Evolution
- Kropki dots
- Zipper lines
The brief
Normal sudoku rules apply.
Along a Zipper line, pairs of digits equidistant from the center of the line sum to the digit in that cell.
Black dots separate digits where one is double the other.
by Blobz by Blobz
Normal sudoku rules apply.
Along a Zipper line, pairs of digits equidistant from the center of the line sum to the digit in that cell.
Black dots separate digits where one is double the other.