Benko Gambit
The Benko Gambit is a chess opening characterised by the move 3...b5 in the Benoni Defence arising after:
1. d4 Nf6
2. c4 c5
3. d5 b5
Black sacrifices a pawn for enduring queenside pressure. White can accept or decline the gambit pawn. Wikipedia
ECO: A57–A59
Moves: 1.d4 Nf6 2.c4 c5 3.d5 b5
Named after: Pal Benko; Volga River
Synonym(s): Volga Gambit; Volga-Benko Gambit