The rule is very simple, fill in the blank cells without duplicating the
numbers 1 to 9 in the 9rows, 9columns, and 9blocks, and fill all 81 cells
to complete.
The rule is very simple, fill in the blank cells without duplicating the
numbers 1 to 9 in the 9rows, 9columns, and 9blocks, and fill all 81 cells
to complete.