Normal sudoku rules apply (Digits 1-9 in each row, column, box without repeats).
Digits separated by red Kropki dots are coprime. That is, their greatest common factor is 1. 1 is coprime with all integers.
If two digits, x and y, are separated by blue Kropki dots, then y = 3x + 1.
No negative constraint.
Solution code: Row 7, from left to right
on 1. December 2024, 01:52 by luisdias412
It's a really cool rule set, but there were many redundant red pairs
on 27. November 2024, 06:40 by Sonarym
Very nice. Loads of fun.
on 27. November 2024, 04:02 by PersonWhoExists50306
Minor clarification: There isn't any negative constraint
Please note: The German version of this page has changed. It is possible that this page does not contain the latest information.