOCK_C = MAX_AAINDEX
     BLOCK_B = 64 * BLOCK_C
@@ -520,13 +460,7 @@ def kaapk_pctoindex(c: Request) -> int:
     pawn = c.white_piece_squares[3]
     bk = c.black_piece_squares[0]
 
-    if (pawn & 7) > 3:
-        # Column is more than 3, i.e., e, f, g or h.
-        pawn = flip_we(pawn)
-        wk = flip_we(wk)
-        bk = flip_we(bk)
-        wa = flip_we(wa)
-        wa2 = flip_we(wa2)
+    pawn, wk, bk, wa, ba = flip_we_col(pawn, wk, bk, wa, ba)
 
     pslice = wsq_to_pidx24(pawn)
 
@@ -537,6 +471,7 @@ def kaapk_pctoindex(c: Request) -> int:
 
     return pslice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + aa_combo
 
+
 def kaakp_pctoindex(c: Request) -> int:
     BLOCK_C = MAX_AAINDEX
     BLOCK_B = 64 * BLOCK_C
@@ -548,13 +483,7 @@ def kaakp_pctoindex(c: Request) -> int:
     bk = c.black_piece_squares[0]
     pawn = c.black_piece_squares[1]
 
-    if (pawn & 7) > 3:
-        # Column is more than 3, i.e., e, f, g or h.
-        pawn = flip_we(pawn)
-        wk = flip_we(wk)
-        bk = flip_we(bk)
-        wa = flip_we(wa)
-        wa2 = flip_we(wa2)
+    pawn, wk, bk, wa, ba = flip_we_col(pawn, wk, bk, wa, ba)
 
     pawn = flip_ns(pawn)
     pslice = wsq_to_pidx24(pawn)
@@ -566,6 +495,7 @@ def kaakp_pctoindex(c: Request) -> int:
 
     return pslice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + aa_combo
 
+
 def kapkp_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64 * 64
     BLOCK_B = 64 * 64
@@ -573,30 +503,20 @@ def kapkp_pctoindex(c: Request) -> int:
 
     wk = c.white_piece_squares[0]
     wa = c.white_piece_squares[1]
-    pawn_a = c.white_piece_squares[2]
+    anchor = c.white_piece_squares[2]
     bk = c.black_piece_squares[0]
-    pawn_b = c.black_piece_squares[1]
-
-    anchor = pawn_a
-    loosen = pawn_b
+    loosen = c.black_piece_squares[1]
 
-    if (anchor & 7) > 3:
-        # Column is more than 3, i.e., e, f, g or h.
-        anchor = flip_we(anchor)
-        loosen = flip_we(loosen)
-        wk = flip_we(wk)
-        bk = flip_we(bk)
-        wa = flip_we(wa)
+    anchor, loosen, wk, bk, wa = flip_we_col(anchor, loosen, wk, bk, wa)
 
-    m = wsq_to_pidx24(anchor)
-    n = loosen - 8
-    pp_slice = m * 48 + n
+    pp_slice = wsq_to_pidx24(anchor) * 48 + loosen - 8
 
     if idx_is_empty(pp_slice):
         return NOINDEX
 
     return pp_slice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + wa
 
+
 def kappk_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64 * 64
     BLOCK_B = 64 * 64
@@ -610,13 +530,7 @@ def kappk_pctoindex(c: Request) -> int:
 
     anchor, loosen = pp_putanchorfirst(pawn_a, pawn_b)
 
-    if (anchor & 7) > 3:
-        # Column is more than 3, i.e., e, f, g or h.
-        anchor = flip_we(anchor)
-        loosen = flip_we(loosen)
-        wk = flip_we(wk)
-        bk = flip_we(bk)
-        wa = flip_we(wa)
+    anchor, loosen, wk, bk, wa = flip_we_col(anchor, loosen, wk, bk, wa)
 
     i = wsq_to_pidx24(anchor)
     j = wsq_to_pidx48(loosen)
@@ -628,6 +542,7 @@ def kappk_pctoindex(c: Request) -> int:
 
     return pp_slice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + wa
 
+
 def kppka_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64 * 64
     BLOCK_B = 64 * 64
@@ -641,12 +556,7 @@ def kppka_pctoindex(c: Request) -> int:
 
     anchor, loosen = pp_putanchorfirst(pawn_a, pawn_b)
 
-    if (anchor & 7) > 3:
-        anchor = flip_we(anchor)
-        loosen = flip_we(loosen)
-        wk = flip_we(wk)
-        bk = flip_we(bk)
-        ba = flip_we(ba)
+    anchor, loosen, wk, bk, wa = flip_we_col(anchor, loosen, wk, bk, wa)
 
     i = wsq_to_pidx24(anchor)
     j = wsq_to_pidx48(loosen)
@@ -658,6 +568,7 @@ def kppka_pctoindex(c: Request) -> int:
 
     return pp_slice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + ba
 
+
 def kabck_pctoindex(c: Request) -> int:
     N_WHITE = 4
     N_BLACK = 1
@@ -689,6 +600,7 @@ def kabck_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_A + ws[1] * BLOCK_B + ws[2] * BLOCK_C + ws[3]
 
+
 def kabbk_pctoindex(c: Request) -> int:
     N_WHITE = 4
     N_BLACK = 1
@@ -720,6 +632,7 @@ def kabbk_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ai * BLOCK_Bx + ws[1]
 
+
 def kaabk_pctoindex(c: Request) -> int:
     N_WHITE = 4
     N_BLACK = 1
@@ -751,45 +664,23 @@ def kaabk_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ai * BLOCK_Bx + ws[3]
 
+
 def aaa_getsubi(x: int, y: int, z: int) -> int:
-    bse = AAA_BASE[z]
-    calc_idx = x + (y - 1) * y // 2 + bse
-    return calc_idx
+    return x + (y - 1) * y // 2 + AAA_BASE[z]
+
 
 def kaaak_pctoindex(c: Request) -> int:
-    N_WHITE = 4
-    N_BLACK = 1
     BLOCK_Ax = MAX_AAAINDEX
-
-    ws = c.white_piece_squares[:N_WHITE]
-    bs = c.black_piece_squares[:N_BLACK]
-
+    ws = c.white_piece_squares[:4]
+    bs = c.black_piece_squares[:1]
     ft = FLIPT[c.black_piece_squares[0]][c.white_piece_squares[0]]
 
-    if (ft & WE_FLAG) != 0:
-        ws = [flip_we(i) for i in ws]
-        bs = [flip_we(i) for i in bs]
-
-    if (ft & NS_FLAG) != 0:
-        ws = [flip_ns(i) for i in ws]
-        bs = [flip_ns(i) for i in bs]
+    for flag, flip in [(WE_FLAG, flip_we), (NS_FLAG, flip_ns), (NW_SE_FLAG, flip_nw_se)]:
+        if ft & flag:
+            ws = [flip(i) for i in ws]
+            bs = [flip(i) for i in bs]
 
-    if (ft & NW_SE_FLAG) != 0:
-        ws = [flip_nw_se(i) for i in ws]
-        bs = [flip_nw_se(i) for i in bs]
-
-    if ws[2] < ws[1]:
-        tmp = ws[1]
-        ws[1] = ws[2]
-        ws[2] = tmp
-    if ws[3] < ws[2]:
-        tmp = ws[2]
-        ws[2] = ws[3]
-        ws[3] = tmp
-    if ws[2] < ws[1]:
-        tmp = ws[1]
-        ws[1] = ws[2]
-        ws[2] = tmp
+    ws[1:4] = sorted(ws[1:4])
 
     ki = KKIDX[bs[0]][ws[0]]
 
@@ -803,6 +694,7 @@ def kaaak_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ai
 
+
 def kppkp_pctoindex(c: Request) -> int:
     BLOCK_Ax = MAX_PP48_INDEX * 64 * 64
     BLOCK_Bx = 64 * 64
@@ -814,12 +706,7 @@ def kppkp_pctoindex(c: Request) -> int:
     bk = c.black_piece_squares[0]
     pawn_c = c.black_piece_squares[1]
 
-    if (pawn_c & 7) > 3:
-        wk = flip_we(wk)
-        pawn_a = flip_we(pawn_a)
-        pawn_b = flip_we(pawn_b)
-        bk = flip_we(bk)
-        pawn_c = flip_we(pawn_c)
+    pawn_c, wk, pawn_a, pawn_b, bk = flip_we_col(pawn_c, wk, pawn_a, pawn_b, bk)
 
     i = flip_we(flip_ns(pawn_a)) - 8
     j = flip_we(flip_ns(pawn_b)) - 8
@@ -834,28 +721,19 @@ def kppkp_pctoindex(c: Request) -> int:
 
     return k * BLOCK_Ax + pp48_slice * BLOCK_Bx + wk * BLOCK_Cx + bk
 
+
 def kaakb_pctoindex(c: Request) -> int:
-    N_WHITE = 3
-    N_BLACK = 2
     BLOCK_Bx = 64
     BLOCK_Ax = BLOCK_Bx * MAX_AAINDEX
+    ws = c.white_piece_squares[:3]
+    bs = c.black_piece_squares[:2]
 
     ft = FLIPT[c.black_piece_squares[0]][c.white_piece_squares[0]]
 
-    ws = c.white_piece_squares[:N_WHITE]
-    bs = c.black_piece_squares[:N_BLACK]
-
-    if (ft & WE_FLAG) != 0:
-        ws = [flip_we(i) for i in ws]
-        bs = [flip_we(i) for i in bs]
-
-    if (ft & NS_FLAG) != 0:
-        ws = [flip_ns(i) for i in ws]
-        bs = [flip_ns(i) for i in bs]
-
-    if (ft & NW_SE_FLAG) != 0:
-        ws = [flip_nw_se(i) for i in ws]
-        bs = [flip_nw_se(i) for i in bs]
+    for flag, flip in [(WE_FLAG, flip_we), (NS_FLAG, flip_ns), (NW_SE_FLAG, flip_nw_se)]:
+        if ft & flag:
+            ws = [flip(i) for i in ws]
+            bs = [flip(i) for i in bs]
 
     ki = KKIDX[bs[0]][ws[0]]  # KKIDX[black king][white king]
     ai = AAIDX[ws[1]][ws[2]]
@@ -865,6 +743,7 @@ def kaakb_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ai * BLOCK_Bx + bs[1]
 
+
 def kabkc_pctoindex(c: Request) -> int:
     N_WHITE = 3
     N_BLACK = 2
@@ -878,17 +757,10 @@ def kabkc_pctoindex(c: Request) -> int:
     ws = c.white_piece_squares[:N_WHITE]
     bs = c.black_piece_squares[:N_BLACK]
 
-    if (ft & WE_FLAG) != 0:
-        ws = [flip_we(i) for i in ws]
-        bs = [flip_we(i) for i in bs]
-
-    if (ft & NS_FLAG) != 0:
-        ws = [flip_ns(i) for i in ws]
-        bs = [flip_ns(i) for i in bs]
-
-    if (ft & NW_SE_FLAG) != 0:
-        ws = [flip_nw_se(i) for i in ws]
-        bs = [flip_nw_se(i) for i in bs]
+    for flag, flip in [(WE_FLAG, flip_we), (NS_FLAG, flip_ns), (NW_SE_FLAG, flip_nw_se)]:
+        if ft & flag:
+            ws = [flip(i) for i in ws]
+            bs = [flip(i) for i in bs]
 
     ki = KKIDX[bs[0]][ws[0]]  # KKIDX [black king] [white king]
 
@@ -897,23 +769,17 @@ def kabkc_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ws[1] * BLOCK_Bx + ws[2] * BLOCK_Cx + bs[1]
 
+
 def kpkp_pctoindex(c: Request) -> int:
     BLOCK_Ax = 64 * 64
     BLOCK_Bx = 64
 
     wk = c.white_piece_squares[0]
     bk = c.black_piece_squares[0]
-    pawn_a = c.white_piece_squares[1]
-    pawn_b = c.black_piece_squares[1]
+    anchor = c.white_piece_squares[1]
+    loosen = c.black_piece_squares[1]
 
-    anchor = pawn_a
-    loosen = pawn_b
-
-    if (anchor & 7) > 3:
-        anchor = flip_we(anchor)
-        loosen = flip_we(loosen)
-        wk = flip_we(wk)
-        bk = flip_we(bk)
+    anchor, loosen, wk, bk = flip_we_col(anchor, loosen, wk, bk)
 
     m = wsq_to_pidx24(anchor)
     n = loosen - 8
@@ -925,6 +791,7 @@ def kpkp_pctoindex(c: Request) -> int:
 
     return pp_slice * BLOCK_Ax + wk * BLOCK_Bx + bk
 
+
 def kppk_pctoindex(c: Request) -> int:
     BLOCK_Ax = 64 * 64
     BLOCK_Bx = 64
@@ -935,11 +802,7 @@ def kppk_pctoindex(c: Request) -> int:
 
     anchor, loosen = pp_putanchorfirst(pawn_a, pawn_b)
 
-    if (anchor & 7) > 3:
-        anchor = flip_we(anchor)
-        loosen = flip_we(loosen)
-        wk = flip_we(wk)
-        bk = flip_we(bk)
+    anchor, loosen, wk, bk = flip_we_col(anchor, loosen, wk, bk)
 
     i = wsq_to_pidx24(anchor)
     j = wsq_to_pidx48(loosen)
@@ -951,6 +814,7 @@ def kppk_pctoindex(c: Request) -> int:
 
     return pp_slice * BLOCK_Ax + wk * BLOCK_Bx + bk
 
+
 def kapk_pctoindex(c: Request) -> int:
     BLOCK_Ax = 64 * 64 * 64
     BLOCK_Bx = 64 * 64
@@ -961,22 +825,17 @@ def kapk_pctoindex(c: Request) -> int:
     wk = c.white_piece_squares[0]
     bk = c.black_piece_squares[0]
 
-    if not (chess.A2 <= pawn < chess.A8):
+    if not chess.A2 <= pawn < chess.A8:
         return NOINDEX
 
-    if (pawn & 7) > 3:
-        pawn = flip_we(pawn)
-        wk = flip_we(wk)
-        bk = flip_we(bk)
-        wa = flip_we(wa)
+    pawn, wk, bk, wa = flip_we_col(pawn, wk, bk, wa)
 
-    sq = pawn
-    sq ^= 56  # flip_ns
-    sq -= 8   # Down one row
+    sq = pawn ^ 56 - 8 # flip_ns and down one row
     pslice = ((sq + (sq & 3)) >> 1)
 
     return pslice * BLOCK_Ax + wk * BLOCK_Bx + bk * BLOCK_Cx + wa
 
+
 def kabk_pctoindex(c: Request) -> int:
     BLOCK_Ax = 64 * 64
     BLOCK_Bx = 64
@@ -986,17 +845,10 @@ def kabk_pctoindex(c: Request) -> int:
     ws = c.white_piece_squares
     bs = c.black_piece_squares
 
-    if (ft & 1) != 0:
-        ws = [flip_we(b) for b in ws]
-        bs = [flip_we(b) for b in bs]
-
-    if (ft & 2) != 0:
-        ws = [flip_ns(b) for b in ws]
-        bs = [flip_ns(b) for b in bs]
-
-    if (ft & 4) != 0:
-        ws = [flip_nw_se(b) for b in ws]
-        bs = [flip_nw_se(b) for b in bs]
+    for flag, flip in [(1, flip_we), (2, flip_ns), (4, flip_nw_se)]:
+        if ft & flag:
+            ws = [flip(b) for b in ws]
+            bs = [flip(b) for b in bs]
 
     ki = KKIDX[bs[0]][ws[0]]  # KKIDX[black king][white king]
 
@@ -1005,6 +857,7 @@ def kabk_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ws[1] * BLOCK_Bx + ws[2]
 
+
 def kakp_pctoindex(c: Request) -> int:
     BLOCK_Ax = 64 * 64 * 64
     BLOCK_Bx = 64 * 64
@@ -1015,42 +868,29 @@ def kakp_pctoindex(c: Request) -> int:
     wk = c.white_piece_squares[0]
     bk = c.black_piece_squares[0]
 
-    if not (chess.A2 <= pawn < chess.A8):
+    if not chess.A2 <= pawn < chess.A8:
         return NOINDEX
 
-    if (pawn & 7) > 3:
-        pawn = flip_we(pawn)
-        wk = flip_we(wk)
-        bk = flip_we(bk)
-        wa = flip_we(wa)
+    pawn, wk, bk, wa = flip_we_col(pawn, wk, bk, wa)
 
-    sq = pawn
-    sq -= 8  # Down one row
-    pslice = (sq + (sq & 3)) >> 1
+    # Down one row
+    pslice = ((pawn - 8) + ((pawn - 8) & 3)) >> 1
 
     return pslice * BLOCK_Ax + wk * BLOCK_Bx + bk * BLOCK_Cx + wa
 
+
 def kaak_pctoindex(c: Request) -> int:
-    N_WHITE = 3
-    N_BLACK = 1
     BLOCK_Ax = MAX_AAINDEX
 
     ft = FLIPT[c.black_piece_squares[0]][c.white_piece_squares[0]]
 
-    ws = c.white_piece_squares[:N_WHITE]
-    bs = c.black_piece_squares[:N_BLACK]
-
-    if (ft & WE_FLAG) != 0:
-        ws = [flip_we(i) for i in ws]
-        bs = [flip_we(i) for i in bs]
+    ws = c.white_piece_squares[:3]
+    bs = c.black_piece_squares[:1]
 
-    if (ft & NS_FLAG) != 0:
-        ws = [flip_ns(i) for i in ws]
-        bs = [flip_ns(i) for i in bs]
-
-    if (ft & NW_SE_FLAG) != 0:
-        ws = [flip_nw_se(i) for i in ws]
-        bs = [flip_nw_se(i) for i in bs]
+    for flag, flip in [(WE_FLAG, flip_we), (NS_FLAG, flip_ns), (NW_SE_FLAG, flip_nw_se)]:
+        if ft & flag:
+            ws = [flip(i) for i in ws]
+            bs = [flip(i) for i in bs]
 
     ki = KKIDX[bs[0]][ws[0]]  # KKIDX[black king][white king]
     ai = AAIDX[ws[1]][ws[2]]
@@ -1060,6 +900,7 @@ def kaak_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ai
 
