Standard Sudoku rules apply. Additionally, every pair of digits occurs as (orthogonal) neighbours in the grid the same number of times.
Lösungscode: Last two rows
am 24. Februar 2026, 09:53 Uhr von WardBeullens
Add "orthogonal".
am 23. Februar 2026, 21:21 Uhr von WardBeullens
added online solving tool tag