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 Post subject: Joseki question
Post #1 Posted: Thu Apr 28, 2011 11:35 pm 
Dies in gote

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KGS: 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

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 Post subject: Re: Joseki question
Post #2 Posted: Fri Apr 29, 2011 12:30 am 
Lives in gote

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Universal go server handle: 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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 Post subject: Re: Joseki question
Post #3 Posted: Fri Apr 29, 2011 3:44 am 
Lives in sente
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Rank: KGS 5d
KGS: Str1fe, Midorisuke
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?

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 Post subject: Re: Joseki question
Post #4 Posted: Fri Apr 29, 2011 4:55 am 
Lives in gote

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Universal go server handle: 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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 Post subject: Re: Joseki question
Post #5 Posted: Fri Apr 29, 2011 5:07 am 
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Universal go server handle: 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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 Post subject: Re: Joseki question
Post #6 Posted: Fri Apr 29, 2011 8:33 am 
Lives in sente
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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:?

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 Post subject: Re: Joseki question
Post #7 Posted: Fri Apr 29, 2011 8:37 am 
Gosei
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Rank: AGA 5d
KGS: Capsule 4d
Tygem: 치킨까스 5d
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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 Post subject: Re: Joseki question
Post #8 Posted: Fri Apr 29, 2011 10:43 am 
Dies in gote

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Rank: KGS 3k
KGS: 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.

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 Post subject: Re: Joseki question
Post #9 Posted: Fri Apr 29, 2011 5:03 pm 
Dies in gote

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KGS: dedroid
thanks for all the help! all of this is really helpful.

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 Post subject: Re: Joseki question
Post #10 Posted: Fri Apr 29, 2011 5:18 pm 
Honinbo

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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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 Post subject: Re: Joseki question
Post #11 Posted: Sat Apr 30, 2011 7:42 pm 
Dies in gote

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KGS: dedroid
I wouldn't mind that result as black. black gets sente and some nice corner.

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 Post subject: Re: Joseki question
Post #12 Posted: Sat Apr 30, 2011 9:51 pm 
Gosei
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Quote:
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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