Sudoku

数独是所有时代最流行的益智游戏之一。

Sudoku is a free puzzle game that everyone can play. It is the most popular japanese puzzle game. The goal of Sudoku is to fill in a 9×9 grid with digits so that each column, row, and 3×3 section contain the numbers between 1 to 9. At the beginning of the game, the 9×9 grid will have some of the squares filled in. Sudoku is also called number place. There is three levels easy, medium and hard. So play which you want.