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Doesn't bounds check for putative guards solution in Clear category for Pawn Brotherhood by cptxlnt
def safe_pawns(pawns: set) -> int:
# ok, safe means another pawn is at row-1 and offset by one letter
# don't need to check if the guarding pawn is in a legitimate square
safepawns=0
for pawn in pawns:
col,row=list(pawn)
row=int(row)
guards=[]
guards.append(chr(ord(col)-1)+str(row-1))
guards.append(chr(ord(col)+1)+str(row-1))
if any(guard in pawns for guard in guards):
safepawns+=1
return safepawns
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 16, 2019
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