Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Austrian_Defense
Moves: 1. d4 d5 2. c4 c5 3. dxc5 e6 4. cxd5 exd5 5. Nf3 Nf6 6. Nc3 Bxc5 7. Bg5 Be7 8.
e3 Be6 9. Be2 Nc6 10. O-O a6 11. Nd4 Nxd4 12. Qxd4 b6 13. Bxf6 Bxf6 14. Qa4+ b5
15. Nxb5 *
Position (FEN): r2qk2r/5ppp/p3bb2/1N1p4/Q7/4P3/PP2BPPP/R4RK1 b kq - 0 15
Black to move.
Themes:  Middlegame  
Puzzle rating: 1354
Best move: axb5