ECO code: A00
Amar Gambit 5.O-O arises after the moves 1. Nh3 d5 2. g3 e5 3. f4 Bxh3 4. Bxh3 exf4 5. O-O. This opening is an offbeat gambit where White offers a pawn early on to accelerate development and open lines, especially focusing on kingside activity.
Characteristic of this move: The key idea behind 5.O-O is rapid king safety combined with pressure on Black’s central and kingside squares. By castling early, White prepares to use the semi-open f-file and bishop activity to challenge Black’s central presence.
Attacking or defensive: From White’s perspective, this is an attacking gambit aiming to unsettle Black’s center and create dynamic chances. Black, having accepted the pawn, typically needs to consolidate and defend carefully, so the position can become sharp and tactical.
Center control: While White initially concedes some central control by giving up a pawn, the gambit is designed to undermine Black’s center indirectly. White challenges the center by leveraging piece activity and pressure rather than occupying the center with pawns immediately.
This opening is defined by the position shown on the board below. The moves displayed are a typical sequence that leads to it, but different sequences can reach the same position and still carry the same opening name.