Logic Masters Deutschland e.V.

Rules:

Normal Sudoku rules apply.
Place the digits 1-9 once each into every row, column, and box.

For each cell that contains arrows, shade all cells that can be reached by any combination of one-cell movements limited to the directions given by the arrows, starting from that cell; this includes all combinations that use one direction, multiple directions, and even no directions (the starting cell with arrows is included). The sum of the digits in all those shaded cells is given by the number in the cell with arrows.

Each shaded region is separate and has no impact on the shading of other regions.
A cell may be shaded into multiple regions.

CtC link

Good luck and fun solving!