Normal sudoku rules apply. Little killer (Arrow) clues show the sum of the indicated diagonal. Sandwich product clues above the grid show the product of digits between the 1 and the 9 in that column. 'Parity Party' clues beside the grid show the product of the digits in that row as far as (and including) the first change of parity (odd/even). X-Factor clues below the grid show the product of the first X digits reading up, where X is the first digit.