+
 def kakb_pctoindex(c: Request) -> int:
     BLOCK_Ax = 64 * 64
     BLOCK_Bx = 64
@@ -1069,23 +910,9 @@ def kakb_pctoindex(c: Request) -> int:
     ws = c.white_piece_squares[:]
     bs = c.black_piece_squares[:]
 
-    if (ft & 1) != 0:
-        ws[0] = flip_we(ws[0])
-        ws[1] = flip_we(ws[1])
-        bs[0] = flip_we(bs[0])
-        bs[1] = flip_we(bs[1])
-
-    if (ft & 2) != 0:
-        ws[0] = flip_ns(ws[0])
-        ws[1] = flip_ns(ws[1])
-        bs[0] = flip_ns(bs[0])
-        bs[1] = flip_ns(bs[1])
-
-    if (ft & 4) != 0:
-        ws[0] = flip_nw_se(ws[0])
-        ws[1] = flip_nw_se(ws[1])
-        bs[0] = flip_nw_se(bs[0])
-        bs[1] = flip_nw_se(bs[1])
+    for bit, flip in [(1, flip_we), (2, flip_ns), (4, flip_nw_se)]:
+        if ft & bit:
+            ws[0], ws[1], bs[0], bs[1] = flip(ws[0]), flip(ws[1]), flip(bs[0]), flip(bs[1])
 
     ki = KKIDX[bs[0]][ws[0]]  # KKIDX[black king][white king]
 
@@ -1094,6 +921,7 @@ def kakb_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ws[1] * BLOCK_Bx + bs[1]
 
+
 def kpk_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64
     BLOCK_B = 64
@@ -1102,21 +930,16 @@ def kpk_pctoindex(c: Request) -> int:
     wk = c.white_piece_squares[0]
     bk = c.black_piece_squares[0]
 
-    if not (chess.A2 <= pawn < chess.A8):
+    if not chess.A2 <= pawn < chess.A8:
         return NOINDEX
 
-    if (pawn & 7) > 3:
-        pawn = flip_we(pawn)
-        wk = flip_we(wk)
-        bk = flip_we(bk)
+    pawn, wk, bk = flip_we_col(pawn, wk, bk)
 
-    sq = pawn
-    sq ^= 56  # flip_ns
-    sq -= 8   # Down one row
+    sq = (pawn ^ 56) - 8  # flip_ns, down one row
     pslice = ((sq + (sq & 3)) >> 1)
 
-    res = pslice * BLOCK_A + wk * BLOCK_B + bk
-    return res
+    return pslice * BLOCK_A + wk * BLOCK_B + bk
+
 
 def kpppk_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64
@@ -1126,26 +949,16 @@ def kpppk_pctoindex(c: Request) -> int:
     pawn_a = c.white_piece_squares[1]
     pawn_b = c.white_piece_squares[2]
     pawn_c = c.white_piece_squares[3]
-
     bk = c.black_piece_squares[0]
 
-    i = pawn_a - 8
-    j = pawn_b - 8
-    k = pawn_c - 8
-
+    i, j, k = [x - 8 for x in (pawn_a, pawn_b, pawn_c)]
     ppp48_slice = PPP48_IDX[i][j][k]
 
     if idx_is_empty(ppp48_slice):
-        wk = flip_we(wk)
-        pawn_a = flip_we(pawn_a)
-        pawn_b = flip_we(pawn_b)
-        pawn_c = flip_we(pawn_c)
-        bk = flip_we(bk)
-
-    i = pawn_a - 8
-    j = pawn_b - 8
-    k = pawn_c - 8
+        wk, pawn_a, pawn_b, pawn_c, bk = [flip_we(x) for x in (wk, pawn_a, pawn_b, pawn_c, bk)]
 
+    # removing this doesn't impact the tests?
+    i, j, k = [x - 8 for x in (pawn_a, pawn_b, pawn_c)]
     ppp48_slice = PPP48_IDX[i][j][k]
 
     if idx_is_empty(ppp48_slice):
@@ -1330,13 +1143,15 @@ def __init__(self, maxindex: int, slice_n: int, pctoi: Callable[[Request], int])
 
 
 def sortlists(ws: List[int], wp: List[int]) -> Tuple[List[int], List[int]]:
-    z = sorted(zip(wp, ws), key=lambda x: x[0], reverse=True)
+    z = sorted(zip(wp, ws), reverse=True)
     wp2, ws2 = zip(*z)
     return list(ws2), list(wp2)
 
+
 def egtb_block_unpack(side: int, n: int, bp: bytes) -> List[int]:
     return [dtm_unpack(side, i) for i in bp[:n]]
 
+
 def split_index(i: int) -> Tuple[int, int]:
     return divmod(i, ENTRIES_PER_BLOCK)
 
@@ -1360,19 +1175,23 @@ def removepiece(ys: List[int], yp: List[int], j: int) -> None:
     del ys[j]
     del yp[j]
 
+
 def opp(side: int) -> int:
     return 1 if side == 0 else 0
 
-def adjust_up(dist: int) -> int:
-    udist = dist
-    sw = udist & INFOMASK
 
-    if sw in [iWMATE, iWMATEt, iBMATE, iBMATEt]:
-        udist += (1 << PLYSHIFT)
+def adjust_up(dist: int) -> int:
+    if (dist & INFOMASK) in [iWMATE, iWMATEt, iBMATE, iBMATEt]:
+        return dist + (1 << PLYSHIFT)
+    return dist
 
-    return udist
 
 def bestx(side: int, a: int, b: int) -> int:
+    if a == iFORBID:
+        return b
+    if b == iFORBID:
+        return a
+
     # 0 = selectfirst
     # 1 = selectlowest
     # 2 = selecthighest
@@ -1385,33 +1204,25 @@ def bestx(side: int, a: int, b: int) -> int:
         [3, 3, 3, 0],  # forbid
     ]
 
-    xorkey = [0, 3]
-
-    if a == iFORBID:
-        return b
-    if b == iFORBID:
-        return a
-
     retu = [a, a, b, b]
 
     if b < a:
-        retu[1] = b
-        retu[2] = a
+        retu[1:2] = [b, a]
 
-    key = comparison[a & 3][b & 3] ^ xorkey[side]
+    key = comparison[a & 3][b & 3] ^ [0, 3][side]  # ^ xorkey
     return retu[key]
 
+
 def unpackdist(d: int) -> Tuple[int, int]:
     return d >> PLYSHIFT, d & INFOMASK
 
-def dtm_unpack(stm: int, packed: int) -> int:
-    p = packed
 
-    if p in [iDRAW, iFORBID]:
-        return p
+def dtm_unpack(stm: int, packed: int) -> int:
+    if packed in [iDRAW, iFORBID]:
+        return packed
 
-    info = p & 3
-    store = p >> 2
+    info = packed & 3
+    store = packed >> 2
 
     if stm == 0:
         if info == iWMATE:
@@ -1587,28 +1398,23 @@ def probe_dtm(self, board: chess.Board) -> int:
             if req.realside == 1:
                 if req.is_reversed:
                     return ply
-                else:
-                    return -ply
-            else:
-                if req.is_reversed:
-                    return -ply
-                else:
-                    return ply
-        elif res == iBMATE:
+                return -ply
+            if req.is_reversed:
+                return -ply
+            return ply
+
+        if res == iBMATE:
             # Black mates in the stored position.
             if req.realside == 0:
                 if req.is_reversed:
                     return ply
-                else:
-                    return -ply
-            else:
-                if req.is_reversed:
-                    return -ply
-                else:
-                    return ply
-        else:
-            # Draw.
-            return 0
+                return -ply
+            if req.is_reversed:
+                return -ply
+            return ply
+
+        # Draw.
+        return 0
 
     def get_dtm(self, board: chess.Board, default: Optional[int] = None) -> Optional[int]:
         try:
@@ -1644,12 +1450,12 @@ def probe_wdl(self, board: chess.Board) -> int:
         if dtm == 0:
             if board.is_checkmate():
                 return -1
-            else:
-                return 0
-        elif dtm > 0:
+            return 0
+
+        if dtm > 0:
             return 1
-        else:
-            return -1
+
+        return -1
 
     def get_wdl(self, board: chess.Board, default: Optional[int] = None) -> Optional[int]:
         try:
@@ -1795,8 +1601,7 @@ def egtb_block_getsize(self, req: Request, idx: int) -> int:
 
         if (offset + blocksz) > maxindex:
             return maxindex - offset  # Last block size
-        else:
-            return blocksz  # Size of a normal block
+        return blocksz  # Size of a normal block
 
     def _tb_probe(self, req: Request) -> int:
         stream = self._setup_tablebase(req)

From 4849537943da0cf3aa839770af2fa9f4c1432424 Mon Sep 17 00:00:00 2001
From: Adrien Barbaresi 
Date: Sun, 5 Jan 2025 17:49:53 +0100
Subject: [PATCH 582/613] fix mypy errors

---
 chess/gaviota.py | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/chess/gaviota.py b/chess/gaviota.py
index 8cfd40d1e..9abe11bcb 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -419,7 +419,7 @@ def kabpk_pctoindex(c: Request) -> int:
     pawn = c.white_piece_squares[3]
     bk = c.black_piece_squares[0]
 
-    pawn, wk, bk, wa, ba = flip_we_col(pawn, wk, bk, wa, ba)
+    pawn, wk, bk, wa, wb = flip_we_col(pawn, wk, bk, wa, wb)
 
     pslice = wsq_to_pidx24(pawn)
 
@@ -441,7 +441,7 @@ def kabkp_pctoindex(c: Request) -> int:
     if not chess.A2 <= pawn < chess.A8:
         return NOINDEX
 
-    pawn, wk, bk, wa, ba = flip_we_col(pawn, wk, bk, wa, ba)
+    pawn, wk, bk, wa, wb = flip_we_col(pawn, wk, bk, wa, wb)
 
     # Down one row
     pslice = ((pawn - 8) + (pawn & 3)) >> 1
@@ -460,7 +460,7 @@ def kaapk_pctoindex(c: Request) -> int:
     pawn = c.white_piece_squares[3]
     bk = c.black_piece_squares[0]
 
-    pawn, wk, bk, wa, ba = flip_we_col(pawn, wk, bk, wa, ba)
+    pawn, wk, bk, wa, wa2 = flip_we_col(pawn, wk, bk, wa, wa2)
 
     pslice = wsq_to_pidx24(pawn)
 
@@ -483,7 +483,7 @@ def kaakp_pctoindex(c: Request) -> int:
     bk = c.black_piece_squares[0]
     pawn = c.black_piece_squares[1]
 
-    pawn, wk, bk, wa, ba = flip_we_col(pawn, wk, bk, wa, ba)
+    pawn, wk, bk, wa, wa2 = flip_we_col(pawn, wk, bk, wa, wa2)
 
     pawn = flip_ns(pawn)
     pslice = wsq_to_pidx24(pawn)
@@ -556,7 +556,7 @@ def kppka_pctoindex(c: Request) -> int:
 
     anchor, loosen = pp_putanchorfirst(pawn_a, pawn_b)
 
-    anchor, loosen, wk, bk, wa = flip_we_col(anchor, loosen, wk, bk, wa)
+    anchor, loosen, wk, bk, ba = flip_we_col(anchor, loosen, wk, bk, ba)
 
     i = wsq_to_pidx24(anchor)
     j = wsq_to_pidx48(loosen)

From 08b6647d6fd5b6a512bbc9e1ab50222073f697bc Mon Sep 17 00:00:00 2001
From: Adrien Barbaresi 
Date: Mon, 6 Jan 2025 13:59:45 +0100
Subject: [PATCH 583/613] add permutations

---
 chess/gaviota.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/chess/gaviota.py b/chess/gaviota.py
index 9abe11bcb..a3372f04e 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -11,7 +11,7 @@
 import struct
 import typing
 
-from itertools import accumulate
+from itertools import accumulate, permutations
 from types import TracebackType
 from typing import BinaryIO, Callable, Dict, List, Optional, Tuple, Type, Union
 
@@ -172,8 +172,8 @@ def init_ppp48_idx() -> Tuple[List[List[List[int]]], List[int], List[int], List[
                 i, j, k = ITOSQ[x] - 8, ITOSQ[y] - 8, ITOSQ[z] - 8
 
                 if idx_is_empty(ppp48_idx[i][j][k]):
-                    for p in [(i, j, k), (i, k, j), (j, i, k), (j, k, i), (k, i, j), (k, j, i)]:
-                        ppp48_idx[p[0]][p[1]][p[2]] = idx
+                    for ii, jj, kk in permutations((i, j, k)):
+                        ppp48_idx[ii][jj][kk] = idx
                     ppp48_sq_x[idx], ppp48_sq_y[idx], ppp48_sq_z[idx] = i, j, k
                     idx += 1
 

From bbf2a05e6b6e3a83651b4333584940bc652cdea2 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Wed, 8 Jan 2025 20:30:04 +0100
Subject: [PATCH 584/613] Update source of Gaviota tables

---
 data/gaviota/SOURCE.txt      | 290 +++++++++++++++++------------------
 data/gaviota/TEST-SOURCE.txt |  94 ++++++------
 2 files changed, 192 insertions(+), 192 deletions(-)

diff --git a/data/gaviota/SOURCE.txt b/data/gaviota/SOURCE.txt
index dda9c83c7..706756322 100644
--- a/data/gaviota/SOURCE.txt
+++ b/data/gaviota/SOURCE.txt
@@ -1,145 +1,145 @@
-https://syzygy-tables.info/gaviota/kbk.gtb.cp4
-https://syzygy-tables.info/gaviota/knk.gtb.cp4
-https://syzygy-tables.info/gaviota/kpk.gtb.cp4
-https://syzygy-tables.info/gaviota/kqk.gtb.cp4
-https://syzygy-tables.info/gaviota/krk.gtb.cp4
-https://syzygy-tables.info/gaviota/kbbk.gtb.cp4
-https://syzygy-tables.info/gaviota/kbkb.gtb.cp4
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+https://tablebase.lichess.ovh/tables/standard/Gaviota/krrpk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krrrk.gtb.cp4
diff --git a/data/gaviota/TEST-SOURCE.txt b/data/gaviota/TEST-SOURCE.txt
index f7d29a546..36c83d39a 100644
--- a/data/gaviota/TEST-SOURCE.txt
+++ b/data/gaviota/TEST-SOURCE.txt
@@ -1,47 +1,47 @@
-https://syzygy-tables.info/gaviota/kbbk.gtb.cp4
-https://syzygy-tables.info/gaviota/kbkb.gtb.cp4
-https://syzygy-tables.info/gaviota/kbkn.gtb.cp4
-https://syzygy-tables.info/gaviota/kbkp.gtb.cp4
-https://syzygy-tables.info/gaviota/kbnk.gtb.cp4
-https://syzygy-tables.info/gaviota/kbpk.gtb.cp4
-https://syzygy-tables.info/gaviota/knkn.gtb.cp4
-https://syzygy-tables.info/gaviota/knkp.gtb.cp4
-https://syzygy-tables.info/gaviota/knnk.gtb.cp4
-https://syzygy-tables.info/gaviota/knpk.gtb.cp4
-https://syzygy-tables.info/gaviota/kpkp.gtb.cp4
-https://syzygy-tables.info/gaviota/kppk.gtb.cp4
-https://syzygy-tables.info/gaviota/kqbk.gtb.cp4
-https://syzygy-tables.info/gaviota/kqkb.gtb.cp4
-https://syzygy-tables.info/gaviota/kqkn.gtb.cp4
-https://syzygy-tables.info/gaviota/kqkp.gtb.cp4
-https://syzygy-tables.info/gaviota/kqkq.gtb.cp4
-https://syzygy-tables.info/gaviota/kqkr.gtb.cp4
-https://syzygy-tables.info/gaviota/kqnk.gtb.cp4
-https://syzygy-tables.info/gaviota/kqpk.gtb.cp4
-https://syzygy-tables.info/gaviota/kqqk.gtb.cp4
-https://syzygy-tables.info/gaviota/kqrk.gtb.cp4
-https://syzygy-tables.info/gaviota/krbk.gtb.cp4
-https://syzygy-tables.info/gaviota/krkb.gtb.cp4
-https://syzygy-tables.info/gaviota/krkn.gtb.cp4
-https://syzygy-tables.info/gaviota/krkp.gtb.cp4
-https://syzygy-tables.info/gaviota/krkr.gtb.cp4
-https://syzygy-tables.info/gaviota/krnk.gtb.cp4
-https://syzygy-tables.info/gaviota/krpk.gtb.cp4
-https://syzygy-tables.info/gaviota/krrk.gtb.cp4
-https://syzygy-tables.info/gaviota/kqrnk.gtb.cp4
-https://syzygy-tables.info/gaviota/krpkn.gtb.cp4
-https://syzygy-tables.info/gaviota/kbpkp.gtb.cp4
-https://syzygy-tables.info/gaviota/krrpk.gtb.cp4
-https://syzygy-tables.info/gaviota/knppk.gtb.cp4
-https://syzygy-tables.info/gaviota/kbnkb.gtb.cp4
-https://syzygy-tables.info/gaviota/knnkn.gtb.cp4
-https://syzygy-tables.info/gaviota/krrnk.gtb.cp4
-https://syzygy-tables.info/gaviota/kqbbk.gtb.cp4
-https://syzygy-tables.info/gaviota/kppkp.gtb.cp4
-https://syzygy-tables.info/gaviota/kppkq.gtb.cp4
-https://syzygy-tables.info/gaviota/krrrk.gtb.cp4
-https://syzygy-tables.info/gaviota/krnkp.gtb.cp4
-https://syzygy-tables.info/gaviota/kpppk.gtb.cp4
-https://syzygy-tables.info/gaviota/knnkp.gtb.cp4
-https://syzygy-tables.info/gaviota/krnpk.gtb.cp4
-https://syzygy-tables.info/gaviota/knpkp.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kbbk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kbkb.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kbkn.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kbkp.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kbnk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kbpk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/knkn.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/knkp.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/knnk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/knpk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kpkp.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kppk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kqbk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kqkb.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kqkn.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kqkp.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kqkq.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kqkr.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kqnk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kqpk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kqqk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kqrk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krbk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krkb.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krkn.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krkp.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krkr.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krnk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krpk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krrk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kqrnk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krpkn.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kbpkp.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krrpk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/knppk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kbnkb.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/knnkn.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krrnk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kqbbk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kppkp.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kppkq.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krrrk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krnkp.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/kpppk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/knnkp.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/krnpk.gtb.cp4
+https://tablebase.lichess.ovh/tables/standard/Gaviota/knpkp.gtb.cp4

