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.

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[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]

was hailed as a brilliant move. After the 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?

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).

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[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]

_________________
Patience, grasshopper.

I think it could go like this after White 164: