Chessy
Sicilian Defense: Mengarini Variation – 2...d5
The Sicilian Defense is one of the most popular replies to 1.e4, and White's quiet 2.a3 (the Mengarini Variation) looks more like a waiting move than an attacking one. But when Black immediately strikes with 2...d5, the position opens up on move three. After 3.exd5, it's Black to move, and how they recapture will shape the whole game. Stockfish rates this dead level at +0.21 — a tiny edge that means nothing is decided yet. With over 22,000 games in the database, you have plenty of company in this position. Let's see what the engine and the stats say about your best path forward.
Play the Sicilian Defense: Mengarini Variation: d5 against the engine
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Ready to test your handling of the Mengarini Variation? Play the interactive drill below — the engine will give you Black's most common replies and you'll learn
Create a free account →The Main Idea: Grab the Centre
This is a Sicilian that turns into an open, queenless middlegame faster than almost any other line. After 1.e4 c5 2.a3 d5 3.exd5, Black's only sound move is to recapture immediately with the queen: 3...Qxd5. That leads to 4.Nf3 Nc6 5.Bb5, and you're already eyeing the e5 square. If Black recaptures any other way — with 3...Nf6, 3...e6, 3...e5, or 3...Bf5 — they are making a mistake that costs them roughly a pawn. Your job is simple: know that Qxd5 is coming, play Nf3 and Bb5, and enjoy a comfortable game where your minor pieces are slightly more active. The statistics back this up: in the 18,898 games where Black played 3...Qxd5, White scored 50.8%. That is a healthy winning percentage for a line the engine calls dead equal.
What Black Usually Plays — and How to Punish Their Mistakes
Look at the most-played replies that aren't Qxd5, and you'll see a pattern: every one of them is an error. Here are the numbers from 22,270 games: – 3...Nf6 (2,789 games): White scores 45.5%. Not a clear mistake in the evaluation, but a tricky developing move that requires accurate play. – 3...e6 (311 games): White scores 44.4%. This is a mistake that loses roughly 1.1 pawns. The best was Qxd5. – 3...e5 (71 games): White scores 52.1%. A mistake losing about 1.2 pawns. – 3...Bf5 (55 games): White scores 54.5%. An inaccuracy worth roughly 0.9 pawns. – 3...Qd6 (25 games): White scores a whopping 60.0%, though this is a small sample. The key takeaway: if Black plays anything other than Qxd5, you are already slightly ahead. Against e6 or e5 you get a free pawn; against Bf5 you get clear positional plus. Keep your focus in the drill below — you'll face these moves and need to know the best reply.
The Critical Moment: After 3...Qxd5
When Black plays the best move, 3...Qxd5, the game reaches its tabiya. The engine's recommended continuation is 4.Nf3 Nc6 5.Bb5. Notice what's happening: you develop naturally, pin the knight on c6, and prepare to castle. Black's queen is exposed on d5 and may come under fire from your pieces. There are no immediate tactics, but your small lead in development and the slight awkwardness of Black's queen give you a comfortable edge to play with. This is exactly the kind of position the Mengarini Variation aims for: a simple, sound setup where you outplay your opponent through better piece play, not tricks.
When Should You Play the Mengarini Variation?
The Mengarini Variation (2.a3) is an excellent choice if you want to avoid heavy theoretical lines in the Open Sicilian while still keeping the game unbalanced. You don't need to know dozens of variations — just be ready for 2...d5 (the most principled reply) and handle it with 3.exd5. If Black plays something else, like 2...Nc6 or 2...g6, you can still transpose into familiar Sicilian structures. It also works well if you prefer quieter positions where small advantages matter. The only real downside? Many opponents will equalise easily if they know the Qxd5 recapture. But at club level, most players grab that pawn back with e6 or Nf6 — and then you're already better.
Results across 22,270 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Qxd5 | 18,898 | 50.8% |
| Nf6 | 2,789 | 45.5% |
| e6 | 311 | 44.4% |
| e5 | 71 | 52.1% |
| Bf5 | 55 | 54.5% |
| Qd6 | 25 | 60.0% |
Frequently asked questions
Is 2.a3 in the Sicilian a good move?
It's perfectly playable at club level. Stockfish evaluates the position after 2...d5 3.exd5 as +0.21, which is essentially equal. White scores 50.1% from this position across over 22,000 games. The Mengarini Variation avoids heavy theory but still gives you a fighting game.
What is the best move for Black after 1.e4 c5 2.a3 d5 3.exd5?
The engine says 3...Qxd5 is best, and the database agrees — it was played in 18,898 of the 22,270 games. After 4.Nf3 Nc6 5.Bb5, the position is roughly equal. Any other recapture is a mistake or inaccuracy that gives White an edge worth about a pawn.
Is 3...e6 a mistake in this line?
Yes, 3...e6 is a mistake that costs Black roughly 1.1 pawns according to the engine. White scores 44.4% from this position, noticeably worse than after 3...Qxd5. You should capture on e6 and enjoy your extra material.
How do I play if Black plays 3...Nf6?
After 3...Nf6, the position is less clear-cut than against the other alternatives. White scores 45.5% from this position. You can continue with natural development like Nf3, Bb5+, or c4, keeping the extra pawn and building pressure. The engine still prefers Qxd5 as the best reply, but Nf6 requires accurate play.