XV-constraint Sudoku Snack
The brief
Normal irregular 7x7 Sudoku rules apply, i.e. each row, column and region has to contain the digits from 1 to 7. XV constraint: Orthogonally adjacent digits NEVER sum to either 5 or 10.
by sujoyku by sujoyku
Normal irregular 7x7 Sudoku rules apply, i.e. each row, column and region has to contain the digits from 1 to 7. XV constraint: Orthogonally adjacent digits NEVER sum to either 5 or 10.