What's the Sequency, Kenneth?
(Published on 19. December 2025, 16:23 by WEBthe3rd)
Normal sudoku rules apply.
Dynamic fog - The grid is covered in fog. A correctly placed digit will clear any fog in that cell, and potentially in other cells as well. No guessing is required.
Sequence lines - Dark gray lines contain an ordered set of digits with a constant difference between adjacent cells, i.e., 1-2-3, 2-5-8 or 3-3-3, but not 1-3-2.
Palindromes - Light gray lines contain digits that read the same in either direction.
German whispers - Light green lines contain digits that must differ by at least 5 from their neighbors on the line.
Parity lines - Red lines contain digits that alternate even and odd along the line.
3-modular lines - Teal lines contain one each from the sets (147) (258) and (369) for every sequence of three consecutive digits.
Region sum lines - Blue lines are split by the region boundaries into segments that have the same sum.
Kropki dots - Digits separated by a white dot are consecutive, and not all dots are given.
Solution code: Row 4 from left to right
Comments
on 10. January 2026, 03:27 by MikeMeech
I loved this puzzle!
I really enjoy puzzles where you end up colouring the whole grid, but colourblindness makes it challenging.
I created a custom pallet for myself, which helps a lot, but it gets tricky in fog puzzles, because then there's 18 different shades instead of 9.
I always appreciate when setters label the lines, so thanks!
on 21. December 2025, 05:40 by Chaotix37
Overall the puzzle is nice. I was confused on the coloring on the lines between modular and region sum lines, as it turned out one blue is a region sum lines, which makes the puzzle a unique solution.
on 20. December 2025, 22:23 by WEBthe3rd
Improved the colorblind version, replacing some lines with symbols to reduce clutter.
on 20. December 2025, 21:47 by WEBthe3rd
Page formatting
on 20. December 2025, 21:47 by WEBthe3rd
Added colorblind-friendly version :)
on 20. December 2025, 19:27 by QuiltyAsCharged
Very nice! Though I also got mixed up on colors. Region sums are blue, modular lines are light blue :)
on 20. December 2025, 09:58 by AnebodaSlatorp
This is great, give it a go, keep an eye on the colours of the lines and you will be fine
on 20. December 2025, 03:04 by PinkNickels
It's really helpful for us colorblind folks when setters put letters near lines so we can see (RB, GW, RSL, etc.)
on 20. December 2025, 00:00 by Myfyr MJ
Very nice and easy. Smooth.
on 19. December 2025, 22:21 by WEBthe3rd
Tweaked the coloring of the 3-modular line based on feedback in the comments.
on 19. December 2025, 20:52 by TheJRMY
Brilliant. Giving this the highest rating was automatic for this person.
on 19. December 2025, 17:23 by Rockon101000
Incredible flow and logic! I would rate 6/5 if I could. My only concern is I would have gone with a slightly more teal color for the modulo 3 line, as I found it somewhat hard to decipher from to the whispers lines.
