Chess puzzle (Advantage)
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2
Nc6 9. Bc4 Bd7 10. h4 Ne5 11. Bb3 Qa5 12. O-O-O Rfc8 13. Kb1 Nc4 14. Bxc4 Rxc4
15. Nb3 Qc7 16. h5 Nxh5 17. Bd4 Bxd4 18. Nxd4 Nf6 19. g4 Rc8 20. g5 Rxc3 *
Position (FEN): 2r3k1/ppqbpp1p/3p1np1/6P1/3NP3/2r2P2/PPPQ4/1K1R3R w - - 0 21
White to move.
Themes:  Middlegame  
Puzzle rating: 1952
Best move: gxf6