Logic Masters Deutschland e.V.

1) Normal Sudoku rules apply

2) Dynamic fog: entering a correct digit will clear fog from that cell and may clear fog from other cells

3) Yin-Yang: shade some cells in the grid such that all shaded cells form a single orthogonally connected region and all unshaded cells form a single orthogonally connected region. No 2x2 square of cells may be entirely shaded or entirely unshaded. Cells marked by a square are shaded (cells with no square may be shaded or unshaded)

4) German Whispers: The shaded cells form a single German Whispers line. That is, any pair of orthogonally adjacent cells that are both shaded must have a difference of at least 5 (any pair of adjacent cells that are both unshaded, or one of each, has no restriction)

You can play it here: SudokuPad.