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, 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
Benoni Defense: Zilbermints-Benoni Gambit
6 plies
Zilbermints-Benoni Gambit, Tamarkin Countergambit
Popularity by Elo
Share of Lichess blitz, rapid, and classical games that continued with each move.
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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.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.

  4. 2cxd4

    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.

  5. 3.b4

    Advances the b-pawn to gain queenside space and control new squares.

    Idea: Prepare a fianchetto or discourage the opponent’s expansion on that wing.

Book continuations

Waiting for Lichess game popularity.

1 move

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.