## How To Play

A classic **sudoku puzzle** is made up of a 9-by-9 grid with nine 3-by-3 sub-grids called **boxes**. There
are 9 **rows**, 9 **columns** and 9 **boxes** in every puzzle.

The object of the game is to fill all squares in the grid with the correct number. The rules are:

- Every row, column and box must contain all the digits 1 to 9.
- Each number can only appear once in every row, column or box.

Every puzzle has only one correct solution!