Sudoku description

Sudoku is designed with 9x9 grid, further divided into 3x3 subgrids called "regions". The objective of the sudoku is to fill empty cells with numbers between 1 and 9, so that number should appear only once on each row, column and region.
-3 levels easy, medium, hard
-With Easy popup input mode.
-If you play Sudoku, you will soon start to see improvements in your concentration and overall brain power.
-Auto Hints.
-Can edit inserted values