Blumenfeld_Gambit
Blumenfeld Countergambit
Chess opening
The Blumenfeld Countergambit is a chess opening characterised by the moves 3...e6 4.Nf3 b5 in the Benoni Defense arising after:
or alternatively:
In fact, as many as 30 different move orders are possible.[1] The Encyclopaedia of Chess Openings sorts the Blumenfeld Countergambit under code E10 (1.d4 Nf6 2.c4 e6 3.Nf3).