The absence of is convenient.
Reuven: is a good move but this isn't the most interesting ressitance - With
in place, after it, B would still have a ko and would be nice to show why that line fails here.
Dieter: Well, it fails here, doesn't it?
Reuven: Yes but how? (Remember, just ko isn't good enough) Dieter: Sorry, I see now that you are talking about Black's resistance.
This is interesting indeed! I don't want to boast, but are these kyu exercises? Reuven: Oh, I can't believe I didn't even consider the (obvious) from your previous diagram, because I solved
this before it! Of course this
is better... :) No idea as for the difficulty (I don't actively play these days so rank has a sort of abstract feel to me), sorry...