ECO E20Repertoire for Black

Nimzo-Indian Defense - 1... Nf6

One of the most respected defences against 1.d4. Black pins the c3 knight with ...Bb4 to fight for the e4 square and damage White’s pawn structure.

Nimzo-Indian Defense - 1... Nf6

Move1 / 24

1. d4

White’s first move.

Overview

The Nimzo-Indian Defence (ECO E20–E59) is the hypermodern reply to 1.d4 par excellence: after 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4, Black does not cling to the centre with pawns but controls it with pieces. The pin on the c3-knight neutralises the e4-push and immediately poses the opening’s great strategic question: will White get the bishop pair, and at what cost to the pawn structure?

Created and theorised by Aaron Nimzowitsch in the 1920s — it illustrates his famous "first restrain, then blockade, finally destroy" — the Nimzo-Indian has been adopted by virtually every world champion, from Capablanca and Alekhine to Kasparov, Kramnik and Carlsen. It is probably the most respected defence to 1.d4 in history: White avoids it so often (with 3.Nf3 or 3.g3) that dodging it has become an opening choice in itself.

The key ideas revolve around a deliberate exchange: Black willingly gives up the b4-bishop for the c3-knight to double White’s pawns (...Bxc3 followed by bxc3) and then play against the c4 and c3 weaknesses, or to clamp down on the e4-square. White picks a philosophy as early as move four: 4.e3 (Rubinstein, flexible), 4.Qc2 (Classical, avoiding the doubled pawns at the cost of a tempo), 4.a3 (Sämisch, forcing the exchange) or 4.f3 (directly preparing e4).

This is an opening for the demanding positional player, manoeuvring around weak squares and asymmetrical structures rather than attacking on first contact. It requires genuine strategic culture: recommended for advanced and expert players (from 1600-1800 ELO upwards), it rewards understanding far more than memory.

The main line, move by move

Every move is explained: play through them in order to understand the opening’s logic.

1. d4White’s first move.
1… Nf6Development and control of e4.
2. c4Gains space in the centre.
2… e6Frees the f8 bishop and supports d5.
3. Nc3Reinforces control of e4.
3… Bb4The Nimzo move: pins the c3 knight.
4. e3Rubinstein Variation, solid and flexible.
4… O-OBlack castles.
5. Bd3Develops the bishop towards the kingside.
5… d5Contests the centre.
6. Nf3Development.
6… c5Attacks White’s centre.
7. O-OWhite castles.
7… Nc6Develops with pressure on d4.
8. a3Puts the question to the b4 bishop.
8… Bxc3Trades to double White’s pawns.
9. bxc3Recaptures, doubled pawns on the c-file.
9… dxc4Opens the position for the bishop.
10. Bxc4Recapture with the bishop.
10… Qc7Activates the queen and prepares ...e5.
11. Bd3Active retreat of the bishop.
11… e5Breaks in the centre.
12. Qc2Eyes h7 and supports the centre.
12… Re8Activates the rook on the e-file.

Plans for both sides

Black’s plan

Black’s plan flows from the third move: control e4 without a pawn. The ...Bb4 pin immobilises the c3-knight, and as long as e4 is denied to White, Black develops calmly: ...O-O, ...d5 or ...b6 depending on the system, ...c5 to bite on d4. The structural decision is the fate of the b4-bishop: exchange it on c3 to double the pawns, or retreat it to e7 if a3 comes too early to be useful for White. Against the doubled pawns the plan is a model of its kind: close the position, fix the c4-pawn, then besiege it — ...Na5, ...Ba6, ...Rc8 and ...Qc7 all converge on it. Nimzowitsch’s blockade makes full sense when the white bishops, locked behind their own pawns, watch the siege go by. In the more open Rubinstein structures, Black plays ...dxc4 then ...e5 (as in the main line) to free the position and hit the centre before it becomes a steamroller. Two points of vigilance: never let White achieve e4 for free — that is the opening’s entire reason for being — and time ...Bxc3 carefully: exchanging without concrete compensation (doubled pawns, the e4-square, a tempo) amounts to giving up the bishop pair for nothing.

White’s plan

White’s guiding thread is the bishop pair: almost every variation aims to keep it and to open the game so it can speak. In the Rubinstein (4.e3), White develops soberly (Bd3, Nf3, O-O), questions the bishop with a3, then seeks the central push e4 — often prepared by Qc2 or a knight via e2. The big d4-e4 centre, if obtained without concessions, promises a lasting advantage. When the pawns get doubled after ...Bxc3 bxc3, the plan changes in nature: the c3-c4 pawns are ugly but hold the centre, and White must play WITH them — push e4 and sometimes f4-f5, attacking on the kingside while the central mass advances. White’s worst-case scenario is a closed position where the c4-pawn becomes a fixed target: activity is needed before Black sets up the blockade. In the Classical (4.Qc2), White keeps a healthy structure and recaptures on c3 with the queen; in exchange, a tempo of development is conceded. The plan: finish development without accidents, take control of e4, and make the two bishops count in the endgame. Patience is the cardinal virtue — looking for a quick win in the Nimzo-Indian is the surest way to lose the thread.

