3-3 Point Invasion which peeps at the tiger's mouth

    Keywords: MiddleGame, Joseki
[Diagram]

The opening

W5 is usually played to keep sente. Sooner or later White plays W7, which is usually gote but which has a large follow-up.

[Diagram]

The invasion

[1] Black can connect at a or resist? at b.

Charles In a small sample (3) the pro always connects.


Connection

[Diagram]

Connection & block

Black can also cut White off with B4 instead of B3, but then White can live.

[Diagram]

Connection & cut

If the top right is big, Black plays this way. White lives

[Diagram]

Variation

Taking the corner is usually too painful.


Resistance

[Diagram]

Resistance

The question is whether Black can resist.

[Diagram]

Refutation

This way, White wins by one liberty.

[Diagram]

Refutation

W3 would be a mistake I think. White loses a liberty.

Requires more analysis. --Dieter

[Diagram]

Refutation?

iopq: Black wins the semeai? I think I'm missing something...

[Diagram]

Refutation?

[Diagram]

Building up liberties

JoelR: I think if Black tries to increase his liberty count with B1 or a, White can do so more effectively with W2. If instead Black blocks at b, then White W1.

[Diagram]

Refutation

Herman Hiddema: White 2 in the previous diagram does not build liberties. If black plays like this white will never get more than three liberties. If white plays a, black pushes through and gives atari, then jumps again, creating a situation similar to this diagram. So white can only play like this if he can link up with some stones of his own by playing a.

[Diagram]

Crawl OK

Bill: If B1, the crawl at W2 suffices. Black's attempts to smother White with B3 - B9 fail.

tderz: Maybe these are the reasons that/(if) the white clamp b in [1] is safer for black (life or connection) instead of cut-and-capture or connection (W1 in [1])?


This is a copy of the living page "3-3 Point Invasion which peeps at the tiger's mouth" at Sensei's Library.
(OC) 2005 the Authors, published under the OpenContent License V1.0.
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