Friday 13 December 2013

Friday Puzzles #238

In case you didn't see, I posted an easy masyu for last week's puzzle.  This week, something much harder.  As always with this variant, numbers placed in cells related by a chess knight's move must be different.  Enjoy!
    275 Anti-Knight Sudoku – rated hard
All puzzles © Tom Collyer 2009-13.


  1. Forgot to take in count the time for this one.Probably more than 1 hour.besides i write very badely when it comes to a non online game.
    Thanks for the solve and congratulations for the picture.It correspond "much more" with my philosophy than any other perspective picture.

  2. Thannk you, Laurent!

    The pattern is very interesting for anti-knight I think. It's possible to make it even harder, and also a little easier as well. I like to have a challenging puzzle every now and again to remind everyone that not all my puzzles are easy ;)

  3. Good morning Tom. Not a comment about your puzzle I'm afraid. In New Zealand we are having our first Sudoku championship March 1-2, 2014 and I was wondering if we could ask you for some advice? Our format is unusual (and possibly hopeless - but if we know real soon we can change it) Our website is and email Sorry to intrude

    1. Hi Bob, I'll send you an e-mail shortly. I'll also see if I can get a contact page working too!


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