Normal sudoku rules apply. Place the numbers 1-4, once each, into every row, column and box. Digits an equal distance from the center of a gray 'Zipper Line' must sum to the digit in the middle of that line. A digit inside a circle indicates how many circles that digit appears in.
f-puzzles: https://f-puzzles.com/?id=ywrvx43x
Sudokupad: https://sudokupad.app/y56vprfooh
Solution code: 8 digits: row 1, then row 2
on 19. June 2024, 17:04 by zimmicks
5:10
Quite enjoyable!
on 16. April 2024, 14:12 by mnstrmisha
really cute and clever!
on 15. February 2024, 23:47 by luda3
Really nice intro that didn't feel trivial. Thanks for sharing :)
on 15. January 2024, 16:19 by ave
Easy fun! Lovely! Thanks, Kitty Trouble!
on 4. November 2023, 01:52 by Sinya
easy but cute!
on 31. October 2023, 22:28 by Kitty Trouble
Whoops, changed fpuzzles link to not give away solution
on 31. October 2023, 17:34 by fpac
the fpuzzles link reveals the solution
on 31. October 2023, 14:26 by BakBak
Super easy but a great introduction to both constraints
on 31. October 2023, 05:43 by Shuhua Milk
Very nice!
on 31. October 2023, 05:28 by Scojo
Cute puzzle. It was an enjoyable 18 seconds :)