Life In 19x19 :: Black to Play

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Black to Play http://www.lifein19x19.com/viewtopic.php?f=15&t=7493	Page 1 of 1

Author:	logan [ Wed Dec 26, 2012 10:24 pm ]
Post subject:	Black to Play
Click Here To Show Diagram Code `[go]$$Bm1 Black to play $$ \| . . . . . . . . . . . $$ \| . . . , . . . . . , . $$ \| . . . . . . . . . . . $$ \| . . . . . . . . . . . $$ \| . . . . . . . . . . . $$ \| . . X . . . . . . . . $$ \| . . . X X X . . . . . $$ \| . X X X O X . . . , . $$ \| . O O X O . X . X . . $$ \| . . . O . O . . . . . $$ \| . . . . . . . . . . . $$ ----------------------[/go]` I would like to see how you all evaluate this, then I'll show the source solution. I think you'll find it quite humorous...

Author:	speedchase [ Wed Dec 26, 2012 11:18 pm ]
Post subject:	Re: Black to Play
[quote="logan"] Click Here To Show Diagram Code `[go]$$Bm1 Black to play $$ \| . . . . . . . . . . . $$ \| . . . , . . . . . , . $$ \| . . . . . . . . . . . $$ \| . . . . . . . . . . . $$ \| . . . . . . . . . . . $$ \| . . X . . . . . . . . $$ \| . . . X X X . . . . . $$ \| . X X X O X . . . , . $$ \| 3 O O X O . X . X . . $$ \| . 1 2 O . O 4 5 . . . $$ \| . . . . . . . . . . . $$ ----------------------[/go]` this?

Author:	logan [ Wed Dec 26, 2012 11:43 pm ]
Post subject:	Re: Black to Play
What about after the throw-in? Does White have any useful forcing moves? Click Here To Show Diagram Code `[go]$$Bm1 Black to play $$ \| . . . . . . . . . . . $$ \| . . . , . . . . . , . $$ \| . . . . . . . . . . . $$ \| . . . . . . . . . . . $$ \| . . . . . . . . . . . $$ \| . . X . . . . . . . . $$ \| . . . X X X . . . . . $$ \| . X X X O X . . . , . $$ \| 3 O O X O . X . X . . $$ \| 4 1 2 O . O . . . . . $$ \| . . . . . . . . . . . $$ ----------------------[/go]`

Author:	jts [ Wed Dec 26, 2012 11:55 pm ]
Post subject:	Re: Black to Play
Click Here To Show Diagram Code `[go]$$Bm1 Black to play $$ \| . . . . . . . . . . . $$ \| . . . , . . . . . , . $$ \| . . . . . . . . . . . $$ \| . . . . . . . . . . . $$ \| . . . . . . . . . . . $$ \| . . X . . . . . . . . $$ \| . . . X X X . . . . . $$ \| . X X X O X . . . , . $$ \| 3 O O X O a X . X . . $$ \| 4 1 2 O . O 6 7 . . . $$ \| 5 . 9 . 8 . b . . . . $$ ----------------------[/go]` Click Here To Show Diagram Code `[go]$$Bm1 Black to play $$ \| . . . . . . . . . . . $$ \| . . . , . . . . . , . $$ \| . . . . . . . . . . . $$ \| . . . . . . . . . . . $$ \| . . . . . . . . . . . $$ \| . . X . . . . . . . . $$ \| . . . X X X . . . . . $$ \| . X X X O X . . . , . $$ \| 3 O O X O . X . X . . $$ \| 4 1 2 O . O 6 7 . . . $$ \| 5 . 8 . 9 . . . . . . $$ ----------------------[/go]` After w captures the four black stones and b throws in again, and the space above are miai.

Author: logan [ Thu Dec 27, 2012 2:16 pm ]

Post subject: Re: Black to Play

Right!

There are a couple of possible tricks up White's sleeve, and miai key points & a sacrifice Black has to find.

Click Here To Show Diagram Code: [go]$$Bm1 Solution 1, @ $$ | . . . . . . . . . . . $$ | . . . , . . . . . , . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . X . . . . . . . . $$ | . . . X X X . . . . . $$ | 0 X X X O X . . . , . $$ | 3 O O X O . X . X . . $$ | 4 1 2 O . O . . . . . $$ | 5 8 6 . 7 . . . . . . $$ ----------------------[/go]

Click Here To Show Diagram Code: [go]$$Bm11 Cont. 1, $$ | . . . . . . . . . . . $$ | . . . , . . . . . , . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . X . . . . . . . . $$ | . . . X X X . . . . . $$ | O X X X O X . . . , . $$ | 2 O O X O 4 X . X . . $$ | 1 . O O 3 O 5 . . . . $$ | . O O . X . . . . . . $$ ----------------------[/go]

Click Here To Show Diagram Code: [go]$$Bm1 Solution 2 $$ | . . . . . . . . . . . $$ | . . . , . . . . . , . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . X . . . . . . . . $$ | . . . X X X . . . . . $$ | 9 X X X O X . . . , . $$ | 3 O O X O . X . X . . $$ | 4 1 2 O . O . . . . . $$ | 5 0 7 8 6 . . . . . . $$ ----------------------[/go]

Click Here To Show Diagram Code: [go]$$Bm11 Cont. 1 $$ | . . . . . . . . . . . $$ | . . . , . . . . . , . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . . . . . . . . . . $$ | . . X . . . . . . . . $$ | . . . X X X . . . . . $$ | X X X X O X . . . , . $$ | X O O X O 4 X . X . . $$ | 1 X O O . O 2 3 . . . $$ | X O . O O . 5 . . . . $$ ----------------------[/go]

So let's see the book answer:

Author:	Alguien [ Thu Dec 27, 2012 2:44 pm ]
Post subject:	Re: Black to Play
One of the reasons I don't do go problems from anything not interactive.

Author:	TIM82 [ Thu Dec 27, 2012 2:44 pm ]
Post subject:	Re: Black to Play
Which book, if I may ask?

Author:	logan [ Thu Dec 27, 2012 11:47 pm ]
Post subject:	Re: Black to Play
TIM82 wrote: Which book, if I may ask? Essential L&D Vol. 4

Author:	Shaddy [ Thu Dec 27, 2012 11:54 pm ]
Post subject:	Re: Black to Play
If it's a 1-5d book, I don't see anything wrong with the book's answer. A 1-5d should be able to see all of those lines with only a little effort.

Author:	Alguien [ Fri Dec 28, 2012 1:06 am ]
Post subject:	Re: Black to Play
Shaddy wrote: If it's a 1-5d book, I don't see anything wrong with the book's answer. A 1-5d should be able to see all of those lines with only a little effort. Do you think someone who can see all those lines with little effort really needs the first move to be pointed out? Otherwise it's not a problem, it's a "look how beautiful are these lines" aesthetic construction.

Author:	Shaddy [ Fri Dec 28, 2012 1:12 pm ]
Post subject:	Re: Black to Play
It's possible to miss the first move and go off on a futile reading adventure with some other first move. I almost did that because I thought the first move was too obvious (I thought it'd be a harder problem), but I decided to check it anyway.

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