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. By pinning the knight on c3, you restrain White's central expansion and prepare to strike back. The St. Petersburg Variation adds a twist by preparing a long-range fianchetto for the light-squared bishop.

1. d4White

White starts with d4, a move that focuses on central control and solid development. By occupying the center, White invites a variety of responses. While d4 is the main choice here, you might also see e4 leading to open games or c4, the English Opening, in other encounters.

1... Nf6Black · your move

Develop your knight to f6. This flexible move prevents White from immediately playing e4 and prepares for various responses against the queen's pawn. You keep your options open while developing a piece to its most natural square.

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

2. c4White

White plays c4, signaling the intent to enter a Queen's Gambit or an Indian system. By challenging the d5-square, White asks you how you intend to fight for the center. Alternatives like the London System with Bf4 or the Trompowsky with Bg5 are also frequent at this stage.

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 over d5 and opens the diagonal for your king's bishop. You are preparing to challenge White's center while maintaining a flexible pawn structure.

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, the most principled development. By placing the knight here, White threatens to play e4 and take full control of the center. To stop this, you can play the Nimzo-Indian with Bb4 or the Queen's Gambit Declined with d5.

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 knight is the defining move of the Nimzo-Indian Defense. You are neutralizing White's pressure on the center and preparing to trade the bishop for the knight if necessary.

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, a solid and flexible choice. By reinforcing d4 and opening the path for the bishop on f1, White aims for a slow, positional build-up. Other major tries include the sharp 4.f3 or the Classical 4.Qc2, 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... b6Black · your move

Move your pawn to b6. This prepares to fianchetto your bishop on b7, where it will exert great pressure along the long diagonal. This characterizes the St. Petersburg Variation, aiming for a harmonious development of your minor pieces.

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)

Where you stand

The position is rich with strategic depth. White will likely develop the kingside with Ne2 and Bd3 to avoid the doubling of pawns on the c-file. Black will fianchetto the bishop on b7 and look for the right moment to strike at the center with c5 or d5. Both sides have clear development paths and a complex middlegame ahead.

• c8-b7 Fianchetto the bishop to control e4
• g1-e2 Develop the knight to avoid doubled pawns
• e8-g8 Secure the king and activate the rook
• f1-d3 Develop the bishop to an active diagonal
• c7-c5 Challenge the white center with a pawn break