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Sodoku is NP-Complete

One of the most famous puzzle today is SoDoku. It is apparently simple but is really hard and categorize as NP-Complete Problem and there are researches that prove it by demonstrating that it is NP and NP-Hard. http://sed.free.fr/complex/sudoku.html http://www.websudoku.com/ http://www.seccperu.org/node/645 […]