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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":
) o. `, k: r# w1 K+ O1 p9 _6 K7 B Y! c/ O$ }9 \
* G# F ?: [9 R9 gRegion
& H# j$ n/ C6 s, v
' O C1 }& m- ^: `3 u' I
9 p2 Z- J( z, y, _4 M- Sudoku begins with some of the grid cells already filled with numbers: 1 z; c. b8 C8 P! R/ Z
* s4 d0 U2 e6 o5 Q$ ]" z9 _
, y" L4 t# O: H! O# T" b2 ~4 x6 f* W$ Q, G& b
- 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: 0 `6 \ j3 X' U& U3 d
D" }; x# G$ q4 H( W1. Number can appear only once on each row: ( w' P2 [; \9 W' }; ~
: l( K+ g* L# R9 j' z5 [! OAllowed ' _; c4 r8 `! e# O3 L/ o: ?
+ E4 c( _/ ?. oNot allowed {/ n# u" U9 b( [4 ]2 Y. N
1 X* v8 A- }& g k4 |! W2. Number can appear only once on each column:
4 B: K& y, K* O3 b5 J7 j! H C
& t# x( @' l7 r+ ]* cAllowed Not allowed $ i0 u& i/ {# D7 r, x2 O
5 v3 L1 {! {8 f/ v: u/ n3 ~
) z0 O. r, a: `) _- e5 h4 ?3 v+ _7 x3. Number can appear only once on each region: 9 ^7 l C6 d) W& O
& d: J: F7 ]. V6 Y9 C* d
Allowed Not allowed
) a' ]& w8 _0 I; m+ m ; v5 m- b/ {) P) R, h8 E
7 ]! F) Z4 R, {* d" Q7 D. t
- 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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