Sudoku is a very interesting and absorbing game and is played internationally by players of all age groups. You can select the difficulty level from four difficulty level (Easy, Moderate, Difficult and Expert) as per your expertise.
The Sudoku grid contains 9 rows, 9 columns and 9 ( 3 x 3 ) rectangles/square each containg 9 cells. The grid contains a total of 81 cells.
At the start of the game some cell are pre-filled. A player has to fill blank cells ensuring that 9 cells in each horizontal row, vertical column and ( 3 x 3 ) rectangle/square has all digits from 1 to 9.
No digit can be repeated or missed in any row, column or ( 3 x 3 ) rectangle/square.