Tree path 6 levels Indian Defense: West Indian Defense › King's Indian Defense › Normal Variation › King's Indian Defense: Normal Variation › Rare Defenses › King's Indian Defense: Orthodox Variation
- Chess Codex
- Indian Defense: West Indian Defense E60
- King's Indian Defense E61
- Normal Variation E70
- King's Indian Defense: Normal Variation E70
- Rare Defenses E90
- King's Indian Defense: Orthodox Variation E91 you are here
King's Indian Defense: Orthodox Variation
Overview
King's Indian Defense: Orthodox Variation is a named branch in the Indian Defenses group of chess theory, classified under ECO E91.
The Indian Defenses group covers Indian defences — hypermodern lines where Black challenges the centre with pieces rather than pawns.
It is reached after 11 plies of play, with the move sequence 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2.
In the opening tree, this line branches off from King's Indian Defense: Normal Variation, Rare Defenses, part of the broader Indian Defense: West Indian Defense system.
3 named variations grow from this line, including King's Indian Defense: Kazakh Variation, King's Indian Defense: Orthodox Variation, Positional Defense, Closed Line.
In total, the branch covers 26 sub-variations across all depths.
Use the board to walk through every move, check how the position has scored on Lichess, or take it head-to-head against Stockfish.
- ECO code
- E91
- Group
- Indian Defenses (E)
- Plies
- 11
- Direct variations
- 3
- Total in subtree
- 26
This overview is generated automatically from the opening's metadata. A more detailed, human-written description is on the way — and you can speed it up by suggesting one yourself.
Statistics from Lichess
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Source: Lichess Opening Explorer · cached
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Variations (3)
Show all 26 sub-variations (full subtree)
- E91 King's Indian Defense: Kazakh Variation 12-ply
- E92 King's Indian Defense: Orthodox Variation 12-ply
- E94 Positional Defense, Closed Line 15-ply
- E92 King's Indian Defense: Exchange Variation 13-ply
- E94 King's Indian Defense: Orthodox Variation 13-ply
- E92 Gligoric-Taimanov System 13-ply
- E92 King's Indian Defense: Petrosian Variation 13-ply
- E95 King's Indian Defense: Orthodox Variation 15-ply
- E97 Aronin-Taimanov Defense 14-ply
- E94 Donner Defense 14-ply
- E94 Glek Defense 14-ply
- E94 Ukrainian Defense 14-ply
- E93 Normal Defense 14-ply
- E92 Stein Defense 14-ply
- E97 King's Indian Defense: Orthodox Variation, Bayonet Attack 17-ply
- E98 King's Indian Defense: Orthodox Variation, Classical System 17-ply
- E97 King's Indian Defense: Orthodox Variation, Korchnoi Attack 17-ply
- E97 King's Indian Defense: Orthodox Variation, Modern System 17-ply
- E96 Positional Defense, Main Line 18-ply
- E93 King's Indian Defense: Petrosian Variation, Keres Defense 21-ply
- E97 Sokolov's Line 19-ply
- E97 Yepishin's Line 19-ply
- E98 Neo-Classical Line 19-ply
- E99 Traditional Line 20-ply
- E99 King's Indian Defense: Orthodox Variation, Classical System, Benko Attack 21-ply
- E98 King's Indian Defense: Orthodox Variation, Classical System, Kozul Gambit 27-ply