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Reading Exercise
http://www.lifein19x19.com/viewtopic.php?f=15&t=2630		 Page 1 of 1
Author:  hiyayang [ Sat Dec 18, 2010 8:40 pm ]
Post subject:  Reading Exercise
Below is the final position of Game 7, with Lu Ning 6d of China as Black vs. Park 7d of Korea, of the ongoing China-Korea Amateur SuperGo Match -- the "Shuanglong Qiju" Cup, named after a maker of game sets based in Luoyang, China. For the complete game record, see http://duiyi.sina.com.cn/cGibo/201012/louivbn.SGF.

Click Here To Show Diagram Code
[go]$$B Moves 161 to 163
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O O O O O . X X . . X O . . . . . |
$$ | . O X O X O X X X O X X X X O . . . . |
$$ | . O X X X X O O O O . . X O . , X . . |
$$ | . O O X . . X X . . . . . . . X . . . |
$$ | X O O X X X O O . . O . . . . . X . . |
$$ | . X X O X X X O X X . . X X X X O O . |
$$ | . O O O O X O X O . . O X O O O . . . |
$$ | . X X . O X . X O . O . O . . . . . . |
$$ | . . . , O . . X . , . X . . O , O . . |
$$ | . . X O . . . . . O . O . O . . . . . |
$$ | . . X 2 . . O O . O X X X X X X X . . |
$$ | . . 3 X O X O X O . X O O X . O . . . |
$$ | . . X O O X X X X X X O X . X . . . . |
$$ | . X O . . . . . . O . O O . O O . O . |
$$ | . X . O 1 . X X . O . O . . O , O . . |
$$ | . . O . . O O O . . . . . X X X X O X |
$$ | . . . . . . . . . . . . . . . . . X . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


:b1: was hailed as a brilliant move. After the :w2: :b3: exchange (probably just to allow white a bit more time to read out the sequences), white resigned.

Do you see why the black dragon is alive?
Author:  daal [ Sun Dec 19, 2010 1:55 am ]
Post subject:  Re: Reading Exercise
hiyayang wrote:

Do you see why the black dragon is alive?


No. I need a hint. What's black's response to 1? (please hide any responses to my post, so as not to ruin the problem for others).

Click Here To Show Diagram Code
[go]$$W Hopeless White 164?
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O O O O O . X X . . X O . . . . . |
$$ | . O X O X O X X X O X X X X O . . . . |
$$ | . O X X X X O O O O . . X O . , X . . |
$$ | . O O X . . X X . . . . . . . X . . . |
$$ | X O O X X X O O . . O . . . . . X . . |
$$ | . X X O X X X O X X . . X X X X O O . |
$$ | . O O O O X O X O . . O X O O O . . . |
$$ | . X X . O X . X O . O . O . . . . . . |
$$ | . . . , O . . X . , . X . . O , O . . |
$$ | . . X O . . . . . O . O . O . . . . . |
$$ | . . X O . . O O . O X X X X X X X . . |
$$ | . . X X O X O X O . X O O X . O 1 . . |
$$ | . . X O O X X X X X X O X . X . . . . |
$$ | . X O . . . . . . O . O O . O O . O . |
$$ | . X . O X . X X . O . O . . O , O . . |
$$ | . . O . . O O O . . . . . X X X X O X |
$$ | . . . . . . . . . . . . . . . . . X . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Author:  hiyayang [ Mon Dec 20, 2010 5:24 am ]
Post subject:  Re: Reading Exercise
daal wrote:

No. I need a hint. What's black's response to 1? (please hide any responses to my post, so as not to ruin the problem for others).


I think it could go like this after White 164:

Click Here To Show Diagram Code
[go]$$W Hopeless White 164?
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O O O O O . X X . . X O . . . . . |
$$ | . O X O X O X X X O X X X X O . . . . |
$$ | . O X X X X O O O O . . X O . , X . . |
$$ | . O O X . . X X . . . . . . . X . . . |
$$ | X O O X X X O O . . O . . . . . X . . |
$$ | . X X O X X X O X X . . X X X X O O . |
$$ | . O O O O X O X O . . O X O O O . . . |
$$ | . X X . O X . X O . O . O . . . . . . |
$$ | . . . , O . . X . , . X . . O , O . . |
$$ | . . X O . 3 . . . O . O . O . . . . . |
$$ | . . X O a 2 O O . O X X X X X X X . . |
$$ | . . X X O X O X O . X O O X . O 1 . . |
$$ | . . X O O X X X X X X O X . X . . . . |
$$ | . X O 5 4 . . . . O . O O . O O . O . |
$$ | . X . O X . X X . O . O . . O , O . . |
$$ | . . O b 6 O O O c . . . . X X X X O X |
$$ | . . . . . . . . . . . . . . . . . X . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Because of the weak spots at a, b and c in its own groups, white wouldn't have time to prevent black from creating another eye at the bottom.
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