YKK
(Published on 26. April 2026, 00:00 by Sudokujoker)
This puzzle was my test of how a sudoku would work that features only zipper lines (no other constraints or given digits). It was fun to make and should be a fairly easy one to solve :)
Normal sudoku rules apply: place the digits 1-9 in each row, column and 3x3 box.
Every coloured line is a zipper line. Pairs of cells an equal distance from the centre of a zipper sum to the digit in the central cell of that zipper.
Sudokupad link: Sudokupad.app/37i9uwc1xh
Solution code: Row 9
Comments
on 30. April 2026, 19:10 by Juburin
Took me way too long to find the zipper, but then it was easy
on 30. April 2026, 15:29 by pmays123
That made made me smile. Thanks!
on 28. April 2026, 06:14 by zee_zuper_beeg
Unzips quickly once you find the zipper :)
on 27. April 2026, 21:07 by ChulioZ
Thanks for the very cool break-in and smoothly solvable snack! I created a video for my YouTube of channel of my solve -- please take a look if you like! https://www.youtube.com/watch?v=P9wZZCIE7XQ
on 27. April 2026, 14:02 by baku
What an incrediable breakthrought! I can only solve in awe while thinking on how someone can make this up. Thanks for sharing, awesome puzzle!
on 27. April 2026, 07:29 by JVA
Very nice, very cheeky
on 27. April 2026, 06:38 by RedBarchetta
After fussing with one of the lines, I started to see what was going on. Had a great laugh and lots of fun. Thanks!
on 27. April 2026, 04:24 by jeffrey.l.byrd19
Very fun puzzle! Creative and amusing. I stared at it for almost 10 minutes before I saw what to do, but from there it’s very straightforward.
on 27. April 2026, 03:17 by Decapod
Beautifully constructed! Very nice puzzle.
on 26. April 2026, 18:07 by Sudokujoker
Thanks to everyone for the feedback and positive ratings! Glad that so many enjoyed it :)
on 26. April 2026, 11:54 by Franjo
Funny break-in! Thank you very much for creating and sharing this lovely puzzle.
on 26. April 2026, 03:47 by marajade
Loved this! Easy but a ton of fun from beginning to end!
on 26. April 2026, 00:53 by Jasperrr
Very interesting idea, really liked it. Not that hard but I wouldn't call it an easy 1* either
on 26. April 2026, 00:19 by Dr Logic
Wow. Despite being very easy, this puzzle was a delight to solve. Made even better with a wonderful fact at the end! Thanks for setting!
