Slav Defense: Czech Variation, Classical System, Main Line

Before the first move

The Slav Defense is a rock-solid response to the Queen's Gambit, focusing on a sturdy pawn on c6. In the Czech Variation, you'll temporarily give up the center to develop your light-squared bishop actively before White can lock it in. This leads to a rich, strategic battle where White seeks central control and Black fights for counterplay.

1. d4White

White starts with d4, the most common alternative to e4. This move controls e5 and prepares to challenge the center. You'll have many ways to respond, including the King's Indian, the Nimzo-Indian, or the solid Queen's Gambit Declined.

1... d5Black · your move

Move your pawn to d5. By matching White's central claim, you prevent them from grabbing more space with e4 and set the stage for a symmetrical structure where every square counts.

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

2. c4White

White plays c4, the signature move of the Queen's Gambit. White is testing your resolve in the center. While White could play the London System with Bf4 or the Chigorin with Nc3, c4 remains the most principled and ambitious try for an advantage.

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 · your move

Move your pawn to c6. This is the Slav Defense. Unlike the Queen's Gambit Declined where you block your bishop with e6, here you bolster d5 while keeping the path clear for your bishop on c8 to develop.

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

White plays Nf3, a standard developing move that prevents Black from playing e5. White could also play Nc3 immediately or the Exchange Variation with cxd5, but Nf3 is the most common way to maintain pressure without committing the other knight yet.

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

3... Nf6Black · your move

Develop your knight to f6. This is a natural developing move that mirrors White's knight, controls the d5 and e4 squares, and prepares your kingside for castling.

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. Nc3White

White develops the second knight to c3, intensifying the pressure on d5. Alternatives like e3 or the more positional Qb3 are less direct. This move forces you to decide how to handle the tension in the center.

Other paths here: Bg5 (Slav Defense: Bonet Gambit) · Nbd2 (Slav Defense: Breyer Variation) · e3 (Slav Defense: Quiet Variation) · Qb3 (Slav: 4.Qb3)

4... dxc4Black · your move

Capture the pawn on c4. By taking now, you force White to spend time reclaiming the pawn with a piece, and more importantly, you ensure your light-squared bishop can jump out to f5 before the door closes.

Other paths here: a6 (Slav Defense: Chebanenko Variation) · g6 (Slav Defense: Schlechter Variation) · Qb6 (Slav Defense: Süchting Variation) · Bf5 (Slav: 4.Nc3 Bf5)

5. a4White

White plays a4, a standard response to stop you from defending the c4 pawn with b5. White could have gambited the pawn with e4, the Geller Gambit, but a4 is the more controlled, classical approach.

Other paths here: e3 (Slav Defense: Alekhine Variation) · e4 (Slav Defense: Geller Gambit) · Ne5 (Slav: Accepted, 5.Ne5)

5... Bf5Black · your move

Develop your bishop to f5. This is the key to the Czech Variation. You bring the bishop outside the pawn chain before playing e6, creating an active and harmonious piece setup.

Other paths here: Na6 (Slav Defense: Smyslov Variation) · e6 (Slav Defense: Soultanbeieff Variation) · Bg4 (Slav Defense: Steiner Variation) · Nd5 (Slav: 5.a4 Nd5)

6. e3White

White plays e3, preparing to take back on c4. White sometimes tries the more aggressive Ne5 or Nh4 to harass your bishop, but e3 is the most solid and reliable way to continue the development.

Other paths here: Nh4 (Slav Defense: Czech Variation, Bled Attack) · Ne5 (Slav Defense: Czech Variation, Krause Attack)

6... e6Black · your move

Move your pawn to e6. Now that your bishop is safely outside the pawn chain, you can solidify your center and open the way for your dark-squared bishop to enter the game.

Other paths here: Na6 (Slav Defense: Czech Variation, Lasker Variation)

7. Bxc4White

White recaptures the pawn with Bxc4. White has regained the material and now has a very harmonious position. You must now decide how to finish your development and challenge White's central control.

7... Bb4Black · your move

Slide your bishop to b4. This pins the knight on c3 to the king, indirectly pressuring the d4 pawn and preparing for castling. It is an active way to challenge White's coordination.

8. O-OWhite

White castles, prioritizing king safety. This is the most natural move. White is now fully developed and ready to launch an initiative in the center, often starting with the move Qe2.

8... O-OBlack · your move

Castle kingside. Just like White, you prioritize king safety. Your position is very solid, and your pieces are well-coordinated. You are ready for the upcoming central battle.

Other paths here: Nbd7 (Slav: Dutch, 8...Nbd7)

9. Qe2White

White plays Qe2, the main line of the Czech Slav. This move prepares the e4 push. White could have tried Nh4 to hunt your bishop or the more modest Qb3, but Qe2 is the most ambitious and direct.

Other paths here: Nh4 (Slav: Dutch, 8...O-O 9.Nh4) · Qb3 (Slav: Dutch, 8...O-O 9.Qb3)

Where you stand

The position is balanced but full of tension. White's main plan is to push e4 to control the center, while Black focuses on maintaining the blockade on d5 and potentially striking back with c5 or e5. Both sides have finished development, and the battle will now revolve around piece maneuvering and central pawn breaks. Watch for White's e4 push and Black's pressure on the d4 pawn.

• e2-e4 White prepares the e4 central break.
• f5-g6 Black maneuvers the bishop to safety.
• b8-d7 Black develops the knight to d7.
• f1-d1 White brings the rook to d1.