SUDOKU Instructions
The rules of SUDOKU are simple. The problem consists of 9 rows and 9 columns.
Rule 1: Only the numbers 1 to 9 can be userd in any cell.
Rule 2: Each row must contain all the numbers from 1 to 9, no number can be repeated
Rule 3: Each column must contain all the numbers from 1 to 9, no number can be repeated
Rule 4: Each non-overlapping block of 3 cells by 3 cells must contain all the numbers from 1 to 9, no number can be repeated