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A skewer is the opposite of a pin; the difference is that in a skewer, the more valuable piece is the one under direct attack and the less valuable piece is behind it. [ 1 ] [ 2 ] The opponent is compelled to move the more valuable piece to avoid its capture, thereby exposing the less valuable piece which can then be captured (see chess piece ...
For standard chess, the players must record the moves, which is optional in rapid chess and blitz Chess. [39] Some rules are specifically adapted for blind and visually impaired players. [40] These rules are used for over-the-board (OTB) games. The rules for correspondence chess are defined by the ICCF. [41]
See chess clock. game score Often shortened to score. The record of a game in some form of notation, usually algebraic notation. In over-the-board tournaments, the game score is recorded on a score sheet. [190] gardez [from French: gardez la reine!, "Protect the Queen!"] An announcement to the opponent that their queen is under direct attack ...
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.
Cylinder chess – played on a cylinder, which results in joining the right and left sides of the board. Circular chess – variant played on a circular board. Alice Chess – played with two boards, one of which starts empty. After the completion of each move, the piece that moved is transferred to the same square of the other board (after a ...
In chess, by far the most common scoring system is 1 point for a win, ½ for a draw, and 0 for a loss. A number of different notations are used to denote a player's score in a match or tournament, or their long-term record against a particular opponent. The most common are:
[13] [14] Chess-variant theorist Ralph Betza identified the 'leveling effect', which causes reduction of the value of stronger pieces in the presence of opponent weaker pieces, due to the latter interdicting access to part of the board for the former in order to prevent the value difference from evaporating by 1-for-1 trading. This effect ...
In chess, an X-ray or X-ray attack is a tactic where a piece indirectly controls a square from the other side of an intervening piece. Generally, a piece performing an X-ray either: effects a skewer, [1] [2] [3] indirectly attacks an enemy piece through another piece or pieces, or; defends a friendly piece through an enemy piece.