Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Nyezhmetdinov-Rossolimo_Attack
Moves: 1. e4 c5 2. Nf3 Nc6 3. Bb5 d6 4. d4 cxd4 5. Nxd4 Bd7 6. Nxc6 Bxc6 7. Bxc6+ bxc6
8. Nc3 Nf6 9. O-O g6 10. f3 Bg7 11. Be3 O-O 12. Qd2 Re8 13. Rad1 Rb8 14. b3 a5
15. a4 Qc7 16. Bh6 Bh8 17. f4 Qb6+ 18. Kh1 Qb4 19. Rde1 *
Position (FEN): 1r2r1kb/4pp1p/2pp1npB/p7/Pq2PP2/1PN5/2PQ2PP/4RR1K b - - 4 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1721
Best move: Ng4