1、Sudoku(数独),Introduction,HistoryVariantsMathematics of SudokuRecent popularity,History,Sudoku variants,Sudoku with additional constraintsArithmetical variants,Mathematics of Sudoku,The combination of sudoku 9! 72 2 27 27,704,267,971 =6,670,903,752,021,072,936,9606.67*1021,Recent popularity,Sudoku app
2、ears 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!,Give you 1 minutes to finish it.,The methods,Intuitive method 1.the on
3、ly method 2.based law rejected 3.the only remaining solution 4. Exclusion method Delete Candidate numbers 1.choose the unique number 2.choose the unique and invisible numble 3.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 method,Lets try it again!,Its a Brainstorming!,There are many competitions about sudoku in the world.,Thank you for watching!,
