Chess puzzle (Advantage)
Moves: 1. e4 e6 2. Nf3 d5 3. e5 c5 4. d4 Nc6 5. Bb5 Bd7 6. Ba4 Nxd4 7. Bxd7+ Qxd7 8.
Nxd4 cxd4 9. Qxd4 Rc8 10. c3 Bc5 11. Qg4 g6 12. O-O h5 13. Qh4 Nh6 14. Qf6 Rh7
15. Bxh6 Rxh6 16. Nd2 Be7 17. Qg7 Bf8 18. Qg8 Qc7 19. Nf3 h4 20. Rfe1 g5 21.
Nxg5 *
Position (FEN): 2r1kbQ1/ppq2p2/4p2r/3pP1N1/7p/2P5/PP3PPP/R3R1K1 b - - 0 21
Black to move.
Themes:  Middlegame  
Puzzle rating: 1174
Best move: Rg6