Play 3…Bb4 and your bishop pins White’s knight on c3 before you’ve committed a single pawn to the center. That’s the Nimzo-Indian, and it’s been frustrating 1.d4 players for a hundred years. There’s no pawn storm here the way there is in the King’s Indian; you win by strategy, trading a bishop for a knight, wrecking a pawn structure, squeezing a square. It’s one of the most respected replies to 1.d4, and it’s held up at the top level ever since Nimzowitsch introduced it.

The first moves: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4

The Nimzo-Indian takes shape like this: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4. That bishop on b4 does all the heavy lifting. It pins the knight on c3 against the White king, and a pinned knight can no longer control the e4 square.

After 3...Bb4, the bishop pins the c3 knight and contests e4 — the whole Nimzo in one picture.

Why does e4 matter so much? Because that’s the square White dreams of occupying with a pawn to build a dominant center. By pinning the c3 knight, you strip away that control and put an immediate brake on White’s central expansion. Black’s whole plan flows from this one simple idea.

One useful note: the Nimzo only exists if White plays 3.Nc3. Many players prefer 3.Nf3 precisely to sidestep it, and you then shift into other systems like the Queen’s Indian Defense with 3…b6. Worth knowing before you build your repertoire.

Black’s idea

The heart of the Nimzo is a trade: bishop for knight. Very often you take the c3 knight with …Bxc3+, and White recaptures with a pawn, which saddles them with doubled pawns on the c-file.

After ...Bxc3+ bxc3 (here the Sämisch), White is left with doubled c-pawns on c3-c4 — your target for the rest of the game.

So you swap your bishop for a knight, which costs you the bishop pair. In return, you hand your opponent a damaged pawn structure that you’ll lay siege to for the rest of the game. It’s a classic strategic bargain: the quality of your pawns against your opponent’s bishop pair. Depending on the position, you can also keep the bishop and play on control of e4 without trading. The Nimzo is flexible, and that’s what makes it so hard to refute.

The main variations

After 3…Bb4, White has several ways to deal with the pin.

  • The Rubinstein Variation: 4.e3. The most common. White develops calmly and waits to see whether you take on c3 or not. A healthy position, rich in ideas for both sides.
  • The Classical Variation (Capablanca): 4.Qc2. White prepares to recapture on c3 with the queen, avoiding the doubled pawns. In exchange, they lose time and leave the queen a little exposed.
  • The Sämisch Variation: 4.a3. White chases the bishop at once. After 4…Bxc3+ 5.bxc3, they accept the doubled pawns and bet on their center and the bishop pair. An unbalanced, fighting position.
  • The Leningrad Variation: 4.Bg5. White counter-pins your f6 knight. Less common, but sharp.

The common thread runs through all of them: your bishop bears down on the c3 knight, you control the e4 square, and you decide at the right moment whether to trade or keep the tension.

Learning it well

The Nimzo-Indian rewards a feel for structures more than memorized moves. The real question, every single game, is the same: do I take on c3 now, or hold on to my bishop? The answer depends on the position, and you only learn it by playing the pattern many times over. Prologue lets you do exactly that, replaying the line from memory with the reasoning behind each idea, until the call on …Bxc3 comes naturally.

The Nimzo-Indian is the solid reply to 1.d4; its fighting cousin is the King’s Indian Defense. To compare all of Black’s defenses and pick your own, take a look at our guide to Black’s defenses.

Frequently asked questions

Why give up your bishop for a knight?

Because you get something in return: doubled pawns in the enemy camp and lasting control of the e4 square. The bishop pair is an asset, but a damaged pawn structure is a permanent weakness. The trade is good when you know how to exploit it, and the Nimzo is built for exactly that.

Is the Nimzo-Indian too strategic for a beginner?

It’s more positional than tactical, that’s true. But its central idea control e4 and damage the opponent’s structure is easy to grasp and to apply. It teaches you to think in terms of plans and structures, a valuable skill for improving.

Why has the Nimzo been played for so long?

Because its idea still holds up a century after Nimzowitsch invented it. No line for White refutes the control of e4 and the bishop-for-knight trade. It still features in the repertoires of the best players in the world, which tells you plenty about how solid it is.