Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Kan_Variation
Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. a4 Qc7 6. Nc3 Nf6 7. Be2 Bb4 8. O-O
Be7 9. Kh1 d6 10. f4 Nbd7 11. f5 e5 12. Nb3 b6 13. Qe1 Bb7 14. Bd3 Nc5 15. Nxc5
dxc5 16. Qg3 c4 17. Qxg7 *
Position (FEN): r3k2r/1bq1bpQp/pp3n2/4pP2/P1p1P3/2NB4/1PP3PP/R1B2R1K b kq - 0 17
Black to move.
Themes:  Middlegame  
Puzzle rating: 1240
Best move: Rg8