[Welcome to Sensei's Library!]

StartingPoints
ReferenceSection
About


Referenced by
Kosumi
34PointLowApproach
DashnStyle
DiagonalPlayRefer...

 

diagonal plays as non-standard
  Difficulty: Advanced   Keywords: Joseki, Shape

Consider this play (which isn't standard joseki).

[Diagram]
White tries for shape

After the close pincer BC, W1 is played in cases when Black is strong locally - it's not a normal joseki. Black next at a or b: if Black at b, White in these circumstances will be happy to play at a.


[Diagram]
Kato-Cho U



This is from recent days (Kato Masao-Cho U (B) 2003-05-26) in game 2 of the Honinbo match. Black's formation is a Kobayashi variant, considering the position of BS. Playing W1 is therefore not the most obvious idea, and B2 is severe.

Probably White reasoned this way: in the actual Kobayashi formation Black can react to a later invasion by White at a by invading at the 3-3 point in the right corner (as we are looking at it). In this case Black is a little heavier. Therefore White can spend time up to W7 building up in the centre.

[Diagram]
White tries for shape (2)

[Diagram]
White tries for shape (3)

These other variations on the theme are in the same state: they are not joseki in their own right, and can't be called good shape. But they are sometimes used for particular reasons.

Charles Matthews



This is a copy of the living page "diagonal plays as non-standard" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.