請教我怎樣解這題數獨 - 數獨
By Erin
at 2007-06-02T23:28
at 2007-06-02T23:28
Table of Contents
為什麼是右上方1下方的空格必定是9呢?我發覺我想不起來怎麼找了>_<
但是找到另一個比較快的解...(應該是沒辦法再用找的~只能用比速度找不可能的解)
解說如下:
971624583
2 39851 7
8 173
439517628
827369415
1 248379
79 5 31
18 3
3 2 91
Claim: 左上方最下方列絕對不是4,5
Proof: 若claim成立的話,則為下圖
971624583
2 39851 7
584173
439517628
827369415
1 248379
795 5 31<-矛盾!
618 3
342 91
因此,由Claim的結果,馬上可以確立整個的情形了~(只要試三顆...Orz)
以下就省略了...
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Tags:
數獨
All Comments
By Frederic
at 2007-06-03T22:11
at 2007-06-03T22:11
By Eartha
at 2007-06-08T16:07
at 2007-06-08T16:07
By Kelly
at 2007-06-10T04:30
at 2007-06-10T04:30
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