Flank openings

Horwitz Defense

1.d4 e6

The Horwitz Defense starts with 1.d4 e6 and is catalogued under ECO A40, in the flank openings half of the book. The catalog indexes 2 lines inside it, grouped into 2 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. 1…e6

    Advances to e6 to claim central space and control nearby key squares.

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

  3. 2.e4

    Advances to e4 to claim central space and control nearby key squares.

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

  4. 2…d6

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

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

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 Horwitz Defense. Open one to load it on the board and keep exploring from that position.

Openings from the same volume

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