Chessy
Sicilian Defense: Closed, Grob Attack
You've played 1.e4, Black answered c5, you developed to Nc3, and they brought out Nc6. Now what if you push g4? You've entered the Sicilian Defense: Closed, Grob Attack — an aggressive, somewhat reckless sideline that immediately asks Black a question. Before you play it, you need to know what you're signing up for. Stockfish gives this a -0.55 evaluation, meaning you already stand slightly worse. The statistics across over 5,000 games confirm that: Black wins 51.9% of the time, while you win only 45.1%. This page will help you understand the position, choose the right follow-ups, and avoid the most common mistake — so you can play the Grob with your eyes wide open.
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Create a free account →What You're Fighting For
With 3.g4, you're not trying to prove an objective advantage. You're aiming to unbalance the game immediately, grabbing space on the kingside and daring Black to misjudge the attack. The engine says -0.55 — a small but clear edge for your opponent — but that doesn't mean the position is unplayable. It means you need to play accurately and know what to do next. The Closed Sicilian (2.Nc3 without an early d4) is already a patient, manoeuvring system, and g4 accelerates the kingside expansion at the cost of weakening your own pawn structure. Your compensation is initiative and attacking chances if Black responds passively.
The Engine's Best Reply: e6
Stockfish's top choice for Black is e6, which leads to a solid setup: after 3...e6, you should continue with Bg2, then Black develops with Nge7, and you follow with d3. The engine line shows you fianchettoing your light-squared bishop and keeping the centre flexible. The bishop on g2 supports your kingside ambitions and eyes the centre, while d3 prepares to develop your pieces and potentially open lines later with f4 or h4. If Black plays e6, the game settles into a more typical Closed Sicilian structure — except you have an extra tempo on the kingside with that g4 pawn.
What the Statistics Reveal
Looking at over 5,000 Lichess games from this exact position, Black's results are consistently better across every reply. Here is how the most common responses score for you (White):- d6 (1,600 games): You score 45.2%- e6 (1,228 games): You score 45.8%- g6 (883 games): You score 44.1%- e5 (604 games): You score 45.0%- Nf6 (278 games): You score 43.5%- a6 (192 games): You score 46.4%No matter what Black plays, your winning percentage hovers between 43% and 46%, and Black's draw rate is very low (just 3.0% overall). That tells you this is a sharp, decisive opening — games tend to end in a win for one side, and slightly more often for Black.
The Mistake to Punish: Nf6
One of Black's options, Nf6, is flagged as an inaccuracy — it loses roughly 0.8 pawns compared to the best move (e6). If your opponent plays Nf6, you have gained a real edge. The knight move looks natural (developing and attacking the e4 pawn), but it runs into difficulties after you support e4 with your pieces and continue your kingside expansion. The best reply according to the engine is still e6 — so if Black doesn't play that, you can capitalise. Keep an eye out for Nf6 in your drill games; it is your chance to prove the Grob's bite.
Results across 5,027 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| d6 | 1,600 | 45.2% |
| e6 | 1,228 | 45.8% |
| g6 | 883 | 44.1% |
| e5 | 604 | 45.0% |
| Nf6 | 278 | 43.5% |
| a6 | 192 | 46.4% |
Frequently asked questions
Is the Sicilian Grob Attack sound?
Objectively, no — Stockfish evaluates it at -0.55, meaning Black has a small advantage with best play. However, it is playable at club level because it creates immediate imbalance and many opponents will not know how to respond accurately.
What is Black's best move against 3.g4?
The engine recommends 3...e6, preparing to develop with Nge7 and keeping the centre solid. After e6, you should play Bg2 and d3, reaching a typical Closed Sicilian structure with your g-pawn advanced.
How do I continue after 3.g4 d6?
The most common reply is d6, seen in 1,600 games. You should continue with Bg2 followed by d3, developing naturally. Black's d6 supports e5 or controls the centre, so you can prepare your own kingside play with h4 or f4 later.
What should I do if Black plays Nf6?
Nf6 is a mistake — it loses about 0.8 pawns compared to the best move e6. You can capitalise by supporting the e4 pawn and continuing your development. The engine suggests e6 was better for Black, so you have gained a real advantage.