BQM 543

Pincer?  

This is a good idea as far as kiai goes, but I don't know how to refute this continuation as black.

Refutation?  

the shimari feels to cramped and b1 feels useless. at A I also see. Any ideas?

Andy: I would reverse the order of and , but this looks fine for black. I would call clearly premature.

Dieter: should be at , should be at too, I think.

Refutation?  

White reduces but stays weak, while Black gets territory.

Refutation?  

An alternative is -, but to my feeling this is easy on White

This lower right pattern is discussed in some detail in BQM274

With in place, looks interesting.  

Tapir: I believe the idea to look for a clear "refutation" is generally unhealthy. See being obsessed with punishing. is a common answer after , but previously exchanging for now looks pretty bad.