Normal sudoku rules apply. On either main diagonal (marked with a thin blue line), digits may not repeat. The 3x3 box borders divide thick blue lines into segments; each segment on a line has the same sum. Different lines may have different sums.
Normal sudoku rules apply. On either main diagonal (marked with a thin blue line), digits may not repeat. The 3x3 box borders divide thick blue lines into segments; each segment on a line has the same sum. Different lines may have different sums.