Joseki-related life-and-death example 5
Here's the correct move:
Here is one sequence for white to live unconditionally:
After , a and b are miai for life.
Here's another possibility:
Again White lives.
What if White plays this way?
is bad shape, as ...
Black answers with 4 and, depending on White's response, White dies or, at best, gets a ko. Here are two cases where White dies, followed by the ko case:
If the , exchange has taken place earlier then loses its power and is possible.
What if Black plays this way?
What if Black ataris on the inside instead of playing in the previous diagram?
After White will capture something to make life.
Suppose Black knows all this and plays below to defend in sente?