Chessy
Playing the Nimzo-Indian Defense: Bf4 as Black
The Nimzo-Indian Defense is one of the most respected openings in chess, and the Bf4 variation (1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bf4) is a direct, principled way for White to develop. After the calm but solid move 4...d6, the position is dead level — Stockfish rates it +0.06, a tiny fraction favouring White that means virtually nothing in practice. Across nearly 5,000 games the results are almost perfectly split: White wins 49.4%, Black wins 47.2%, and only 3.3% end in draws. That tells you one thing: this is a fighting opening where both sides have real chances. Let's look at how you should handle it as Black.
Play the Nimzo-Indian Defense: Bf4 against the engine
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Create a free account →The Main Idea Behind 4...d6
With 4...d6 you do something simple but important: you give your dark-squared bishop a retreat square on d7 or e7 if White attacks it, and you keep the centre flexible. You are not committing to ...d5 yet — you are reserving the right to choose your central structure later. The bishop on b4 keeps the pressure on White's knight on c3, and after White's most common move, 5.e3, you can capture on c3 with check and double White's pawns. That gives you a solid long-term target: White's isolated c4-pawn and the weak dark squares around their king. The resulting structure is comfortable for Black and has been tested in thousands of games.
The Engine's Top Choice: 5.e3
The engine recommends 5.e3 as White's best continuation, and it is also the most popular move by a wide margin (2,231 games out of 4,796). After 5.e3, the natural follow-up is 5...Bxc3+ 6.bxc3 Nbd7. Why this sequence? By taking on c3 you saddle White with doubled c-pawns, and then you develop your knight to d7, preparing to challenge the centre with ...e5 or ...c5 later. White scores exactly 50.0% from this position — no advantage at all. That is exactly what you want as Black: a clear plan and equal chances.
What About White's Other Options?
White has a few other tries, and the statistics show how each one fares for you as Black. 5.Nf3 (943 games) is the second most popular — White scores 50.6%, still nothing special. 5.Qc2 (186 games) actually gives White their best result at 54.8%, so be slightly more alert there, but the sample is small. The two moves you should welcome are 5.a3 (698 games, White scores only 48.4%) and 5.Qa4+ (227 games, White scores just 46.7%). Why are those good for you? Because both are actually inaccuracies — a3 loses about 0.5 pawns compared to the best move (Nf3), and Qa4+ loses about 0.6 pawns (best was e3). If your opponent plays either one, you have already gained a small edge.
Punishing White's Inaccuracies
If White plays 5.a3, the best reply according to the engine is simply 5...Bxc3+ 6.bxc3 — you win the bishop pair and damage White's structure, exactly like the main line but with White having wasted a tempo on a3. If White plays 5.Qa4+, you can block with 5...Nbd7 or 5...Bd7, either of which leaves White's queen misplaced. In both cases, you emerge from the opening with a comfortable position and the engine agrees you are already slightly better. Keep an eye out for these moves in your games — they are common at club level because White players want to 'punish' the Bf4 line, but they actually help you.
Results across 4,796 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| e3 | 2,231 | 50.0% |
| Nf3 | 943 | 50.6% |
| a3 | 698 | 48.4% |
| Qa4+ | 227 | 46.7% |
| Qc2 | 186 | 54.8% |
| Qb3 | 110 | 49.1% |
Frequently asked questions
Is the Nimzo-Indian Defense: Bf4 good for Black?
Yes, it is excellent for Black. The position after 4...d6 is completely equal — Stockfish gives +0.06, and in practice Black scores 47.2% wins versus 49.4% for White, which is essentially a dead split given that White moves first. You are not fighting for equality; you are fighting for a win.
What is the best move after 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bf4?
The best move is 4...d6. It is a flexible, solid choice that prepares to develop your pieces while maintaining pressure on White's centre. The position is level, and the engine confirms it.
What should I do if White plays 5.a3 or 5.Qa4+?
Both are inaccuracies. Against 5.a3, take on c3 with check — 5...Bxc3+ — and double White's pawns. Against 5.Qa4+, develop with 5...Nbd7 or 5...Bd7. In both cases you come out of the opening slightly better.
How do I continue after 5.e3 Bxc3+ 6.bxc3?
Develop your knight with 6...Nbd7. Your plan is to challenge the centre with ...e5 or ...c5, targeting White's doubled c-pawns. Your structure is solid and your bishop pair can become strong later.