After
in Dr Straw's first diagram, I doubt if White can find space to make two eyes. And it's hard to see how white can capture anything, or connect to the outside.How did White live in the game you played?
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| Can this 3-3 invasion be killed? http://www.lifein19x19.com/viewtopic.php?f=12&t=10042 |
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| Author: | kaimat [ Sat Mar 22, 2014 7:08 pm ] |
| Post subject: | Can this 3-3 invasion be killed? |
This invasion was the difference between me beating and losing to a 1d in an even game on Tygem. I have always thought that the marked black stones secured the corner, and when you add in the extra supporting stones it seems like this should (in theory) be an easy kill for black. |
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| Author: | DrStraw [ Sat Mar 22, 2014 7:23 pm ] |
| Post subject: | Re: Can this 3-3 invasion be killed? |
It is hard to find a way for W to live. Just a couple of possibilities: |
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| Author: | TheBigH [ Sat Mar 22, 2014 7:47 pm ] |
| Post subject: | Re: Can this 3-3 invasion be killed? |
After in Dr Straw's first diagram, I doubt if White can find space to make two eyes. And it's hard to see how white can capture anything, or connect to the outside.How did White live in the game you played? |
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| Author: | SmoothOper [ Sat Mar 22, 2014 8:34 pm ] |
| Post subject: | Re: Can this 3-3 invasion be killed? |
Might be able to get a reduction or ko out of it. |
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| Author: | TheBigH [ Sat Mar 22, 2014 9:30 pm ] |
| Post subject: | Re: Can this 3-3 invasion be killed? |
SmoothOper wrote: Might be able to get a reduction or ko out of it. Or perhaps a bunch of forcing moves that finish building white's wall and seal black in. |
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| Author: | SmoothOper [ Sun Mar 23, 2014 5:52 am ] |
| Post subject: | Re: Can this 3-3 invasion be killed? |
SmoothOper wrote: Might be able to get a reduction or ko out of it. If B defends at... |
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| Author: | DrStraw [ Sun Mar 23, 2014 5:59 am ] |
| Post subject: | Re: Can this 3-3 invasion be killed? |
SmoothOper wrote: Might be able to get a reduction or ko out of it. |
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| Author: | SmoothOper [ Sun Mar 23, 2014 9:07 am ] |
| Post subject: | Re: Can this 3-3 invasion be killed? |
| Author: | moboy78 [ Sun Mar 23, 2014 9:30 am ] |
| Post subject: | Re: Can this 3-3 invasion be killed? |
What did you play out in your game, kaimat? |
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| Author: | kaimat [ Sun Mar 23, 2014 10:12 am ] |
| Post subject: | Re: Can this 3-3 invasion be killed? |
moboy78 wrote: What did you play out in your game, kaimat? I was afraid to play the ko   at
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| Author: | Mef [ Mon Mar 24, 2014 8:45 am ] |
| Post subject: | Re: Can this 3-3 invasion be killed? |
DrStraw wrote: After 9, A-B-C makes 2 stage ko? |
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| Author: | ez4u [ Mon Mar 24, 2014 3:30 pm ] |
| Post subject: | Re: Can this 3-3 invasion be killed? |
Mef wrote: Does moving 5 to B15 just kill? The play at 'c' loses its meaning. |
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| Author: | gogameguru [ Mon Mar 24, 2014 9:30 pm ] |
| Post subject: | Re: Can this 3-3 invasion be killed? |
Another thing to consider, after reading out DrStraw's sequences above, is  :If White tries ,  is a simple and good move which kills White in this case. It should be your first instinct. Instead of , Black b is also possible, but when the simple move works, it's usually better in Go.Black has to be careful not to play at 'a' instead. Otherwise, White will eke out a ko as follows:After this, a and b are miai and the ko is annoying for Black. I often see players make this kind of mistake, so I thought it was worth mentioning. |
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