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I love this tesuji

https://www.lifein19x19.com/viewtopic.php?t=4296

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I love this tesuji

Posted: Wed Jul 20, 2011 12:11 pm
by lorill
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.

Re: I love this tesuji

Posted: Wed Jul 20, 2011 12:20 pm
by Kirby
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]

Re: I love this tesuji

Posted: Wed Jul 20, 2011 12:25 pm
by lorill
@kirby: 5 is useless, but that's it.

Re: I love this tesuji

Posted: Wed Jul 20, 2011 12:27 pm
by Kirby
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.

Re: I love this tesuji

Posted: Wed Jul 20, 2011 12:34 pm
by lorill
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!

Re: I love this tesuji

Posted: Wed Jul 20, 2011 12:57 pm
by Kirby
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.

Re: I love this tesuji

Posted: Wed Jul 20, 2011 1:01 pm
by Numsgil
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]

Re: I love this tesuji

Posted: Wed Jul 20, 2011 1:05 pm
by Chew Terr
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.

Re: I love this tesuji

Posted: Wed Jul 20, 2011 1:05 pm
by Kirby
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.

Re: I love this tesuji

Posted: Wed Jul 20, 2011 1:06 pm
by Chew Terr
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.

Re: I love this tesuji

Posted: Wed Jul 20, 2011 1:50 pm
by yoyoma
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:

Re: I love this tesuji

Posted: Wed Jul 20, 2011 4:56 pm
by tchan001
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.

Re: I love this tesuji

Posted: Wed Jul 20, 2011 11:18 pm
by lorill
That's only because the border is far away... I thought it was useless to post the full position.

Re: I love this tesuji

Posted: Thu Jul 21, 2011 4:55 am
by HermanHiddema
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 :)

Re: I love this tesuji

Posted: Thu Jul 21, 2011 5:37 pm
by cyclops
Tip for sailors: look what a shore looks like.
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