Orthodox fuseki question

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fwiffo
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Orthodox fuseki question

Post by fwiffo »

This is a common sequence in pro games:

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

Click Here To Show Diagram Code
[go]$$Wm11
$$ --------------
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . X . . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . . X . . |
$$ . . . X . . . |
$$ . . . X O . . |
$$ . 2 X O O . . |
$$ . . 1 X O . . |
$$ . . 3 b O . . |
$$ . . . a . . . |
$$ . . . . . . . |
$$ . . . , X . . |
$$ . . X . . . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ --------------[/go]

White gets eyes and black gets sente. Black will make an extension on the top side, and may exchange a for b first.

But I see this a lot in my games when I play this opening:
Click Here To Show Diagram Code
[go]$$W
$$ --------------
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . X . . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . 9 2 . . |
$$ . . . 8 7 . . |
$$ . . . 6 1 . . |
$$ . . . . . . . |
$$ . . . 4 5 . . |
$$ . . . . 3 . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . , X . . |
$$ . . X . . . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ --------------[/go]

There must be a good reason why pros don't play this way, but it seems like I end up with an unfavorable result. How should this be handled?
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topazg
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Re: Orthodox fuseki question

Post by topazg »

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


Like this ?

Click Here To Show Diagram Code
[go]$$W
$$ --------------
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . X . . . |
$$ . . . . . . . |
$$ . . . . 2 . . |
$$ . . . 1 . . . |
$$ . . . O X X . |
$$ . . . X O . . |
$$ . . 6 X O . . |
$$ . . 4 3 5 . . |
$$ . 8 7 X O . . |
$$ . . 9 . O . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . , X . . |
$$ . . X . . . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ --------------[/go]
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fwiffo
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Re: Orthodox fuseki question

Post by fwiffo »

I guess I find that result a bit unsatisfying too. Compared to the pro sequence, black has less attractive shape and has cutting stones to deal with. But white doesn't seem worse off. Is it just that the corner is less open to invasion now?
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Re: Orthodox fuseki question

Post by Shaddy »

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

How about this? w can't capture the circled stone now, and black's got a decent wall. Not to mention w's group has pretty bad shape now.
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fwiffo
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Re: Orthodox fuseki question

Post by fwiffo »

That's actually pretty close to what I've been getting the past two times I've seen this.

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

I guess I might be looking for some kind of "super severe move of great justice" which is not reasonable here.
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Re: Orthodox fuseki question

Post by Dusk Eagle »

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

How about this? w can't capture the circled stone now, and black's got a decent wall. Not to mention w's group has pretty bad shape now.

I considered that myself, but this doesn't feel too attractive:

Click Here To Show Diagram Code
[go]$$W
$$ --------------
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . X . . . |
$$ . . . . 7 . . |
$$ . . . . 5 6 . |
$$ . . . . 1 4 . |
$$ . . . O X 2 . |
$$ . . . X O 3 . |
$$ . . . X O . . |
$$ . . . X X O . |
$$ . . . X O . . |
$$ . . . . O . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ . . . , X . . |
$$ . . X . . . . |
$$ . . . . . . . |
$$ . . . . . . . |
$$ --------------[/go]
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Re: Orthodox fuseki question

Post by Shaddy »

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


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

Fight!
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Re: Orthodox fuseki question

Post by Magicwand »

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


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

Fight!


way you cut was wrong. you should have cut at 7 first. cut at 5 is wrong.
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fwiffo
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Re: Orthodox fuseki question

Post by fwiffo »

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

I got a chance to ask Battousai today, and he suggests this response by black in response to :w1:, which is sorta obvious in retrospect. :b6: is the move I was looking for to keep sente (if black turns, white gets sealed-in in sente) and expose why pros don't play :w1:.
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Re: Orthodox fuseki question

Post by Jonas »

I think in most pro games black will first kakari in the upper left corner to form the moyo. If he kakaris after the sequence you have prepared White will certainly not answer with the calm keima!
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