Negative Entropy
(Published on 4. January 2026, 01:44 by EnPee)
This puzzle may be a nice introduction to the global entropy constraint if you've not tried it before. I've had feedback that it may feel like a 1.5, but have suggested 1* to start with.
Hope you enjoy it!
Rules
- Normal sudoku rules apply.
- Global Entropy: Each 2x2 area must contain at least one low digit (123), one medium digit (456) and one high digit (789)
- Little Killer: Numbers outside the grid give the sum of the digits along the indicated diagonal.
- German Whispers: Adjacent digits along a green line have a difference of at least 5.
- Renban: Digits on a purple line form a non-repeating consecutive set of digits in any order.
- Kropki: A black dot connects two digits where one is double the other.
Solution code: The diagonal from r9c1 (bottom left) to r1c9 (top right) - 9 digits.
Solved by Greg, anthe95, noodlehead, Pairot, thomamas, StevenS, milxqueen, gdc, Testpilot Pirx, jalebc, Rearden, jcgodart, cmigas, root_vegetable, maniacaljackal, Merovius, scushuaishuai, DanishDynamite, ... clapslat, nikka240, johngardner, Ikke Moon, Nagesh, L00ping007, Rad the Radical, CitrusGremlin, johnreid, elloschmello, Killer-Ly , Blummy, Crul, metacom, Martin28164, Kirra, Photyne, clamtrox
Comments
on 4. January 2026, 13:40 by Ragna
Very satisfying solve! Thank you. :-)
