Normal sudoku rules apply. Every 2x2 box must contain one digit from 1-3, one from 4-6, and one from 7-9. Digits along a thermometer must strictly increase from the bulb end.
I’m coming out with a few entropy puzzles soon, here’s a little teaser
https://sudokupad.app/1b4eypbb1m
Solution code: The middle row of the puzzle
Last changed on on 20. February 2026, 21:35
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