Four Slow Thermos
(Published on 29. May 2026, 01:49 by mellowrobinson)
Normal Chaos Construction rules apply:
- Divide the grid into nine regions of nine orthogonally connected cells, and fill every cell with a digit from 1-9 so there aren't repeats in a row, column, or region.
Slow Thermometers:
- Along a gray line, digits must not decrease moving away from the bulb end.
- Additionally, two cells connected orthogonally by a thermometer line must be in the same region. Diagonal connections have no additional restriction.
Click here to solve
Solution code: Row 8, with dashes for borders between regions. e.g. 123-4-56-789
Comments
on 12. July 2026, 04:21 by Agent
Fun!
on 5. July 2026, 05:17 by GorgeousNicko
If I understand correctly, slowness on a thermometer can only have effect when the thermometer has a kink. Four of the thermometers are kinked and, so, potentially really slow. I can't say how many of those actually have repeated digits without perpetrating a spoiler.
on 11. June 2026, 05:27 by Nemefish
really fantastic. Enjoyed it a lot. Nothing makes me feel smarter than solving a chaos construction
on 2. June 2026, 21:05 by VWaldstein
natural solve path, with just the right amount of difficulty: each step felt incredibly logical and smooth!
on 2. June 2026, 19:50 by TheJRMY
This was my first successful chaos construction!
on 2. June 2026, 02:38 by CitrusGremlin
very fun chaos construction!
on 31. May 2026, 12:32 by kasperd
Various approaches needed through the puzzle, none of them very hard.
A couple of times I did need several minutes to spot the right question to ask. But once I found it, it was obvious.
Overall a great puzzle.
on 30. May 2026, 23:40 by fitzie
I gave extra points for using the coloring in the solution code, and for guessing my social security number ;)
on 30. May 2026, 20:39 by SennyK
Lovely puzzle, really enjoyed that! :-)
on 30. May 2026, 11:10 by DaniK
Really cool puzzle! great flow
on 29. May 2026, 23:49 by Exigus
Great stuff. Thanks!
on 29. May 2026, 21:33 by Fool on Hill
Fine approachable puzzle - looks more complicated than it is. Seems to me like a really good introduction to region building ideas - like regions needing to reach specific digits and irregular Sudoku patterns. Had a nice flow with plenty to think about, but no really hard steps. A really cool puzzle which I hope will help some newer solvers to learn new tricks.
on 29. May 2026, 20:22 by dzamie
Oh cool! Some really interesting parts to the break-in, and that one big slow thermo was fun to portion out.
on 29. May 2026, 19:06 by diracdeltafunk
Very fun and approachable while still having lots of interesting steps!
on 29. May 2026, 14:18 by Flinty
Excellent puzzle! :)
on 29. May 2026, 11:20 by Snookerfan
Great puzzle, solid 3 - 3.5 stars with an approachable break-in! Thanks
on 29. May 2026, 04:23 by Chaossudokusplease
Fantastic puzzle! Always love an approachable chaos construction, especially one like this where it's not too hard but you still have to think about the regions, which is always hard to balance. Great job!
on 29. May 2026, 02:56 by NXTMaster
I'm always impressed by easy puzzles that are also interesting, not just easy
