Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Steinitz_Defense
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. O-O Bd7 5. Re1 Nf6 6. Nc3 a6 7. Ba4 b5 8. Bb3
b4 9. Nd5 a5 10. a3 bxa3 11. bxa3 a4 12. Ba2 Be6 13. d3 g6 14. Bg5 Bg7 15. Qd2
h6 16. Be3 Nxd5 *
Position (FEN): r2qk2r/2p2pb1/2npb1pp/3np3/p3P3/P2PBN2/B1PQ1PPP/R3R1K1 w kq - 0 17
White to move.
Themes:  Middlegame  
Puzzle rating: 1234
Best move: exd5