Heyawake Chaos
(Published on 27. January 2026, 07:31 by mellowrobinson)
This puzzle was inspired by SennyK's Heyawake Sudoku. Stay tuned for another Heyawake Chaos Construction from the both of us!
- Chaos Construction:
- Draw region borders in the grid so that:
- There are nine regions, and each region contains the digits 1-9 once each.
- Digits do not repeat in a row or column.
- The grid can also be completed by the Heyawake rules explained below.
- Some region borders are given.
- Heyawake:
- Shade some cells so that no two shaded cells are orthogonally adjacent, and all unshaded cells are orthogonally connected.
- There cannot be a horizontal or vertical line of unshaded cells that goes through 2 or more region borders.
- The digit in a circle indicates the number of shaded cells in its region.
- The digit on a square indicates the number of unshaded cells in the (up to 9) surrounding cells.
- A small number clue indicates the sum of shaded digits in its region.
Solution code: shaded digits in the top four rows
Comments
on 1. February 2026, 21:32 by randomra
A lot is going on in this puzzle. Every type of info was used throughout my solve and the difficulty was consistent throughout too! A great experience!
on 29. January 2026, 15:27 by gdc
Very fun! I initially wanted to skip this because pencilpuzzles are not my strength, but my brain was itching me "what about the heya CC?", so I finally gave it a try.
It took me a bit to find a good notation, which I think is very important for puzzles like these. The deductions are definitely all very fair and smooth, but it's still a 4* that requires some heyawake basics :P
on 27. January 2026, 19:10 by Franjo
Thank you very much for creating and sharing this interesting CC-puzzle. I love the combination with Heyawacky.
on 27. January 2026, 08:23 by SennyK
Lovely! I really like how things are working in your version, nicely done. Thank you for this very fun to solve puzzle :-)
