Chess puzzle (Advantage)
Opening: Semi-Slav_Defense, Semi-Slav_Defense_Other_variations
Moves: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 Nf6 5. Bf4 Bb4 6. e3 Ne4 7. Qb3 a5 8. Bd3
O-O 9. O-O Bxc3 10. bxc3 c5 11. Bxe4 dxe4 12. Nd2 cxd4 13. cxd4 f5 14. f3 exf3
15. Rxf3 Nc6 16. Rg3 Kh8 17. d5 e5 18. dxc6 *
Position (FEN): r1bq1r1k/1p4pp/2P5/p3pp2/2P2B2/1Q2P1R1/P2N2PP/R5K1 b - - 0 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1581
Best move: exf4