A chess opening beginning 1. e4 e5 2. Nf3 Nf6.

A chess opening characterized by the moves 1.e4 Nc6, in which the white king's pawn advances two squares and the black queen's knight advances to the bishop file.

(UK, informal, law) gay panic defense

(UK) Alternative spelling of Pac-Man defense.

Alternative form of Two Knights' Defence

A common chess opening, characterized by the moves 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6, in which black brings out both knights.

The concept of an armed attack on another state, when not at war, on the belief that the other state represents a real attack threat. It differs from a preemptive strike which applies to states which are already at war.

(chess) A chess opening characterized by the moves 1.e4 c6, in which the white king's pawn advances two squares and the black king's bishop's pawn advances one square.

A chess opening, a form of Indian Defence, characterised by the moves 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4.

(chess) A chess opening, a form of Indian Defence, characterised by the moves 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+.