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Capping reduction with opposing corners.
http://www.lifein19x19.com/viewtopic.php?f=15&t=3814		 Page 1 of 1
Author:  Abydos1 [ Sun May 08, 2011 4:33 pm ]
Post subject:  Capping reduction with opposing corners.
This position occurred in a game of mine and I wasn't sure how to play; I'm somewhat familiar with the cap as a reduction against an entire side formation but haven't really seen it used when the corners are controlled by different players.
Click Here To Show Diagram Code
[go]$$Wc Cap
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . X X . . . . X . . . |
$$ | . . . O X . . . X . O . O . O X . . . |
$$ | . . O , X . X X O , O . . . O , . . . |
$$ | O . O . . . . O O . . . . . . . X . . |
$$ | . O X X . . . . . . . . . X . X . . . |
$$ | . X . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . X X . . . . . . . . . . 1 . X . . |
$$ | . . . . . . X . . . . . . . . . . . . |
$$ | . . O . X . . . . . . . . . . . . . . |
$$ | . . . . . . O . . . . . . . . . . . . |
$$ | . . . . . O . X . . . . . . . . . . . |
$$ | . . . O . . . . . X X O . . . , O . . |
$$ | . . O O O X X X X O O O . . O . . . . |
$$ | . X O X X O O X . . . . . . . . . . . |
$$ | . . . . O . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


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


I played :b2: since my top right is very strong so I wanted to reduce the bottom right and it moves to cut white off and start a large attack. White ended up with a very bad result and :w3: seems to be too greedy in this case. :w3: at a seems to be the right direction to me.
Author:  Kirby [ Sun May 08, 2011 4:38 pm ]
Post subject:  Re: Capping reduction with opposing corners.
I don't know if I like :w3: at 'a', either. Also, white's stones on the top look a bit weak, so I don't know if I want to start too much of a rampage on the right.
Author:  Joaz Banbeck [ Sun May 08, 2011 4:49 pm ]
Post subject:  Re: Capping reduction with opposing corners.
White's :w1: seems an overplay, and I agree with :b2: as being a good refutation. :clap: Consequently, there may be no such thing as a good play for :w3:.

Kirby wrote:
... white's stones on the top look a bit weak, so I don't know if I want to start too much of a rampage on the right.


I agree with this assement. If I felt I had to play on the right, the shoulder hit looks much safer:

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


BTW, I think that white has to play something like 'a' soon. Black has way too much central power.
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