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Offline drmwc
 Post subject: Nice endgame problem
Post #1 Posted: Sat Jul 27, 2013 1:10 pm 
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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?

This post by drmwc was liked by 3 people: billywoods, illluck, Splatted
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Offline HermanHiddema
 Post subject: Re: Nice endgame problem
Post #2 Posted: Sat Jul 27, 2013 1:34 pm 
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Slightly more elaborate version: http://senseis.xmp.net/?XuanxuanQijingProblem198
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Offline Splatted
 Post subject: Re: Nice endgame problem
Post #3 Posted: Sat Jul 27, 2013 1:49 pm 
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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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Offline moyoaji
 Post subject: Re: Nice endgame problem
Post #4 Posted: Sat Jul 27, 2013 1:52 pm 
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This solution didn't work. See my other one.

Here is my solution.



Attachments:
Solution.sgf [492 Bytes]
Downloaded 504 times

_________________
"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


Last edited by moyoaji on Sat Jul 27, 2013 2:05 pm, edited 1 time in total.
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Offline drmwc
 Post subject: Re: Nice endgame problem
Post #5 Posted: Sat Jul 27, 2013 1:54 pm 
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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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Offline moyoaji
 Post subject: Re: Nice endgame problem
Post #6 Posted: Sat Jul 27, 2013 2:04 pm 
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But what if I change the order of moves to make it happen?



Attachments:
Solution.sgf [528 Bytes]
Downloaded 548 times

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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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Offline drmwc
 Post subject: Re: Nice endgame problem
Post #7 Posted: Sat Jul 27, 2013 2:11 pm 
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Well done - that works.

I like double snap backs.
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Offline Splatted
 Post subject: Re: Nice endgame problem
Post #8 Posted: Sat Jul 27, 2013 2:30 pm 
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I (eventually) got the same solution as moyoaji. Thanks for posting it was a fun problem. :D
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Offline logan
 Post subject: Re: Nice endgame problem
Post #9 Posted: Sat Jul 27, 2013 7:54 pm 
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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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