Do you Sudoku ?

This blog is for those who haven't heard about sudoku!
Its a wonderful game, just like solving crossword puzzle. Except its all numbers. If you are intrigued by numbers.. then its not for you (or it can be for you, to overcome the fear!)

The game goes like this.. You will be given a 9x9 rows/columns with random numbers already filled in. The no. of numbers filled in makes it easy/difficult. The more the numbers are filled in already, the easier it will be to solve.
The rule is you have to fill in the remaining empty boxes with numbers.
At any point each 3x3 row should have all the numbers from 1 to 9 (no repetition) [There will be 9 3x3 boxes in the puzzle)
Each horizontal 1x9 row should have all the numbers 1 to 9 (no repetition)
Each vertical 9x1 column should have all the numbers 1 to 9 (no repetition)

Let me give an ex. in the below row of x,y,z,a,b,c's....
x x x y y y z z z
x x x y y y z z z
x x x y y y z z z
a a a b b b c c c
a a a b b b c c c
a a a b b b c c c
x x x y y y z z z
x x x y y y z z z
x x x y y y z z z
Each Vertical column (x x x a a a x x x, y y y b b b y y y, ....) should have all the numbers from 1 to 9
Each Horizontal column (x x x y y y z z z, a a a b b b c c c, ...) should have all the number from 1 to 9
Each 3x3 rows/colums (xxx,xxx,xxx or yyy,yyy,yyy or ....) should have all the number from 1 to 9
Thats it. Just google "sudoku" online.. take any of the daily newspaper.. (Here or in India) They have a column for sudoku puzzles nowadays.
If you are flying for couple of hours and not in the mood for reading or travelling alone.. try sudoku. Couple of hours will vanish just like minutes.. Even the airline magazines have the sudoku puzzle in them (Ive seen in Southwest airlines)
Let me warn you.. its quite addictive.
Try one and let me know, if you like it or not!