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First solution in Clear category for Pawn Brotherhood by laserpez
def safe_pawns(pawns):
nextchr = lambda c: chr(ord(c) + 1)
prevchr = lambda c: chr(ord(c) - 1)
safe = 0
for current in pawns:
c, r = current[0], int(current[1])
for other in (pawns - {current}):
c_o, r_o = other[0], int(other[1])
if r_o == r - 1 and c_o in (nextchr(c), prevchr(c)):
safe += 1
break
return 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
Dec. 27, 2014
