ECO A51 · Indian Defense

Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Bonsdorf Variation

1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. a3

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

4… d6+1.00

White is clearly better. Stockfish 18, depth 18.

Analyze this position

In the Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Bonsdorf Variation (A51), reached after 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. a3, Stockfish 18 recommends 4… d6 for Black. White is clearly better (+1.00).

Top engine moves

  1. +1.004… d6 5. Qc2 Nc5 6. b4 Ne6 7. exd6 Bxd6 8. Bb2 a5 9. b5
  2. +1.174… Be7 5. Nf3 O-O 6. Qc2 d5 7. e3 c6 8. Nbd2 Bf5 9. Bd3
  3. +1.254… a5 5. Qc2 Nc5 6. Nc3 d6 7. exd6 Bxd6 8. Be3 O-O 9. Nf3

Frequently asked questions

What is the best move in the Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Bonsdorf Variation?
After 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. a3, Stockfish 18 at depth 18 recommends 4… d6 for Black, continuing 5. Qc2 Nc5 6. b4 Ne6 7. exd6 Bxd6 8. Bb2 a5 9. b5. White is clearly better (+1.00). The next best moves are 4… Be7 (+1.17) and 4… a5 (+1.25).
Is the Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Bonsdorf Variation a good opening?
Stockfish rates the position at +1.00: white is clearly better. 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 Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Bonsdorf Variation?
A51. ECO codes classify chess openings from A00 to E99; A is the volume for flank openings.

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