ECO E66 · King's Indian Defense

King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 Nc6 8. d5

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

8… Na5+0.36

White is slightly better. Stockfish 18, depth 18.

Analyze this position

In the King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line (E66), reached after 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 Nc6 8. d5, Stockfish 18 recommends 8… Na5 for Black. White is slightly better (+0.36).

Top engine moves

  1. +0.368… Na5 9. Nd2 e6 10. Rb1 Re8 11. b3 exd5 12. cxd5 Bd7 13. Bb2
  2. +0.788… Ne5 9. Nxe5 dxe5 10. e4 Ne8 11. b3 Rb8 12. Bb2 Nd6 13. Qc2
  3. +0.908… Nb8 9. e4 e5 10. a3 Kh8 11. Qe2 Nbd7 12. Bg5 h6 13. Be3

Frequently asked questions

What is the best move in the King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line?
After 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 Nc6 8. d5, Stockfish 18 at depth 18 recommends 8… Na5 for Black, continuing 9. Nd2 e6 10. Rb1 Re8 11. b3 exd5 12. cxd5 Bd7 13. Bb2. White is slightly better (+0.36). The next best moves are 8… Ne5 (+0.78) and 8… Nb8 (+0.90).
Is the King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line a good opening?
Stockfish rates the position at +0.36: white is slightly 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 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line?
E66. 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+).