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群组: 数学建模 群组: 数学趣味、游戏、IQ等 群组: 趣味数学 群组: 加油数模,加油美国赛。 群组: 南京邮电大学数模协会 |
Sudoku is played over a 9x9 grid, divided to 3x3 sub grids called "regions": * h4 f' C# f9 i- G
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2 R5 P+ [% \ X8 q- sRegion
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1 ]7 `& t& \: h G& v# o, f- Sudoku begins with some of the grid cells already filled with numbers:
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# e6 I- E5 ]8 _+ e3 U( G$ \) l- The object of Sudoku is to fill the other empty cells with numbers between 1 and 9 (1 number only in each cell) according the following guidelines: 3 T$ \+ s9 [. [
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1. Number can appear only once on each row: ! Q0 Z4 f* n: ]4 ~! g
e w! f( Z' M( u- sAllowed
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Not allowed
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2. Number can appear only once on each column: . C; q2 f) D4 t/ D5 E+ p
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Allowed Not allowed
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$ Y# N! |( o; v* ]3. Number can appear only once on each region:
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Allowed Not allowed 7 ~: q; R' w3 q% C) `# K
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' O2 m& r6 t c T- X9 |- A summary of these guidelines would be, that a number should appear only once on each row, column and a region. |
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