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. Bg5 Bg7 7. Qd2 h6 8. Bh4
Nc6 9. Nxc6 bxc6 10. O-O-O Qb6 11. Kb1 Nxe4 12. Nxe4 *
Position (FEN): r1b1k2r/p3ppb1/1qpp2pp/8/4N2B/8/PPPQ1PPP/1K1R1B1R b kq - 0 12
Black to move.
Themes: Queenside Attack Opening Mate in 1 
Puzzle rating: 529
Best move: Qxb2#