Chess puzzle (Checkmate)
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 Nf6 7. f3 O-O 8.
Qd2 d5 9. Nxc6 bxc6 10. O-O-O e6 11. g4 a5 12. g5 Nd7 13. h4 a4 14. h5 a3 15.
b3 Qa5 16. Nb1 *
Position (FEN): r1b2rk1/3n1pbp/2p1p1p1/q2p2PP/4P3/pP2BP2/P1PQ4/1NKR1B1R b - - 2 16
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1118
Best move: Bb2#