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| Interesting go problem from a real game http://www.lifein19x19.com/viewtopic.php?f=12&t=13544 |
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| Author: | gamesorry [ Thu Sep 01, 2016 10:19 pm ] |
| Post subject: | Interesting go problem from a real game |
I recently came across an interesting game in one of the online tournaments: The question is, after white's move, can black defend the corner without a ko? |
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| Author: | dhu163 [ Fri Sep 02, 2016 3:10 am ] |
| Post subject: | Re: Interesting go problem from a real game |
I think so |
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| Author: | Shaddy [ Fri Sep 02, 2016 3:16 am ] |
| Post subject: | Re: Interesting go problem from a real game |
dhu163 wrote: Ko. I don't see any way for Black to keep the whole corner, at least the 2 stones on top are going to get ko'd. |
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| Author: | Tryss [ Fri Sep 02, 2016 3:19 am ] |
| Post subject: | Re: Interesting go problem from a real game |
Edit : same idea as Shaddy White won't play like that in this line : |
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| Author: | skydyr [ Fri Sep 02, 2016 10:57 am ] |
| Post subject: | Re: Interesting go problem from a real game |
| Author: | Shaddy [ Fri Sep 02, 2016 11:34 am ] |
| Post subject: | Re: Interesting go problem from a real game |
skydyr - still not enough liberties. |
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| Author: | skydyr [ Fri Sep 02, 2016 12:18 pm ] |
| Post subject: | Re: Interesting go problem from a real game |
Shaddy wrote: skydyr - still not enough liberties. In the last diagram? I don't see it, so could you explain? That said, I think on re-examination, white can play at  instead and black can either play an unfavourable ko or connect and let white connect under.Edit: Nevermind, I'm still counting four for some reason. |
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| Author: | phillip1882 [ Sun Sep 11, 2016 3:51 pm ] |
| Post subject: | Re: Interesting go problem from a real game |
now what for white? |
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| Author: | Schachus [ Sun Sep 11, 2016 4:44 pm ] |
| Post subject: | Re: Interesting go problem from a real game |
Phillip: Black is captured, because he cant approach a, so white b next captures. |
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| Author: | gamesorry [ Mon Sep 12, 2016 12:46 am ] |
| Post subject: | Re: Interesting go problem from a real game |
Thanks, so it does seem that a ko is unavoidable. FYI, the original game is here. I missed white's refusal at (4,1) at first glance. |
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| Author: | rafaelclp [ Mon Sep 12, 2016 10:18 pm ] |
| Post subject: | Re: Interesting go problem from a real game |
Schachus wrote: Phillip: I still don't get why black dies. Wouldn't 5 below save black if white played as expected above?Black is captured, because he cant approach a, so white b next captures. Edit: oh, right, it still ends in ko |
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