Nimzo-Indian Defense: Normal Variation, Bernstein Defense, Exchange Line

Before the first move

The Nimzo-Indian is a sophisticated defense where Black pins the c3-knight to restrain White's central ambitions. In this main line, White accepts doubled pawns in exchange for the bishop pair and a powerful center, creating a strategic battleground where piece activity clashes with structural integrity.

1. d4White

White starts with d4, a classical choice that immediately controls the center and prepares for development. By occupying d4, White limits your options for early central expansion and sets the stage for a strategic struggle.

1... Nf6Black · your move

Develop your knight to f6. This flexible move prevents White from immediately playing e4 and keeps your options open. You are ready to react to White's next move while preparing for kingside castling.

Other paths here: Na6 (Australian Defense) · g5 (Borg Defense: Borg Gambit) · b6 (English Defense) · e5 (Englund Gambit)

2. c4White

White plays c4, the signature move of the Queen's Gambit family. It challenges the center from the side. You might see the London System with Bf4 or the Trompowsky with Bg5, but c4 is the most ambitious.

Other paths here: f4 (Canard Opening) · g4 (Indian Defense: Gibbins-Weidenhagen Gambit) · e4 (Indian Defense: Omega Gambit) · d5 (Indian Defense: Pawn Push Variation)

2... e6Black · your move

Move your pawn to e6. This solidifies your control of d5 and opens the diagonal for your dark-squared bishop. You are preparing to challenge White's center while keeping your king's safety in mind.

Other paths here: g5 (Indian Defense: Medusa Gambit) · b5 (Indian Defense: Pyrenees Gambit) · a6 (Indian: 2.c4 a6) · Nc6 (Mexican Defense)

3. Nc3White

White plays Nc3, developing a piece and preparing e4. This is the critical moment where you decide your defense. White could have played Nf3 to avoid the pin, which often leads to the Catalan Opening.

Other paths here: g3 (Catalan Opening) · Qb3 (Indian Defense) · g4 (Indian Defense: Devin Gambit) · Bg5 (Indian Defense: Seirawan Attack)

3... Bb4Black · your move

Slide your bishop to b4. This pin on the c3-knight is the defining move of the Nimzo-Indian Defense. You are preventing White from playing e4 and preparing to trade the bishop for the knight.

Other paths here: b6 (Queen's Pawn: Neo-Indian, 3...b6) · c5 (Queen's Pawn: Neo-Indian, 3...c5) · d5 (Queen's Gambit Declined: Exchange Variation)

4. e3White

White chooses e3, the solid Rubinstein System. White ignores the pin for now to focus on development. Sharper alternatives include the 4.f3 Kmoch Variation or the 4.Qc2 Classical Variation which avoids doubled pawns.

Other paths here: f3 (Nimzo-Indian Defense: Kmoch Variation) · Qd3 (Nimzo-Indian Defense: Mikenas Attack) · g3 (Nimzo-Indian Defense: Romanishin Variation) · Bd2 (Nimzo-Indian: 4.Bd2)

4... O-OBlack · your move

Castle your king to safety. This is a vital step in your development, securing your king before the central tension explodes. You are now ready to strike at White's center with d5 or c5.

Other paths here: Nc6 (Nimzo-Indian Defense: Rubinstein System, Taimanov Variation) · c5 (Nimzo-Indian Defense: Rubinstein System) · b6 (Nimzo-Indian Defense: St. Petersburg Variation) · d5 (Keres Variation, Nimzo-Indian)

5. Bd3White

White plays Bd3, developing the bishop to its most aggressive post. White is catching up in development. Sometimes White tries 5.Ne2 to avoid doubled pawns or 5.Nf3 to keep the d-pawn flexible.

Other paths here: Ne2 (Nimzo-Indian Defense: Reshevsky Variation) · Nf3 (Nimzo-Indian Defense) · a3 (Nimzo-Indian Defense: Sämisch Variation)

5... d5Black · your move

Push your pawn to d5. This move directly challenges White's center and opens lines for your pieces. You are creating central tension and forcing White to make a decision about the pawn structure.

Other paths here: b6 (Nimzo-Indian: 4.e3 O-O 5.Bd3 b6) · c5 (Nimzo-Indian: 4.e3 O-O 5.Bd3 c5) · d6 (Nimzo-Indian: 4.e3 O-O 5.Bd3 d6)

6. Nf3White

White plays Nf3, the most natural developing move. White is now ready to castle. Other options like 6.Ne2 are also popular, intending to recapture on c3 with a knight if you trade your bishop.

Other paths here: a3 (Nimzo-Indian: 4.e3 O-O 5.Bd3 d5 6.a3) · cxd5 (Nimzo-Indian: 4.e3 O-O 5.Bd3 d5 6.cxd5) · Ne2 (Nimzo-Indian: 4.e3 O-O 5.Bd3 d5 6.Ne2)

6... c5Black · your move

Advance your pawn to c5. This move increases the pressure on White's d4-pawn and challenges the entire central structure. You are aiming for a dynamic position with plenty of counterplay.

Other paths here: b6 (Nimzo-Indian Defense: Normal Variation, Schlechter Defense) · Nc6 (Nimzo-Indian Defense: Ragozin Defense)

7. O-OWhite

White castles, bringing the king to safety and finishing the initial development. The position is now highly tense with multiple pawn captures possible. Both sides have achieved their primary opening goals.

7... Nc6Black · your move

Develop your knight to c6. This move adds more pressure to d4 and prepares to jump into the heart of White's position. You are now fully developed and ready for the main battle.

Other paths here: Nbd7 (Nimzo-Indian Defense: Normal Variation, Gligoric System) · b6 (Nimzo-Indian Defense: Normal Variation, Gligoric System, Keres Variation) · dxc4 (Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation)

8. a3White

White plays a3, forcing your hand. You have pinned that knight for a long time, but now you must act. This is the critical junction of the exchange variation where the structure is about to change.

8... Bxc3Black · your move

Capture the knight on c3. This trade is the point of your opening strategy. You damage White's pawn structure and remove a key defender of the center in exchange for your dark-squared bishop.

9. bxc3White

White recaptures with bxc3. The pawn structure is now transformed. White has the bishop pair and a massive center, but the c-pawns are weak and targets for your pieces in the upcoming middlegame.

Where you stand

The position is dynamically balanced. White possesses the bishop pair and a powerful central pawn mass, aiming for a kingside attack. Black focuses on the doubled c-pawns and seeks to block the center, often using the c4-square as a permanent home for a knight. The battle revolves around whether White's bishops can open the position or if Black's structural advantages prevail.

• c6-a5 Maneuver knight to pressure c4
• c1-a3 Develop bishop to active diagonal
• f6-e4 Occupy central outpost with knight
• f1-e1 Centralize rook to support e4
• d5-c4 Fix the doubled pawn structure