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First solution in Clear category for Pawn Brotherhood by Kverde
def dec_c(char):
return chr(ord(char) - 1)
def inc_c(char):
return chr(ord(char) + 1)
def get_defeners(pawn):
x, y = pawn
if y == '1':
return
if x < 'h':
yield inc_c(x) + dec_c(y)
if x > 'a':
yield dec_c(x) + dec_c(y)
def is_safe(pawn, pawns):
for defender in get_defeners(pawn):
if defender in pawns:
return True
return False
def safe_pawns(pawns: set) -> int:
return sum(is_safe(pawn, pawns) for pawn in pawns)
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!")
Aug. 8, 2022