Semi-open games

Sicilian Defense

1.e4 c5

The Sicilian Defense starts with 1.e4 c5 and is catalogued under ECO B20, in the semi-open games half of the book. The catalog indexes 388 lines inside it, grouped into 327 named variations, and the position after those moves has 1 playable continuation to walk from here.

Opening repertoire map

Root edges show how often each move is played around your Elo. Use the arrow on a position to reveal the next replies.

Current position
Sicilian Defense: Dragon Variation, Classical Variation, Maróczy Line
Popularity by Elo
Share of Lichess blitz, rapid, and classical games that continued with each move.
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h

Current setup

Move ideas

  1. 1.e4

    Claims the center with a pawn and opens lines for the queen and king’s bishop.

    Idea: Build quick development and make early castling possible.

  2. 1c5

    Challenges d4 from the flank instead of mirroring White’s e-pawn.

    Idea: Create an unbalanced center and active queenside counterplay.

  3. 2.Nc3

    Develops the knight to c3, bringing it into the game.

    Idea: Improve piece coordination and clear the back rank for castling and the rooks.

  4. 2d6

    Advances to d6 to claim central space and control nearby key squares.

    Idea: Give the pieces room to develop behind a durable central foothold.

  5. 3.f4

    Advances the f-pawn to gain kingside space and control new squares.

    Idea: Create useful wing space while keeping the central structure flexible.

  6. 3Nc6

    Develops the knight to c6, bringing it into the game.

    Idea: Improve piece coordination and clear the back rank for castling and the rooks.

  7. 4.Nf3

    Develops the knight to f3, bringing it into the game.

    Idea: Improve piece coordination and clear the back rank for castling and the rooks.

  8. 4g6

    Advances the g-pawn to gain kingside space and control new squares.

    Idea: Create useful wing space while keeping the central structure flexible.

  9. 5.d4

    Advances to d4 to claim central space and control nearby key squares.

    Idea: Give the pieces room to develop behind a durable central foothold.

  10. 5cxd4

    Captures the pawn on d4 and changes the local pawn or piece balance.

    Idea: Open lines in the center and reshape the center for the next phase.

  11. 6.Nxd4

    Captures the pawn on d4 and changes the local pawn or piece balance.

    Idea: Remove an active defender and improve the moving piece’s influence.

  12. 6Bg7

    Develops the bishop to g7, bringing it into the game.

    Idea: Improve piece coordination and clear the back rank for castling and the rooks.

  13. 7.Be3

    Develops the bishop to e3, bringing it into the game.

    Idea: Improve piece coordination and clear the back rank for castling and the rooks.

  14. 7Nf6

    Develops the knight to f6, bringing it into the game.

    Idea: Improve piece coordination and clear the back rank for castling and the rooks.

  15. 8.Be2

    Develops the bishop to e2, bringing it into the game.

    Idea: Improve piece coordination and clear the back rank for castling and the rooks.

  16. 8O-O

    Tucks the king away and activates the rook in a single move.

    Idea: Finish kingside development so the central pieces can coordinate safely.

  17. 9.Nb3

    Repositions the knight to b3, where it influences a new part of the board.

    Idea: Improve the piece’s activity and support the next stage of the plan.

  18. 9Be6

    Develops the bishop to e6, bringing it into the game.

    Idea: Improve piece coordination and clear the back rank for castling and the rooks.

  19. 10.O-O

    Tucks the king away and activates the rook in a single move.

    Idea: Finish kingside development so the central pieces can coordinate safely.

  20. 10Na5

    Repositions the knight to a5, where it influences a new part of the board.

    Idea: Improve the piece’s activity and support the next stage of the plan.

Book continuations

Waiting for Lichess game popularity.

1 move

Named variations

Each line below is an indexed entry under Sicilian Defense. Open one to load it on the board and keep exploring from that position.

303 more named lines sit inside this family — the tree above walks all of them.

ECO groups openings by the structures they lead to, so these families tend to share plans with the Sicilian Defense.