5-5 point josekis

    Keywords: Joseki

Index to pseudo-joseki presented here:

[Diagram]
Responses to stone on 5-5  
  • From professional play:
    • a: pseudo-joseki 1
    • b: pseudo-joseki 2, 3
    • c: pseudo-joseki 4, 5
  • From Josekipedia:
    • d: pseudo-joseki 6, White can choose a peaceful or a fighting variant.

Andre Engels: Not much joseki is known for the 5-5 point, not only because it is played rarely, but also because common wisdom seems to be that a 5-5 point is better left alone than approached in most cases. Here are some variations that have been played by professionals more than once, and thus might be considered proto-joseki.

[Diagram]
pseudo-joseki 1  
[Diagram]
pseudo-joseki 2  
[Diagram]
pseudo-joseki 3 (white 11 at a followed by black b or at c)  
[Diagram]
pseudo-joseki 4 (white 11 at a)  

Actually just once this sequence, but I wanted it in because earlier moves in the sequence have been played more than once.

Shouldn't white 11 be at "b"? ~srn347

[Diagram]
pseudo-joseki 5  


Chris Barnes, 2kyu? Back in the '90s, there was a rec.games.go newsgroup discussion that recommended a 3-3 invasion under the 5-5 stone. Has this move been seen in professional play?

  • Patrick Traill: I do not know about professional play, butJosekipedia as of 2018-03-06 gives this, with a peaceful variant at a and a fighting variant at b as below. The comment on 3-3 is "Usually this invasion point is the best, because it makes Miai of the extensions W3 and x (6-3 points)." attributed to Alexandre Dinerchtein(3p - Korean-Style Insei League 13.11.2010).
[Diagram]
pseudo-joseki 6 3-3 invasion  
[Diagram]
pseudo-joseki 6a 3-3 invasion, peaceful variant  
[Diagram]
pseudo-joseki 6b 3-3 invasion, fighting variant  

AI analysis

[Diagram]
AI  

Analyzing a whole board, where all other corners have the star point occupied in a diagonal fuseki, LeelaZero prefers entering at one of the 3-4 points then Black will play elswhere? after W3.

[Diagram]
AI  

When Black kicks at B2, this is one local pattern.

[Diagram]
AI  

Black can also surround at B4. After W5 Black makes good influence.

[Diagram]
AI  

In this variation, White can cut at b.


5-5 point josekis last edited by Dieter on April 7, 2020 - 17:59
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