Catalan: 4...c6 5.Nf3

Before the first move

The Catalan Opening combines the central control of the Queen's Gambit with a powerful kingside fianchetto. White aims for long-term pressure along the h1-a8 diagonal, while Black seeks to build a solid wall with pawns on d5, e6, and c6, challenging White to prove the worth of the light-squared bishop.

1. d4White · your move

Move your pawn to d4. This classic opening move claims space in the center and opens lines for your queen and dark-squared bishop. You are preparing to control the game through central dominance and solid structure.

1... Nf6Black

Black replies Nf6, the most popular and flexible response to d4. By developing the knight, Black controls e4 and d5 without committing any pawns yet. Alternatives like the Englund Gambit with e5 or the solid e6 are much rarer and often more provocative.

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

2. c4White · your move

Push your pawn to c4. This is the standard follow-up to d4, putting pressure on the d5-square and preparing to expand on the queenside. You are inviting Black into the complex world of the Queen's Gambit or Indian defenses.

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 chooses e6, a move that signals a solid, classical approach. By supporting d5, Black prepares for a sturdy center. Other sharp responses like the King's Indian with g6 or the Benoni with c5 would lead to much more volatile and tactical positions.

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

3. g3White · your move

Push your pawn to g3. This move is the hallmark of the Catalan. You are preparing to fianchetto your bishop to g2, where it will exert immense pressure along the long diagonal and provide a safe home for your king after castling.

Other paths here: Qb3 (Indian Defense) · g4 (Indian Defense: Devin Gambit) · Bg5 (Indian Defense: Seirawan Attack) · a3 (Queen's Pawn: Anti-Nimzo-Indian)

3... d5Black

Black strikes back with d5, the most principled response. By occupying the center, Black dares White to resolve the tension. Black could also try the Catalan's sharp alternatives like Bb4+ to disrupt White's development or the Hungarian Gambit with e5.

Other paths here: e5 (Catalan Opening: Hungarian Gambit) · Bb4+ (Catalan: 3...Bb4+) · c5 (Catalan: 3...c5) · c6 (Catalan: 3...c6)

4. Bg2White · your move

Fianchetto your bishop to g2. This is your star piece in the Catalan. From here, it radiates power along the h1-a8 diagonal, eyeing the queenside and making it very difficult for Black to develop their light-squared bishop comfortably.

Other paths here: Nf3 (Catalan: 4.Nf3)

4... c6Black

Black opts for c6, signaling a very solid defensive setup. This creates a sturdy pawn triangle. Black had other options: taking the pawn with dxc4 leads to the 'Open Catalan,' while Bb4+ or Be7 are also highly respected ways to handle the pressure.

Other paths here: Bb4+ (Catalan: 4...Bb4+) · c5 (Catalan: 4...c5) · dxc4 (Catalan Opening: Open Defense) · Be7 (Catalan: Closed)

5. Nf3White · your move

Develop your knight to f3. This move controls the center, prepares for castling, and adds a layer of protection to your d4 pawn. You have completed your initial setup and are ready to fight for a middlegame advantage.

Other paths here: Qc2 (Catalan: 4...c6 5.Qc2)

Where you stand

The position is a classic Closed Catalan. White will likely castle kingside and look to expand with b3 and Bb2 or exert pressure with Qc2. Black's goal is to complete development with Be7 and O-O, eventually seeking to challenge the center with c5 or b6 to liberate the light-squared bishop. The battle revolves around White's long-range bishop versus Black's solid pawn wall.

• e1-g1 Castle kingside to secure your king.
• f8-e7 Develop the bishop to prepare castling.
• d1-c2 Place the queen to support c4.
• c6-c5 Strike at the center with c5.
• b1-d2 Bring the knight to support d4.