Unique Under the Fog 6.0
(Published on 17. May 2025, 07:47 by Visumation)
Rules:
Normal sudoku rules apply.
Black numbers with an arrow outside the grid are little killer clues, and indicate the sum of the digits on the diagonal pointed to.
Red numbers outside the grid are X-sums clues, and indicate the sum of the first X digits in that row or column, where X is the first digit in that row or column.
Digits on a purple Renban line form a non-repeating set of consecutive digits. (RB) ALL Renban lines in this puzzle are exactly three cells long.
Neighbouring digits on a green German Whisper line must have a difference of at least 5. (GW)
Box borders divide blue Region Sum lines into segments with the same sum. (RS)
Each constraint type may contain no repeated digits anywhere in this puzzle. Eg. If one renban line contains a 5, then no other renban line may contain a 5.
Additionally the grid is partially covered in fog. Placing a correct digit may clear fog in somewhere in the grid.
Solution code: Row 7
Comments
on 21. May 2025, 19:55 by CanadianLeviathan
Took me longer than I'd like to admit to see a few of the conflicts. Fun and rewarding!
on 21. May 2025, 16:38 by Friedhelm
Just fun. And hard work :-)
on 20. May 2025, 11:51 by 9Rookienumbers
Still a big fan of the series! This one was a little easier and had a great break-in
on 20. May 2025, 06:58 by QuiltyAsCharged
Another great entry in this series! This one is a bit easier than the last couple puzzles, but has plenty of tricks up its sleeves.
If you publish Unique Under the Fog 100.0, I'll still keep solving them and hoping for more :)
on 19. May 2025, 16:31 by poplass3
Great puzzle with clever deductions, especially the break-in.
on 19. May 2025, 11:21 by madhupt
Great fun and very smooth.
on 18. May 2025, 19:13 by VicJameson
Another really fun puzzle, thanks. For some reason I had real difficulty breaking into this one, but everything after that flowed beautifully.
on 17. May 2025, 21:58 by Myfyr MJ
Tricky but fun.
on 17. May 2025, 16:55 by ValeMK
Probably my favourite puzzle on this platform. Well done and thanks
on 17. May 2025, 14:28 by Franjo
As Simon pointed out recently this unique concept gives big fun. Thank you very much for creating and sharing another one of these.
on 17. May 2025, 13:08 by matthewrtims
Fun puzzle once I remembered the non-repeat-per-constraint rule. Maybe I was missing something, but there were a few times I had to place a digit based on a shape in the grid assuming what was under the fog that I wasn't thrilled about. But overall real enjoyable puzzle still.
on 17. May 2025, 09:42 by Smiguli
Very good puzzle.
Might be worth specifying that X-sum clue includes the whole sum for the uniqueness constraint.
on 17. May 2025, 09:07 by da-hans
Again very nice puzzle. A little more approachable than the last one, so I gave it 2*.
on 17. May 2025, 08:43 by rameshsrivats
Great puzzle as always. For some reason, I found this a lot easier than the previous ones.
