Changes

'''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>.