Chess openings · ECO D10–D19 · Updated October 10, 2026

Slav Defense: main line, plans and pitfalls

The Slav Defense supports d5 with the c-pawn, so Black keeps the light-squared bishop free (unlike the Queen’s Gambit Declined). It is one of Black’s most reliable answers to the Queen’s Gambit.

Starts with: 1.d4 d5 2.c4 c6 · ECO: D10–D19

Main line

Slav main line with 5...Bf5

Black takes on c4, and after White’s a4 develops the bishop to f5 before playing ...e6. Stockfish: about +0.5.

Pitfall: holding the pawn with ...b5

5...b5? 6.axb5 cxb5 7.Nxb5

The queenside collapses and White wins the pawn back with a better position (Stockfish about +1.7 after 5...b5).

Plans

Black

Develop the bishop to f5 or g4 before ...e6.
Free the position with ...c5 or ...e5.

White

Regain c4 with e3 and Bxc4, or Ne5xc4.
Use the central majority with e4.

Frequently asked questions

Is the Slav Defense good for beginners?

Yes. It is solid, logical and keeps Black’s pieces active.

Slav or Queen’s Gambit Declined?

Both are excellent. The Slav keeps the light-squared bishop free; the QGD is more classical and very solid.

What is the Semi-Slav?

The Semi-Slav combines ...c6 and ...e6, leading to sharp lines such as the Meran and Botvinnik.