Chess puzzle (Checkmate)
Opening: Russian_Game, Russian_Game_Stafford_Gambit
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6 5. Nc3 Bc5 6. Bc4 Qd4 7. Qe2 Bg4
8. f3 Bh5 9. d3 O-O-O 10. Bd2 a5 11. a3 Rhe8 12. O-O-O b5 13. Ba2 b4 14. Na4
bxa3 15. Nxc5 *
Position (FEN): 2krr3/2p2ppp/2p2n2/p1N4b/3qP3/p2P1P2/BPPBQ1PP/2KR3R b - - 0 15
Black to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 1156
Best move: Qxb2#