4-5 point 3-3 approach

    Keywords: Joseki

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Table of contents Table of diagrams
3-3 approach
Black's diagonal play
Black's knight's move
Black at ''a'' - variation 1
Black at ''a'' - variation 2
Black's move ''b''
Playing for the left side
Dia 1
Dia 2 (a)
Dia 2 (b)
Dia 2 (c)
Dia 2 (d)
Dia 3
Dia 3
Index of sub-pages

#toc2 #toc3 #toc1
[Diagram]
3-3 approach  

White comes in at the 3-3 point in search of a quick way to live.

Black normally answers at a, giving White a choice of direction, or at b to build a wall on the upper side. If Black really has to defend the left side, he may play the otherwise inferior c.

Black's diagonal play

[Diagram]
Black's diagonal play  

White slides one way or the other with W2, and B3 is expected. For B5 Black can make an extension to the vicinity of the circled point on the upper side, or play at the other circled point for influence on the left side.

Black's knight's move

[Diagram]
Black's knight's move  

When B1 is played as here, W2 is normally the contact play shown, and now Black chooses a or b.

[Diagram]
Black at a - variation 1  

In this line a ladder is possible (set up by B5 at p), but a running fight is more common these days, with Black 11 at c. This may support Dieter's thoughts on ladder strategy.

[Diagram]
Black at a - variation 2  

White can also avoid fighting, by playing W4 as the staircase. This is White's plan of preference when Black has a stone already in place on the left side.

See discussion at 4-5 10-3 enclosure, and comments below.

Naive kyu question: what if W4 at B5 when the ladder is bad for black?

[Diagram]
Black's move b  

B2 here can lead to a pushing battle. In this case White has an option of playing at e first, before pushing on at d.

Playing for the left side

[Diagram]
Playing for the left side  

If Black really needs to defend the left side, this sequence is possible, but this no longer seems to be part of pro play.


When to play the 3-3 approach

The 3-3 approach is a good approach globaly speaking when White has a stone along the side such as white+circle in the following diagram (i.e. a 54113 enclosure).

[Diagram]
Dia 1  

The 3-4 approach

Even though the 3-4 approach is feasible, as shown in the following diagrams, Black ends up with a bulky group without any eyeshape which will be quite a burden to take care of. That is, play the 3-3 invasion to avoid becoming heavy.

(Joseki line reference at 4-5 point 4-3 approach keima, contact at 3-5, hanedashi. Charles)

[Diagram]
Dia 2 (a)  
[Diagram]
Dia 2 (b)  
[Diagram]
Dia 2 (c)  
[Diagram]
Dia 2 (d)  

-- Floris Barthel?

Charles: I'd like to comment that this discussion provides two examples of blocked configurations. Firstly, as far as I can see, Black simply never plays now into the 4-3 approach (last example dates from 1772). And consequently the framework with white+circle isn't seen in pro games (last example I've seen is from 1961). Effectively the pros say 'white+circle is a hamete, and the 3-3 approach a refutation'.

Floris: Yes, the white+circle stone isn't in a very good position, and when Black does then invade at 3-3 as shown, you can see the stone is in a very inefficient position.

[Diagram]
Dia 3  



Bill: Yeah, like White is really going to play W2 here.

Dieter: I guess that, if the pros regard white+circle as a trick play, this sequence is one of the diagrams proving the refutation. Not the refutation, maybe, but not entirely irrelevant either, I suppose.

[Diagram]
Dia 3  

I guess Bill, that your point is that this diagram should be researched, rather than the previous. Indeed, it is not so obvious for me why this result would be inferior for Black. It looks rather consistent. I think no amateur would be scolded for playing like this.


4-5 point 3-3 approach last edited by PJTraill on July 11, 2018 - 02:21
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