It is currently Tue Apr 16, 2024 12:28 pm

All times are UTC - 8 hours [ DST ]




Post new topic Reply to topic  [ 7 posts ] 
Author Message
Offline
 Post subject: Tsumego from your games
Post #1 Posted: Fri Feb 03, 2017 6:11 pm 
Beginner

Posts: 7
Liked others: 0
Was liked: 1
Rank: KGS 1d
KGS: jussius
How about a thread where we post tsumego from our own games for others to solve? Of course it doesn't have to be exactly same as in your game. Feel free to modify the positions if it makes them more suitable for tsumego, or you can post situations that could have happened but in the end never did.

I'll start with a rather tricky situation from my game. In the actual game I was trying to read what happens after black plays 1. I thought black could probably get a ko without steps so I ended up protecting before black had the change to play 1. But after the game I analyzed the situation in more detail and it turns out maybe white isn't in any real danger here. Can you find a way for white to win the semeai?

Click Here To Show Diagram Code
[go]$$c White to win the semeai
$$ . . . . . . . . . . . . . . |
$$ . . . . . . . . . . X . . . |
$$ . . . . X . . . . . . . . . |
$$ . . . . . . . O O . . . . . |
$$ . . O . . . X X O X X X . . |
$$ . . . X X X X O O X O X . . |
$$ . O X X O O X O X O O O X . |
$$ . O O O . O O X X 1 . . O . |
$$ . . X . O . X . . . . . . . |
$$ . --------------------------[/go]


P.S.
I'm kinda new here. Is this the right sub-forum for this? Or should it be in General Go Chat or Amateurs

Top
 Profile  
 
Offline
 Post subject:
Post #2 Posted: Fri Feb 03, 2017 6:35 pm 
Honinbo
User avatar

Posts: 8859
Location: Santa Barbara, CA
Liked others: 349
Was liked: 2076
GD Posts: 312
Hi jussius,

Thanks for starting this thread.
Seems a good place ( there are grey areas :) )
Click Here To Show Diagram Code
[go]$$
$$ . . . . . . . . . . . |
$$ . . . . . . . . X . . |
$$ . . . O O O X X X . . |
$$ . O . . O X O O O X . |
$$ . . O O X X 1 . . O . |
$$ . O . X . . . . . . . |
$$-----------------------[/go]

One way W can kill himself:
Click Here To Show Diagram Code
[go]$$ :b7: @ :bc: , :w8: @ :b3: , :w10: @ :bc:
$$ . . . . . . . . . . . |
$$ . . . . . . . . X . . |
$$ . . . O O O X X X 2 6 |
$$ . O . . O X O O O B 3 |
$$ . . O O X X 1 9 5 O 4 |
$$ . O . X . . . . . . . |
$$ ----------------------[/go]
Click Here To Show Diagram Code
[go]$$Bm11
$$ . . . . . . . . . . . |
$$ . . . . . . . . X 1 . |
$$ . . . O O O X X X O O |
$$ . O . . O X O O O O O |
$$ . . O O X X X X X O O |
$$ . O . X . . . . . . . |
$$ ----------------------[/go]
Hmm, how about:
Click Here To Show Diagram Code
[go]$$
$$ . . . . . . . . . . . |
$$ . . . . . . . . X . . |
$$ . . . O O O X X X . . |
$$ . O . . O X O O O X . |
$$ . . O O X X 1 . . O . |
$$ . O . X . . . 2 . . . |
$$ ----------------------[/go]
If :b3: hane:
Click Here To Show Diagram Code
[go]$$
$$ . . . . . . . . . . . |
$$ . . . . . . . . X . . |
$$ . . . O O O X X X . . |
$$ . O . . O X O O O X . |
$$ . . O O X X 1 4 . O 3 |
$$ . O . X . . 6 2 . 5 . |
$$ ----------------------[/go]

Top
 Profile  
 
Offline
 Post subject: Re: Tsumego from your games
Post #3 Posted: Fri Feb 03, 2017 7:19 pm 
Lives in gote
User avatar

