Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. a4
O-O 9. Be2 Re8 10. Nd2 b6 11. O-O Ba6 12. Bb5 Bxb5 13. axb5 a5 14. Re1 Nbd7 15.
Nc4 Ne5 16. Na3 h6 17. h3 g5 18. h4 g4 19. Bf4 Qc7 20. Qd2 Kh7 21. Rad1 Re7 22.
Qc2 Rae8 23. Ne2 Kh8 24. Ng3 Ng6 25. Bc1 Re5 26. Nc4 R5e7 27. h5 Ne5 28. Ne3
Rg8 29. Nef5 Ree8 30. Nxg7 Kxg7 31. Nf5+ Kh7 32. Bxh6 Nxh5 33. Qc1 Rg6 34. Bf4
Qd8 35. Bd2 Nf3+ 36. gxf3 gxf3+ 37. Kf1 Reg8 38. Ng3 Qh4 39. Re3 Qh1+ 40. Nxh1
*
Position (FEN): 6r1/5p1k/1p1p2r1/pPpP3n/4P3/4Rp2/1P1B1P2/2QR1K1N b - - 0 40
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1057
Best move: Rg1#