def random_with_first_level_search(self, board: chess.Board):
moves = list(board.legal_moves)
best_move = random.sample(moves, 1)[0]
best_move_value = 0
for move in moves:
board.push(move)
if board.is_checkmate():
move_value = 100
if move_value > best_move_value:
best_move = move
board.pop()
if board.is_into_check(move):
move_value = 90
if move_value > best_move_value:
best_move = move
if board.is_capture(move):
move_value = 80
if move_value > best_move_value:
best_move = move
if board.is_castling(move):
move_value = 70
if move_value > best_move_value:
best_move = move
return best_move
def is_illegal_castle(board: chess.Board, move: chess.Move) -> bool:
if not board.is_castling(move):
return False
# illegal without kingside rights
if board.is_kingside_castling(move) and not board.has_kingside_castling_rights(board.turn):
return True
# illegal without queenside rights
if board.is_queenside_castling(move) and not board.has_queenside_castling_rights(board.turn):
return True
# illegal if any pieces are between king & rook
rook_square = chess.square(7 if board.is_kingside_castling(move) else 0, chess.square_rank(move.from_square))
between_squares = chess.SquareSet(chess.between(move.from_square, rook_square))
if any(map(lambda s: board.piece_at(s), between_squares)):
return True
# its legal
return False
def is_psuedo_legal_castle(board: chess.Board, move: chess.Move):
return board.is_castling(move) and not is_illegal_castle(board, move)