Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Morphy_Defense
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. c3 a6 5. Ba4 b5 6. Bc2 Be7 7. O-O Nf6 8. d3
O-O 9. Bg5 h6 10. Bh4 Bg4 11. Nbd2 Ne8 12. Bxe7 Nxe7 13. Re1 f5 14. exf5 Nxf5
15. Nf1 Nh4 16. N1d2 d5 17. Rxe5 Qf6 18. d4 Nd6 19. Qe2 *
Position (FEN): r4rk1/2p3p1/p2n1q1p/1p1pR3/3P2bn/2P2N2/PPBNQPPP/R5K1 b - - 2 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 2147
Best move: Nc4