C23

Bishop's Opening: McDonnell Gambit

Chess diagram: Bishop's Opening: McDonnell Gambit after 3. b4

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

22,359 games: White 52.5% / Draw 3.2% / Black 44.3%

The moves played next. Pick one to see it on the board.
Next moveGamesWhite / Draw / BlackW / D / B
15,34315K
4,6374,637
1,0571,057
622622
143143
138138
118118
7777

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

Engine evaluation

−0.13 The position is about equal

Best play: 3... Bb6 4. Nc3 Nf6 5. Nf3 O-O 6. O-O c6 7. Nxe5 d5 8. exd5

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

Overview

Bishop's Opening: McDonnell Gambit (ECO C23, Open Games) is a gambit in the Bishop's Opening: Boi Variation, reached after 1. e4 e5 2. Bc4 Bc5 3. b4 (3 moves).

In 22,359 rated Lichess games between players rated 1600 to 2500, White won 52.5%, Black 44.3% and 3.2% were drawn. Black's most played move here is 3…Bxb4, in 69% of those games.

It branches into 2 named variations; the most played are Bishop's Opening: McDonnell Gambit, La Bourdonnais-Denker Gambit and Bishop's Opening: McDonnell Gambit, McDonnell Double Gambit. In all, 3 named lines continue from it.

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How to play against the Bishop's Opening: McDonnell Gambit

3…Bb6 scores best for Black: 50.8%, with Black winning 49.1% and White 47.5% of 4,637 games. The most played answer, 3…Bxb4, scores lowest: 45.3% in 15K games. Stockfish's first choice is also 3…Bb6.

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

Variations (2)

All 3 named lines that continue from here

Cite this page

Caissa Codex. “Bishop's Opening: McDonnell Gambit (C23)”. Lichess data as of 30 Oct 2026. https://chesscodex.org/openings/bishops-opening-mcdonnell-gambit