Rock and a Hard Place (Chaos Construction)
(Published on 15. March 2023, 09:00 by tallcat)
As a note, I found this hard to gauge on the difficulty front and ultimately listed this as 4/5 but i consider this to be in comparison to other CC puzzles, rather than compared to a 4/5 variant sudoku. Please keep that in mind!
Chaos Construction: Place the digits 1 to 9 once each in every row, column, and region. Regions are orthogonally connected and must be located by the solver.
Between Lines: Digits on lines between filled circles must have values strictly between those in circles. Digits may repeat on lines if allowed by other rules. Circle digits also give the number of orthogonally visible cells (including itself) in its region i.e. a 9 circle will see all the cells in its region. Note, region borders obstruct vision.
Can be solved online at f-puzzles or CTC
Solution code: Row 7 (left to right) and column 6 (top to bottom). 18 digits, no spaces.
Comments
on 6. June 2023, 23:01 by Christounet
Excellent puzzle ! As stated by others, the late midsolve gave me to think about a lot and change perspective as clues were running out pretty quickly. Thanks :)
on 22. April 2023, 01:09 by dennischen
Started out pretty approachable, but goodness it got real hard real fast :) Thanks for the puzzle!
on 19. March 2023, 14:56 by SHERAX
Amazing!
on 19. March 2023, 04:56 by wenchang
https://youtu.be/IqkN66n3Ufw
Very Nice and enjoyable. Spoiler alert!
on 18. March 2023, 17:10 by BHUNTER47
This puzzle ended up being one of the more satisfying solves when I realized that things were unwinding and I actually did it correctly. There were a number of very tricky mid-solve logic steps to work through, and while it took me almost 4 hours to solve, I am extremely thrilled to have completed it at all.
on 16. March 2023, 22:07 by Elliptical
What an incredibly tough puzzle. I loved it :) Thank you.
on 16. March 2023, 16:25 by kjholt
Do region borders obstruct vision? It's not explicitly stated either way.
REPLY: They do. I have amended rules to reflect this.
on 16. March 2023, 14:32 by peacherwu2
I think mid-solve is interesting too.
on 16. March 2023, 05:22 by wisty
The first time I solved this, it flowed super smoothly. I solved it a second time to help a friend and strangely enough I had more trouble with it the second time around! Really great puzzle regardless, congrats on setting a CC :)
on 15. March 2023, 23:10 by madhupt
Brilliant puzzle, as usual, from @tallcat! Start was smooth but became very hard in the middle. Really glad that I managed to solve it. Such tight lines, most of them. Thanks for sharing.
on 15. March 2023, 16:27 by halakani
I think the difficulty should be 5 stars because of the later stages. Great puzzle.
on 15. March 2023, 15:44 by Playmaker6174
Fantastic (yet very tricky) puzzle! I actually enjoyed how the opening sequence went out, but the mid solve and the parts toward the end took me longer than expected x)
on 15. March 2023, 15:24 by KNT
Agreed with woofer - lovely opening sequence!
on 15. March 2023, 15:13 by wooferzfg
Lovely opening :)
