Normal sudoku rules apply. The digit in a circle indicates the sum of all digits along the arrow originating in the circle. (Digits can repeat along arrows). A digit in a grey cell is smaller than any digit in an orthogonally-adjacent cell.
Normal sudoku rules apply. The digit in a circle indicates the sum of all digits along the arrow originating in the circle. (Digits can repeat along arrows). A digit in a grey cell is smaller than any digit in an orthogonally-adjacent cell.