Life In 19x19 http://www.lifein19x19.com/ |
|
Perception of shapes. http://www.lifein19x19.com/viewtopic.php?f=15&t=4784 |
Page 1 of 1 |
Author: | Solomon [ Wed Oct 05, 2011 11:57 am ] |
Post subject: | Perception of shapes. |
Suppose I'm playing one-color Go with someone, and you happen to see this pattern on the board somewhere:
I think I speak for most people that when they see this, they know with reasonable confidence that what my opponent and I played was a common 3-3 invasion joseki. You can see the shape of both colors despite only seeing only one.
Below you will see three 'games' of one-color Go. However, the emphasis will be on the upper left corner. I did not look up some joseki variation in a dictionary, paste it there, and change the black stones to white stones (so this isn't a joseki reverse engineering question). Instead, I just threw some White stones there randomly. What I'm interested in seeing from other people is how they think the whole board, particularly the upper left, looks like if both colors were used. What is the shape you perceive there? You can even try to perceive the shape, then try to reverse engineer your hypothetical corner variation as well for cool beans. Extra credit if you make sure you have the right # of black and white stones ![]()
I'll post my thoughts in a few hours, after class. |
Author: | daniel_the_smith [ Wed Oct 05, 2011 12:13 pm ] |
Post subject: | Re: Perception of shapes. |
Cool idea.
|
Author: | Dusk Eagle [ Wed Oct 05, 2011 12:24 pm ] |
Post subject: | Re: Perception of shapes. |
I'm not so much concerned with getting the number of stones close to even - I'm just posting the pattern that seems most prominent in my mind based on the shape. I also couldn't really guess the other corners, so I focused on the upper-left. 1)
2) Two possibilities for this one:
3)
|
Author: | Li Kao [ Wed Oct 05, 2011 12:24 pm ] |
Post subject: | Re: Perception of shapes. |
Can't find a position with reasonable sequences for any for them. |
Author: | Solomon [ Wed Oct 05, 2011 12:29 pm ] |
Post subject: | Re: Perception of shapes. |
Also, I made this whole board instead of just the corner for two reasons: 1) If you come up with the shape in the corner and you're off by a stone or two, you can just manipulate the colors of the other corner stones to even it out. Of course, you don't need to concern yourself about equal # of black and white stones either. 2) Whole-board thinking. |
Author: | daniel_the_smith [ Wed Oct 05, 2011 12:32 pm ] |
Post subject: | Re: Perception of shapes. |
I originally had this for #3, but changed it because it favored black so heavily. My current one does, too, though. This one looks more natural, though white clearly did something wrong. Dusk Eagle's is better.
|
Author: | hyperpape [ Wed Oct 05, 2011 12:47 pm ] |
Post subject: | Re: Perception of shapes. |
Interesting question, I only have time for one.
I don't think this quite makes sense, but it's what it looks like. I can't see anything but a turtle capture. The second one doesn't look like anything to me--it sorta looked like a pillbox shape with a 3-3 invasion, but I couldn't get all the pieces to fit. The third I'm still thinking about. Something taisha-like shape jumped out at me, but it didn't all fit together. I know it doesn't have to be joseki, but I just thought "how do you have that kind of close fighting" and it's what came to mind. |
Author: | Dusk Eagle [ Wed Oct 05, 2011 12:50 pm ] |
Post subject: | Re: Perception of shapes. |
I realize my first one is ridiculously good for black, and that it favors black by one stone even if white occupies the other three corners (assuming two white captures), but that's just what I see when I look at that shape - it doesn't have to be an even result. If you want, pretend it's a beginner's game and that white thought it was cool that the rules of Go allow you to pass. |
Author: | Solomon [ Wed Oct 05, 2011 12:53 pm ] |
Post subject: | Re: Perception of shapes. |
Or maybe I'll just post now, class is a little slow today. For the first one, the first shape I perceived is marked in red:
Definitely involving a capture of two stones. I can't really explain why this sprung up immediately in my head, especially since I also saw this shape:
So there was a bit of conflict in my mind as to how this shape came about. Eventually I arrived at:
For the second one, I saw extensions:
Where the 'o's were blank stones to me. Another thing I considered was the D13 being an extension and C11 being a pincer attack on the three stones. Eventually I arrived at:
For the third one, what came to me at first glance was:
The 'o's were just blank stones to me, so all I did from there was try to fill in those blank stones as logically as I could:
The next move for White is obvious ![]() |
Author: | jts [ Wed Oct 05, 2011 1:54 pm ] |
Post subject: | Re: Perception of shapes. |
This is fun! ![]()
On this one I saw there had to be a capture. I tried the one space ponnuki, but then the positions of the other stones looked very strange, no matter how you divvied them up. The two space ponnuki worked better, the result looks more "classical" for both sides. Then I came up with a nonsense sequence.
On this one the 3-3 stone looked like the starting place and from there I started by trying the knight's move approach, but C15 always ended up looking nonsensical. Here it just looks like B decided to play an odd sort of probe before strengthening his position.
