Normal Sudoku rules apply. Digits outside the grid are either frame or x-sum clues or both. Frame gives sum of first 3 digits. X-sum gives the sum of the first X digits where X is in the first position.
Normal Sudoku rules apply. Digits outside the grid are either frame or x-sum clues or both. Frame gives sum of first 3 digits. X-sum gives the sum of the first X digits where X is in the first position.