Sudoku means “The number must occur only once”.
In the late 19th century an old version of the number puzzle Sudoku was published in a French newspaper. The puzzle was somewhat altered and a modern version was published in 1979 by an American magazine. In 1984 Sudoku was introduced in Japan and short after the name was abbreviated to Sudoku. When it became possible to develop the game quickly with the help from computers programs the Sudoku grew fast in popularity. In 2004 the British magazine “The Times” published Sudoku which got an enormous media attention and today Sudoku has become very popular in many countries throughout the world.
How to play Sudoku:
Your initial game board provides a partially completed grid with numbers that cannot be changed. Your goal is to enter digits (1-9) in the blank spaces within the game board, containing a 9×9 grid. The numbers 1 through 9 shall only occur one time in each row, column and each of the nine 3×3 boxes. Every Sudoku puzzle has only one correct solution.
In 2006 the first World Sudoku Championship was held and it took place in Italy and the year after it was held in Czech Republic. In 2008 the world championship was arranged in India and in 2009 it will be held in Slovakia.