Boxes of Paint (Colourful Killers)
(Published on 23. November 2023, 23:18 by The Book Wyrm)
For a more approachable puzzle with this ruleset, try Sketch,
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 (i.e. cages that sum i.e. cages that sum to values with the same last digit are the same colour, and cages that sum to values with a different last digit are different colours).
- 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: Row 8
Comments
on 6. May 2025, 23:24 by Fool on Hill
Beautifully creative puzzle: deserves more solves. At the start it feels impossible, but gradually it unfolds with clean logic. It rewarded careful and precise thought with hopeful progress (and twice punished careless and imprecise thought). Enjoyed the challenge.
on 20. August 2024, 10:49 by wullemuus
Beautiful genre with some tricky pitfalls. Working through needs a lot of attention and endurance. But it's worhtwhile every second!
on 29. November 2023, 15:32 by hepcecob
This was insane. I spent more hours on this puzzle than any other puzzle in recent memory. I actually found the break in to be easier than the rest of the puzzle. Absolute insanity all the way through, bravo.
