Chess puzzle (Checkmate)
Opening: Semi-Slav_Defense, Semi-Slav_Defense_Other_variations
Moves: 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. Bf4 Qb6 6. Qc2 c5 7. cxd5 cxd4 8.
Qa4+ Bd7 9. Qxd4 Qxb2 10. Rb1 Qc2 11. Rxb7 Ne4 12. Nxe4 exd5 13. Qxd5 Ba3 14.
Rxd7 Nxd7 15. Qxa8+ Ke7 16. Qd5 Bb4+ 17. Nc3 Bxc3+ 18. Nd2 *
Position (FEN): 7r/p2nkppp/8/3Q4/5B2/2b5/P1qNPPPP/4KB1R b K - 1 18
Black to move.
Themes: Pin Middlegame Mate in 1 
Puzzle rating: 1298
Best move: Qb1#