Normal sudoku rules apply.
Grey lines ("2" and "r") are palindromes and read the same in both directions.
Digits on the thermo ("π") strictly increase from the bulb end.
Digits separated by X sum to 10; digits separated by V sum to 5. Not all such X's and V's are shown.
Have fun, leave a comment if you enjoy the puzzle!
Solution code: Row 2
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