Flank openings

Benoni Defense

1.d4 c5

The Benoni Defense starts with 1.d4 c5 and is catalogued under ECO A43, in the flank openings half of the book. The catalog indexes 61 lines inside it, grouped into 47 named variations.

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Current setup

Move ideas

  1. 1.d4

    Takes central space with a protected pawn and frees the queen’s bishop.

    Idea: Build a stable center that supports a broad positional setup.

  2. 1c5

    Challenges White’s d4-pawn from the flank at once.

    Idea: Trade space for an asymmetrical pawn structure and active counterplay.

  3. 2.dxc5

    Captures the pawn on c5 and changes the local pawn or piece balance.

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

  4. 2Na6

    Develops the knight to a6, bringing it into the game.

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

Book continuations

Waiting for Lichess game popularity.

0 moves
This is the end of the indexed line.

Named variations

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

23 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 Benoni Defense.