Queens Gambit Accepted (Trap#1)

1. d4 d5
2. c4 cxd4
3. e3 b5
4. a4! c6? (greedily defending the pawn)
5. axb5 cxb5?
6. Qf3 (wins Rook on a8 because neither Knight or Bishop can intervene - and the Black Queen cannot offer help .... )