Normal sudoku rules apply. Orthogonal neighbours (ie cells sharing an edge) are never consecutive. In the positive diagonals (ie diagonals sloping from SW to NE), the sum of neighbours is at most 11.
Normal sudoku rules apply. Orthogonal neighbours (ie cells sharing an edge) are never consecutive. In the positive diagonals (ie diagonals sloping from SW to NE), the sum of neighbours is at most 11.