ECO D12 · Best studied as White

Slav: 4.e3 Bf5 5.Nc3

  • Central
  • Solid
  • Gambit

What is the Slav: 4.e3 Bf5 5.Nc3?

The Slav Defense is a rock-solid response to the Queen's Gambit, where Black uses the c-pawn to support the center while keeping the light-squared bishop free.

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. Nc3

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Position after 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. Nc3

The lesson

Play through the Slav: 4.e3 Bf5 5.Nc3, move by move

Scroll the moves and watch the board follow along. Every move comes with the idea behind it.

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1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. Nc3

  1. 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 while keeping the light-squared bishop free. In this specific variation, White plays a quiet, solid setup with e3, challenging Black to find an active role for that bishop before the center closes up.

  2. 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 strategic and positional games.

  3. 1... d5Black

    Black replies with d5, the most solid response. While gambits like the Englund or defenses like the Dutch (f5) exist, this move ensures a direct fight for the center. Other common tries include the Horwitz Defense with e6 or the hypermodern Indian Defenses.

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

  4. 2. c4White · your move

    Push your pawn to c4. You are offering a side pawn to lure Black's central pawn away. This is the Queen's Gambit, aiming to eventually dominate the center with your remaining pawns.

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

  5. 2... c6Black

    Black chooses the Slav Defense with c6. This is incredibly sturdy. While the Chigorin (Nc6) or the Austrian (c5) are more aggressive, the Slav is favored at the highest levels for its combination of solidity and counter-attacking potential.

    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)

  6. 3. Nf3White · your move

    Develop your knight to f3. This is a flexible developing move that controls the e5 and d4 squares. It prepares for kingside castling and keeps your central options open for now.

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

  7. 3... Nf6Black

    Black develops the knight to f6. This is the main line of the Slav. Alternatives like Bf5 or Bg4 are possible early 'Quiet' variations, but developing the knight first is the most flexible way to proceed.

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

  8. 4. e3White · your move

    Push your pawn to e3. This solidifies your d4 pawn and opens the path for your light-squared bishop. It is a quiet but effective way to build a strong center before launching an attack.

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

  9. 4... Bf5Black

    Black develops the bishop to f5, taking advantage of the fact that e3 was played. This is a very active square. If you had played e6 instead, you would be entering the Semi-Slav, which is a different strategic beast entirely.

    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)

  10. 5. Nc3White · your move

    Develop your knight to c3. You are increasing the pressure on d5 and preparing to challenge Black's active bishop. This move completes your minor piece development on the queenside.

    Other paths here: Bd3 (Slav: 4.e3 Bf5 5.Bd3) · cxd5 (Slav: 4.e3 Bf5 5.cxd5) · Qb3 (Slav: 4.e3 Bf5 5.Qb3)

  11. Where you stand

    The position is balanced and rich with maneuvering possibilities. White will likely try to hunt the f5-bishop with Nh4 or develop the kingside to castle. Black will play e6 to complete the pawn chain and look to challenge the center with c5 or maintain the solid Slav structure. Both sides must be careful about the timing of central pawn trades.

    • f3-h4 Hunt the active f5 bishop
    • f1-e2 Prepare kingside castling
    • e7-e6 Solidify center and free bishop
    • f8-e7 Complete development and castle

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