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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": 1 l3 y) b5 T* i! u
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Region . {4 s( w! p' Q6 x8 k' b+ M
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- Sudoku begins with some of the grid cells already filled with numbers: & ~8 v3 [7 B$ G1 R: k
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" D& u9 [% Y! K; ?) H) }+ c7 x) Z- 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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) \1 Z6 O ]' i5 h) k/ oAllowed
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8 h; h4 n9 g# F" p( q q. _6 U8 ?( d {Not allowed
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2. Number can appear only once on each column: 5 S4 B. m9 m _7 \
! Y+ J8 N9 i$ ?' O5 q' X2 Y1 VAllowed Not allowed
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3 t6 ]# T; h' I/ ~& @1 Q& l- X0 w3. Number can appear only once on each region:
# J3 p6 ^5 u1 \$ D4 V5 X0 H! A1 r+ {! L% U
Allowed Not allowed
/ k; `' `1 p+ ?& G) d9 | , X% l! H9 o' U3 r2 p" Z
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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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