Logic Masters Deutschland e.V.

Standard Sudoku rules apply.
Fill in the grid with the numbers 1-9 so that the numbers are not repeated in each row, column, and each 3x3 area (box) separated by a bold line.

Region Sum Lines rule apply.
Each blue line travels through multiple 3x3 regions.
Along each line, the sum of the digits within each region is equal.
Different lines may or may not have different sums.

XV rules apply.
Digits joined by a V sum to 5.
Digits joined by a X sum to 10.
Not all Xs or Vs are given.

Kropki pairs rules apply.
Cells separated by a black dot are in a 1:2 ratio.
Not all dots are given.

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