Bsleek Fun Lounge: Sudoku - play online, print daily, rules, history, strategies, trivia.

Bsleek Fun Lounge: Sudoku

Sudoku (Japanese: sūdoku), also known as Number Place (sometimes spelled Su Doku, Su-Doku, Sudoko), is a logic-based placement puzzle. The aim of the canonical 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. Although first published in a U. S. puzzle magazine in 1979, Sudoku initially caught on in Japan in 1986 and attained international popularity in 2005. The attraction of the puzzle is that the completion rules are simple, yet the line of reasoning required to reach the completion may be difficult. Sudoku is recommended by some teachers as an exercise in logical reasoning and as a preemptive strike against brain diseases, such as Alzheimer's.

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> > Guide to Sudoku puzzle solving - Scanning techniques
> > Guide to Sudoku puzzle solving - Analyzing techniques
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