Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Hyperaccelerated_Fianchetto
Moves: 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. Nc3 Nc6 6. Be3 Nf6 7. f3 O-O 8.
Qd2 Qa5 9. O-O-O Qb4 10. Kb1 a5 11. Nxc6 bxc6 12. Nd5 Nxd5 13. exd5 *
Position (FEN): r1b2rk1/3pppbp/2p3p1/p2P4/1q6/4BP2/PPPQ2PP/1K1R1B1R b - - 0 13
Black to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 700
Best move: Qxb2#