Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Be3 d6 6. f3 e5 7. d5 a5 8. Qd2 Na6
9. g4 c6 10. O-O-O cxd5 11. cxd5 b5 12. Bxb5 Bd7 13. a4 Nc5 14. Bxc5 dxc5 15.
Nge2 Bxb5 16. Nxb5 c4 17. Nec3 h5 18. h3 Qb6 19. Kb1 Kh7 20. d6 Rfd8 21. g5 Nd7
22. Qd5 Kg8 23. Qxc4 Rab8 24. Nd5 Qf2 25. Ne7+ Kf8 26. Nc6 Rdc8 27. Nxb8 Rxc4
28. Nxd7+ Kg8 29. Rhf1 Qe3 30. Rfe1 Qb3 31. Rc1 Rxa4 32. Nc3 Rb4 33. Re2 Rd4
34. Nc5 Qc4 35. Nd5 Qxe2 36. d7 Rxd5 37. exd5 e4 38. d8=Q+ Kh7 39. Qb6 exf3 40.
Qa6 *
Position (FEN): 8/5pbk/Q5p1/p1NP2Pp/8/5p1P/1P2q3/1KR5 b - - 1 40
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 892
Best move: Qxb2#