Semi-open games

Rat Defense

1.e4 d6 2.f4

The Rat Defense starts with 1.e4 d6 2.f4 and is catalogued under ECO B00, in the semi-open games half of the book. The catalog indexes 11 lines inside it, grouped into 11 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 Rat 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 Rat Defense.