B20

Sicilian Defense: Lasker-Dunne Attack

Chess diagram: Sicilian Defense: Lasker-Dunne Attack after 2. g3

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

2,180,844 games: White 49.0% / Draw 5.3% / Black 45.7%

The moves played next. Pick one to see it on the board.
Next moveGamesWhite / Draw / BlackW / D / B
929,624930K
463,393463K
311,925312K
169,446169K
142,854143K
57,19857K
30,24030K
30,05930K

Rated Lichess games between players rated 1600 to 2500, from the Lichess opening explorer, updated Nov 10, 2026

Engine evaluation

−0.08 The position is about equal

Best play: 2... d5 3. d3 Nf6 4. e5 Ng4 5. f4 Nc6 6. Bg2 Nh6 7. Nf3

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

By rating

The stronger the players, the better this line does for White: White scores 50% under 1400, 53% at 2200 and up and 50% in master games (wins plus half the draws).

PlayersGamesWhite / Draw / BlackW / D / B
Under 1400 358K
1400–1799 1M
1800–2199 1.3M
2200 and up 227K
Masters, over the board 1,744

Master games

Rated blitz, rapid and classical Lichess games by rating band, and over-the-board games of players rated 2200+ from the Lichess masters database, updated Sep 26, 2026

Overview

Sicilian Defense: Lasker-Dunne Attack (ECO B20, Semi-Open Games) is a variation of the Sicilian Defense, reached after 1. e4 c5 2. g3 (2 moves).

In 2,180,844 rated Lichess games between players rated 1600 to 2500, White won 49.0%, Black 45.7% and 5.3% were drawn. Black's most played move here is 2…Nc6, in 43% of those games.

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How to play against the Sicilian Defense: Lasker-Dunne Attack

2…d5 scores best for Black: 52.2%, with Black winning 49.1% and White 44.6% of 143K games. The most played, 2…Nc6, scores 48.3% in 930K games, and 2…d6 scores lowest: 47.4%. Stockfish's first choice is also 2…d5.

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

Popularity by year

The Sicilian Defense: Lasker-Dunne Attack peaked in 2018 at 0.1% of Lichess games and has slipped since: 0.079% in 2025.

Numbers by year
YearShare of gamesGames
20160.085%30,434
20170.099%54,307
20180.1%80,787
20190.1%125,573
20200.096%280,072
20210.086%337,287
20220.083%310,927
20230.078%294,538
20240.076%272,138
20250.079%275,437
2026 (Jan–Apr)0.077%84,215

Share of rated Lichess games between players rated 1600 to 2500 (blitz, rapid and classical) that reach this position, by year; 2026: January to April. Which openings are rising and falling

Transpositions

Cite this page

Caissa Codex. “Sicilian Defense: Lasker-Dunne Attack (B20)”. Lichess data as of 10 Nov 2026. https://chesscodex.org/openings/sicilian-defense-lasker-dunne-attack