Starting from 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3, players enter the King's Indian Defence: 1.d4 Nf6 2.c4... 5.Nf3 — ECO D73. Lichess records 252,665 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. Among the most prolific White practitioners are Oleg M Romanishin (30 games), Anatoly Karpov (14 games), Milan Drasko (14 games). Black-side regulars include Zdenko Kozul (13 games), Vlastimil Jansa (11 games), Wlodzimierz Schmidt (10 games).
Performance Across Rating Levels
Popularity and results vary sharply by rating level. Among 1200-rated players, it appears in 0.00% of games — 9,167 of them on record — with White winning 50.6% and Black 45.1%. Move up to 1800 Elo and the share shifts to 0.01%, with White winning 50.7% versus Black's 43.8%. Among 2500-rated players the line appears in 0.02% of games and draws spike to 13.2%, indicating tight preparation. White's edge erodes by 3.4pp from 1200 to 2500 Elo, suggesting Black's counterplay is easier to find with experience.
Move Diversity and Theory Depth
What players actually play after the opening moves depends heavily on rating. At 1200 Elo, the top reply is O-O, played 38.8% of the time. There are 4 other moves seeing meaningful share, and 78.3% of games stick to established theory. Entropy: 2.53. By 2500, O-O dominates at 48.8% of replies; only 3 viable alternatives remain and 98.7% of moves are theory. Entropy drops to 1.61. That entropy collapse is the signature of a line where preparation pays off: at the top, players know the best move and play it.
Main Lines and Variations
The main branches off 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 include:
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 72.1% — versus 93.8% at 2000. The most popular deviation is dxc4 (played 25.4% of the time at 400, much less so up top). It looks fine but quietly hands the better-prepared side an edge.
- 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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