Thanks, I meant to preview
Fixed in the original post.
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| Life and Death from Recent Game http://www.lifein19x19.com/viewtopic.php?f=4&t=3729 |
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| Author: | NousAutres [ Mon Apr 25, 2011 5:33 am ] |
| Post subject: | Life and Death from Recent Game |
I was playing black in a face-to-face match when white played this move: The resulting sequence killed my corner. Is there any way for black to salvage the position here and make some kind of life? |
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| Author: | tj86430 [ Mon Apr 25, 2011 5:36 am ] |
| Post subject: | Re: Life and Death from Recent Game |
There is something wrong with your diagram (at least there is an extra empty line, and I think by Q you mean W. Like this: e: and to answer your question: black looks pretty dead to me. |
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| Author: | NousAutres [ Mon Apr 25, 2011 5:39 am ] |
| Post subject: | Re: Life and Death from Recent Game |
Thanks, I meant to preview Fixed in the original post. |
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| Author: | Magicwand [ Mon Apr 25, 2011 10:02 am ] |
| Post subject: | Re: Life and Death from Recent Game |
1 above seems like only move black can play to stay alive. not reading too deeply...it is very hard to kill black without ko. i think you need to give little more info on top and left side. |
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| Author: | aurik [ Mon Apr 25, 2011 10:12 am ] |
| Post subject: | Re: Life and Death from Recent Game |
Looks like ko after B1 given by above, if Black doesn't have a chance to escape along the edge. Something like this? edit: that variation actually might just be dead for W. Anyway, there are lots of variations to explore, I wouldn't say this is clearly dead for B. Escape up the right side is a powerful threat. |
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| Author: | Abydos1 [ Mon Apr 25, 2011 12:25 pm ] |
| Post subject: | Re: Life and Death from Recent Game |
aurik wrote: Looks like ko after B1 given by above, if Black doesn't have a chance to escape along the edge. Something like this? Black can play  @ W10 and is clearly alive.This is the best I could come up with; looks like white should get at least ko. |
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| Author: | aurik [ Mon Apr 25, 2011 1:01 pm ] |
| Post subject: | Re: Life and Death from Recent Game |
Yes, much better. B5 allows W to play 6 in sente, setting up the ko. So naturally, I questioned that move, but the alternative B5 @ 7 also seems to lead to ko. B@a -> W@b throw-in ko B@b -> W@a, then if B@c, W@d throw-in ko B@b -> w@a, if B@d, W@f, B@g, W@c. The corner is bent-4 but not dead as the status of the surrounding B group is questionable, so it will probably be played out as a ko, my guess is that should be played immediately at this point. Once again, W must find the first threat. See anything I've missed? Edit: of these options, I like option 2 the best. Option 3 gives W the forcing move at f. Option 1 and 2 look quite close, but option 2 is perhaps slightly better late in the game, as there is the possibility of an additional ko threat (at the 1-1 point) if all of black's outside liberties are filled. |
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| Author: | Magicwand [ Mon Apr 25, 2011 3:04 pm ] |
| Post subject: | Re: Life and Death from Recent Game |
i think it is alive.. |
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| Author: | Abydos1 [ Mon Apr 25, 2011 3:25 pm ] |
| Post subject: | Re: Life and Death from Recent Game |
Magicwand wrote:  neat,  is a nice tesuji; I can't see anything else then.
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