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Standard Irregular Sudoku rules apply
❶ Quadruple: each of the numbers in the white circles must appear in the four surrounding cells at least once
❷ Thermo: Digits along thermometers must increase starting from the bulb
❸ Killer: cages sum to the total in the top-left corner.
Solution code: Row 5
on 4. September 2022, 12:49 by chain.reader
very nice, probably not 4 star though.
> thanks! And I agree that it is on the edge between 3 and 4. I tended to the 4 because of the final logic on high digits.