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. Algebraic notation algebraic notation The standard way to record the moves of a chess game, using alphanumeric coordinates for the squares. Īlekhine's gun A special form of battery in which a queen backs up two rooks on the same file. 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 for White the fourth rank or lower for Black). 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. It may also describe an aggressive style of play. active Describes a piece that threatens a number of squares, or that has a number of squares available for its next move. A absolute pin A pin against the king is called absolute since the pinned piece cannot legally move out of the line of attack (as moving it would expose the king to check).
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