Normal sudoku rules apply. The central 3x3 box of the puzzle forms a magic square. Ie each 3-cell row, column and main diagonal of that 3x3 box must sum to the same total. Digits in cages sum to the small clue in the top left corner of the cage. Digits cannot repeat within a cage. Cells separated by a white dot must contain consecutive digits. Cells separated by an X must contain digits summing to 10. Cells separated by a V must contain digits summing to 5.