Numbers along an arrow must sum to the number shown in the circled cells.
Numbers on a thermometer must strictly increase as they move away from the bulb.
Each of the numbers in a quadruple constraint must appear in its four surrounding cells.
The highlighted cells create a disjoint group, containing the numbers 1-9. Each color will contain either 1-3, 4-6, or 7-9, to be determined by the solver.
F-puzzles link - link to solve online
Solution code: Row 9 followed by Column 4
on 16. May 2023, 23:24 by Myxo
Nice puzzle!
on 2. June 2021, 22:01 by peterkp
Thanks for a nice puzzle, enjoyed working through it.