It is currently Thu Mar 28, 2024 7:40 am

All times are UTC - 8 hours [ DST ]




Post new topic Reply to topic  [ 4 posts ] 
Author Message
Offline
 Post subject: Dieter's ABC of mistakes - 5
Post #1 Posted: Thu Apr 01, 2021 8:15 am 
Oza
User avatar

Posts: 2408
Location: Ghent, Belgium
Liked others: 359
Was liked: 1019
Rank: KGS 2d OGS 1d Fox 4d
KGS: Artevelde
OGS: Knotwilg
Online playing schedule: UTC 18:00 - 22:00
Click Here To Show Diagram Code
[go]$$W Mistake 5
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X O . X . . . . . . . . . X X X X . |
$$ | . X O X . b c . . . . . X X O X . . X |
$$ | . X O X . O X . . , . O X O O O X X . |
$$ | . O X X X O X . . X X O O X O X O O . |
$$ | O . O O O O . . . X O O . . O X O . . |
$$ | . O . . . . . X X O X O . . O X O . . |
$$ | . . . . X O O X O O . . X . . X . . . |
$$ | . a . . X . X O . . . . . O X X X O . |
$$ | . X X , . . X O . O . . . O O X O . . |
$$ | . O X . . . X O . O X . . . . O O . . |
$$ | O . O X . . X X . X O . . . . . . . . |
$$ | . O O . . . . . . X O . . . . . . . . |
$$ | . . . . . . . . . X O . O . . . . . . |
$$ | . . . O . . X . O O X O . . . . . . . |
$$ | . . O , . . . . . , X X O O O O O O . |
$$ | . . O X . . X . . . . X X O X X X X . |
$$ | . X X . . . . . . . . . . X . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


White's left side group needs to pay attention to its eyespaces. Should it play ''a'', ''b'' or ''c''? White's choice lost another 9 points here.

Top
 Profile  
 
Offline
 Post subject: Re: Dieter's ABC of mistakes - 5
Post #2 Posted: Fri Apr 02, 2021 4:16 am 
Tengen
User avatar

Posts: 4844
Location: Mechanicsburg, PA
Liked others: 62
Was liked: 505
Rank: Wbaduk 7D
KGS: magicwand
Tygem: magicwand
Wbaduk: rlatkfkd
DGS: magicwand
OGS: magicwand
A will hurt group on left. B wont gain much needed eye. C is using opponent's weakness to gain eye space in sente.

_________________
"The more we think we know about
The greater the unknown"

Words by neil peart, music by geddy lee and alex lifeson

Top
 Profile  
 
Offline
 Post subject: Re: Dieter's ABC of mistakes - 5
Post #3 Posted: Fri Apr 02, 2021 8:58 am 
Lives in sente
User avatar

Posts: 914
Liked others: 391
Was liked: 162
Rank: German 2 dan
As far as I can see, there is no move on the left that will both secure a second eye and not make A10 or A11 sente. We should look very hard at the top.

The point about 'c' is that Black cannot cut at 'b'. But what happens then?

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


I don't think that Black could play :b2: at :w5:, as then the centre group doesn't look healthy:

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


Is this the right :w3:? What other resistance might Black try?

_________________
A good system naturally covers all corner cases without further effort.

Top
 Profile  
 
Offline
 Post subject: Re: Dieter's ABC of mistakes - 5
Post #4 Posted: Fri Apr 02, 2021 9:16 am 
Oza
User avatar

Posts: 2408
Location: Ghent, Belgium
Liked others: 359
Was liked: 1019
Rank: KGS 2d OGS 1d Fox 4d
KGS: Artevelde
OGS: Knotwilg
Online playing schedule: UTC 18:00 - 22:00
At least what I missed is this tesuji
Click Here To Show Diagram Code
[go]$$W Mistake 5
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X O 5 X 7 . . . . . . . . X X X X . |
$$ | . X O X 3 2 1 . . . . . X X O X . . X |
$$ | . X O X 4 O X . . , . O X O O O X X . |
$$ | . O X X X O X . . X X O O X O X O O . |
$$ | O . O O O O . . . X O O . . O X O . . |
$$ | . O . . . . . X X O X O . . O X O . . |
$$ | . . . . X O O X O O . . X . . X . . . |
$$ | . a . . X . X O . . . . . O X X X O . |
$$ | . X X , . . X O . O . . . O O X O . . |
$$ | . O X . . . X O . O X . . . . O O . . |
$$ | O . O X . . X X . X O . . . . . . . . |
$$ | . O O . . . . . . X O . . . . . . . . |
$$ | . . . . . . . . . X O . O . . . . . . |
$$ | . . . O . . X . O O X O . . . . . . . |
$$ | . . O , . . . . . , X X O O O O O O . |
$$ | . . O X . . X . . . . X X O X X X X . |
$$ | . X X . . . . . . . . . . X . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 8 hours [ DST ]


Who is online

Users browsing this forum: No registered users 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