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In chess, the threefold repetition rule states that a player may claim a draw if the same position occurs three times during the game. The rule is also known as repetition of position and, in the USCF rules, as triple occurrence of position . [ 1 ]
In chess, there are a number of ways that a game can end in a draw, neither player winning.Draws are codified by various rules of chess including stalemate (when the player to move is not in check but has no legal move), threefold repetition (when the same position occurs three times with the same player to move), and the fifty-move rule (when the last fifty successive moves made by both ...
The threefold repetition rule was added, although at some times up to six repetitions have been required, and the exact conditions have been specified more clearly (see Threefold repetition § History of the rule). The fifty-move rule was also added. At various times, the number of moves required was different, such as 24, 60, 70, or 75.
A draw by perpetual check used to be in the rules of chess. [15] [16] Howard Staunton gave it as one of six ways to draw a game in The Chess-Player's Handbook. [17] It has since been removed because perpetual check will eventually allow a draw claim by either threefold repetition or the fifty-move rule.
During the World Blitz Chess Championship 2022, a match between Richárd Rapport with white, and Nakamura with black, ended in a Berlin Draw that took just 36 seconds from first move to the threefold repetition. It would have taken just 20 seconds if not for Rapport thinking for 16 seconds to decide to enter the drawing line before castling on ...
Threefold repetition: This most commonly occurs when neither side is able to avoid repeating moves without incurring a disadvantage. The three occurrences of the position need not occur on consecutive moves for a claim to be valid.
The other ways that a game can end in a draw are by stalemate, by a dead position, by the threefold repetition rule, by the fifty-move rule, by the fivefold repetition rule and by the seventy-five-move rule. A position is said to be a draw (or a "drawn position" or "theoretical draw") if either player can, through correct play, eventually force ...
More recently, correspondence chess grandmaster Arno Nickel has also favoured this idea and tested it in correspondence play: [21] a form of it, giving a ¾–¼ result for stalemate only, has even been rated by FIDE. [19] Kaufman and Nickel advocate extending Lasker's idea to scoring threefold repetition as ¾–¼ as well. [19]