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1、Sudoku(Sudoku(数独数独) )Introduction History Variants Mathematics of Sudoku Recent popularity HistorySudoku variants Sudoku with additional constraints Arithmetical variantsMathematics of Sudoku The combination of sudoku9! 72 2 27 27,704,267,971=6,670,903,752,021,072,936,960 6.67*1021 Recent popularity
2、 Sudoku appears The Times on 12 November 2004. First live TV Sudoku show, Sudoku Live, on 1 July 2005 on Sky One. In 2006, a Sudoku website published Recent years,Sudoku software is very popular on PCs, websites, and mobile phones. Lets try!Lets try!Give you 1 minutes to finish it.The methods Intuit
3、ive method1.the only method2.based law rejected3.the only remaining solution4. Exclusion method Delete Candidate numbers1.choose the unique number2.choose the unique and invisible numble3.delete the numbers of the candidate area The single position technique scanning regions A cell must be assigned a certain digit EXAMPLE Delete Candidate numbers Choose the numbers, until there is only unique number in a space. For example, we found the number in C6.Another methodLets try it again!Its a Brainstorming!There are many competitions about sudoku in the world.
