Slav: 4.e3 Bf5 5.Qb3

Before the first move

The Slav Defense is a rock-solid response to the Queen's Gambit, where Black uses the c-pawn to support the center. This specific line explores what happens when Black develops their bishop early, allowing White to launch an immediate double attack against the queenside.

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. It is the foundation of many strategic systems where you aim for long-term control rather than immediate tactical fireworks.

1... d5Black

Black replies d5, meeting strength with strength. This solid response is the main line, though you might also encounter the sharp Englund Gambit with e5, the flexible Horwitz Defense with e6, or even the offbeat Australian Defense using Na6 to challenge the center indirectly.

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

2. c4White · your move

Move your pawn to c4. This is the Queen's Gambit, offering a pawn to lure Black's d-pawn away from the center. Even if Black doesn't take it, you create tension and prepare to open the c-file for your rook later in the game.

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 plays c6, opting for the Slav Defense. This is a very sturdy choice that prepares to support d5 without trapping the bishop on c8. You could also see the Austrian Defense with c5 or the Baltic Defense with an immediate Bf5, but c6 is the gold standard.

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 natural developing move controls the e5 and d4 squares while preparing for kingside castling. It is a flexible choice that keeps your options open before committing your other pieces or deciding on a central pawn structure.

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

3... Nf6Black

Black replies Nf6, continuing the symmetrical development. This is the most common response, though Black sometimes tries the more provocative Bg4 to pin the knight or the immediate Bf5. By playing Nf6, Black remains solid and ready for any central transformation.

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 d4-pawn and opens the path for your light-squared bishop. While it temporarily boxes in your dark-squared bishop, it creates a very stable center that is difficult for Black to break down in the middle game.

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, the point of the Slav setup. By getting the bishop outside the pawn chain before playing e6, you avoid the 'bad bishop' problem. You might also see the Quiet Variation with e6 or the Pin Defense with Bg4, but Bf5 is the most active choice.

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. Qb3White · your move

Slide your queen to b3. This is a classic double attack in the Slav. You are simultaneously pressuring the d5-pawn and the undefended b7-pawn. Black is now forced to make a difficult decision about how to defend their queenside while maintaining their central presence.

Other paths here: Bd3 (Slav: 4.e3 Bf5 5.Bd3) · cxd5 (Slav: 4.e3 Bf5 5.cxd5) · Nc3 (Slav: 4.e3 Bf5 5.Nc3)

Where you stand

The position is strategically rich. White has gained the initiative by attacking b7, forcing Black to decide between a queen trade on b6 or a defensive stance. White will aim to expand on the queenside with c5, while Black looks to solidify the center with e6 and complete development. The battle revolves around whether Black's active bishop can compensate for the queenside pressure.

• b3-b6 Force a queen trade to weaken Black's structure
• b1-c3 Develop the knight to increase central pressure
• d8-b6 Challenge the white queen and defend b7
• e7-e6 Solidify the center and open the dark bishop