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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": 3 N9 J y* s; _; Q
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5 B4 x/ {; x% s6 Q) e( kRegion & ]; }+ i) I9 v- y3 C2 W a
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- Sudoku begins with some of the grid cells already filled with numbers: & l8 W, N& b4 {0 E" m& k
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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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/ @6 S) U( g6 G6 BAllowed 9 `) q1 }2 F- T3 S8 L# B. ~* }. Y* ~
6 z8 @/ X" F% o, C cNot allowed
* C8 Q' B u1 L. q3 H* @* T o/ n" h, R2 e
2. Number can appear only once on each column:
, S: i! Z) s9 `2 s8 o
) S. B) A; u. [Allowed Not allowed - E/ X' p& i0 q' d7 {) o( O% v
4 ?/ r5 M0 N: H- V$ K+ Z: W
[8 }1 u0 A; P0 n3. Number can appear only once on each region: Q; Q0 U0 t D$ M: N2 o
2 R3 {* i$ q, f4 YAllowed Not allowed 9 n' E1 m% P! Y: `" h& r1 I8 f
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& i# E6 R3 k' k% p- U5 }* `- 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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