Chess puzzle (Checkmate)
Moves: 1. d4 e5 2. dxe5 d6 3. exd6 Bxd6 4. Nc3 Nc6 5. Nf3 Bg4 6. h3 Bxf3 7. gxf3 Nf6
8. Bg5 h6 9. Bh4 Qe7 10. Qd2 O-O-O 11. Qe3 Qd7 12. Bxf6 gxf6 13. O-O-O Qf5 14.
Kb1 Nb4 15. Qe4 Qa5 16. Qc4 a6 17. Nd5 Nxd5 18. Qxd5 Qb4 19. Qb3 Qa5 20. Bg2 c6
21. Qxf7 Be5 22. f4 Bxf4 23. Qxf6 Be5 24. Qe6+ Kb8 25. Qb3 Qc5 26. e3 a5 27.
Qa3 Qb5 28. Qe7 Bc7 29. Rxd8+ Rxd8 30. Qa3 Bd6 31. Qb3 Qc5 32. Rd1 Ka8 33. a3
Qg5 34. Qe6 Bc7 35. Rxd8+ Qxd8 36. Qg4 Be5 37. Qh5 Bg7 38. b3 Qf6 39. Qe2 *
Position (FEN): k7/1p4b1/2p2q1p/p7/8/PP2P2P/2P1QPB1/1K6 b - - 2 39
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 520
Best move: Qb2#