Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Dragon_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2
Nc6 9. O-O-O d5 10. exd5 Nxd5 11. Nxd5 Qxd5 12. Nxc6 Qxc6 13. Bd3 Be6 14. Be4
Qb5 15. b3 Rfc8 16. Bd5 Qa6 17. Bxe6 Qa3+ 18. Kb1 *
Position (FEN): r1r3k1/pp2ppbp/4B1p1/8/8/qP2BP2/P1PQ2PP/1K1R3R b - - 2 18
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 824
Best move: Qb2#