Chess puzzle (Advantage)
Opening: Scotch_Game, Scotch_Game_Classical_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nxc6 Qf6 6. Qe2 Qxc6 7. Nc3 Ne7
8. Be3 O-O 9. Bxc5 Qxc5 10. O-O-O d6 11. f4 a6 12. h3 b5 13. g4 Bb7 14. Bg2 Ng6
15. Qf1 Qe3+ 16. Kb1 Qxf4 17. Qd3 Ne5 18. Qd4 Nf3 *
Position (FEN): r4rk1/1bp2ppp/p2p4/1p6/3QPqP1/2N2n1P/PPP3B1/1K1R3R w - - 4 19
White to move.
Themes:  Middlegame  
Puzzle rating: 2072
Best move: Qf2