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a rule that occurs when the same position on the board occurs three times with the same player to move, or if the same sequence of moves occurs three times with the same player to move, resulting in a draw or stalemate
What is "threefold repetition"?
Threefold repetition is a rule in chess where the game can be declared a draw if the same position occurs three times with the same player to move and all possible moves remaining the same. This can happen at different points in the game, and the repetitions do not need to be consecutive. The player who wishes to claim a draw due to threefold repetition must make the claim before making their next move. This rule is in place to prevent endless cycles of moves without progress toward checkmate.
