| WHITE. | BLACK. |
| 1. K. Kt. P. to K. Kt's 4th. | 1. K. P. to K's 4th. |
| 2. K. B. P. to K. B's 4th. | 2. Q. to K. R's 5th, checkmate. |
It cannot possibly be given by the first player.
Forced Move.—When a player has one only legal move at command, it is said to be a forced move.
Gambit.—This word is derived from an Italian phrase in wrestling, and signifies a movement by which the adversary is tripped up. In chess, this is attempted by the first player putting a Pawn en prise of the enemy early in the game, by which he is enabled more rapidly and effectually to develope his superior Pieces. There are several gambits, but the most important, and one which includes many others, is the King's gambit, commenced as follows:—
| WHITE. | BLACK. |
| 1. K. P. to K's 4th. | 1. K. P. to K's 4th. |
| 2. K. B. P. to B's 4th. | 2. P. takes K. B. P. |
The Pawn offered by the first player here at his second move is called the Gambit Pawn, and when taken by the adversary the opening becomes a gambit.
The varieties of the gambits are often designated by the names of the players who invented or first brought them into vogue—as the Muzio gambit, the Salvio gambit, the Allgaier gambit, the Lopez gambit; while others obtain their names from the opening moves of the first player, as the King's Bishop's gambit, which begins thus:—
| WHITE. | BLACK. |
| 1. K. P. to K's 4th. | 1. K. P. to K's 4th. |
| 2. K. B. P. to B's 4th. | 2. P. takes P. |
| 3. K. B. to Q. B's 4th. |
and is so called because the K's Bishop is played out at the 3d move instead of the K's Knight.
There is also the Queen's gambit, of which the opening moves are—