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First solution in Clear category for Pawn Brotherhood by shasa.gimblett
def safe_pawns(pawns):
pawn_indices = set()
for p in pawns:
row = int(p[1]) - 1
col = ord(p[0]) - 97
pawn_indices.add((row, col))
count = 0
for row, col in pawn_indices:
is_safe = ((row-1,col-1) in pawn_indices) or ((row-1,col+1) in pawn_indices)
if is_safe:
count += 1
return count
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
Oct. 29, 2016
