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Offline rhwocns
 Post subject: A problem
Post #1 Posted: Tue Aug 30, 2022 4:35 am 
Dies in gote

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Rank: 3k in a local town
This is art. pretty good. top of my collection.

Click Here To Show Diagram Code
[go]$$c
$$ +---------------------------+
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . , . . . . . . |
$$ | . . . . O O O O . . . . . |
$$ | . . . O X X X X O . . . . |
$$ | . . . O X O O X O . . . . |
$$ | . . . O X . . X O . . . . |
$$ | . . . O X . . X O . . . . |
$$ | . . . O . . . . O . . . . |
$$ +---------------------------+[/go]
Black to

F1, H1, G1, E1.
or
F1, E1, G1, H1.

all stones are alive. and then, black's turn.
Click Here To Show Diagram Code
[go]$$
$$ . . . . . . . . . .
$$ . . . . . . . . . .
$$ . . . O O O O . . .
$$ . . O X X X X O . .
$$ . . O X O O X O . .
$$ . . O X . . X O . .
$$ . . O X . . X O . .
$$ . . O O X X O O . .
$$ -------------------[/go]

Code:
(;GM[1]FF[4]SZ[13]CA[UTF-8]AW[di][dj][dk][dl][dm][eh][fh][gh][hh][ii][ij][ik][il][im][fj][gj]AB[ei][ej][ek][el][hi][hj][hk][hl][gi][fi];B[fm](;W[hm];B[gm];W[em])(;W[em];B[gm];W[hm]))


by 권오민 5p
From his book 신기묘수


Last edited by rhwocns on Thu Sep 08, 2022 3:08 am, edited 7 times in total.
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Offline jlt
 Post subject: Re: A problem
Post #2 Posted: Tue Aug 30, 2022 10:35 am 
Gosei
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?

Click Here To Show Diagram Code
[go]$$c
$$ +---------------------------+
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . , . . . . . . |
$$ | . . . . O O O O . . . . . |
$$ | . . . O X X X X O . . . . |
$$ | . . . O X O O X O . . . . |
$$ | . . . O X . . X O . . . . |
$$ | . . . O X . . X O . . . . |
$$ | . . . O 2 1 3 . O . . . . |
$$ +---------------------------+[/go]
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Offline Cassandra
 Post subject: Re: A problem
Post #3 Posted: Tue Aug 30, 2022 10:53 am 
Lives in sente
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jlt wrote:
?

!!!

Click Here To Show Diagram Code
[go]$$c
$$ +---------------------------+
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . , . . . . . . |
$$ | . . . . O O O O . . . . . |
$$ | . . . O X X X X O . . . . |
$$ | . . . O X O O X O . . . . |
$$ | . . . O X . . X O . . . . |
$$ | . . . O X . . X O . . . . |
$$ | . . . O O X X 4 O . . . . |
$$ +---------------------------+[/go]

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The really most difficult Go problem ever: https://igohatsuyoron120.de/index.htm
Igo Hatsuyōron #120 (really solved by KataGo)
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Offline John Fairbairn
 Post subject: Re: A problem
Post #4 Posted: Tue Aug 30, 2022 10:56 am 
Oza

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This is the problem that famously stumped Yi Ch'ang-ho.
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Offline CDavis7M
 Post subject: Re: A problem
Post #5 Posted: Tue Aug 30, 2022 2:15 pm 
Lives in sente
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Universal go server handle: CDavis7M
Click Here To Show Diagram Code
[go]$$c
$$ +---------------------------+
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . , . . . . . . |
$$ | . . . . O O O O 1 . . . . |
$$ | . . . O X X X X O . . . . |
$$ | . . . O X O O X O . . . . |
$$ | . . . O X . . X O . . . . |
$$ | . . . O X . . X O . . . . |
$$ | . . . O . . . . O . . . . |
$$ +---------------------------+[/go]


I didn't get to 1 kyu on Fox for no reason.
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Offline Knotwilg
 Post subject: Re: A problem
Post #6 Posted: Tue Aug 30, 2022 3:39 pm 
Oza
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I also recognized this problem immediately. One of the most famous and incomprehensible go problems.
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Offline CDavis7M
 Post subject: Re: A problem
Post #7 Posted: Tue Aug 30, 2022 10:37 pm 
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rhwocns wrote:
by 권오민 5p
From his book 신기묘수

If you don't mind sharing, how did you come across the book? Did you purchase it online?
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Offline rhwocns
 Post subject: Re: A problem
Post #8 Posted: Wed Aug 31, 2022 3:17 am 
Dies in gote

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CDavis7M wrote:
If you don't mind sharing, how did you come across the book? Did you purchase it online?

This is a Korean book, but it's out of stock in Korea, so it's hard to find. there are occasional second-hand deals, but only in Korea. I don't have it either. sorry.


Last edited by rhwocns on Thu Sep 01, 2022 7:34 am, edited 1 time in total.
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Offline Kirby
 Post subject: Re: A problem
Post #9 Posted: Wed Aug 31, 2022 1:57 pm 
Honinbo

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I have the book:

Image


As you can see, the problem is on the front cover. There are 70 problems in total, with 281 pages of content. I have done a handful of problems from this book - usually the correct answer is not my first intuition.

It also has a CD, which I have never used. But upon closer inspection, I see that the CD says 인공지능 문제풀이 프로그램 - Artificial Intelligence Problem Solving Program. This book was before AlphaGo, but it might be interesting to check out.

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Offline Kirby
 Post subject: Re: A problem
Post #10 Posted: Wed Aug 31, 2022 2:06 pm 
Honinbo

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FWIW, I also have the second book:

Image


It also has 70 problems, but wraps up in 275 pages.

---

Regarding where to find the books, I still see them listed on Kyobo.

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