Yin-Yang-Yong
(Published on 6. April 2025, 12:31 by Fenners)
Three types of shading? Chaos Construction? Why not?
Thanks go out to all those who tested!
Puzzle: Yin-Yang-Yong
Rules:
Normal Sudoku rules apply. Place the digits 1-9 once in each row, column and 9-cell region.
Yin-Yang-Yong: There are three shading orientations - Light, Medium and Dark. Construct a shading of the grid where all shading orientations themselves are orthogonally connected and no 2x2 area is entirely composed of one shading orientation.
Arrows: The digits on a tail of an arrow sum to the digit in the bulb. A tail of an arrow has the same shading orientation across it's length but must have a different shading orientation to it's bulb.
Chaos Construction. Construct nine 9-cell regions in the grid. Each region must be entirely composed of the same shading orientation.
Kropki: Digits separated by a white dot are consecutive. Digits separated by a black dot are in a 1:2 ratio. Not all dots are necessarily given.
Solution code: Row 5, left to right, 9 digits no spaces:
Comments
on 10. April 2025, 15:00 by dumediat
Excellent puzzle, thank you!
on 9. April 2025, 18:16 by Snookerfan
Really fun puzzle! I tried your second one first, which gave me some insights to attack this one a bit more efficiently. Thank you
on 8. April 2025, 21:45 by Titus Adduxas
That was really enjoyable. Funnily enough I did the other one first having given up on this one first time round! Glad I came back to it though because it’s excellent.
on 8. April 2025, 21:37 by Titus Adduxas
That was really enjoyable. Funnily enough I did the other one first having given up on this one first time round! Glad I came back to it though because it’s excellent.
on 8. April 2025, 04:18 by Douglass
Perfect puzzle with my two favourite rulesets! Thank you and please make more :)
on 8. April 2025, 03:38 by THef of Time
Great puzzle! Flowed lovely although I did worry I'd messed up my shading at one point when I forgot about the orthogonal connection constraint but luckily my logic was still sound and it worked out. :)
on 7. April 2025, 13:29 by 9Rookienumbers
I was afraid I would have trouble keeping track of regions/YYY, but it all fell nicely into place. Wonderful construction
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Thanks to all for your lovely comments. I've got a new one coming soon, which is very similar but doesn't require the Kropki dots. Just in testing at the moment! -- Fenners
on 7. April 2025, 13:07 by Franjo
I’m about to copy the comment of QAC who wrote down exactly what I thought… Thank you very much for creating and sharing this lovely CC-puzzle.
on 7. April 2025, 06:30 by QuiltyAsCharged
Fantastic puzzle! It's surprisingly smooth and approachable for this combination of rules.
on 7. April 2025, 00:26 by waffles_the_dog
Really fun puzzle, didn't reason about the way three colours would interact at first, but once I drew a bunch of lines across the grid and understood how they worked it solved really cleanly.
Thanks!
on 6. April 2025, 18:09 by seh_bas
really enjoyable mix of CC and YYY. THX <3
on 6. April 2025, 14:21 by Visumation
Very cool and approachable puzzle. Really enjoyed that. Thanks
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Thank you Visumation! Glad to hear you enjoyed it. -- Fenners
