Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Modern_Variations
Moves: 1. e4 c5 2. Nf3 d6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 g6 6. Bb5 Bd7 7. Be3 a6 8.
Nxc6 bxc6 9. Bc4 c5 10. O-O Bg7 11. Rb1 Nf6 12. Qd2 h6 13. Rfe1 Rb8 14. b3 Bc6
15. Bf4 Nh5 16. Bg3 Nxg3 17. hxg3 O-O 18. a4 Kh7 19. Bxa6 *
Position (FEN): 1r1q1r2/4ppbk/B1bp2pp/2p5/P3P3/1PN3P1/2PQ1PP1/1R2R1K1 b - - 0 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1575
Best move: Qa5