(+5)-Yang
(Published on 9. November 2025, 17:15 by SennyK)
A big thank you to Kaktuslav for his (+10)-Yang puzzle which I really enjoyed and decided to create my own with similiar theme.
I hope you will enjoy and I would be really grateful for all the comments and ratings.
Normal sudoku rules apply.
Yin-Yang: Shade some cells in the grid so that all shaded cells are orthogonally connected, all unshaded cells are orthogonally connected, and no 2×2 region is entirely shaded or entirely unshaded.
Values: A shaded cell containing digit x has value x+5; an unshaded cell has value equal to its digit.
Region sum lines: Blue lines are divided into segments by box borders. All segments along a single line must have the same sum of values (this sum may differ between lines).
Renban lines: Purple lines contain a set of consecutive values in any order.
Kropki dots: Cells connected by a white dot with equal sign have equal values. Cells connected by a black dot have values, one of which is double the other. Not all dots are necessarily given.
Dynamic Fog of War: The grid is partially covered in fog. Placing correct digits reveals their own cell and may also lift fog elsewhere in the grid. No guessing is required.
The Erica Series:
Episodes: 1, 2, 3, 4, 5, 6
If you liked this puzzle, I recommend trying out my other puzzles:
Symmetrical Fan
Night Club
Cops & Robbers
Broken Flashlight in the Dark
Blown Fuses in Electrical Installation
Important Hour on the Clock
Let Me Introduce Myself
Positive Symmetry
Pretty Odd Shaded Area <- Recommended for you!
It's What You Do in the Dark That Puts You in the Light
What Was the Sum Again?
Solution code: First (1st) row of the grid from left to right (with the symbol "/" marking borders between shaded and unshaded cells, e.g., 123/4567/89).
Comments
on 14. November 2025, 14:01 by QuiltyAsCharged
Excellent puzzle! Broke my brain a couple times. Note to self: the modifiers are not doublers, not doublers, not doublers...
on 12. November 2025, 12:01 by Exigus
Very lovely puzzle. Tricky start but then you get into it. Had a great time. Thanks!
on 11. November 2025, 07:49 by GreazeBull
Once I got my head round the ruleset for the break in I loved it, thanks!
on 10. November 2025, 17:38 by VitP
ANY yin-yang puzzle is automatically level 2.
THIS one is considerably harder than the minimum, and so must be AT LEAST level 3, and in the event, not higher.
as for quality, it meets the highest standard of such puzzles.
