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Offline lorill
 Post subject: I love this tesuji
Post #1 Posted: Wed Jul 20, 2011 12:11 pm 
Lives with ko

Posts: 281
Location: France
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Was liked: 25
Rank: yes
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.
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Offline Kirby
 Post subject: Re: I love this tesuji
Post #2 Posted: Wed Jul 20, 2011 12:20 pm 
Honinbo

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KGS: Kirby
Tygem: 커비라고해
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]

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Offline lorill
 Post subject: Re: I love this tesuji
Post #3 Posted: Wed Jul 20, 2011 12:25 pm 
Lives with ko

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@kirby: 5 is useless, but that's it.
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Offline Kirby
 Post subject: Re: I love this tesuji
Post #4 Posted: Wed Jul 20, 2011 12:27 pm 
Honinbo

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KGS: Kirby
Tygem: 커비라고해
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.

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This post by Kirby was liked by: lorill
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Offline lorill
 Post subject: Re: I love this tesuji
Post #5 Posted: Wed Jul 20, 2011 12:34 pm 
Lives with ko

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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!
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Offline Kirby
 Post subject: Re: I love this tesuji
Post #6 Posted: Wed Jul 20, 2011 12:57 pm 
Honinbo

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Tygem: 커비라고해
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.

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Offline Numsgil
 Post subject: Re: I love this tesuji
Post #7 Posted: Wed Jul 20, 2011 1:01 pm 
Lives in gote
User avatar

Posts: 614
Liked others: 28
Was liked: 65
Rank: 1 Kyu KGS
KGS: 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]

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Offline Chew Terr
 Post subject: Re: I love this tesuji
Post #8 Posted: Wed Jul 20, 2011 1:05 pm 
Gosei
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KGS: Chew
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.

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Offline Kirby
 Post subject: Re: I love this tesuji
Post #9 Posted: Wed Jul 20, 2011 1:05 pm 
Honinbo

Posts: 9552
Liked others: 1602
Was liked: 1712
KGS: Kirby
Tygem: 커비라고해
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.

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Offline Chew Terr
 Post subject: Re: I love this tesuji
Post #10 Posted: Wed Jul 20, 2011 1:06 pm 
Gosei
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GD Posts: 264
KGS: Chew
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.

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Offline yoyoma
 Post subject: Re: I love this tesuji
Post #11 Posted: Wed Jul 20, 2011 1:50 pm 
Lives in gote

Posts: 653
Location: Austin, Texas, USA
Liked others: 54
Was liked: 216
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:

This post by yoyoma was liked by: Kirby
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Offline tchan001
 Post subject: Re: I love this tesuji
Post #12 Posted: Wed Jul 20, 2011 4:56 pm 
Gosei
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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.

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This post by tchan001 was liked by 2 people: Akura, topazg
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Offline lorill
 Post subject: Re: I love this tesuji
Post #13 Posted: Wed Jul 20, 2011 11:18 pm 
Lives with ko

Posts: 281
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Was liked: 25
Rank: yes
That's only because the border is far away... I thought it was useless to post the full position.
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Offline HermanHiddema
 Post subject: Re: I love this tesuji
Post #14 Posted: Thu Jul 21, 2011 4:55 am 
Gosei
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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 :)
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Offline cyclops
 Post subject: Re: I love this tesuji
Post #15 Posted: Thu Jul 21, 2011 5:37 pm 
Lives in sente
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Tip for sailors: look what a shore looks like.
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