Logic Masters Deutschland e.V.

This sudoku is a successor to 19 Shapes of Grey and The Grass Is Always Greener in the Fog. If you want to get a better feeling for the rules, it might help solving these two first, although it's not necessary.

I've been planning on creating another sudoku in this style, but when Flinty wrote a comment on a Puzzle Patzer video, (half-jokingly) suggesting a Dutch Flat Mates version, some ideas instantly came to mind. I hope you like the result! :D


Solve with SudokuPad.

Rules:

• Normal sudoku rules apply.


• Digits separated by a black shape are in a 1:2 ratio. Green shapes don't have such a restriction.


• Shapes are made up of semi-circles and semi-squares, resulting in either a full circle, a full square, or a "circle-square", these may be rotated in any direction.
• Digits separated by a circle add up to 9, digits separated by a circle-square add up to 12, and digits separated by a square add up to 15.


• Dutch Flatmates: 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.


• Fog: The grid is partially covered with fog. Correctly placed digits will clear the fog around that cell. No guessing is required.