Kurotto Killer Sudoku
(Published on 29. July 2022, 04:21 by KNT)
Some cells in the grid must be shaded. A number in a colored cell indicates the total count of shaded cells in orthogonally connected groups sharing an edge with that cell. Colored cells are not shaded.
No number may repeat in any orthgonally connected group of shaded or unshaded cells, and a cell with a number in its top left corner indicates the sum of the numbers in its orthogonally connected group. A group may contain any number of clues, possibly zero.
A 1-6 example with a given number is provided:
Solution code: Row 9 followed by Column 9
Comments
on 19. November 2023, 21:26 by StephenR
High 5 for me (in both senses)! I found this brutal, but I perservered for the intricate and clever logic.
on 27. February 2023, 11:27 by Piatato
So much fascinating logic. Thanks!
on 10. November 2022, 17:07 by kjholt
This might just be the most beautiful puzzle. No caveats. This could be the gold standard. Every puzzle enthusiast should attempt this puzzle at some point.
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@kjholt I'm honored, however I think this means there are still so many awesome puzzles from many different authors you have yet to do! :)
on 18. September 2022, 09:00 by Phistomefel
There is so much wonderful, tightly packed logic in this puzzle. It is amazing. Thank you for setting this beauty, KNT!
on 6. August 2022, 04:48 by Agent
There is a lot of original logic packed into this puzzle. I loved it.
on 3. August 2022, 21:05 by lerroyy
Great puzzle with a very enjoyable solve. thanks!
on 1. August 2022, 21:46 by marcmees
Again a very nice and challenging puzzle with surprising twists. Thanks
on 1. August 2022, 21:26 by wenchang
https://youtu.be/UHWfgIPfK7o
@KNT love your puzzle. It is very hard while enjoyed.
on 1. August 2022, 18:57 by Jesper
Great puzzle! A lot of elegant deductions, really enjoyed it!
on 1. August 2022, 03:41 by cdwg2000
Very nice!
on 31. July 2022, 00:09 by Niverio
One of my favorite puzzles of yours!
on 30. July 2022, 21:29 by grkles
Very hard but very nice!
on 30. July 2022, 10:38 by twobear
Great puzzle! Remains challenging until the very end. Thank you!
on 29. July 2022, 18:15 by Christounet
Phew ! That one was quite challenging all the way through ! I was worried I might have broken it in the end because it seemed I had a shading disambiguation problem. And then the revelation came, and it was a perfect ending ! Thanks +++ again !!
on 29. July 2022, 10:31 by RJBlarmo
Great hybrid, full of aha moments throughout the whole solve.
on 29. July 2022, 07:17 by Vebby
Wonderful logic! Particularly enjoyed the opening and ending phases. Thanks KNT :)
on 29. July 2022, 04:23 by TotallyNormalCat
Amazing puzzle, there's just so much logic packed into it. One of my favorites from you :)
