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Losing chess [a] is one of the most popular chess variants. [1] [2] The objective of each player is to lose all of their pieces or be stalemated, that is, a misère version. In some variations, a player may also win by checkmating or by being checkmated. Losing chess was weakly solved in 2016 by Mark Watkins as a win for White, beginning with 1.e3.
On certain Internet chess servers, such as Chess.com and Lichess, this kind of move is marked as an "inaccuracy", denoting a weak move, appearing more regularly than with most annotators. A sacrifice leading to a dangerous attack that the opponent should be able to defend against if they play well may receive a "?!".
This variation goes against ancient dogma which states that knights are not well placed on the rim; however, extra pressure is brought to bear against the Achilles Heel of the fianchetto lines—the weakness at c4. Hundreds of master games have continued with 9.Nd2 c5 10.Qc2 Rb8 11.b3 b5 12.Bb2 bxc4 13.bxc4 Bh6 14.f4 (14.e3 Bf5 is a trap that ...
This glossary of chess explains commonly used terms in chess, in alphabetical order.Some of these terms have their own pages, like fork and pin.For a list of unorthodox chess pieces, see Fairy chess piece; for a list of terms specific to chess problems, see Glossary of chess problems; for a list of named opening lines, see List of chess openings; for a list of chess-related games, see List of ...
The first use of the joke opening in a FIDE-rated game between top grandmasters occurred during the Chess.com Global Championship finals in November 2022, which was an in-person rapid event played on Chess.com. Trailing 3–0 in his knockout match against Hikaru Nakamura, Polish GM Jan-Krzysztof Duda played 1.e3 and 2.Ke2. Duda lost the game ...
A chess rating system is a system used in chess to estimate the strength of a player, based on their performance versus other players. They are used by organizations such as FIDE, the US Chess Federation (USCF or US Chess), International Correspondence Chess Federation, and the English Chess Federation. Most of the systems are used to ...
For infinite chess, it has been found that the mate-in-n problem is decidable; that is, given a natural number n and a player to move and the positions (such as on ) of a finite number of chess pieces that are uniformly mobile and with constant and linear freedom, there is an algorithm that will answer if there is a forced checkmate in at most n moves. [11]
Not all chess games reach an endgame; some of them end earlier. All chess positions with up to seven pieces on the board have been solved by endgame tablebases , [ 2 ] so the outcome (win, loss, or draw) of best play by both sides in such positions is known, and endgame textbooks teach this best play.