數獨卡關求解 - 數獨
By Linda
at 2016-07-02T19:22
at 2016-07-02T19:22
Table of Contents
※ 引述《waterap (呱呱)》之銘言:
http://i.imgur.com/9vFWhvh.jpg
一個合法的數獨有解則必定是唯一解
因此不能含有deadly pattern
4 cells deadly patteern example:
12 . . | 21 . . | . . .
21 . . | 12 . . | . . .
. . . | . . . | . . .
1,2位置可以互換
所以解的時候可以排除這些可能
{1,8,9}那格如果是8 or 9 就是上面的情況
所以可以刪去候選數8,9
刪去後只剩1 所以那一格是1
--
http://i.imgur.com/9vFWhvh.jpg
推 funkie: row3:{8,9} {8,9}; row9:{1,8,9} {8,9} => {1,8,9}->{1} 07/02 17:28
推 funkie: unique rectangle of type 1 07/02 17:35
→ waterap: 抱歉,我不懂這解法,可以麻煩解釋一下嗎?為何{1、8、9 07/02 18:13
→ waterap: }有獨解1? 07/02 18:13
推 LPH66: 這個是唯一解理由, 若那裡不是 1 則這個長方形就是 89 互換 07/02 18:35
→ LPH66: 理論上應該要有別的線索才對 07/02 18:36
一個合法的數獨有解則必定是唯一解
因此不能含有deadly pattern
4 cells deadly patteern example:
12 . . | 21 . . | . . .
21 . . | 12 . . | . . .
. . . | . . . | . . .
1,2位置可以互換
所以解的時候可以排除這些可能
{1,8,9}那格如果是8 or 9 就是上面的情況
所以可以刪去候選數8,9
刪去後只剩1 所以那一格是1
--
Tags:
數獨
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