为Move类增加__hash__方法

Author: windshadow233

cchess/__init__.py

@@ -568,7 +568,7 @@ def from_unicode(cls, unicode: str):
         return cls.from_symbol(UNICODE_TO_PIECE_SYMBOLS[unicode])
 
 
-@dataclasses.dataclass(unsafe_hash=True)
+@dataclasses.dataclass
 class Move:
     def __init__(self, from_square: Square, to_square: Square):
         assert from_square in SQUARES, f"from_square out of range: {from_square!r}"
@@ -614,6 +614,9 @@ def __bool__(self):
     def null(cls):
         return cls(0, 0)
 
+    def __hash__(self):
+        return hash((self.from_square, self.to_square))
+
 
 class BaseBoard:
     def __init__(self, board_fen: Optional[str] = STARTING_BOARD_FEN):