Queen's Gambit Declined: Baltic Defense, Pseudo-Slav
The Pseudo-Slav arises when Black meets 3.c4 with ...e6 and 4.Nc3 with ...c6, putting the f5 bishop outside a Slav-style pawn chain. White now probes the empty b7 square and the active bishop, while Black wants a solid c6-d5-e6 wall with quick development.
- Moves
- 1.d4 d5 2.Nf3 Bf5 3.c4 e6 4.Nc3 c6
- ECO
- D02
- Engine
- +0.54 · a slight edge for White (Stockfish 17.1, depth 20)
- Played
- 1,496 games in our lichess sample
- White scores
- 51.8%
Key ideas for both sides
White
- 5.Qb3 at once hits b7, which lost its guard when the bishop went to f5, and also adds pressure to d5.
- Bf4 offers a trade of dark bishops; after ...Bd6 and Bxd6 Qxd6, White's knight can go to h4.
- Nh4 chases the f5 bishop. Taking it with the knight gives White the bishop pair in a closed center.
- A calmer path is e3, Bd3 and castling, accepting a bishop trade on d3 and a slow middlegame.
Black
- Meet Qb3 with ...Qc7 or ...Qb6, guarding b7 without loosening the c6-d5 chain.
- Answer Bf4 with ...Bd6 to trade the active White bishop, then develop with ...Ne7 or ...Nf6.
- Keep a retreat for the f5 bishop. ...Bg6 or ...Be4 avoids losing it to Nh4.
- Develop with ...Nd7 and ...Ngf6 and castle short; the pawn wall makes Black's king safe.
Plans and pawn structure
The c6-d5-e6 chain is very hard to break, so White plays on the queenside and against the light bishop. Qb3 with Bf4 asks Black to solve b7 and the c7 square at once, and in the top line the queens come off with White a bit more active. Black wants ...Nd7, ...Ngf6, ...Be7 and castling, then a freeing ...dxc4 or ...c5. If the f5 bishop gets traded for a knight, Black's position is solid but passive.
What the engine plays from here
Stockfish 17.1 at depth 20 rates the position +0.54: a slight edge for White. Its three top choices for White:
- +0.54 5.Qb3 Qc7 6.Bf4 dxc4 7.Bxc7 cxb3
- +0.21 5.Bf4 Bd6 6.Bxd6 Qxd6 7.Nh4 Be4
- +0.11 5.e3 Nd7 6.Bd3 Bxd3 7.Qxd3 Ngf6
Pawns, from White's side.
How it scores on lichess
1,496 rated lichess games reached this position; White scored 51.8%.
Light: White wins. Grey: draws. Dark: Black wins. About the sample.
How to play against it
As White, start with Qb3 and make Black defend b7 right away. Follow with Bf4 to aim at c7 and keep a knight jump to h4 in reserve. Avoid slow play like e3 and Bd3 too early, because it lets Black trade the problem bishop and equalize.
Questions
What are the moves of the Queen's Gambit Declined: Baltic Defense, Pseudo-Slav?
The Queen's Gambit Declined: Baltic Defense, Pseudo-Slav starts 1.d4 d5 2.Nf3 Bf5 3.c4 e6 4.Nc3 c6. Its ECO code is D02.
Is the Queen's Gambit Declined: Baltic Defense, Pseudo-Slav good for Black?
Stockfish 17.1 rates the position +0.54 at depth 20, which is a slight edge for White. In 1,496 lichess games from our sample, White scored 51.8%. A solid system for Black players who like a firm center, but it asks for care against Qb3 and early knight jumps.
What is the main idea of the Queen's Gambit Declined: Baltic Defense, Pseudo-Slav?
Black has developed the light bishop to f5 before closing the center with ...e6 and ...c6. White tries to punish the weak b7 square with Qb3 and to hunt the bishop with Nh4.
What should White play next?
The engine's first choice is Qb3, with Bf4 and e3 close behind. 5.Qb3 targets b7 and d5 together, the two points the f5 bishop no longer covers.
Related lines
Updated October 2026. Sources and method.