sudoko

Sudoku (数独, sūdoku?), also known as Number Place or Nanpure, is a logic-based placement puzzle. The aim of the puzzle is to enter a numerical digit from 1 through 9 in each cell of a 9×9 grid made up of 3×3 subgrids (called "regions"), starting with various digits given in some cells (the "givens"); each row, column, and region must contain only one instance of each numeral. Completing the puzzle requires patience and logical ability.
I, myself uses http://www.soduko-soduko.org/index.php . be warned ,it's addictive and frustrating at it's best!!!

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