Anti-Knight Killer Sudoku
(Published on 26. July 2020, 04:56 by Willy Wonka)
This puzzle is a partial killer Sudoku with an anti-knight move restriction. To be expected from a killer variant, a bit of number crunching is required to start the solve, which then transitions into some fun (and tricky) knight's move logic.
Rules:
Normal sudoku rules apply. Every row, column and box must contain the digits from 1-9.
Normal killer sudoku rules apply. Within each cage, digits cannot repeat and must sum to the given total in the top-left corner.
Normal anti-knight sudoku rules apply. Cells that are a chess knight's move apart cannot contain the same digit.
As always, your comments and ratings are greatly appreciated! Enjoy the puzzle :)
Solution code: Rows 1 and 3
Comments
on 28. April 2024, 04:07 by Willy Wonka
Updated online solving links
on 4. June 2022, 13:57 by Frans Wentholt
What a wonderful puzzle!
on 20. September 2020, 02:13 by Djmelee3000
Great puzzle! I completely missed a knight move at the bottom right and was staring for 15 minutes unsure how to finish the puzzle lol
@Djmelee3000 glad you enjoyed it! There is a few tricky knight moves to spot that's for sure :)
on 27. July 2020, 06:29 by Nylimb
Very elegant!
on 27. July 2020, 03:45 by henrypijames
This one set a personal record of how many times I broke the puzzle and had to go back - it was more than 10 times, including 4 complete restarts because I realized I had made some fundamental wrong assumptions.
@henrypijames at least it was still achievable for you! I hope you had fun nonetheless
on 26. July 2020, 16:35 by marcmees
a lot of solving fun indeed
on 26. July 2020, 09:33 by Phistomefel
Very nice one!
@Phistomefel glad you enjoyed it :)
on 26. July 2020, 08:44 by Richard
It's always amazing how such a large part of the grid can be left completely without clues because of the anti-knight constraint.
If you are interested, I did something similar with the Non Consecutive constraint earlier. You can find that one here:
https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=0002BE
@Richard it makes the grids look very nice and, in my opinion, is quite difficult to set! I will give that puzzle a whirl it looks very appealing, could be the 100th solver unless someone beats me to it..
