Nice endgame problem

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drmwc
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Nice endgame problem

Post by drmwc »

Here's an endgame problem:
Click Here To Show Diagram Code
[go]$$c
$$ . . . . . . . . . . . . . . |
$$ . . . . . . . O O O O O . . |
$$ . . . . . . O O X X X O . . |
$$ . . . O O O O X X . X O O O |
$$ . . . O X X X . . . . X X X |
$$ . . . O X . . . . . . . . X |
$$ ---------------[/go]
The rest of the board is settled. White to play - is there anything she can do?
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HermanHiddema
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Re: Nice endgame problem

Post by HermanHiddema »

Slightly more elaborate version: http://senseis.xmp.net/?XuanxuanQijingProblem198
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Splatted
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Re: Nice endgame problem

Post by Splatted »

Edit: Nope, I don't know the answer. :D
Last edited by Splatted on Sat Jul 27, 2013 1:53 pm, edited 1 time in total.
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moyoaji
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Re: Nice endgame problem

Post by moyoaji »

This solution didn't work. See my other one.
Here is my solution.

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Solution.sgf
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Last edited by moyoaji on Sat Jul 27, 2013 2:05 pm, edited 1 time in total.
"You have to walk before you can run. Black 1 was a walking move.
I blushed inwardly to recall the ignorant thoughts that had gone through
my mind before, when I had not realized the true worth of Black 1."
-Kageyama Toshiro on proper moves
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drmwc
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Re: Nice endgame problem

Post by drmwc »

Close, Splatted amd moyoaji but...
Click Here To Show Diagram Code
[go]$$Wc1
$$ . . . . . . . . . . . . . . |
$$ . . . . . . . O O O O O . . |
$$ . . . . . . O O X X X O . . |
$$ . . . O O O O X X . X O O O |
$$ . . . O X X X 1 2 7 5 X X X |
$$ . . . O X . . 3 4 . 6 8 . X |
$$ ---------------[/go]
The double snap back does not emerge.
I hadn't realised this was a classic problem - my source was a relatively recent Korean book of endgame problems.
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moyoaji
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Re: Nice endgame problem

Post by moyoaji »

But what if I change the order of moves to make it happen?

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Solution.sgf
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"You have to walk before you can run. Black 1 was a walking move.
I blushed inwardly to recall the ignorant thoughts that had gone through
my mind before, when I had not realized the true worth of Black 1."
-Kageyama Toshiro on proper moves
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drmwc
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Re: Nice endgame problem

Post by drmwc »

Well done - that works.

I like double snap backs.
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Re: Nice endgame problem

Post by Splatted »

I (eventually) got the same solution as moyoaji. Thanks for posting it was a fun problem. :D
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Re: Nice endgame problem

Post by logan »

HermanHiddema wrote:Slightly more elaborate version: http://senseis.xmp.net/?XuanxuanQijingProblem198
drmwc wrote:I hadn't realised this was a classic problem - my source was a relatively recent Korean book of endgame problems.
Yep, there are around a dozen variations on this double snapback theme in the Xuanxuan Qijing, and even more in the Guanzi Pu.

Thank-you for sharing drmwc.
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