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First solution in Clear category for Pawn Brotherhood by Mycroft0121
def safe_pawns(pawns: set) -> int:
index = [(int(p[1]),ord(p[0])-96) for p in pawns]
safe = [(x[0]-1,x[1]-1) in index or (x[0]-1,x[1]+1) in index for x in index]
return sum(safe)
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!")
March 23, 2019