SUDOKU description

You won’t need a Sudoku paper puzzle ever again!
The game is played over a 9x9 grid, divided to 3x3 sub grids called blocks.

The object of this number-placement puzzle is to fill the other empty cells with numbers between 1 and 9 according to those guidelines:

- Each column must contain all of the numbers 1 through 9 and no two numbers in the same column can be the same. (Number can appear only once on each column).

- Each row must contain all of the numbers 1 through 9 and no two numbers in the same row can be the same. (Number can appear only once on each row).

- Each block must contain all of the numbers 1 through 9 and no two numbers in the
same block can be the same. (Number can appear only once on each region or block)

- 3 different difficulties: easy, medium, hard, and expert.

- Hundreds of puzzles for each difficulty to improve your skills.

- Simple and intuitive design.

- The board is easy to read and the numbers input system is simple.

- Auto-save, you can pause and resume at anytime you like.

Enjoy this good time passer.