Logic Masters Deutschland e.V.

Voxas
Divide the grid into 1x2 or 1x3 regions. Regions connected by a white dot must be of the same size and orientation, regions connected by a black dot must be of opposite size and orientation, and regions connected by a gray dot must be either of the same size or orientation, but not both.

TomTom
Place the digits 1-7 into the grid so that every digit appear exactly once in every row and column. If a Voxas box contains a TomTom clue, it becomes a TomTom cage. Digits inside a TomTom cage must give the indicated result when the indicated operation is applied. Division and subtraction cages are always a 1x2. TomTom cages may contain only one clue, which may or may not be at the top-left most position of the cage.

Kropki
Place the digits 1-7 into the grid so that every digit appear exactly once in every row and column. Digits separated by a white dot must have a difference of 1, digits separated by a black dot must be in a 1:2 ratio, and as an additional rule, digits separated by a gray dot must neither have a difference of 1, nor have a ratio of 1:2. Not all possible dots have been given.

Solve on Penpa+