Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 c6 3. e3 Nf6 4. Nc3 e6 5. Bd3 Bb4 6. Bd2 Bxc3 7. Bxc3 O-O 8. Nf3
c5 9. O-O cxd4 10. Nxd4 Nbd7 11. cxd5 Nxd5 12. Rc1 N7f6 13. e4 Nxc3 14. bxc3
Bd7 15. e5 Nd5 16. Be4 Bc6 17. Qf3 Ne7 18. Bxc6 Nxc6 19. Nxc6 bxc6 20. Qxc6 Rc8
21. Qa4 Qb6 22. Qb4 Qc7 23. Qa3 Qc4 24. Qb3 Qc5 25. a3 Qxe5 26. c4 Qc5 27. a4
Rb8 28. Qd3 Rfd8 29. Qe2 h6 30. Rb1 Qf5 31. Rxb8 Rxb8 32. Qe3 Rb1 33. Qxa7
Rxf1+ 34. Kxf1 Qd3+ 35. Kg1 *
Position (FEN): 6k1/Q4pp1/4p2p/8/P1P5/3q4/5PPP/6K1 b - - 2 35
Black to move.
Themes:  Endgame, Queen Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 619
Best move: Qb1#