The aim of the puzzle is to enter a number from 1 through 9 in each cell of a grid,most frequently a 9×9 grid made up of 3×3 "regions", starting with various numbers given in some cells (the "givens").
Each row, column and region must contain only one instance of each number.
The first time you ee the puzzle it seems to be easy, but once you start you realize it is not so easy. Completing the puzzle requires patience and modest logical ability.
First published in the United States, Sudoku initially became popular in Japan in 1986 and attained international popularity in 2005.
As its name tells us, it is a simple version for sudoku because it includes 5 different level, so you can start in novice mode and finish with professional one.
Now you can play SuDoku on your PC, forget pen and paper.