In the middle 1980's I was eager to find a new aggressive weapon against 1.d4. I considered the Blumenfeld gambit (1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 b5). Its defect was that White could avoid it with 3.Nc3 or 3.g3, but its ideas in general attracted me. So I considered the "accelerated" Blumenfeld. The positions which occurred after 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 e6 5.Nc3 exd5 6.Nxd5 Bb7 7.Nxf6 (7.Nc3 d5) Qxf6 looked okay for Black. Yet there was there a refutation, namely 7.e4! Black will be crushed if he plays 7...Nxe4, which has been proven in many games. If Black doesn't take the e4-pawn, he is strategically lost. This line simply doesn’t work.