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, and the position after those moves has 2 playable continuations 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
Queen's Gambit Declined: Orthodox Defense, Henneberger Variation
15 plies
Orthodox Defense, Swiss, Carlsbad Variation
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. 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. 3d5

    Advances to d5 to claim central space and control nearby key squares.

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

  7. 4.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.

  8. 4Be7

    Develops the bishop to e7, bringing it into the game.

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

  9. 5.Bg5

    Develops the bishop to g5, bringing it into the game.

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

  10. 5O-O

    Tucks the king away and activates the rook in a single move.

    Idea: Finish kingside development so the central pieces can coordinate safely.

  11. 6.e3

    Advances to e3 to claim central space and control nearby key squares.

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

  12. 6Nbd7

    Develops the knight to d7, bringing it into the game.

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

  13. 7.Rc1

    Repositions the rook to c1, where it influences a new part of the board.

    Idea: Improve the piece’s activity and support the next stage of the plan.

  14. 7a6

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

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

Book continuations

Waiting for Lichess game popularity.

2 moves

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.