Normal sudoku rules apply. In the positive diagonals (ie the blue marked diagonal and the diagonals parallel to it), the difference between two neighboring digits is only 4 or 5. Along the blue marked diagonal all digits are different.
Normal sudoku rules apply. In the positive diagonals (ie the blue marked diagonal and the diagonals parallel to it), the difference between two neighboring digits is only 4 or 5. Along the blue marked diagonal all digits are different.