Parity Fun 36
(Published on 4. July 2026, 10:00 by galium_odoratum)
Normal Sudoku rules apply.
Slow Difference Thermometers: Digits along a grey thermometer must stay the same or increase from the bulb to the tip. Additionally, the differences between adjacent digits along the thermometer must be strictly increasing as you move from the bulb toward the tip.
Global Entropy: Each 2x2 region must contain at least one low (1,2,3), middle (4,5,6) and high (7,8,9) digit.
Grey Square: A cell marked with a grey square must contain an even digit.
Play on SudokuPad
Try out the others of this series:
Parity Fun 20
Parity Fun 21
Parity Fun 22
Parity Fun 23
Parity Fun 24
Parity Fun 25
Parity Fun 26
Parity Fun 27
Parity Fun 28
Parity Fun 29
Parity Fun 30
Parity Fun 31
Parity Fun 32
Parity Fun 33
Parity Fun 34
Parity Fun 35
Solution code: Row 6
Comments
on 29. August 2026, 18:51 by annaeinachin
Very nice. I enjoyed this puzzle. Thank you for setting :)
on 20. July 2026, 05:39 by marajade
This was really cool—the slow difference thermometers were such an interesting rule to explore, and I really enjoyed how their logic interacted with the global entropy!
on 6. July 2026, 13:30 by VitP
any global entropy puzzle is going to be level 2 AT LEAST, unless you give a lot of extra clues. these UNIQUE thermometers will likely make the puzzle HARDER, as no standard procedures exist.
therefore, on the face of it, this puzzle is likely to be level 3.
anyone unfamiliar with global entropy will find it very hard.
in the event, no, this is NOT "approachable"
on 5. July 2026, 19:30 by macintux
I loved this puzzle. Definitely had to work for it, and without solution checking I would have probably had to start over once or twice because the math took me a while to sort out and I could easily have ended up with a broken puzzle near the end.
