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First solution in Clear category for Pawn Brotherhood by Kurush
def safe_pawns(pawns: set) -> int:
dict_coor = dict(zip('abcdefgh', range(8)))
pawns = [(int(elem[1]) - 1, dict_coor[elem[0]]) for elem in pawns]
cnt = 0
for pawn in pawns:
if (pawn[0] - 1, pawn[1] + 1) in pawns or (pawn[0] - 1, pawn[1] - 1) in pawns: cnt += 1
return cnt
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!")
Feb. 28, 2019