Chess puzzle (Advantage)
Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Na6 7. a3 e5 8. d5 Nc5
9. Qc2 a5 10. O-O Bd7 11. Be3 b6 12. b4 Nb7 13. Rab1 Ng4 14. Bg5 f6 15. Bh4 Qe8
16. h3 Nh6 17. g4 f5 18. exf5 gxf5 19. Nh2 axb4 20. axb4 fxg4 21. hxg4 Rf4 22.
f3 Ra3 23. Bg5 Rf8 24. Nb5 Bxb5 25. cxb5 e4 26. Qxc7 *
Position (FEN): 4qrk1/1nQ3bp/1p1p3n/1P1P2B1/1P2p1P1/r4P2/4B2N/1R3RK1 b - - 0 26
Black to move.
Themes:  Middlegame  
Puzzle rating: 1670
Best move: exf3