Slav Defense
The Queen's Gambit Declined without the bad bishop - and one of the soundest defences in chess.
| First moves | 1.d4 d5 2.c4 c6 |
|---|---|
| ECO codes | D10-D19; the Semi-Slav is D43-D49 |
| Character | Solid, flexible, structurally healthy |
| Best for | QGD players who want the c8-bishop active |
Open any line on the analysis board, or play it out against a bot from where it ends.
Related openings
Queen's Gambit
The most respected way to open with 1.d4, and the opening that gives its name to everything from the Slav to the Semi-Slav.
Nimzo-Indian Defense
The most respected defence to 1.d4 - Black pins the knight, fights for e4, and hands White doubled pawns to argue about for forty moves.
London System
One setup against almost everything. The most popular opening at club level - and the most complained about.
The point of 2...c6
Black supports d5 with the c-pawn instead of the e-pawn, leaving the c8-bishop free to come to f5 or g4. That single difference from the QGD changes the whole character: Black's pieces are more active, and the endgames are often perfectly comfortable.
The trade-off is that the c-pawn is no longer available for the freeing break ...c5, so Black usually needs two moves (...c6 then ...c5) to challenge the centre.
Main lines
- Main line (4...dxc4 5.a4 Bf5) - Black grabs the pawn on c4 after getting the bishop out, and White regains it with a4 and e3/Bxc4. The resulting middlegames revolve around the b4 square that a4 weakened.
- Semi-Slav (4...e6) - Black plays both ...c6 and ...e6, accepting the shut-in bishop for a very sturdy centre and the ...dxc4 and ...b5 plan. The Botvinnik and Anti-Moscow variations here are among the sharpest lines in modern chess.
- Exchange Slav (3.cxd5) - symmetrical and quiet, often used as a drawing weapon. Black should not relax: the extra tempo means White has a small but real initiative.
What to study first
Learn the move order carefully. The difference between 4...dxc4 (main line) and 4...e6 (Semi-Slav) commits you to two very different sets of positions, and there are transposition traps in both directions.
Replay a few Slav games on the analysis board with the opening explorer open. Because the Slav is transposition-heavy, seeing which move orders actually occur at your level is more useful than memorising a tree.
Frequently asked questions
Is the Slav Defense good for beginners?
The main ideas are accessible - defend d5, develop the bishop, take on c4 when it helps - but the move-order subtleties and the sharp Semi-Slav lines can be punishing. It is a good second 1.d4 defence once you are comfortable with the QGD.
What is the difference between the Slav and the Semi-Slav?
The Slav keeps the c8-bishop free by playing ...c6 without ...e6. The Semi-Slav plays both, blocking the bishop in return for an extremely solid centre and a dangerous ...dxc4/...b5 counterattack.