| Checkmate | An attack against the opponent's King which the King cannot escape.... |
| Clearance sacrifice | A move that sacrifices an obstructing piece to make way for a strong or better move.... |
| Combination | A series of moves or a tactical exploitation. ... |
| Development | The process of moving pieces from their starting positions to new posts, from which they control a greater number of squares.... |
| Diagonal | A row of squares running obliquely across the board rather than files and ranks. ... |
| Discovered attack | A player, by moving a piece, uncovers an attack on an opponent's piece.... |
| Discovered check | A player, by moving a piece, uncovers an attack on the opponent's King.... |
| Double attack | An attack against two pieces at the same time.... |
| Double check | A powerful type of discovered attack, which checks the King with two pieces. ... |
| Double Pawns | Two Pawns of the same colour lined up on a file. ... |
| Double Rooks | Two Rooks of the same colour positioned on the same file or rank.... |
| Draw | A tied game. A result in a game of Chess, when neither side wins or loses. ... |
| Elo rating | The system by which players are rated. Invented by Professor Arpad Elo and adopted by FIDE.... |
| En passant | A special Pawn capture. French for „in passing”.... |
| En prise | French for "in a position to be taken". ... |
| Endgame | Also called the ending. This is the third and final state of the game after the opening and middlegame.... |
| Exchange | 1. The trading of a piece for an enemy piece, usually pieces of equal value.
2. Unequal trade of a Rook for a Bishop or Knight. ... |
| Family check | Knight fork which includes an attack on the King and several other Pieces.... |
| Fianchetto | An Italian term that means "on the flank" and applies to the Bishops. ... |
| FIDE | International Chess Federation (French, Federation Internationale Des Echecs.)... |
