Caissa Codex
A02

Bird Opening: Siegener Gambit

Chess diagram: Bird Opening: Siegener Gambit after 4. c3

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

506 games: White 50.4% / Draw 2.8% / Black 46.8%

The moves played next. Pick one to see it on the board.
Next moveGamesWhite / Draw / BlackW / D / B
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9696
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22

Rated Lichess games between players rated 1600 to 2500, from the Lichess opening explorer, updated Oct 30, 2026

Engine evaluation

−1.72 Black is clearly better

Best play: 4... Nf6 5. cxd4 cxd4 6. Nxd4 Bc5 7. e3 O-O 8. Be2 Re8 9. O-O

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

Overview

Bird Opening: Siegener Gambit (ECO A02, Flank Openings) is a gambit in the Bird Opening: From's Gambit, reached after 1. f4 e5 2. d4 exd4 3. Nf3 c5 4. c3 (4 moves).

In 506 rated Lichess games between players rated 1600 to 2500, White won 50.4%, Black 46.8% and 2.8% were drawn. Black's most played move here is 4…dxc3, in 69% of those games.

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Other lines from the same position

Instead of 2. d4 exd4 3. Nf3 c5 4. c3, the position after Bird Opening: From's Gambit also goes on to:

Cite this page

Caissa Codex. “Bird Opening: Siegener Gambit (A02)”. Lichess data as of 30 Oct 2026. https://chesscodex.org/openings/bird-opening-siegener-gambit

https://chesscodex.org/openings/bird-opening-siegener-gambit