Sudoku doesn't require any special math skills or calculations. It is a simple and fun game of logic -- all that's needed is brains and concentration.

There is really only one rule to Sudoku: Fill in the game board so that the numbers 1 through 9 occur exactly once in each row, column, and 3x3 box. The numbers can appear in any order and diagonals are not considered. Your initial game board will consist of several numbers that are already placed. Those numbers cannot be changed. Your goal is to fill in the empty squares following the simple rule above.

Many of the games available on feature unique twists on Sudoku basics. Experiment with the different Sudoku games and discover these exciting variations!

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