Nimzo-Indian Defense: St. Petersburg Variation

Before the first move

The Nimzo-Indian Defense is a hypermodern masterpiece where Black controls the center with pieces rather than pawns. In the St. Petersburg Variation, White uses the knight on e2 to avoid doubled pawns on the c-file. You will battle for the dark squares while White tries to build a massive pawn center and claim the bishop pair.

1. d4White

White starts with d4, a solid and ambitious opening move that controls the e5-square. By avoiding the immediate tactical chaos of e4, White invites a positional battle. You can respond with many moves, but Nf6 is the most flexible way to keep your options open.

1... Nf6Black · your move

Develop your knight to f6. This is a flexible, hypermodern response that prevents White from immediately playing e4. You are keeping your central options open while preparing to see how White intends to reinforce their d4 pawn.

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

2. c4White

White plays c4, expanding their footprint in the center and preparing to develop the knight to c3. This is the most testing continuation. White could also try the London System with Bf4 or the Trompowsky with Bg5, but c4 leads to the most complex mainlines.

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 the center and opens the diagonal for your king's bishop. You are preparing to challenge White's center, likely with a future d5 or by pinning the knight on c3.

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 threatening to take full control of the center with e4. This is the critical moment where you must decide how to react. While the Catalan with g3 is a major alternative, Nc3 invites the most famous pin in chess.

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 and pin that knight to the king. This is the defining move of the Nimzo-Indian Defense. You are neutralizing White's influence over the e4-square and preparing to trade your bishop for the knight to damage White's pawn structure.

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 plays e3, choosing a solid and reliable setup. This is the most common response to the Nimzo-Indian. White could also try the sharp f3 variation or the Three Knights Variation with Nf3, but e3 prioritizes safe development and a solid center.

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... b6Black · your move

Push your pawn to b6. You are preparing to fianchetto your queen's bishop to b7, where it will exert great pressure along the long diagonal. This challenges White's control of the e4 and d5 squares from a distance.

Other paths here: Nc6 (Nimzo-Indian Defense: Rubinstein System, Taimanov Variation) · c5 (Nimzo-Indian Defense: Rubinstein System) · O-O (Nimzo-Indian Defense: Normal Variation) · Ne4 (Nimzo-Indian Defense: St. Petersburg Variation)

5. Ne2White

White plays Ne2, a clever maneuver that avoids the usual doubled pawns on the c-file. This move signals that White wants to keep their structure clean, even if it delays kingside development slightly. Alternatives like Bd3 or Nf3 lead to more traditional Nimzo-Indian battles.

Other paths here: Bd3 (Nimzo-Indian: Nimzowitsch, 5.Bd3) · Nf3 (Nimzo-Indian: Nimzowitsch, 5.Nf3)

Where you stand

The position is balanced but full of tension. White has avoided doubled pawns and intends to expand in the center with a3 and f3. Black will finish development with Bb7 and O-O, focusing on the dark squares. The game will revolve around whether White can use their space and bishop pair or if Black's superior coordination will prevail.

• c8-b7 Fianchetto the bishop to pressure e4
• e8-g8 Secure the king behind the pawns
• a2-a3 Force the bishop to declare its intent
• e2-c3 Recapture on c3 to maintain structure
• f2-f3 Prepare for central expansion with e4