XuanxuanQijingProblem110/Solution

Black to play  

If White persistently deny Black's life.... ( at and recaptures)

Continued 1  

kills White. Now it's a big capturing race....

Continued 2: ko  

at , connect. Ko is the final answer.

Black to play  

If exists, is good. is a trick.

Black to play  

Another variation. is at 6.