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 9Γ9 grid with digits so that each column, row, and 3Γ3 section contain the numbers between 1 to 9. At the beginning of the game, the 9Γ9 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.