Rain Whispers
Normal sudoku rules apply. Adjacent digits along blue whisper-thermos must have strictly increasing differences from the bulb end (e.g. a whisper-thermo with digits 3-3-1-7 would have differences 0-2-6). At least one of the whisper-thermos in the puzzle must also be a regular thermo, with digits increasing from the bulb end.
Solution code: Row 5
on 27. February 2023, 22:38 by OutOfMyMindBRB
Very nice puzzle! Challenging and fun :-)
on 27. February 2023, 09:12 by Briks
I think it's not too difficult, just one guess. Once the path is set it solves quickly.
on 27. February 2023, 01:55 by rictech
Very challenging for me. I got quite a way through it with coloring, but had to make a guess at one point; I’m sure I missed some logic somewhere. Anyway, thanks for the puzzle!