1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 0-0 6.e3 opens the Nimzo-Indian Defence: 1.d4 Nf6 2.c4... 6.e3, ECO E28. Across rating levels it shows up in 83,083 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... 0-0. Among the most prolific White practitioners are Anatoly Vaisser (8 games), Marcus Vinicius M Santos (8 games), Herman Steiner (5 games). Black-side regulars include Ludek Pachman (4 games), Lajos Portisch (3 games), Michail Brodsky (3 games).
Performance Across Rating Levels
How well the Nimzo-Indian Defence: 1.d4 Nf6 2.c4... 6.e3 works depends on what level you're playing at. The 1200 bracket has 5,358 games (0.00% of all games at that level); White wins 48.2%, Black 48.2%, 3.7% are drawn. Move up to 1800 Elo and the share shifts to 0.00%, with White winning 46.3% versus Black's 49.1%. At 2500, 0.02% of games go into this opening; draws sit at 7.8% — the line is well-mapped at this level. White's score improves by 4.0pp from the 1200 bracket to the 2500 bracket — the line rewards preparation.
Move Diversity and Theory Depth
What players actually play after the opening moves depends heavily on rating. At 1200 Elo, the top reply is d5, played 32.2% of the time. There are 7 other moves seeing meaningful share, and 63.5% of games stick to established theory. Entropy: 2.82. By 2500, c5 dominates at 42.4% of replies; only 5 viable alternatives remain and 80% of moves are theory. Entropy drops to 2.21. 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.a3 Bxc3+ 5.bxc3 0-0 6.e3 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 62.6% — versus 78.7% at 2000. The most popular deviation is Ne4 (played 18.5% 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
Ready to try the Nimzo-Indian Defence: 1.d4 Nf6 2.c4... 6.e3 against a bot? Pick an opponent at your level and play a game.
