Flank openings

Indian Defense

1.d4 Nf6

The Indian Defense starts with 1.d4 Nf6 and is catalogued under ECO A45, in the flank openings half of the book. The catalog indexes 53 lines inside it, grouped into 52 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. 1Nf6

    Develops a knight and prevents White from occupying e4 unchallenged.

    Idea: Keep the central pawns flexible and choose an Indian setup after White commits.

  3. 2.c4

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

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

  4. 2e6

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

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

  5. 3.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.

  6. 3b6

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

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

  7. 4.a3

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

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

  8. 4Bb7

    Develops the bishop to b7, bringing it into the game.

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

  9. 5.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.

  10. 5Ne4

    Repositions the knight to e4, 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

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0 moves
This is the end of the indexed line.

Named variations

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

28 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 Indian Defense.