Slav Defence
1.d4 d5 2.c4 c6
The Slav is one of the soundest answers to the Queen's Gambit. Rather than locking in the light bishop with ...e6, Black props up d5 with ...c6 – a small change with big consequences. The bishop stays free to swing to f5, Black gets rock-solid footing, and the result has served world champions from Euwe to Carlsen.
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What it does
Black answers 1.d4 d5 2.c4 with 2...c6, defending the d5 pawn with a pawn rather than a piece. This keeps the c8-bishop's diagonal open, curing the Queen's Gambit Declined's main problem child. Often Black plays ...dxc4 and ...Bf5, developing the bishop actively before sealing the centre with ...e6. The structure is durable; the battle revolves around the c4/c5 and e4/e5 breaks, control of e4 and e5, and whether White can convert a small space edge into lasting pressure.
When to use it
Choose the Slav when you face 1.d4 and want a reply that is solid, principled and theoretically watertight, yet less passive than the classical Queen's Gambit Declined. It suits players who like clear strategic plans, a healthy pawn structure and a good bishop rather than sharp tactical chaos – though sharp lines exist if you want them. It is an excellent practical weapon against club opponents and a fully respectable choice at the highest level.
Why it works
By guarding d5 with the c-pawn, Black solves the classic Queen's Gambit dilemma of the boxed-in light bishop, which can develop actively to f5 or g4 before ...e6 is played. The structure is hard to crack: Black has clear development and few weaknesses. If White grabs space, Black undermines with ...dxc4 and ...b5, or strikes back with ...c5 or ...e5 at the right moment. This blend of solidity and resilience is why the Slav is regarded as one of the very best ways to meet 1.d4.
Key ideas
- Defend d5 with ...c6 so the light bishop stays free to develop to f5 or g4.
- Take on c4 (...dxc4) and try to hold the pawn with ...b5, or give it back for activity.
- Use the ...c5 or ...e5 break to challenge White's central space.
- Complete a harmonious setup: ...e6, ...Bd6 or ...Be7, ...O-O, ...Nbd7.
- Avoid weakening the queenside; meet a4 carefully when clinging to the c4 pawn.
Watch out
A well-known pitfall in the ...dxc4, ...Bf5 lines is grabbing greedily for material. After an early ...b5 to cling to the c4 pawn, White breaks with a timely a4, and if Black is careless the queenside pawns fragment and fall. Use the ...b5 and ...a6 ideas only with the correct move order – know the theory before hanging on to the extra pawn.