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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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+ o! h0 M; @) `$ e, y# L: q+ RRegion " b- @# c5 A0 A0 G
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1 p1 s; \( C. L- 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:
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' [" C+ N# g0 z2 ?+ o* T; V1. Number can appear only once on each row: % O9 Q: a& A% S& A" A$ c0 K/ |
8 o! D2 t _( h! ^3 {6 hAllowed . [0 q" Z9 j1 k% L1 z0 @
$ h" [( v. {. j, l
Not allowed
5 f! _. o3 b1 ^5 {0 J0 R. ]3 n8 O+ C* l5 {8 P9 I/ ^2 ?6 d
2. Number can appear only once on each column: - g5 g" O. Y+ m5 H
& E7 \4 ]6 u2 f
Allowed Not allowed 2 B* v( ~# K0 Q
6 l8 i9 a" w. c
! Y0 ?. t) X7 S# V7 n# P4 \- {3. Number can appear only once on each region:
- M0 W+ ]& v! n1 R
5 E/ E0 S. b0 z) hAllowed Not allowed 9 @: P5 g9 ~+ B8 K( ^
2 m6 h, J8 j3 {2 o
3 P! U# M! s7 O# ^6 M$ R5 W# h- 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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