Joseki question

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dedroid
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Joseki question

Post by dedroid »

hello, i was playing a game and this move came up and i can't find reference for it anywhere, so i was hoping i could get some help here.



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



so far i've thought about these two moves

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


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


but i don't really know where to go from here
mw42
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Re: Joseki question

Post by mw42 »

Click Here To Show Diagram Code
[go]$$
$$ ----------------
$$ | . . . . . . . .
$$ | . . X . . . . .
$$ | . . Q O . . . .
$$ | . . . , . . . .
$$ | . . . X . . . .
$$ | . . . . . . . .
$$ | . . . . . . . .[/go]

I'd play this move and be satisfied. Black's approach stone seems awkward now and if he wants to live on top he has to crawl. Separating seems important, but

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

This move is immediately bad shape for white, and it leaves black with (a) which threatens to connect and helps his shape on the side.

This move is almost definitely not joseki, it reeks of a trick play to me so maybe someone more educated in those matters can be more helpful.
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Shaddy
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Re: Joseki question

Post by Shaddy »

mw42 wrote:
Click Here To Show Diagram Code
[go]$$
$$ ----------------
$$ | . . . . . . . .
$$ | . . X . . . . .
$$ | . . Q O . . . .
$$ | . . . , . . . .
$$ | . . . X . . . .
$$ | . . . . . . . .
$$ | . . . . . . . .[/go]

I'd play this move and be satisfied. Black's approach stone seems awkward now and if he wants to live on top he has to crawl. Separating seems important, but

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

This move is immediately bad shape for white, and it leaves black with (a) which threatens to connect and helps his shape on the side.

This move is almost definitely not joseki, it reeks of a trick play to me so maybe someone more educated in those matters can be more helpful.


I'd definitely play the second diagram. I can't find anything actually wrong with it, and the first one sets my trick play alarm off.

Click Here To Show Diagram Code
[go]$$
$$ ----------------
$$ | . . . . . . . .
$$ | . . X . . . . .
$$ | . . O O . B . .
$$ | . . . , . . . .
$$ | . . . X . . . .
$$ | . . . . . . . .
$$ | . . . . . . . .[/go]


For example, what now?
mw42
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Re: Joseki question

Post by mw42 »

Click Here To Show Diagram Code
[go]$$Bm1
$$ ----------------
$$ | . . . . . . . .
$$ | . . X . . . . .
$$ | . . O O . 1 . .
$$ | . . . , a . . .
$$ | . . 2 X . . . .
$$ | . . 4 3 . . . .
$$ | . . . 5 . . . .
$$ | . . 6 . . . . .
$$ | . . . . . . . .[/go]

I don't know, maybe just attach underneath? If black pushes to make a wall, it has a weakness at (a) so maybe this is not so good.

Click Here To Show Diagram Code
[go]$$Bm1
$$ ----------------
$$ | . . . . . . . .
$$ | . . X . . . . .
$$ | . . O O . 1 . .
$$ | . . . , . . . .
$$ | . . 2 X . . . .
$$ | . . 3 4 . . . .
$$ | . . . . . . . .[/go]

If black plays hane then white can cross-cut. He has a two-stone wall to help him in a fight.
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Re: Joseki question

Post by mw42 »

Also it looks like the intention of :b1: might be to seal white in, if that is the case perhaps this is playable (the assumption being the outside is important)

Click Here To Show Diagram Code
[go]$$Bm1 :wt: still has a lot of aji...
$$ ----------------
$$ | . . . . . . . .
$$ | . . X . . . . .
$$ | . . Q Q 5 1 4 .
$$ | . . . , 3 2 6 .
$$ | . . . X . . . .
$$ | . . . . . . . .
$$ | . . . . . . . .[/go]


Click Here To Show Diagram Code
[go]$$Bm1
$$ ----------------
$$ | . . . . . . . .
$$ | . . X . . . . .
$$ | . . O O . 1 . .
$$ | . . . , 4 2 3 .
$$ | . . . X . . . .
$$ | . . . . . . . .
$$ | . . . . . . . .[/go]
Last edited by mw42 on Fri Apr 29, 2011 9:56 am, edited 1 time in total.
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Harleqin
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Re: Joseki question

Post by Harleqin »

I actually had a similar situation in a recent game of mine.

