A Flock of Pixels (Colourful Killers)
(Published on 27. August 2023, 15:56 by The Book Wyrm)
This puzzle was created for a challenge on the CtC discord server, where I had a Duel with @MosssLeee to create a puzzle that makes pixels art.
Since making this puzzle, I have made an easier puzzle with the same ruleset, since this one is very tough. If you want to try that one first, it can be found here.
Rules:
- Normal sudoku rules apply: Place the digits 1-9 once each in every row, column, and region.
- Digits in a cage do not repeat.
- Colour each cage according to the last digit of the sum, using the key provided. Note: the colours used are slightly different in the penpa and Sudokupad versions.
- Numbers in the top left corner of a cage give the sum of orthogonally adjacent cages of a different colour.
Sudokupad link: Click Here
Penpa+ link: Click Here
Solution code: Column 9
Comments
on 13. January 2025, 21:27 by the_cogito
It's more arithmetically intensive than I feared, but a lovely construction :)
on 28. July 2024, 17:11 by sanabas
Pencil-marking was a bit of a challenge, trying to keep track of potential cage sums.
As others have said, got a lot easier after the break-in, and was excellent.
on 27. July 2024, 09:50 by wullemuus
Not as hard as I thought it would be once I found the break-in. So well chosen cages! Really beautiful!
on 12. March 2024, 03:19 by Kafkapharnaum
Finally had a big chunk of time tonight, and told myself, alright, this is now or never… and I did it, getting it rated at once, hurray! I just have to echo polar’s comment here. Granted, I did have an immensely hard time just to even start – it felt like trying to catch an oily fish while in free fall, or during a mud fight or what have you, and I after finally managed to get something going, I thought it’d be a similarly intense fight for every inch of grid/cage, but no, not at all, it’s absolutely amazing how things just literally kick into gear, and how big chunks can be uncovered (or colored, rather) at a time “fairly” quickly. Just incredible setting from start to finish, hats off!
on 8. February 2024, 19:31 by The Book Wyrm
Added link to easier puzzle, and updated title.
on 2. November 2023, 20:27 by Kitty Trouble
Probably the hardest sudoku I've ever completed, very nice to finish though! Was really hard to wrap my head around how to progress, though I got there in the end.
on 26. September 2023, 10:51 by zzw
Very nice! And quite tough too. A pretty good picture too, given the constraints!
on 30. August 2023, 18:34 by polar
An awesome twist on killer sudoku! Surprisingly smooth given its complexity and definitely not as arithmetically intensive as I feared at first glance. Thank you :)
on 29. August 2023, 22:06 by filuta
I absolutely loved this, both the concept and the implementation, very hard though.
