Logic Masters Deutschland e.V.

Rules:
Normal sudoku rules apply: place the digits 1-9 once each in every row, column, and box.

Divide all cells that are not shaded gray into 1x2 dominoes, which do not occupy gray cells or overlap.

Make each domino red, blue, or yellow so that:
- Yellow dominoes contain consecutive digits
- Blue dominoes contain digits in a 1:2 ratio
- Red dominoes contain digits that sum to 10
(if you prefer, any other combination of 3 colors also works)

Dominoes of the same color cannot touch orthogonally.

The digit in a cell with an arrow indicates how many dominoes have at least one cell that appears in the given direction.