From 3a974697b31e39ea8ad7e115350dc190464d7a76 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 11 Jan 2025 15:50:27 +0100
Subject: [PATCH 585/613] Use import from only for types

---
 chess/gaviota.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/chess/gaviota.py b/chess/gaviota.py
index a3372f04e..0bbe41b81 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -4,6 +4,7 @@
 import ctypes.util
 import dataclasses
 import fnmatch
+import itertools
 import logging
 import lzma
 import os
@@ -11,7 +12,6 @@
 import struct
 import typing
 
-from itertools import accumulate, permutations
 from types import TracebackType
 from typing import BinaryIO, Callable, Dict, List, Optional, Tuple, Type, Union
 
@@ -172,7 +172,7 @@ def init_ppp48_idx() -> Tuple[List[List[List[int]]], List[int], List[int], List[
                 i, j, k = ITOSQ[x] - 8, ITOSQ[y] - 8, ITOSQ[z] - 8
 
                 if idx_is_empty(ppp48_idx[i][j][k]):
-                    for ii, jj, kk in permutations((i, j, k)):
+                    for ii, jj, kk in itertools.permutations((i, j, k)):
                         ppp48_idx[ii][jj][kk] = idx
                     ppp48_sq_x[idx], ppp48_sq_y[idx], ppp48_sq_z[idx] = i, j, k
                     idx += 1
@@ -204,7 +204,7 @@ def init_aaidx() -> Tuple[List[int], List[List[int]]]:
 def init_aaa() -> Tuple[List[int], List[List[int]]]:
     # Get aaa_base.
     comb = [a * (a - 1) // 2 for a in range(64)]
-    aaa_base = list(accumulate(comb))
+    aaa_base = list(itertools.accumulate(comb))
 
     # Get aaa_xyz.
     aaa_xyz = [[x, y, z] for z in range(64) for y in range(z) for x in range(y)]

From 57536b1a0787cecf0a725ac50e9ce98e65340f11 Mon Sep 17 00:00:00 2001
From: "Robert Nurnberg @ elitebook" 
Date: Mon, 20 Jan 2025 08:49:28 +0100
Subject: [PATCH 586/613] fix typo in comment

---
 chess/syzygy.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/syzygy.py b/chess/syzygy.py
index 5ead9922c..c61890550 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -1850,7 +1850,7 @@ def probe_dtz(self, board: chess.Board) -> int:
         +-----+------------------+--------------------------------------------+
 
         The return value can be off by one: a return value -n can mean a
-        losing zeroing move in in n + 1 plies and a return value +n can mean a
+        losing zeroing move in n + 1 plies and a return value +n can mean a
         winning zeroing move in n + 1 plies.
         This implies some primary tablebase lines may waste up to 1 ply.
         Rounding is never used for endgame phases where it would change the

From 636e95fbf292f322fc4ab31b8c4add51f7534362 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 23 Feb 2025 21:05:39 +0100
Subject: [PATCH 587/613] Revert simplifications of chess.gaviota from #1130

The resulting code is not equivalent, that is, when the full tablebase
is available ./test.py GaviotaTestCase fails with

    ERROR: test_dm_4 (__main__.GaviotaTestCase.test_dm_4)
    ----------------------------------------------------------------------
    Traceback (most recent call last):
      File "/home/niklas/Projekte/python-chess/./test.py", line 35, in _wrapper
        return f(self)
      File "/home/niklas/Projekte/python-chess/./test.py", line 4305, in test_dm_4
        dtm = self.tablebase.probe_dtm(board)
      File "/home/niklas/Projekte/python-chess/chess/gaviota.py", line 1393, in probe_dtm
        dtm = self.egtb_get_dtm(req)
      File "/home/niklas/Projekte/python-chess/chess/gaviota.py", line 1518, in egtb_get_dtm
        dtm = self._tb_probe(req)
      File "/home/niklas/Projekte/python-chess/chess/gaviota.py", line 1621, in _tb_probe
        buffer_zipped = stream.read(z)
    ValueError: read length must be non-negative or -1
---
 chess/gaviota.py | 553 ++++++++++++++++++++++++++++++++---------------
 1 file changed, 374 insertions(+), 179 deletions(-)

diff --git a/chess/gaviota.py b/chess/gaviota.py
index 0bbe41b81..39173b593 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -4,7 +4,6 @@
 import ctypes.util
 import dataclasses
 import fnmatch
-import itertools
 import logging
 import lzma
 import os
@@ -12,11 +11,11 @@
 import struct
 import typing
 
+import chess
+
 from types import TracebackType
 from typing import BinaryIO, Callable, Dict, List, Optional, Tuple, Type, Union
 
-import chess
-
 
 LOGGER = logging.getLogger(__name__)
 
@@ -110,19 +109,30 @@ def idx_is_empty(x: int) -> int:
 
 def flip_type(x: chess.Square, y: chess.Square) -> int:
     ret = 0
-    file_x, rank_x = chess.square_file(x), chess.square_rank(x)
-    file_y, rank_y = chess.square_file(y), chess.square_rank(y)
 
-    if file_x > 3:
-        x, y = flip_we(x), flip_we(y)
+    if chess.square_file(x) > 3:
+        x = flip_we(x)
+        y = flip_we(y)
         ret |= 1
 
-    if rank_x > 3:
-        x, y = flip_ns(x), flip_ns(y)
+    if chess.square_rank(x) > 3:
+        x = flip_ns(x)
+        y = flip_ns(y)
         ret |= 2
 
-    if (rank_x, file_x) > (rank_y, file_y):
-        x, y = flip_nw_se(x), flip_nw_se(y)
+    rowx = chess.square_rank(x)
+    colx = chess.square_file(x)
+
+    if rowx > colx:
+        x = flip_nw_se(x)
+        y = flip_nw_se(y)
+        ret |= 4
+
+    rowy = chess.square_rank(y)
+    coly = chess.square_file(y)
+    if rowx == colx and rowy > coly:
+        x = flip_nw_se(x)
+        y = flip_nw_se(y)
         ret |= 4
 
     return ret
@@ -135,6 +145,7 @@ def init_flipt() -> List[List[int]]:
 
 def init_pp48_idx() -> Tuple[List[List[int]], List[int], List[int]]:
     MAX_I = MAX_J = 48
+    idx = 0
     pp48_idx = [[-1] * MAX_J for _ in range(MAX_I)]
     pp48_sq_x = [NOSQUARE] * MAX_PP48_INDEX
     pp48_sq_y = [NOSQUARE] * MAX_PP48_INDEX
@@ -146,8 +157,10 @@ def init_pp48_idx() -> Tuple[List[List[int]], List[int], List[int]]:
             j = flip_we(flip_ns(b)) - 8
 
             if idx_is_empty(pp48_idx[i][j]):
-                pp48_idx[i][j] = pp48_idx[j][i] = idx
-                pp48_sq_x[idx], pp48_sq_y[idx] = i, j
+                pp48_idx[i][j] = idx
+                pp48_idx[j][i] = idx
+                pp48_sq_x[idx] = i
+                pp48_sq_y[idx] = j
                 idx += 1
 
     return pp48_idx, pp48_sq_x, pp48_sq_y
@@ -166,15 +179,26 @@ def init_ppp48_idx() -> Tuple[List[List[List[int]]], List[int], List[int], List[
     for x in range(48):
         for y in range(x + 1, 48):
             for z in range(y + 1, 48):
-                if not (in_queenside(ITOSQ[y]) and in_queenside(ITOSQ[z])):
+                a = ITOSQ[x]
+                b = ITOSQ[y]
+                c = ITOSQ[z]
+                if not in_queenside(b) or not in_queenside(c):
                     continue
 
-                i, j, k = ITOSQ[x] - 8, ITOSQ[y] - 8, ITOSQ[z] - 8
+                i = a - 8
+                j = b - 8
+                k = c - 8
 
                 if idx_is_empty(ppp48_idx[i][j][k]):
-                    for ii, jj, kk in itertools.permutations((i, j, k)):
-                        ppp48_idx[ii][jj][kk] = idx
-                    ppp48_sq_x[idx], ppp48_sq_y[idx], ppp48_sq_z[idx] = i, j, k
+                    ppp48_idx[i][j][k] = idx
+                    ppp48_idx[i][k][j] = idx
+                    ppp48_idx[j][i][k] = idx
+                    ppp48_idx[j][k][i] = idx
+                    ppp48_idx[k][i][j] = idx
+                    ppp48_idx[k][j][i] = idx
+                    ppp48_sq_x[idx] = i
+                    ppp48_sq_y[idx] = j
+                    ppp48_sq_z[idx] = k
                     idx += 1
 
     return ppp48_idx, ppp48_sq_x, ppp48_sq_y, ppp48_sq_z
@@ -192,7 +216,8 @@ def init_aaidx() -> Tuple[List[int], List[List[int]]]:
 
             if idx_is_empty(aaidx[x][y]):
                 # Still empty.
-                aaidx[x][y] = aaidx[y][x] = idx
+                aaidx[x][y] = idx
+                aaidx[y][x] = idx
                 aabase[idx] = x
                 idx += 1
 
@@ -204,10 +229,24 @@ def init_aaidx() -> Tuple[List[int], List[List[int]]]:
 def init_aaa() -> Tuple[List[int], List[List[int]]]:
     # Get aaa_base.
     comb = [a * (a - 1) // 2 for a in range(64)]
-    aaa_base = list(itertools.accumulate(comb))
+
+    accum = 0
+    aaa_base = [0] * 64
+    for a in range(64 - 1):
+        accum += comb[a]
+        aaa_base[a + 1] = accum
 
     # Get aaa_xyz.
-    aaa_xyz = [[x, y, z] for z in range(64) for y in range(z) for x in range(y)]
+    aaa_xyz = [[-1] * 3 for _ in range(MAX_AAAINDEX)]
+
+    idx = 0
+    for z in range(64):
+        for y in range(z):
+            for x in range(y):
+                aaa_xyz[idx][0] = x
+                aaa_xyz[idx][1] = y
+                aaa_xyz[idx][2] = z
+                idx += 1
 
     return aaa_base, aaa_xyz
 
@@ -312,33 +351,34 @@ def init_ppidx() -> Tuple[List[List[int]], List[int], List[int]]:
 
 
 def norm_kkindex(x: chess.Square, y: chess.Square) -> Tuple[int, int]:
-    file_x, rank_x = chess.square_file(x), chess.square_rank(x)
-
-    if file_x > 3:
-        x, y = flip_we(x), flip_we(y)
+    if chess.square_file(x) > 3:
+        x = flip_we(x)
+        y = flip_we(y)
 
-    if rank_x > 3:
-        x, y = flip_ns(x), flip_ns(y)
+    if chess.square_rank(x) > 3:
+        x = flip_ns(x)
+        y = flip_ns(y)
 
     rowx = chess.square_rank(x)
     colx = chess.square_file(x)
 
     if rowx > colx:
-        x, y = flip_nw_se(x), flip_nw_se(y)
+        x = flip_nw_se(x)
+        y = flip_nw_se(y)
 
     rowy = chess.square_rank(y)
     coly = chess.square_file(y)
 
     if rowx == colx and rowy > coly:
-        x, y = flip_nw_se(x), flip_nw_se(y)
+        x = flip_nw_se(x)
+        y = flip_nw_se(y)
 
     return x, y
 
-
 def init_kkidx() -> Tuple[List[List[int]], List[int], List[int]]:
     kkidx = [[-1] * 64 for _ in range(64)]
-    bksq, wksq = [-1] * MAX_KKINDEX, [-1] * MAX_KKINDEX
-
+    bksq = [-1] * MAX_KKINDEX
+    wksq = [-1] * MAX_KKINDEX
     idx = 0
     for x in range(64):
         for y in range(64):
@@ -348,8 +388,10 @@ def init_kkidx() -> Tuple[List[List[int]], List[int], List[int]]:
                 i, j = norm_kkindex(x, y)
 
                 if idx_is_empty(kkidx[i][j]):
-                    kkidx[i][j] = kkidx[x][y] = idx
-                    bksq[idx], wksq[idx] = i, j
+                    kkidx[i][j] = idx
+                    kkidx[x][y] = idx
+                    bksq[idx] = i
+                    wksq[idx] = j
                     idx += 1
 
     return kkidx, wksq, bksq
@@ -362,12 +404,20 @@ def kxk_pctoindex(c: Request) -> int:
 
     ft = flip_type(c.black_piece_squares[0], c.white_piece_squares[0])
 
-    ws, bs = c.white_piece_squares, c.black_piece_squares
+    ws = c.white_piece_squares
+    bs = c.black_piece_squares
+
+    if (ft & 1) != 0:
+        ws = [flip_we(b) for b in ws]
+        bs = [flip_we(b) for b in bs]
+
+    if (ft & 2) != 0:
+        ws = [flip_ns(b) for b in ws]
+        bs = [flip_ns(b) for b in bs]
 
-    for f, flip in [(1, flip_we), (2, flip_ns), (4, flip_nw_se)]:
-        if ft & f:
-            ws = [flip(b) for b in ws]
-            bs = [flip(b) for b in bs]
+    if (ft & 4) != 0:
+        ws = [flip_nw_se(b) for b in ws]
+        bs = [flip_nw_se(b) for b in bs]
 
     ki = KKIDX[bs[0]][ws[0]]  # KKIDX[black king][white king]
 
@@ -376,14 +426,6 @@ def kxk_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ws[1]
 
-
-def flip_we_col(*pieces: int) -> tuple[int, ...]:
-    if (pieces[0] & 7) > 3:
-        # Column is more than 3, i.e., e, f, g or h.
-        pieces = tuple(flip_we(piece) for piece in pieces)
-    return pieces
-
-
 def kapkb_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64 * 64 * 64
     BLOCK_B = 64 * 64 * 64
@@ -396,17 +438,24 @@ def kapkb_pctoindex(c: Request) -> int:
     bk = c.black_piece_squares[0]
     ba = c.black_piece_squares[1]
 
-    if not chess.A2 <= pawn < chess.A8:
+    if not (chess.A2 <= pawn < chess.A8):
         return NOINDEX
 
-    pawn, wk, bk, wa, ba = flip_we_col(pawn, wk, bk, wa, ba)
+    if (pawn & 7) > 3:
+        # Column is more than 3, i.e., e, f, g or h.
+        pawn = flip_we(pawn)
+        wk = flip_we(wk)
+        bk = flip_we(bk)
+        wa = flip_we(wa)
+        ba = flip_we(ba)
 
-    # flip_ns, down one row
-    pslice = ((pawn ^ 56) - 8 + (pawn & 3)) >> 1
+    sq = pawn
+    sq ^= 56  # flip_ns
+    sq -= 8   # Down one row
+    pslice = (sq + (sq & 3)) >> 1
 
     return pslice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + wa * BLOCK_D + ba
 
-
 def kabpk_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64 * 64 * 64
     BLOCK_B = 64 * 64 * 64
@@ -419,13 +468,18 @@ def kabpk_pctoindex(c: Request) -> int:
     pawn = c.white_piece_squares[3]
     bk = c.black_piece_squares[0]
 
-    pawn, wk, bk, wa, wb = flip_we_col(pawn, wk, bk, wa, wb)
+    if (pawn & 7) > 3:
+        # Column is more than 3, i.e., e, f, g or h.
+        pawn = flip_we(pawn)
+        wk = flip_we(wk)
+        bk = flip_we(bk)
+        wa = flip_we(wa)
+        wb = flip_we(wb)
 
     pslice = wsq_to_pidx24(pawn)
 
     return pslice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + wa * BLOCK_D + wb
 
-
 def kabkp_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64 * 64 * 64
     BLOCK_B = 64 * 64 * 64
@@ -438,17 +492,23 @@ def kabkp_pctoindex(c: Request) -> int:
     bk = c.black_piece_squares[0]
     wb = c.white_piece_squares[2]
 
-    if not chess.A2 <= pawn < chess.A8:
+    if not (chess.A2 <= pawn < chess.A8):
         return NOINDEX
 
-    pawn, wk, bk, wa, wb = flip_we_col(pawn, wk, bk, wa, wb)
+    if (pawn & 7) > 3:
+        # Column is more than 3, i.e., e, f, g or h.
+        pawn = flip_we(pawn)
+        wk = flip_we(wk)
+        bk = flip_we(bk)
+        wa = flip_we(wa)
+        wb = flip_we(wb)
 
-    # Down one row
-    pslice = ((pawn - 8) + (pawn & 3)) >> 1
+    sq = pawn
+    sq -= 8  # Down one row
+    pslice = (sq + (sq & 3)) >> 1
 
     return pslice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + wa * BLOCK_D + wb
 
-
 def kaapk_pctoindex(c: Request) -> int:
     BLOCK_C = MAX_AAINDEX
     BLOCK_B = 64 * BLOCK_C
@@ -460,7 +520,13 @@ def kaapk_pctoindex(c: Request) -> int:
     pawn = c.white_piece_squares[3]
     bk = c.black_piece_squares[0]
 
-    pawn, wk, bk, wa, wa2 = flip_we_col(pawn, wk, bk, wa, wa2)
+    if (pawn & 7) > 3:
+        # Column is more than 3, i.e., e, f, g or h.
+        pawn = flip_we(pawn)
+        wk = flip_we(wk)
+        bk = flip_we(bk)
+        wa = flip_we(wa)
+        wa2 = flip_we(wa2)
 
     pslice = wsq_to_pidx24(pawn)
 
