Exactly six digits from 1-9 must be placed once each in every row, column and box. The solver must determine which six digits to use. Digits along an arrow must sum to the digit in that arrow's circle.
Exactly six digits from 1-9 must be placed once each in every row, column and box. The solver must determine which six digits to use. Digits along an arrow must sum to the digit in that arrow's circle.