4-4 point low approach attach-block joseki

  Difficulty: Intermediate   Keywords: Joseki
[Diagram]
Attach-block  

After exchanging W1 for B2, White is left with two cutting points. Common ways to handle this situation are a emphasising outside influence and b emphasising side territory. c is seen when White is already strong along the side to build a framework.

[Diagram]
Attach-block joseki a  

White has outside influence, Black considerable territory. Black can aim at a later to start an endgame ko, i.e. White can't expect to make much territory along the edge.

[Diagram]
Attach-block joseki b  

B8 may be played at a. With B6 Black can push once more at W7, keeping White low on the upper side.

[Diagram]
Follow-up  

After W1 Black can only defend at B2 and can't block at a. If Black blocks, White can play at B2 itself, taking the corner one way or another.

[Diagram]
Attach-block joseki c  

When White is strong on the upper side and does not like to concede a large corner as after a or being kept low as is likely after b W6 is sometimes seen in professional games.


Not playing the atari?

A first interesting point about this joseki concerns W4. Can White omit this play in order to leave a weakness at the 3-3 point in the corner?

[Diagram]
Not playing atari  

That idea is really in the realm of handicap go: playing the atari is undoubtedly the honte. There is an example from a quickplay game Cho Chikun-Kato Masao 1990-09-09, as here. After W1 Black made strong shape with B2, and White invaded at once with W3, making miai of a and b.

In general this would be considered a thin way for White to play.

[Diagram]
Not playing atari in old China  

This Chinese classical joseki frequently occurs in old Chinese games when the marked stone approaches hoshi only after the two stones at the right have been played. Instead of W3, white a black b might be possible. The overall aim here is probably to settle white quickly.


4-4 point low approach attach-block joseki last edited by tapir on May 31, 2012 - 23:06
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