Normal sudoku rules apply. Digits along an arrow must sum to the digit in that arrow's circle. Cells containing filled grey circles must contain odd digits. The value of r8c7 is less than that of r8c8.
Normal sudoku rules apply. Digits along an arrow must sum to the digit in that arrow's circle. Cells containing filled grey circles must contain odd digits. The value of r8c7 is less than that of r8c8.