Īrabian mate A checkmate that occurs when the knight and rook trap the opposing king in a corner.
Some Anti-Sicilians include the Alapin Variation (2.c3), Moscow Variation (2.Nf3 d6 3.Bb5+), Rossolimo Variation (2.Nf3 Nc6 3.Bb5), Grand Prix Attack (2.Nc3 Nc6 3.f4 g6 4.Nf3 Bg7 and now 5.Bc4 or 5.Bb5), Closed Sicilian (2.Nc3 followed by g3 and Bg2), Smith–Morra Gambit (2.d4 cxd4 3.c3), and Wing Gambit (2.b4). Anti-Sicilian An opening variation that White uses against the Sicilian Defense (1.e4 c5) other than the most common plan of 2.Nf3 followed by 3.d4 cxd4 4.Nxd4 (the Open Sicilian). Antipositional moves are often pawn moves since pawns cannot move backwards to return to squares they have left, their advance can create irreparable weaknesses. Antipositional is used to describe moves that are part of an incorrect plan rather than a mistake made when trying to follow a correct plan. antipositional A move or a plan that is not in accordance with the principles of positional play. announced mate A practice, common in the 19th century, whereby a player would announce a sequence of moves, believed by them to constitute best play by both sides, that led to a forced checkmate for the announcing player in a specified number of moves (for example, "mate in five"). annotation Written commentary on a game or a position using words, chess symbols, and/or notation. At the end of a game, the players will often do an analysis of the game. analysis The study of a game or a position, in order to evaluate the quality of the moves and various other aspects of the game or position. AN An abbreviation for algebraic notation.
#Chess piece moves professional#
It was thought to be impolite to use a player's name without permission, and the professional did not want to risk losing a customer. In the 19th century, "Amateur" was sometimes used in published game scores to conceal the name of the losing player in a Master vs. The distinction between professional and amateur is not very important in chess as amateurs may win prizes, accept appearance fees, and earn any title, including World Champion. amateur Any player whose main occupation is not chess. Īlgebraic notation algebraic notation The standard way to record the moves of a chess game, using alphanumeric coordinates for the squares.
Evaluation factors can include space, time, material, and threats. advantage A better position with the chance of winning the game. An advanced passed pawn that threatens to promote can be especially strong. An advanced pawn may be weak if it is overextended, lacking support and difficult to defend, or strong if it cramps the enemy by limiting mobility. advanced pawn A pawn that is on the opponent's half of the board (the fifth rank or higher).
A player may do this only on their turn, and must first say "I adjust", or the French equivalent "J'adoube". To adjust the position of a piece on its square without being required to move it. A tournament director, or an impartial and strong player, will evaluate the final position and assign a win, draw, or loss assuming best play by both players. adjudication A way to decide the result of an unfinished game. It was once very common in high-level competition, often occurring soon after the first time control, but has been mostly abandoned due to the advent of computer analysis. Bent Larsen, Copenhagen 1966 adjournment Suspension of a chess game with the intention to finish it later. Envelope used for the adjournment of a match game Efim Geller vs.
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