Logic Masters Deutschland e.V.

This puzzle is a collaboration between my oldest child and me - she picked line colors she liked, and I did placement and additional dots and XVs. Hope you all like it!

Rules:

- Normal sudoku rules apply.

- Dutch Whispers - neighboring digits along an orange Dutch Whisper line differ in value by at least 4.

- German Whispers - neighboring digits along a green German Whisper line differ in value by at least 5.

- Region Sum Lines - Box borders divide blue Region Sum lines into segments that sum to the same value. Different RSLs can have different values.

- Renban - purple Renban lines contain some group of consecutive digits in any order.

- XV sums - digits separated by an X sum to 10; digits separated by a V sum to 5. No negative constraint.

- Kropki dots - digits separated by a white Kropki dot have a difference in value of 1; digits separated by a black Kropki dot have a value ratio of 1:2. No negative constraint.

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Line Locations (for those with color difficulties):

Dutch Whisper - the octagon going from R3C4 clockwise back around to R4C3.

German Whispers - the lines from R2C7 to R4C8 and R6C2 to R8C3.

Region Sum Lines - the lines from R4C1 to R2C5 and R6C9 to R8C5.

Renbans - the lines from R2C5 to R2C7, R4C8 to R6C9, R8C3 to R8C5, and R4C1 to R6C2.

Sudokupad

Puzzle: