[Welcome to Sensei's Library!]

StartingPoints
ReferenceSection
About


Referenced by
ShapeProblem4

 

Shape Problem 4 discussion
  Difficulty: Advanced   Keywords: Shape, Problem

[Diagram]
Black needs to correct this shape

Charles Matthews My first comment here is that the shape relationship between BC and BS is never really good.


[Diagram]
Abstract pattern (1)

In this case BC and BS have a good relationship.


[Diagram]
Abstract pattern (2)

And also in this case BC and BS 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:

[Diagram]
The 'big bulge'

I recommend on general grounds this 'big bulge' shape made of two keima.



HolIgor: We have a winner. This is what I meant.

[Diagram]
White cannot lean

A play at 'a' becomes impossible.


[Diagram]
Corner aji

Maybe there are still 3-3 invasion problems at a after BC. Black could try a play like b to keep the corner.



Playing BC, 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[1] (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? W3 seems to be able to reach the upper-side group.

[Diagram]
White trying to connect

[1]

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!



This is a copy of the living page "Shape Problem 4 discussion" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.