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Invading deep enough
Difficulty: Intermediate
Keywords: MiddleGame
suggested WikiMasterEdit at How to invade Klaus: Actually, this page should be called Don't invade too deeply? with regard to Andre Engels' and Charles' comments below. Thanks for your help!
In a nine-stone handicap game, I (Klaus) was able to attack a 4473 enclosure with an ikken tobi and faced with the question, how to invade.
The game sequence was clearly a failure for White, who failed to create any serious trouble.
Andre Engels: Does not look like a bad sequence for White. And after seeing the complete game diagram (with the black stone being strong) I would go so far as calling it a failure for Black. White started out with a group of weak stones, which are now living with territory. If that's a failure, I would like to see your definition of success.
Charles: I tend to agree with Andre. Now
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Klaus: Well, I thought it was a success too, but after having seen Takagawa's deep invasion (diagram below) I was not sure anymore. It is nice to hear, that my thoughts during the game where OK.
I still tend to overlook moves like
But in this situation, there is no territory to start with!
Sebastian: Interesting! I would have played like you, because I would have been concerned about eye shape for the white group. But I tried some variations, and they all seem to be good for White:
Klaus: I added two more diagrams. The first one seems to be nice for White, but the second one needs further exploration. (Maybe
Floris: Black will usually answer Klaus: I guess Black will not answer like that! You named the reason yourself. The second diagram (game sequence) is good enough for Black, who does not have to improve on that.
Coming in directly with
As Sebastian stated, the given continuations (1)-(3) seem to be better for White than letting Black settle stones easily as in the "game sequence". The initial In a German book (Band 16 der Schriftreihe des Deutschen Go-Bundes), Takagawa Kaku presents the following position in a chapter about "How to answer a boshi":
He mentions, that
Jesse: After
Klaus: If Black moves out to the other side,
kokiri: By coincidence, I was looking at a very similar problem in a book (Pro common sense that even amateurs can acquire) which recommended For reference:
Black was quite strong in the top right, but White had a large settled group on the top side.
Andre Engels: One of the proposals was
Klaus: Well, as I said, "Last idea (4)" is to be further investigated, and
If White desperately wants to take sente (and White is likely to do so because of the handicap) White might leave the position like that. It is not better than the game continuation though and I would feel more confortable with another stone at a.
Klaus: After the discussion above and the especially disturbing "so what now?" diagram by Andre Engels, I am not sure anymore, how to follow up Takagawa's
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Many sequences have to be considered here. Black may start with This is a copy of the living page "Invading deep enough" at Sensei's Library. ![]() |