The Nimzo-Indian Defence: 1.d4 Nf6 2.c4... Nc6 begins with 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6 (ECO E33). Across rating levels it shows up in 129,699 recorded games — enough data to map exactly where it succeeds and where it stalls.
History and Notable Players
It arises from the Nimzo-Indian Defence: 1.d4 Nf6 2.c4... 4.Qc2. Among the most prolific White practitioners are Salo Flohr (12 games), Max Euwe (11 games), Paul Keres (8 games). Black-side regulars include Erich Gottlieb Eliskases (10 games), Philip Stuart Milner Barry (9 games), Hans Joachim Hecht (9 games).
Performance Across Rating Levels
The picture changes a lot as you climb the rating ladder. Among 1200-rated players, it appears in 0.00% of games — 4,347 of them on record — with White winning 52.7% and Black 44.3%. At 1800 the opening surfaces in 0.00% of games; White wins 49.1%, Black 45.9%, draws 5%. Among 2500-rated players the line appears in 0.02% of games and draws spike to 10.6%, indicating tight preparation. White's edge erodes by 7.8pp 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 Nf3, played 49.5% of the time. There are 4 other moves seeing meaningful share, and 85.4% of games stick to established theory. Entropy: 2.12. By 2500, Nf3 dominates at 88.2% of replies; only 2 viable alternatives remain and 99.2% of moves are theory. Entropy drops to 0.64. 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 80.1% — versus 97.6% at 2000. The most popular deviation is e3 (played 23.3% 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
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