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Re: The nearly minimal problem

Posted: Mon Dec 22, 2014 11:27 am
by fanfan
Charlie wrote:Er... I still don't get it. For instance, the problem doesn't say that you have to capture the black stone, only make a living group that happens to have a stone at 1-1...
How do you expect to put a white stone on the 1-1 without capturing the black stone which is already on the 1-1?

Re: The nearly minimal problem

Posted: Mon Dec 22, 2014 11:38 am
by fanfan
@Charlie
Click Here To Show Diagram Code
[go]$$B
$$ ------------
$$ | 1 . . . . .
$$ | . 2 5 . . .
$$ | . 4 3 . . .
$$ | . 7 6 . . .
$$ | . . . . . .
$$ | . . . . . .[/go]
@oca
Click Here To Show Diagram Code
[go]$$B
$$ ------------
$$ | X O . . . .
$$ | . O X 3 . .
$$ | . O X 2 . .
$$ | . X O . . .
$$ | . 1 . . . .
$$ | . . . . . .[/go]

Re: The nearly minimal problem

Posted: Mon Dec 22, 2014 2:24 pm
by MMaestro
@fanfan:

For that position you end up with, I recommend looking at gengen gokyo

http://eidogo.com/#4rmBZ5MFq

Re: The nearly minimal problem

Posted: Mon Dec 22, 2014 3:31 pm
by fanfan
Hello,

Don't forget that White has to fill the 1-1 point with a white stone to claim victory. That means that if White just try to live on the edge, he has to make 3 eyes (the one at the 1-1 point that he will fill, and two other eyes to live)!

Re: The nearly minimal problem

Posted: Mon Dec 22, 2014 4:16 pm
by MMaestro
Ah I didn't catch that. In that case though, the 3-3 point seems fine:

http://eidogo.com/#Coif89KX

Posted: Mon Dec 22, 2014 8:24 pm
by EdLee
fanfan wrote:Forget the word "Beginners". I used the term just to introduce the problem.
It's a key word in your original phrasing. :)
fanfan wrote:I agree that it is not the first thing to show to a beginner.
It's not even among the first 100 things to show a beginner. :)

Re: The nearly minimal problem

Posted: Tue Dec 23, 2014 12:05 am
by fanfan
EdLee wrote:It's not even among the first 100 things to show a beginner. :)
Just a sure way of getting a free drink.

@MMaestro
Click Here To Show Diagram Code
[go]$$B
$$ ------------
$$ | 1 . . . . .
$$ | . 3 . . . .
$$ | . . 2 . . .
$$ | . . . . . .
$$ | . . . . . .
$$ | . . . . . .[/go]

Re: The nearly minimal problem

Posted: Tue Dec 23, 2014 12:40 am
by Charlie
And what's wrong with...
Click Here To Show Diagram Code
[go]$$B
$$ ------------
$$ | 1 . . . . .
$$ | . 2 5 . . .
$$ | . 4 3 . . .
$$ | . 7 6 . . .
$$ | . 9 8 . . .
$$ | . 0 . . . .[/go]
Or even playing atari directly at :w9: ?

Call me a beginner, I know this isn't pretty, but I cannot believe that white can't get out. The task was to make a living group.

Re: The nearly minimal problem

Posted: Tue Dec 23, 2014 1:19 am
by fanfan
Charlie wrote: Call me a beginner, I know this isn't pretty, but I cannot believe that white can't get out. The task was to make a living group.
Click Here To Show Diagram Code
[go]$$B
$$ ------------
$$ | X 1 . . . .
$$ | . O X . . .
$$ | . O X . . .
$$ | . X O . . .
$$ | . X O . . .
$$ | . O . . . .[/go]
It seems that Black can live in the corner or escape now. White failed.

Note that I am like you: I don"t know the answer to this problem. I posted it hoping some of you will solve it.

Posted: Tue Dec 23, 2014 1:44 am
by EdLee
fanfan wrote:Just a sure way of getting a free drink.
Oh. You mean swindle.

Re: The nearly minimal problem

Posted: Tue Dec 23, 2014 1:45 am
by Charlie
Ah. Sorry - I was thinking of :w2: as the 1-1 point, not 2-2. I shouldn't post on forums while programming...

Re: The nearly minimal problem

Posted: Tue Dec 23, 2014 2:18 am
by MMaestro

Re: The nearly minimal problem

Posted: Tue Dec 23, 2014 2:53 am
by fanfan
MMaestro wrote:@fanfan
http://eidogo.com/#1IU7Nhf2j
Click Here To Show Diagram Code
[go]$$B
$$ --------------
$$ | X . . . . . .
$$ | . X O . . . .
$$ | . 1 O . . . .
$$ | . . . . . . .
$$ | . . . . . . .
$$ | . . . . . . .
$$ | . . . . . . .[/go]

Re:

Posted: Tue Dec 23, 2014 2:55 am
by fanfan
EdLee wrote:Oh. You mean swindle.
I'm not like that. They get a free drink in return too.

Posted: Tue Dec 23, 2014 3:02 am
by EdLee
fanfan wrote:I'm not like that. They get a free drink in return too.
Oh, good. The reader has to read a bit between the lines. :)