Chessy
How to Play the Sicilian Najdorf
The Sicilian Najdorf (1.e4 c5 ...a6) is Black's most ambitious — and most studied — reply to 1.e4, chosen by Fischer and Kasparov because it creates maximum winning chances at the cost of some risk. Play it as Black against the engine below, then see what 5.7 million games tell us.
Play the Sicilian Najdorf against the engine
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Create a free account →What 5...a6 actually does
The move ...a6 looks slow but earns a concrete advantage: it stops Bb5+ and prepares ...b5, giving Black queenside space and the possibility of ...Bb7 or ...e5 later. Black's plan is to generate queenside counterplay faster than White can attack on the kingside. Stockfish evaluates the position at +0.48 — a slight theoretical edge for White that Black knowingly accepts in exchange for dynamic, unbalanced play. Historically, Black has converted this imbalance into strong practical results across millions of games.
White's main attacking systems
In 5,745,279 games, White's most-played tries:
- 6.Bg5 — the English Attack precursor, most popular (1,389,143 games); White scores 46.9%.
- 6.Be3 — the English Attack proper (986,549 games); White scores 49.4% — the engine's recommendation.
- 6.Bc4 — the Fischer–Sozin Attack (961,532 games); White scores 46.7%.
- 6.Bd3 — a quieter plan (718,065 games); White scores 45.4%.
- 6.Be2 — classical development (544,773 games); White scores 47.9%.
- 6.f3 — the Averbakh/English setup (302,223 games); White scores 51.8% — the only try above 50%.
The danger line is 6.f3; learn your response to it.
Black's counterplay: the key plans
Against 6.Be3 (the English Attack), Black's most thematic responses are ...e5 (the engine's pv starts Nb3 Be6) or ...Ng4 — both fight for central space and demand White be concrete. Against 6.Bg5, the Poisoned Pawn (6...e6 7.f4 Qb6) is the sharpest try; quieter players prefer 6...e6 7.f4 Be7. Against 6.f3, the system that scores worst for Black, ...e5 is the main counter — staking out space before White builds a Yugoslav-style attack. The Najdorf rewards players who know the plans by heart; the first few moves of each system need to be automatic.
Honest numbers for the Black player
Black scores 49.0% versus White's 47.2% across 5,745,279 games — Black actually outscores White in this sharp defense despite the engine's +0.48 theoretical assessment. That gap illustrates the Najdorf's practical power: the engine's small edge exists in perfect play, but in human games the dynamic counterplay Black generates tips the balance. The one exception is 6.f3 (White 51.8%) — treat it as the one system requiring specific preparation, not just general Najdorf intuition.
Results across 5,745,279 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Bg5 | 1,389,143 | 46.9% |
| Be3 | 986,549 | 49.4% |
| Bc4 | 961,532 | 46.7% |
| Bd3 | 718,065 | 45.4% |
| Be2 | 544,773 | 47.9% |
| f3 | 302,223 | 51.8% |
Frequently asked questions
Is the Sicilian Najdorf good for beginners?
It's a challenging choice for beginners because several White systems (6.Be3, 6.Bg5, 6.f3) each demand different plans. Most coaches recommend learning a simpler Sicilian (like the Scheveningen) first, then transitioning to the Najdorf once the general Sicilian ideas are clear.
Why does 5...a6 look like a wasted tempo?
It's not — it prevents Bb5+ forever, gains queenside space, and prepares ...b5 or ...e5. The apparent tempo loss is made up by the flexibility Black gains in the middlegame.
What's the most dangerous system White can play against the Najdorf?
By the numbers, 6.f3 (White scores 51.8% across 302,223 games) is the only system where White outscores Black. The English Attack (6.Be3) is the most popular serious try, but Black scores well there (White 49.4%).
Did Fischer and Kasparov both play the Najdorf?
Yes — it was Fischer's main defense to 1.e4 throughout his career, and Kasparov used it as his primary weapon for decades. Their success with it is part of why the Najdorf became the world's most-analyzed opening.
How many games feature the Sicilian Najdorf?
Over 6 million Lichess games have reached the Sicilian Najdorf position. White wins 47.2%, Black wins 49.0%, with 3.8% draws — based on real rated games.
What is Stockfish's evaluation of the Sicilian Najdorf?
At depth 16, Stockfish rates the Sicilian Najdorf as a slight advantage for White (+0.48) from White's perspective. This is the computer's assessment of the position after the main opening moves.