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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.
There is no longer a rule defining perpetual check—a situation in which one player gives a series of checks from which the other player cannot escape—as a draw. Any perpetual check situation will eventually be claimable as a draw under the threefold repetition rule or the fifty-move rule; more commonly the players will simply agree a draw. [4]
The result is a draw. However, a fourfold repetition with perpetual checks is illegal, and results not in a draw but in a loss by the checking player. In Xiangqi, rules about repetitions vary between different sets of rules, but generally perpetual attacks , including perpetual check, perpetual threatmate, and perpetual chase, are forbidden.
Some attacks involve numerous checks to force an opponent into a losing position, especially when the king is exposed. Some uses of checking: Repetitive checking to prevent losing the game (draw by perpetual check) Royal fork (fork of the king and queen) or other forks involving the king; Forcing an exchange; Preventing castling by forcing the ...
Threefold repetition – if the same position has occurred three times with the same player to move, a player may claim a draw. Perpetual check – situation in which one king cannot escape an endless series of checks but cannot be checkmated. This was formerly a rule of chess to result in a draw, and still used informally, but superseded by ...
A draw is possible in a few exceptional positions if the weaker side has an immediate perpetual check, e.g. with a white king on a1 and white queens on a2 and b1, the black king on e8, and the black queen giving check on d4. Black has an unlimited supply of checks on d4, a4, and d1, and the white king cannot escape the corner.
Perpetual Limited ( ASX:PPT ) is about to trade ex-dividend in the next four days. The ex-dividend date is one business...
Perpetual check (連続王手の千日手) is an illegal move (see above), which ends the game in a loss in tournament play. In professional shogi, a repetition draw outcome is not a final result as draws essentially do not count. Each game can only end in either a win or loss.