Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Bird_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. Qf3 Nf6 6. c3 dxc3 7. bxc3 Be7
8. d4 O-O 9. O-O a6 10. Bc4 b5 11. Bb3 d6 12. Be3 c6 13. e5 dxe5 14. dxe5 Nd7
15. e6 Ne5 16. exf7+ Kh8 17. Qh5 Qd6 18. Nd2 *
Position (FEN): r1b2r1k/4bPpp/p1pq4/1p2n2Q/8/1BP1B3/P2N1PPP/R4RK1 b - - 4 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1508
Best move: Bg4