| Life In 19x19 http://prod.lifein19x19.com/ |
|
| Double ko variation ? http://prod.lifein19x19.com/viewtopic.php?f=12&t=5956 |
Page 1 of 1 |
| Author: | clemi [ Fri May 11, 2012 1:56 am ] |
| Post subject: | Double ko variation ? |
Hi all, here's a variation on a problem coming from the book Tesuji : Can we say that the double ko after black takes at 2 and white takes the circle black stone forms a seki ? The triangle black stones must of course live for this to work and this seems to me to be the best defense for black for his group to not be captured. What do you think ? |
|
| Author: | Sverre [ Fri May 11, 2012 2:28 am ] |
| Post subject: | Re: Double ko variation ? |
Black is dead. Black can't fill the ko and White play atari at a every time Black takes at b |
|
| Author: | clemi [ Fri May 11, 2012 2:50 am ] |
| Post subject: | Re: Double ko variation ? |
Your point is right, I now see that it is a ko that black will never win locally. So the best yose for black is to capture 1 at b and connect whereas white will eat the black group. |
|
| Author: | Sverre [ Fri May 11, 2012 2:59 am ] |
| Post subject: | Re: Double ko variation ? |
clemi wrote: Your point is right, I now see that it is a ko that black will never win locally. So the best yose for black is to capture 1 at b and connect whereas white will eat the black group. Note that every time Black takes the a ko White must take the b ko, and every time Black takes the b ko Whtie must take the a ko. Black should not be in any hurry to resolve this situation as either White must spend an extra move locally or Black has an inexhaustible supply of ko threats. |
|
| Page 1 of 1 | All times are UTC - 8 hours [ DST ] |
| Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group http://www.phpbb.com/ |
|