Numbers on a thermometer must strictly increase as they move away from the bulb. Grey diamonds specify the ends of two adjoining thermometers.
If a number appears as the Xth cell from one end of a palindrome, it must also appear as the Xth cell from the other end.
Numbers along the indicated diagonal must sum to the given total.
F-puzzles link - link to solve online
Solution code: Row 9 followed by Column 6
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