Starting from 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3 d5 6.Bd3 c5 7.0-0 Nc6, players enter the Nimzo-Indian Defence: 1.d4 Nf6 2.c4... Nc6 — ECO E56. Lichess records 50,341 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 Nimzo-Indian Defence: 1.d4 Nf6 2.c4... c5. Among the most prolific White practitioners are Svetozar Gligoric (52 games), Jan Hein Donner (29 games), Rainer Knaak (27 games). Black-side regulars include Yuri L Averbakh (19 games), Boris V Spassky (17 games), Aleksandar Matanovic (17 games).
Move Diversity and Theory Depth
Move choice is far from uniform in the Nimzo-Indian Defence: 1.d4 Nf6 2.c4... Nc6. At 1200 Elo, the top reply is a3, played 36.4% of the time. There are 6 other moves seeing meaningful share, and 69.2% of games stick to established theory. Entropy: 2.75. By 2500, a3 dominates at 61.2% of replies; only 2 viable alternatives remain and 97.1% of moves are theory. Entropy drops to 1.37. 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 e6 3.Nc3 Bb4 4.e3 0-0 5.Nf3 d5 6.Bd3 c5 7.0-0 Nc6 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 61.9% — versus 85.3% at 2000. The most popular deviation is Re1 (played 9.5% of the time at 400, much less so up top). It looks fine but quietly hands the better-prepared side an edge.
- Neglecting development — 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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