Logic Masters Deutschland e.V.

Modified Squishdoku rule is inspired from There Are Too Many Things In This Apartment by Oddlyeven.

Modified Squishdoku: Place a digit from 0 to 9 in every cell, so that no digit repeats in any row, column, or 3x3 region. Cells on region borders (dashed lines in row 3, row 5, column 3, and column 5) are shared between multiple regions. Regions are numbered 1–9 in reading order (top-left to bottom-right). For every region N, the digit N cannot appear within it.

Dutch Flat Mates: Every 5 in the grid must have a 1 directly above it or a 9 directly below it. It may have both, but it doesn’t need both.

XV: Cells separated by a V must have digits that sum to 5. Cells separated by an X must have digits that sum to 10. Not all possible X or V marks are given.

Dynamic Fog: The grid begins obscured by fog that clears based on custom triggers rather than just fixed adjacent cells. Correctly placing a digit may lift the fog from that specific cell, several distant cells, or even no cells at all.

CTC Link

Puzzle:

I have a hard time enjoying to solve any fog of war or dutch flat mates sudokus, so consider this as an apology to the creator of such constraints.