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L & D Series from cyberoro (4K~1K) problem #201
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Author:  Magicwand [ Wed Sep 08, 2010 2:25 am ]
Post subject:  L & D Series from cyberoro (4K~1K) problem #201
EVERYONE IS SOLVING PROBLEMS TOO EASYLY. NOW TRY THIS.
THIS IS RATED 1~4K BUT I THINK IT IS MUCH HARDER THAN THAT.
BLACK TO PLAY
Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . . . . X O |
$$ | . . . X O . . . . . . . . |
$$ ----------------------------[/go]
Author:  tchan001 [ Wed Sep 08, 2010 4:41 am ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O 6 O 7 . . . X O |
$$ | . . . X O . 5 . 3 . 1 4 2 |
$$ ----------------------------[/go]


hm, I think I'm solving this for a 19x19 board where the right side is further out
Author:  flOvermind [ Wed Sep 08, 2010 4:50 am ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
tchan001 wrote:
Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O 6 O 7 . . . X O |
$$ | . . . X O . 5 . 3 . 1 4 2 |
$$ ----------------------------[/go]


hm, I think I'm solving this for a 19x19 board where the right side is further out


Even with a bigger board, I don't see why white should play :w2:. With :w2: at or one point right of :b7:, black still can't escape, and white lives in sente.

As for a solution, I haven't found anything that definitely kills white yet ;)
Author:  tchan001 [ Wed Sep 08, 2010 5:33 am ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
It's a "Black to play" problem. Meaning it's not necessarily Black to kill. The solution I propose is to make sure Black lives. The solution I played was assuming W tried his hardest to stop Black from living after the first move.
Author:  Magicwand [ Wed Sep 08, 2010 6:11 am ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
tchan001 wrote:
It's a "Black to play" problem. Meaning it's not necessarily Black to kill. The solution I propose is to make sure Black lives. The solution I played was assuming W tried his hardest to stop Black from living after the first move.

fyi, object is to live unconditionally.
this is ko. can do better than ko.
Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . 2 3 . X O |
$$ | . . . X O . . . 4 5 1 6 . |
$$ ----------------------------[/go]
Author:  nagano [ Wed Sep 08, 2010 6:53 am ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
Good one. I think this is it:
Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . 4 5 . X O |
$$ | . . . X O . 2 1 . 6 7 3 . |
$$ ----------------------------[/go]

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O 2 3 . . X O |
$$ | . . . X O . 4 1 . . . 5 . |
$$ ----------------------------[/go]

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O 4 O 8 2 5 . X O |
$$ | . . . X O . 3 1 6 7 . 9 . |
$$ ----------------------------[/go]

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O 5 O . 2 . 7 X O |
$$ | . . . X O . 3 1 4 . 8 6 . |
$$ ----------------------------[/go]
Author:  Marcus [ Wed Sep 08, 2010 7:00 am ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
I think I got it. Someone correct me, if I'm wrong.

Click Here To Show Diagram Code
[go]$$Bcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O 4 O 8 2 5 . X O |
$$ | . . . X O . 3 1 6 7 . 9 . |
$$ ----------------------------[/go]


Click Here To Show Diagram Code
[go]$$Bcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O 5 O . 2 . . X O |
$$ | . . . X O . 3 1 4 . . . . |
$$ ----------------------------[/go]



Click Here To Show Diagram Code
[go]$$Bcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O 6 O 2 3 . 4 X O |
$$ | . . . X O . 5 1 7 . . . . |
$$ ----------------------------[/go]


Click Here To Show Diagram Code
[go]$$Bcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O 2 3 . . X O |
$$ | . . . X O . 4 1 6 7 . 5 . |
$$ ----------------------------[/go]


EDIT: Nagano seems to have the same solution.
Author:  topazg [ Wed Sep 08, 2010 7:10 am ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
@magicwand:

For what it is worth, that's no ko :)

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . 2 3 . X O |
$$ | . . . X O . 7 . 4 5 1 6 . |
$$ ----------------------------[/go]
Author:  Marcus [ Wed Sep 08, 2010 7:41 am ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
topazg wrote:
@magicwand:

For what it is worth, that's no ko :)

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . 2 3 . X O |
$$ | . . . X O . 7 . 4 5 1 6 . |
$$ ----------------------------[/go]


That sequence makes me smile. :D Nice!
Author:  Magicwand [ Wed Sep 08, 2010 7:51 am ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
topazg wrote:
@magicwand:

For what it is worth, that's no ko :)

