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What is Sudoku?
Sudoku is a logic based number placement puzzle. Sodoku is apparently an infectious disease transmitted by animals. So it is likely best to not get the two confused.
In Sudoku, you are presented with a 9x9 grid of cells. This larger grid is sub divided further into nine 3x3 'sub-grids'. Several cells will contain a digit from 1 to 9, while most of the cells will be blank. Your goal is to fill in the blank cells with a digit from 1 to 9 such that each column, each row and each of the nine 3x3 sub-grids contain the digits 1 thru 9 ONLY ONCE.
Need some further instructions? Head on over to How To Play Sudoku.
Want to give your brain a workout, without even realizing it? No, not by studying, doing homework, or reading a dry textbook. Do it the fun way - play a video game. Try one of the downloadable puzzle games at Thinking Is Fun. Lots of variety, lots of fun and lots of headscratching.
http://www.thinkingisfun.com/