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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":
6 D O8 O5 E; B2 W: K; P7 B7 Y
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Region 8 \( j# P+ L% b" C" K: \, E
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: d" R2 n* `" Z3 ~% T& C# _% {' U" I- Sudoku begins with some of the grid cells already filled with numbers: ! V" I2 c0 Q$ [* J$ [1 Z# k5 [
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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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e+ i" L6 B" Z: ~+ S7 r7 v2 B% S4 g1. Number can appear only once on each row:
+ W: o. }; K2 {- d @2 _
4 V9 W; x9 n# W L; [Allowed : Q( o$ \3 c4 i9 Y3 s$ ?
; y. H4 \/ ]5 z# L. c0 q
Not allowed + o. I; ^& u# [) i7 P4 H' f7 I, ?
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2. Number can appear only once on each column:
: e. f4 A! A% [5 y: Z0 G8 g9 F" z
6 F7 x/ i" D, W2 F+ a( Z' R. FAllowed Not allowed
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$ U4 E) U1 Y6 B5 Q m+ N% U. A* s: A0 E; _0 a
3. Number can appear only once on each region:
% T! a/ E: k$ k0 J/ f0 P% ]) {/ ^0 k
Allowed Not allowed & E, ]+ A p8 H. C
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2 H+ c8 ~% G5 U4 R* e/ p# b: ]1 |- 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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