Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. g3 g6 3. Bg2 Bg7 4. e4 d6 5. Bd2 e5 6. d5 c6 7. Bg5 Nbd7 8. Nc3
Qc7 9. Nge2 b6 10. Qd3 cxd5 11. exd5 Bb7 12. O-O-O Ng4 13. Ne4 h6 14. f3 Ngf6
15. Bxf6 Nxf6 16. N2c3 Rc8 17. Nxf6+ Bxf6 18. Rhe1 O-O 19. Bh3 Rcd8 20. Ne4 Bg7
21. Qa3 f5 22. Nc3 a5 23. g4 fxg4 24. Bxg4 h5 25. Be6+ Kh8 26. Rf1 Ba6 27. Rf2
b5 28. Ne4 b4 29. Qa4 Rb8 30. Bd7 Rfd8 31. Bc6 Rdc8 32. Kb1 Qb6 33. Rg2 Rd8 34.
Ng5 Kg8 35. Ne6 Re8 36. Rxg6 Bb5 37. Rxg7+ Kh8 38. Bxb5 Qxb5 39. Qxb5 Rxb5 40.
Rdg1 Rxd5 41. R1g6 *
Position (FEN): 4r2k/6R1/3pN1R1/p2rp2p/1p6/5P2/PPP4P/1K6 b - - 1 41
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 797
Best move: Rd1#