Tsumego From Games 33/ Attempts

Black Throw-in  

Hikaru79: I think that the Black throw-in at kills the group, although not unconditionally. White has a couple of choices.

White connects  

If white decides to connect, it's immediate game over.

White connects  

If white resists with , it becomes a ko for life as far as I can see...

Seki or throw in ko  

Bill: After the first diagram, White can play . At this point either player can make seki or throw in to make a ko (which the opponent takes first).

Unfavorable ko  

takes ko.

Bill: If takes the ko, White has as a local ko threat. This is bad for Black.