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. d3 Nf6 6. Bc4 Be7 7. Nc3 O-O 8. Bg5
h6 9. Bh4 Bg4 10. h3 Bxf3 11. Qxf3 g5 12. Bg3 h5 13. h4 Nd4 14. Qd1 Ng4 15. Nd5
gxh4 16. Bh2 Bg5 17. Ne3 Bxe3 18. fxe3 Qg5 *
Position (FEN): r4rk1/ppp2p2/3p4/4p1qp/2BnP1np/3PP3/PPP3PB/R2Q1RK1 w - - 1 19
White to move.
Themes:  Middlegame  
Puzzle rating: 1651
Best move: exd4