Bluemenfeld gambit leads to a Benoni kind of position , but with an extra move e6 . As it's in Benoni , here too black trying to challenge white's central "d" pawn out of the first moves . I play this opening regularly in blitz , as it's very dynamic , sharp and challenging defense by black.

http://www.mediafire.com/watch/5n2zspcgicok1o1/bluemenfeld.mp4