Normal sudoku rules apply.
Pro Knight: The digits 1 and 2 must see a copy of themselves by a chess knight's move.
Mystery Slow Thermo: Blue lines are slow thermometers with a bulb at one end to be determined by the solver. Digits along the thermos must increase or stay the same starting from the bulb end.
Solution code: column 1
on 17. April 2022, 21:33 by Bankey
Fun puzzle. Looks easier than it is! Thanks for setting, @ Scruffamudda :)