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Benko Gambit is a chess opening that arises after 1.d4 Nf6 2.c4 c5 3.d5 b5. It is classified A57 in the ECO system, and the position after these moves has white to move.
This position can also be reached by another move order, including 1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 g6 6.Nc3 Bxa6 7.e4 Bxf1 8.Kxf1 d6 9.g3.
Each of these is a named opening reached by playing on from 1.d4 Nf6 2.c4 c5 3.d5 b5. Open any of them to load the position on the board.