Main variations

Classical Variation
ECO E32
White plays 4.Qc2 to recapture on c3 with the queen and keep a healthy pawn structure.
Sämisch Variation
ECO E26
White plays 4.a3 to win the bishop pair at once, at the cost of doubled pawns.
Nimzo-Indian Defense
ECO E20
Frequent line: the 4.Bd2 reply (~15% at peer level). Engine-verified continuation.
Nimzo-Indian Defense: Leningrad Variation
ECO E30
Frequent line: the 4.Bg5 reply (~15% at peer level). Engine-verified continuation.
Nimzo-Indian Defense: Three Knights Variation
ECO E21
Frequent line: the 4.Nf3 reply (~17% at peer level). Engine-verified continuation.
Nimzo-Indian Defense: Classical Variation (4.Qc2, 5.Bg5)
ECO E32
Frequent line: 4.Qc2, the 5.Bg5 reply (~17% at peer level). Engine-verified continuation.
Nimzo-Indian Defense: Classical Variation (4.Qc2, 5.e4)
ECO E32
Frequent line: 4.Qc2, the 5.e4 reply (~22% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 5.Ne2
ECO E20
Frequent line: the 5.Ne2 reply (~18% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 5.Nf3
ECO E20
Frequent line: the 5.Nf3 reply (~21% at peer level). Engine-verified continuation.
Nimzo-Indian Defense: Classical Variation (4.Qc2, 5.Nf3)
ECO E32
Frequent line: 4.Qc2, the 5.Nf3 reply (~25% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.Qc2, 6.bxc3
ECO E20
Frequent line: 4.Qc2, the 6.bxc3 reply (~11% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.a3, 6.Bg5
ECO E20
Frequent line: 4.a3, the 6.Bg5 reply (~15% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 6.cxd5
ECO E20
Frequent line: the 6.cxd5 reply (~12% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.a3, 6.Qc2
ECO E20
Frequent line: 4.a3, the 6.Qc2 reply (~8% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.a3, 6.d5
ECO E20
Frequent line: 4.a3, the 6.d5 reply (~10% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.a3, 6.f3
ECO E20
Frequent line: 4.a3, the 6.f3 reply (~11% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 6.Ne2
ECO E20
Frequent line: the 6.Ne2 reply (~43% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.a3, 6.Nf3
ECO E20
Frequent line: 4.a3, the 6.Nf3 reply (~25% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 7.a3
ECO E20
Frequent line: the 7.a3 reply (~9% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 7.cxd5
ECO E20
Frequent line: the 7.cxd5 reply (~15% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.Qc2, 7.f3
ECO E20
Frequent line: 4.Qc2, the 7.f3 reply (~19% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.Qc2, 7.Nf3
ECO E20
Frequent line: 4.Qc2, the 7.Nf3 reply (~31% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.a3, 7.Nf3
ECO E20
Frequent line: 4.a3, the 7.Nf3 reply (~39% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 8.cxd5
ECO E20
Frequent line: the 8.cxd5 reply (~21% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.Qc2, 8.e3
ECO E20
Frequent line: 4.Qc2, the 8.e3 reply (~34% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.Qc2, 8.f3
ECO E20
Frequent line: 4.Qc2, the 8.f3 reply (~29% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.a3, 8.Nf3
ECO E20
Frequent line: 4.a3, the 8.Nf3 reply (~29% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.a3, 9.O-O
ECO E20
Frequent line: 4.a3, the 9.O-O reply (~69% at peer level). Engine-verified continuation.
Nimzo-Indian Defense — 4.Qc2, 9.e3
ECO E20
Frequent line: 4.Qc2, the 9.e3 reply (~61% at peer level). Engine-verified continuation.

Typical pawn structures

The doubled c3-c4 pawns facing the c5-d5 duo

The Nimzo-Indian’s emblematic structure: White has the bishop pair and a reinforced centre (c3 supports d4), but the doubled pawns on the c-file are a permanent mortgage. White’s plan is dynamic: resolve the tension at the right time, open the position with e4 (after cxd5 or dxc5 as appropriate) and bring the bishops to life before the endgame. Black’s plan is the siege: fix c4 by closing the file, then converge on it with ...Na5, ...Qc7 and ...Ba6 — every piece exchange brings closer the endgame where c3 and c4 become immobile targets.

The central c5-e5 tension against d4-e3

The critical position of the Rubinstein main line: Black has returned the bishop pair but gained time (...dxc4 then ...e5 hitting the bishop) to bite on d4 from both sides. White must manage the tension: dxe5 concedes the e5-square and frees Black’s pieces, d5 closes the game and buries the bishops, maintaining it demands well-coordinated pieces. White’s best scenario: open the game at the moment the bishops dominate. Black plays against the suspended centre — ...exd4/...cxd4 at just the right time, pressure down the e-file, and the c6-knight ready to settle on the weakened squares.

