Thermometers: Digits along a thermometer must strictly increase starting from the bulb.
f-puzzles: https://f-puzzles.com/?id=yjafc2qe
CTC: https://tinyurl.com/c7deuvmj
Solution code: Column 2 + Row 5 (18 digits)
on 3. September 2021, 20:56 by SSG
Added CTC app link.
on 11. August 2021, 17:36 by Hausigel_mod
Added label for Online solving tool