austindavis commited on
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Create src/modeling/chess_utils.py

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  1. src/modeling/chess_utils.py +62 -0
src/modeling/chess_utils.py ADDED
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+ from typing import Any, Callable, Iterable, List, Union
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+
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+ import chess
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+
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+
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+ def uci_to_board(
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+ uci_moves: Union[str, Iterable],
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+ *,
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+ force=False,
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+ fail_silent=False,
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+ verbose=True,
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+ as_board_stack=False,
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+ map_function: Callable = lambda x: x,
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+ reset_halfmove_clock = False,
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+ ) -> Union[chess.Board, List[Union[chess.Board, Any]]]:
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+ """Returns a chess.Board object from a string of UCI moves
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+ Params:
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+ force: If true, illegal moves are forcefully made. O/w, the rror is thrown
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+ verbose: Alert user via prints that illegal moves were attempted."""
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+ board = chess.Board()
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+ forced_moves = []
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+ did_force = False
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+ board_stack = [map_function(board.copy())]
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+
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+ if isinstance(uci_moves, str):
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+ uci_moves = uci_moves.split(" ")
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+
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+ for i, move in enumerate(uci_moves):
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+ try:
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+ move_obj = board.parse_uci(move)
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+ if reset_halfmove_clock:
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+ board.halfmove_clock = 0
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+ board.push(move_obj)
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+ except (chess.IllegalMoveError, chess.InvalidMoveError) as ex:
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+ if force:
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+ did_force = True
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+ forced_moves.append((i, move))
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+ piece = board.piece_at(chess.parse_square(move[:2]))
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+ board.set_piece_at(chess.parse_square(move[:2]), None)
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+ board.set_piece_at(chess.parse_square(move[2:4]), piece)
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+ elif fail_silent:
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+ if as_board_stack:
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+ return board_stack
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+ else:
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+ return map_function(board)
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+ else:
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+ if verbose:
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+ print(f"Failed on (move_id, uci): ({i},{move})")
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+ if as_board_stack:
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+ return board_stack
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+ else:
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+ return map_function(board)
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+ else:
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+ raise ex
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+ board_stack.append(map_function(board.copy()))
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+ if verbose and did_force:
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+ print(f"Forced (move_id, uci): {forced_moves}")
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+
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+ if as_board_stack:
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+ return board_stack
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+ else:
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+ return map_function(board)