Chessy
Sicilian Defense: Delayed Alapin Variation with d6 a6 – How to Play as White
You've played 1.e4 c5 2.Nf3 d6 3.c3 a6 — the Sicilian Defense: Delayed Alapin Variation — and now you push 4.d4. What happens next? This position has been tested in over 175,000 games, and the numbers are on your side. Stockfish gives White a clear edge at +0.82, and White wins 52.5% of the time from here. Below you'll find the engine's top reply, the most popular moves Black tries, and the one mistake you should be ready to punish. Jump into the interactive drill to practise your response to each of Black's options.
Play the Sicilian Defense: Delayed Alapin Variation, with d6: a6 against the engine
Free, no signup — you play white, the engine adapts to your level.
Jump into the interactive drill below — practise meeting each of Black's replies with the right plan. Create a free account to track your progress and keep your
Create a free account →What You're Fighting For – The Space Advantage
With 4.d4 you've immediately challenged Black's pawn on c5, threatening to open the centre while you already have a comfortable lead in development. The Delayed Alapin aims to build a strong pawn centre with e4 and d4, then use that space to launch an attack. Black's move 3…a6 is a useful waiting move — it prevents your bishop from coming to b5 — but it doesn't address the centre. That's why the engine rates this +0.82 in your favour. You're not just slightly better; you have a lasting, clear advantage to work with if you follow up accurately.
Black's Top Move: cxd4 — and How to Recapture
By far the most popular reply is 4…cxd4, seen in over 140,000 games. Black trades their c-pawn for your d-pawn, hoping to simplify the centre. White scores a solid 52.3% after this capture. What should you do? The engine's suggested continuation is 5.Nf6 Bd3 g6 h3 — developing naturally and keeping the pressure. Don't rush to recapture with the queen; instead, bring out your pieces. After 5.Nxd4 you'll have a comfortable edge with your knight centralised and Black's king still stuck in the middle.
Watch Out for Bg4 — A Costly Mistake
Among Black's options, 4…Bg4 is known to be an inaccuracy, losing roughly half a pawn compared to the better 4…cxd4. Even so, it has been played over 2,600 times — and White scores an impressive 57.2% against it. The pin on your knight looks annoying, but you can simply develop with 5.Be2 or 5.dxc5, gaining time. If Black captures on f3, you recapture with the queen or bishop and enjoy your extra centre pawn and open lines. Keep an eye out for this move; it's a gift of a tempo.
The Other Replies — b6, Nf6, Nc6, and Nd7
Black has several other tries, and each requires a slightly different response. Against 4…b6 (over 10,000 games, White scores 52.5%), Black is preparing to fianchetto on the queenside — continue developing with natural moves like Bd3 and 0-0. After 4…Nf6 (the engine's top pick, though less common), the suggested line is 5.Bd3 g6 6.h3, preventing …Bg4 and keeping your centre intact. Against 4…Nc6 (White scores 54.6%), you can simply take on c5. The one move to treat cautiously is 4…Nd7 — White's win rate drops to 47.4%, so be ready for a solid but less ambitious setup from Black. In every case, your plan is the same: complete development, keep the centre, and prepare a kingside attack.
Results across 176,874 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| cxd4 | 140,725 | 52.3% |
| b6 | 10,307 | 52.5% |
| Nf6 | 4,728 | 53.8% |
| Nc6 | 4,483 | 54.6% |
| Nd7 | 4,092 | 47.4% |
| Bg4 | 2,616 | 57.2% |
Frequently asked questions
Is the Delayed Alapin good for White?
Yes — from this exact position after 4.d4, Stockfish gives White a clear +0.82 advantage. White wins 52.5% of games in the Lichess database, with only 3.9% draws. It's a strong, reliable way to face the Sicilian without needing endless theory.
What is Black's best reply to 4.d4 in this line?
The engine recommends 4…Nf6 as the top move, but the most popular by far is 4…cxd4, played in over 140,000 games. Against both, White keeps a healthy advantage with natural development — Bd3, 0-0, and maintaining the centre.
Should I be afraid of 4…Bg4?
No — 4…Bg4 is actually a mistake for Black, losing about half a pawn. White scores a whopping 57.2% against it. Simply develop with 5.Be2 or capture on c5, and you'll come out with a clear edge.
What makes the Delayed Alapin different from the normal Alapin?
In the standard Alapin (1.e4 c5 2.c3), White plays c3 before Nf3. Here White delays by playing 2.Nf3 and 3.c3, which allows Black to play …d6 and …a6 first. It's a flexible approach that still aims for the same central setup with d4.
How many games feature the Sicilian Defense: Delayed Alapin Variation, with d6: a6?
Over 176K Lichess games have reached the Sicilian Defense: Delayed Alapin Variation, with d6: a6 position. White wins 52.5%, Black wins 43.6%, with 3.9% draws — based on real rated games.