can you kill this 3-3 invasion?

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cdybeijing
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can you kill this 3-3 invasion?

Post by cdybeijing »



The following sequence arises from the main variation of the 3-3 invasion inside the 4-4 hoshi stone.

After black 1, if white ignores by playing 2, what is the best sequence of play locally for black?
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Magicwand
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Re: can you kill this 3-3 invasion?

Post by Magicwand »

tenuki!
you can not kill them so why bother playing 1?
if you spend 1 more move then you are really in trouble..so i suggest you tenuki now.
"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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Re: can you kill this 3-3 invasion?

Post by Solomon »

Well I can guarantee you that the White corner can't be killed. The best for Black is simply the T14-T16 exchange, but this is just small endgame.

BUT...

Click Here To Show Diagram Code
[go]$$Bc
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . X O O . . |
$$ . . . X . X O . . |
$$ . . . . . X O . . |
$$ . . . . . . X O . |
$$ . . . . . . X O . |
$$ . . . . . . X X B |
$$ . . . . . . . . . |
$$ . . . . . . . . . |
$$ . . . . . . . . . |[/go]

This is a different story. If Black has T13 and it's his turn, then White's corner can be killed.
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Re: can you kill this 3-3 invasion?

Post by DrStraw »

The original question is whether the 3-3 invasion can be killed. The answer is yes, as long as there is sufficient outside thickness. Black must chase white out into the middle with a move at S16. But this is risky unless black is absolutely certain that white cannot live by escaping.
Still officially AGA 5d but I play so irregularly these days that I am probably only 3d or 4d over the board (but hopefully still 5d in terms of knowledge, theory and the ability to contribute).
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Re: can you kill this 3-3 invasion?

Post by Harleqin »

The turning at :b1: is not sente against the corner. This is actually the reason that White adds another crawl on the second line.
A good system naturally covers all corner cases without further effort.
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Re: can you kill this 3-3 invasion?

Post by Magicwand »

Araban wrote:Well I can guarantee you that the White corner can't be killed. The best for Black is simply the T14-T16 exchange, but this is just small endgame.

BUT...

Click Here To Show Diagram Code
[go]$$Bc
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . X O O . . |
$$ . . . X . X O . . |
$$ . . . . . X O . . |
$$ . . . . . . X O . |
$$ . . . . . . X O . |
$$ . . . . . . X X B |
$$ . . . . . . . . . |
$$ . . . . . . . . . |
$$ . . . . . . . . . |[/go]

This is a different story. If Black has T13 and it's his turn, then White's corner can be killed.


can you show me how you can kill this group?
"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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Re: can you kill this 3-3 invasion?

Post by Solomon »

Magicwand wrote:
Araban wrote:Well I can guarantee you that the White corner can't be killed. The best for Black is simply the T14-T16 exchange, but this is just small endgame.

BUT...

Click Here To Show Diagram Code
[go]$$Bc
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . X O O . . |
$$ . . . X . X O . . |
$$ . . . . . X O . . |
$$ . . . . . . X O . |
$$ . . . . . . X O . |
$$ . . . . . . X X B |
$$ . . . . . . . . . |
$$ . . . . . . . . . |
$$ . . . . . . . . . |[/go]

This is a different story. If Black has T13 and it's his turn, then White's corner can be killed.


can you show me how you can kill this group?

Click Here To Show Diagram Code
[go]$$Bc
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . X O O . 3 |
$$ . . . X . X O 2 . |
$$ . . . . . X O 1 4 |
$$ . . . . . . X O . |
$$ . . . . . . X O 5 |
$$ . . . . . . X X X |
$$ . . . . . . . . . |
$$ . . . . . . . . . |
$$ . . . . . . . . . |[/go]
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Re: can you kill this 3-3 invasion?

Post by Magicwand »

Araban wrote:
Magicwand wrote:
Araban wrote:Well I can guarantee you that the White corner can't be killed. The best for Black is simply the T14-T16 exchange, but this is just small endgame.

BUT...

