Normal sudoku rules do NOT apply. Fill the grid with digits 1-9, such that no digit repeats in any row, column or box. The set of digits in each row or column is unique, eg. if a row contains the digits 1234, no other row or column may contain exactly those digits. The digits in every row, column and box sum to x, where x has to be determined by the solver. Digits separated by an X sum to 10. Digits separated by a V sum to 5. Not all Xs and Vs are necessarily given.