Queen's Gambit Accepted - Linares variation
1. d4 d5 2. c4 dxc4 3. e4 c5 4. d5 Nf6 5. Nc3 b5
White advances the queen's pawn to d4. Black pushes the queen's pawn to d5. White pushes the c-pawn to c4.
Black captures on c4 with the queen's pawn. White advances the king's pawn to e4. Black pushes the c-pawn to c5.
White advances the queen's pawn to d5. Black develops the knight to f6. White develops the knight to c3.
Black advances the b-pawn to b5.