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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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& w9 M& O2 w* Y5 c$ T0 CRegion
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& M$ a6 r6 y/ S" B; t9 R/ T- Sudoku begins with some of the grid cells already filled with numbers:
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! i; d3 Y R3 w% v/ l: G- 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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4 ~# t2 W3 q8 L& A, I0 ~3 c6 @1. Number can appear only once on each row: 8 ~6 N, l. m$ e8 I
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Allowed 0 ^# l, P n" n) C- M8 J: k! M4 U
$ q1 G6 D2 J* d6 S* ~Not allowed 3 \" h- P, f0 j s; W/ X
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2. Number can appear only once on each column:
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Allowed Not allowed
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3. Number can appear only once on each region: ' {% L& H9 U, v& N1 V# m0 y
4 c$ |7 i0 [3 Z7 G* h, z$ U. S6 Q& NAllowed Not allowed
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`0 [6 p2 r! e- 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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