Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Classical_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 d6 5. O-O a6 6. Ba4 Ne7 7. d4 exd4 8. cxd4
Ba7 9. Be3 O-O 10. Qd3 h6 11. Nc3 Bg4 12. Bc2 Nb4 13. Qd1 Bxf3 14. gxf3 Ng6 15.
a3 Nc6 16. Kh1 Qf6 17. Rg1 Nxd4 18. Bxd4 Bxd4 *
Position (FEN): r4rk1/1pp2pp1/p2p1qnp/8/3bP3/P1N2P2/1PB2P1P/R2Q2RK w - - 0 19
White to move.
Themes:  Middlegame  
Puzzle rating: 1520
Best move: Nd5