Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Zukertort_Variation
Moves: 1. d4 d5 2. Nf3 c6 3. e3 Bg4 4. Bd3 e6 5. Nbd2 c5 6. c3 Nf6 7. e4 cxd4 8. Qa4+
Nc6 9. exd5 Qxd5 10. cxd4 Bd6 11. Bc4 Qh5 12. O-O O-O 13. Re1 Nxd4 14. h3 Bxf3
15. Nxf3 Nxf3+ 16. gxf3 Qxf3 17. Re3 Qf4 18. Rg3 Nh5 *
Position (FEN): r4rk1/pp3ppp/3bp3/7n/Q1B2q2/6RP/PP3P2/R1B3K1 w - - 4 19
White to move.
Themes:  Middlegame  
Puzzle rating: 910
Best move: Bxf4