B30

Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, San Francisco Gambit

Chess diagram: Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, San Francisco Gambit after 4. b4

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Statistics from Lichess

1,557 games: White 41.9% / Draw 5.3% / Black 52.7%

The moves played next. Pick one to see it on the board.
Next moveGamesWhite / Draw / BlackW / D / B
1,2411,241
312312
22
11
11

Rated Lichess games between players rated 1600 to 2500, from the Lichess opening explorer, updated Oct 31, 2026

Engine evaluation

+0.12 The position is about equal

Best play: 4... cxb4 5. d4 a6 6. Bd3 d5 7. exd5 Nf6 8. c4 b5 9. cxb5

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

Overview

Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, San Francisco Gambit (ECO B30, Semi-Open Games) is a gambit in the Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, reached after 1. e4 c5 2. Nf3 Nc6 3. Bb5 Na5 4. b4 (4 moves).

In 1,557 rated Lichess games between players rated 1600 to 2500, White won 41.9%, Black 52.7% and 5.3% were drawn. Black's most played move here is 4…cxb4, in 80% of those games.

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How to play against the Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, San Francisco Gambit

4…a6 scores best for Black: 59.1%, with Black winning 56.1% and White 37.8% of 312 games. The most played answer, 4…cxb4, scores lowest: 54.6% in 1,241 games. Stockfish's first choice is 4…cxb4.

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

Cite this page

Caissa Codex. “Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, San Francisco Gambit (B30)”. Lichess data as of 31 Oct 2026. https://chesscodex.org/openings/sicilian-defense-nyezhmetdinov-rossolimo-attack-san-francisco-gambit