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InvasionItinerary

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33PointInvasionJo...

 

3-3 Point Invasion Joseki New Move
Path: InvasionItinerary   · Prev: BlockOnTheWiderSide   · Next: 33PointInvasionWithKeima
    Keywords: Joseki

[Diagram]
Diag.: An interesting option

What is the purpose of Black 1? How should White react?

Alain


[Diagram]
Diag.: Tricked

I guess I've seen this one before. I think he tries to trick White into 2 upon which 3 and 5 shut in her stones and make considerable thickness.


[Diagram]
Diag.: An interesting option

So I think White has to resist with 4.


[Diagram]
Diag.: An interesting option

This is a line of play that comes into my mind. Depends on the ladder at a, but Black can sacrifice the marked stones, can't he ? Fairly complicated ...

Dieter



[Diagram]
Diag.: Sacrifice (1)

Interesting variation, Dieter. I think that if the ladder works for White, this is good enough for her. If Black is going to sacrifice the stones, he'd better not play at 9 in your diagram (the marked spot here), because this stone is going to be worthless once White has captured. It would be better to play at 1 here immediately, or perhaps Black a-White b-Black 1-White 2. Still the result seems good for White.


[Diagram]
Diag.: Not a good idea

But what can White do if the ladder does not work for her? The variation shown by Dieter is clearly bad for her in that case. My first intuition was to play at 2 without the atari at a, leading to this variation. I do however get the impression that this is good for Black: because the three white stones have only two liberties, White b is not sente, and White will have to play one of the circled points to use the aji of these stones.

I do however not see any other good options for White either, so when the ladder works for Black, only the 'Tricked' diagram and this diagram remain for White. Either that, or I missed something.


[Diagram]
Diag.: The only move left

If I have missed something, it seems that White 2 is the only move we haven't discussed yet. Black 3 seems like the natural answer, after which White 4 and 6 follow.


[Diagram]
Diag.: follow-up

This shows the follow-up from the previous diagram. White is locked up in the corner, but the marked stone still has quite some aji. Exchanging White a for Black b would decrease this aji.

-- Andre Engels



[Diagram]
Diag.: An alternative for Black 3

I like Andre's 2 for White. It has the feeling of a true refutation of a trick move. One question is whether Black can resist more strongly with 3 than in the original diagram. Considering only the corner it does not seem possible. However, there may be a problem...


[Diagram]
Diag.: Black strong outside

Remembering that the premise behind the 3-3 invasion is that Black has already played on the outside, can White afford to fight hard here or not? Black a now leaves White without two eyes.


[Diagram]
Diag.: Black fails?

Therefore after Black 5 White turns back to 6. However, after 8 it does not look like Black is going to able to contain White.

--DaveSigaty



[Diagram]
Diag.: A different move

How about White 2? This move aims at the cutting point at a. Black cannot take the white stone on the left.


[Diagram]
Diag.: The strongest path

The "only" continuation would be Black 1, White 2. Black 3 is an attempt to control the white stone on the left as well as defending the cut. White 4 cuts there anyway as this brings the aji of the stone on the left back to life. As I see it - Black is in trouble.


[Diagram]
Diag.: The pro continuation

As found through Jansteen's GoBase. Which means my "new" move isn't a new move after all. Hm... Should I be happy or sad? GoranSiska



dnerra: Be happy, Goran! :) I have another option to discuss:

[Diagram]
Diag.: The simple way

Could this be good enough sometimes? White is more confined than usual, but Black will have to add one more stone to take White 1 off.

(Anyway, Goran's move at a definitely looks more stylish!:)



[Diagram]
Diag.: The difference

A very good suggestion. The value of a sacrifice depends on the wholeboard position. When Black takes the stone, his shape is much stronger (naturally :)). Black a threatens the corner (ko) while White a ends in gote. Therefore Black will most likely get to play a in sente.


[Diagram]
Diag.: The difference 2

In this diagram White 1 or Black 1 are double sente plays and this situatiopn is likely to be played out fairly early. White is left with a as an endgame move since Black a can be ignored. Note that if 3 is one point lower Black a is sente.


[Diagram]
Diag.: Required reading

Depending on outside strength Black may play 1. Because of the strong shape of the black stones White cannot continue with the usual move at a.

It's quite surprising how quickly the whole board considerations come into play.



Path: InvasionItinerary   · Prev: BlockOnTheWiderSide   · Next: 33PointInvasionWithKeima
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