@@ -471,7 +537,6 @@ def kaapk_pctoindex(c: Request) -> int:
 
     return pslice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + aa_combo
 
-
 def kaakp_pctoindex(c: Request) -> int:
     BLOCK_C = MAX_AAINDEX
     BLOCK_B = 64 * BLOCK_C
@@ -483,7 +548,13 @@ def kaakp_pctoindex(c: Request) -> int:
     bk = c.black_piece_squares[0]
     pawn = c.black_piece_squares[1]
 
-    pawn, wk, bk, wa, wa2 = flip_we_col(pawn, wk, bk, wa, wa2)
+    if (pawn & 7) > 3:
+        # Column is more than 3, i.e., e, f, g or h.
+        pawn = flip_we(pawn)
+        wk = flip_we(wk)
+        bk = flip_we(bk)
+        wa = flip_we(wa)
+        wa2 = flip_we(wa2)
 
     pawn = flip_ns(pawn)
     pslice = wsq_to_pidx24(pawn)
@@ -495,7 +566,6 @@ def kaakp_pctoindex(c: Request) -> int:
 
     return pslice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + aa_combo
 
-
 def kapkp_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64 * 64
     BLOCK_B = 64 * 64
@@ -503,20 +573,30 @@ def kapkp_pctoindex(c: Request) -> int:
 
     wk = c.white_piece_squares[0]
     wa = c.white_piece_squares[1]
-    anchor = c.white_piece_squares[2]
+    pawn_a = c.white_piece_squares[2]
     bk = c.black_piece_squares[0]
-    loosen = c.black_piece_squares[1]
+    pawn_b = c.black_piece_squares[1]
+
+    anchor = pawn_a
+    loosen = pawn_b
 
-    anchor, loosen, wk, bk, wa = flip_we_col(anchor, loosen, wk, bk, wa)
+    if (anchor & 7) > 3:
+        # Column is more than 3, i.e., e, f, g or h.
+        anchor = flip_we(anchor)
+        loosen = flip_we(loosen)
+        wk = flip_we(wk)
+        bk = flip_we(bk)
+        wa = flip_we(wa)
 
-    pp_slice = wsq_to_pidx24(anchor) * 48 + loosen - 8
+    m = wsq_to_pidx24(anchor)
+    n = loosen - 8
+    pp_slice = m * 48 + n
 
     if idx_is_empty(pp_slice):
         return NOINDEX
 
     return pp_slice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + wa
 
-
 def kappk_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64 * 64
     BLOCK_B = 64 * 64
@@ -530,7 +610,13 @@ def kappk_pctoindex(c: Request) -> int:
 
     anchor, loosen = pp_putanchorfirst(pawn_a, pawn_b)
 
-    anchor, loosen, wk, bk, wa = flip_we_col(anchor, loosen, wk, bk, wa)
+    if (anchor & 7) > 3:
+        # Column is more than 3, i.e., e, f, g or h.
+        anchor = flip_we(anchor)
+        loosen = flip_we(loosen)
+        wk = flip_we(wk)
+        bk = flip_we(bk)
+        wa = flip_we(wa)
 
     i = wsq_to_pidx24(anchor)
     j = wsq_to_pidx48(loosen)
@@ -542,7 +628,6 @@ def kappk_pctoindex(c: Request) -> int:
 
     return pp_slice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + wa
 
-
 def kppka_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64 * 64
     BLOCK_B = 64 * 64
@@ -556,7 +641,12 @@ def kppka_pctoindex(c: Request) -> int:
 
     anchor, loosen = pp_putanchorfirst(pawn_a, pawn_b)
 
-    anchor, loosen, wk, bk, ba = flip_we_col(anchor, loosen, wk, bk, ba)
+    if (anchor & 7) > 3:
+        anchor = flip_we(anchor)
+        loosen = flip_we(loosen)
+        wk = flip_we(wk)
+        bk = flip_we(bk)
+        ba = flip_we(ba)
 
     i = wsq_to_pidx24(anchor)
     j = wsq_to_pidx48(loosen)
@@ -568,7 +658,6 @@ def kppka_pctoindex(c: Request) -> int:
 
     return pp_slice * BLOCK_A + wk * BLOCK_B + bk * BLOCK_C + ba
 
-
 def kabck_pctoindex(c: Request) -> int:
     N_WHITE = 4
     N_BLACK = 1
@@ -600,7 +689,6 @@ def kabck_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_A + ws[1] * BLOCK_B + ws[2] * BLOCK_C + ws[3]
 
-
 def kabbk_pctoindex(c: Request) -> int:
     N_WHITE = 4
     N_BLACK = 1
@@ -632,7 +720,6 @@ def kabbk_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ai * BLOCK_Bx + ws[1]
 
-
 def kaabk_pctoindex(c: Request) -> int:
     N_WHITE = 4
     N_BLACK = 1
@@ -664,23 +751,45 @@ def kaabk_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ai * BLOCK_Bx + ws[3]
 
-
 def aaa_getsubi(x: int, y: int, z: int) -> int:
-    return x + (y - 1) * y // 2 + AAA_BASE[z]
-
+    bse = AAA_BASE[z]
+    calc_idx = x + (y - 1) * y // 2 + bse
+    return calc_idx
 
 def kaaak_pctoindex(c: Request) -> int:
+    N_WHITE = 4
+    N_BLACK = 1
     BLOCK_Ax = MAX_AAAINDEX
-    ws = c.white_piece_squares[:4]
-    bs = c.black_piece_squares[:1]
+
+    ws = c.white_piece_squares[:N_WHITE]
+    bs = c.black_piece_squares[:N_BLACK]
+
     ft = FLIPT[c.black_piece_squares[0]][c.white_piece_squares[0]]
 
-    for flag, flip in [(WE_FLAG, flip_we), (NS_FLAG, flip_ns), (NW_SE_FLAG, flip_nw_se)]:
-        if ft & flag:
-            ws = [flip(i) for i in ws]
-            bs = [flip(i) for i in bs]
+    if (ft & WE_FLAG) != 0:
+        ws = [flip_we(i) for i in ws]
+        bs = [flip_we(i) for i in bs]
+
+    if (ft & NS_FLAG) != 0:
+        ws = [flip_ns(i) for i in ws]
+        bs = [flip_ns(i) for i in bs]
 
-    ws[1:4] = sorted(ws[1:4])
+    if (ft & NW_SE_FLAG) != 0:
+        ws = [flip_nw_se(i) for i in ws]
+        bs = [flip_nw_se(i) for i in bs]
+
+    if ws[2] < ws[1]:
+        tmp = ws[1]
+        ws[1] = ws[2]
+        ws[2] = tmp
+    if ws[3] < ws[2]:
+        tmp = ws[2]
+        ws[2] = ws[3]
+        ws[3] = tmp
+    if ws[2] < ws[1]:
+        tmp = ws[1]
+        ws[1] = ws[2]
+        ws[2] = tmp
 
     ki = KKIDX[bs[0]][ws[0]]
 
@@ -694,7 +803,6 @@ def kaaak_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ai
 
-
 def kppkp_pctoindex(c: Request) -> int:
     BLOCK_Ax = MAX_PP48_INDEX * 64 * 64
     BLOCK_Bx = 64 * 64
@@ -706,7 +814,12 @@ def kppkp_pctoindex(c: Request) -> int:
     bk = c.black_piece_squares[0]
     pawn_c = c.black_piece_squares[1]
 
-    pawn_c, wk, pawn_a, pawn_b, bk = flip_we_col(pawn_c, wk, pawn_a, pawn_b, bk)
+    if (pawn_c & 7) > 3:
+        wk = flip_we(wk)
+        pawn_a = flip_we(pawn_a)
+        pawn_b = flip_we(pawn_b)
+        bk = flip_we(bk)
+        pawn_c = flip_we(pawn_c)
 
     i = flip_we(flip_ns(pawn_a)) - 8
     j = flip_we(flip_ns(pawn_b)) - 8
@@ -721,19 +834,28 @@ def kppkp_pctoindex(c: Request) -> int:
 
     return k * BLOCK_Ax + pp48_slice * BLOCK_Bx + wk * BLOCK_Cx + bk
 
-
 def kaakb_pctoindex(c: Request) -> int:
+    N_WHITE = 3
+    N_BLACK = 2
     BLOCK_Bx = 64
     BLOCK_Ax = BLOCK_Bx * MAX_AAINDEX
-    ws = c.white_piece_squares[:3]
-    bs = c.black_piece_squares[:2]
 
     ft = FLIPT[c.black_piece_squares[0]][c.white_piece_squares[0]]
 
-    for flag, flip in [(WE_FLAG, flip_we), (NS_FLAG, flip_ns), (NW_SE_FLAG, flip_nw_se)]:
-        if ft & flag:
-            ws = [flip(i) for i in ws]
-            bs = [flip(i) for i in bs]
+    ws = c.white_piece_squares[:N_WHITE]
+    bs = c.black_piece_squares[:N_BLACK]
+
+    if (ft & WE_FLAG) != 0:
+        ws = [flip_we(i) for i in ws]
+        bs = [flip_we(i) for i in bs]
+
+    if (ft & NS_FLAG) != 0:
+        ws = [flip_ns(i) for i in ws]
+        bs = [flip_ns(i) for i in bs]
+
+    if (ft & NW_SE_FLAG) != 0:
+        ws = [flip_nw_se(i) for i in ws]
+        bs = [flip_nw_se(i) for i in bs]
 
     ki = KKIDX[bs[0]][ws[0]]  # KKIDX[black king][white king]
     ai = AAIDX[ws[1]][ws[2]]
@@ -743,7 +865,6 @@ def kaakb_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ai * BLOCK_Bx + bs[1]
 
-
 def kabkc_pctoindex(c: Request) -> int:
     N_WHITE = 3
     N_BLACK = 2
@@ -757,10 +878,17 @@ def kabkc_pctoindex(c: Request) -> int:
     ws = c.white_piece_squares[:N_WHITE]
     bs = c.black_piece_squares[:N_BLACK]
 
-    for flag, flip in [(WE_FLAG, flip_we), (NS_FLAG, flip_ns), (NW_SE_FLAG, flip_nw_se)]:
-        if ft & flag:
-            ws = [flip(i) for i in ws]
-            bs = [flip(i) for i in bs]
+    if (ft & WE_FLAG) != 0:
+        ws = [flip_we(i) for i in ws]
+        bs = [flip_we(i) for i in bs]
+
+    if (ft & NS_FLAG) != 0:
+        ws = [flip_ns(i) for i in ws]
+        bs = [flip_ns(i) for i in bs]
+
+    if (ft & NW_SE_FLAG) != 0:
+        ws = [flip_nw_se(i) for i in ws]
+        bs = [flip_nw_se(i) for i in bs]
 
     ki = KKIDX[bs[0]][ws[0]]  # KKIDX [black king] [white king]
 
@@ -769,17 +897,23 @@ def kabkc_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ws[1] * BLOCK_Bx + ws[2] * BLOCK_Cx + bs[1]
 
-
 def kpkp_pctoindex(c: Request) -> int:
     BLOCK_Ax = 64 * 64
     BLOCK_Bx = 64
 
     wk = c.white_piece_squares[0]
     bk = c.black_piece_squares[0]
-    anchor = c.white_piece_squares[1]
-    loosen = c.black_piece_squares[1]
+    pawn_a = c.white_piece_squares[1]
+    pawn_b = c.black_piece_squares[1]
 
-    anchor, loosen, wk, bk = flip_we_col(anchor, loosen, wk, bk)
+    anchor = pawn_a
+    loosen = pawn_b
+
+    if (anchor & 7) > 3:
+        anchor = flip_we(anchor)
+        loosen = flip_we(loosen)
+        wk = flip_we(wk)
+        bk = flip_we(bk)
 
     m = wsq_to_pidx24(anchor)
     n = loosen - 8
@@ -791,7 +925,6 @@ def kpkp_pctoindex(c: Request) -> int:
 
     return pp_slice * BLOCK_Ax + wk * BLOCK_Bx + bk
 
-
 def kppk_pctoindex(c: Request) -> int:
     BLOCK_Ax = 64 * 64
     BLOCK_Bx = 64
@@ -802,7 +935,11 @@ def kppk_pctoindex(c: Request) -> int:
 
     anchor, loosen = pp_putanchorfirst(pawn_a, pawn_b)
 
-    anchor, loosen, wk, bk = flip_we_col(anchor, loosen, wk, bk)
+    if (anchor & 7) > 3:
+        anchor = flip_we(anchor)
+        loosen = flip_we(loosen)
+        wk = flip_we(wk)
+        bk = flip_we(bk)
 
     i = wsq_to_pidx24(anchor)
     j = wsq_to_pidx48(loosen)
@@ -814,7 +951,6 @@ def kppk_pctoindex(c: Request) -> int:
 
     return pp_slice * BLOCK_Ax + wk * BLOCK_Bx + bk
 
-
 def kapk_pctoindex(c: Request) -> int:
     BLOCK_Ax = 64 * 64 * 64
     BLOCK_Bx = 64 * 64
@@ -825,17 +961,22 @@ def kapk_pctoindex(c: Request) -> int:
     wk = c.white_piece_squares[0]
     bk = c.black_piece_squares[0]
 
-    if not chess.A2 <= pawn < chess.A8:
+    if not (chess.A2 <= pawn < chess.A8):
         return NOINDEX
 
-    pawn, wk, bk, wa = flip_we_col(pawn, wk, bk, wa)
+    if (pawn & 7) > 3:
+        pawn = flip_we(pawn)
+        wk = flip_we(wk)
+        bk = flip_we(bk)
+        wa = flip_we(wa)
 
-    sq = pawn ^ 56 - 8 # flip_ns and down one row
+    sq = pawn
+    sq ^= 56  # flip_ns
+    sq -= 8   # Down one row
     pslice = ((sq + (sq & 3)) >> 1)
 
     return pslice * BLOCK_Ax + wk * BLOCK_Bx + bk * BLOCK_Cx + wa
 
-
 def kabk_pctoindex(c: Request) -> int:
     BLOCK_Ax = 64 * 64
     BLOCK_Bx = 64
@@ -845,10 +986,17 @@ def kabk_pctoindex(c: Request) -> int:
     ws = c.white_piece_squares
     bs = c.black_piece_squares
 
-    for flag, flip in [(1, flip_we), (2, flip_ns), (4, flip_nw_se)]:
-        if ft & flag:
-            ws = [flip(b) for b in ws]
-            bs = [flip(b) for b in bs]
+    if (ft & 1) != 0:
+        ws = [flip_we(b) for b in ws]
+        bs = [flip_we(b) for b in bs]
+
+    if (ft & 2) != 0:
+        ws = [flip_ns(b) for b in ws]
+        bs = [flip_ns(b) for b in bs]
+
+    if (ft & 4) != 0:
+        ws = [flip_nw_se(b) for b in ws]
+        bs = [flip_nw_se(b) for b in bs]
 
     ki = KKIDX[bs[0]][ws[0]]  # KKIDX[black king][white king]
 
@@ -857,7 +1005,6 @@ def kabk_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ws[1] * BLOCK_Bx + ws[2]
 
-
 def kakp_pctoindex(c: Request) -> int:
     BLOCK_Ax = 64 * 64 * 64
     BLOCK_Bx = 64 * 64
@@ -868,29 +1015,42 @@ def kakp_pctoindex(c: Request) -> int:
     wk = c.white_piece_squares[0]
     bk = c.black_piece_squares[0]
 
-    if not chess.A2 <= pawn < chess.A8:
+    if not (chess.A2 <= pawn < chess.A8):
         return NOINDEX
 
-    pawn, wk, bk, wa = flip_we_col(pawn, wk, bk, wa)
+    if (pawn & 7) > 3:
+        pawn = flip_we(pawn)
+        wk = flip_we(wk)
+        bk = flip_we(bk)
+        wa = flip_we(wa)
 
-    # Down one row
-    pslice = ((pawn - 8) + ((pawn - 8) & 3)) >> 1
+    sq = pawn
+    sq -= 8  # Down one row
+    pslice = (sq + (sq & 3)) >> 1
 
     return pslice * BLOCK_Ax + wk * BLOCK_Bx + bk * BLOCK_Cx + wa
 
-
 def kaak_pctoindex(c: Request) -> int:
+    N_WHITE = 3
+    N_BLACK = 1
     BLOCK_Ax = MAX_AAINDEX
 
     ft = FLIPT[c.black_piece_squares[0]][c.white_piece_squares[0]]
 
-    ws = c.white_piece_squares[:3]
-    bs = c.black_piece_squares[:1]
+    ws = c.white_piece_squares[:N_WHITE]
+    bs = c.black_piece_squares[:N_BLACK]
+
+    if (ft & WE_FLAG) != 0:
+        ws = [flip_we(i) for i in ws]
+        bs = [flip_we(i) for i in bs]
 
-    for flag, flip in [(WE_FLAG, flip_we), (NS_FLAG, flip_ns), (NW_SE_FLAG, flip_nw_se)]:
-        if ft & flag:
-            ws = [flip(i) for i in ws]
-            bs = [flip(i) for i in bs]
+    if (ft & NS_FLAG) != 0:
+        ws = [flip_ns(i) for i in ws]
+        bs = [flip_ns(i) for i in bs]
+
+    if (ft & NW_SE_FLAG) != 0:
+        ws = [flip_nw_se(i) for i in ws]
+        bs = [flip_nw_se(i) for i in bs]
 
     ki = KKIDX[bs[0]][ws[0]]  # KKIDX[black king][white king]
     ai = AAIDX[ws[1]][ws[2]]
@@ -900,7 +1060,6 @@ def kaak_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ai
 
-
 def kakb_pctoindex(c: Request) -> int:
     BLOCK_Ax = 64 * 64
     BLOCK_Bx = 64
@@ -910,9 +1069,23 @@ def kakb_pctoindex(c: Request) -> int:
     ws = c.white_piece_squares[:]
     bs = c.black_piece_squares[:]
 
