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Problem of the day ( 1Dan - 3Dan ) - Sept 19th, 2010

https://www.lifein19x19.com/viewtopic.php?t=1687

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Problem of the day ( 1Dan - 3Dan ) - Sept 19th, 2010

Posted: Sun Sep 19, 2010 9:01 pm
by Joaz Banbeck
Problems from the Cotsen tournament, for all of you who could not make it:
Click Here To Show Diagram Code
[go]$$Bc Black to kill
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X X . . . . . . . . . .
$$ | . O O X X . X . . . . . .
$$ | . . . X O X . . . . . . .
$$ | . . O O O O X X . . . . .
$$ | . . . . . . . . . . . . .
$$ |--------------------------[/go]

Re: Problem of the day ( 1Dan - 3Dan ) - Sept 19th, 2010

Posted: Sun Sep 19, 2010 9:25 pm
by kokomi
Best i can see is ko

Click Here To Show Diagram Code
[go]$$Bc Black to kill(ko)
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X X . . . . . . . . . .
$$ | 5 O O X X . X . . . . . .
$$ | . 1 4 X O X . . . . . . .
$$ | 3 2 O O O O X X . . . . .
$$ | . . . . . . . . . . . . .
$$ |--------------------------[/go]
Click Here To Show Diagram Code
[go]$$Bc Black to kill
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X X . . . . . . . . . .
$$ | 5 O O X X . X . . . . . .
$$ | 2 1 6 X O X . . . . . . .
$$ | 3 4 O O O O X X . . . . .
$$ | . . . . . . . . . . . . .
$$ |--------------------------[/go]
:b7: = :w2:
Click Here To Show Diagram Code
[go]$$Bc Black to kill(ko)
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X X . . . . . . . . . .
$$ | 3 O O X X . X . . . . . .
$$ | . 1 2 X O X . . . . . . .
$$ | 5 4 O O O O X X . . . . .
$$ | . . . . . . . . . . . . .
$$ |--------------------------[/go]

Re: Problem of the day ( 1Dan - 3Dan ) - Sept 19th, 2010

Posted: Sun Sep 19, 2010 11:03 pm
by Joaz Banbeck
kokomi wrote:Best i can see is ko...
An unconditional kill is possible.

Re: Problem of the day ( 1Dan - 3Dan ) - Sept 19th, 2010

Posted: Mon Sep 20, 2010 4:27 am
by Sverre
Click Here To Show Diagram Code
[go]$$Bc This was hard; is this right?
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X X . . . . . . . . . .
$$ | 7 O O X X . X . . . . . .
$$ | 8 2 4 X O X . . . . . . .
$$ | 1 3 O O O O X X . . . . .
$$ | . 6 . . 9 5 . . . . . . .
$$ |--------------------------[/go]

Re: Problem of the day ( 1Dan - 3Dan ) - Sept 19th, 2010

Posted: Mon Sep 20, 2010 5:35 am
by zinger
kokomi wrote:
Best i can see is ko

Click Here To Show Diagram Code
[go]$$Bc Black to kill(ko)
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X X . . . . . . . . . .
$$ | 5 O O X X . X . . . . . .
$$ | . 1 4 X O X . . . . . . .
$$ | 3 2 O O O O X X . . . . .
$$ | . . . . . . . . . . . . .
$$ |--------------------------[/go]
Click Here To Show Diagram Code
[go]$$Bc Black to kill
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X X . . . . . . . . . .
$$ | 5 O O X X . X . . . . . .
$$ | 2 1 6 X O X . . . . . . .
$$ | 3 4 O O O O X X . . . . .
$$ | . . . . . . . . . . . . .
$$ |--------------------------[/go]
:b7: = :w2:
Click Here To Show Diagram Code
[go]$$Bc Black to kill(ko)
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X X . . . . . . . . . .
$$ | 3 O O X X . X . . . . . .
$$ | . 1 2 X O X . . . . . . .
$$ | 5 4 O O O O X X . . . . .
$$ | . . . . . . . . . . . . .
$$ |--------------------------[/go]
Click Here To Show Diagram Code
[go]$$Bc
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X X . . . . . . . . . .
$$ | . O O X X . X . . . . . .
$$ | . 1 . X O X . . . . . . .
$$ | 2 . O O O O X X . . . . .
$$ | . . . . . . . . . . . . .
$$ |--------------------------[/go]

Re: Problem of the day ( 1Dan - 3Dan ) - Sept 19th, 2010

Posted: Mon Sep 20, 2010 6:43 am
by Mehmet
Sverre wrote:
Click Here To Show Diagram Code
[go]$$Bc This was hard; is this right?
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X X . . . . . . . . . .
$$ | 7 O O X X . X . . . . . .
$$ | 8 2 4 X O X . . . . . . .
$$ | 1 3 O O O O X X . . . . .
$$ | . 6 . . 9 5 . . . . . . .
$$ |--------------------------[/go]
if answer of 1 is to play at 8, the same position with zinger's post

Re: Problem of the day ( 1Dan - 3Dan ) - Sept 19th, 2010

Posted: Mon Sep 20, 2010 8:05 am
by Magicwand
Mehmet wrote:
Sverre wrote:
Click Here To Show Diagram Code
[go]$$Bc This was hard; is this right?
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X X . . . . . . . . . .
$$ | 7 O O X X . X . . . . . .
$$ | 8 2 4 X O X . . . . . . .
$$ | 1 3 O O O O X X . . . . .
$$ | . 6 . . 9 5 . . . . . . .
$$ |--------------------------[/go]
if answer of 1 is to play at 8, the same position with zinger's post
i want you to look at it again. i think his answer is correct
Click Here To Show Diagram Code
[go]$$Bc This was hard; is this right?
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X . . . . . . . . . . .
$$ | . . . . . . . . . . . . .
$$ | . X X . . . . . . . . . .
$$ | 5 O O X X . X . . . . . .
$$ | 2 3 4 X O X . . . . . . .
$$ | 1 6 O O O O X X . . . . .
$$ | . . . . . . . . . . . . .
$$ |--------------------------[/go]
:b7: at :w2:

Re: Problem of the day ( 1Dan - 3Dan ) - Sept 19th, 2010

Posted: Mon Sep 20, 2010 2:58 pm
by Bill Spight
Nobody has posted this amusing variation. ;)

Re: Problem of the day ( 1Dan - 3Dan ) - Sept 19th, 2010

Posted: Wed Sep 22, 2010 12:13 pm
by Dusk Eagle
I love move 13 there.

Re: Problem of the day ( 1Dan - 3Dan ) - Sept 19th, 2010

Posted: Tue Sep 28, 2010 4:13 am
by Mehmet
Bill Spight wrote:Nobody has posted this amusing variation. ;)
Good variation of damezumeri.
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