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Offline xed_over
 Post subject: Re: Damezumari, anyone?
Post #21 Posted: Sat Oct 26, 2013 4:45 pm 
Oza

Posts: 2264
Liked others: 1180
Was liked: 553
Bill Spight wrote:
The solution has been found, but it is spread over more than one post by more than one person. Not so easy, but a cool problem. :)

Solution below.

Click Here To Show Diagram Code
[go]$$B Black to play
$$ ----------------
$$ . . . . . . . . |
$$ . . . . . X . X |
$$ . . . . . . X O |
$$ . . . . X X O O |
$$ . . . X . O 6 . |
$$ . . . X O . O 3 |
$$ . . X O O 2 1 5 |
$$ . . X . . O X . |
$$ . . . X . O X 4 |
$$ . . . . , X O . |
$$ . . . . . X O . |
$$ . . . . . X O . |
$$ . . . . . X X X |
$$ . . . . . . . . |
$$ . . . . . . . . |[/go]


:b1: is a vital point, forcing :w2: . :b3: threatens to capture the White stones one the bottom, a snapback, and a ko. It does White no good to protect at :w6: now.

:b5: is excellent! It allows White to protect at :w6: and capture the five Black stones. It turns out that they are poison.

but wait, why can't :b5: play here? game over, no? white still can't live, right? What am I missing?

[hide]
Click Here To Show Diagram Code
[go]$$B Black to play
$$ ----------------
$$ . . . . . . . . |
$$ . . . . . X . X |
$$ . . . . . . X O |
$$ . . . . X X O O |
$$ . . . X . O . . |
$$ . . . X O . O 3 |
$$ . . X O O 2 1 . |
$$ . . X . . O X . |
$$ . . . X . O X 4 |
$$ . . . . , X O 5 |
$$ . . . . . X O . |
$$ . . . . . X O . |
$$ . . . . . X X X |
$$ . . . . . . . . |
$$ . . . . . . . . |[/go]

This post by xed_over was liked by: Bill Spight
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Offline Bill Spight
 Post subject: Re: Damezumari, anyone?
Post #22 Posted: Sat Oct 26, 2013 5:32 pm 
Honinbo

Posts: 10905
Liked others: 3651
Was liked: 3374
xed_over wrote:
Bill Spight wrote:
The solution has been found, but it is spread over more than one post by more than one person. Not so easy, but a cool problem. :)

Solution below.

Click Here To Show Diagram Code
[go]$$B Black to play
$$ ----------------
$$ . . . . . . . . |
$$ . . . . . X . X |
$$ . . . . . . X O |
$$ . . . . X X O O |
$$ . . . X . O 6 . |
$$ . . . X O . O 3 |
$$ . . X O O 2 1 5 |
$$ . . X . . O X . |
$$ . . . X . O X 4 |
$$ . . . . , X O . |
$$ . . . . . X O . |
$$ . . . . . X O . |
$$ . . . . . X X X |
$$ . . . . . . . . |
$$ . . . . . . . . |[/go]


:b1: is a vital point, forcing :w2: . :b3: threatens to capture the White stones one the bottom, a snapback, and a ko. It does White no good to protect at :w6: now.

:b5: is excellent! It allows White to protect at :w6: and capture the five Black stones. It turns out that they are poison.

but wait, why can't :b5: play here? game over, no? white still can't live, right? What am I missing?

[hide]
Click Here To Show Diagram Code
[go]$$B Black to play
$$ ----------------
$$ . . . . . . . . |
$$ . . . . . X . X |
$$ . . . . . . X O |
$$ . . . . X X O O |
$$ . . . X . O . . |
$$ . . . X O . O 3 |
$$ . . X O O 2 1 . |
$$ . . X . . O X . |
$$ . . . X . O X 4 |
$$ . . . . , X O 5 |
$$ . . . . . X O . |
$$ . . . . . X O . |
$$ . . . . . X X X |
$$ . . . . . . . . |
$$ . . . . . . . . |[/go]


It's not the book solution, but we think that you are right. :) SoDesuNe found the same move, and neither ez4u nor I found a refutation.

Click Here To Show Diagram Code
[go]$$B Black to play
$$ ----------------
$$ . . . . . . . . |
$$ . . . . . X . X |
$$ . . . . . . X O |
$$ . . . . X X O O |
$$ . . . X 9 O 8 . |
$$ . . . X O . O 3 |
$$ . . X O O 2 1 7 |
$$ . . X . . O X . |
$$ . . . X . O X 4 |
$$ . . . . , X O 5 |
$$ . . . . . X O 6 |
$$ . . . . . X O . |
$$ . . . . . X X X |
$$ . . . . . . . . |
$$ . . . . . . . . |[/go]


I do not see anything better than :w6:, and then :b7: keeps things simple. :)

_________________
The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.
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Offline xed_over
 Post subject: Re: Damezumari, anyone?
Post #23 Posted: Sat Oct 26, 2013 8:05 pm 
Oza

Posts: 2264
Liked others: 1180
Was liked: 553
Bill Spight wrote:
It's not the book solution, but we think that you are right. :) SoDesuNe found the same move, and neither ez4u nor I found a refutation.


ah right, there were so many variations in all the posts (and I had to unhide them all to try and follow them all), I missed those. sorry. thanks.
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Offline Bill Spight
 Post subject: Re: Damezumari, anyone?
Post #24 Posted: Sat Oct 26, 2013 8:21 pm 
Honinbo

Posts: 10905
Liked others: 3651
Was liked: 3374
xed_over wrote:
Bill Spight wrote:
It's not the book solution, but we think that you are right. :) SoDesuNe found the same move, and neither ez4u nor I found a refutation.


ah right, there were so many variations in all the posts (and I had to unhide them all to try and follow them all), I missed those. sorry. thanks.


My apologies. I have edited the solution page now. :)

_________________
The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.
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Offline cyclops
 Post subject: Re: Damezumari, anyone?
Post #25 Posted: Sun Oct 27, 2013 2:26 pm 
Lives in sente
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Location: Amsterdam (NL)
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Rank: KGS 7 kyu forever
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For the record. I pushed the like button in Bills solution post before he edited it. If you think I still like it you may be correct.

_________________
I think I am so I think I am.
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Offline HermanHiddema
 Post subject: Re: Damezumari, anyone?
Post #26 Posted: Mon Oct 28, 2013 12:55 am 
Gosei
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Location: Groningen, NL
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Rank: Dutch 4D
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Universal go server handle: herminator
cyclops wrote:
For the record. I pushed the like button in Bills solution post before he edited it. If you think I still like it you may be correct.


And if you don't there's always the unlike button :)
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