Charles Matthews My first comment here is that the shape relationship between and is never really good.
In this case and have a good relationship.
And also in this case and have a good relationship.
So you could say that Black has created himself a shape problem, by taking 50% from each pattern.
In this case:
HolIgor: We have a winner. This is what I meant.
Maybe there are still 3-3 invasion problems at a after . Black could try a play like b to keep the corner.
Playing , however, seems to get Black out into the centre in good shape. So it looks like good style to me.
Jan: This was my first idea too, but Charles was quicker (but then, I haven't written a book on shape :-). One thing I wasn't sure about was whether the correct solution really keeps white separated. What happens after the following moves? seems to be able to reach the upper-side group.
Karl Knechtel: I'm not convinced of that. (5-8 are shown to indicate that a counterattack is futile.)
Charles Not in the book, and of course I cheated with a database (I wouldn't enjoy posting comments without some sort of verification). But 'big bulge' is a term from Shape Up!