Click Here To Show Diagram Code
[go]$$
$$ ----------------
$$ | . . . . . . . .
$$ | . . 1 . . . . .
$$ | . . 2 O 3 . . .
$$ | . . . , . . . .
$$ | . . . X . . . .
$$ | . . . . . . . .
$$ | . . . . . . . .[/go]



I played :w2:, and Black took :b3:. I think that it is not easy to answer.

Do you think that this is sufficient for White?

Click Here To Show Diagram Code
[go]$$
$$ ----------------
$$ | . . . . . . . .
$$ | . . 1 6 . . . .
$$ | . . 2 O 3 7 . .
$$ | . . . 5 4 . . .
$$ | . 8 . X . 9 . .
$$ | . . 0 . . . . .
$$ | . . . . . . . .[/go]


How urgent do you think is :w10:?
A good system naturally covers all corner cases without further effort.
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Solomon
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Re: Joseki question

Post by Solomon »

mw42 wrote:Also it looks like the intention of :B1: might be to seal white in, if that is the case perhaps this is playable (the assumption being the outside is important)

Click Here To Show Diagram Code
[go]$$Bm1 :wt: still has a lot of aji...
$$ ----------------
$$ | . . . . . . . .
$$ | . . X . . . . .
$$ | . . Q Q 5 1 4 .
$$ | . . . , 3 2 6 .
$$ | . . . X . . . .
$$ | . . . . . . . .
$$ | . . . . . . . .[/go]


Click Here To Show Diagram Code
[go]$$Bm1
$$ ----------------
$$ | . . . . . . . .
$$ | . . X 7 . . . .
$$ | . . O O 5 1 4 .
$$ | . . . , 3 2 6 .
$$ | . . . X . . . .
$$ | . . . . . . . .
$$ | . . . . . . . .[/go]

This is simply terrible for White, unplayable.
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Re: Joseki question

Post by aurik »

Harleqin wrote:I actually had a similar situation in a recent game of mine.

Click Here To Show Diagram Code
[go]$$
$$ ----------------
$$ | . . . . . . . .
$$ | . . 1 . . . . .
$$ | . . 2 O 3 . . .
$$ | . . . , . . . .
$$ | . . . X . . . .
$$ | . . . . . . . .
$$ | . . . . . . . .[/go]



This perhaps exposes the trick play? The normal joseki I see when 3 is played is usually:

Click Here To Show Diagram Code
[go]$$
$$ ----------------
$$ | . . . . . . . .
$$ | . . a . 4 . . .
$$ | . . b O 3 6 . .
$$ | . . . , 5 . . .
$$ | . . . X . . . .
$$ | . . . . . . . .
$$ | . . . . . . . .[/go]


Obviously at this point responding to a at b would be a grave error:
Click Here To Show Diagram Code
[go]$$
$$ ----------------
$$ | . . . . . . . .
$$ | . . X 1 O 2 . .
$$ | . 3 O O X O . .
$$ | . 5 4 , X . . .
$$ | . 8 6 X . . . .
$$ | . 9 7 . . . . .
$$ | . . . . . . . .[/go]


However, your W4 looks to be an excellent result for W.
Keep in mind, I am frequently wrong.
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Re: Joseki question

Post by dedroid »

thanks for all the help! all of this is really helpful.
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Re: Joseki question

Post by Bill Spight »

Hmmm. What about something like this?

Click Here To Show Diagram Code
[go]$$Wc
$$ -----------------------
$$ | . . . . . . . . . . .
$$ | . . X . . . . . . . .
$$ | . . 2 O . 1 . . 3 . .
$$ | . . . , . . . . . , .
$$ | . . . X . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . . . . . . . . . .[/go]


:w1: threatens 2.

Compare with this:

Click Here To Show Diagram Code
[go]$$Bc
$$ -----------------------
$$ | . . . . . . . . . . .
$$ | . . B . . . . . . . .
$$ | . . 1 W . 2 . . 4 . .
$$ | . . . , . . . . . , .
$$ | . . . 3 . . . . . . .
$$ | . . . . . . . . . . .
$$ | . . . . . . . . . . .[/go]


:b1: - :w4: is joseki, but then the exchange of :wc: and :bc: is bad for Black.
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dedroid
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Re: Joseki question

Post by dedroid »

I wouldn't mind that result as black. black gets sente and some nice corner.
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Re: Joseki question

Post by Dusk Eagle »

but then the exchange of :wc: and :bc: is bad for Black.

It is? It looks like a bad exchange for white to me.
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