-    for bit, flip in [(1, flip_we), (2, flip_ns), (4, flip_nw_se)]:
-        if ft & bit:
-            ws[0], ws[1], bs[0], bs[1] = flip(ws[0]), flip(ws[1]), flip(bs[0]), flip(bs[1])
+    if (ft & 1) != 0:
+        ws[0] = flip_we(ws[0])
+        ws[1] = flip_we(ws[1])
+        bs[0] = flip_we(bs[0])
+        bs[1] = flip_we(bs[1])
+
+    if (ft & 2) != 0:
+        ws[0] = flip_ns(ws[0])
+        ws[1] = flip_ns(ws[1])
+        bs[0] = flip_ns(bs[0])
+        bs[1] = flip_ns(bs[1])
+
+    if (ft & 4) != 0:
+        ws[0] = flip_nw_se(ws[0])
+        ws[1] = flip_nw_se(ws[1])
+        bs[0] = flip_nw_se(bs[0])
+        bs[1] = flip_nw_se(bs[1])
 
     ki = KKIDX[bs[0]][ws[0]]  # KKIDX[black king][white king]
 
@@ -921,7 +1094,6 @@ def kakb_pctoindex(c: Request) -> int:
 
     return ki * BLOCK_Ax + ws[1] * BLOCK_Bx + bs[1]
 
-
 def kpk_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64
     BLOCK_B = 64
@@ -930,16 +1102,21 @@ def kpk_pctoindex(c: Request) -> int:
     wk = c.white_piece_squares[0]
     bk = c.black_piece_squares[0]
 
-    if not chess.A2 <= pawn < chess.A8:
+    if not (chess.A2 <= pawn < chess.A8):
         return NOINDEX
 
-    pawn, wk, bk = flip_we_col(pawn, wk, bk)
+    if (pawn & 7) > 3:
+        pawn = flip_we(pawn)
+        wk = flip_we(wk)
+        bk = flip_we(bk)
 
-    sq = (pawn ^ 56) - 8  # flip_ns, down one row
+    sq = pawn
+    sq ^= 56  # flip_ns
+    sq -= 8   # Down one row
     pslice = ((sq + (sq & 3)) >> 1)
 
-    return pslice * BLOCK_A + wk * BLOCK_B + bk
-
+    res = pslice * BLOCK_A + wk * BLOCK_B + bk
+    return res
 
 def kpppk_pctoindex(c: Request) -> int:
     BLOCK_A = 64 * 64
@@ -949,16 +1126,26 @@ def kpppk_pctoindex(c: Request) -> int:
     pawn_a = c.white_piece_squares[1]
     pawn_b = c.white_piece_squares[2]
     pawn_c = c.white_piece_squares[3]
+
     bk = c.black_piece_squares[0]
 
-    i, j, k = [x - 8 for x in (pawn_a, pawn_b, pawn_c)]
+    i = pawn_a - 8
+    j = pawn_b - 8
+    k = pawn_c - 8
+
     ppp48_slice = PPP48_IDX[i][j][k]
 
     if idx_is_empty(ppp48_slice):
-        wk, pawn_a, pawn_b, pawn_c, bk = [flip_we(x) for x in (wk, pawn_a, pawn_b, pawn_c, bk)]
+        wk = flip_we(wk)
+        pawn_a = flip_we(pawn_a)
+        pawn_b = flip_we(pawn_b)
+        pawn_c = flip_we(pawn_c)
+        bk = flip_we(bk)
+
+    i = pawn_a - 8
+    j = pawn_b - 8
+    k = pawn_c - 8
 
-    # removing this doesn't impact the tests?
-    i, j, k = [x - 8 for x in (pawn_a, pawn_b, pawn_c)]
     ppp48_slice = PPP48_IDX[i][j][k]
 
     if idx_is_empty(ppp48_slice):
@@ -1143,15 +1330,13 @@ def __init__(self, maxindex: int, slice_n: int, pctoi: Callable[[Request], int])
 
 
 def sortlists(ws: List[int], wp: List[int]) -> Tuple[List[int], List[int]]:
-    z = sorted(zip(wp, ws), reverse=True)
+    z = sorted(zip(wp, ws), key=lambda x: x[0], reverse=True)
     wp2, ws2 = zip(*z)
     return list(ws2), list(wp2)
 
-
 def egtb_block_unpack(side: int, n: int, bp: bytes) -> List[int]:
     return [dtm_unpack(side, i) for i in bp[:n]]
 
-
 def split_index(i: int) -> Tuple[int, int]:
     return divmod(i, ENTRIES_PER_BLOCK)
 
@@ -1175,23 +1360,19 @@ def removepiece(ys: List[int], yp: List[int], j: int) -> None:
     del ys[j]
     del yp[j]
 
-
 def opp(side: int) -> int:
     return 1 if side == 0 else 0
 
-
 def adjust_up(dist: int) -> int:
-    if (dist & INFOMASK) in [iWMATE, iWMATEt, iBMATE, iBMATEt]:
-        return dist + (1 << PLYSHIFT)
-    return dist
+    udist = dist
+    sw = udist & INFOMASK
 
+    if sw in [iWMATE, iWMATEt, iBMATE, iBMATEt]:
+        udist += (1 << PLYSHIFT)
 
-def bestx(side: int, a: int, b: int) -> int:
-    if a == iFORBID:
-        return b
-    if b == iFORBID:
-        return a
+    return udist
 
+def bestx(side: int, a: int, b: int) -> int:
     # 0 = selectfirst
     # 1 = selectlowest
     # 2 = selecthighest
@@ -1204,25 +1385,33 @@ def bestx(side: int, a: int, b: int) -> int:
         [3, 3, 3, 0],  # forbid
     ]
 
+    xorkey = [0, 3]
+
+    if a == iFORBID:
+        return b
+    if b == iFORBID:
+        return a
+
     retu = [a, a, b, b]
 
     if b < a:
-        retu[1:2] = [b, a]
+        retu[1] = b
+        retu[2] = a
 
-    key = comparison[a & 3][b & 3] ^ [0, 3][side]  # ^ xorkey
+    key = comparison[a & 3][b & 3] ^ xorkey[side]
     return retu[key]
 
-
 def unpackdist(d: int) -> Tuple[int, int]:
     return d >> PLYSHIFT, d & INFOMASK
 
-
 def dtm_unpack(stm: int, packed: int) -> int:
-    if packed in [iDRAW, iFORBID]:
-        return packed
+    p = packed
+
+    if p in [iDRAW, iFORBID]:
+        return p
 
-    info = packed & 3
-    store = packed >> 2
+    info = p & 3
+    store = p >> 2
 
     if stm == 0:
         if info == iWMATE:
@@ -1398,23 +1587,28 @@ def probe_dtm(self, board: chess.Board) -> int:
             if req.realside == 1:
                 if req.is_reversed:
                     return ply
-                return -ply
-            if req.is_reversed:
-                return -ply
-            return ply
-
-        if res == iBMATE:
+                else:
+                    return -ply
+            else:
+                if req.is_reversed:
+                    return -ply
+                else:
+                    return ply
+        elif res == iBMATE:
             # Black mates in the stored position.
             if req.realside == 0:
                 if req.is_reversed:
                     return ply
-                return -ply
-            if req.is_reversed:
-                return -ply
-            return ply
-
-        # Draw.
-        return 0
+                else:
+                    return -ply
+            else:
+                if req.is_reversed:
+                    return -ply
+                else:
+                    return ply
+        else:
+            # Draw.
+            return 0
 
     def get_dtm(self, board: chess.Board, default: Optional[int] = None) -> Optional[int]:
         try:
@@ -1450,12 +1644,12 @@ def probe_wdl(self, board: chess.Board) -> int:
         if dtm == 0:
             if board.is_checkmate():
                 return -1
-            return 0
-
-        if dtm > 0:
+            else:
+                return 0
+        elif dtm > 0:
             return 1
-
-        return -1
+        else:
+            return -1
 
     def get_wdl(self, board: chess.Board, default: Optional[int] = None) -> Optional[int]:
         try:
@@ -1601,7 +1795,8 @@ def egtb_block_getsize(self, req: Request, idx: int) -> int:
 
         if (offset + blocksz) > maxindex:
             return maxindex - offset  # Last block size
-        return blocksz  # Size of a normal block
+        else:
+            return blocksz  # Size of a normal block
 
     def _tb_probe(self, req: Request) -> int:
         stream = self._setup_tablebase(req)

From dd4d9c1285d70f1aaffa276244101d9373053c1d Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sun, 23 Feb 2025 22:55:23 +0100
Subject: [PATCH 588/613] Fix ep resolution in chess.gaviota.PythonTablebase
 (fixes #1132)

---
 chess/gaviota.py | 142 +++++++----------------------------------------
 test.py          |   5 ++
 2 files changed, 26 insertions(+), 121 deletions(-)

diff --git a/chess/gaviota.py b/chess/gaviota.py
index 39173b593..83fb7bb64 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -1356,51 +1356,9 @@ def split_index(i: int) -> Tuple[int, int]:
 iBMATEt = tb_BMATE | 4
 
 
-def removepiece(ys: List[int], yp: List[int], j: int) -> None:
-    del ys[j]
-    del yp[j]
-
 def opp(side: int) -> int:
     return 1 if side == 0 else 0
 
-def adjust_up(dist: int) -> int:
-    udist = dist
-    sw = udist & INFOMASK
-
-    if sw in [iWMATE, iWMATEt, iBMATE, iBMATEt]:
-        udist += (1 << PLYSHIFT)
-
-    return udist
-
-def bestx(side: int, a: int, b: int) -> int:
-    # 0 = selectfirst
-    # 1 = selectlowest
-    # 2 = selecthighest
-    # 3 = selectsecond
-    comparison = [
-        # draw, wmate, bmate, forbid
-        [0, 3, 0, 0],  # draw
-        [0, 1, 0, 0],  # wmate
-        [3, 3, 2, 0],  # bmate
-        [3, 3, 3, 0],  # forbid
-    ]
-
-    xorkey = [0, 3]
-
-    if a == iFORBID:
-        return b
-    if b == iFORBID:
-        return a
-
-    retu = [a, a, b, b]
-
-    if b < a:
-        retu[1] = b
-        retu[2] = a
-
-    key = comparison[a & 3][b & 3] ^ xorkey[side]
-    return retu[key]
-
 def unpackdist(d: int) -> Tuple[int, int]:
     return d >> PLYSHIFT, d & INFOMASK
 
@@ -1492,12 +1450,11 @@ class Request:
     black_piece_types: List[int]
     is_reversed: bool
 
-    def __init__(self, white_squares: List[int], white_types: List[chess.PieceType], black_squares: List[int], black_types: List[chess.PieceType], side: int, epsq: int):
+    def __init__(self, white_squares: List[int], white_types: List[chess.PieceType], black_squares: List[int], black_types: List[chess.PieceType], side: int):
         self.white_squares, self.white_types = sortlists(white_squares, white_types)
         self.black_squares, self.black_types = sortlists(black_squares, black_types)
         self.realside = side
         self.side = side
-        self.epsq = epsq
 
 
 @dataclasses.dataclass
@@ -1569,17 +1526,34 @@ def probe_dtm(self, board: chess.Board) -> int:
         if board.occupied == board.kings:
             return 0
 
+        # Resolve en passant.
+        dtm = self._probe_dtm_no_ep(board)
+        for move in board.generate_legal_ep():
+            try:
+                board.push(move)
+
+                child_dtm = -self._probe_dtm_no_ep(board)
+                if child_dtm > 0:
+                    child_dtm += 1
+                elif child_dtm < 0:
+                    child_dtm -= 1
+
+                dtm = min(dtm, child_dtm) if dtm * child_dtm > 0 else max(dtm, child_dtm)
+            finally:
+                board.pop()
+        return dtm
+
+    def _probe_dtm_no_ep(self, board: chess.Board) -> int:
         # Prepare the tablebase request.
         white_squares = list(chess.SquareSet(board.occupied_co[chess.WHITE]))
         white_types = [typing.cast(chess.PieceType, board.piece_type_at(sq)) for sq in white_squares]
         black_squares = list(chess.SquareSet(board.occupied_co[chess.BLACK]))
         black_types = [typing.cast(chess.PieceType, board.piece_type_at(sq)) for sq in black_squares]
         side = 0 if (board.turn == chess.WHITE) else 1
-        epsq = board.ep_square if board.ep_square else NOSQUARE
-        req = Request(white_squares, white_types, black_squares, black_types, side, epsq)
+        req = Request(white_squares, white_types, black_squares, black_types, side)
 
         # Probe.
-        dtm = self.egtb_get_dtm(req)
+        dtm = self._tb_probe(req)
         ply, res = unpackdist(dtm)
 
         if res == iWMATE:
@@ -1675,10 +1649,7 @@ def _setup_tablebase(self, req: Request) -> BinaryIO:
             req.white_piece_types = req.black_types
             req.black_piece_squares = [flip_ns(s) for s in req.white_squares]
             req.black_piece_types = req.white_types
-
             req.side = opp(req.side)
-            if req.epsq != NOSQUARE:
-                req.epsq = flip_ns(req.epsq)
         else:
             raise MissingTableError(f"no gaviota table available for: {white_letters.upper()}v{black_letters.upper()}")
 
@@ -1708,77 +1679,6 @@ def close(self) -> None:
             _, stream = self.streams.popitem()
             stream.close()
 
-    def egtb_get_dtm(self, req: Request) -> int:
-        dtm = self._tb_probe(req)
-
-        if req.epsq != NOSQUARE:
-            capturer_a = 0
-            capturer_b = 0
-            xed = 0
-
-            # Flip for move generation.
-            if req.side == 0:
-                xs = list(req.white_piece_squares)
-                xp = list(req.white_piece_types)
-                ys = list(req.black_piece_squares)
-                yp = list(req.black_piece_types)
-            else:
-                xs = list(req.black_piece_squares)
-                xp = list(req.black_piece_types)
-                ys = list(req.white_piece_squares)
-                yp = list(req.white_piece_types)
-
-            # Captured pawn trick: from ep square to captured.
-            xed = req.epsq ^ (1 << 3)
-
-            # Find captured index (j).
-            try:
-                j = ys.index(xed)
-            except ValueError:
-                j = -1
-
-            # Try first possible ep capture.
-            if 0 == (0x88 & (map88(xed) + 1)):
-                capturer_a = xed + 1
-
-            # Try second possible ep capture.
-            if 0 == (0x88 & (map88(xed) - 1)):
-                capturer_b = xed - 1
-
-            if (j > -1) and (ys[j] == xed):
-                # Find capturers (i).
-                for i in range(len(xs)):
-                    if xp[i] == chess.PAWN and (xs[i] == capturer_a or xs[i] == capturer_b):
-                        epscore = iFORBID
-
-                        # Copy position.
-                        xs_after = xs[:]
-                        ys_after = ys[:]
-                        xp_after = xp[:]
-                        yp_after = yp[:]
-
-                        # Execute capture.
-                        xs_after[i] = req.epsq
-                        removepiece(ys_after, yp_after, j)
-
-                        # Flip back.
-                        if req.side == 1:
-                            xs_after, ys_after = ys_after, xs_after
-                            xp_after, yp_after = yp_after, xp_after
-
-                        # Make subrequest.
-                        subreq = Request(xs_after, xp_after, ys_after, yp_after, opp(req.side), NOSQUARE)
-                        try:
-                            epscore = self._tb_probe(subreq)
-                            epscore = adjust_up(epscore)
-
-                            # Choose to ep or not.
-                            dtm = bestx(req.side, epscore, dtm)
-                        except IndexError:
-                            break
-
-        return dtm
-
     def egtb_block_getnumber(self, req: Request, idx: int) -> int:
         maxindex = EGKEY[req.egkey].maxindex
 
diff --git a/test.py b/test.py
index 6db84d254..7a3a3cdef 100755
--- a/test.py
+++ b/test.py
@@ -4348,6 +4348,11 @@ def test_two_ep(self):
         board = chess.Board("K7/8/8/6k1/5pPp/8/8/8 b - g3 0 61")
         self.assertEqual(self.tablebase.probe_dtm(board), 17)
 
+    @catchAndSkip(chess.gaviota.MissingTableError, "need KPvKP.gtb.cp4")
+    def test_ep_is_best(self):
+        board = chess.Board("8/8/7k/8/1pP5/7K/8/8 b - c3 0 1")
+        self.assertEqual(self.tablebase.probe_dtm(board), 19)
+
 
 class SvgTestCase(unittest.TestCase):
 

From 06de70e2e87969743dfa2196db1e2cbe687a08a8 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 24 Feb 2025 21:52:23 +0100
Subject: [PATCH 589/613] Fix checkmating ep capture in
 chess.gaviota.PythonTablebase

---
 chess/gaviota.py | 17 ++++++++++-------
 test.py          | 10 ++++++++++
 2 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/chess/gaviota.py b/chess/gaviota.py
index 83fb7bb64..281df836b 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -1493,8 +1493,8 @@ def probe_dtm(self, board: chess.Board) -> int:
         Probes for depth to mate information.
 
         The absolute value is the number of half-moves until forced mate
-        (or ``0`` in drawn positions). The value is positive if the
-        side to move is winning, otherwise it is negative.
+        (or ``0`` in drawn or checkmated positions). The value is positive if
+        the side to move is winning, otherwise it is negative or 0.
 
