Foggy German Yin-Yang
(Published yesterday, 23:52 by GBPack)
1) Normal Sudoku rules apply
2) Dynamic fog: entering a correct digit will clear fog from that cell and may clear fog from other cells
3) Yin-Yang: shade some cells in the grid such that all shaded cells form a single orthogonally connected region and all unshaded cells form a single orthogonally connected region. No 2x2 square of cells may be entirely shaded or entirely unshaded. Cells marked by a square are shaded (cells with no square may be shaded or unshaded)
4) German Whispers: The shaded cells form a single German Whispers line. That is, any pair of orthogonally adjacent cells that are both shaded must have a difference of at least 5 (any pair of adjacent cells that are both unshaded, or one of each, has no restriction)
You can play it here: SudokuPad.
Solution code: Row 3
Comments
today, 20:20 by RenBanned
Shading the cells makes it hard to see the fog, so when the last of the fog is lifted it is unexpected and clarifies things for the last few ambiguous cells. Clever and fun, loved it.
today, 20:04 by jhow25
@firespire Thank you!
today, 18:20 by dzamie
Took a bit to break in, but after that it was a pretty smooth solve. My favorite part was probably the penultimate fog reveal, since I had previously made a small, at the time irrelevant, assumption that it proved false and helped with the solve.
today, 18:01 by GBPack
Clarity on the German Whispers rule: the point is that the shaded yin-yang region has a German Whispers property for all adjacent cells (that are both shaded). I think I worded the rule poorly--there isn't actually a "line". It's just normal yin-yang, but any two shaded cells that are adjacent must be at least 5 different
today, 13:44 by Gullie
What a lovely puzzle! Really enjoyed how linear the path was. Thanks for sharing!
today, 13:36 by firespire
@jhow25 I struggled to understand "Single Line", whether it referred to it being non branching or single thickness. I got through it regardless and can confirm the German Whispers area DOES 'T' and branch.
today, 06:39 by jhow25
What does "Single Line" mean, for example can a "T" be formed? By that I mean, a entrance and an exit, and then there is a single cell adjacent to the path.
today, 02:01 by tryote
Fun!
