Whispers in the Fog
(Published on 14. November 2025, 06:37 by greyden)
Whispers in the Fog
Rules:
1. Normal Sudoku rules apply. The digits 1-9 appear exactly once in every column, row and 3x3 box.
2. Fog. The grid is covered in fog. Placing a correct digit will clear the fog from that cell. No guessing is required. Due to how limited the fog reveal is, you will need to look in the corners of revealed cells for part of a clue to progress.
3. Anti-Knight. Cells separated by a knight's move in chess cannot contain the same digit.
4. Anti-King. Cells separated by a king's move in chess cannot contain the same digit.
5. German Whisper Lines. Adjacent digits on a green line must differ by at least 5.
6. Black Kropki Dots. Cells separated by a black dot are in the ratio of 1:2. Not all dots are given.
7. Box and Row Correlation. Boxes are numbered left to right, top to bottom. For each of the digits 1-9, in box 'N', the digit 'N' is in Row 'N'. (e.g. In Box 7, the '7' is in Row 7.)
Please Enjoy!
Solution code: Please enter the digits from Column 9 from top to bottom.
Comments
today, 10:48 by Tws
Very nice! Cool set of rules. No need for the GW in Box 9!
- Hi TWS. Glad you liked it. You're right, it isn't needed. But during testing, I felt the puzzle would be more approachable if there was clue there. - Greyden
today, 04:49 by greyden
Changed link to a puzzle with thicker whisper lines for better visibility.
yesterday, 20:41 by Gullie
I agree with grrz, the clue was almost invisible and therefore the puzzle is not really accessible for everybody; for instance people with less than perfect eyesight. It might’ve been intentional, but I found it to be not really a logic-clue. Only after revisiting the puzzle page and reading the comments, and then zooming in, I was able to continue.
yesterday, 06:54 by grrz
Thank you mikyvr for asking about the hidden whispers line! I spent 2 hours yesterday, not noticing that tiny triangle, trying to realize where is the tension in this puzzle… After I used it, solved it very quickly.
Making such tiny clue is… not nice.
yesterday, 01:17 by greyden
Rule Clarification regarding clues mostly hidden by fog.
on 14. November 2025, 22:38 by lsmooth
Cantabrigiensis me too briefly for about 15 Minutes. Then it went better for a bit and I got to like 20 digits. Then it took me a while to get the next digit, wasn't really stuck though, but alot of deducing possible digits in cells all over the place. When I finally got that next digit, I could fill in the rest of the grid within 10 Minutes or so.
Very nice puzzle, love it!
on 14. November 2025, 20:00 by Cantabrigiensis
Am I the only one to get two digits quickly, but then completely stuck?
EDIT: I discovered the cause of my confusion. I felt pretty sure I needed more information to continue so paid closer attention to what I could see in the newly-cleared cell. Zooming in helped!
Great puzzle; glad I persevered!
on 14. November 2025, 18:26 by Mup
super fun puzzle bro, got a bit intimidated cause of the last of difficulty rating but it was just perfect for my level :D
on 14. November 2025, 08:09 by Shuhua Milk
Nice!
