King's Indian Defense: Orthodox Variation, Korchnoi Attack
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Bd2
The King's Indian Defense: Orthodox Variation, Korchnoi Attack is a chess opening classified as ECO E97, reached after 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Bd2. It is a line of the King's Indian Defense. Black is to move.
This exact move order didn't appear in our sample of 12.6 million Lichess games: it's a rare line.
Engine evaluation: +0.39 (Stockfish, depth 34; best line 9… Nd7 10. Ne1 a5 11. f3 Nc5 12. Nd3)
- ECO
- E97
- Moves
- 17 plies
- FEN
r1bq1rk1/ppp1npbp/3p1np1/3Pp3/2P1P3/2N2N2/PP1BBPPP/R2Q1RK1 b - - 2 9- PGN
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Bd2
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Master games
31 over-the-board games are classified under this line (White 45%, draw 20%, Black 35%). The strongest:
- LCZero 0.30-dag-a9b25c2b-BT2-3 (3598) – Stockfish dev-20230409-b36d39d (3639) 1/2-1/2 · TCEC 24 Superfinal 2023 · 2023-04-21
- Stockfish dev-20230409-b36d39d (3639) – LCZero 0.30-dag-a9b25c2b-BT2-3 (3598) 1/2-1/2 · TCEC 24 Superfinal 2023 · 2023-04-21
- GM Hrant Melkumyan (2670) – GM Ilia Smirin (2609) 0-1 · World Blitz 2018 · 2018-12-29
- GM Vladimir Fedoseev (2674) – GM Daniele Vocaturo (2579) 1-0 · 17th Dubai Chess Open · 2015-04-12
- GM Das Debashis (2522) – GM Farrukh Amonatov (2608) 1/2-1/2 · 11th KIIT Elite Open 2018 · 2018-05-31
Comes from
King's Indian Defense: Orthodox Variation, Aronin-Taimanov Defense 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6
More King's Indian Defense lines (all)
- King's Indian Defense: Fianchetto Variation E60
- King's Indian Defense: Fianchetto Variation, Immediate Fianchetto E60
- King's Indian Defense: Normal Variation, King's Knight Variation E60
- King's Indian Defense: Santasiere Variation E60
- King's Indian Defense: Semi-Classical Variation, Benoni Variation E60
- King's Indian Defense: Semi-Classical Variation, Hollywood Variation E60
- King's Indian Defense E61
- King's Indian Defense: Fianchetto Variation, Benjamin Defense E61
- King's Indian Defense: Semi-Classical Variation E61
- King's Indian Defense: Semi-Classical Variation, Exchange Variation E61
- King's Indian Defense: Semi-Classical Variation, Queenside Storm Line E61
- King's Indian Defense: Smyslov Variation E61
Opening names and moves from the Lichess openings dataset; statistics from the Lichess open database, 2026-09 (CC0), sample of 12.6 million games, bots excluded; evaluations from Lichess cloud analysis (all CC0). Master games from The Week in Chess #920–#1664 by Mark Crowther, used with permission.