How to Play
The goal of Sudoku is to fill in a 9×9 grid with numbers so that in each column, row and 3×3 sub-section you have the numbers between 1 and 9. At the start of the game, the 9×9 grid will have some squares filled in. You need to deduce the missing digits and complete the grid by using the following rules:
- Every row must contain the digits 1 to 9 exactly once
- Every column must contain the digits 1 to 9 exactly once
- Every 3×3 sub-square must contain the digits 1 to 9 exactly once
