Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Steinitz_Defense
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d3 Bd7 5. O-O Nf6 6. Bg5 h6 7. Bh4 Be7 8. Nc3
a6 9. Ba4 b5 10. Bb3 Na5 11. Re1 Nxb3 12. axb3 O-O 13. Nd5 *
Position (FEN): r2q1rk1/2pbbpp1/p2p1n1p/1p1Np3/4P2B/1P1P1N2/1PP2PPP/R2QR1K1 b - - 2 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 948
Best move: Nxd5