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Offline Alakazam
 Post subject: Difficult Tsumego
Post #1 Posted: Wed Jul 28, 2010 12:29 pm 
Dies with sente
User avatar

Posts: 86
Location: Toronto, ON, CA
Liked others: 18
Was liked: 16
Rank: CGA 6 Dan
GD Posts: 498
KGS: Invader, gilgil
Online playing schedule: Teaching, tournaments, and CGL (UofT)
Here's a Dan level Tsumego for you guys. I found it a bit tricky.

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


Black to do stuff

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Experienced Go Teacher: http://ygami.blogspot.ca/2014/02/teaching.html
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Offline Marcus
 Post subject: Re: Difficult Tsumego
Post #2 Posted: Wed Jul 28, 2010 1:03 pm 
Gosei

Posts: 1387
Liked others: 139
Was liked: 111
GD Posts: 209
KGS: Marcus316
This position looks familiar, but I don't have too much time to read through it right now. I have a line that looks like it could be good, though.

EDIT: I'm already finding other lines I need to handle with my solution, but it's fun to read out ... thanks Alakazam.

I'm currently thinking along these lines:

Click Here To Show Diagram Code
[go]$$c Black to play
$$ . . . X X X X X . |
$$ . . . X O . . X . |
$$ . . . X O . X O X |
$$ . . X . O . 7 O 2 |
$$ . . X O O . 5 O 1 |
$$ . . . . . . 4 3 6 |
$$ -----------------[/go]


Click Here To Show Diagram Code
[go]$$c Black to play
$$ . . . X X X X X . |
$$ . . . X O . . X . |
$$ . . . X O . X O X |
$$ . . X . O . B O W |
$$ . . X O O 8 B O C |
$$ . . . . . 9 W C W |
$$ -----------------[/go]


I haven't looked at variations yet to see if there's a better line, but this looks promising.
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Offline Magicwand
 Post subject: Re: Difficult Tsumego
Post #3 Posted: Wed Jul 28, 2010 1:12 pm 
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
Marcus wrote:
This position looks familiar, but I don't have too much time to read through it right now. I have a line that looks like it could be good, though.

EDIT: I'm already finding other lines I need to handle with my solution, but it's fun to read out ... thanks Alakazam.

I'm currently thinking along these lines:

Click Here To Show Diagram Code
[go]$$c Black to play
$$ . . . X X X X X . |
$$ . . . X O . . X . |
$$ . . . X O . X O X |
$$ . . X . O . 7 O 2 |
$$ . . X O O . 5 O 1 |
$$ . . . . . . 4 3 6 |
$$ -----------------[/go]


Click Here To Show Diagram Code
[go]$$c Black to play
$$ . . . X X X X X . |
$$ . . . X O . . X . |
$$ . . . X O . X O X |
$$ . . X . O . B O W |
$$ . . X O O 8 B O C |
$$ . . . . . 9 W C W |
$$ -----------------[/go]


I haven't looked at variations yet to see if there's a better line, but this looks promising.


i dont think that is the answer.
Click Here To Show Diagram Code
[go]$$c Black to play
$$ . . . X X X X X . |
$$ . . . X O . . X . |
$$ . . . X O . X O X |
$$ . . X . O . . O 2 |
$$ . . X O O . 4 O 1 |
$$ . . . . . . . 3 . |
$$ -----------------[/go]

_________________
"The more we think we know about
The greater the unknown"
Words by neil peart, music by geddy lee and alex lifeson
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Offline Marcus
 Post subject: Re: Difficult Tsumego
Post #4 Posted: Wed Jul 28, 2010 1:21 pm 
Gosei

Posts: 1387
Liked others: 139
Was liked: 111
GD Posts: 209
KGS: Marcus316
Magicwand wrote:
Marcus wrote:
This position looks familiar, but I don't have too much time to read through it right now. I have a line that looks like it could be good, though.

EDIT: I'm already finding other lines I need to handle with my solution, but it's fun to read out ... thanks Alakazam.

I'm currently thinking along these lines:

Click Here To Show Diagram Code
[go]$$c Black to play
$$ . . . X X X X X . |
$$ . . . X O . . X . |
$$ . . . X O . X O X |
$$ . . X . O . 7 O 2 |
$$ . . X O O . 5 O 1 |
$$ . . . . . . 4 3 6 |
$$ -----------------[/go]


Click Here To Show Diagram Code
[go]$$c Black to play
$$ . . . X X X X X . |
$$ . . . X O . . X . |
$$ . . . X O . X O X |
$$ . . X . O . B O W |
$$ . . X O O 8 B O C |
$$ . . . . . 9 W C W |
$$ -----------------[/go]


I haven't looked at variations yet to see if there's a better line, but this looks promising.


i dont think that is the answer.
Click Here To Show Diagram Code
[go]$$c Black to play
$$ . . . X X X X X . |
$$ . . . X O . . X . |
$$ . . . X O . X O X |
$$ . . X . O . . O 2 |
$$ . . X O O . 4 O 1 |
$$ . . . . . . . 3 . |
$$ -----------------[/go]


@Magicwand
Yup, I found that refutation, but I have to go pick up my son in a few minutes, so I don't have time to think about it more.
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Offline Alakazam
 Post subject: Re: Difficult Tsumego
Post #5 Posted: Wed Jul 28, 2010 1:51 pm 
Dies with sente
User avatar

Posts: 86
Location: Toronto, ON, CA
Liked others: 18
Was liked: 16
Rank: CGA 6 Dan
GD Posts: 498
KGS: Invader, gilgil
Online playing schedule: Teaching, tournaments, and CGL (UofT)
Isn't it tricky? ;p

It looks like an easy problem, but it took me unexpectedly long, at least 5 mins.

