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First solution in Clear category for Pawn Brotherhood by Crachton
def safe_pawns(pawns):
count_safe = 0
for p in pawns:
x, y = list(p)
h, v1, v2 = int(y) - 1, chr(ord(x) - 1), chr(ord(x) + 1)
for v in [v1, v2]:
c = '%s%d' % (v, h)
if c in pawns and h > 0 and v >= 'a' and v <= 'h':
count_safe += 1
break
return count_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
April 27, 2017