RTG Problem 51 / Solution
Solution
![[Diagram]](../../diagrams/0/ea6470bfcf0e6a90fe3a56a39aecbf18.png)
Throw-in
White starts by throwing in a stone at
. Black has no choice but to capture.
![[Diagram]](../../diagrams/19/043db5eee5fd1f55779b890fc792de96.png)
Throw-in again
With
white plays another throw-in, again forcing black to capture.
![[Diagram]](../../diagrams/52/842df2cb15f153c2bec2f25525cbcd8c.png)
Ko
After
, it is an approach ko, with white taking first.
Note that Black no longer threatens to kill, she only threatens to make a direct ko, so the local temperature has dropped.
Failure
![[Diagram]](../../diagrams/46/2f0da7973f4837061f5b3b767028923c.png)
Failure
If white does not play the throw-ins first, but give atari on the ouside, she will be short of liberties after
and unable to approach.
![[Diagram]](../../diagrams/32/57701eca9eb335224def575ed699623d.png)
Failure
does not work either, as
can prevent white from capturing the three Black stones. (Actually, in this problem,
can also choose to play at a and allow White to capture the three Black stones, as Black gets only one eye this way.)