Quadruple Vision Chaos Construction
(Published on 29. June 2026, 22:43 by Christounet)
Here is another chaos construction combining quadruple clues and a line of sight constraint. Difficulty should be around 3/4, with maybe a couple harder clues during the solve. Try the easy example first, as an easy intro to the concept. Note that the puzzle is solvable without the given 9, but it made the irregular resolution much harder than what I was aiming for. Have fun solving!
The puzzle :
Rules :
- Chaos construction : Divide the grid into orthogonally connected 9-cell regions such that each cell is part of exactly one region. Fill the grid with digits 1-9 such that no digit repeats in any row, column or region.
- Quad clues : Digits in a white circle must appear at least once in the four surrounding cells. Each digit must be in a different region from the other digits in the circle. Each digit indicates the number of cells seen horizontally or vertically from the cell where the digit is, including that cell. Region borders block vision. A question mark stands for an unknown digit, to be determined by the solver.
Example puzzle :
Solution code: Column 7, with hyphens (-) for region borders. (Example: 123-45-6-7-89)
Comments
on 14. July 2026, 04:35 by MaizeGator
outstanding. Some parts pulled the wool over my eyes for a bit, but felt a solid 4* for me regardless
on 11. July 2026, 02:19 by BloodbuzzCorio
What a great puzzle. I did find both the region building and sudoku pretty difficult - but both very fair and extremely rewarding. Christounet thanks very much for setting and sharing!
on 6. July 2026, 13:59 by elpadrinoIV
Really nice puzzle!
Thanks for setting it!
It went super smooth until the 9 clue in the quadruple. I don't think I used the given 9 clue at all. Should that have helped me with the 9 quad region?
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The given 9 was only here to make the irregular sudoku resolution easier, because I did not want that part to take too much energy compared to the construction part. So that given 9 is indeed not needed as I said in my intro of the puzzle. It is even a nice coloring exercice if you enjoy a harder sudoku. Glad you enjoyed. Thanks for the feedback.
on 3. July 2026, 19:00 by DaniK
what a wonderful (and challenging) puzzle!
on 2. July 2026, 11:46 by PierreTombal
That was a fun puzzle. Initially I was fairly clueless how to even start, but the example puzzle was a great help for understanding the region building patterns.
on 1. July 2026, 08:07 by BlackRaven
Genius setting! It wasn't as hard as I thought it would be.
on 30. June 2026, 23:24 by Myxo
Awesome! A 5* difficulty imo.
on 30. June 2026, 23:04 by cyddrdrd
Wow the region building is so cool!
on 30. June 2026, 17:41 by War
Fantastic!
on 30. June 2026, 16:28 by Franjo
Thank you very much for creating and sharing another fantastic CC-puzzle. Love these Quadruple-Cave-Clues.
on 30. June 2026, 14:13 by Kavman15
Great and fun puzzle. Love the rule set!
on 30. June 2026, 14:03 by marcmees
beautiful construction puzzle. Flows very naturally. Thanks
on 30. June 2026, 11:10 by Snookerfan
Brilliant puzzle! Very nice twist on the rules with lovely logic especially region building logic, but also a few sudoku surprises, both because of the quadruple clues. Thanks!
on 30. June 2026, 02:45 by RedBulls75
I am only halfway through this after an hour, but this is already the best sudoku I have ever attempted. Never have I had clues guide me so seamlessly to a solution (so far)!
on 29. June 2026, 22:45 by Piatato
Awesome! Fun ruleset and an engaging and rewarding solve! :D
