1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0 opens the King's Indian Defense: Orthodox Variation, ECO E94. Across rating levels it shows up in 923,060 recorded games — enough data to map exactly where it succeeds and where it stalls.
History and Notable Players
It arises from the King's Indian Defense: Exchange Variation. On the White side, Lubomir Ftacnik (138 games), Loek Van Wely (114 games), Zdenko Kozul (101 games) top the database. Notable Black exponents: Zdenko Kozul (87 games), Ilia Smirin (85 games), Wolfgang Uhlmann (84 games).
Performance Across Rating Levels
How well the King's Indian Defense: Orthodox Variation works depends on what level you're playing at. Among 1200-rated players, it appears in 0.00% of games — 2,496 of them on record — with White winning 49.9% and Black 44.9%. Move up to 1800 Elo and the share shifts to 0.01%, with White winning 51.4% versus Black's 43.9%. Among 2500-rated players the line appears in 0.38% of games and draws spike to 9.2%, indicating tight preparation.
Time Control Patterns
Look at the same opening across time controls and blitz stands out. In bullet, it appears in 0.01% of games (351,558); White wins 50%. Blitz shows 0.02% adoption across 842,761 games, White scoring 50.4%. In rapid, the share rises to 0.01% — 78,789 games, White 51.1%.
Move Diversity and Theory Depth
Move choice is far from uniform in the King's Indian Defense: Orthodox Variation. At 1200 Elo, the top reply is Nc6, played 37.5% of the time. There are 5 other moves seeing meaningful share, and 79.8% of games stick to established theory. Entropy: 2.33. By 2500, Nc6 dominates at 60.4% of replies; only 5 viable alternatives remain and 84% of moves are theory. Entropy drops to 1.93.
Historical Trends
Tracking the King's Indian Defense: Orthodox Variation year over year shows a clear story. Adoption peaked in 2017 at 0.03% (34,657 games). By 2025 it sits at 0.01%, 52% below the peak but still 36% above its 2013 level, so the line is up over the full period despite easing from the high.
Main Lines and Variations
After 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0, the established follow-ups are:
- King's Indian Defense: Orthodox Variation, Aronin-Taimanov Defense
- King's Indian Defense: Orthodox Variation (7...Nbd7)
Each branch leads to a different middlegame character — the resulting pawn structure decides what kind of game you get.
Common Mistakes
- Drifting away from main theory — At 400 Elo, theory adherence sits at 74.5% — versus 93.7% at 2000. The most popular deviation is Re8 (played 8.7% of the time at 400, much less so up top). It looks fine but quietly hands the better-prepared side an edge.
- Neglecting development — Extra pawn moves in the opening are tempting, especially when you "know the moves". Developing a piece each turn is the simple correction.
- Letting White own the centre — Hypermodern openings concede central space on purpose, but only if you strike back in time. Delay the counter-blow and you end up squeezed.
Practice on Chessiverse
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