I am very proud to present what I believe to be a very hard Yin-Yang sudoku :-)
Hopefully this one will be good enough to make it to CTC channel, I would be really grateful if you could recommend it to them ❤️
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 value of a shaded cell equals its digit increased by the number of (up to 8) surrounding unshaded cells; a value of an unshaded cell equals its digit.
Killer: VALUES in a cage sum to the total given.
Little killer: A clue outside the grid gives the sum of the DIGITS along the indicated diagonal.
Dynamic Fog of War: The grid is partially covered in fog. Entering correct digits may clear fog somewhere in the grid. Guessing won't help.
The Erica Series:
Episodes: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
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?
(+5)-Yang <- Recommended for you!
Disgroup Joints
Find It All
What the Fog?
10-Arrows
Negative 8 YY <- Recommended for you!
Lösungscode: Eighth (8th) column of the grid from top to bottom (with the symbol "/" marking borders between shaded and unshaded cells, e.g., 123/4/5/67/89).
am 24. November 2025, 17:38 Uhr von kublai
Hard to crack, but ooh when it cracks. I had a bit of a gollum moment there cackling with glee when I saw the path. Thanks for a great puzzle!
am 22. November 2025, 22:46 Uhr von ymhsbmbesitwf
for me it was indeed very hard. it immediately feels like certain things want to happen - it took a long while to understand why and how. really cool