Normal sudoku rules apply. Cells along arrows must sum to the digit in the attached circle. Clues outside the grid indicate the sum of digits "sandwiched" between the 1 and 9 in that row or column.
Normal sudoku rules apply. Cells along arrows must sum to the digit in the attached circle. Clues outside the grid indicate the sum of digits "sandwiched" between the 1 and 9 in that row or column.