_________________
Experienced Go Teacher: http://ygami.blogspot.ca/2014/02/teaching.html
Check out my Go content, fiction stories, anime talk and more @ http://ygami.blogspot.ca
"Go Explained" series! http://ygami.blogspot.ca/search/label/go%20explained
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Offline Alakazam
 Post subject: Re: Difficult Tsumego
Post #6 Posted: Wed Jul 28, 2010 11:36 pm 
Dies with sente
User avatar

Posts: 86
Location: Toronto, ON, CA
Liked others: 18
Was liked: 16
Rank: CGA 6 Dan
GD Posts: 498
KGS: Invader, gilgil
Online playing schedule: Teaching, tournaments, and CGL (UofT)
*Ahem.....

There is no answer...

XD

I thought I solved it, but then someone asked me to tell them, and I said not yet. Then I went to look at it again to make sure, and I found a problem. I tried for a whole longer and failed. I had a 9d on KGS try, and fail... There is no solution, sorry! My book was from King's Baduk Center, where I studied for 5 months in korea, and all the other problems have solutions...

Hahah

For those of us who worked it out in our heads only, we gained something anyway...! Not a waste of time.

_________________
Experienced Go Teacher: http://ygami.blogspot.ca/2014/02/teaching.html
Check out my Go content, fiction stories, anime talk and more @ http://ygami.blogspot.ca
"Go Explained" series! http://ygami.blogspot.ca/search/label/go%20explained
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Offline logan
 Post subject: Re: Difficult Tsumego
Post #7 Posted: Thu Jul 29, 2010 2:02 am 
Lives in gote

Posts: 641
Liked others: 142
Was liked: 438
GD Posts: 9
Alakazam wrote:
*Ahem.....

There is no answer...

XD

I thought I solved it, but then someone asked me to tell them, and I said not yet. Then I went to look at it again to make sure, and I found a problem. I tried for a whole longer and failed. I had a 9d on KGS try, and fail... There is no solution, sorry! My book was from King's Baduk Center, where I studied for 5 months in korea, and all the other problems have solutions...

Hahah

For those of us who worked it out in our heads only, we gained something anyway...! Not a waste of time.

Tricky indeed.
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Offline unkx80
 Post subject: Re: Difficult Tsumego
Post #8 Posted: Thu Jul 29, 2010 8:13 am 
Lives with ko

Posts: 257
Location: Singapore
Liked others: 13
Was liked: 30
Rank: Dan player
Late last night I took a look at that problem, and never found a solution. I thought, I must have been too tired.

I modified the problem a little bit, and it is shown below. There should be a solution to this problem, although I don't know whether the solution is unique.

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


Alakazam, how would you rate this problem?

_________________
My homepages: http://senseis.xmp.net/?Unkx80 and http://yeefan.sg/.
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Offline Magicwand
 Post subject: Re: Difficult Tsumego
Post #9 Posted: Thu Jul 29, 2010 8:27 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
unkx80 wrote:
Late last night I took a look at that problem, and never found a solution. I thought, I must have been too tired.

I modified the problem a little bit, and it is shown below. There should be a solution to this problem, although I don't know whether the solution is unique.

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


Alakazam, how would you rate this problem?


i hope this is not another problem without answer...
i still dont see any logical answers... :evil: :evil:

_________________
"The more we think we know about
The greater the unknown"
Words by neil peart, music by geddy lee and alex lifeson
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Offline Kirby
 Post subject: Re: Difficult Tsumego
Post #10 Posted: Thu Jul 29, 2010 9:52 am 
Honinbo

Posts: 9552
Liked others: 1602
Was liked: 1712
KGS: Kirby
Tygem: 커비라고해
Magicwand wrote:
unkx80 wrote:
Late last night I took a look at that problem, and never found a solution. I thought, I must have been too tired.

I modified the problem a little bit, and it is shown below. There should be a solution to this problem, although I don't know whether the solution is unique.

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


Alakazam, how would you rate this problem?


i hope this is not another problem without answer...
i still dont see any logical answers... :evil: :evil:



Click Here To Show Diagram Code
[go]$$c Black to play
$$ . . . . . . . . . |
$$ . . . . . . X . . |
$$ . . . X X X . X . |
$$ . . . X O X 0 X . |
$$ . . . X O 8 X O X |
$$ . X . X O 5 4 O 2 |
$$ . . X O O 7 3 O 1 |
$$ . . . 9 . . . . 6 |
$$ -----------------[/go]


Click Here To Show Diagram Code
[go]$$c Black to play
$$ . . . . . . . . . |
$$ . . . . . . X . . |
$$ . . . X X X . X . |
$$ . . . X O X O X . |
$$ . . . X O O 2 O X |
$$ . X . X O X O O O |
$$ . . X O O X X O . |
$$ . . . X 1 3 . . O |
$$ -----------------[/go]

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be immersed
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Offline unkx80
 Post subject: Re: Difficult Tsumego
Post #11 Posted: Thu Jul 29, 2010 11:39 pm 
Lives with ko

Posts: 257
Location: Singapore
Liked others: 13
Was liked: 30
Rank: Dan player
Kirby's solution is exactly what I have in mind.

_________________
My homepages: http://senseis.xmp.net/?Unkx80 and http://yeefan.sg/.
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