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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":
9 X1 S. F/ k" n1 Q8 V% c& ~$ M- B0 Q! }8 Q* S" a9 _2 w) b; L
8 [* W: \; ~" |/ @* w6 XRegion % W8 \6 Y4 C! M; s" p$ v
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- Sudoku begins with some of the grid cells already filled with numbers:
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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: . w" x" P+ |# @, o0 ^
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1. Number can appear only once on each row: ) K9 f' k, p/ i8 W6 @4 C3 M) r
7 Z3 t; g8 i6 A' y' Y& M6 }7 T, FAllowed 8 @; t0 m; F; e* n4 j
5 |' D3 m' U8 b2 h% u5 D6 x% j
Not allowed
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- i+ _9 N; h& B! P2. Number can appear only once on each column:
]$ G9 q, k, z/ X8 j k6 f& ]
& j2 _8 ?6 g7 f) o9 W) q* `Allowed Not allowed
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! F8 O d6 H9 x' w% S: z/ \3. Number can appear only once on each region:
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; A- q6 T- C3 E1 v% e( R6 SAllowed Not allowed
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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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