Nimzo-Indian Defence
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 · you play black
6 chapters, 8 moves deep, get you to 93% of what you will actually meet. The other 2 cover the last 5%.
Course progress
0 of 182 decisions
0 still learning · 182 not asked yet
2 more chapters are below the depth for your level, together 5% of what you meet.
Drill this opening
Any chapter or study, asked cold — whether or not you owe it. Nothing here is unlocked by anything else.
At your level
Level
Improving
Depth
16 plies of this opening
Chapters
6
Decisions
182
0/182
How this goes wrong at your level
Counted from 4,500,000 games by players in your band. These are moves that get played often and then lose — no engine was asked for an opinion.
What your opponents fall for
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5
e3 — played 17% of the time here.
They score 24% after it, against 55% for everything else played from this position, over 41 games.
They should play:
Bg5
57%
Nf3
54%
d5
51%
Found by testing 94,688 decisions in your band’s games and keeping only those where the drop in score is more than four standard errors below the alternatives. About 3.17 of these would be expected by chance alone.
Your moves are chosen by the engine and checked against 3,439,091 games (Lichess Elite (2500+ vs 2300+), 2024-12 → 2025-11); their replies are what people actually play. Evaluations from Lichess Stockfish evaluations (database.lichess.org) (CC0 1.0 Universal), covering 88% of this course.