39 lines
1.0 KiB
Python
39 lines
1.0 KiB
Python
import chess
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import chess.engine
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import os
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from chesspp.i_strategy import IStrategy
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from chesspp.eval import score_lc0
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_DIR = os.path.abspath(os.path.dirname(__file__))
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class Lc0Strategy(IStrategy):
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def __init__(self, path="lc0/lc0", rollout_depth: int = 4,
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limit: chess.engine.Limit = chess.engine.Limit(depth=4)):
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super().__init__(rollout_depth)
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self._lc0 = None
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self.path = path
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self.limit = limit
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def __del__(self):
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if self._lc0 is not None:
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self._lc0.quit()
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@property
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def lc0(self) -> chess.engine.SimpleEngine:
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if self._lc0 is None:
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self._lc0 = self.lc0 = chess.engine.SimpleEngine.popen_uci(self.path)
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return self._lc0
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@lc0.setter
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def lc0(self, value):
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self._lc0 = value
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def pick_next_move(self, board: chess.Board) -> chess.Move | None:
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return self.lc0.play(board, self.limit).move
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def analyze_board(self, board: chess.Board) -> int:
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score = score_lc0(board, self.lc0)
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return score
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