It is currently Sun May 04, 2025 8:28 am

View unanswered posts | View active topics View unread posts | View new posts | View your posts


Board index » Improve Your Game » Study Group

All times are UTC - 8 hours [ DST ]



Post new topic Reply to topic  Page 1 of 1
  [ 4 posts ] 
  Print view Previous topic | Next topic 
Author Message
Offline cyclops
 Post subject: 501 tesuji problems #90 in error?
Post #1 Posted: Thu Aug 22, 2013 5:08 pm 
Lives in sente
User avatar

Posts: 801
Location: Amsterdam (NL)
Liked others: 353
Was liked: 107
Rank: KGS 7 kyu forever
GD Posts: 460
By Richard Bozulich, a great problem book for learning, recognizing and categorizing tesuji.
How can the black stones live in the corner?
Click Here To Show Diagram Code
[go]$$Bc problem #90, black to live
$$ +-------------------+
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ | . . , . . . , . . |
$$ | . . . . . . . . . |
$$ | . O O . , . . . . |
$$ | . . X O O O . . . |
$$ | . . X X X O , O . |
$$ | . . . O . X O . . |
$$ | . . . . X . . . . |
$$ +-------------------+[/go]


book's answers

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


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


I think b cannot live unconditionally and that the book is wrong
Click Here To Show Diagram Code
[go]$$Bc my resistance
$$ +-------------------+
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ | . . , . . . , . . |
$$ | . . . . . . . . . |
$$ | . O O . , . . . . |
$$ | . . X O O O . . . |
$$ | . 5 X X X O , O . |
$$ | 1 4 2 O 3 X O . . |
$$ | . . 6 . X . . . . |
$$ +-------------------+[/go]


If they postpone the ko this results eventually in:

Click Here To Show Diagram Code
[go]$$Bc results in mannen ko
$$ +-------------------+
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ | . . , . . . , . . |
$$ | . . . . . . . . . |
$$ | . O O . , . . . . |
$$ | O O X O O O . . . |
$$ | X 5 X X X O , O . |
$$ | 1 4 2 O 3 X O . . |
$$ | . . 6 . X O O . . |
$$ +-------------------+[/go]

_________________
I think I am so I think I am.
Top
 Profile  
 
Offline illluck
 Post subject: Re: 501 tesuji problems #90 in error?
Post #2 Posted: Thu Aug 22, 2013 5:27 pm 
Lives in sente

Posts: 1223
Liked others: 738
Was liked: 239
Rank: OGS 2d
KGS: illluck
Tygem: Trickprey
OGS: illluck
My reading is terrible for sure (couldn't solve this at all), but the resistance doesn't work:
Click Here To Show Diagram Code
[go]$$Bc
$$ +-------------------+
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
$$ | . . , . . . , . . |
$$ | . . . . . . . . . |
$$ | . O O . , . . . . |
$$ | . . X O O O . . . |
$$ | 9 5 X X X O , O . |
$$ | 1 4 2 O 3 X O . . |
$$ | 8 7 6 . X . . . . |
$$ +-------------------+[/go]

This post by illluck was liked by 3 people: frankie99, RBerenguel, Sverre
Top
 Profile  
 
Offline Mike Novack
 Post subject: Re: 501 tesuji problems #90 in error?
Post #3 Posted: Thu Aug 22, 2013 5:39 pm 
Lives in sente

Posts: 1045
Liked others: 0
Was liked: 182
What ko?

Black 7 at B1
White 8 at A1 (forced)
Black 9 connects at A3 and with three outside liberties will be able to play D1 to kill the white stones.

This post by Mike Novack was liked by: Sverre
Top
 Profile  
 
Offline cyclops
 Post subject: Re: 501 tesuji problems #90 in error?
Post #4 Posted: Fri Aug 23, 2013 2:40 am 
Lives in sente
User avatar

Posts: 801
Location: Amsterdam (NL)
Liked others: 353
Was liked: 107
Rank: KGS 7 kyu forever
GD Posts: 460
OK, I am convinced. ( I was 99% sure that I was correct, what a failure :oops: )

_________________
I think I am so I think I am.
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 1
  [ 4 posts ] 

Board index » Improve Your Game » Study Group

All times are UTC - 8 hours [ DST ]

Who is online

Users browsing this forum: Bing [Bot] and 1 guest

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group