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'''[[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>.
=See also=
* [[Fifty-move Rule]]
* [[Halfmove Clock]]
* [[Reversible Moves]]
=External Links=
* [https://en.wikipedia.org/wiki/Irreversible Irreversible (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Irreversible_process Irreversible process from Wikipedia]
* [https://en.wikipedia.org/wiki/Point_of_no_return Point of no return from Wikipedia]
=References=
<references />
'''[[Moves|Up one Level]]'''
'''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>.
=See also=
* [[Fifty-move Rule]]
* [[Halfmove Clock]]
* [[Reversible Moves]]
=External Links=
* [https://en.wikipedia.org/wiki/Irreversible Irreversible (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Irreversible_process Irreversible process from Wikipedia]
* [https://en.wikipedia.org/wiki/Point_of_no_return Point of no return from Wikipedia]
=References=
<references />
'''[[Moves|Up one Level]]'''
