Logic Masters Deutschland e.V.

Composed for Scojo's prompt for extra regions.

The idea (and the diamonds) come from this problem from MathGuy_12



Normal Sudoku rules: Place a digit from 1-8 in each cell such that there are no repeats within any row, column or box.

Yin Yang: shade some cells so that all shaded cells are orthogonally connected, all unshaded cells are orthogonally connected, and every 2x2 contains at least one of each.

The value of a shaded cell is double that of its digit, and the value of an unshaded cell is its digit.
Diamonds and Circles: Values count the number of cells seen orthogonally sharing the same shading as the cell (including the cell itself; the view interrupted by opposite shading).

Extra regions: digits in both Diamonds and Large Circles are set of 1-8.