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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":
7 Y9 H. p+ l$ s6 G# d+ X8 T7 m; l$ D) C1 [9 c7 x+ D4 t: T
; s# x8 m2 Z# K! D$ I+ n5 W7 s! f0 FRegion
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+ a/ |7 o6 Z* B2 S* t( {- Sudoku begins with some of the grid cells already filled with numbers: 0 i9 @3 q9 u7 H- G4 _6 a8 |
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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:
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1. Number can appear only once on each row:
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Allowed 1 @1 n; s$ m! J5 R2 G6 b: `
2 p: B z3 c O6 ^ N! Q
Not allowed \8 e/ I7 s# f% j' e5 r
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2. Number can appear only once on each column:
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0 }" Q+ | S- @$ PAllowed Not allowed m$ u4 o1 p& `6 ?* Z
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3. Number can appear only once on each region: 9 g% N) E! \" U" v8 R) M5 T# M. k5 v
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Allowed Not allowed " S5 d1 }5 S2 W. e) d
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0 M5 w( H' [) v m* p" F0 c- 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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