Click Here To Show Diagram Code
[go]$$Bc
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . X O O . . |
$$ . . . X . X O . . |
$$ . . . . . X O . . |
$$ . . . . . . X O . |
$$ . . . . . . X O . |
$$ . . . . . . X X B |
$$ . . . . . . . . . |
$$ . . . . . . . . . |
$$ . . . . . . . . . |[/go]

This is a different story. If Black has T13 and it's his turn, then White's corner can be killed.


can you show me how you can kill this group?

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


really? i belive you are wrong on this. let me know if i missed something.
Click Here To Show Diagram Code
[go]$$Bc
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . X O O 4 3 |
$$ . . . X . X O . 6 |
$$ . . . . . X O 1 2 |
$$ . . . . . . X O . |
$$ . . . . . . X O 5 |
$$ . . . . . . X X X |
$$ . . . . . . . . . |
$$ . . . . . . . . . |
$$ . . . . . . . . . |[/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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oren
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Re: can you kill this 3-3 invasion?

Post by oren »

Magicwand wrote:
really? i belive you are wrong on this. let me know if i missed something.
Click Here To Show Diagram Code
[go]$$Bc
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . X O O 4 3 |
$$ . . . X . X O . 6 |
$$ . . . . . X O 1 2 |
$$ . . . . . . X O . |
$$ . . . . . . X O 5 |
$$ . . . . . . X X X |
$$ . . . . . . . . . |
$$ . . . . . . . . . |
$$ . . . . . . . . . |[/go]


Black at T19 next if I'm not mistaken
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Re: can you kill this 3-3 invasion?

Post by Darrell »

Magicwand wrote:
really? i belive you are wrong on this. let me know if i missed something.
Click Here To Show Diagram Code
[go]$$Bc
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . X O O 4 3 |
$$ . . . X . X O . 6 |
$$ . . . . . X O 1 2 |
$$ . . . . . . X O . |
$$ . . . . . . X O 5 |
$$ . . . . . . X X X |
$$ . . . . . . . . . |
$$ . . . . . . . . . |
$$ . . . . . . . . . |[/go]

oren wrote:
Black at T19 next if I'm not mistaken

I thought the same thing, however after white captures a and b are miai:
Click Here To Show Diagram Code
[go]$$Bc
$$ ------------------
$$ . . . . . a . O . |
$$ . . . . X O O O . |
$$ . . . X . X O . O |
$$ . . . . . X O X O |
$$ . . . . . . X O b |
$$ . . . . . . X O X |
$$ . . . . . . X X X |
$$ . . . . . . . . . |
$$ . . . . . . . . . |
$$ . . . . . . . . . |[/go]
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Re: can you kill this 3-3 invasion?

Post by amnal »

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


This 5 is better.
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Re: can you kill this 3-3 invasion?

Post by oren »

Thanks, Darrell. Should have seen that.
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Re: can you kill this 3-3 invasion?

Post by Solomon »

Magicwand wrote:
really? i belive you are wrong on this. let me know if i missed something.
Click Here To Show Diagram Code
[go]$$Bc
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . X O O 4 3 |
$$ . . . X . X O . 6 |
$$ . . . . . X O 1 2 |
$$ . . . . . . X O . |
$$ . . . . . . X O 5 |
$$ . . . . . . X X X |
$$ . . . . . . . . . |
$$ . . . . . . . . . |
$$ . . . . . . . . . |[/go]

Read your message in class, so...
Image


edit: amnal got it as well.
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Re: can you kill this 3-3 invasion?

Post by unkx80 »

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


This kills as well.
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Re: can you kill this 3-3 invasion?

Post by Magicwand »

Araban wrote:
Magicwand wrote:
really? i belive you are wrong on this. let me know if i missed something.
Click Here To Show Diagram Code
[go]$$Bc
$$ ------------------
$$ . . . . . . . . . |
$$ . . . . X O O 4 3 |
$$ . . . X . X O . 6 |
$$ . . . . . X O 1 2 |
$$ . . . . . . X O . |
$$ . . . . . . X O 5 |
$$ . . . . . . X X X |
$$ . . . . . . . . . |
$$ . . . . . . . . . |
$$ . . . . . . . . . |[/go]

Read your message in class, so...
Image


edit: amnal got it as well.


thank you very much..

i just noticed something funny about your note.
your handwriting is same as mine.
i thought i was looking at my notes from college.

did you notice that all mathmaticians have bad handwriting and notes?
"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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