Difference between revisions of "Irreversible Moves"
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'''[[Main Page|Home]] * [[Chess]] * [[Moves]] * Irreversible Moves''' | '''[[Main Page|Home]] * [[Chess]] * [[Moves]] * Irreversible Moves''' | ||
| − | '''Irreversible Moves''' can not be reversed. Thus, they are either [[Captures|captures]] or [[Pawn Push|pawn moves]] <ref>including [[Promotions|promotions]]</ref>. [[Make Move|Making]] those irreversible moves, resets the [[Halfmove Clock|halfmove clock]] inside a [[Chess Position|position]] object to zero, concerning the [[Fifty-move Rule|fifty-move rule]]. [[Quiet Moves|Quiet]] and otherwise [[Reversible Moves|reversible moves]], which lose the [[Castling Rights|castling rights]], that is [[Rook|rook]]- and [[King|king]]-moves from their initial [[Squares|square]], including [[Castling|castling]] itself, are irreversible in the sense to reverse the same rights - since once a castling right is lost, it is lost forever, and reset the position index to determine [[Repetitions#RepetitionOfPositions|repetition of positions]]. However, those "irreversible" moves don't reset, but increment the halfmove clock <ref>[http://www.open-chess.org/viewtopic.php?f=3&t=2209 Half Move Clock Confusion] by HumbleProgrammer, [[Computer Chess Forums|OpenChess Forum]], January 10, 2013</ref> <ref>[http://www.horst-wandersleben.de/Wette.htm Computerschach - Eine Wette, die ich gerne verloren habe] by [[Horst Wandersleben]</ref>. | + | '''Irreversible Moves''' can not be reversed. Thus, they are either [[Captures|captures]] or [[Pawn Push|pawn moves]] <ref>including [[Promotions|promotions]]</ref>. [[Make Move|Making]] those irreversible moves, resets the [[Halfmove Clock|halfmove clock]] inside a [[Chess Position|position]] object to zero, concerning the [[Fifty-move Rule|fifty-move rule]]. [[Quiet Moves|Quiet]] and otherwise [[Reversible Moves|reversible moves]], which lose the [[Castling Rights|castling rights]], that is [[Rook|rook]]- and [[King|king]]-moves from their initial [[Squares|square]], including [[Castling|castling]] itself, are irreversible in the sense to reverse the same rights - since once a castling right is lost, it is lost forever, and reset the position index to determine [[Repetitions#RepetitionOfPositions|repetition of positions]]. However, those "irreversible" moves don't reset, but increment the halfmove clock <ref>[http://www.open-chess.org/viewtopic.php?f=3&t=2209 Half Move Clock Confusion] by HumbleProgrammer, [[Computer Chess Forums|OpenChess Forum]], January 10, 2013</ref> <ref>[http://www.horst-wandersleben.de/Wette.htm Computerschach - Eine Wette, die ich gerne verloren habe] by [[Horst Wandersleben]]</ref>. |
=See also= | =See also= | ||
Latest revision as of 11:45, 22 September 2018
Home * Chess * Moves * Irreversible Moves
Irreversible Moves can not be reversed. Thus, they are either captures or pawn moves [1]. Making those irreversible moves, resets the halfmove clock inside a position object to zero, concerning the fifty-move rule. Quiet and otherwise reversible moves, which lose the castling rights, that is rook- and king-moves from their initial square, including castling itself, are irreversible in the sense to reverse the same rights - since once a castling right is lost, it is lost forever, and reset the position index to determine repetition of positions. However, those "irreversible" moves don't reset, but increment the halfmove clock [2] [3].
See also
External Links
- Irreversible (disambiguation) from Wikipedia
- Irreversible process from Wikipedia
- Point of no return from Wikipedia
- Computerschach - Eine Wette, die ich gerne verloren habe by Horst Wandersleben (German) [4]
References
- ↑ including promotions
- ↑ Half Move Clock Confusion by HumbleProgrammer, OpenChess Forum, January 10, 2013
- ↑ Computerschach - Eine Wette, die ich gerne verloren habe by Horst Wandersleben
- ↑ Dieter Bürßner found a game finished in a fifty-move rule draw, where castling occurred during the last fifty moves
