The Nimzo-Indian Defence: 1.d4 Nf6 2.c4... b6 begins with 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3 d5 6.Bd3 b6 (ECO E52). With 39,934 games on record, the patterns below come from the largest practical sample available.
History and Notable Players
It arises from the Nimzo-Indian Defence: 1.d4 Nf6 2.c4... d5. Among the most prolific White practitioners are Svetozar Gligoric (20 games), Rainer Knaak (13 games), Jan Hein Donner (11 games). Black-side regulars include Milko G Bobotsov (9 games), Grzegorz Gajewski (9 games), Vladimir Chuchelov (9 games).
Performance Across Rating Levels
Popularity and results vary sharply by rating level. The 1200 bracket has 920 games (0.00% of all games at that level); White wins 49.5%, Black 48%, 2.5% are drawn. At 1800 the opening surfaces in 0.00% of games; White wins 49.1%, Black 46%, draws 4.9%. At the top end (2500+ Elo), popularity is 0.01% with 10.8% draws — a clear sign of how much theory rules the line at master level. Positions also become less sharp as level rises (sharpness 0.97 → 0.89).
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 O-O, played 68.5% of the time. There are 4 other moves seeing meaningful share, and 86.3% of games stick to established theory. Entropy: 1.74. By 2500, O-O dominates at 65.8% of replies; only 2 viable alternatives remain and 98.4% of moves are theory. Entropy drops to 1.19. That entropy collapse is the signature of a line where preparation pays off: at the top, players know the best move and play it.
Common Mistakes
- Drifting away from main theory — At 400 Elo, theory adherence sits at 86.8% — versus 96% at 2000. The most popular deviation is a3 (played 11.3% 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
Ready to try the Nimzo-Indian Defence: 1.d4 Nf6 2.c4... b6 against a bot? Pick an opponent at your level and play a game.
