Chess Openings Lab
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Sicilian Defense: Bücker Variation

The Bucker Variation is 2.Nf3 h6, a rare Sicilian waiting move that takes g5 away from White's knight and bishop. White simply develops with Nc3 and d4 and gets a comfortable edge, because ...h6 does nothing for Black's development or center.

Moves
1.e4 c5 2.Nf3 h6
ECO
B27
Engine
+0.67 · a slight edge for White (Stockfish 17.1, depth 20)
Played
189 games in our lichess sample
White scores
51.1%

Key ideas for both sides

White

  • 3.Nc3 and d4 lead to an Open Sicilian where Black has spent a tempo on ...h6.
  • In the open lines, Bc4 aims at f7, and the engine shows Black answering with ...e5 to block the center.
  • Consider Nf5 when the knight on d4 is hit by ...e5, using the f5 square.
  • 3.c3 is also fine, playing an Alapin structure where ...h6 is a lost tempo.

Black

  • Use ...h6 to stop Bg5 pins and Ng5 jumps, then develop with ...Nf6, ...d6 and ...e5.
  • Play ...e5 in the open lines to fight for d4 and kick the knight.
  • Accept that ...h6 is slow and catch up in development quickly with ...Nf6 and ...Nc6.
  • Avoid more waiting moves; you need pieces out before White's lead turns into an attack.

Plans and pawn structure

This is an Open Sicilian with Black a tempo down. White develops with Nc3, d4, Bc4 and castles, and can aim for f4 or a Bc4 setup against f7. Black's ...h6 helps against Bg5, but it can be a target for a later g4 push. Black usually plays ...d6, ...Nf6 and ...e5 to control d4 and gain space. If Black catches up in development, the game becomes a normal Sicilian.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +0.67: a slight edge for White. Its three top choices for White:

  1. +0.67 3.Nc3 d6 4.d4 cxd4 5.Nxd4 Nf6
  2. +0.64 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5
  3. +0.53 3.c3 Nf6 4.e5 Nd5 5.d4 cxd4

Pawns, from White's side.

How it scores on lichess

189 rated lichess games reached this position; White scored 51.1%.

1200–159948.1%
1600–199953.2%

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

How to play against it

With White, play 3.Nc3 or 3.d4 and develop quickly. Do not let Black use the time for a comfortable ...e5 setup. With Black, if you play this, follow up with fast development, ...Nf6, ...d6 and ...e5, and accept a slightly worse game.

Questions

What are the moves of the Sicilian Defense: Bücker Variation?

The Sicilian Defense: Bücker Variation starts 1.e4 c5 2.Nf3 h6. Its ECO code is B27.

Is the Sicilian Defense: Bücker Variation good for Black?

Stockfish 17.1 rates the position +0.67 at depth 20, which is a slight edge for White. A dubious waiting move that gives White an easy edge, only for Black players who want to surprise opponents.

What is the main idea of the Sicilian Defense: Bücker Variation?

Black plays ...h6 to take g5 from White's pieces. White develops normally and gets a lead, as the move doesn't help Black's center.

What should White play next?

The engine's first choice is Nc3, with d4 and c3 close behind. 3.Nc3 develops and prepares d4, using the extra tempo Black spent on ...h6.

Updated October 2026. Sources and method.