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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":
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Region
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- Sudoku begins with some of the grid cells already filled with numbers:
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& e- f: Z" x' Y x " X! E" \$ d" r; H
7 Q( k% ^" X; Q* P1 B* n' |- 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: " f/ Q* W' x! N0 f: r
) x6 x4 `& G2 j- {1. Number can appear only once on each row:
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4 l' l) O& [+ kAllowed
: L1 O& n$ C8 h2 y
2 u/ F7 j0 |$ g7 q @- X2 JNot allowed
$ }6 B$ ]0 d1 v! e6 J+ x. |5 Y+ w# G1 m& F5 D# w2 m1 a
2. Number can appear only once on each column:
s: w; ], Z. {* m4 W
9 K8 s5 @8 Q& p; _Allowed Not allowed 6 p2 l' E& B! v- p$ ` C
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3. Number can appear only once on each region: 4 y1 Z% L) @! ^5 w, G( a
$ a Q/ @* y, {( w% B+ c1 m' E7 @
Allowed Not allowed ; y& Q3 h2 q& @0 M
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- 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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