level 5
然后接着就可以到下一步。
level 14
level 14
XYZ-Wing
The three cells I1, G1 and I9 form an XYZ-Wing pattern on the value 7. Regardless of the correct value of the cell I1 (7, 2 or 5), either the cell I1 contains the value 7, or one of the two cells G1 or I9 will have the value 7 as its only remaining possible value. It follows that one of the three cells I1, G1 or I9 must contain the value 7.
Other occurances of the value 7 can therefore be removed from any cells sharing a row, column or block with all the three cells.
2013年06月07日 14点06分
4
The three cells I1, G1 and I9 form an XYZ-Wing pattern on the value 7. Regardless of the correct value of the cell I1 (7, 2 or 5), either the cell I1 contains the value 7, or one of the two cells G1 or I9 will have the value 7 as its only remaining possible value. It follows that one of the three cells I1, G1 or I9 must contain the value 7.
Other occurances of the value 7 can therefore be removed from any cells sharing a row, column or block with all the three cells.
level 13
level 14
个人感觉这个可以看作显性数组理解，不对还请高手勿喷
2013年06月07日 15点06分
6
![[勉强]](/static/emoticons/u52c9u5f3a.png)