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In the position diagrammed, from the game Carlos Torre–Emanuel Lasker, Moscow 1925, [3] White sacrifices his queen in order to set up the windmill: . 25. Bf6!!. Black must accept the sacrifice, as his own queen is unprotected, 25...g5 26.Qxh6 leads to unstoppable mate on g7 or h8, and any other attempt to stop the windmill would simply give White the queen.
While a chess puzzle is any puzzle involving aspects of chess, a chess problem is an arranged position with a specific task to be fulfilled, such as White mates in n moves. Chess problems are also known as chess compositions because the positions are specially devised, rather than arising from actual games. Chess problems are divided into ...
Richard Réti. The Réti endgame study is a chess endgame study by Richard Réti.It was published in 1921 in Kagans Neueste Schachnachrichten.It demonstrates how a king can make multiple threats and how it can take more than one path to a given location, using the same number of moves.
Cylinder chess: Played on a cylinder board with a- and h-files "connected". Thus a player can use them as if the a-file were next to the h-file (and vice versa). Infinite chess: Numerous players and mathematicians have conceived of chess variations played on an unbounded chessboard. [84]
Lichess (/ ˈ l iː tʃ ɛ s /; LEE-ches) [3] [4] is a free and open-source Internet chess server run by a non-profit organization of the same name. Users of the site can play online chess anonymously and optionally register an account to play rated games.
A variant first described by Claude Shannon provides an argument about the game-theoretic value of chess: he proposes allowing the move of “pass”. In this variant, it is provable with a strategy stealing argument that the first player has at least a draw thus: if the first player has a winning move in the initial position, let him play it, else pass.
A fork is an example of a double attack.The type of fork is named after the type of forking piece. For example, a fork by a knight is a knight fork.The attacked pieces are forked. [1]