Sicilian Defense
The most analysed answer to 1.e4, and the most popular one at master level. Black declines a symmetrical fight and plays for a win from move one.
| First moves | 1.e4 c5 |
|---|---|
| ECO codes | B20-B99 |
| Also known as | The Sicilian |
| Character | Sharp, unbalanced, theory-heavy |
| Best for | Players who want winning chances with Black and will study lines |
Open any line on the analysis board, or play it out against a bot from where it ends.
Related openings
French Defense
A solid, strategically rich answer to 1.e4 built around one pawn break: ...c5 against White's centre.
Caro-Kann Defense
The solid answer to 1.e4 that keeps the light-squared bishop free - the French Defense without the bad bishop.
Ruy Lopez
The oldest and deepest of the open games. Nearly every world champion has played the Spanish with both colours.
The idea behind 1...c5
After 1.e4 c5 Black attacks the d4 square without committing a central pawn to e5. If White plays the natural 2.Nf3 and 3.d4, the trade cxd4 swaps a wing pawn for a centre pawn. Black ends up with two central pawns to White's one and a half-open c-file pointing at c2 and, more importantly, at White's queenside.
That structural imbalance is the whole point. White gets a lead in development and space, and usually a free hand on the kingside. Black gets the better long-term pawn structure and pressure down the c-file. Neither side can play for a quiet draw, which is why the Sicilian scores better for Black than any other reply to 1.e4.
The Open Sicilian and its main variations
The Open Sicilian starts with 2.Nf3 and 3.d4. Which variation you reach is decided by Black's second and fifth moves:
- Najdorf (5...a6) - among the most heavily analysed openings in chess. 5...a6 takes b5 away from White's pieces before deciding where to put the rest of the army. Expect 6.Bg5, 6.Be3 (the English Attack) and 6.Bc4.
- Dragon (5...g6) - Black fianchettoes and points the g7-bishop down the long diagonal. In the Yugoslav Attack both sides castle on opposite wings and race; White plays Be3, Qd2, f3, O-O-O and h4-h5, Black plays ...Rc8 and ...Nc4.
- Sveshnikov (5...e5) - Black voluntarily creates a hole on d5 to gain time on the knight and free the pieces. Strictly the position after 5...e5 is the Lasker-Pelikan; the Sveshnikov proper is the main line 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5. Popularised at the top level by Kramnik and Carlsen.
- Classical (5...Nc6) and Scheveningen (...e6 and ...d6) - the small-centre setups, flexible and solid, where Black waits for the right moment to break with ...d5 or ...b5.
- Taimanov and Kan (...e6 with ...Nc6 or ...a6) - lower-theory Sicilians that keep the pawn on d7 and aim for a quick ...b5.
If you are learning the Sicilian, pick one variation and learn its plans before its moves. In the Dragon you attack down the c-file; in the Najdorf you fight for the d5 square; in the Sveshnikov you fight to control d5 with pieces. Memorising twenty moves of a line you do not understand loses to the first sideline.
Anti-Sicilians: what you will actually face
The Open Sicilian is still the most common single choice at club level - after 2.Nf3 d6, around 47% of players in the 1400-1600 band go 3.d4 - but the alternatives together account for the other half of those games, and they are far more common there than in master play. Prepare them properly.
The gap is largest for 3.Bc4, which club players choose about 23% of the time after 2...d6 and masters barely 3%. Going the other way, 3.Bb5 (Rossolimo and Moscow) is the main Anti-Sicilian in master practice - 25% after 2...Nc6 - and about half as common below 1600.
2.c3 (Alapin) builds a big centre with d4; Black answers 2...d5 or 2...Nf6. 2.Nc3 with f4 (Grand Prix Attack) and 2.d4 cxd4 3.c3 (Smith-Morra Gambit) are both attacking tries that are unsound with accurate play but dangerous if you have never seen them.
How to study the Sicilian with Chess Compass
Open the analysis board, play out the first ten moves of the line you want, and use the opening explorer to see how often each move is played at your rating and how it scores. When a move surprises you, let Stockfish show the best reply and the evaluation swing.
Then import your own Sicilian games. The game report marks every inaccuracy, mistake and blunder, so you can see whether you are losing points in the opening at all - most club players discover their Sicilian losses start on move 18, not move 8.
Frequently asked questions
Is the Sicilian Defense good for beginners?
It is playable at any level, but it costs more study time than the alternatives because White has so many independent tries. If you are just starting out, the low-theory Sicilians (Kan, Taimanov, Accelerated Dragon) give you the same structural benefits with far less memorisation. 1...e5 and the Caro-Kann are gentler introductions.
What is the best variation of the Sicilian?
There is no objectively best line - the Najdorf, Sveshnikov and Taimanov are all fully sound at the top level. Choose by the positions you like: the Dragon for opposite-side attacking races, the Najdorf for flexible manoeuvring, the Kan if you want to keep theory to a minimum.
Why is the Sicilian so popular?
Because the position is unbalanced from move one, a draw is much harder to force than in symmetrical openings - which suits players who need to win with the black pieces. That, plus decades of top-level practice, has made it the most played answer to 1.e4 among strong players: above 2200 it accounts for around a third of all replies, against a fifth for 1...e5. Below 1600 that order reverses and 1...e5 is far more common.