Zipper Line: Along Zipper lines, pairs of digits equidistant from the center of the line have the same sum. For Zipper lines of odd length, that sum is the central digit on the line.
Kropki pairs: Digits in cells separated by a black dot are in a 2:1 ratio. Digits in cells separated by a white dot are consecutive. Not all dots are necessarily given.
We categorized this puzzle as Strong Indigestion. For more information about our difficulty categories, please visit our website, Missing Deck Puzzles, where we publish a new puzzle each day.
Try the puzzle on the SudokuPad app by Sven Neumann.
Solution code: Column 4, top to bottom, 9 digits no spaces
on 13. February 2025, 00:55 by Ganbatte
Took me three days but I did it! Fun puzzle.
on 9. February 2025, 11:39 by damo_89
This became much easier when I remembered how zipper lines worked and stopped trying to treat them like arrows that go in two directions. Really nice.
on 9. February 2025, 04:03 by Allagem
Really fun Zipper Line puzzle without crazy hard math or set theory! This actually closely resembles a puzzle I was halfway through setting. Oh well, this one was better anyway :)
In my futile effort to have consistent constraint graphics, I remade this puzzle in an alternate style that I personally prefer. Feel free to use it if you'd like, and if not, that's ok too :) Thanks for the great puzzle!
https://sudokupad.app/w1fl3hjhbv