Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Accelerated_Dragon
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 a6 7. Be2 e6 8. O-O
Nge7 9. a3 O-O 10. f4 f5 11. e5 d6 12. Nxc6 Nxc6 13. Qxd6 Qe8 14. Bb6 Rf7 15.
Rad1 Rd7 16. Qc5 Bf8 17. Qc4 Rxd1 18. Rxd1 Bd7 19. Bc5 *
Position (FEN): r3qbk1/1p1b3p/p1n1p1p1/2B1Pp2/2Q2P2/P1N5/1PP1B1PP/3R2K1 b - - 2 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1677
Best move: b5