leads to this seki (one eye each). White gets 1 point by playing at a near the end of the game.
here is a serious mistake. Black may fight the ko or...
![[Diagram]](../../diagrams/51/e8c24273ba57befbbef63cf28c4b6662.png)
Much better for Black
...choose this line. 4 points each and Black' s wall has been strengthened in sente.
![[Diagram]](../../diagrams/26/0b2ef114515a6fc31e8992add5633346.png)
White is alive
allows White to live with 7 points, though the top edge is sealed in sente. White needs another move at "a" near the end of the game.
![[Diagram]](../../diagrams/27/0dad9a51b84916ac4af14cffda276b2a.png)
Mistake by White
This
is a mistake; Black makes a seki in sente.
![[Diagram]](../../diagrams/42/950b2a1eca2ad7b8ff4f7dfa720455e6.png)
White lives with points
If it's White's move,
here turns the corner into 10 points territory.