Normal sudoku rules apply. In X-Sums sudoku, the clues outside the grid show the sum of the first X digits looking into the grid from the clue, where X is the first clue. In this puzzle, all clues inside and outside the grid are incorrect by 1.
Normal sudoku rules apply. In X-Sums sudoku, the clues outside the grid show the sum of the first X digits looking into the grid from the clue, where X is the first clue. In this puzzle, all clues inside and outside the grid are incorrect by 1.