Normal sudoku rules apply. In any cell that contains a digit that is smaller than the digit in the diagonally adjacent upper right cell, the sum of those two digits is given, where a question mark can be replaced by any sum ranging from 3 to 17
Normal sudoku rules apply. In any cell that contains a digit that is smaller than the digit in the diagonally adjacent upper right cell, the sum of those two digits is given, where a question mark can be replaced by any sum ranging from 3 to 17