Blumenfeld Gambit (E10)

The Blumenfeld Gambit is a chess opening characterised by the moves 3…e6 4.Nf3 b5 in the Benoni Defence arising after: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nf3 b5 or alternatively: 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 Black sacrifices a wing...