Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Classical_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. d5 a6 8. Ba4
Ba5+ 9. Kf1 b5 10. dxc6 bxa4 11. Qxa4 Bb6 12. Nc3 Nf6 13. Bg5 O-O 14. Nd5 Bg4
15. Re1 Re8 16. h3 Be6 17. Nxf6+ gxf6 18. Bh6 f5 19. Nd4 *
Position (FEN): r2qr1k1/2p2p1p/pbPpb2B/5p2/Q2NP3/7P/PP3PP1/4RK1R b - - 1 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1622
Best move: Qf6