         In the example position, white to move will get mated in 10 half-moves:
 
@@ -1532,11 +1532,14 @@ def probe_dtm(self, board: chess.Board) -> int:
             try:
                 board.push(move)
 
-                child_dtm = -self._probe_dtm_no_ep(board)
-                if child_dtm > 0:
-                    child_dtm += 1
-                elif child_dtm < 0:
-                    child_dtm -= 1
+                if board.is_checkmate():
+                    child_dtm = 1
+                else:
+                    child_dtm = -self._probe_dtm_no_ep(board)
+                    if child_dtm > 0:
+                        child_dtm += 1
+                    elif child_dtm < 0:
+                        child_dtm -= 1
 
                 dtm = min(dtm, child_dtm) if dtm * child_dtm > 0 else max(dtm, child_dtm)
             finally:
diff --git a/test.py b/test.py
index 7a3a3cdef..c120c049f 100755
--- a/test.py
+++ b/test.py
@@ -4353,6 +4353,16 @@ def test_ep_is_best(self):
         board = chess.Board("8/8/7k/8/1pP5/7K/8/8 b - c3 0 1")
         self.assertEqual(self.tablebase.probe_dtm(board), 19)
 
+    @catchAndSkip(chess.gaviota.MissingTableError, "need KQPvKP.gtb.cp4")
+    def test_ep_is_mate(self):
+        # The resulting mate.
+        board = chess.Board("5Q2/7k/6P1/5K2/8/8/8/8 b - - 0 1")
+        self.assertEqual(self.tablebase.probe_dtm(board), 0)
+
+        # Ep leads to the previously tested mate position.
+        board = chess.Board("5Q2/7k/8/5KpP/8/8/8/8 w - g6 0 1")
+        self.assertEqual(self.tablebase.probe_dtm(board), 1)
+
 
 class SvgTestCase(unittest.TestCase):
 

From 45f616fae51a2b08ca4b4d0c01ddddf175d81ff9 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Tue, 25 Feb 2025 20:05:16 +0100
Subject: [PATCH 590/613] Supprt Python 3.13

---
 .github/workflows/test.yml | 8 ++++----
 setup.py                   | 1 +
 tox.ini                    | 2 +-
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 035b7f3d1..22d3b278a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,7 +7,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -24,7 +24,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
-          python-version: "3.12"
+          python-version: "3.13"
       - run: pip install -e .
       - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000
       - run: python examples/perft/perft.py -t 1 examples/perft/chess960.perft --max-nodes 100000
@@ -39,7 +39,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -59,7 +59,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
-          python-version: "3.12"
+          python-version: "3.13"
       - run: sudo apt-get update && sudo apt-get install -y docutils-common
       - run: python setup.py --long-description | rst2html --strict --no-raw > /dev/null
       - run: pip install -e .
diff --git a/setup.py b/setup.py
index b825adb44..9d6aa8c58 100755
--- a/setup.py
+++ b/setup.py
@@ -83,6 +83,7 @@ def read_description():
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Topic :: Games/Entertainment :: Board Games",
         "Topic :: Games/Entertainment :: Turn Based Strategy",
         "Topic :: Software Development :: Libraries :: Python Modules",
diff --git a/tox.ini b/tox.ini
index 8d8033676..5970b2c79 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py38,py39,py310,py311
+envlist = py38,py39,py310,py311,py312,py313
 
 [testenv]
 passenv = LD_LIBRARY_PATH

From b3c1f62c82b5fc40b14fa33bc9edd31cef68a944 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Tue, 25 Feb 2025 19:20:27 +0100
Subject: [PATCH 591/613] Prepare 1.11.2

---
 CHANGELOG.rst     | 8 ++++++++
 chess/__init__.py | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 05b899a20..03a9555d1 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,14 @@
 Changelog for python-chess
 ==========================
 
+New in v1.11.2 (25th Feb 2025)
+------------------------------
+
+Bugfixes:
+
+* Fix ``chess.gaviota.PythonTablebase`` does not properly resolve positions
+  where en passant captures are the best move.
+
 New in v1.11.1 (9th Oct 2024)
 -----------------------------
 
diff --git a/chess/__init__.py b/chess/__init__.py
index 8d0a68258..268f91cd5 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -11,7 +11,7 @@
 
 __email__ = "niklas.fiekas@backscattering.de"
 
-__version__ = "1.11.1"
+__version__ = "1.11.2"
 
 import collections
 import copy

From 2b8b0eb06accff3c4dea2e1cec108b3900a4f1d5 Mon Sep 17 00:00:00 2001
From: Mark Harrison 
Date: Mon, 24 Mar 2025 01:54:37 -0700
Subject: [PATCH 592/613] Add some missing docstrings

This should cause these methods to appear in the readthedocs docs.
---
 chess/__init__.py | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/chess/__init__.py b/chess/__init__.py
index 268f91cd5..28bcad0cd 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -1810,11 +1810,13 @@ def ply(self) -> int:
         return 2 * (self.fullmove_number - 1) + (self.turn == BLACK)
 
     def remove_piece_at(self, square: Square) -> Optional[Piece]:
+        """Remove a piece, if any, from the given square and return the removed piece."""
         piece = super().remove_piece_at(square)
         self.clear_stack()
         return piece
 
     def set_piece_at(self, square: Square, piece: Optional[Piece], promoted: bool = False) -> None:
+        """Place a piece on a square."""
         super().set_piece_at(square, piece, promoted=promoted)
         self.clear_stack()
 
@@ -1998,6 +2000,7 @@ def is_pseudo_legal(self, move: Move) -> bool:
         return bool(self.attacks_mask(move.from_square) & to_mask)
 
     def is_legal(self, move: Move) -> bool:
+        """Check if a move is legal in the current position."""
         return not self.is_variant_end() and self.is_pseudo_legal(move) and not self.is_into_check(move)
 
     def is_variant_end(self) -> bool:
@@ -2034,9 +2037,27 @@ def is_variant_draw(self) -> bool:
         return False
 
     def is_game_over(self, *, claim_draw: bool = False) -> bool:
+        """
+        Check if the game is over by any rule.
+
+        The game is not considered to be over by the
+        :func:`fifty-move rule ` or
+        :func:`threefold repetition `,
+        unless *claim_draw* is given. Note that checking the latter can be
+        slow.
+        """
         return self.outcome(claim_draw=claim_draw) is not None
 
     def result(self, *, claim_draw: bool = False) -> str:
+        """
+        Return the result of a game: 1-0, 0-1, 1/2-1/2, or *.
+
+        The game is not considered to be over by the
+        :func:`fifty-move rule ` or
+        :func:`threefold repetition `,
+        unless *claim_draw* is given. Note that checking the latter can be
+        slow.
+        """
         outcome = self.outcome(claim_draw=claim_draw)
         return outcome.result() if outcome else "*"
 

From b2144c2564f740ea120d037e9ec6129d8a3bea2c Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 3 Oct 2025 23:01:01 +0200
Subject: [PATCH 593/613] Remove explicit CodeQL configuration

---
 .github/workflows/codeql.yml | 18 ------------------
 1 file changed, 18 deletions(-)
 delete mode 100644 .github/workflows/codeql.yml

diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
deleted file mode 100644
index bc991c885..000000000
--- a/.github/workflows/codeql.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-name: CodeQL
-
-on: [push, pull_request]
-
-jobs:
-  analyze:
-    name: Analyze
-    runs-on: ubuntu-latest
-    permissions:
-      actions: read
-      contents: read
-      security-events: write
-    steps:
-      - uses: actions/checkout@v4
-      - uses: github/codeql-action/init@v3
-        with:
-          languages: python
-      - uses: github/codeql-action/analyze@v3

From 760360b8ddb65129aea46f84d99b5491e6ed6435 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 3 Oct 2025 23:04:49 +0200
Subject: [PATCH 594/613] Explicitly specify CI workflow permissions

---
 .github/workflows/test.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 22d3b278a..9eca0fce3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -2,6 +2,9 @@ name: Test
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   test:
     strategy:

From 6b1cfedd442a05767ee28c7752a800ad4190f423 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 3 Oct 2025 23:14:56 +0200
Subject: [PATCH 595/613] Fix chess.gaviota bytearray usage does not pass mypy
 1.18

---
 chess/gaviota.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/gaviota.py b/chess/gaviota.py
index 281df836b..dc19557cd 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -1716,7 +1716,7 @@ def _tb_probe(self, req: Request) -> int:
             z = self.egtb_block_getsize_zipped(req.egkey, block)
 
             self.egtb_block_park(req.egkey, block, stream)
-            buffer_zipped = stream.read(z)
+            buffer_zipped: bytearray | bytes = stream.read(z)
 
             if buffer_zipped[0] == 0:
                 # If flag is zero, plain LZMA is following.

From 71f5a21fe9a83770081fa9f7d2deb3835db984e4 Mon Sep 17 00:00:00 2001
From: Jackson Hall 
Date: Sat, 4 Oct 2025 16:52:41 -0400
Subject: [PATCH 596/613] Add and use rank/file constants

---
 chess/__init__.py | 80 +++++++++++++++++++++++++++++------------------
 chess/gaviota.py  |  8 ++---
 chess/syzygy.py   |  2 +-
 3 files changed, 55 insertions(+), 35 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 28bcad0cd..3d3dad4f0 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -64,8 +64,28 @@ def piece_name(piece_type: PieceType) -> str:
     "P": "♙", "p": "♟",
 }
 
+File: TypeAlias = int
+FILE_A: File = 0
+FILE_B: File = 1
+FILE_C: File = 2
+FILE_D: File = 3
+FILE_E: File = 4
+FILE_F: File = 5
+FILE_G: File = 6
+FILE_H: File = 7
+FILES = [FILE_A, FILE_B, FILE_C, FILE_D, FILE_E, FILE_F, FILE_G, FILE_H]
 FILE_NAMES = ["a", "b", "c", "d", "e", "f", "g", "h"]
 
+Rank: TypeAlias = int
+RANK_1: Rank = 0
+RANK_2: Rank = 1
+RANK_3: Rank = 2
+RANK_4: Rank = 3
+RANK_5: Rank = 4
+RANK_6: Rank = 5
+RANK_7: Rank = 6
+RANK_8: Rank = 7
+RANKS = [RANK_1, RANK_2, RANK_3, RANK_4, RANK_5, RANK_6, RANK_7, RANK_8]
 RANK_NAMES = ["1", "2", "3", "4", "5", "6", "7", "8"]
 
 STARTING_FEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"
@@ -251,15 +271,15 @@ def square_name(square: Square) -> str:
     """Gets the name of the square, like ``a3``."""
     return SQUARE_NAMES[square]
 
-def square(file_index: int, rank_index: int) -> Square:
+def square(file_index: File, rank_index: Rank) -> Square:
     """Gets a square number by file and rank index."""
     return rank_index * 8 + file_index
 
-def square_file(square: Square) -> int:
+def square_file(square: Square) -> File:
     """Gets the file index of the square where ``0`` is the a-file."""
     return square & 7
 
-def square_rank(square: Square) -> int:
+def square_rank(square: Square) -> Rank:
     """Gets the rank index of the square where ``0`` is the first rank."""
     return square >> 3
 
@@ -376,24 +396,24 @@ def square_mirror(square: Square) -> Square:
 BB_LIGHT_SQUARES: Bitboard = 0x55aa_55aa_55aa_55aa
 BB_DARK_SQUARES: Bitboard = 0xaa55_aa55_aa55_aa55
 
-BB_FILE_A: Bitboard = 0x0101_0101_0101_0101 << 0
-BB_FILE_B: Bitboard = 0x0101_0101_0101_0101 << 1
-BB_FILE_C: Bitboard = 0x0101_0101_0101_0101 << 2
-BB_FILE_D: Bitboard = 0x0101_0101_0101_0101 << 3
-BB_FILE_E: Bitboard = 0x0101_0101_0101_0101 << 4
-BB_FILE_F: Bitboard = 0x0101_0101_0101_0101 << 5
-BB_FILE_G: Bitboard = 0x0101_0101_0101_0101 << 6
-BB_FILE_H: Bitboard = 0x0101_0101_0101_0101 << 7
+BB_FILE_A: Bitboard = 0x0101_0101_0101_0101 << FILE_A
+BB_FILE_B: Bitboard = 0x0101_0101_0101_0101 << FILE_B
+BB_FILE_C: Bitboard = 0x0101_0101_0101_0101 << FILE_C
+BB_FILE_D: Bitboard = 0x0101_0101_0101_0101 << FILE_D
+BB_FILE_E: Bitboard = 0x0101_0101_0101_0101 << FILE_E
+BB_FILE_F: Bitboard = 0x0101_0101_0101_0101 << FILE_F
+BB_FILE_G: Bitboard = 0x0101_0101_0101_0101 << FILE_G
+BB_FILE_H: Bitboard = 0x0101_0101_0101_0101 << FILE_H
 BB_FILES: List[Bitboard] = [BB_FILE_A, BB_FILE_B, BB_FILE_C, BB_FILE_D, BB_FILE_E, BB_FILE_F, BB_FILE_G, BB_FILE_H]
 
-BB_RANK_1: Bitboard = 0xff << (8 * 0)
-BB_RANK_2: Bitboard = 0xff << (8 * 1)
-BB_RANK_3: Bitboard = 0xff << (8 * 2)
-BB_RANK_4: Bitboard = 0xff << (8 * 3)
-BB_RANK_5: Bitboard = 0xff << (8 * 4)
-BB_RANK_6: Bitboard = 0xff << (8 * 5)
-BB_RANK_7: Bitboard = 0xff << (8 * 6)
-BB_RANK_8: Bitboard = 0xff << (8 * 7)
+BB_RANK_1: Bitboard = 0xff << (8 * RANK_1)
+BB_RANK_2: Bitboard = 0xff << (8 * RANK_2)
+BB_RANK_3: Bitboard = 0xff << (8 * RANK_3)
+BB_RANK_4: Bitboard = 0xff << (8 * RANK_4)
+BB_RANK_5: Bitboard = 0xff << (8 * RANK_5)
+BB_RANK_6: Bitboard = 0xff << (8 * RANK_6)
+BB_RANK_7: Bitboard = 0xff << (8 * RANK_7)
+BB_RANK_8: Bitboard = 0xff << (8 * RANK_8)
 BB_RANKS: List[Bitboard] = [BB_RANK_1, BB_RANK_2, BB_RANK_3, BB_RANK_4, BB_RANK_5, BB_RANK_6, BB_RANK_7, BB_RANK_8]
 
 BB_BACKRANKS: Bitboard = BB_RANK_1 | BB_RANK_8
@@ -1847,7 +1867,7 @@ def generate_pseudo_legal_moves(self, from_mask: Bitboard = BB_ALL, to_mask: Bit
                 self.occupied_co[not self.turn] & to_mask)
 
             for to_square in scan_reversed(targets):
-                if square_rank(to_square) in [0, 7]:
+                if square_rank(to_square) in [RANK_1, RANK_8]:
                     yield Move(from_square, to_square, QUEEN)
                     yield Move(from_square, to_square, ROOK)
                     yield Move(from_square, to_square, BISHOP)
@@ -1870,7 +1890,7 @@ def generate_pseudo_legal_moves(self, from_mask: Bitboard = BB_ALL, to_mask: Bit
         for to_square in scan_reversed(single_moves):
             from_square = to_square + (8 if self.turn == BLACK else -8)
 
-            if square_rank(to_square) in [0, 7]:
+            if square_rank(to_square) in [RANK_1, RANK_8]:
                 yield Move(from_square, to_square, QUEEN)
                 yield Move(from_square, to_square, ROOK)
                 yield Move(from_square, to_square, BISHOP)
@@ -1897,7 +1917,7 @@ def generate_pseudo_legal_ep(self, from_mask: Bitboard = BB_ALL, to_mask: Bitboa
         capturers = (
             self.pawns & self.occupied_co[self.turn] & from_mask &
             BB_PAWN_ATTACKS[not self.turn][self.ep_square] &
-            BB_RANKS[4 if self.turn else 3])
+            BB_RANKS[RANK_5 if self.turn else RANK_4])
 
         for capturer in scan_reversed(capturers):
             yield Move(capturer, self.ep_square)
@@ -1977,9 +1997,9 @@ def is_pseudo_legal(self, move: Move) -> bool:
             if piece != PAWN:
                 return False
 
-            if self.turn == WHITE and square_rank(move.to_square) != 7:
+            if self.turn == WHITE and square_rank(move.to_square) != RANK_8:
                 return False
-            elif self.turn == BLACK and square_rank(move.to_square) != 0:
+            elif self.turn == BLACK and square_rank(move.to_square) != RANK_1:
                 return False
 
         # Handle castling.
@@ -2401,18 +2421,18 @@ def push(self, move: Move) -> None:
             else:
                 self.castling_rights &= ~BB_RANK_8
         elif captured_piece_type == KING and not self.promoted & to_bb:
-            if self.turn == WHITE and square_rank(move.to_square) == 7:
+            if self.turn == WHITE and square_rank(move.to_square) == RANK_8:
                 self.castling_rights &= ~BB_RANK_8
-            elif self.turn == BLACK and square_rank(move.to_square) == 0:
+            elif self.turn == BLACK and square_rank(move.to_square) == RANK_1:
                 self.castling_rights &= ~BB_RANK_1
 
         # Handle special pawn moves.
         if piece_type == PAWN:
             diff = move.to_square - move.from_square
 
-            if diff == 16 and square_rank(move.from_square) == 1:
+            if diff == 16 and square_rank(move.from_square) == RANK_2:
                 self.ep_square = move.from_square + 8
-            elif diff == -16 and square_rank(move.from_square) == 6:
+            elif diff == -16 and square_rank(move.from_square) == RANK_7:
                 self.ep_square = move.from_square - 8
             elif move.to_square == ep_square and abs(diff) in [7, 9] and not captured_piece_type:
                 # Remove pawns captured en passant.
@@ -3605,11 +3625,11 @@ def _valid_ep_square(self) -> Optional[Square]:
             return None
 
         if self.turn == WHITE:
-            ep_rank = 5
+            ep_rank = RANK_6
             pawn_mask = shift_down(BB_SQUARES[self.ep_square])
             seventh_rank_mask = shift_up(BB_SQUARES[self.ep_square])
         else:
-            ep_rank = 2
+            ep_rank = RANK_3
             pawn_mask = shift_up(BB_SQUARES[self.ep_square])
             seventh_rank_mask = shift_down(BB_SQUARES[self.ep_square])
 
diff --git a/chess/gaviota.py b/chess/gaviota.py
index dc19557cd..c352a27ca 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -110,12 +110,12 @@ def idx_is_empty(x: int) -> int:
 def flip_type(x: chess.Square, y: chess.Square) -> int:
     ret = 0
 
-    if chess.square_file(x) > 3:
+    if chess.square_file(x) > chess.FILE_D:
         x = flip_we(x)
         y = flip_we(y)
         ret |= 1
 
