Happy birthday, Hilde!
(Published yesterday, 20:21 by olima)
Hilde zum 69. Geburtstag

Regeln:
⚪ Normal Sudoku rules apply.
⚪
Thermometer: Digits on thermos increase from the bulb to the tip.
⚪
Odd: The light grey circle contains an odd digit.
⚪
Quadruple: Digits in a circle appear at least once in the four cells touching the circle.
Link: Sudoku-Pad
Solution code: row 9
Solved by jalebc, JayBird, jadezki, fergus, brimmy, Onyx, ymhsbmbesitwf, Debba