The Sicilian Defence: 1.e4 c5 2.Nf3... Be7 begins with 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 (ECO B68). Across rating levels it shows up in 30,116 recorded games — enough data to map exactly where it succeeds and where it stalls.
History and Notable Players
It arises from the Sicilian Defence: 1.e4 c5 2.Nf3... Bd7. Among the most prolific White practitioners are Janis Klovans (11 games), Lothar Vogt (7 games), Walter S Browne (7 games). Black-side regulars include Lars Ake Schneider (22 games), Alon Greenfeld (12 games), Anton Demchenko (11 games).
Performance Across Rating Levels
The picture changes a lot as you climb the rating ladder. Among 1200-rated players, it appears in 0.00% of games — 38 of them on record — with White winning 36.8% and Black 55.3%. By 1800, popularity is 0.00% and White's score is 50% to Black's 44.2%. At the top end (2500+ Elo), popularity is 0.04% with 9% draws — a clear sign of how much theory rules the line at master level. White's score improves by 9.8pp from the 1200 bracket to the 2500 bracket — the line rewards preparation.
Move Diversity and Theory Depth
What players actually play after the opening moves depends heavily on rating. At 1200 Elo, the top reply is Nxc6, played 18.9% of the time. There are 9 other moves seeing meaningful share, and 48.6% of games stick to established theory. Entropy: 3.31. By 2500, Nf3 dominates at 62.1% of replies; only 3 viable alternatives remain and 83.6% of moves are theory. Entropy drops to 2.00. That entropy collapse is the signature of a line where preparation pays off: at the top, players know the best move and play it.
Main Lines and Variations
The main branches off 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 include:
Each branch leads to a different middlegame character — the resulting pawn structure decides what kind of game you get.
Common Mistakes
- Playing outside main lines — At 400 Elo, only 0% of moves follow established theory — at 2000 that climbs to 60.1%. 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
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