Chess puzzle (Advantage)
Moves: 1. Nf3 c6 2. d4 e6 3. c4 d5 4. Nc3 dxc4 5. e4 Nf6 6. e5 Nd5 7. Bxc4 b5 8. Bb3
a5 9. a3 a4 10. Ba2 Ba6 11. Nxd5 cxd5 12. O-O b4 13. Re1 b3 14. Bb1 Nc6 15. Bd3
Bxd3 16. Qxd3 Rb8 17. Bd2 Ne7 18. Rac1 Nf5 19. Rc3 Be7 20. Rec1 O-O 21. Rc7 h6
22. Ra7 Ra8 23. Rcc7 Rxa7 24. Rxa7 f6 25. g4 fxe5 26. gxf5 e4 27. Qc3 *
Position (FEN): 3q1rk1/R3b1p1/4p2p/3p1P2/p2Pp3/PpQ2N2/1P1B1P1P/6K1 b - - 1 27
Black to move.
Themes:  Middlegame  
Puzzle rating: 1547
Best move: exf3