Chess puzzle (Advantage)
Opening: Kings_Gambit_Declined, Kings_Gambit_Declined_Queens_Knight_Defense
Moves: 1. e4 e5 2. f4 Nc6 3. Bc4 Nf6 4. Nc3 Bc5 5. Nf3 exf4 6. d4 Bb4 7. O-O O-O 8. e5
Bxc3 9. bxc3 d5 10. Bd3 Nh5 11. Qe1 Be6 12. Nh4 a6 13. Nf5 Qg5 14. Bxf4 *
Position (FEN): r4rk1/1pp2ppp/p1n1b3/3pPNqn/3P1B2/2PB4/P1P3PP/R3QRK1 b - - 0 14
Black to move.
Themes:  Middlegame  
Puzzle rating: 1159
Best move: Nxf4