1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.a3 Bxc3+ 6.Qxc3 Ne4 7.Qc2 opens the Nimzo-Indian Defence: 1.d4 Nf6 2.c4... 7.Qc2, ECO E37. Lichess records 18,966 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... 5.a3. Among the most prolific White practitioners are Ivan Ivanisevic (8 games), Petr Kiriakov (6 games), Vladimir Alatortsev (6 games). Black-side regulars include Yifan Hou (11 games), Sergey Karjakin (7 games), Konstantin Landa (6 games).
Move Diversity and Theory Depth
Move choice is far from uniform in the Nimzo-Indian Defence: 1.d4 Nf6 2.c4... 7.Qc2. At 1200 Elo, the top reply is Qf6, played 47.5% of the time. There are 3 other moves seeing meaningful share, and 84.2% of games stick to established theory. Entropy: 2.28. By 2500, c5 dominates at 59.1% of replies; only 4 viable alternatives remain and 90.1% of moves are theory. Entropy drops to 1.69. 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
- 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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