The King's Indian Defense: Orthodox Variation begins with 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 (ECO E91). Lichess records 5,355,413 games in this line, which gives us a reliable view of how it actually performs in practice.
History and Notable Players
It arises from the King's Indian Defense: Normal Variation, Rare Defenses. Among the most prolific White practitioners are Lubomir Ftacnik (172 games), Loek Van Wely (164 games), Zdenko Kozul (127 games). Black-side regulars include Ilia Smirin (157 games), Zdenko Kozul (144 games), Wolfgang Uhlmann (141 games).
Performance Across Rating Levels
Popularity and results vary sharply by rating level. The 1200 bracket has 101,718 games (0.02% of all games at that level); White wins 50.3%, Black 46%, 3.7% are drawn. At 1800 the opening surfaces in 0.14% of games; White wins 50%, Black 44.9%, draws 5.1%. At the top end (2500+ Elo), popularity is 1.14% with 9.5% draws — a clear sign of how much theory rules the line at master level. Positions also become less sharp as level rises (sharpness 0.96 → 0.91).
Time Control Patterns
Time control matters here: blitz players reach for this opening more than others. In bullet, it appears in 0.09% of games (2,369,502); White wins 50.2%. Blitz shows 0.13% adoption across 4,656,211 games, White scoring 50.2%. In rapid, the share rises to 0.06% — 689,154 games, White 50.1%.
Move Diversity and Theory Depth
What players actually play after the opening moves depends heavily on rating. At 1200 Elo (101,429 games), the top reply is Nbd7, played 20.3% of the time. Six other moves each take at least 5% of games, and the top three moves account for 48.5% of games. Entropy: 3.16. By 2500 (155,242 games), e5 takes over as the top reply at 60.5%; only four other moves still reach 5% and the top three moves account for 78.1% of games. Entropy drops to 2.01. The narrowing is significant — strong players consolidate around a small set of best moves, while amateurs scatter across many plausible-looking options.
Historical Trends
Long-term, the trajectory of this opening is informative. Adoption peaked in 2017 at 0.16% (177,057 games). By 2025 it sits at 0.09%, 39% below the peak but still 27% 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, the established follow-ups are:
Each branch leads to a different middlegame character — the resulting pawn structure decides what kind of game you get.
Common Mistakes
- Playing outside main lines — At 400 Elo, only 49% of games stay with the three most-played moves; at 2000 that climbs to 71.1%. Most of the gap is players who pick a reasonable-looking move over the best one, and the position quietly drifts.
- Neglecting development — It can feel productive to make extra pawn moves early, but falling behind in piece development is what loses most amateur games — especially in open positions where active pieces find squares fast.
- 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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