Chess puzzle (Advantage)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 h6 4. d4 Qe7 5. d5 Nb8 6. Nc3 Nf6 7. b3 Qd8 8. Nxe5
Qe7 9. Nxf7 Qxf7 10. d6 Qg6 11. dxc7 Qxg2 12. Rf1 Nc6 13. Bb2 Nxe4 14. Qh5+ Ke7
15. Qh4+ Ng5 16. Nd5+ Kd6 17. Qf4+ Kc5 18. b4+ Nxb4 19. Qd4+ Kc6 20. Nxb4+ *
Position (FEN): r1b2b1r/ppPp2p1/2k4p/6n1/1NBQ4/8/PBP2PqP/R3KR2 b Q - 0 20
Black to move.
Themes:  Middlegame  
Puzzle rating: 1238
Best move: Bxb4+