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#231 drmwc vs Joaz Banbeck http://www.lifein19x19.com/viewtopic.php?f=37&t=9917 |
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Author: | Bill Spight [ Mon Aug 18, 2014 9:05 pm ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
This is a FWIW comment. is Joaz's contemplated move.
Now, I thought about that move for .
The reason being that is joseki, and it would be pleasant to push White around a little bit. It also clarifies the situation. But, especially in a four stone game, why should White clarify the situation?
A play like here is a distinct possibility. So I thought that Joaz was wise to take his profit with .
Here complicates things, but why? White is generally the one to seek complications in a handicap game. And why now, when Black avoided complications on his previous move? Besides, is predictable. Now what? Black has to worry about his position on the top left side. If , White can slide in with . ( here with the open skirt is not good. Don't try this at home, kids. )
Here stakes a claim on the corner and attacks the White stones on the top side. is standard. Now makes territory while attacking. White should have no trouble making sabaki with his stones on the left side, but Black can aim at solidifying his remaining advantage. I can't say that at H-17 would be a mistake, but it would complicate things when Black has a clear plan to decide the game in his favor. |
Author: | Joaz Banbeck [ Wed Aug 20, 2014 2:23 pm ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
I can't find anything that looks bad for me immediately. |
Author: | EdLee [ Wed Aug 20, 2014 2:26 pm ] |
Post subject: | |
Let the fireworks begin. |
Author: | Joaz Banbeck [ Wed Aug 20, 2014 3:09 pm ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
I posted my move quickly with minimal comments so that my opponent could see it before bedtime in the British isles. Now that it is posted, I'll add more comments. I am not happy with the speed of my game. On at least six separate occasions, I made moves that were reinforcing or defensive. I could reeinforce myself into a loss by doing that. I figure that all of my groups are strong - except the one just played, of course - and he now has three groups that have to watch their step. A fight should favor me.
The alternative was this:
That is another 10 points net for him, and if I don't kill the three(four) stones on the left, I'm running out of places to make more territory. Whereas if he gets a play around 'a', he could slide into the lead. |
Author: | drmwc [ Thu Aug 21, 2014 1:48 am ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
My move is almost forced. Black has two main lines after this:
The move at 3 looks like the potentially most entertaining option. In the line showns (there are others) Black's two stones become a target, so my 3 stone group becomes strong. I may take one in a ladder (at the marked point) or immediately launch an attack against the two stones. White is doing reasonably well here. A simpler move for black is one I showed earlier:
Alternatively, black could a line I showed in an earlier diagram. This is more peaceful. Next I have a choiuce of moves, including the marked stones. Saving the stone at the top may leave me a little thin, though. So a possible continutation is:
NExt I will try to fina a moyo-building move. If black omits 4, his top group will become small and possibly even thin. SO maybe black should play at 3 himself.... I'll plan more if this line comes up. |
Author: | EdLee [ Thu Aug 21, 2014 1:53 am ] |
Post subject: | |
Hi drmwc, drmwc wrote:
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Author: | drmwc [ Thu Aug 21, 2014 1:55 am ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
Ed It was a typo. I've edited so hopefully it now makes sense. |
Author: | EdLee [ Thu Aug 21, 2014 1:56 am ] |
Post subject: | |
drmwc, Thanks. |
Author: | Bill Spight [ Thu Aug 21, 2014 2:57 am ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
My prediction: Play will go (already played) - . But then Black will not play . |
Author: | Joaz Banbeck [ Thu Aug 21, 2014 12:50 pm ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
My first reflex is to play 52 like this:
But then he plays the simple tobi, I have to tobi too, and he is getting a moyo:
Besides that, it seems disrespectful to my most recently played stone at H17. |
Author: | Joaz Banbeck [ Thu Aug 21, 2014 9:31 pm ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
Joaz Banbeck wrote: ... I have to tobi too... That may be presumptuous.
It is very difficult to kill that stone without giving black the upper left corner. And really puts a dent in the moyo plans that I'm sure my opponent must be plotting. I must read a lot. So... My next move may take a few days. |
Author: | EdLee [ Fri Aug 22, 2014 12:03 am ] |
Post subject: | |
How about attack ?
