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This glossary of chess explains commonly used terms in chess, in alphabetical order.Some of these terms have their own pages, like fork and pin.For a list of unorthodox chess pieces, see Fairy chess piece; for a list of terms specific to chess problems, see Glossary of chess problems; for a list of named opening lines, see List of chess openings; for a list of chess-related games, see List of ...
A database of moves to be played in the chess opening from the beginning of the game. These moves can be selected directly from computer storage and so they do not require search. ply A move by either white or black, hence a half move. A full move is two ply. See ply. principal variation
For example, in a directmate, set play consists of lines of play starting with a Black move (rather than a White move). When set play exists, the key move may be something that does not change the set play lines, in which case the problem is a complete block, or the lines in the set play may change, in which case the problem is a mutate.
The word "turn" can be a problem since it means different things in different traditions. For example, in standard chess terminology, one move consists of a turn by each player; therefore a ply in chess is a half-move. Thus, after 20 moves in a chess game, 40 plies have been completed—20 by white and 20 by black.
The Franco-Indian Defence (also Horwitz Defence) is a chess opening defined by the moves: . 1. d4 e6. This response to White's 1.d4 is so named "because it may lead to the French Defence, or to one of the Indian Defences; it may, however, take a different course."
In chess, an exchange [1] or trade of chess pieces is a series of closely related moves, typically sequential, in which the two players capture each other's pieces. Any type of pieces except the kings may possibly be exchanged, i.e. captured in an exchange, although a king can capture an opponent's piece.
The Scotch Game, or Scotch Opening, is a chess opening that begins with the moves: . 1. e4 e5 2. Nf3 Nc6 3. d4. Ercole del Rio, in his 1750 treatise Sopra il giuoco degli Scacchi, Osservazioni pratiche d’anonimo Autore Modenese ("On the game of Chess, practical Observations by an anonymous Modenese Author"), was the first author to mention what is now called the Scotch Game. [1]
The pieces, board, and starting position of Dynamo chess are the same as in orthodox chess, but captures are eliminated and enemy pieces are instead "pushed" or "pulled" off the board. On any given move, a player can make a standard move as in orthodox chess (without capture), or execute a "push move" or a "pull move".