4-5 point, 3-3 invasion, attach

    Keywords: Joseki

Table of contents Table of diagrams
The clamp
Best
Cutting the other side
Not good
Playable if ladder
Revert
Hane
Hane 2
Calm
Fight
Fight and squeeze

The Clamp

[Diagram]

The clamp

B1 is not a recommended move because iof the clamp at W2. Next, Black should play a, b being a mistake.

[Diagram]

Best

A classical case of cut the side you don't want and capture the cutting stone. This variation depends on a ladder. If it works it is usually the better choice.

[Diagram]

Cutting the other side

Black may favor the corner, especially if the ladder in the previous diagram doesn't work, but usually this is better for White. W8 can be omitted to play elsewhere.

[Diagram]

Not good

If black does play at B1, then W2. If Black cuts on the outside, this result follows which is good for White.

[Diagram]

Playable if ladder

However, if the ladder doesn't work for White, the inside atari is playable.



Revert

[Diagram]

Revert

This reverts to the 4-4 point, 3-3 invasion and is not White's best option, which shows that B1 was not Black's best option.



Hane

[Diagram]

Hane

W2 is lukewarm. Black can turn and take sente

[Diagram]

Hane 2

This way White can take sente but Black's thickness is superior. White is low.



Wedge

[Diagram]

Calm

[Diagram]

Fight

[Diagram]

Fight and squeeze

W9 at B2. W11 at a.


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