Xuanxuan Qijing Problem 99 / Attempts

Black to play  

Dieter

Herman Hiddema: Looks good. See also the diagrams below.

Black to play  

Herman Hiddema: If white plays like this, black sacrifices 4 stones and then kills with at .

Black to play  

Herman Hiddema: Some people might do the order wrong. The diagram to the left works, as a and b are now miai. However, this is a mistake by white, who should play at to live.