3-4 point high approach one-space low pincer attachment noseki

    Keywords: Joseki

Table of contents Table of diagrams
Noseki
White is tricked
Countertricked
Taking the loss
Best for both
Best for both (ctd)
Best for both (ctd)
Not ideal
Black's best
Forcing?
Forcing?
Keima
Joseki according to Ishida

Starting sequence

[Diagram]
Noseki  

The combination of B2 and B4 is a bit of a trick play.

  • Kim Mansoo in Catching up to dan-level players? says: " "Never appears in pro games. Pretty popular trick play of sort among amateurs though.



Tricked

[Diagram]
White is tricked  

If White plays like this, her influence obtained towards the bottom will only work if she has some stones there herself. Black has sente and can use it to build at a.

Refutation

[Diagram]
Countertricked  

W1 before W3 is correct for White. It is important not to play W3 at a [1].

In this diagram Black gets "countertricked". Also W9 is best to capture directly and not "force" at B instead [2].

[Diagram]
Taking the loss  

After W1-B2-W3 refutes the trick play, Black's best is this sequence. Black can decide to play elsewhere or finish off at A.

[Diagram]
Best for both  

Black should actually atari at B2 first, when White has already refuted the trick play at W1. W5 can be at B6 [3]. Next, W7 is a clamp tesuji.

[Diagram]
Best for both (ctd)  

W7 at B2. B8 is efficient.

[Diagram]
Best for both (ctd)  

Although Black's capture looks fairly large, White is strong at the top side and the loose capture has some (ko) aji plus White has sente.



[1]

[Diagram]
Not ideal  

White has sente and two forcing moves but the original refutation is better. Also ...

[Diagram]
Black's best  

If Black has room to expand on both sides with B5 and B9, White's central stones are floating and the corner is small.



[2]

[Diagram]
Forcing?  

White would like to force W1-B2 before capturing at W3 but Black can resist:

[Diagram]
Forcing?  

Black can thus come back to his original decision and still capture the corner. White gets a strong position on the left side. This is not bad per se but Black can still pull out his stones at A and White is left with no eye.



[3]

[Diagram]
Keima  

W1 can also force this way. Also possible are W3 at A and B4 at B, amounting to similar results.



What Ishida says

Ishida's joseki dictionary, volume 2, gives the following a one diamond (= acceptable joseki) rating:

[Diagram]
Joseki according to Ishida  

According to KataGo, B4 is submissive - see "best of both" diagram above. Also B8 would be slow and it is better to take sente.


3-4 point high approach one-space low pincer attachment noseki last edited by Dieter on February 13, 2024 - 16:55
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