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 Post subject: Middle game suji: out of three point jump with kosumi
Post #1 Posted: Tue Apr 20, 2021 2:52 am 
Dies in gote

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Hi, do you know of any standard sequences after the bottom diagram? (Or a reference?)
Click Here To Show Diagram Code
[go]$$Wc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . O . X . . . . . . . . . |
$$ | . . . . . . O . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]

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 Post subject: Re: Middle game suji: out of three point jump with kosumi
Post #2 Posted: Tue Apr 20, 2021 3:38 am 
Oza

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I put this shape into Kombilo and got 627 references. F16 was the main next move by far, for both sides, but there were actually 20 other continuations, so it's clearly a macroposition-dependent shape.

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 Post subject: Re: Middle game suji: out of three point jump with kosumi
Post #3 Posted: Tue Apr 20, 2021 4:20 am 
Judan

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Well, I'd say the general purpose of the kosumi, over the one-point jump, is to run away whilst keeping black separated as the h18 2nd line attachment now doesn't connect. The one-point jump runs away faster, but black has the 2nd line attachment to connect under or over as an insurance policy. So kosumi is generally used when white wants to run away whilst attacking the now separated black groups, but is a little slower/heavier. It also has a very obvious big followup of f16 so black often plays there or some other move to stop that being powerful, e.g e15 knight move if the cut's not a problem. So continuations depend a lot on surroundings.

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 Post subject: Re: Middle game suji: out of three point jump with kosumi
Post #4 Posted: Tue Apr 20, 2021 4:43 am 
Dies in gote

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Thanks for the comments.
I agree that the conditions depend a lot on the surroundings.
I also searched on waltheri, but there are (too)many sequences to choose from. That is why I asked if there are some standard sequences.
Maybe I can try to first focus on two more specific situations:

a)
Click Here To Show Diagram Code
[go]$$Wc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . O . X . . . . . . . . . |
$$ | . . . . . X O . . . . . . . . . . . . |
$$ | . . . . . O X . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]


b)
Click Here To Show Diagram Code
[go]$$Wc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . X . . . . . . . . . . . |
$$ | . . . . . X . O . X . . . . . . . . . |
$$ | . . . . . X O . . . . . . . . . . . . |
$$ | . . . . . O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]

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 Post subject: Re: Middle game suji: out of three point jump with kosumi
Post #5 Posted: Tue Apr 20, 2021 5:06 am 
Judan

Posts: 6686
Location: Cambridge, UK
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In terms of a standard sequence, this side pattern was super popular for some years, and is in some opening books by Kim Sung Rae iirc.

http://ps.waltheri.net/724591

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