Chess Terms Starting With "I"
Initiative: The advantage that a player who is making threats has over the player who must respond to them. The attacking player is said to "have the initiative".
Indian bishop: A fianchettoed bishop, characteristic of the Indian defenses (King's Indian Defense and Queen's Indian Defense).
Insufficient material: An endgame scenario in which all pawns have been captured, and one side has only its king remaining while the other is down to just a king or a king plus one knight or one bishop. The position is a draw because it is impossible for the dominant side to deliver checkmate regardless of play. Situations where checkmate is possible only if the inferior side blunders are covered by the fifty-move rule.
Interpose: To move a piece between an attacking piece and its target, blocking the line of attack. Interposing a piece is one of the three possible responses to a check, the others being to move the king or capture the attacking piece.
Isolated pawn: A pawn with no pawn of the same color on an adjacent file.
Italian bishop: A White bishop developed to the c4 square or a Black bishop developed to c5. This development is characteristic of the Italian Game, 1.e4 e5 2.Nf3 Nc6 3.Bc4, particularly the Giuoco Piano, 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5, where both players have Italian bishops.
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