Logic Masters Deutschland e.V.

If you like this 6x6 puzzle, then be sure to try the 9x9 variant with the same rules, that I posted here recently: Thirteen in the Shade.

Rules
Standard sudoku rules apply.

V: Cells separated by a V sum to 5.

Yin-yang: Shade some cells such that all shaded cells are orthogonally connected, all unshaded cells are orthogonally connected, and no 2 by 2 area is fully shaded or unshaded.

10 sums: In each row/column (2 or more) connected shaded cells sum to 10. See example below.

Circles: A digit in a circle gives the number of cells in the (up to) 9 surrounding cells, including itself, that are shaded. All possible circles are given.


Link: Play on CtC




Example with 10 sums in a 6x6 sudoku: In each row/column (2 or more) connected shaded cells sum to 10.