What is SUDOKU?

Sudoku (English pronunciation: soo-DOH-koo) is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which typically has a unique solution.
- wikipedia

How to Play SUDOKU?

1) Click on the number to select the number that you want to input.

2) Click on the box that you want to input the number in.