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First solution in Clear category for Pawn Brotherhood by wojtek96
def safe_pawns(pawns):
count = 0
for i in pawns:
col, row = list(i)
if row == 1:
continue
if 'a' not in col:
if chr(ord(col)-1) + str(int(row)-1) in pawns:
count=count+1
continue
if 'h' not in col:
if chr(ord(col)+1) + str(int(row)-1) in pawns:
count=count+1
return count
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
Dec. 15, 2016