ECO B90 · Sicilian Defense

Sicilian Defense: Najdorf Variation, Yates Variation

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bd3

abcdefgh87654321
Black to move. The arrow shows Stockfish’s best move.
Best move

6… Nc6+0.23

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

Analyze this position

In the Sicilian Defense: Najdorf Variation, Yates Variation (B90), reached after 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bd3, Stockfish 18 recommends 6… Nc6 for Black. The position is roughly equal (+0.23).

Top engine moves

  1. +0.236… Nc6 7. Nxc6 bxc6 8. O-O g6 9. Qe1 Nd7 10. f4 Bg7 11. Kh1
  2. +0.336… g6 7. f3 Nc6 8. Be3 Nxd4 9. Bxd4 Bh6 10. g4 e5 11. Bf2
  3. +0.376… e5 7. Nde2 Be7 8. O-O O-O 9. Ng3 b5 10. Bd2 Be6 11. a4

Frequently asked questions

What is the best move in the Sicilian Defense: Najdorf Variation, Yates Variation?
After 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bd3, Stockfish 18 at depth 18 recommends 6… Nc6 for Black, continuing 7. Nxc6 bxc6 8. O-O g6 9. Qe1 Nd7 10. f4 Bg7 11. Kh1. The position is roughly equal (+0.23). The next best moves are 6… g6 (+0.33) and 6… e5 (+0.37).
Is the Sicilian Defense: Najdorf Variation, Yates Variation a good opening?
Stockfish rates the position at +0.23: 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 Sicilian Defense: Najdorf Variation, Yates Variation?
B90. ECO codes classify chess openings from A00 to E99; B is the volume for semi-open games (other than the French).

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