Introduction :
Sudoku is a logic game which can be played by all agers. It increases the mental ability and concentration power. the rules may be simple to solve a sudoku but it may take time to master the art of solving a sudoku.

What is a Sudoku :
Sudoku is a logic based number placement game.

Origin :
Though the information is not authenticated, it may show some flash light on the origin of Sudoko. Nikoli introduced this modern day sudoku in Japan in the magazine monthly nokolist in the year 1984. From then on it has spread far and wide, the growth of internet has boosted web sudoku online to a great extent.

Championships and winners :
First World Sudoku Championship 2006 in Lucca, Italy, winner 31 year old Jana Tylova from Rep Cech.
Second World Sudoku Championship 2007 in Prague, winner Thomas Snyder from USA
Third World Sudoku Championship 2008 in Goa, India, winner Thomas Snyder from USA
Fourth World Sudoku Championship 2009 in Slovakia, winner Jan Mrozowski of Poland

Rules for playing Sudoku :
It is a number puzzle which has a 9 x 9 grid which in turn has 3x3 sub grids called regions. Few values are already provided and the target is to fill the empty cells with Numeral 1 through 9. It must be placed in the grid in such a way that each row or column or regions contains these digits 1 thru 9 only once.