Sudoku, also known Number Place, is the most popular logic based number-placement puzzle in the world.
Sudoku is a brain training activity.
Please relax and work hard every day in the “Relax Sudoku”.
Fill the 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids contains all of the digits from 1 to 9 now!
You can play all for free.