Blumenfeld Countergambit

Blumenfeld Countergambit
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Moves1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nf3 b5
ECOE10
Named afterBenjamin Blumenfeld
ParentBenoni Defense

The Blumenfeld Countergambit is a chess opening characterised by the moves 3...e6 4.Nf3 b5 in the Benoni Defense 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

In fact, as many as 30 different move orders are possible. The Encyclopaedia of Chess Openings sorts the Blumenfeld Countergambit under code E10 (1.d4 Nf6 2.c4 e6 3.Nf3).