Take a Zip
- Killer cages
The brief
- Normal sudoku rules apply, i.e. each row, column, and 3x3 region has to contain the digits from 1 to 9 once each.
- Zippers: On a lavender line, digits at the same distance to the center (marked by a dot) must add to the same sum. If the line has odd length, that sum must equal the digit at the line's center.
- Killer cages: Digits in a cage must sum to the clue in the top left.