King's Gambit Declined · C30

Norwalde Variation, Bücker Gambit

1. e4 e5 2. f4 Qf6 3. Nc3 Qxf4 4. Nf3 Bb4 5. Bc4

The structure hands White the half-open f-file - rook pressure down it is a standing plan. Black keeps the extra pawn; White plays for time, open lines, and initiative - the classic gambit trade. f4 offers a pawn to drag Black's e-pawn off the centre and open the f-file - development and attack against material, the oldest bargain in chess.

The first 4 moves, explained

• 1. e4 Stakes a claim in the centre, controlling d5, and frees the bishop and queen.
• 1... e5 Stakes a claim in the centre, controlling d4, and frees the bishop and queen.
• 2. f4 Challenges the pawn on e5 - the central tension has to resolve. The pawn is genuinely on offer - this is the King's Gambit: development and initiative over material.
• 2... Qf6 Brings the queen out with a concrete threat - the f4 pawn is suddenly hanging. It also props up the e5 pawn. Theory calls this the Norwalde Variation.

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