1. Keizer system
A pairing system where a players plays an opponent who is close in the ranking. Named after the Dutch inventor of the system, and useful when the number of participants exceeds the number of playing rounds.
2. Key square
An important square.
(Pawn endings) A square whose occupation by one side's king guarantees the achievement of a certain goal, such as the promotion of a pawn or the win of a pawn.
The King's Gambit Accepted chess opening.
The King's Gambit Declined chess opening.
the King's Indian Attack chess opening.
As a spectator, making comments on a chess game that can be heard by the players. Kibitzing on a serious game while it is in progress (rather than during a post-mortem) is a serious breach of chess etiquette.
Attacking a piece, typically by a pawn, so that it will move.
The King's Indian Defence chess opening.
10. King Bishop
The bishop that was on the king-side at the start of the game. The terms King Knight and King Rook are also used. Sometimes abbreviated KB, KN, and KR respectively.
11. King hunt
A sustained attack on the enemy king that results in the king being driven a far distance from its initial position, typically resulting in its checkmate. Some of the most famous games featuring king hunts are Edward Lasker-Thomas, Polugaevsky-Nezhmetdinov, and Kasparov-Topalov.
12. King pawn
A pawn on the king's file, i.e. the e-file. Sometimes abbreviated KP. Also King Bishop Pawn (KBP), King Knight Pawn (KNP), and King Rook Pawn (KRP) for a pawn on the f, g, or h-file respectively.
The side of the board where the kings are at the start of the game (the e through h files), as opposed to the queenside.
15. Knight pawn
A pawn on the knight's file, i.e. the b-file or g-file.
16. Knight's tour
A mathematical treatment of a knight "touring" the board.
17. Knockout tournament
A tournament conducted as a series of matches in which the winner of each match advances to the next round and the loser is eliminated. Well known chess tournaments held in the knockout format include London 1851 and the 2007 Chess World Cup. Cf. #Round-robin tournament and Swiss tournament.
18. Kotov syndrome
This phenomenon, first described by Alexander Kotov, can occur when a player does not find a good plan after thinking long and hard on a position. The player, under time pressure, then suddenly decides to make a move, often a terrible one which was not analysed properly.
The symbol sometimes used for the knight when recording chess moves in descriptive notation, mainly in older literature. An N is used instead in algebraic notation and in later descriptive notation to avoid confusion with K, the symbol for the king.
20. Laws of Chess
The rules of chess>> http://www.fide.com/component/handbook/ ... ew=article
21. Lightning chess
A form of chess with an extremely short time limit, usually 1 or 2 minutes per player for the entire game.
22. Light squares
the 32 light-coloured squares on the chessboard, such as h1 and a8.
23. Light-square bishop
One of the two bishops moving on the light squares, situated on f1 or c8 in the initial position.
A sequence of moves, usually in the opening or in analyzing a position.
An open path for a piece (queen, rook, or bishop) to move or control squares.
25. Long diagonal
One of the two diagonals with eight squares (a1–h8 or h1–a8).
26. Long-range piece
A bishop, rook, or queen.
A loss for one of the two players, which may occur due to that player being checkmated by the other player, resigning, exceeding the time control, or being forfeited by the tournament director. Chess being a zero-sum game, this results in a win for the other player, except in the very rare circumstance where the tournament director forfeits both players, for example for cheating or both players exceeding the time control (the latter does not normally result in a double forfeit today).
28. Lucena position
A well-known rook and pawn versus rook endgame position in which the player with the extra pawn can force a win.
(from the German for air) Space made for a castled king to give it a flight square to prevent a back rank mate. Usually luft is made by moving a pawn on the second rank in front of the king.