Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Bf4 e6 3. e3 d5 4. c3 c5 5. Nd2 Bd6 6. Bg3 Nc6 7. Ngf3 O-O 8. Bd3
b6 9. Qc2 Bb7 10. Bh4 Rc8 11. Bxh7+ Kh8 12. Bd3 cxd4 13. exd4 Nb4 14. Qb1 Nxd3+
15. Qxd3 Be7 16. Ng5 Ne4 17. Qh3 Nxg5 18. Bxg5+ Kg8 19. Be3 Ba6 20. Qg3 Bd3 21.
h4 Bd6 22. Qh3 Bf5 23. g4 Bh7 24. Rg1 Be7 25. g5 Bf5 26. Qg3 Bd6 27. Qg2 Bg6
28. f4 Qc7 29. Rf1 Bd3 30. Rf2 Bg6 31. Qf3 Bf5 32. h5 g6 33. Rh2 f6 34. hxg6
Bxg6 35. Qh3 Kf7 36. gxf6 Bxf4 37. Rf2 Bg3 38. O-O-O Bxf2 39. Bxf2 Rh8 40. Qg2
Rh2 41. Qg1 Qd6 42. Bg3 Rxc3+ 43. bxc3 *
Position (FEN): 8/p4k2/1p1qpPb1/3p4/3P4/2P3B1/P2N3r/2KR2Q1 b - - 0 43
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 765
Best move: Qa3#