Halfmove+Clock

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The **Halfmove Clock** inside an chess position object takes care of enforcing the fifty-move rule. This counter is **reset** after captures or pawn moves, and incremented otherwise. Also moves which lose the castling rights, that is rook- and king moves from their initial squares, including castling itself, **increment** the Halfmove Clock. However, those moves are irreversible in the sense to reverse the same rights - since once a castling right is lost, it is lost forever, as considered in detecting repetitions.

=See also=
 * Fifty-move Rule
 * Halfmove Clock in the Forsyth-Edwards Notation
 * Ply
 * Repetitions

=Forum Posts=
 * [|Half Move Clock Confusion] by HumbleProgrammer, OpenChess Forum, January 10, 2013 » Fifty-move Rule, Repetitions
 * [|Fifty move counter and Null move] by Tamás Kuzmics, CCC, August 09, 2017 » Fifty-move Rule, Null Move Pruning

=External Links=
 * [|plycount - Wiktionary]
 * [|Counter from Wikipedia]
 * [|Clock (disambiguation) from Wikipedia]
 * [|Clock from Wikipedia]
 * [|Game clock from Wikipedia]

=What links here?= include page="Halfmove Clock" component="backlinks" limit="40"
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