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#263 Magicwand vs Joaz Banbeck http://www.lifein19x19.com/viewtopic.php?f=37&t=13419 |
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Author: | Magicwand [ Wed Sep 14, 2016 7:15 pm ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
Thank my opponent for giving me more influence... |
Author: | Joaz Banbeck [ Wed Sep 14, 2016 11:33 pm ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
This secures the corner, and threatens to connect my side and corner over the dead body of S14. According to my reading, there is no way that he can save S14 in such a manner that he threatens to kill my side. So I should come out with sente. I might play P16. BTW, according to the books/sites that I have read, the joseki is this:
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Author: | Magicwand [ Thu Sep 15, 2016 6:35 am ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
S15 |
Author: | tj86430 [ Thu Sep 15, 2016 11:32 am ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
Magicwand wrote: S15
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Author: | Joaz Banbeck [ Thu Sep 15, 2016 10:21 pm ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
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Author: | Magicwand [ Fri Sep 16, 2016 10:04 am ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
trigger if you accept
again...i have no plan if he cut. hope this empty hide tag discourage him from cutting |
Author: | Joaz Banbeck [ Fri Sep 16, 2016 10:24 am ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
@observers: You observers may be wondering: "Why is Joaz deviating from a hitherto largely successful strategy of influence, and turning to fighting from the dubious vantage point of a small enclosed group?" The answer is L5:
As a subtle side effect of the recent fighting in the lower right, the minor addition of L5 has made white's center group vulnerable. I don't know if MW even noticed it. The white center group is now alive only with ko - at least according to my reading. The rest of this post will be devoted to examining that proposition. It is a flower-viewing ko for me: I risk only a few attacking stones, white risks the whole middle of the board. It starts like this:
The first minor effect of this is that the potential white eye at K10 is now gone unless white makes an extra effort to restore it. Now L9 and J11 are miai to make it a false eye.
The second thing worth noting is that the potential eye space at K6 is now compromised. There are two ways that it becomes worthless: 1) Black plays on L8 below, and white has to fill. 2) Black plays on J7, and K6 is a false eye.
These weaknesses are almost enough to seal white's death. Unfortunately, white has one sequence that helps him. He can get H5 in sente:
As I'm writing this I see that MW has played. I have to look at that. More later... |
Author: | Joaz Banbeck [ Fri Sep 16, 2016 10:27 am ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
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Author: | Joaz Banbeck [ Fri Sep 16, 2016 10:44 am ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
@Observers: Joaz Banbeck wrote: You observers may be wondering: "Why is Joaz deviating from a hitherto largely successful strategy of influence, and turning to fighting from the dubious vantage point of a small enclosed group?" ... The white center group is now alive only with ko - at least according to my reading. ...white has one sequence that helps him. He can get H5 in sente:
As I'm writing this I see that MW has played. I have to look at that. More later... As expected, white has enclosed, and I have cut. He now has two marginal groups on the outside, and I have a small group in the corner. All of them are targets for ko threats. This should be good for me. If white wins the ko and lives in the center and I kill one of the two small white groups in the upper right, I am way ahead on points. If black wins the ko in the center at the expense of losing the black corner group in the upper right, the net profit should also be enough to win. So don't be surprised if you read MW boasting that he is going to kill the corner. I'm not making a lot of effort to protect it. I'm focused on the center of the board. The sequence that leads to the ko looks like this:
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Author: | Schachus [ Fri Sep 16, 2016 11:24 am ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
I feel like this game would have been more interesting with less/no handicap. As it is, it seems to me MW is just trying to make the game complicated by all means, not trying to play good moves. Maybe that is his best shot at winning, but it would be more fun game, if he was playing "normally" trying to catch up slowly. If that is not possible, because Joaz is too good to catch up 3 stones normally, then IMO the handicap is too high. |
Author: | Go_Japan [ Fri Sep 16, 2016 2:31 pm ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
Schachus wrote: Joaz is too good to catch up 3 stones normally, then IMO the handicap is too high. I agree that the handi is probably too high here. It is very hard to know in advance of playing, though, because this style game is quite different and it is also a very slow game with open book, iirc. Maybe they will play again with lower handi. We have to wait, though because perhaps some points can be made up in the end game or by clever invasions later using some good aji. |
Author: | Magicwand [ Fri Sep 16, 2016 7:54 pm ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
empty comment. |
Author: | Joaz Banbeck [ Fri Sep 16, 2016 10:36 pm ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
No other choice, really. I must keep him separated. And I don't want to get trapped. |
Author: | Magicwand [ Sat Sep 17, 2016 10:41 am ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
black ajikeshi. if black keep that up he will lose. |
Author: | Joaz Banbeck [ Sat Sep 17, 2016 11:11 am ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
Trigger:
Move 136 is the second of two vulgar moves, whose sole purpose is to strengthen my corner in sente. Move 138 gets my group out, if he tries really hard to prevent that, it forms an eye at R8. So my right side group is alive. Now he has to figure out where he gets his eyes. |
Author: | Joaz Banbeck [ Sat Sep 17, 2016 1:04 pm ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
A note to beginners about shape: WARNING: Don't try this at home.
In a previous post, I noted that "...Move 136 is the second of two vulgar moves, whose sole purpose is to strengthen my corner in sente..." If it were not for sente issues, IMHO the proper play in the corner would have been this:
It potentially concedes a point, but the corner now is unkillable. And any yose play against it is gote. In the long run that is probably worth more than a point. In many variations, black has to play S17 anyway, so there is no point lost. |
Author: | Magicwand [ Sat Sep 17, 2016 7:23 pm ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
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Author: | Joaz Banbeck [ Sat Sep 17, 2016 8:50 pm ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
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Author: | Magicwand [ Sat Sep 17, 2016 9:04 pm ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
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Author: | Joaz Banbeck [ Sat Sep 17, 2016 9:27 pm ] |
Post subject: | Re: #263 Magicwand vs Joaz Banbeck |
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