Normal sudoku rules apply. A clue outside the grid shows the sum of the digits along the indicated diagonal. None of these individual clues is given in this puzzle but the sum of all the "?" clues together is 178.
Normal sudoku rules apply. A clue outside the grid shows the sum of the digits along the indicated diagonal. None of these individual clues is given in this puzzle but the sum of all the "?" clues together is 178.