Common mistakes

Assuming ...Bxc3 is always a gain. The trade only makes sense together with a locked centre: without ...c5, ...e5 or real pressure on c4, White simply plays e4 and d5, and the two bishops sweep the board. Many players capture on c3 "on principle" and are then left without a plan.

Opening the position too early as Black. A hasty exchange on d4 or c4 makes the game fluid, which is exactly what the bishop pair wants. The rule of thumb runs the other way: the side with two bishops seeks open lines, the side with the knight seeks a blockade.

For White, underestimating the weakness of the c4-pawn and of the c4-square in general. After ...dxc4 and ...Ba6, or with black pieces stacking up on the c-file, the doubled pawns become a genuine long-term liability. Another costly reflex: playing a3 very early without being ready for it, handing Black the exchange it wants in a favourable version.

Frequently asked questions

Why does Black give up the bishop pair so quickly?

Because Black gets a lasting structural defect in return: the doubled c3-c4 pawns. The b4-bishop has limited prospects if it stays there anyway, and black knights thrive in front of a blocked centre. It’s a strategic bargain, not a free concession.

Is the Nimzo-Indian too hard for a 1000-rated player?

No, provided you learn the ideas rather than the moves: pin the c3-knight, blockade the centre with ...c5 and ...e5, pressure c4. The positions are solid and forgive inaccuracies, unlike many sharp defences.

What if White plays 3.Nf3 instead of 3.Nc3?

Then the Nimzo isn’t available, since there’s no knight on c3 to pin. You need a companion answer: the Queen’s Indian with 3...b6, or the Bogo-Indian with 3...Bb4+, are the usual choices.

Should Black always take on c3, or can the bishop be kept?

Keeping the bishop is perfectly playable, often by retreating it to e7 or d6 if White plays a3 at an awkward moment. The capture is only attractive when it creates the doubled pawns in a position where Black can then blockade the centre.

Results by rating level

WhiteDrawsBlack

Most-played lines (1600–1799 level)

Nimzo-Indian DefenseBb448%
49% wins (White)
QGD Normal Defensed532%
49% wins (White)
Central thrust …c5c56%
49% wins (White)
Passive development …Be7Be74%
52% wins (White)
Queenside fianchetto …b6b63%
50% wins (White)
Slav-like solid …c6c62%
53% wins (White)

The percentage shows the move’s popularity (share of games that play it). White’s score stays near 50% because all of these lines are sound — popularity is what sets them apart.

Position explorer

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Rated Lichess games in blitz and rapid, ELO band 1600–1799.

Moves played: 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4

Evaluating…

No game on record at this position.

Reference games

Step through each game at your own pace with the arrows — it opens at the end of the opening.

Ding Liren (2806) — Carlsen, M. (2864)Draw · 2022

A clash of titans: Ding Liren, China’s most decorated chess player known for his deep positional understanding, faces Magnus Carlsen, five-time World Champion and arguably the greatest player of all time. By 2022, Ding was at the peak of his powers, on the verge of claiming the world title the following year — this Nimzo-Indian battle showcases two radically different approaches to balance and tension. Essential viewing to understand how the world’s elite navigate from the very first moves.

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Caruana, Fabiano (2835) — Carlsen, Magnus (2863)Draw · 2020

Caruana and Carlsen, opponents in the 2018 World Championship match, face off in a Nimzo-Indian. Caruana chooses the Rubinstein Variation (4.e3); Carlsen answers with …b6 and the trade of light-squared bishops (8…Ba6 9.Bxa6). The game ends in a draw after 54 moves.

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Kramnik, Vladimir (2783) — Carlsen, M. (2881)Draw · 2014

Vladimir Kramnik, World Champion from 2000 to 2007 and one of the most theoretically prepared players in history, invites Carlsen into the Nimzo-Indian — a territory where his encyclopaedic opening knowledge is a formidable weapon. Carlsen, crowned World Champion just one year earlier, faces the legendary defensive solidity of the man who famously dethroned Kasparov through sheer positional discipline. A generational clash and a fascinating duel of chess philosophies.

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Nakamura, Hi (2789) — Carlsen, M. (2872)Black wins (resignation, time or agreement) · 2014

Hikaru Nakamura, the fiery American known for his fighting spirit and extraordinary nerves — particularly in fast time controls — takes on Carlsen in a 2014 Nimzo-Indian. At the time, Nakamura was one of the very few players in the world with a respectable score against the World Champion, powered by his relentless will to complicate the game. The contrast between Nakamura’s explosive style and Carlsen’s clinical precision makes for a game with zero quiet moments.

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Model games

Real master games in this opening, reviewed at depth 25 — open one to study the eval graph, move classifications and key turning points.