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 10 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
Nimzo-Indian Defense
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.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.

  6. 3Bb4

    Develops the bishop to b4, bringing it into the game.

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

Book continuations

Waiting for Lichess game popularity.

10 moves
e3Nimzo-Indian Defense: Rubinstein System32 named lines · Nimzo-Indian Defense · Nimzo-Indian Defense: Ragozin DefenseAdvances to e3 to claim central space and control nearby key squares.Idea: Give the pieces room to develop behind a durable central foothold.Qc2Nimzo-Indian Defense: Classical Variation16 named lines · Nimzo-Indian Defense: Classical Variation, Keres Defense · Nimzo-Indian Defense: Classical Variation, Noa VariationRepositions the queen to c2, where it influences a new part of the board.Idea: Coordinate threats carefully while avoiding unnecessary tempi against the queen.Nf3Nimzo-Indian Defense: Three Knights Variation6 named lines · Nimzo-Indian Defense: Romanishin Variation · Nimzo-Indian Defense: St. Petersburg VariationDevelops the knight to f3, bringing it into the game.Idea: Improve piece coordination and clear the back rank for castling and the rooks.f3Nimzo-Indian Defense: Kmoch Variation5 named lines · Nimzo-Indian Defense: Sämisch Variation · Nimzo-Indian Defense: Sämisch Variation, Keres VariationAdvances the f-pawn to gain kingside space and control new squares.Idea: Create useful wing space while keeping the central structure flexible.Qb3Nimzo-Indian Defense: Spielmann Variation4 named lines · Nimzo-Indian Defense: Spielmann Variation, Romanovsky Gambit · Nimzo-Indian Defense: Spielmann Variation, Carlsbad VariationRepositions the queen to b3, where it influences a new part of the board.Idea: Coordinate threats carefully while avoiding unnecessary tempi against the queen.Bg5Nimzo-Indian Defense: Leningrad Variation3 named lines · Nimzo-Indian Defense: Leningrad Variation, Benoni Defense · Nimzo-Indian Defense: Leningrad Variation, Averbakh GambitDevelops the bishop to g5, bringing it into the game.Idea: Improve piece coordination and clear the back rank for castling and the rooks.a3Nimzo-Indian Defense: Sämisch Variation2 named lines · Nimzo-Indian Defense: Sämisch Variation, O'Kelly VariationAdvances the a-pawn to gain queenside edge space and control new squares.Idea: Create useful wing space while keeping the central structure flexible.e4Nimzo-Indian Defense: Dilworth Gambit1 named lineAdvances to e4 to claim central space and control nearby key squares.Idea: Give the pieces room to develop behind a durable central foothold.g3Nimzo-Indian Defense: Romanishin Variation1 named lineAdvances the g-pawn to gain kingside space and control new squares.Idea: Create useful wing space while keeping the central structure flexible.Qd3Nimzo-Indian Defense: Mikenas Attack1 named lineRepositions the queen to d3, where it influences a new part of the board.Idea: Coordinate threats carefully while avoiding unnecessary tempi against the queen.

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.