The fifty-move rule in chess states that if fifty consecutive moves are made by both players without a pawn being moved or a piece being captured, either player can claim a draw. This rule is in place to prevent endless games with no progress, often in situations where the players have very few pieces left and no clear way to force a checkmate. The count resets whenever a pawn is moved or a capture is made. This rule ensures that games are concluded in a reasonable amount of time.

英語での「fifty-move rule」の定義と意味

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