d4 Nf6 c4 e6 Nf3 c5 d5 b5
| Blumenfeld counter-gambit Dus-Chotimursky variation (E10) Bg5 | Bg5 Blumenfeld counter-gambit Dus-Chotimursky variation (E10) |
| Blumenfeld counter-gambit accepted (E10) de fe cb d5 | de fe cb d5 Blumenfeld counter-gambit accepted (E10) |