Logic Masters Deutschland e.V.

This is my first time making a Japanese sum puzzle, I hope you enjoy it!

Rules:

Irregular sudoku rules apply. Place the digits 1 to 9 in each Row, Column, and Region.

XV: Digits in cells separated by an X sum to 10. Digits in cells separated by a V sum to 5. Not all Xs and Vs are necessarily given.

Japanese Sums: The colored squares outside the grid indicate the order of runs of contiguous cells found in that row or column that must be shaded in the color of the clue. The number in the colored square indicates the sum of the cells in the run. A '?' represents any positive number. There must be at least one unshaded cell between runs of the same color, though there is no need between runs of differing colors. All runs are given.

Solve online: CTC