Sudoku

Description
Welcome to the world of Sudoku, the biggest craze since Rubik's cube. This game looks easy but requires intense concentration, is highly addictive and can be agonizingly frustrating. The deceptive prospect of success will never allow you to give up!!! It is a highly addictive brain-teasing puzzle that can be solved by lateral thinking alone. It conceals mistakes admirably until late on in the game, by which time masochistic instinct prevails and players soldier on. Take heart, this game rewards even those who do not consider themselves natural logicians. There is no mathematics, players just need to think logically and follow instincts. You are invited to embark on a solitary yet inclusive pursuit & tickle your gray cells!!!


Instructions
The player has to fill the grid with numerical digits as per instructions below. The digits to be entered are 1,2,3,4,5,6,7,8,9. This is a row, 9 cells wide. A filled-in row must have one of each digit. That means that each digit appears only once in the row. There are 9 rows in the grid, and the same applies to each of them. This is a box, containing 9 cells in a 3x3 layout. A filled-in box must have one of each digit. That means that each digit appears only once in the box. There are 9 boxes in the grid, and the same applies to each of them. This is a column, 9 cells tall. A filled-in column must have one of each digit. That means that each digit appears only once in the column. There are 9 columns in the grid, and the same applies to each of them.