def calculate_legal_moves(self, board):
legal_moves = []
piece_position = board.index(self)
for current_offset in self.CANDIDATE_MOVE_COORDINATES:
destination_coordinate = piece_position + (self.direction *
current_offset)
if not is_valid_tile_coordinate(destination_coordinate):
continue
if current_offset == 8 and not self.is_tile_occupied(
board, destination_coordinate):
# TODO: PAWN promotion square
legal_moves.append(destination_coordinate)
# # TODO: ADD first move check (maybe not needed because of row check)
elif current_offset == 16 and \
(piece_is_in_given_row(piece_position, 6) and self.color == WHITE or
piece_is_in_given_row(piece_position, 1) and self.color == BLACK):
behind_candidate_destination_coordinate = piece_position + (
self.direction * 8)
if not self.is_tile_occupied(board, behind_candidate_destination_coordinate) and \
not self.is_tile_occupied(board, destination_coordinate):
legal_moves.append(destination_coordinate)
elif current_offset == 7 and not \
(piece_is_in_given_column(piece_position, 7) and self.color == WHITE or
piece_is_in_given_column(piece_position, 0) and self.color == BLACK):
if self.is_tile_occupied(board, destination_coordinate):
piece_on_candidate = board[destination_coordinate]
if self.color != piece_on_candidate.color:
# TODO: Add promotion square
legal_moves.append(destination_coordinate)
# elif TODO: Add enpassantPawn
elif current_offset == 9 and not \
(piece_is_in_given_column(piece_position, 0) and self.color == WHITE or
piece_is_in_given_column(piece_position, 7) and self.color == BLACK):
if self.is_tile_occupied(board, destination_coordinate):
piece_on_candidate = board[destination_coordinate]
if self.color != piece_on_candidate.color:
# TODO: Add promotion square
legal_moves.append(destination_coordinate)
# elif TODO: Add enpassantPawn
return legal_moves
def __is_eight_column_exclusion(self, current_position, candidate_offset):
return piece_is_in_given_column(
current_position,
7) and (candidate_offset == -15 or candidate_offset == -6
or candidate_offset == 10 or candidate_offset == 17)
def __is_seventh_column_exclusion(self, current_position,
candidate_offset):
return piece_is_in_given_column(current_position,
6) and (candidate_offset == -6
or candidate_offset == 10)
def __is_second_column_exclusion(self, current_position, candidate_offset):
return piece_is_in_given_column(current_position,
1) and (candidate_offset == -10
or candidate_offset == 6)
def __is_first_column_exclusion(self, current_position, candidate_offset):
return piece_is_in_given_column(
current_position,
0) and (candidate_offset == -17 or candidate_offset == -10
or candidate_offset == 6 or candidate_offset == 15)
