Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Modern_Variations
Moves: 1. e4 c5 2. Nf3 d6 3. Bc4 e6 4. O-O a6 5. d4 b5 6. Be2 cxd4 7. Nxd4 Bb7 8. Bf3
Nc6 9. c3 Nf6 10. Bg5 Be7 11. Re1 O-O 12. Nd2 h6 13. Bh4 Nxd4 14. cxd4 Re8 15.
Nf1 Qb6 16. Rc1 Rac8 17. e5 Rxc1 18. Qxc1 Bxf3 *
Position (FEN): 4r1k1/4bpp1/pq1ppn1p/1p2P3/3P3B/5b2/PP3PPP/2Q1RNK1 w - - 0 19
White to move.
Themes:  Middlegame  
Puzzle rating: 1120
Best move: exf6