Rowing (Whisper Sum Sudoku)
(Published on 16. May 2022, 09:00 by Agent)
After solving Qodec's recent puzzle which included Chinese whispers (or "telephone lines", as it was suggested that another name should be adopted for this variant), I was inspired to explore this constraint some more. At the same time, I remembered puzzles from Tallcat, Kilonum, and AnalyticalNinja on the CTC Discord, which combined renban lines with an equal region sum constraint. I decided to experiment with dual-purpose whispers / equal sum lines, and here is the result :)
Rules:
- Normal sudoku rules apply.
- Adjacent digits along a lilac line must have a difference of 2 or less.
- Adjacent digits along a green line must have a difference of 5 or more.
- Digits on each line (both colours) have an equal sum N within each box it passes through.
Enjoy the puzzle!
Solution code: Row 5 (left to right) then column 8 (top to bottom)
Comments
on 13. June 2023, 14:54 by codewizard
That was really cool. I'm generally not fond of the sudoku part, but here I found it quite enjoyable and it flowed nicely. Great work Agent!
on 13. January 2023, 16:55 by StephenR
Thanks, interesting combination of rules. Satisfying to whittle down the possibilities for the lines.
on 21. May 2022, 22:46 by sacklunch
Very interesting constraints and interaction. Good level of challenge for me, thanks!
-- Thank you! I'm glad you enjoyed the interactions between the constraints.
on 17. May 2022, 21:43 by wenchang
Nice puzzle. https://youtu.be/kNEr5Cz2SR8
-- Thank you for the kind comment and for the feature on your channel!
on 16. May 2022, 18:34 by davidjshort
This is my first exposure to a <2 constraint. It was a pleasant variation. thanks
-- Thanks, I'm glad you enjoyed the new rule set :)
