Queen's Indian Defense: Kasparov-Petrosian Variation, Hedgehog Variation
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 g6
The Queen's Indian Defense: Kasparov-Petrosian Variation, Hedgehog Variation is a chess opening classified as ECO E12, reached after 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 g6. It is a line of the Queen's Indian Defense. White is to move.
In 12.6 million rated Lichess games (blitz and slower), this position was reached 6 times by this move order. White won 50%, 0% were drawn and Black won 50%. The most popular continuation is 6. g3 (33% of games).
Engine evaluation: +0.47 (Stockfish, depth 36; best line 6. Qc2 d5 7. Bg5 a6 8. cxd5 exd5)
- ECO
- E12
- Moves
- 10 plies
- FEN
rn1qkb1r/pbpp1p1p/1p2pnp1/8/2PP4/P1N2N2/1P2PPPP/R1BQKB1R w KQkq - 0 6- PGN
1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 g6
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Results by rating
| Average rating | Games | White / draw / Black |
|---|---|---|
| 2000+ | 6 | |
| All | 6 |
Most played moves
| Move | Games | White / draw / Black |
|---|---|---|
| 6. g3 | 2 (33%) | |
| 6. Qc2 | 2 (33%) | |
| 6. d5 | 1 (17%) | |
| 6. Bf4 | 1 (17%) |
Master games
253 over-the-board games are classified under this line (White 31%, draw 26%, Black 43%). The strongest:
- Ethereal 14.40 (3545) – Obsidian 14.06 (3555) 1/2-1/2 · TCEC 27 Premier 2024 · 2024-12-05
- Obsidian 14.06 (3555) – Ethereal 14.40 (3545) 1-0 · TCEC 27 Premier 2024 · 2024-12-02
- SlowChess Blitz 2.9 avx2 (3455) – Koivisto 9.2 (3493) 1/2-1/2 · TCEC 24 Premier 2023 · 2023-03-25
- Koivisto 9.2 (3493) – SlowChess Blitz 2.9 avx2 (3455) 1-0 · TCEC 24 Premier 2023 · 2023-03-22
- GM Ray Robson (2687) – GM Vincent Keymer (2730) 0-1 · Quantbox Chennai GM 2025 · 2025-08-15
Highest-rated Lichess games
- Oxota_2001 (2523) – Towser1 (2697) 0-1 · 2026-09-01 · 180 + 0s
- Xaalt (2437) – Zohaib_Gillani (2534) 1-0 · 2026-09-05 · 180 + 0s
- olegP_BY (2376) – siskarLJ (2444) 1-0 · 2026-09-01 · 180 + 2s
Comes from
Queen's Indian Defense: Kasparov-Petrosian Variation 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3
More Queen's Indian Defense lines (all)
- Queen's Indian Defense E12
- Queen's Indian Defense: Kasparov Variation (3… b6 4. Nc3) E12
- Queen's Indian Defense: Kasparov Variation, Botvinnik Attack E12
- Queen's Indian Defense: Kasparov-Petrosian Variation, Andersson Variation E12
- Queen's Indian Defense: Kasparov-Petrosian Variation, Classical Variation E12
- Queen's Indian Defense: Kasparov-Petrosian Variation, Kasparov Attack E12
- Queen's Indian Defense: Kasparov-Petrosian Variation, Main Line E12
- Queen's Indian Defense: Kasparov-Petrosian Variation, Marco Defense E12
- Queen's Indian Defense: Kasparov-Petrosian Variation, Modern Variation E12
- Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack E12
- Queen's Indian Defense: Kasparov-Petrosian Variation, Polovodin Gambit E12
- Queen's Indian Defense: Kasparov-Petrosian Variation, Rashkovsky Attack E12
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.