Starting from 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 0-0 6.0-0, players enter the King's Indian Defence: 1.d4 Nf6 2.c4... 6.0-0 — ECO D77. With 808,321 games on record, the patterns below come from the largest practical sample available.
History and Notable Players
It arises from the King's Indian Defence: 1.d4 Nf6 2.c4... 5.Nf3. On the White side, Predrag Nikolic (42 games), Ann Matnadze Bujiashvili (29 games), Lev Gutman (27 games) top the database. Notable Black exponents: Lubomir Ftacnik (22 games), Lev Gutman (19 games), Vlastimil Jansa (14 games).
Performance Across Rating Levels
The picture changes a lot as you climb the rating ladder. At 1200 Elo, the opening shows up in 0.00% of games (10,445 samples). White scores 51.9%, Black 43.6%, draws 4.5%. Move up to 1800 Elo and the share shifts to 0.02%, with White winning 52.1% versus Black's 42.1%. At 2500, 0.19% of games go into this opening; draws sit at 12.4% — the line is well-mapped at this level. White's edge erodes by 6.1pp from 1200 to 2500 Elo, suggesting Black's counterplay is easier to find with experience.
Time Control Patterns
Time control matters here: bullet players reach for this opening more than others. In bullet, it appears in 0.03% of games (707,976); White wins 51.1%. Blitz shows 0.02% adoption across 722,964 games, White scoring 50.2%. In rapid, the share rises to 0.01% — 83,688 games, White 50.9%.
Move Diversity and Theory Depth
Looking at move selection shows how forcing — or not — the position really is. At 1200 Elo, the top reply is dxc4, played 37.2% of the time. There are 6 other moves seeing meaningful share, and 70.1% of games stick to established theory. Entropy: 2.71. By 2500, c6 dominates at 52.2% of replies; only 3 viable alternatives remain and 93.6% of moves are theory. Entropy drops to 1.60. 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 2020 at 0.02% (121,884 games). By 2025 it sits at 0.02% — a 158% shift overall, leaving the line on the rise.
Main Lines and Variations
After 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 0-0 6.0-0, 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
- Drifting away from main theory — At 400 Elo, theory adherence sits at 69.6% — versus 88% at 2000. The most popular deviation is Nc6 (played 7.5% 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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