Thanks for your fast answer. I wasn't sure if I had read out all variations and anxiously returned later in the game to spend another move.
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| Is this corner alive? http://www.lifein19x19.com/viewtopic.php?f=15&t=836 |
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| Author: | blue88 [ Sun Jun 13, 2010 3:54 am ] |
| Post subject: | Is this corner alive? |
Today I decided to revive an aji corner stone and it worked out quite well leaving me with this position: I could have made a Weak Carpenter's Square with one leg at C4 (as far as I know that shape turns out as seki?) but decided to play 2-2 for unconditional life with points. It worked in the game, but I wonder whether it really is alive. |
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| Author: | DrStraw [ Sun Jun 13, 2010 4:02 am ] |
| Post subject: | Re: Is this corner alive? |
It is alive after the 2-2. Answer A4 with B3. |
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| Author: | blue88 [ Sun Jun 13, 2010 4:06 am ] |
| Post subject: | Re: Is this corner alive? |
Thanks for your fast answer. I wasn't sure if I had read out all variations and anxiously returned later in the game to spend another move.
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| Author: | cyclops [ Sun Jun 13, 2010 7:19 am ] |
| Post subject: | Re: Is this corner alive? |
For fun I tried to kill your shape ( W moving first ) and I found this sequence: |
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| Author: | Harleqin [ Sun Jun 13, 2010 7:46 am ] |
| Post subject: | Re: Is this corner alive? |
You should first explore the simpler starting moves, cyclops. |
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| Author: | illluck [ Sun Jun 13, 2010 8:20 am ] |
| Post subject: | Re: Is this corner alive? |
The 2-2 point might work, but black 2-3 in response seems hard to handle. First instinct was the clamp (which works, I think), but then realized that the 1-2 point seems cleaner. |
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| Author: | tj86430 [ Sun Jun 13, 2010 8:25 am ] |
| Post subject: | Re: Is this corner alive? |
Harleqin wrote: You should first explore the simpler starting moves, cyclops. How about C4? |
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| Author: | Dusk Eagle [ Sun Jun 13, 2010 11:28 am ] |
| Post subject: | Re: Is this corner alive? |
Just to demonstrate why I belive the clamp works: I believe C4 also works to kill: However, if black plays 2-2 before white moves, I see no way for white to kill or make seki. |
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