Logic Masters Deutschland e.V.

Thank you to gdc for testing the puzzle and being a sounding board for ideas. Thank you Jaze for the Zipper Line constraint idea.

Normal Sudoku Rules Apply

Fog of War
Most of the grid is covered in fog. As you solve more of the grid will appear.

Killer Cages.
Where cage totals are given, they are always in the top-most, then left-most corner of the cage, and digits within a cage must to sum to this total.
Digits MAY repeat within a cage.

Each Cage contains exactly one Zipper Line which takes up the full capacity of a cage, and only moves orthogonally.

Zipper Lines
Pairs of digits that are an equal distance from the centre of a lavender 'Zipper Line' must sum to that digit in the centre of the line. The central digit of each line has been highlighted with a dot.

CTC Link

Example Puzzle

Here is a 4 by 4 version of this specific ruleset.
CTC Link.

Example Puzzle

Here is a 4 by 4 example of a Zipper puzzle from Jaze (left) and it's solution (right). Notice how the ends of each line sum to the digit in the center of the line. Additionally, the long line also contains two more sums 4=1+3=1+3=2+2. You can play the example here.

Do you want to solve more?

Click here to search for more Zipper Lines puzzles on LMD.