-    if chess.square_rank(x) > 3:
+    if chess.square_rank(x) > chess.RANK_4:
         x = flip_ns(x)
         y = flip_ns(y)
         ret |= 2
@@ -351,11 +351,11 @@ def init_ppidx() -> Tuple[List[List[int]], List[int], List[int]]:
 
 
 def norm_kkindex(x: chess.Square, y: chess.Square) -> Tuple[int, int]:
-    if chess.square_file(x) > 3:
+    if chess.square_file(x) > chess.FILE_D:
         x = flip_we(x)
         y = flip_we(y)
 
-    if chess.square_rank(x) > 3:
+    if chess.square_rank(x) > chess.RANK_4:
         x = flip_ns(x)
         y = flip_ns(y)
 
diff --git a/chess/syzygy.py b/chess/syzygy.py
index c61890550..0c6b7822c 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -761,7 +761,7 @@ def calc_symlen(self, d: PairsData, s: int, tmp: List[int]) -> None:
             d.symlen[s] = d.symlen[s1] + d.symlen[s2] + 1
         tmp[s] = 1
 
-    def pawn_file(self, pos: List[chess.Square]) -> int:
+    def pawn_file(self, pos: List[chess.Square]) -> chess.File:
         for i in range(1, self.pawns[0]):
             if FLAP[pos[0]] > FLAP[pos[i]]:
                 pos[0], pos[i] = pos[i], pos[0]

From bd8074d20e7aa667315b54470d0f3aae6390e69d Mon Sep 17 00:00:00 2001
From: Jackson Hall 
Date: Sat, 4 Oct 2025 20:47:45 -0400
Subject: [PATCH 597/613] Add `parse_file`/`parse_rank`, `file_name`/rank_name`

---
 chess/__init__.py | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/chess/__init__.py b/chess/__init__.py
index 3d3dad4f0..84bfa632a 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -275,6 +275,32 @@ def square(file_index: File, rank_index: Rank) -> Square:
     """Gets a square number by file and rank index."""
     return rank_index * 8 + file_index
 
+def parse_file(name: str) -> File:
+    """
+    Gets the file index for the given file *name*
+    (e.g., ``a`` returns ``0``).
+
+    :raises: :exc:`ValueError` if the file name is invalid.
+    """
+    return FILE_NAMES.index(name)
+
+def file_name(file: File) -> str:
+    """Gets the name of the file, like ``a``."""
+    return FILE_NAMES[file]
+
+def parse_rank(name: str) -> File:
+    """
+    Gets the rank index for the given rank *name*
+    (e.g., ``1`` returns ``0``).
+
+    :raises: :exc:`ValueError` if the rank name is invalid.
+    """
+    return FILE_NAMES.index(name)
+
+def rank_name(rank: Rank) -> str:
+    """Gets the name of the rank, like ``1``."""
+    return FILE_NAMES[rank]
+
 def square_file(square: Square) -> File:
     """Gets the file index of the square where ``0`` is the a-file."""
     return square & 7

From 376d603694913a82bcb2efa594972a5fba5804f6 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 11 Oct 2025 09:20:54 +0200
Subject: [PATCH 598/613] Explicitly support Python 3.14

---
 .github/workflows/test.yml | 24 ++++++++++++------------
 setup.py                   |  1 +
 tox.ini                    |  2 +-
 3 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 9eca0fce3..6b31bce24 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,11 +10,11 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
       - run: .github/workflows/setup-${{ matrix.os }}.sh
@@ -24,10 +24,10 @@ jobs:
   perft:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-python@v6
         with:
-          python-version: "3.13"
+          python-version: "3.14"
       - run: pip install -e .
       - run: python examples/perft/perft.py -t 1 examples/perft/random.perft --max-nodes 10000
       - run: python examples/perft/perft.py -t 1 examples/perft/chess960.perft --max-nodes 100000
@@ -42,11 +42,11 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
       - run: pip install -e .
@@ -59,10 +59,10 @@ jobs:
   readme:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-python@v6
         with:
-          python-version: "3.13"
+          python-version: "3.14"
       - run: sudo apt-get update && sudo apt-get install -y docutils-common
       - run: python setup.py --long-description | rst2html --strict --no-raw > /dev/null
       - run: pip install -e .
diff --git a/setup.py b/setup.py
index 9d6aa8c58..5815947cd 100755
--- a/setup.py
+++ b/setup.py
@@ -84,6 +84,7 @@ def read_description():
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: 3.13",
+        "Programming Language :: Python :: 3.14",
         "Topic :: Games/Entertainment :: Board Games",
         "Topic :: Games/Entertainment :: Turn Based Strategy",
         "Topic :: Software Development :: Libraries :: Python Modules",
diff --git a/tox.ini b/tox.ini
index 5970b2c79..493a46feb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py38,py39,py310,py311,py312,py313
+envlist = py38,py39,py310,py311,py312,py313,py314
 
 [testenv]
 passenv = LD_LIBRARY_PATH

From e4386c2f1efcb686c1d6222681cc84d1f0b06ded Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 11 Oct 2025 15:25:33 +0200
Subject: [PATCH 599/613] Remove chess.engine.DefaultEventLoopPolicy (breaking
 change forced by Python)

---
 chess/engine.py | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index b979b278f..8482c31ba 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -50,10 +50,6 @@ def override(fn: F, /) -> F:
 MANAGED_OPTIONS = ["uci_chess960", "uci_variant", "multipv", "ponder"]
 
 
-# No longer needed, but alias kept around for compatibility.
-EventLoopPolicy = asyncio.DefaultEventLoopPolicy
-
-
 def run_in_background(coroutine: Callable[[concurrent.futures.Future[T]], Coroutine[Any, Any, None]], *, name: Optional[str] = None, debug: Optional[bool] = None) -> T:
     """
     Runs ``coroutine(future)`` in a new event loop on a background thread.

From e974a37e52a59709a0988872a12c1f01244a8c15 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 11 Oct 2025 15:30:39 +0200
Subject: [PATCH 600/613] Fix test_sf_forced_mates() failing due to ambiguous
 mate

---
 test.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test.py b/test.py
index c120c049f..2ebd357d0 100755
--- a/test.py
+++ b/test.py
@@ -3079,7 +3079,7 @@ def test_sf_forced_mates(self):
 
             for epd in epds:
                 operations = board.set_epd(epd)
-                result = engine.play(board, chess.engine.Limit(mate=5), game=object())
+                result = engine.play(board, chess.engine.Limit(mate=3), game=object())
                 self.assertIn(result.move, operations["bm"], operations["id"])
 
     @catchAndSkip(FileNotFoundError, "need stockfish")

From 8412bd56a282f7fe7071a8b1788b6b791d5e7b0e Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 11 Oct 2025 15:33:30 +0200
Subject: [PATCH 601/613] asyncio.iscoroutinefunction() ->
 inspect.iscoroutinefunction()

---
 chess/engine.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/chess/engine.py b/chess/engine.py
index 8482c31ba..913940190 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -8,6 +8,7 @@
 import copy
 import dataclasses
 import enum
+import inspect
 import logging
 import math
 import shlex
@@ -58,7 +59,7 @@ def run_in_background(coroutine: Callable[[concurrent.futures.Future[T]], Corout
     The coroutine and all remaining tasks continue running in the background
     until complete.
     """
-    assert asyncio.iscoroutinefunction(coroutine)
+    assert inspect.iscoroutinefunction(coroutine)
 
     future: concurrent.futures.Future[T] = concurrent.futures.Future()
 

From 624d3a730c180e749ea04a473a828b9c31ff52a4 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 11 Oct 2025 15:38:19 +0200
Subject: [PATCH 602/613] Do not fail-fast matrix jobs that may have
 interesting results

---
 .github/workflows/test.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 6b31bce24..9d0880bb4 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,6 +11,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest]
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+      fail-fast: false
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v5
@@ -43,6 +44,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest]
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+      fail-fast: false
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5

From 4d9b3bfd860bfa95731d4e208fd98c7c10a15533 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Mon, 27 Oct 2025 21:24:16 +0100
Subject: [PATCH 603/613] Fix Gaviota tables opened as writable (fixes #1166)

---
 chess/gaviota.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/gaviota.py b/chess/gaviota.py
index c352a27ca..8beb18d4d 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -1663,7 +1663,7 @@ def _open_tablebase(self, req: Request) -> BinaryIO:
 
         if stream is None:
             path = self.available_tables[req.egkey]
-            stream = open(path, "rb+")
+            stream = open(path, "rb")
             self.egtb_loadindexes(req.egkey, stream)
             self.streams[req.egkey] = stream
 

From f8575f962caf3fcddcf95d935d1d75a1cceb586b Mon Sep 17 00:00:00 2001
From: Jackson Hall 
Date: Sun, 2 Nov 2025 18:46:03 -0500
Subject: [PATCH 604/613] Add `Board.gives_checkmate()`

---
 chess/__init__.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/chess/__init__.py b/chess/__init__.py
index 84bfa632a..b51c31ca3 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -1980,6 +1980,17 @@ def gives_check(self, move: Move) -> bool:
         finally:
             self.pop()
 
+    def gives_checkmate(self, move: Move) -> bool:
+        """
+        Probes if the given move would put the opponent in checkmate. The move
+        must be at least pseudo-legal.
+        """
+        self.push(move)
+        try:
+            return self.is_checkmate()
+        finally:
+            self.pop()
+
     def is_into_check(self, move: Move) -> bool:
         king = self.king(self.turn)
         if king is None:

From d59bad55df4b8759e53b0ee8673ec8e69c5f5a82 Mon Sep 17 00:00:00 2001
From: johndoknjas 
Date: Fri, 2 Jan 2026 10:02:39 -0800
Subject: [PATCH 605/613] Ensure hash is always set after threads.

---
 chess/engine.py | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 913940190..72b579dc9 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1875,12 +1875,16 @@ def _parse_uci_bestmove(board: chess.Board, args: str) -> BestMove:
     return BestMove(move, ponder)
 
 
-def _chain_config(a: ConfigMapping, b: ConfigMapping) -> Iterator[Tuple[str, ConfigValue]]:
-    for name, value in a.items():
+def _chain_config(a: ConfigMapping, b: ConfigMapping, with_hash_reordering: bool = True) -> Iterator[Tuple[str, ConfigValue]]:
+    merged = dict(a)
+    for k, v in b.items():
+        merged.setdefault(k, v)
+    if with_hash_reordering and 'Hash' in merged and 'Threads' in merged:
+        hash_val = merged['Hash']
+        del merged['Hash']
+        merged['Hash'] = hash_val
+    for name, value in merged.items():
         yield name, value
-    for name, value in b.items():
-        if name not in a:
-            yield name, value
 
 
 class UciOptionMap(MutableMapping[str, T]):

From a5bbe3ea49f04b6a153efd278d1d17b073a11fc0 Mon Sep 17 00:00:00 2001
From: johndoknjas 
Date: Fri, 2 Jan 2026 20:46:19 -0800
Subject: [PATCH 606/613] Remove optional parameter.

---
 chess/engine.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 72b579dc9..0a9af75d9 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1875,11 +1875,11 @@ def _parse_uci_bestmove(board: chess.Board, args: str) -> BestMove:
     return BestMove(move, ponder)
 
 
-def _chain_config(a: ConfigMapping, b: ConfigMapping, with_hash_reordering: bool = True) -> Iterator[Tuple[str, ConfigValue]]:
+def _chain_config(a: ConfigMapping, b: ConfigMapping) -> Iterator[Tuple[str, ConfigValue]]:
     merged = dict(a)
     for k, v in b.items():
         merged.setdefault(k, v)
-    if with_hash_reordering and 'Hash' in merged and 'Threads' in merged:
+    if 'Hash' in merged and 'Threads' in merged:
         hash_val = merged['Hash']
         del merged['Hash']
         merged['Hash'] = hash_val

From a28315bbfe31410120e97aa2f2fe56a19043e242 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Sat, 3 Jan 2026 12:29:26 +0100
Subject: [PATCH 607/613] Comment Hash after Threads

---
 chess/engine.py | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/chess/engine.py b/chess/engine.py
index 0a9af75d9..c66bc0c45 100644
--- a/chess/engine.py
+++ b/chess/engine.py
@@ -1875,16 +1875,16 @@ def _parse_uci_bestmove(board: chess.Board, args: str) -> BestMove:
     return BestMove(move, ponder)
 
 
-def _chain_config(a: ConfigMapping, b: ConfigMapping) -> Iterator[Tuple[str, ConfigValue]]:
+def _chain_config(a: ConfigMapping, b: ConfigMapping) -> Iterable[Tuple[str, ConfigValue]]:
     merged = dict(a)
     for k, v in b.items():
         merged.setdefault(k, v)
-    if 'Hash' in merged and 'Threads' in merged:
-        hash_val = merged['Hash']
-        del merged['Hash']
-        merged['Hash'] = hash_val
-    for name, value in merged.items():
-        yield name, value
+    if "Hash" in merged and "Threads" in merged:
+        # Move Hash after Threads, as recommended by Stockfish.
+        hash_val = merged["Hash"]
+        del merged["Hash"]
+        merged["Hash"] = hash_val
+    return merged.items()
 
 
 class UciOptionMap(MutableMapping[str, T]):

From 76cbe9843b7be94676cf19ea2a446e4eb3ac4291 Mon Sep 17 00:00:00 2001
From: winapiadmin <138602885+winapiadmin@users.noreply.github.com>
Date: Fri, 13 Feb 2026 21:41:52 +0000
Subject: [PATCH 608/613] Multiple kings per color (was_into_check and more
 affected) (#1179)

* fixed multiple kings for was_into_check

* fixed king() behavior on multiple kings

minus prev commit

* add test cases (very little)

* using the precomputed king mask

* removed testcase of was_into_check() on multiple kings...

... because it would cause the function to return False (because king() didn't detect any king because of decision)
---
 chess/__init__.py | 2 +-
 test.py           | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index b51c31ca3..347f22ea1 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -916,7 +916,7 @@ def king(self, color: Color) -> Optional[Square]:
         considered.
         """
         king_mask = self.occupied_co[color] & self.kings & ~self.promoted
-        return msb(king_mask) if king_mask else None
+        return msb(king_mask) if king_mask and popcount(king_mask) == 1 else None
 
     def attacks_mask(self, square: Square) -> Bitboard:
         bb_square = BB_SQUARES[square]
diff --git a/test.py b/test.py
index 2ebd357d0..4927a2b80 100755
--- a/test.py
+++ b/test.py
@@ -1720,6 +1720,10 @@ def test_impossible_check_due_to_en_passant(self):
         self.assertFalse(board.has_legal_en_passant())
         self.assertEqual(len(list(board.legal_moves)), 2)
 
+    def test_multiple_kings(self):
+        board = chess.Board("KKKK1kkk/8/8/8/8/8/8/8 w - - 0 1")
+        self.assertEqual(board.king(chess.WHITE), None)
+
 
 class LegalMoveGeneratorTestCase(unittest.TestCase):
 

From 312f3bf07758628e4ee9befbd9e3df7dd5eccea6 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 13 Feb 2026 22:52:23 +0100
Subject: [PATCH 609/613] Introduce Board._effective_promoted()

---
 chess/__init__.py | 55 ++++++++++++++++++++++++++++-------------------
 chess/variant.py  | 27 +++++++----------------
 2 files changed, 41 insertions(+), 41 deletions(-)

diff --git a/chess/__init__.py b/chess/__init__.py
index 347f22ea1..7fe4cb9cc 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -907,16 +907,19 @@ def color_at(self, square: Square) -> Optional[Color]:
         else:
             return None
 
+    def _effective_promoted(self) -> Bitboard:
+        return BB_EMPTY
+
     def king(self, color: Color) -> Optional[Square]:
         """
-        Finds the king square of the given side. Returns ``None`` if there
-        is no king of that color.
+        Finds the unique king square of the given side. Returns ``None`` if
+        there is no king or multiple kings of that color.
 
