Normal Sudoku rules apply.
Two digits separated by a black dot are in a 1:2 ratio, i.e. one is double the other.
Dutch Whisper Lines: Two adjacent digits joined by an orange line differ by at least 4.
German Whisper Lines: Two adjacent digits joined by a green line differ by at least 5.
Thermometer: Digits strictly increase from the bulb to the tip of the thermometer.
Digits in a cage must be distinct and must add up to the sum indicated in the top left corner of the cage.
Solution code: Row 2
on 23. September 2026, 16:10 by DutchMark
I had to scratch my head a couple of times, but overall it was a fun puzzle.
Thank you yeetcode
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