The October 22 Daily Sudoku Nightmare appears to be a duplicate of
the February 3 Nightmare.
October 22 Nightmare Duplicate
Thanks for spotting this error. I'm glad that there are others who are keeping track of my Nightmares. 
Because I had no access to my Sudoku database due to a computer crash, I could not check the previous entries. In this brief period, 2 duplicates slipped through on the 20th and 22nd October.
I have replaced both puzzles with new originals. You can find them in the archive.
Ruud
Because I had no access to my Sudoku database due to a computer crash, I could not check the previous entries. In this brief period, 2 duplicates slipped through on the 20th and 22nd October.
I have replaced both puzzles with new originals. You can find them in the archive.
Ruud
“If the human brain were so simple that we could understand it, we would be so simple that we couldn't.” - Emerson M Pugh