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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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Region
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$ a" e& e' F# }$ @; z0 W; U- Sudoku begins with some of the grid cells already filled with numbers: 3 N9 h/ }3 J* C/ z
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3 l- d$ E) n7 u/ y9 `! V1 l- 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: : @2 h! ^5 N! T/ {3 B/ i
( t$ v0 V$ o% A& v$ M1. Number can appear only once on each row: - C: Y$ J0 q8 M2 z2 n! f
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Allowed ' {! ?9 E& ?' g& x% ?7 y
6 o9 M5 Y& m' n1 [( ]) bNot allowed 7 K: ~. W5 w8 K
6 w) G; X, f4 D. h& A1 D$ a2. Number can appear only once on each column: / @& l9 v: |- w* {$ C. ?5 G4 H
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Allowed Not allowed
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- y2 F8 U1 Q" ?. y% U, k8 g3. Number can appear only once on each region: : s. ?0 R, V" l' L% x0 R
% j( q8 l. i A& ]: f6 HAllowed Not allowed 1 M9 n5 s" `1 i: Y+ [6 j5 ~
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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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