Chaos All Over
(Published on 12. April 2025, 11:49 by wuc)
After solving a couple of choas construction puzzle lately, I tried to set another one on my own. I tried to have constant interaction of multiple constraint across the puzzle.Therefore the name. Remember that chaos construction is the final boss constraint. I find it hard to set a difficulty, maybe an easier 4*?
Sorry for the lengthy ruleset. Have fun and leave a comment.
Rules:
Place the numbers from 1 to 9 exactly once in every row, column, and region. Each region is orthogonally connected and must be located by the solver.
A number placed in a cell with an arrow indicates how many regions are seen in this direction that are different to the one of the cell with the arrow. Multiple arrows in a single cell count separately (in each direction the given number of regions).
Digits in cells with a circle indicate the number of cells seen by horizontally and vertically that belong to the same region as the cell with the circle, including the cell with the circle. Region borders obstruct vision.
Region Sum Lines: Region borders divide each blue line into segments of the same sum of values.
Palindromes: Digits along a gray palindrome line read the same forwards as backwards along the line.
Enable the "Draw Arrows Above Lines" Option to see all arrows clearly
play on sudokupad
Solution code: Row 7 with "-" for region borders (e.g. 213-49-8-67-5)
Comments
on 18. April 2025, 19:17 by askaksaksask
Great idea for a CC puzzle, and very accessible! I found the solve itself to be fairly smooth, with most of the difficulty in the initial few steps, when still getting oriented to the line geometry/ interactions. The endgame was pure CC, which i love. Fun puzzle all around. Thank you!
on 15. April 2025, 19:37 by Voidslime
Rarely is a puzzle this difficult also this smooth throughout! Very fun solve
on 15. April 2025, 15:12 by MagnusJosefsson
Fantastic! Very fun and smooth, with a lot of nice region building. Easy finish.
on 14. April 2025, 07:57 by henrypijames
"Region borders divide each blue line …" cannot be interpreted literally as "each blue line **must** be divided by region borders". Because if that were the case, given it says "borders" in plural, there must be at least two borders dividing each line into at least three regions.
on 14. April 2025, 06:06 by gdc
Very nice puzzle!
If the RSL rule is intended like in the discussion below, I would suggest the following wording. Would have reduced my solve time considerably.
Region Sum Lines: Region borders divide each blue line into two or more segments with the same sum.
on 13. April 2025, 20:55 by Franktothejay
Thanks to killer rectangle for asking that question. I, too, was unsure if a blue line could be in a single region. I'm not sure if this is standard wording for region sum lines, but it isn't completely clear from reading it that they have to be divided.
on 13. April 2025, 03:03 by killer_rectangle
Is it legal for a region sum line to be entirely contained within one region?
*** No. Box borders divide each line.
on 12. April 2025, 21:40 by marcmees
very nice. thanks.
on 12. April 2025, 17:39 by Franjo
Whenever I notice there’s a new CC-puzzle out there I cannot resist to give it a try. And I had a wonderful hour solving this one. Thank you very much for creating and sharing.
on 12. April 2025, 17:00 by oskode
Hard but fair all around, really nice!
on 12. April 2025, 13:36 by Snookerfan
Superb puzzle! Thank you for pointing out how to see the arrows properly in sudokopad, although I already finished the puzzle before reading that. The midsolve was incredibly hard for me, then suddenly everything collapsed beautifully. Thank you
on 12. April 2025, 12:15 by Rafje
The version on sudokupad differs from the version here in R4C4 and R1C5; which is correct?
Also, on sudokupad the arrows are obscured by blue lines and are very hard to see.
** Thanks for pointing out the two issues. No arrows in R1C5 and R4C4. The versions should be the same now.
To see the arrows properly enable the "Draw Arrows Above Lines" in sudokupad.
Sorry for causing trouble instead of having fun solving :-)
