Life In 19x19
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I love this tesuji
http://www.lifein19x19.com/viewtopic.php?f=15&t=4296		 Page 1 of 1
Author:  lorill [ Wed Jul 20, 2011 12:11 pm ]
Post subject:  I love this tesuji
Click Here To Show Diagram Code
[go]$$
$$ --------------------
$$ | . . . O . . . . . .
$$ | . . O 2 O X X . . .
$$ | . O 1 O X O O . X X
$$ | O X X O X O X X X O
$$ | . O X O X X O O O O
$$ | O . X O X . X . O X
$$ | O X X X X X O O O X
$$ | . O O X . O X O . .
$$ | . O . O O O X O X X
$$ | . O O O O X X O O X[/go]


This happened in my latest game against an 5k on tygem. White was careless and connected at :w2:. Black to play and win something.
Author:  Kirby [ Wed Jul 20, 2011 12:20 pm ]
Post subject:  Re: I love this tesuji
Click Here To Show Diagram Code
[go]$$
$$ --------------------
$$ | . 7 . O . . . . . .
$$ | 5 3 O 2 O X X . . .
$$ | 4 O 1 O X O O . X X
$$ | O X X O X O X X X O
$$ | 6 O X O X X O O O O
$$ | O . X O X . X . O X
$$ | O X X X X X O O O X
$$ | . O O X . O X O . .
$$ | . O . O O O X O X X
$$ | . O O O O X X O O X[/go]
Author:  lorill [ Wed Jul 20, 2011 12:25 pm ]
Post subject:  Re: I love this tesuji
@kirby: 5 is useless, but that's it.
Author:  Kirby [ Wed Jul 20, 2011 12:27 pm ]
Post subject:  Re: I love this tesuji
lorill wrote:
@kirby: 5 is useless, but that's it.


5 is worth a point, no? If white plays there, black doesn't get the point in the corner.
Author:  lorill [ Wed Jul 20, 2011 12:34 pm ]
Post subject:  Re: I love this tesuji
Oh right, even more than one point, as black doesn't need to capture there. So, 4 points if i count well.

I missed that, thanks!
Author:  Kirby [ Wed Jul 20, 2011 12:57 pm ]
Post subject:  Re: I love this tesuji
lorill wrote:
Oh right, even more than one point, as black doesn't need to capture there. So, 4 points if i count well.

I missed that, thanks!


Ah, hahaha. It is worth more than one point, isn't it?

Thanks for pointing that out.
Author:  Numsgil [ Wed Jul 20, 2011 1:01 pm ]
Post subject:  Re: I love this tesuji
Click Here To Show Diagram Code
[go]$$
$$ --------------------
$$ | . . . O . . . . . .
$$ | 4 3 O 2 O X X . . .
$$ | . O 1 O X O O . X X
$$ | O X X O X O X X X O
$$ | . O X O X X O O O O
$$ | O . X O X . X . O X
$$ | O X X X X X O O O X
$$ | . O O X . O X O . .
$$ | . O . O O O X O X X
$$ | . O O O O X X O O X[/go]


Ko, no?

edit: answered my own question :P:

Click Here To Show Diagram Code
[go]$$
$$ --------------------
$$ | . 5 . O 9 7 . . . .
$$ | 4 3 O 2 O X X . . .
$$ | 6 O 1 O X O O . X X
$$ | O X X O X O X X X O
$$ | 8 O X O X X O O O O
$$ | O . X O X . X . O X
$$ | O X X X X X O O O X
$$ | . O O X . O X O . .
$$ | . O . O O O X O X X
$$ | . O O O O X X O O X[/go]
Author:  Chew Terr [ Wed Jul 20, 2011 1:05 pm ]
Post subject:  Re: I love this tesuji
Numsgil:
Click Here To Show Diagram Code
[go]$$
$$ --------------------
$$ | . 5 . O . 7 . . . .
$$ | 4 3 O 2 O X X . . .
$$ | 6 O 1 O X O O . X X
$$ | O X X O X O X X X O
$$ | . O X O X X O O O O
$$ | O . X O X . X . O X
$$ | O X X X X X O O O X
$$ | . O O X . O X O . .
$$ | . O . O O O X O X X
$$ | . O O O O X X O O X[/go]

Nope, don't think so. May be a bit better for white, though.
Author:  Kirby [ Wed Jul 20, 2011 1:05 pm ]
Post subject:  Re: I love this tesuji
Numsgil wrote:
Click Here To Show Diagram Code
[go]$$
$$ --------------------
$$ | . . . O . . . . . .
$$ | 4 3 O 2 O X X . . .
$$ | . O 1 O X O O . X X
$$ | O X X O X O X X X O
$$ | . O X O X X O O O O
$$ | O . X O X . X . O X
$$ | O X X X X X O O O X
$$ | . O O X . O X O . .
$$ | . O . O O O X O X X
$$ | . O O O O X X O O X[/go]


Ko, no?

edit: answered my own question :P:

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



If white has ko threats, I suppose he could consider playing that way to prevent black from getting the points that are referenced in the previous couple of posts.
Author:  Chew Terr [ Wed Jul 20, 2011 1:06 pm ]
Post subject:  Re: I love this tesuji
Kirby wrote:
Numsgil wrote:
Click Here To Show Diagram Code
[go]$$
$$ --------------------
$$ | . . . O . . . . . .
$$ | 4 3 O 2 O X X . . .
$$ | . O 1 O X O O . X X
$$ | O X X O X O X X X O
$$ | . O X O X X O O O O
$$ | O . X O X . X . O X
$$ | O X X X X X O O O X
$$ | . O O X . O X O . .
$$ | . O . O O O X O X X
$$ | . O O O O X X O O X[/go]


Ko, no?

edit: answered my own question :P:

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



If white has ko threats, I suppose he could consider playing that way to prevent black from getting the points that are referenced in the previous couple of posts.

Yeah, exactly.
Author:  yoyoma [ Wed Jul 20, 2011 1:50 pm ]
Post subject:  Re: I love this tesuji
Click Here To Show Diagram Code
[go]$$
$$ --------------------
$$ | b 5 c O . 6 7 . . .
$$ | 4 3 O 2 O X X . . .
$$ | 8 O 1 O X O O . X X
$$ | O X X O X O X X X O
$$ | a O X O X X O O O O
$$ | O . X O X . X . O X
$$ | O X X X X X O O O X
$$ | . O O X . O X O . .
$$ | . O . O O O X O X X
$$ | . O O O O X X O O X[/go]


White could stubbornly insist on playing a, b, and c while fighting ko!
:rambo:
Author:  tchan001 [ Wed Jul 20, 2011 4:56 pm ]
Post subject:  Re: I love this tesuji
What I really love is how the group of 4 black stones at the bottom have no liberties and are still alive on the board.
Author:  lorill [ Wed Jul 20, 2011 11:18 pm ]
Post subject:  Re: I love this tesuji
That's only because the border is far away... I thought it was useless to post the full position.
Author:  HermanHiddema [ Thu Jul 21, 2011 4:55 am ]
Post subject:  Re: I love this tesuji
tchan001 wrote:
What I really love is how the group of 4 black stones at the bottom have no liberties and are still alive on the board.


I thought the same thing, but then I realized it is a corner diagram, though it is rather hard to spot :)

Tip for lorill: When you post something as a problem, remove superfluous stones, like those in the center in this diagram :)
Author:  cyclops [ Thu Jul 21, 2011 5:37 pm ]
Post subject:  Re: I love this tesuji
Tip for sailors: look what a shore looks like.
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