Normal sudoku rules apply. Cells an equal distance from the center of the Zipper lines must sum to the cell in the center of the line. Two separate straight lines pass through r5c5. Digits in cages must sum to the number in the corner of the cage.
Normal sudoku rules apply. Cells an equal distance from the center of the Zipper lines must sum to the cell in the center of the line. Two separate straight lines pass through r5c5. Digits in cages must sum to the number in the corner of the cage.