Black loses the marked stones because Black connect at a is met by White b. at c is met by White d, resulting in a big ko.
Sub-pages (up)Attempts
at c is met by White d, resulting in a big ko.
![[Welcome to Sensei's Library!]](images/stone-hello.png "Sensei's Library")
![[Diagram]](diagrams/48/71b86880cca470bfe9a5a44c01d2ab93.png)