Chess puzzle (Advantage)
Opening: Scotch_Game, Scotch_Game_Classical_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qf6 5. Nxc6 Bc5 6. Qd2 Qxc6 7. Bd3 Nf6
8. b4 Be7 9. b5 Qb6 10. O-O O-O 11. Qg5 h6 12. Qh4 d6 13. Be3 Qa5 14. a4 Bd7
15. Nd2 c6 16. Nb3 Qc7 17. c4 Be6 18. a5 Nd5 19. exd5 *
Position (FEN): r4rk1/ppq1bpp1/2ppb2p/PP1P4/2P4Q/1N1BB3/5PPP/R4RK1 b - - 0 19
Black to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 871
Best move: Bxh4