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| Problem from One of my KGS Games http://www.lifein19x19.com/viewtopic.php?f=11&t=5957 |
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| Author: | Charlie [ Fri May 11, 2012 5:07 am ] |
| Post subject: | Problem from One of my KGS Games |
Here's a problem from my lunch-time game on KGS. White has just played  , how should black kill? (Is it even possible to kill?)In the game, I managed to kill white's invasion. When I went over the game, afterwards, I realised that I should have stopped it entirely, several moves earlier. I also realised that white could have lived and possibly cut off my lower-right group. In fact, I couldn't find a move for black that would prevent white from doing so. |
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| Author: | mw42 [ Fri May 11, 2012 6:32 am ] |
| Post subject: | Re: Problem from One of my KGS Games |
EDIT: Also, have a look at this tsumego: http://eidogo.com/?game=1Lc8jeHa#1Lc8jeHa. The situation is similar, but black can live. |
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| Author: | Lamp [ Sun May 13, 2012 3:41 pm ] |
| Post subject: | Re: Problem from One of my KGS Games |
mw42 wrote: EDIT: Also, have a look at this tsumego: http://eidogo.com/?game=1Lc8jeHa#1Lc8jeHa. The situation is similar, but black can live. What if white plays 3 at 6? |
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| Author: | jts [ Sun May 13, 2012 4:55 pm ] |
| Post subject: | Re: Problem from One of my KGS Games |
Lamp wrote: mw42 wrote: EDIT: Also, have a look at this tsumego: http://eidogo.com/?game=1Lc8jeHa#1Lc8jeHa. The situation is similar, but black can live. What if white plays 3 at 6? 4 at 5 works, right? |
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| Author: | Lamp [ Sun May 13, 2012 5:29 pm ] |
| Post subject: | Re: Problem from One of my KGS Games |
jts wrote: Lamp wrote: mw42 wrote: EDIT: Also, have a look at this tsumego: http://eidogo.com/?game=1Lc8jeHa#1Lc8jeHa. The situation is similar, but black can live. What if white plays 3 at 6? 4 at 5 works, right? It's hard for me to prove. There are a lot of variations from here. And maybe 5 (or 6) wasn't correct anyway. Edit: After looking at this some more, I think white is still dead. |
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| Author: | jts [ Sun May 13, 2012 5:42 pm ] |
| Post subject: | Re: Problem from One of my KGS Games |
B looks fine to me, but I must be misreading horribly since I can't even see where the ko you mention would come from. Four libs to three after W captures, no? |
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| Author: | Dusk Eagle [ Sun May 13, 2012 6:31 pm ] |
| Post subject: | Re: Problem from One of my KGS Games |
That's hard to read though. This is simpler: White has only two liberties and can't do a thing about it. |
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| Author: | Lamp [ Sun May 13, 2012 7:57 pm ] |
| Post subject: | Re: Problem from One of my KGS Games |
jts wrote: B looks fine to me, but I must be misreading horribly since I can't even see where the ko you mention would come from. Four libs to three after W captures, no? The ko came from me overthinking the problem  Somewhere in the middle of the sequence I was playing w H1 and then b G1. Obviously b would play G2 though.I guess the best white can do is take sente to play somewhere else, and then later come back and get a ton of ko threats out of the position by threatening to live. |
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