By Zhao Kun Peng

pythonkd · pythonkd · commit f35415e78279 · 2018-09-08T15:55:43.000+08:00
diff --git a/checkio/pawns.py b/checkio/pawns.py
@@ -0,0 +1,18 @@
+def safe_pawns(pawns: set) -> int:
+    t=[]
+    s=filter(judge,pawns)
+    for i in s:
+        if chr(ord(i[0])+1)+str(int(i[1])-1)  in pawns:
+            t.append(i)
+        elif chr(ord(i[0])-1)+str(int(i[1])-1) in pawns:
+            t.append(i)
+    return len(t)
+def judge(n):
+    if int(n[1]) == 1:
+        return False
+    return True
+if __name__ == '__main__':
+    #These "asserts" using only for self-checking and not necessary for auto-testing
+    assert safe_pawns({"b4", "d4", "f4", "c3", "e3", "g5", "d2"}) == 6
+    assert safe_pawns({"b4", "c4", "d4", "e4", "f4", "g4", "e5"}) == 1
+    print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")
