In the fourth place let White play P K 4, and the K is in direct check; but it is now checkmate, for the K has no possible move out of check, and the checking Pawn cannot be taken. Again, let White play Kt, Kt 6, and he gives double check, for the Kt checks directly, and has also discovered the check by the Q. Once more this is checkmate, for the K has no possible move. It is true that the B could capture the attacking Kt, but then the Q still checks and the danger of mate has not been averted; similarly, the P could cover at B 5, but the attack from the Kt remains all the same. This aptly illustrates what I have already said as to the extra danger of a double check.
VIII
Close Game.—See “Game” later on.
Combinations.—The concentrated action of two or more pieces and Pawns, operating in common either for attack or defence.
Command: Commanded.—To “command” a square is to have the power of moving a piece on to it, or to capture an enemy’s piece that already occupies it. To “command” the board is to have the pieces so placed that a great many of the squares are commanded.
Counter Gambit.—See “Game” later on.
Counter Attack.—See “Game” later on.
Debut.—A French word, meaning “opening,” sometimes used by English writers on chess.
Defi.—A French word meaning “challenge,” and sometimes used in English chess books.
Develop: Development.—To develop a piece is to bring it into more active play. To develop a game is to bring as many pieces as you possibly can into active co-operation.