Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Zukertort_Variation
Moves: 1. d4 d5 2. Nf3 Bf5 3. Bg5 f6 4. Bh4 Nc6 5. c3 e6 6. e3 a6 7. Bd3 Bg4 8. Nbd2
Bd6 9. O-O Nge7 10. Qe2 e5 11. h3 Bh5 12. g4 Bg6 13. Bxg6+ Nxg6 14. Bg3 e4 15.
Bxd6 Qxd6 16. Nh2 Nf4 *
Position (FEN): r3k2r/1pp3pp/p1nq1p2/3p4/3PpnP1/2P1P2P/PP1NQP1N/R4RK1 w kq - 2 17
White to move.
Themes:  Middlegame  
Puzzle rating: 1057
Best move: exf4