Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Morphy_Defense
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. c3 a6 5. Ba4 b5 6. Bc2 Bc5 7. O-O d6 8. d4
exd4 9. cxd4 Bb6 10. Bg5 h6 11. Bh4 g5 12. Bg3 Bg4 13. e5 Nxd4 *
Position (FEN): r2qk2r/2p2p2/pb1p1n1p/1p2P1p1/3n2b1/5NB1/PPB2PPP/RN1Q1RK1 w kq - 0 14
White to move.
Themes:  Middlegame  
Puzzle rating: 1481
Best move: exf6