Posts: 603
Liked others: 43
Was liked: 139
Rank: 6-7k KGS
My first thought was:
Click Here To Show Diagram Code
[go]$$
$$ . . . . . . . . . . . . . . |
$$ . . . . . . . . . . . X . . |
$$ . . . . . . O O O X X X b . |
$$ . . . . O . . O X O O O X . |
$$ . O O O . O O X X 1 a . O . |
$$ . . X . O . X . . . . 2 . . |
$$ -----------------------------[/go]


Threatening both a and b. But then I realized Black should play:

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


Is there something better than:

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


:w8: at S3

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


Now it's going to depend on the rest of the board.


I'm likely missing something, of course. Your position seems a bit different from the actual game position.

Top
 Profile  
 
Offline
 Post subject:
Post #4 Posted: Fri Feb 03, 2017 7:32 pm 
Honinbo
User avatar

Posts: 8859
Location: Santa Barbara, CA
Liked others: 349
Was liked: 2076
GD Posts: 312
Hi Fedya,
Thanks for the vars. If the outside libs are a problem,
then just add enough stones to maintain the "essence" of the original shape. :)

In this var:
Quote:
Click Here To Show Diagram Code
[go]$$B
$$ . . . . . . . . . . . |
$$ . . . . . . . . 4 3 . |
$$ . . . . . . . . X 2 . |
$$ . . . O O O X X X O . |
$$ . O . . O X O O O O O |
$$ . . O O X X X X X O . |
$$ . O . X . . . X O 1 . |
$$ -----------------------[/go]
Instead, B probably needs to turn at :b1: :
Click Here To Show Diagram Code
[go]$$B :w8: @ :w4: (1-step?) Ko
$$ . . . . . . . . . . . |
$$ . . . . . . . . X 1 3 |
$$ . . . O O O X X X O 7 |
$$ . O . . O X O O O O O |
$$ . . O O X X X X X O . |
$$ . O 6 X 4 5 . X O 2 . |
$$ -----------------------[/go]

Top
 Profile  
 
Offline
 Post subject: Re: Tsumego from your games
Post #5 Posted: Fri Feb 03, 2017 8:05 pm 
Beginner

Posts: 7
Liked others: 0
Was liked: 1
Rank: KGS 1d
KGS: jussius
Hi EdLee! Nice job, jumping down should be the correct move for white, and your variation is one way black could play, to get corner in sente. But if black is really serious about killing white, he can still force a (somewhat heavy) two step ko after white's jump.

In your "white kills himself" variation, black 3 is actually a mistake after which white can live unconditionally.

Top
 Profile  
 
Offline
 Post subject: Re: Tsumego from your games
Post #6 Posted: Sat Feb 04, 2017 1:23 pm 
Lives in gote
User avatar

Posts: 603
Liked others: 43
Was liked: 139
Rank: 6-7k KGS
Ed, I was thinking this:

Click Here To Show Diagram Code
[go]$$B White does win the capturing race, right?
$$ . . . . . . . . . . . |
$$ . . . . . . . . X 1 3 |
$$ . . . O O O X X X O . |
$$ . O . . O X O O O O O |
$$ . . O O X X X X X O . |
$$ . O . X . 4 . X O 2 . |
$$ -----------------------[/go]

Top
 Profile  
 
Offline
 Post subject:
Post #7 Posted: Sat Feb 04, 2017 1:54 pm 
Honinbo
User avatar

Posts: 8859
Location: Santa Barbara, CA
Liked others: 349
Was liked: 2076
GD Posts: 312
Hi Fedya,
Quote:
Click Here To Show Diagram Code
[go]$$B
$$ . . . . . . . . . . . |
$$ . . . . . . . . X 1 3 |
$$ . . . O O O X X X O . |
$$ . O . . O X O O O O O |
$$ . . O O X X X X X O . |
$$ . O . X . 4 . X O 2 . |
$$ -----------------------[/go]
Yes, W wins, thanks. :)

Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 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