Logic Masters Deutschland e.V.

Why-Why?

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.

SudokuPad Link

If you liked this puzzle, I recommend trying out my other puzzles:

The Erica Series:
★☆☆☆☆: 1, 2, 4, 5, 6, 12, 15, 17, 23, 26, 27
★★☆☆☆: 3, 7, 8, 10, 11, 13, 14, 16, 18, 20, 24, 25
★★★☆☆: 9, 19, 21, 22

Shading/Ying-Yang:
★★☆☆☆: Pretty Odd Shaded Area
★★★☆☆: (+5)-Yang, Negative 8 YY
★★★★★: Why-Why?

Fog of War:
★☆☆☆☆: Erica 12, Erica 17
★★☆☆☆: It's What You Do in the Dark That Puts You in the Light, Find It All, What the Fog?, Erica 20
★★★☆☆: Broken Flashlight in the Dark

Pencil Puzzle/Sudoku Hybrid:
★★☆☆☆: Masyu (Short) Sudoku
★★★☆☆: Tetromino Sudoku

Various Puzzles:
★☆☆☆☆: Blown Fuses in Electrical Installation, Let Me Introduce Myself, French Wrench
★★☆☆☆: Symmetrical Fan, Night Club, Important Hour on the Clock, What Was the Sum Again?, Disgroup Joints, 10-Arrows, Antiking Dutch Skyscrapers
★★★☆☆: Cops & Robbers, Positive Symmetry, Doppelgänger Killer 1-25
★★★★☆: Liars. Liars Everywhere.