Life In 19x19 :: L & D Series from cyberoro (5D PLUS) problem #180

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L & D Series from cyberoro (5D PLUS) problem #180 http://www.lifein19x19.com/viewtopic.php?f=15&t=1721	Page 1 of 1

Author:	Magicwand [ Thu Sep 23, 2010 6:37 pm ]
Post subject:	L & D Series from cyberoro (5D PLUS) problem #180
BLACK TO CAPTURE Click Here To Show Diagram Code [go]$$Bcm1 Prisoners: W=0, B=0 $$ ----------------------------- $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . , . . . . . , . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . X X X . X . . \| $$ \| . . . . X X . O . . . X . \| $$ \| . . . , X O . . O O O X . \| $$ \| . . . X . O . . O X O X . \| $$ \| . . . X O . O . X X X . . \| $$ \| . . . X O . . . . . . . . \| $$ ----------------------------[/go]

Author:	Cassandra [ Fri Sep 24, 2010 6:50 am ]
Post subject:	Re: L & D Series from cyberoro (5D PLUS) problem #180
Magicwand wrote: BLACK TO CAPTURE The main path isn't so difficult, is it ? Click Here To Show Diagram Code [go]$$Bcm1 $$ ----------------------------- $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . , . . . . . , . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . X X X . X . . \| $$ \| . . . . X X 2 O . . . X . \| $$ \| . . . , X O 1 . O O O X . \| $$ \| . . . X . O . . O X O X . \| $$ \| . . . X O . O . X X X . . \| $$ \| . . . X O . 3 . . . . . . \| $$ ----------------------------[/go]

Author:	Magicwand [ Fri Sep 24, 2010 7:03 am ]
Post subject:	Re: L & D Series from cyberoro (5D PLUS) problem #180
Cassandra wrote: Magicwand wrote: BLACK TO CAPTURE The main path isn't so difficult, is it ? Click Here To Show Diagram Code [go]$$Bcm1 $$ ----------------------------- $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . , . . . . . , . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . X X X . X . . \| $$ \| . . . . X X 2 O . . . X . \| $$ \| . . . , X O 1 . O O O X . \| $$ \| . . . X . O . . O X O X . \| $$ \| . . . X O . O . X X X . . \| $$ \| . . . X O . 3 . . . . . . \| $$ ----------------------------[/go] if 4 then what??? this problem gave me some hard time. there are not toomany variations but some moves are hard to see. Click Here To Show Diagram Code [go]$$Bcm1 $$ ----------------------------- $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . , . . . . . , . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . X X X . X . . \| $$ \| . . . . X X 2 O . . . X . \| $$ \| . . . , X O 1 . O O O X . \| $$ \| . . . X . O . . O X O X . \| $$ \| . . . X O . O 4 X X X . . \| $$ \| . . . X O . 3 . . . . . . \| $$ ----------------------------[/go]

Author:	Cassandra [ Fri Sep 24, 2010 8:02 am ]
Post subject:	Re: L & D Series from cyberoro (5D PLUS) problem #180
Click Here To Show Diagram Code [go]$$Bcm1 $$ ----------------------------- $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . , . . . . . , . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . X X X . X . . \| $$ \| . . . . X X 2 O . . . X . \| $$ \| . . . , X O 1 . O O O X . \| $$ \| . . . X . O 7 . O X O X . \| $$ \| . . . X O . O 4 X X X . . \| $$ \| . . . X O 6 3 5 . . . . . \| $$ ----------------------------[/go] There are problems, which are easier for weaker than for stronger players. One example is this "snowman" by Chô U (hidden, because this might be slightly off-topic here). From his 2006 book "Chô U no Tsume Go" Click Here To Show Diagram Code `[go]$$B $$ \| . . . . . . . . . . $$ \| . . . X X X X . . . $$ \| . . X . O O X . . . $$ \| . . X O . . O X . . $$ \| . . X O . . O X X . $$ \| . X O . . . . O X . $$ \| . X O . . . . O X . $$ \| . X . O . . O X X . $$ ----------------------[/go]` This problem is rated 4.5 stars out of 5, but there had been some low level SDK's coming up with a very elegant solution, not to be found in the book.

Author:	DIV [ Mon Sep 27, 2010 3:24 am ]
Post subject:	Re: L & D Series from cyberoro (5D PLUS) problem #180
Click Here To Show Diagram Code [go]$$Bcm1 $$ ----------------------------- $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . , . . . . . , . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . . . . . . . . \| $$ \| . . . . . . X X X . X . . \| $$ \| . . . . X X 2 O . . . X . \| $$ \| . . . , X O 1 . O O O X . \| $$ \| . . . X . O 7 . O X O X . \| $$ \| . . . X O . O 4 X X X . . \| $$ \| . . . X O 6 3 5 . . . . . \| $$ ----------------------------[/go] is this right? I have worked it through and can't seem to find it being correct. 8 at j1. can someone post the correct answer or message me with it?

Author:	cyclops [ Mon Sep 27, 2010 4:29 am ]
Post subject:	Re: L & D Series from cyberoro (5D PLUS) problem #180
@DIV: 9B@e3(atari),10W@f2,11B@h1 ( falsifies the eye there)

Author: Magicwand [ Tue Sep 28, 2010 2:48 am ]

Post subject: Re: L & D Series from cyberoro (5D PLUS) problem #180

DIV wrote:

can someone post the correct answer or message me with it?

i posted the question so i will give you correct answer.
white dies.

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

Click Here To Show Diagram Code: [go]$$Wcm1 $$ ----------------------------- $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . X X X . X . . | $$ | . . . . X X O O . . . X . | $$ | . . . , X O X . O O O X . | $$ | . . . X X O X . O X O X . | $$ | . . . X O 1 O O X X X . . | $$ | . . . X O O . 2 O . . . . | $$ ----------------------------[/go]

text book answer will be as below
[hide]

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

Author: ndkrempel [ Wed Oct 20, 2010 8:26 pm ]

Post subject: Re: L & D Series from cyberoro (5D PLUS) problem #180

To follow up on the above, it would be wrong to capture white 6. It would lead to ko, as in the following main line:

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

Click Here To Show Diagram Code: [go]$$Wcm8 $$ ----------------------------- $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . X X X . X . . | $$ | . . . . X X O O . . . X . | $$ | . . . , X O X . O O O X . | $$ | . . . X 4 O 2 . O X O X . | $$ | . . . X O . O O X X X 5 . | $$ | . . . X O 1 X X 3 X . . . | $$ ----------------------------[/go]

Click Here To Show Diagram Code: [go]$$Bcm13 $$ ----------------------------- $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . X X X . X . . | $$ | . . . . X X O O . . . X . | $$ | . . . , X O X . O O O X . | $$ | . . . X X O X . O X O X . | $$ | . . . X O . O O X X X O 3 | $$ | . . . X O O 4 1 O X . 2 . | $$ ----------------------------[/go]

After black's mistake at 7, the above sequence is unique (except 10 and 12 can be played in the other order.) Verifying this is left as an exercise to the reader...

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