1

2

3

4

5

6

7

8

9

X

^

A sudoku puzzle has 9 columns, 9 rows and 9 boxes of 3x3 squares. To solve a puzzle, you should fill in the table so that the numbers from 1 to 9 will be in each column, each row and each 3x3 box only once. Every sudoku puzzle can have only one correct solution.