Joseki-related life-and-death example 10

   

Maybe this should be called anti Joseki-related life-and-death example... However:

[Diagram]

corner

What is the best, black can do here

[Diagram]

fist try (Klaus): seki

B1 is surely sente, but the seki is got for black (and white captured one stone). So If this is the best shot, we might count the white corner as (6+1):2= 3.5 points, right?

unkx80: How is B5 at B7?


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