There is a World Sudoku Championship held every year since 2006. It is run by the World Puzzle Federation, and more info can be found in the related links.
there is no real satistics to a sudoku so unluky the are many ways to do a sudoku
Sudoku is a noun.
Lovers of sudoku can visit the BrainBashers website where they can find daily sudoku games. Billions of free sudoku can also be found on Websudoku. This is unlimited and can be played on all devices such as android or Ipad.
Buku Sudoku happened in 2006.
Zen of Sudoku was created in 2006.
Zen of Sudoku happened in 2006.
Sudoku Gridmaster happened in 2006.
Rubik's Sudoku was created in 2006.
There are several places where one can play sudoku online. Some interactive online sudoku websites include Web Sudoku, Sudoku Saviour, and You Play. Sudoku puzzles can also be printed out and completed by hand, and these types of puzzles can also be found on these websites.
Pyramid sudoku is a regular sudoku board with shaded areas. Not only does one need to complete the regular sudoku, but the shaded areas can only have 1-9 as well.
Given the benefits of learning and becoming skillful at Sudoku, I would have to say that there ARE no disadvantages of playing it. However, the process of LEARNING to do well at it can be quite time consuming, as is any newly learned skill. If you could come up with any disagreeable aspect of Sudoku, it would be that it takes so much time to be very good at it.
It doesn't look as if Euler was involved with the invention of Sudoku. http://en.wikipedia.org/wiki/Sudoku#History