Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Steinitz_Defense
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. h3 Bd7 5. c3 a6 6. Ba4 b5 7. Bb3 Nf6 8. O-O
Nxe4 9. d4 Nf6 10. Re1 Be7 11. dxe5 dxe5 12. Nxe5 O-O 13. Bg5 Re8 14. Bxf6 Bxf6
15. Nxd7 Rxe1+ 16. Qxe1 Qxd7 17. Nd2 Re8 18. Qd1 Bg5 19. Nf3 Qe7 *
Position (FEN): 4r1k1/2p1qppp/p1n5/1p4b1/8/1BP2N1P/PP3PP1/R2Q2K1 w - - 6 20
White to move.
Themes:  Middlegame  
Puzzle rating: 1734
Best move: Nxg5