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In chess, a tactic is a sequence of moves that each makes one or more immediate threats – a check, a material threat, a checkmating sequence threat, or the threat of another tactic – that culminates in the opponent's being unable to respond to all of the threats without making some kind of concession.
Game Over: Kasparov and the Machine is a 2003 documentary film by Vikram Jayanti about the match between Garry Kasparov, the highest-rated chess player in history (at the time), the World Champion for 15 years (1985–2000) and an anti-communist politician, and Deep Blue, a chess-playing computer created by IBM.
In chess, prophylaxis consists of a move or series of moves done by a player to prevent their opponent from taking some action. Such preventive moves, or prophylactic moves, aim not only to improve one's position but also to restrict the opponent in improving their own.
Chess strategy is the aspect of chess play concerned with evaluation of chess positions and setting goals and long-term plans for future play. While evaluating a position strategically, a player must take into account such factors as the relative value of the pieces on the board, pawn structure, king safety, position of pieces, and control of key squares and groups of squares (e.g. diagonals ...
Sometimes diagonal opposition is used to achieve direct opposition. An example is the position in the first diagram, with Black to move. White has the direct opposition in this position, but it does him no good because his king cannot attack the black pawn after the black king moves away. White needs to achieve direct opposition closer to the pawn.
The most important scheme of classifying chess openings for serious players is by ECO code, a series of 500 opening codes assigned by the Encyclopaedia of Chess Openings. Although these codes are invaluable for the serious study of the chess opening, they are not very practical for a broad survey of the chess opening as the codes obscure common ...
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Petrov's Defence or the Petrov Defence (also called Petroff Defence, Petrov's Game, Russian Defence, or Russian Game – Russian: Русская партия) is a chess opening characterised by the following moves: