KyuExercise128/Attempts

I assume that the marked move is the best starting point for Black in the left. The obvious meets with , after which there is miai to live

Left corner, most obvious idea  

If white just push in, I don't see any tricks, which is not to say that there aren't any

Left corner, pushing in  

Let's consider this throw-in  

It seems a and b are the strongest responses.

W answers b  

After 5 it must be a ko. 2 at 4 is similar. I think this is the best b can get in this corner.

B can live in the left corner  

W must answer 1 with 2, then if W crawls with a and b, B makes an eye with c and d