Logic Masters Deutschland e.V.

• Balanced Sudoku: Place the numbers -4 to 4 once each in every row, column, and 3x3 box.
• Between or Double: Each line with circles on the end is either a Between Line (meaning, the numbers on the line must be strictly between the numbers on the circles) OR a Double Arrow (meaning, the numbers on the line must have the same sum as the numbers in the circles), but cannot be both.
• Region Sum lines: Box borders divide each blue line into segments. For each blue line, all of its segments must have the same sum (different lines may have different sums).
• Zipper lines: On a purple line, each pair of numbers equidistant from the center dot must sum to the number in that dot.
• Ten Lines: Each gray line must be divided into one or more non-overlapping groups of numbers that sum to (positive) ten.
• (Partial) Kropki: Cells separated by a white dot are consecutive, cells separated by a black dot have a 1:2 ratio. Not all dots are given.

SudokuPad (for the answer check, enter the absolute value of each digit)

Penpa (no solution check included)