Thermometer: digits increase, starting from the bulb.
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PS: if you like this puzzle, please also try my other easy, but popular Thermometer Sudokus:
Solution code: the top row from left to right
on 24. March 2026, 12:05 by Karitsu
After two of these in a row, I think I might have a new favorite thermos constructor!
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Thanks for the encouraging comment!
on 14. March 2026, 03:20 by Dee_Code
Such a fun puzzle, 21:31, but in snippets so, but the solve flow was a lot of fun
on 10. March 2026, 00:32 by mixus minimax
You must construct additional thermometers.
on 6. March 2026, 16:42 by Myfyr MJ
Very nice. Got easier as you went along. Puzzle pretty much collapsed at the end.
on 6. March 2026, 11:26 by superkinkel
Wow, this developed quite differently than I thought ... very interesting and interesting interactions between the thermos.
on 6. March 2026, 01:54 by YoooDeej
after all these thermometers I wont need to see a doctor for years! great puzzle!
on 5. March 2026, 21:37 by blackjackfitz
Huzzah!
on 5. March 2026, 20:03 by Ragna
This is my 4444. puzzle!
What a wonderful puzzle!
Thank you very much for this lovely gift. :-)))
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wow, 4444 solved puzzles is impressive! Thanks for chosing my Sudoku for this celebration!
| Difficulty: | ![]() |
| Rating: | 94 % |
| Solved: | 308 times |
| Observed: | 4 times |
| ID: | 000RRI |