Chess Openings Lab
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Sicilian Defense: Katalimov Variation

The Katalimov Variation is 1.e4 c5 2.Nf3 b6, where Black prepares ...Bb7 to hit e4. White can simply develop with Nc3 and d4, gaining space and a lead in development.

Moves
1.e4 c5 2.Nf3 b6
ECO
B27
Engine
+0.70 · a slight edge for White (Stockfish 17.1, depth 20)
Played
869 games in our lichess sample
White scores
53.5%

Key ideas for both sides

White

  • 3.Nc3 develops and supports e4 before d4, as the top engine line shows.
  • 3.d4 opens the center at once; Nxd4 gives a good open game with an extra tempo.
  • In lines with ...a6 and ...Qc7, Bg5 or g3 add threats while Black's kingside sleeps.
  • h4 is an odd but real try, gaining kingside space before Black commits the king.

Black

  • ...Bb7 hits e4 from the long diagonal and makes White spend moves defending it.
  • ...e6 and ...a6 set up a Kan-like structure with the bishop already on b7.
  • ...Qc7 eyes e5 and the c-file and supports a later ...b5.
  • Avoid ...Bb7 too early if Nb5 jumps are possible; ...a6 first keeps b5 covered.

Plans and pawn structure

Black's ...b6 aims for a bishop on b7 and pressure on e4. White develops with Nc3 and d4, recaptures with the knight and builds a strong center. Black then sets up ...e6, ...a6 and ...Qc7, similar to a Kan but with the queenside bishop already committed. White can use Bg5, g3 and Bg2, or a kingside attack to keep the edge. Black hopes for ...b5 and ...d5 later to free the position.

Where the engine's main line heads: Open Sicilian: White traded the d-pawn for Black's c-pawn. An Open Sicilian: White traded the d-pawn for Black's c-pawn. White has a lead in development and the d-file, Black has the half-open c-file and two central pawns.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +0.70: a slight edge for White. Its three top choices for White:

  1. +0.70 3.Nc3 e6 4.d4 cxd4 5.Nxd4 a6
  2. +0.59 3.d4 cxd4 4.Nxd4 a6 5.Bg5 Qc7
  3. +0.49 3.h4 a6 4.Nc3 e6 5.d4 cxd4

Pawns, from White's side.

How it scores on lichess

869 rated lichess games reached this position; White scored 53.5%.

under 120054.5%
1200–159951.8%
1600–199952.7%
2000 and up58.8%

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

How to play against it

With White, play Nc3 and d4 and recapture with the knight. Develop quickly, keep e4 protected and look for Nb5 or Bg5 while Black is slow. Avoid giving Black time to set up ...Bb7, ...e6 and ...a6 for free without being challenged.

Questions

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

The Sicilian Defense: Katalimov Variation starts 1.e4 c5 2.Nf3 b6. Its ECO code is B27.

Is the Sicilian Defense: Katalimov Variation good for Black?

Stockfish 17.1 rates the position +0.70 at depth 20, which is a slight edge for White. In 869 lichess games from our sample, White scored 53.5%. A rare line that gives White a comfortable game; Black should know Kan-type plans.

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

Black plays ...b6 to set up ...Bb7 and pressure e4. White develops quickly and gets a good open Sicilian.

What should White play next?

The engine's first choice is Nc3, with d4 and h4 close behind. 3.Nc3 develops and keeps e4 safe before d4.

Updated October 2026. Sources and method.