4-4 point low approach one-space low pincer, attach and crosscut

    Keywords: Joseki

Table of contents Table of diagrams
Crosscut
Black's options
Atari then extend
Atari then extend
Atari then extend
Atari underneath
Atari on the outside
Extend towards the top
Extend towards the left
White also extends to the left
White extends towards the bottom
White plays atari
Tesuji sequence
Black resists
Black resists
Black resists
Reasonable followup
Question
Extend downwards

Starting Position

[Diagram]

Crosscut


This page will discuss black's responses to W1. To see how this position emerged, please visit 4-4 point low approach one-space low pincer#1.


Options

Here are some options black might consider, please add any analysis you find relevant below

#4 #5 #1 #2 #3 #6
[Diagram]

Black's options


[1]

Option A

[Diagram]

Atari then extend


antic: This variation seems the most plausible for me. After B3, black will either atari at a or descend at b, depending on how white plays.

[Diagram]

Atari then extend


If white W1, then black must descend at B2.


antic: The question I have is then, does black have to play a, or can he descend at b in sente?

[Diagram]

Atari then extend


If white W1, then black must capture white+circle with B2.


antic: Does anyone think a is better here, instead of B2?


[2]

Option B

[Diagram]

Atari underneath


[3]

Option C

[Diagram]

Atari on the outside

The most common joseki is to play this sequence. Black first forces with two atari's and then plays B5. This threatens to capture at W6, so white defends by playing W6. White can play a first, but when black responds at b, white must play W6 after all. White can play this to create a cutting point though. B7 threatens to capture again, so white must play W8, after which black plays B9 to defend the cutting point.

Since white's corner is more enclosed than it would be if white had origininaly invaded at 3-3, this isn't played much.

Bill: Most common? Joseki? Sez who? Evidence, please.


antic: Yeah, I find these assertions dubious, at best.


eisit: Yes this is not joseki, it's good for black. But the white hane in the beginning was a trick move, so it is normal for black to get a good result if he plays correctly.


[4]

Option D

[Diagram]

Extend towards the top


[5]

Option E

[Diagram]

Extend towards the left

It is very hard for whit to find a good response after B1. There is a good sequence here, but it requires white to find two tesuji. Each of the moves a, b and c looks promising, but the result is sub-optimal. We will discuss these moves before showing the right response.

tderz: I don't know what the right response is , and would also consider White 'd'.

[Diagram]

White also extends to the left

If white also extends to the left, black has the belly attachment tesuji of B3. After B7, white's marked stone is captured and white+circle is cut of. This result is bad for white.

[Diagram]

White extends towards the bottom

B3 is sente, because it threatens to play at a. W4 is insufficient to protect both this weakness and the white+circle stone. After B7, white's stones are captured and white is left with a bad result.

[Diagram]

White plays atari

After W8, black has taken the corner and sente, white white is still without eyes. Black might consider attacking with a or playing along the top side to strengthen black+circle. This depends on the surroundings

[Diagram]

Tesuji sequence

W2 is the tesuji that white is looking for. B3 is the most obvious response, but with the additional belly attachment tesuji at W4, white is safe.

Tapir: This looks impressive, but what happens if black resist at a?

[Diagram]

Black resists

If black resists with B5, white plays W6. Now black can give atari at either of the points marked a, but neither will allow him to live or win the semeai.

[Diagram]

Black resists

After W14, white wins the semeai

[Diagram]

Black resists

Even when black creates an extra required approach move for white with B15 and B17, white still wins the semeai. After B23, w24 will be at white+circle and black is one liberty short

[Diagram]

Reasonable followup

Black can followup like this, cutting of the white+circle stone while yielding the corner to white. a is an important move for either side, and might be played immediately.

[Diagram]

Question

But what about this simple sequence? White can't play atari from any side and black wins the capturing race. -Yuna


[6]

Option F

[Diagram]

Extend downwards


This is a copy of the living page "4-4 point low approach one-space low pincer, attach and crosscut" at Sensei's Library.
(OC) 2012 the Authors, published under the OpenContent License V1.0.
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