ECO E51 · Nimzo-Indian Defense

Nimzo-Indian Defense: Normal Variation, Sämisch Deferred

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. a3

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Black to move. The arrow shows Stockfish’s best move.
Best move

6… Bxc3+−0.03

The position is roughly equal. Stockfish 18, depth 18.

Analyze this position

In the Nimzo-Indian Defense: Normal Variation, Sämisch Deferred (E51), reached after 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. a3, Stockfish 18 recommends 6… Bxc3+ for Black. The position is roughly equal (−0.03).

Top engine moves

  1. −0.036… Bxc3+ 7. bxc3 b6 8. cxd5 exd5 9. Bd3 Re8 10. O-O Nc6 11. Bb2
  2. +0.266… Be7 7. Bd3 b6 8. cxd5 exd5 9. b4 Bb7 10. Bb2 Nbd7 11. O-O
  3. +0.516… Bd6 7. c5 Be7 8. b4 c6 9. Bd3 b6 10. O-O a5 11. Bd2

Frequently asked questions

What is the best move in the Nimzo-Indian Defense: Normal Variation, Sämisch Deferred?
After 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. a3, Stockfish 18 at depth 18 recommends 6… Bxc3+ for Black, continuing 7. bxc3 b6 8. cxd5 exd5 9. Bd3 Re8 10. O-O Nc6 11. Bb2. The position is roughly equal (−0.03). The next best moves are 6… Be7 (+0.26) and 6… Bd6 (+0.51).
Is the Nimzo-Indian Defense: Normal Variation, Sämisch Deferred a good opening?
Stockfish rates the position at −0.03: the position is roughly equal. Evaluations this early in the game are small, so practical results depend far more on knowing the plans and typical structures than on the engine's number.
What is the ECO code of the Nimzo-Indian Defense: Normal Variation, Sämisch Deferred?
E51. ECO codes classify chess openings from A00 to E99; E is the volume for indian defenses.

Opening names from the Lichess opening book (CC0). Pieces by Colin M.L. Burnett (GPLv2+).