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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": 6 h6 F: d! M* g5 u, r, w8 `; S' C2 K
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Region
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: U/ |3 b2 ^ Y- B k; c2 C( p" G- Sudoku begins with some of the grid cells already filled with numbers: 4 `) S& W" L3 {$ S. S; i; }
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- 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: : h5 x8 h$ I5 y$ ?' |% K
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1. Number can appear only once on each row: 4 t2 p7 C, \ h* v- B4 N
' N4 T+ a- @. r5 i$ |Allowed * G1 ~% c! e7 G# \
6 f8 r8 }' l' I1 \Not allowed 7 R, e0 x. s( R2 @; L
( V7 j6 \( S* N2. Number can appear only once on each column:
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Allowed Not allowed 4 H X e2 H9 P0 _) S7 b
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3. Number can appear only once on each region:
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/ k; S: C# [6 r0 j) m% rAllowed Not allowed
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# W7 c5 a# u: r1 d/ c6 u. k- 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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