Perhaps you’ve already noticed the cover of my new Killer Sudoku book. In case you haven’t, here is a proper presentation of this new and fiendish sudoku book. So… many of you have asked for a book with only the most difficult of my Killer Sudokus. In “Revenge of Killer Sudoku 6” I dropped the [...]
I’ve published many Killer Sudoku books and I kinda have a reputation for creating only difficult killer sudokus. Well, I decided to change that and therefore I prepared and published a book with only really EASY Killer Sudoku puzzles. If you’ve been scared to try the Addoku or Sumdoku (as these puzzles are also known), [...]
Merry Christmas to all who celebrate this day! As a small gift for you, I’ve prepared an odd-even sudoku variation puzzle. It’s not the first odd even puzzle I ever posted, but it is the first plain odd even sudoku. And to spice things up a little bit, this is a very difficult odd/even sudoku! [...]
Today we have an extra special puzzle – a Killer Sudoku puzzle by a guest author. It’s been a while since I last posted such a puzzle. I really appreciate the enthusiasm of the visitors to my site and your efforts to make good quality puzzles and share them with others. Today’s puzzle was created [...]
A short answer to that question would be: because I enjoy doing it! … but here is a long version, too. Back in the summer of 2005 I realized that it’s about time I had my own website. At that point I had been computer programming for years and it kinda made sense that I [...]
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