Slav: 4.e3 Bf5 5.Bd3

Before the first move

The Slav Defense is a rock-solid response to the Queen's Gambit. In this variation, White chooses a quiet, solid setup with e3, and Black develops the 'problem' light-squared bishop outside the pawn chain. By playing Bd3, White immediately challenges that bishop, leading to a strategic battle over the center and piece activity.

1. d4White · your move

Push your pawn to d4. This move claims central space, controls the e5-square, and opens lines for your queen and dark-squared bishop. It is the foundation of many closed and semi-closed systems.

1... d5Black

Black replies with d5, the most solid response. While alternatives like Nf6 (leading to various Indian Defenses) or the sharp Englund Gambit (e5) are common, d5 directly challenges White's influence in the center.

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 Queen's Gambit. You are offering a side pawn to lure Black's d-pawn away from the center, which would allow you to eventually occupy the middle with your e-pawn.

Other paths here: Qd3 (Amazon Attack) · e4 (Blackmar-Diemer Gambit) · e3 (Queen's Pawn Game) · Bf4 (Queen's Pawn Game: Accelerated London System)

2... c6Black

Black chooses the Slav Defense with c6. This is a very sturdy choice. Other popular paths include the Queen's Gambit Accepted (dxc4) or the Albin Countergambit (e5), but the Slav remains a favorite for its reliability.

Other paths here: c5 (Queen's Gambit Declined: Austrian Defense) · Bf5 (Queen's Gambit Declined: Baltic Defense) · Nf6 (Queen's Gambit Declined: Marshall Defense) · b5 (Queen's Gambit Declined: Zilbermints Gambit)

3. Nf3White · your move

Develop your knight to f3. This is a flexible improving move that controls the e5 and d4 squares while preparing for kingside castling. It keeps your options open before committing your other pieces.

Other paths here: Nc3 (Slav Defense) · e4 (Slav Defense: Diemer Gambit) · cxd5 (Slav Defense: Exchange Variation) · Bf4 (Slav: 3.Bf4)

3... Nf6Black

Black develops with Nf6, maintaining the balance. Black could also try to develop the bishop immediately with Bf5 or Bg4, or even take the pawn on c4, but Nf6 is the most principled and flexible response.

Other paths here: Bf5 (Slav: 3.Nf3 Bf5) · Bg4 (Slav: 3.Nf3 Bg4) · dxc4 (Slav: 3.Nf3 dxc4) · e6 (Semi-Slav Defense: Chigorin Defense)

4. e3White · your move

Push your pawn to e3. This solidifies your center and opens a path for your light-squared bishop. While it temporarily boxes in the dark-squared bishop, it creates a very sturdy pawn structure.

Other paths here: Bg5 (Slav Defense: Bonet Gambit) · Nbd2 (Slav Defense: Breyer Variation) · Qb3 (Slav: 4.Qb3) · Qc2 (Slav: 4.Qc2)

4... Bf5Black

Black plays Bf5, successfully developing the 'problem' bishop outside the pawn chain. Black could also play e6 immediately, entering the Semi-Slav, or try a6 to prepare queenside expansion, but Bf5 is the most active.

Other paths here: Bg4 (Slav Defense: Quiet Variation, Pin Defense) · a6 (Slav: 4.e3 a6) · g6 (Slav: 4.e3 g6) · e6 (Semi-Slav Defense: Quiet Variation)

5. Bd3White · your move

Move your bishop to d3. You are immediately challenging Black's well-placed bishop on f5. If Black trades, you'll recapture with your queen, gaining a central presence and preparing to castle quickly.

Other paths here: cxd5 (Slav: 4.e3 Bf5 5.cxd5) · Nc3 (Slav: 4.e3 Bf5 5.Nc3) · Qb3 (Slav: 4.e3 Bf5 5.Qb3)

Where you stand

The position is balanced and rich in strategic depth. White will likely castle kingside and look to expand in the center with e4 or on the queenside. Black should complete development with e6 and Be7, while deciding whether to trade on d3 or maintain the bishop's tension. Both sides have solid structures and clear paths to a long middlegame struggle.

• e1-g1 Castle kingside to secure the king.
• b1-d2 Develop the knight to d2 or c3.
• e7-e6 Play e6 to solidify and develop.
• f8-e7 Develop the bishop and prepare castling.
• f5-d3 Trade bishops to simplify the position.