It is currently Sun Aug 25, 2019 6:49 am

All times are UTC - 8 hours [ DST ]




Post new topic Reply to topic  [ 10 posts ] 
Author Message
Offline
 Post subject: Life and Death Problems
Post #1 Posted: Sun Jan 27, 2019 1:39 am 
Dies in gote

Posts: 46
Liked others: 0
Was liked: 3
Rank: 4dan
KGS: CaiGY
Hello,

I've been trying some life and death problems on tom.com --- here's the link --- http://weiqi.tom.com/hubo/sihuoying_3.htm.

But I can't seem to be able to solve the 5 dan questions (last column). I think I can solve the middle one, but don't even know where to start for the 1st and last 5 dan question. If anyone can help, appreciate it. Thanks

Top
 Profile  
 
Offline
 Post subject: Re: Life and Death Problems
Post #2 Posted: Sun Jan 27, 2019 1:48 am 
Judan

Posts: 6018
Location: Cambridge, UK
Liked others: 342
Was liked: 3237
Rank: UK 4 dan
KGS: Uberdude 4d
OGS: Uberdude 7d
How to make diagrams
http://hiddema.nl/diagrammer/

Top
 Profile  
 
Offline
 Post subject: Re: Life and Death Problems
Post #3 Posted: Sun Jan 27, 2019 2:36 am 
Tengen

Posts: 4797
Liked others: 0
Was liked: 648
If shorthands do not reveal and confirm a solution, apply the method of regular tactical reading (at every decision, at least one confirming move or all moves reject; iterate backwards) until you find and confirm a solution. In particular, for the first move analyse next candidates until you find and verify a confirming move or else you verify all moves as rejecting. If solutions were suboptimal (inferior count, ko, seki etc.), you would need to also test for better solutions. You do not learn solving of difficult problems by asking for answers. Solve by yourself. In difficult problems, this can mean to analyse hundreds of variations during the decision-making of regular tactical reading. It does allow some simplifications if applicable, such as reversion.

Top
 Profile  
 
Online
 Post subject: Re: Life and Death Problems
Post #4 Posted: Sun Jan 27, 2019 3:15 am 
Lives in sente

Posts: 900
Location: UK
Liked others: 68
Was liked: 467
Rank: 5 dan
KGS: macelee
Uberdude wrote:


I almost forgot that set of L&D problems, 2200+ of them, all dan-level, all with solutions and brief comments (in Chinese). Great studying material for anyone serious about improvement.

It would be crazy to attempt to manually recreate the diagrams. A script to save the data would be quite easy (of course for personal use, rather than reuse the whole thing elsewhere).

Top
 Profile  
 
Offline
 Post subject: Re: Life and Death Problems
Post #5 Posted: Sun Jan 27, 2019 3:32 am 
Judan

Posts: 6018
Location: Cambridge, UK
Liked others: 342
Was liked: 3237
Rank: UK 4 dan
KGS: Uberdude 4d
OGS: Uberdude 7d
macelee wrote:
It would be crazy to attempt to manually recreate the diagrams.

I wasn't suggesting all of them, just the 1 he wants help on to be clear which one it is and facilitate discussion (e.g. coordinates, posting variations).

Top
 Profile  
 
Offline
 Post subject: Re: Life and Death Problems
Post #6 Posted: Sun Jan 27, 2019 3:33 am 
Dies in gote

Posts: 46
Liked others: 0
Was liked: 3
Rank: 4dan
KGS: CaiGY
Looked at the 2 problems for 1 hour plus, still cannot find the solution ...

Top
 Profile  
 
Offline
 Post subject: Re: Life and Death Problems
Post #7 Posted: Sun Jan 27, 2019 3:37 am 
Dies in gote

Posts: 46
Liked others: 0
Was liked: 3
Rank: 4dan
KGS: CaiGY
Uberdude wrote:
macelee wrote:
It would be crazy to attempt to manually recreate the diagrams.

I wasn't suggesting all of them, just the 1 he wants help on to be clear which one it is and facilitate discussion (e.g. coordinates, posting variations).



Its the diagram on the top right and bottom right-hand corner. I don't know how to transfer the diagram onto this website.

Top
 Profile  
 
Online
 Post subject: Re: Life and Death Problems
Post #8 Posted: Sun Jan 27, 2019 3:46 am 
Lives in sente

Posts: 900
Location: UK
Liked others: 68
Was liked: 467
Rank: 5 dan
KGS: macelee
CaiGengYang wrote:
Its the diagram on the top right and bottom right-hand corner. I don't know how to transfer the diagram onto this website.


Uberdude posted two links just to show you how to do diagram here.

About the top-right corner problem, I would start from the second line, gifting white a stone to capture, then playing first line to create a bending 3 eye-space which is sente - then there appears to be a ko fight.

Top
 Profile  
 
Offline
 Post subject: Re: Life and Death Problems
Post #9 Posted: Sun Jan 27, 2019 3:51 am 
Dies in gote

Posts: 46
Liked others: 0
Was liked: 3
Rank: 4dan
KGS: CaiGY
macelee wrote:
CaiGengYang wrote:
Its the diagram on the top right and bottom right-hand corner. I don't know how to transfer the diagram onto this website.


Uberdude posted two links just to show you how to do diagram here.

About the top-right corner problem, I would start from the second line, gifting white a stone to capture, then playing first line to create a bending 3 eye-space which is sente - then there appears to be a ko fight.



Yes, I managed to find that variation too. However, it results in a ko … I thought the question is looking for a clean survive without ko

Top
 Profile  
 
Offline
 Post subject: Re: Life and Death Problems
Post #10 Posted: Sun Jan 27, 2019 3:53 am 
Dies in gote

Posts: 46
Liked others: 0
Was liked: 3
Rank: 4dan
KGS: CaiGY
The last question, bottom right hand corner --- I also could only get a ko fight solution, not sure if its correct

Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 10 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