This pattern just popped out. Then I came up with a sequence while doing the diagram. Doesn't look terribly good for W. |
Author: | jts [ Wed Oct 05, 2011 2:01 pm ] |
Post subject: | Re: Perception of shapes. |
Wow, interesting to see how many different patterns people saw. |
Author: | lightvector [ Wed Oct 05, 2011 7:44 pm ] |
Post subject: | Re: Perception of shapes. |
Here's what I saw. Corners were chosen to even out the colors, not because I actually saw them as one color or the other. First one:
Second one: Actually, in this second one, I have a preference for both of the top star points to be black. Also, unlike the others, I saw a specific stone as being the previous move, which I marked.
Saw two things for the third one.
|
Author: | Joaz Banbeck [ Wed Oct 05, 2011 8:34 pm ] |
Post subject: | Re: Perception of shapes. |
Araban: this is a fascinating idea. ![]() ![]() ![]() ![]() ![]() ![]() #1 seems obvious. #2 is just a guess. #3 seems correct. The outlying stones are almost random, just enough to make the correct numbers.
|
Author: | Marcus [ Thu Oct 06, 2011 11:39 am ] |
Post subject: | Re: Perception of shapes. |
Interesting ... here goes ...
|
Author: | Fredrik [ Fri Oct 07, 2011 7:02 pm ] |
Post subject: | Re: Perception of shapes. |
Really cool idea Solomon! For me, this "experiment" was all about the order of moves. It's not difficult at all to create countless of different plausible shapes when you get 10-30 stones to do whatever you want with, the challenge lies within making a sequence that seems "almost" logical. The first shape that was given to us was,
The most sensible shape to me was;
The stone marked with "1" was obviously some kind of pincering attempt. While Black made a thick shape, white secured his position on the leftside. The result seems like something that could have been played in a real game, so let's try to recreate it. At first, I tried to experiment with
But I found it hard to justify white ever playing the pincer at "a", so I instead tried a different approach:
While the play is still a bit unorthodox, I think these moves could possibly be played in a real game. At least, no move like completetly ridiciolous, which I kinda of has to be satisfied with ![]() The second shape that was given to us;
First of all, this position is a bit ridiculous, and such, there will be impossible to create the position without doing any unatural move. The main problem with the current position is that it's extremly hard to justify the 1 and 3 stones, as they look awkwardly placed. They can absolutely not be the same color, as why would anyone make a pillar in that part of the board? It's completetly inefficient if both those stones are the same color. For me, this result clearly came from some kind of san-san. The first feeling when trying to create this shape was something like this:
But it does not look very good, especially 5 and 6 looks terrible. So I tried to try a more "aggressive" response from the players ^^
White 6 is not such a great move, but it can be described as an attempt to cut Black. Black 7 might be a bit of an overplay as a response, but it try to create some sabaki by using the aji of 3. I didn't find any better logical sequence, because of above reasons. The last shape, a lot of stones to work with ![]()
The first I immediately identifed was,
This shape is possible to make, however the additional stones at ab make any kind of "avalanche" hard to make. My next thought was another "semi-joseki" starting with 4 and 6 as keymoves. White 9 would of course be strange which makes it a bit hard. (next a b c, why would white ever play c? Thus this variation was not possible either.
However, I really want to make this psuedo-avalanchish shape to work. So I worked out this sequence finally. Black is active! ![]()
This sequence feels quite plausible, and a complicated fight will start. White feels perhaps a bit better but Black has three unplayed corners. "Summing it up": First of all, these we're not all shapes I considered. But as I mentioned earlier my objective was to make some kind of logical sequence leading up to the positions. I'm sure there is a lot of other possibillites as well. I was really suprised how easy it was to read out different sequences. To be honest, it was easier than reading normally. I guess it might be because at least there are stones on the board, so all I have to do is read different move orders leading up to the situation, and the stones are already on the board. (I didn't find it hard at all to imagine that some white stones were actually Black) [/go] |
Author: | gogameguru [ Sun Oct 09, 2011 9:35 pm ] |
Post subject: | Re: Perception of shapes. |
Interesting idea.
In the last one it looks like someone started a ko too early. I thought of some plausible move orders, but they all involved playing one or more questionable moves. |
Author: | Mef [ Sat Oct 22, 2011 7:23 pm ] |
Post subject: | Re: Perception of shapes. |
The thread might be a little dormant, but I think this concept is pretty cool so I figured I'd give it a shot... I took the "look for a sequence" route -- #1
First shape that jumped out at me for the upper left was ![]() ![]() #2
For #2: The first thing that jump sout to me was the ![]() ![]() ![]() ![]() ![]() ![]() The other option I thought of was this, but I think it might have a couple more moves feeling strange:
For board #3 I must admit, nothing jumped out at me, so I went ahead and looked at what some others had guessed (= , some nice ideas earlier in the thread! |
Page 1 of 1 | All times are UTC - 8 hours [ DST ] |
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group http://www.phpbb.com/ |