Chess puzzle (Checkmate)
Moves: 1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. Nge2 O-O 6. f3 c5 7. Be3 cxd4 8. Nxd4
Nc6 9. Nc2 Bd7 10. Qd2 Re8 11. b3 Rc8 12. Rc1 a6 13. Be2 Ne5 14. O-O h5 15.
Rfd1 Qc7 16. a4 b5 17. axb5 axb5 18. Nxb5 Bxb5 19. cxb5 Qc3 20. Nd4 Qxd2 21.
Bxd2 Nfd7 22. Nc6 Nxc6 23. bxc6 Bd4+ 24. Kf1 Ne5 25. f4 Ng4 26. Bxg4 hxg4 27.
Rc4 Bb6 28. Ra1 e6 29. Ra6 d5 30. Rc2 Bd4 31. e5 f6 32. exf6 Bxf6 33. b4 e5 34.
fxe5 Bxe5 35. g3 Rf8+ 36. Kg2 Bd4 37. Bf4 g5 38. Bxg5 Rce8 39. Bf4 Re1 40. c7 *
Position (FEN): 5rk1/2P5/R7/3p4/1P1b1Bp1/6P1/2R3KP/4r3 b - - 0 40
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 977
Best move: Rg1#