C40

King's Pawn Game: Gunderam Defense, Gunderam Gambit

Chess diagram: King's Pawn Game: Gunderam Defense, Gunderam Gambit after 3…f5

Type a move and press Enter: e4, Nf3, O-O, or from and to squares like g1f3 (e7e8q to promote). The board is also played with the mouse.

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Statistics from Lichess

1,306 games: White 56.0% / Draw 2.5% / Black 41.4%

The moves played next. Pick one to see it on the board.
Next moveGamesWhite / Draw / BlackW / D / B
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Rated Lichess games between players rated 1600 to 2500, from the Lichess opening explorer, updated Oct 31, 2026

Engine evaluation

+2.48 White is clearly better

Best play: 4. exf5 Nf6 5. Nc3 d6 6. O-O Bxf5 7. Re1 Nbd7 8. d4 O-O-O

Stockfish 19, depth 30, after the line's last move. Scores are in pawns, from White's side.

Overview

King's Pawn Game: Gunderam Defense, Gunderam Gambit (ECO C40, Open Games) is a gambit in the Gunderam Defense, reached after 1. e4 e5 2. Nf3 Qe7 3. Bc4 f5 (3 moves).

In 1,306 rated Lichess games between players rated 1600 to 2500, White won 56.0%, Black 41.4% and 2.5% were drawn. White's most played move here is 4. d3, in 38% of those games.

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How to play against the King's Pawn Game: Gunderam Defense, Gunderam Gambit

4. Nc3 scores best for White: 66.6%, with White winning 65.5% and Black 32.4% of 145 games. The most played answer, 4. d3, scores lowest: 55.1% in 490 games. Stockfish's first choice is 4. exf5.

Main answers: those played in at least 5% of these games. Score: White's wins plus half the draws, in rated Lichess games between players rated 1600 to 2500. How to play against other popular openings

Transpositions

Cite this page

Caissa Codex. “King's Pawn Game: Gunderam Defense, Gunderam Gambit (C40)”. Lichess data as of 31 Oct 2026. https://chesscodex.org/openings/kings-pawn-game-gunderam-defense-gunderam-gambit