Nimzo-Indian Defense — what it means in chess
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4, pinning the knight to fight for the center.
1.d4 Nf6 2.c4 e6 3.Nc3 Bb4, pinning the knight to fight for the center.
[[board startfen="rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1" caption="The Nimzo-Indian: Bb4 pins the knight that fights for e4 — and announces Black's willingness to trade the bishop for structural damage and light-square control. The most respected defense to 1.d4." pgn="d4 Nf6 c4 e6 Nc3 Bb4" notes="The defense strong players agree on. The queen's pawn. The flexible knight. The full claim. Black keeps the center flexible — — and White develops the knight that supports the coming e4. The Nimzo move: the bishop pins that knight against the king, and e4 is frozen. Behind the pin sits a standing offer — bishop for knight, doubling White's c-pawns, trading the bishop pair for structure and the light squares. White's whole opening choice from here is how much to pay to avoid or absorb that trade."]]
The Nimzo-Indian is the defense to 1.d4 with the fewest detractors in chess history: the Bb4 pin freezes White's fight for e4, and behind it stands Nimzowitsch's famous offer — the bishop for the c3 knight, wrecking White's queenside structure and claiming the light squares in exchange for the bishop pair. Every mainline White system against it is, at bottom, an answer to one question: what will you pay to avoid or absorb that trade? Some spend a tempo on a3 to force the matter; some develop around it and accept doubled pawns for the bishops and the center; some sidestep with early Nf3 move orders and never allow the pin at all — an evasion so common it created a whole sibling opening.
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