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . 2 3 . X O |
$$ | . . . X O . 7 . 4 5 1 6 . |
$$ ----------------------------[/go]

good catch. now it is ko.
Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . 2 3 . X O |
$$ | . . . X O . . 4 . . 1 . . |
$$ ----------------------------[/go]
Author:  mithra [ Wed Sep 08, 2010 8:19 am ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
topazg wrote:
@magicwand:

For what it is worth, that's no ko :)

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . 2 3 . X O |
$$ | . . . X O . 7 . 4 5 1 6 . |
$$ ----------------------------[/go]

But W can better directly start the ko at move 4.
Author:  Chew Terr [ Wed Sep 08, 2010 8:46 am ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
This problem seems solvable, so I must be missing something. =D After this attempt, I looked back and no one has my solution, which is another bad sign~
Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O 4 6 7 2 X O |
$$ | . . . X O . 3 5 1 . . . . |
$$ ----------------------------[/go]

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O 4 2 3 . X O |
$$ | . . . X O . . . 1 . . 5 . |
$$ ----------------------------[/go]

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . 3 2 4 X O |
$$ | . . . X O . . . 1 . . 5 . |
$$ ----------------------------[/go]
Author:  Marcus [ Wed Sep 08, 2010 8:53 am ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
Chew Terr wrote:
This problem seems solvable, so I must be missing something. =D After this attempt, I looked back and no one has my solution, which is another bad sign~
Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O 4 6 7 2 X O |
$$ | . . . X O . 3 5 1 . . . . |
$$ ----------------------------[/go]

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O 4 2 3 . X O |
$$ | . . . X O . . . 1 . . 5 . |
$$ ----------------------------[/go]

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . 3 2 4 X O |
$$ | . . . X O . . . 1 . . 5 . |
$$ ----------------------------[/go]


Here's the line I think you're missing:

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . . . . X O |
$$ | . . . X O . . 2 1 . . . . |
$$ ----------------------------[/go]


White can force ko.
Author:  Chew Terr [ Wed Sep 08, 2010 8:55 am ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
Right, thanks, Marcus!
Author:  Dusk Eagle [ Wed Sep 08, 2010 3:19 pm ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
Click Here To Show Diagram Code
[go]$$Bcm1 Marcus posted the variations
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . . . . X O |
$$ | . . . X O . . 1 . . . . . |
$$ ----------------------------[/go]

(Assuming I'm right) I didn't think the problem was that hard, but it may have helped that at first I thought it was "Black to kill" before I realized that black only had one eye himself.
Author:  Loons [ Sat Sep 11, 2010 4:37 pm ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
Rather long:
Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . . . c X O |
$$ | . . . X O . a x y . . b . |
$$ ----------------------------[/go]


Heuristically, black must aim at the weakness at a, which white will protect allowing black to make an eye. Kinda cheating to think of it that way, but eh. x and y seem to do that. Because of the ko at b, there's really only kinda half an eye in gote around c. So, trying x -

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . 5 b a X O |
$$ | . . . X O . 2 1 . 4 . 3 . |
$$ ----------------------------[/go]

Black has lots of external liberties, so it seems to work. Good shot in the dark. 2 @ a white seems to die. 4 at 5, 5 at b white seems to have a shortage of liberties.

Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O 6 7 . 2 X O |
$$ | . . . X O . 5 1 . . 4 3 . |
$$ ----------------------------[/go]

But what if
Click Here To Show Diagram Code
[go]$$Bcm1 Some hijinks
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O . 3 . 5 X O |
$$ | . . . X O . 4 1 . 2 . . . |
$$ ----------------------------[/go]


Click Here To Show Diagram Code
[go]$$Bcm1 4 @ 6, 5 @ a
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O 2 3 . . X O |
$$ | . . . X O . 6 1 5 4 . a . |
$$ ----------------------------[/go]


Click Here To Show Diagram Code
[go]$$Bcm1 4 @ 8, 7 @9 or 4 @ 7, 5 @ 8
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . O . O . . . . . . |
$$ | . . . O . . . . O O O . . |
$$ | . . O . X X X X X X . O . |
$$ | . . . , X O O O X , X O . |
$$ | . . O X X O . O X X X O . |
$$ | . O . X O . O 6 2 3 . X O |
$$ | . . . X O . 9 1 5 4 7 8 . |
$$ ----------------------------[/go]


That's a lot of diagram writing, I hope I didn't get mixed up somewhere. I miss anything ?
Author:  Magicwand [ Sat Sep 11, 2010 7:32 pm ]
Post subject:  Re: L & D Series from cyberoro (4K~1K) problem #201
impressive!
everyone solving problems rather easily.
from now on i will only post hard problems so people can enjoy more.
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