Queen's Indian: 4.e3 Bb4+

Before the first move

The Queen's Indian Defense is a sophisticated hypermodern opening where Black controls the center with pieces rather than pawns. By playing an early b6, Black aims to exert pressure from the flank, while White seeks to build a solid, classical center. This specific line with 4.e3 leads to a sturdy, strategic battle for both sides.

1. d4White · your move

Push your pawn to d4. This move immediately claims space in the center and opens lines for your queen and dark-squared bishop. It is the foundation of many solid positional systems where you aim to dictate the pace of the game from the very first move.

1... Nf6Black

Black replies with Nf6, the most flexible answer to d4. This move prevents White from grabbing a dual-pawn center with e4. Other options like the Englund Gambit with e5 or the Dutch Defense with f5 lead to much sharper, more volatile games very early on.

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

2. c4White · your move

Advance your pawn to c4. This move reinforces your control over the d5 square and prepares to gain even more space on the queenside. It is the hallmark of the Queen's Gambit and Indian systems, inviting a complex struggle for the center of the board.

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

Black plays e6, a solid move that prepares for central development. This often leads to the Queen's Gambit Declined or the Nimzo-Indian. Black could also try the more aggressive Benoni with c5 or the King's Indian setup with g6, but e6 is the most classical choice.

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

3. Nf3White · your move

Bring your knight to f3. This move develops a piece toward the center, prepares for kingside castling, and avoids the pin that would occur if you played Nc3. It is a very flexible developing move that keeps Black guessing about your exact setup.

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

3... b6Black

Black chooses b6, entering the Queen's Indian Defense. This hypermodern approach focuses on controlling e4 from a distance. Alternatively, Black could play d5 to enter a Queen's Gambit Declined or c5 to challenge the center immediately in a Benoni-style structure.

Other paths here: d5 (Queen's Gambit Declined) · Ne4 (Indian Defense: Döry Indian) · a6 (Indian Defense: Dzindzi-Indian Defense) · Be7 (Neo-Indian: 3.Nf3 Be7)

4. e3White · your move

Move your pawn to e3. This solidifies your center and opens the path for your light-squared bishop to develop. While less aggressive than the Fianchetto Variation with g3, it creates a very sturdy structure that is difficult for Black to break down.

Other paths here: Nc3 (Queen's Indian Defense: Kasparov Variation) · Bf4 (Queen's Indian Defense: Miles Variation) · a3 (Queen's Indian Defense: Petrosian Variation) · Bg5 (Queen's Indian: 4.Bg5)

4... Bb4+Black

Black plays Bb4+, a provocative check. This forces White to block, usually with the knight or bishop. The main alternative is the simple Bb7, but this check aims to disrupt White's coordination before the light-squared bishop finds its home on the long diagonal.

Other paths here: Bb7 (Queen's Indian: 4.e3 Bb7)

Where you stand

The position is balanced and rich with maneuvering possibilities. White will likely block the check with the knight and continue development with Bd3 and castling. Black will focus on finishing development with Bb7 and d6 or d5, aiming to challenge White's central space while maintaining a solid, flexible pawn structure for the middlegame.

• b1-d2 Develop the knight to block the check
• c8-b7 Fianchetto the bishop to control the diagonal
• f1-d3 Place the bishop on an active square
• e8-g8 Secure the king through kingside castling