Chess Openings Lab
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Sicilian Defense: Open

The Open Sicilian with 2...Nc6 arises after 3.d4, where White trades the d-pawn for Black's c-pawn to gain space and open lines. Black must take with 3...cxd4 and then picks a ...g6, ...e5 or ...e6 setup, while White aims for Nxd4, Nc3 and quick development.

Moves
1.e4 c5 2.Nf3 Nc6 3.d4
ECO
B32, B33
Engine
+0.14 · level (Stockfish 17.1, depth 20)
Played
11,981 games in our lichess sample
White scores
52.4%

Key ideas for both sides

White

  • Recapture with Nxd4 and develop Nc3; against ...e5, jump to b5 with Ndb5 and play Bg5 to fight for d5.
  • If Black plays 3...Nxd4, take back twice and centralize the queen on d4 with a clear lead in development.
  • Against the slow 3...d6, push d5 to cramp Black and gain time on the c6 knight.

Black

  • Play 3...cxd4 at once; it is the only move that keeps the position balanced.
  • After Nxd4, ...Nf6 and ...e5 drive the knight away and fight for d4, accepting a hole on d5.
  • Choose ...g6 for the Accelerated Dragon or ...e6 for a flexible setup if you prefer to avoid ...e5 structures.

Plans and pawn structure

After 3...cxd4 4.Nxd4 the classic Open Sicilian structure appears: White has the e-pawn and more central space, Black has the half-open c-file and an extra central pawn. With ...Nf6 and ...e5, Black forces the d4 knight to move and often sees it land on b5, with d6 under pressure. White then plays Bg5 and Nd5 to grab the d5 square. Black counters with ...a6, ...b5 and play on the queenside.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +0.14: level. Its three top choices for Black:

  1. +0.14 3...cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5
  2. +0.85 3...Nxd4 4.Nxd4 cxd4 5.Qxd4 e6 6.Nc3
  3. +1.40 3...d6 4.d5 Nb8 5.h3 a6 6.a4

Pawns, from White's side.

How it scores on lichess

11,981 rated lichess games reached this position; White scored 52.4%.

under 120056.1%
1200–159951.6%
1600–199952.7%
2000 and up51.0%

Light: White wins. Grey: draws. Dark: Black wins. About the sample.

Traps and pitfalls

Magnus Smith Trap (White sets it)

White pushes 8.e5, attacking the f6 knight and offering a pawn. When Black takes with 8...dxe5, the queens face each other, and 9.Bxf7+ drags the king away so 10.Qxd8 wins the queen.

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The Magnus Smith Trap explained

Where it goes next

How to play against it

As Black, take on d4 right away. Do not play 3...d6, which lets White push d5 and kick the knight. 3...Nxd4 is playable but hands White a central queen and easy development. After Nxd4, decide your setup and stick with it.

Other lines with this name

The lichess opening list also files these lines under the same name, though they reach a different position: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4; 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4; 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6.

Questions

What are the moves of the Sicilian Defense: Open?

The Sicilian Defense: Open starts 1.e4 c5 2.Nf3 Nc6 3.d4. Its ECO code is B32, B33.

Is the Sicilian Defense: Open good for White?

Stockfish 17.1 rates the position +0.14 at depth 20, which is level. In 11,981 lichess games from our sample, White scored 52.4%. The main battleground for players who want open, tactical Sicilians, and both sides need to know their chosen setups well.

What is the main idea of the Sicilian Defense: Open?

White opens the center with d4 to gain space and development. Black takes on d4 and then picks a setup, with ...Nf6 and ...e5 being the most direct way to fight for the center.

What should Black play next?

The engine's first choice is cxd4, with Nxd4 and d6 close behind. 3...cxd4 trades a wing pawn for a center pawn and keeps the knight on c6 for later pressure.

Updated October 2026. Sources and method.