Logic Masters Deutschland e.V.

Fresh off the misaligned zipper variant in Careless Zipper, I'm back with another zipper variant. This is my take on a cross between Zipper Lines and Thermos.

Rules:

• Sudoku: Place the digits 1-9 once each in every row, column, and 3x3 box.
• Zither Lines: Digits an equal distance from the center of a lavender and gray Zither Line must sum to DIFFERENT totals. Sum totals must strictly INCREASE from the center of the line to the ends of the line. For odd-length lines, the digit placed in the line's center must be LESS THAN the smallest sum total. Digits may repeat on a line, if allowed by other rules.
• For example: 785448 is a valid zither line, because the sums strictly increase from the center (5+4 < 8+4 < 7+8). Another example: 78948 is a valid zither line, because the sums strictly increase and are larger than the center digit (9 < 8+4 < 7+8).
• Kropki Pairs: Digits separated by a white dot are consecutive. Digits separated by a black dot are in a 2:1 ratio. Not all dots are necessarily given.

Streamers have permission to use this puzzle.

Play in SudokuPad