ECO E10
Blumenfeld Countergambit Accepted
The position after 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.dxe6 fxe6 6.cxb5 d5.
1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. dxe6 fxe6 6. cxb5 d5
Blumenfeld Countergambit Accepted is filed under ECO E10. It is the position after 1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5 5.dxe6 fxe6 6.cxb5 d5 — 12 half-moves in, with White to move. Named theory ends here; beyond this the position is yours to work out.