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Author: | Joaz Banbeck [ Fri Aug 22, 2014 9:19 am ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
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Author: | Bill Spight [ Fri Aug 22, 2014 11:29 am ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
No prediction now. |
Author: | Joaz Banbeck [ Mon Aug 25, 2014 6:17 pm ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
For observers: Let's take stock of the board. I'll look at territory, strong/weak groups, and influence. I think that those are the things that matter most as we start divvying up the center. POINTS: White has about 10 in the upper left, 15 in the lower left, and about 15 on the right, for a total of about 40 points. Black has 20 in the upper right, 25 in the lower right, and about 15 on the left, for a total of about 60 points. Black is ahead by 20 points. WEAK GROUPS: When looking at weak groups, white has two, black has one. INFLUENCE: I counted the closest stones to the center. There are twenty of them. Eight are his, twelve are mine. Even if my counting is a bit off here, I'm stil ahead.
In summary, I'm ahead by 20 points, I've got fewer weak groups, and I've got about 50% more influence affecting the center where most of the remaining points are. The only thing that I don't have is sente. Let's give my opponent the benefit of the doubt, and assume that he picks the best move on the board - one that gains twenty points, and improves his influence to equal mine. Assuming that such a move is indeed possible, he still has two weak groups to my one, and I will have sente. It seems that he has to save the three stragglers over on the left. If I get them - probably with something like the picket line shown below, I get another 50 points. Even if he gets every remaining point possible in the center, he is not going to get the 70 points needed to catch up.
So maybe he engages in a running fight to save them - and succeeds - and the center of the board becomes a snake pit of intertwined groups where almost everything is dame. That's fine by me: I'm ahead by twenty when it starts, and will probably still be ahead by a few when it ends. Overall, this is looking good for me. ( I haven't mentoned yose here. I haven't attempted to count it, but I see no glaring weaknesses for either side. The only possiblity on is the upper right where my R12 stone still has some aji. And that one uncertainty favors me. ) So, it still looks good for me. The end of the game is getting closer, the temperature is dropping, and opportunities are becoming fewer. Tick...tick...tick... |
Author: | yoyoma [ Mon Aug 25, 2014 8:01 pm ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
Joaz Banbeck wrote: So maybe he engages in a running fight to save them - and succeeds - and the center of the board becomes a snake pit of intertwined groups where almost everything is dame. Except for Black's dead group. |
Author: | Uberdude [ Tue Aug 26, 2014 2:07 am ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
Yeah, black's analysis is all well and good assuming he plays as well as white for the rest of the game. However, if he continues to make bad/slack moves (h2, c8, c4, d8, c16) at the same rate for the next 200 moves as he did for the last 20 white will win easily. However, the board is getting broken up into smaller pieces so, until some complex fighting kicks off, the mistakes will be getting smaller. If white now jumps at f15 (c16 does make this have the e18 weakness though) and black then j16 I could see d12 dying if black over-attacks the 3 stones on the left. Of course if black plays well and white doesn't the 3 white stones could die . |
Author: | drmwc [ Wed Aug 27, 2014 12:50 pm ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
Sorry for the delay in moving - I was at my Gran's 99th birthday party
The move played feels like the urgent area- black gets a lot of thickness is he blocks me in. Because of the urgency of blocking me in, I think B52 is a slight mistake. Next:
Black 2 is likely (although I haven't predicted Joaz's moves well.) Then I am contemplating 3 as shown. Making B weak at the top would be a major success for me. My 3 stones would become strong. Moving out at a would then be a sensible ting to look at. Note the iron pillar move played is a lot stronger than the obvious one point jump.
Black 6 is a standard tesuji in this shape, splitting white into two bits. It may just be playable for me due to the stone at K17, but creating unnecessary weaknesses cannot be a good idea (and black kosumi at j16 is sente since it threatens this sequence). |
Author: | Joaz Banbeck [ Sat Aug 30, 2014 1:18 pm ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
Hmmm... I had expected him to go after my lone stone up top. But he moved straight out. He's trying to kill my left side group. ( I had assumed that blocking at C16 prevented that. ) But it can get ugly really quickly:
Or I can play 4 more aggressively like this:
...which continues like this:
...and this:
That is not good for me. However, if I had a stone at the circled point, it would be much different:
...and that looks good for me. Or this variation is good too:
So I'm going to play E11 first. If he wants to slide under on the left, it still looks ok for me. It also threatens to kill the three stones with F10 if he ignores E11:
And I will get more territory out of the exchange then he will.
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Author: | Uberdude [ Sat Aug 30, 2014 3:41 pm ] |
Post subject: | Re: #231 drmwc vs Joaz Banbeck |
@Joaz You showed a few bad moves for white after your 54. Do you see any good ones? What do you expect drmwc to do? @obs I expect f9 jump. |
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