The Main Line is a variation of the Blumenfeld Countergambit Accepted, catalogued as ECO E10. The line runs 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. dxe6 fxe6 6. cxb5 d5, reaching the position shown below after 12 half-moves.
Black holds the centre with pawns on d5. Development is level at one minor pieces each, and White is up a pawn of material. It is White to move after six moves. White has doubled pawns on the b-file; Black’s a-file pawn is isolated.
On the Blumenfeld Countergambit Accepted generally: ECO E10. A chess opening with 1 known variation.
You can play through this variation move by move in your browser — Learn mode walks the line with an explanation at each step, and Drill mode replays it from memory so you find out whether you actually know it. No account is required.
All Blumenfeld Countergambit Accepted variations
The Main Line goes 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. dxe6 fxe6 6. cxb5 d5. It is a variation of the Blumenfeld Countergambit Accepted and is catalogued as ECO E10.
The Main Line is ECO E10. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Blumenfeld Countergambit Accepted.
Stockfish evaluates the position after 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. dxe6 fxe6 6. cxb5 d5 at +0.61 at depth 18, which is a small but real edge for White. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
Black holds the centre with pawns on d5. Development is level at one minor pieces each, and White is up a pawn of material. It is White to move. White has doubled pawns on the b-file; Black’s a-file pawn is isolated.