         In variants with king promotions, only non-promoted kings are
         considered.
         """
-        king_mask = self.occupied_co[color] & self.kings & ~self.promoted
-        return msb(king_mask) if king_mask and popcount(king_mask) == 1 else None
+        king_mask = self.occupied_co[color] & self.kings & ~self._effective_promoted()
+        return msb(king_mask) if king_mask and not king_mask & (king_mask - 1) else None
 
     def attacks_mask(self, square: Square) -> Bitboard:
         bb_square = BB_SQUARES[square]
@@ -1135,7 +1138,7 @@ def set_piece_at(self, square: Square, piece: Optional[Piece], promoted: bool =
         else:
             self._set_piece_at(square, piece.piece_type, piece.color, promoted)
 
-    def board_fen(self, *, promoted: Optional[bool] = False) -> str:
+    def board_fen(self, *, promoted: Optional[bool] = None) -> str:
         """
         Gets the board FEN (e.g.,
         ``rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR``).
@@ -1153,7 +1156,14 @@ def board_fen(self, *, promoted: Optional[bool] = False) -> str:
                     builder.append(str(empty))
                     empty = 0
                 builder.append(piece.symbol())
-                if promoted and BB_SQUARES[square] & self.promoted:
+
+                if promoted is None:
+                    promoted_mask = self._effective_promoted()
+                elif promoted:
+                    promoted_mask = self.promoted
+                else:
+                    promoted_mask = BB_EMPTY
+                if BB_SQUARES[square] & promoted_mask:
                     builder.append("~")
 
             if BB_SQUARES[square] & BB_FILE_H:
@@ -1335,7 +1345,7 @@ def chess960_pos(self) -> Optional[int]:
             return None
         if self.pawns != BB_RANK_2 | BB_RANK_7:
             return None
-        if self.promoted:
+        if self._effective_promoted():
             return None
 
         # Piece counts.
@@ -2452,12 +2462,12 @@ def push(self, move: Move) -> None:
 
         # Update castling rights.
         self.castling_rights &= ~to_bb & ~from_bb
-        if piece_type == KING and not promoted:
+        if piece_type == KING and not self._effective_promoted() & from_bb:
             if self.turn == WHITE:
                 self.castling_rights &= ~BB_RANK_1
             else:
                 self.castling_rights &= ~BB_RANK_8
-        elif captured_piece_type == KING and not self.promoted & to_bb:
+        elif captured_piece_type == KING and not self._effective_promoted() & to_bb:
             if self.turn == WHITE and square_rank(move.to_square) == RANK_8:
                 self.castling_rights &= ~BB_RANK_8
             elif self.turn == BLACK and square_rank(move.to_square) == RANK_1:
@@ -3404,8 +3414,8 @@ def _reduces_castling_rights(self, move: Move) -> bool:
         cr = self.clean_castling_rights()
         touched = BB_SQUARES[move.from_square] ^ BB_SQUARES[move.to_square]
         return bool(touched & cr or
-                    cr & BB_RANK_1 and touched & self.kings & self.occupied_co[WHITE] & ~self.promoted or
-                    cr & BB_RANK_8 and touched & self.kings & self.occupied_co[BLACK] & ~self.promoted)
+                    cr & BB_RANK_1 and touched & self.kings & self.occupied_co[WHITE] & ~self._effective_promoted() or
+                    cr & BB_RANK_8 and touched & self.kings & self.occupied_co[BLACK] & ~self._effective_promoted())
 
     def is_irreversible(self, move: Move) -> bool:
         """
@@ -3459,16 +3469,16 @@ def clean_castling_rights(self) -> Bitboard:
             black_castling &= (BB_A8 | BB_H8)
 
             # The kings must be on e1 or e8.
-            if not self.occupied_co[WHITE] & self.kings & ~self.promoted & BB_E1:
+            if not self.occupied_co[WHITE] & self.kings & ~self._effective_promoted() & BB_E1:
                 white_castling = 0
-            if not self.occupied_co[BLACK] & self.kings & ~self.promoted & BB_E8:
+            if not self.occupied_co[BLACK] & self.kings & ~self._effective_promoted() & BB_E8:
                 black_castling = 0
 
             return white_castling | black_castling
         else:
             # The kings must be on the back rank.
-            white_king_mask = self.occupied_co[WHITE] & self.kings & BB_RANK_1 & ~self.promoted
-            black_king_mask = self.occupied_co[BLACK] & self.kings & BB_RANK_8 & ~self.promoted
+            white_king_mask = self.occupied_co[WHITE] & self.kings & BB_RANK_1 & ~self._effective_promoted()
+            black_king_mask = self.occupied_co[BLACK] & self.kings & BB_RANK_8 & ~self._effective_promoted()
             if not white_king_mask:
                 white_castling = 0
             if not black_king_mask:
@@ -3506,7 +3516,7 @@ def has_kingside_castling_rights(self, color: Color) -> bool:
         castling rights.
         """
         backrank = BB_RANK_1 if color == WHITE else BB_RANK_8
-        king_mask = self.kings & self.occupied_co[color] & backrank & ~self.promoted
+        king_mask = self.kings & self.occupied_co[color] & backrank & ~self._effective_promoted()
         if not king_mask:
             return False
 
@@ -3527,7 +3537,7 @@ def has_queenside_castling_rights(self, color: Color) -> bool:
         castling rights.
         """
         backrank = BB_RANK_1 if color == WHITE else BB_RANK_8
-        king_mask = self.kings & self.occupied_co[color] & backrank & ~self.promoted
+        king_mask = self.kings & self.occupied_co[color] & backrank & ~self._effective_promoted()
         if not king_mask:
             return False
 
@@ -3600,11 +3610,11 @@ def status(self) -> Status:
             errors |= STATUS_EMPTY
 
         # There must be exactly one king of each color.
-        if not self.occupied_co[WHITE] & self.kings:
+        if not self.occupied_co[WHITE] & self.kings & ~self._effective_promoted():
             errors |= STATUS_NO_WHITE_KING
-        if not self.occupied_co[BLACK] & self.kings:
+        if not self.occupied_co[BLACK] & self.kings & ~self._effective_promoted():
             errors |= STATUS_NO_BLACK_KING
-        if popcount(self.occupied & self.kings) > 2:
+        if popcount(self.occupied & self.kings & ~self._effective_promoted()) > 2:
             errors |= STATUS_TOO_MANY_KINGS
 
         # There can not be more than 16 pieces of any color.
@@ -3638,7 +3648,7 @@ def status(self) -> Status:
 
         # More than the maximum number of possible checkers in the variant.
         checkers = self.checkers_mask()
-        our_kings = self.kings & self.occupied_co[self.turn] & ~self.promoted
+        our_kings = self.kings & self.occupied_co[self.turn] & ~self._effective_promoted()
         if checkers:
             if popcount(checkers) > 2:
                 errors |= STATUS_TOO_MANY_CHECKERS
@@ -3822,7 +3832,7 @@ def generate_castling_moves(self, from_mask: Bitboard = BB_ALL, to_mask: Bitboar
             return
 
         backrank = BB_RANK_1 if self.turn == WHITE else BB_RANK_8
-        king = self.occupied_co[self.turn] & self.kings & ~self.promoted & backrank & from_mask
+        king = self.occupied_co[self.turn] & self.kings & ~self._effective_promoted() & backrank & from_mask
         king &= -king
         if not king:
             return
@@ -3879,6 +3889,7 @@ def _to_chess960(self, move: Move) -> Move:
     def _transposition_key(self) -> Hashable:
         return (self.pawns, self.knights, self.bishops, self.rooks,
                 self.queens, self.kings,
+                self._effective_promoted(),
                 self.occupied_co[WHITE], self.occupied_co[BLACK],
                 self.turn, self.clean_castling_rights(),
                 self.ep_square if self.has_legal_en_passant() else None)
diff --git a/chess/variant.py b/chess/variant.py
index 6e9161dc8..ba4c0f1ce 100644
--- a/chess/variant.py
+++ b/chess/variant.py
@@ -127,16 +127,8 @@ def is_legal(self, move: chess.Move) -> bool:
         else:
             return not any(self.generate_pseudo_legal_captures())
 
-    def _transposition_key(self) -> Hashable:
-        if self.has_chess960_castling_rights():
-            return (super()._transposition_key(), self.kings & self.promoted)
-        else:
-            return super()._transposition_key()
-
-    def board_fen(self, *, promoted: Optional[bool] = None) -> str:
-        if promoted is None:
-            promoted = self.has_chess960_castling_rights()
-        return super().board_fen(promoted=promoted)
+    def _effective_promoted(self) -> chess.Bitboard:
+        return self.kings & self.promoted if self.castling_rights else chess.BB_EMPTY
 
     def status(self) -> chess.Status:
         status = super().status()
@@ -261,9 +253,9 @@ def _push_capture(self, move: chess.Move, capture_square: chess.Square, piece_ty
 
         # Destroy castling rights.
         self.castling_rights &= ~explosion_radius
-        if explosion_radius & self.kings & self.occupied_co[chess.WHITE] & ~self.promoted:
+        if explosion_radius & self.kings & self.occupied_co[chess.WHITE] & ~self._effective_promoted():
             self.castling_rights &= ~chess.BB_RANK_1
-        if explosion_radius & self.kings & self.occupied_co[chess.BLACK] & ~self.promoted:
+        if explosion_radius & self.kings & self.occupied_co[chess.BLACK] & ~self._effective_promoted():
             self.castling_rights &= ~chess.BB_RANK_8
 
         # Explode the capturing piece.
@@ -930,9 +922,11 @@ def _is_halfmoves(self, n: int) -> bool:
     def is_irreversible(self, move: chess.Move) -> bool:
         return self._reduces_castling_rights(move)
 
+    def _effective_promoted(self) -> chess.Bitboard:
+        return self.promoted & ~self.kings & ~self.pawns
+
     def _transposition_key(self) -> Hashable:
         return (super()._transposition_key(),
-                self.promoted,
                 str(self.pockets[chess.WHITE]), str(self.pockets[chess.BLACK]))
 
     def legal_drop_squares_mask(self) -> chess.Bitboard:
@@ -1009,7 +1003,7 @@ def has_insufficient_material(self, color: chess.Color) -> bool:
         # a different color complex.
         return (
             chess.popcount(self.occupied) + sum(len(pocket) for pocket in self.pockets) <= 3 and
-            not self.promoted and
+            not self._effective_promoted() and
             not self.pawns and
             not self.rooks and
             not self.queens and
@@ -1041,11 +1035,6 @@ def set_fen(self, fen: str) -> None:
         self.pockets[chess.WHITE] = white_pocket
         self.pockets[chess.BLACK] = black_pocket
 
-    def board_fen(self, *, promoted: Optional[bool] = None) -> str:
-        if promoted is None:
-            promoted = True
-        return super().board_fen(promoted=promoted)
-
     def epd(self, shredder: bool = False, en_passant: chess.EnPassantSpec = "legal", promoted: Optional[bool] = None, **operations: Union[None, str, int, float, chess.Move, Iterable[chess.Move]]) -> str:
         epd = super().epd(shredder=shredder, en_passant=en_passant, promoted=promoted)
         board_part, info_part = epd.split(" ", 1)

From fc50a27fa3cfa07243f78eca93ea6126347ea1fa Mon Sep 17 00:00:00 2001
From: Christopher Akiki 
Date: Fri, 13 Mar 2026 17:49:05 +0100
Subject: [PATCH 610/613] [MINOR:TYPO] Update pgn.py

instanciate -> instantiate
---
 chess/pgn.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chess/pgn.py b/chess/pgn.py
index f40980d48..5ae5b43b0 100644
--- a/chess/pgn.py
+++ b/chess/pgn.py
@@ -402,7 +402,7 @@ def remove_variation(self, move: Union[int, chess.Move, GameNode]) -> None:
 
     def add_variation(self, move: chess.Move, *, comment: Union[str, list[str]] = "", starting_comment: Union[str, list[str]] = "", nags: Iterable[int] = []) -> ChildNode:
         """Creates a child node with the given attributes."""
-        # Instanciate ChildNode only in this method.
+        # Instantiate ChildNode only in this method.
         return ChildNode(self, move, comment=comment, starting_comment=starting_comment, nags=nags)
 
     def add_main_variation(self, move: chess.Move, *, comment: str = "", nags: Iterable[int] = []) -> ChildNode:

From 5e2a2bc153b7646497f3e811f3cfd28aaca1b1ea Mon Sep 17 00:00:00 2001
From: Cady 
Date: Mon, 30 Mar 2026 16:21:49 -0400
Subject: [PATCH 611/613] Fixed typo in README.rst, issue 1183

---
 README.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.rst b/README.rst
index a6c3185c6..d4d51a128 100644
--- a/README.rst
+++ b/README.rst
@@ -314,7 +314,7 @@ If you like, share interesting things you are using python-chess for, for exampl
 | .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/clente-chess.png?raw=true | `clente/chess `_                                            |
 |     :height: 64                                                                                      |                                                                                              |
 |     :width: 64                                                                                       |                                                                                              |
-|     :target: https://github.com/clente/chess                                                         | Oppinionated wrapper to use python-chess from the R programming language                     |
+|     :target: https://github.com/clente/chess                                                         | Opinionated wrapper to use python-chess from the R programming language                     |
 +------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------------+
 | .. image:: https://github.com/niklasf/python-chess/blob/master/docs/images/crazyara.png?raw=true     | https://crazyara.org/                                                                        |
 |     :height: 64                                                                                      |                                                                                              |

From efb8b4278c85e0145b29b867de03dc715456dd86 Mon Sep 17 00:00:00 2001
From: Litschi 
Date: Fri, 27 Mar 2026 19:31:11 +0100
Subject: [PATCH 612/613] feat: added piece_count function instead of
 chess.popcount(board.occupied)

---
 CHANGELOG.rst     |  9 +++++++++
 chess/__init__.py |  3 +++
 chess/gaviota.py  |  8 ++++----
 chess/syzygy.py   | 10 +++++-----
 test.py           |  2 +-
 5 files changed, 22 insertions(+), 10 deletions(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 03a9555d1..212db89b1 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,15 @@
 Changelog for python-chess
 ==========================
 
+New in unreleased (27th Mar 2026)
+---------------------------------
+
+Bugfixes:
+* Fixed typo in README.rst.
+
+Changes:
+* Added ``board.piece_count`` function.
+
 New in v1.11.2 (25th Feb 2025)
 ------------------------------
 
diff --git a/chess/__init__.py b/chess/__init__.py
index 7fe4cb9cc..12b249bd5 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -841,6 +841,9 @@ def clear_board(self) -> None:
         :class:`~chess.Board` also clears the move stack.
         """
         self._clear_board()
+    
+    def piece_count(self) -> int:
+        return popcount(self.occupied)
 
     def pieces_mask(self, piece_type: PieceType, color: Color) -> Bitboard:
         if piece_type == PAWN:
diff --git a/chess/gaviota.py b/chess/gaviota.py
index 8beb18d4d..7152a18f0 100644
--- a/chess/gaviota.py
+++ b/chess/gaviota.py
@@ -1519,8 +1519,8 @@ def probe_dtm(self, board: chess.Board) -> int:
             raise KeyError(f"gaviota tables do not contain positions with castling rights: {board.fen()}")
 
         # Supports only up to 5 pieces.
-        if chess.popcount(board.occupied) > 5:
-            raise KeyError(f"gaviota tables support up to 5 pieces, not {chess.popcount(board.occupied)}: {board.fen()}")
+        if board.piece_count() > 5:
+            raise KeyError(f"gaviota tables support up to 5 pieces, not {board.piece_count()}: {board.fen()}")
 
         # KvK is a draw.
         if board.occupied == board.kings:
@@ -1885,8 +1885,8 @@ def _probe_hard(self, board: chess.Board, wdl_only: bool = False) -> int:
         if board.castling_rights:
             raise KeyError(f"gaviota tables do not contain positions with castling rights: {board.fen()}")
 
-        if chess.popcount(board.occupied) > 5:
-            raise KeyError(f"gaviota tables support up to 5 pieces, not {chess.popcount(board.occupied)}: {board.fen()}")
+        if board.piece_count() > 5:
+            raise KeyError(f"gaviota tables support up to 5 pieces, not {board.piece_count()}: {board.fen()}")
 
         stm = ctypes.c_uint(0 if board.turn == chess.WHITE else 1)
         ep_square = ctypes.c_uint(board.ep_square if board.ep_square else 64)
diff --git a/chess/syzygy.py b/chess/syzygy.py
index 0c6b7822c..2250db5b5 100644
--- a/chess/syzygy.py
+++ b/chess/syzygy.py
@@ -1548,8 +1548,8 @@ def probe_wdl_table(self, board: chess.Board) -> int:
         try:
             table = typing.cast(WdlTable, self.wdl[key])
         except KeyError:
-            if chess.popcount(board.occupied) > TBPIECES:
-                raise KeyError(f"syzygy tables support up to {TBPIECES} pieces, not {chess.popcount(board.occupied)}: {board.fen()}")
+            if board.piece_count() > TBPIECES:
+                raise KeyError(f"syzygy tables support up to {TBPIECES} pieces, not {board.piece_count()}: {board.fen()}")
             raise MissingTableError(f"did not find wdl table {key}")
 
         self._bump_lru(table)
@@ -1567,8 +1567,8 @@ def probe_ab(self, board: chess.Board, alpha: int, beta: int, threats: bool = Fa
         # positions that have more pieces than the maximum number of supported
         # pieces. We artificially limit this to one additional level, to
         # make sure search remains somewhat bounded.
-        if chess.popcount(board.occupied) > TBPIECES + 1:
-            raise KeyError(f"syzygy tables support up to {TBPIECES} pieces, not {chess.popcount(board.occupied)}: {board.fen()}")
+        if board.piece_count() > TBPIECES + 1:
+            raise KeyError(f"syzygy tables support up to {TBPIECES} pieces, not {board.piece_count()}: {board.fen()}")
 
         # Special case: Variant with compulsory captures.
         if self.variant.captures_compulsory:
@@ -1613,7 +1613,7 @@ def sprobe_ab(self, board: chess.Board, alpha: int, beta: int, threats: bool = F
 
         threats_found = False
 
-        if threats or chess.popcount(board.occupied) >= 6:
+        if threats or board.piece_count() >= 6:
             for threat in board.generate_legal_moves(~board.pawns):
                 board.push(threat)
                 try:
diff --git a/test.py b/test.py
index 4927a2b80..228c62f3f 100755
--- a/test.py
+++ b/test.py
@@ -1220,7 +1220,7 @@ def test_clear(self):
         self.assertFalse(board.ep_square)
 
         self.assertFalse(board.piece_at(chess.E1))
-        self.assertEqual(chess.popcount(board.occupied), 0)
+        self.assertEqual(board.piece_count(), 0)
 
     def test_threefold_repetition(self):
         board = chess.Board()

From a345dbd131fb5cbcbffdc9e50901d359480926c5 Mon Sep 17 00:00:00 2001
From: Niklas Fiekas 
Date: Fri, 3 Apr 2026 21:24:06 +0200
Subject: [PATCH 613/613] Document board.piece_count()

---
 CHANGELOG.rst     | 9 ---------
 chess/__init__.py | 7 ++++++-
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 212db89b1..03a9555d1 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,15 +1,6 @@
 Changelog for python-chess
 ==========================
 
-New in unreleased (27th Mar 2026)
----------------------------------
-
-Bugfixes:
-* Fixed typo in README.rst.
-
-Changes:
-* Added ``board.piece_count`` function.
-
 New in v1.11.2 (25th Feb 2025)
 ------------------------------
 
diff --git a/chess/__init__.py b/chess/__init__.py
index 12b249bd5..9ea44f36e 100644
--- a/chess/__init__.py
+++ b/chess/__init__.py
@@ -841,8 +841,13 @@ def clear_board(self) -> None:
         :class:`~chess.Board` also clears the move stack.
         """
         self._clear_board()
-    
+
     def piece_count(self) -> int:
+        """
+        Gets the number of pieces on the board.
+
+        Does not include Crazyhouse pockets.
+        """
         return popcount(self.occupied)
 
     def pieces_mask(self, piece_type: PieceType, color: Color) -> Bitboard: