1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.0-0-0 Bd7 9.f4 Be7 10.Nf3 b5 opens the Sicilian Defence: 1.e4 c5 2.Nf3... b5, ECO B69. Lichess records 8,523 games in this line, which gives us a reliable view of how it actually performs in practice.
History and Notable Players
It arises from the Sicilian Defence: 1.e4 c5 2.Nf3... Be7. Among the most prolific White practitioners are Janis Klovans (11 games), Lothar Vogt (7 games), Sergei Tiviakov (6 games). Black-side regulars include Lars Ake Schneider (11 games), Veijo Maki (8 games), Alon Greenfeld (8 games).
Performance Across Rating Levels
The picture changes a lot as you climb the rating ladder. The 1200 bracket has 3 games (0.00% of all games at that level); White wins 33.3%, Black 66.7%, 0% are drawn. At 1800 the opening surfaces in 0.00% of games; White wins 56.3%, Black 39.6%, draws 4.2%. Among 2500-rated players the line appears in 0.02% of games and draws spike to 8.2%, indicating tight preparation. White's score improves by 15.5pp from the 1200 bracket to the 2500 bracket — the line rewards preparation.
Move Diversity and Theory Depth
Looking at move selection shows how forcing — or not — the position really is. At 1200 Elo, the top reply is Bxf6, played 66.7% of the time. There are 2 other moves seeing meaningful share, and 100% of games stick to established theory. Entropy: 0.92. By 2500, Bxf6 dominates at 58.9% of replies; only 4 viable alternatives remain and 92.6% of moves are theory. Entropy drops to 1.61. Move diversity stays high even at master level, suggesting the opening doesn't force one specific response.
Common Mistakes
- Playing outside main lines — At 400 Elo, only 0% of moves follow established theory — at 2000 that climbs to 89.1%. Most of the gap is players who pick a reasonable-looking move over the best one, and the position quietly drifts.
- Neglecting development — It can feel productive to make extra pawn moves early, but falling behind in piece development is what loses most amateur games — especially in open positions where active pieces find squares fast.
- Ignoring the kingside attack — In sharp Sicilian lines, White typically castles long and pushes the h-pawn. Without your own counterplay on the queenside or in the centre, White's attack lands first.
Practice on Chessiverse
Ready to try the Sicilian Defence: 1.e4 c5 2.Nf3... b5 against a bot? Pick an opponent at your level and play a game.
