Number Place Free（Sudoku)

This Sudoku Free is the best puzzle game!
Will surely satisfy all the Sudoku players from the beginners to the experts!

6 difficulty levels from very beginners to the expert.
More than 10000 puzzles are waiting for you!

Sudoku is played over a 9x9 grid, divided to 3x3 sub grids.
Sudoku begins with some of the grid cells already filled with numbers.
The object of Sudoku is to fill the other empty cells with numbers between 1 and 9.
Number can appear only once on each row, and number can appear only once on each column.
Also,number can appear only once on each 3x3 sub grids.
The difficulty can be selected by three stages.