GokyoShumyoSection3Problem33/Attempts
![[Diagram]](../../diagrams/24/304f0195e2c17cf0f15f7c29d169df5c.png)
white 11 at a, black 12 at b
![[Diagram]](../../diagrams/28/6e942d07be294c214a71bc93b7a60d78.png)
variation: mistake by white
xela: white can capture the corner without ko, but then all the white stones are dead. (Thanks to Skylancer for the correction.)
![[Diagram]](../../diagrams/26/abc90327428bbae22694531e6dcb7175.png)
1 is dangerous
![[Diagram]](../../diagrams/25/c90998a31ddab91a36ab8947f33940a4.png)
Now Ko cannot be prevented