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AlphaGo beats Lee Sedol again in match 2 of 5

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Re: AlphaGo beats Lee Sedol again in match 2 of 5

#501
post #49

I find it very interesting that to a layperson, the idea of a computer being able to beat a human at a logic game is pretty much expected and uninteresting. You try and share this story with a non-technical person and they will likely say "Well, duh..it's a computer".

As always, there is a relevant XKCD about this phenomenon.

http://xkcd.com/1425/

Re: AlphaGo beats Lee Sedol again in match 2 of 5

#502

Let's compare Go and Chess. We all know that Go is more complex that Chess, but how much more? There's 10^50 atoms in the planet Earth. That's a lot. Let's put a chess board in each of them. We'll count each possible permutation of each of the chess boards as a separate position. That's a lot, right? There's 10^50 atoms, and 10^40 positions in each chess board so that gives us 10^90 total positions. That's a lot of p…

Why am I feeling a bit scared of all this ?

The oldest and strongest emotion of mankind is fear, and the oldest and strongest kind of fear is fear of the unknown. -- H.P. Lovecraft

Re: AlphaGo beats Lee Sedol again in match 2 of 5

#503
post #172

What I really liked about those games so far, and Michael Redmond commentary, is that AlphaGo not only beat Lee Sedol twice, but also Redmond. He is playing the same style as Sedol, he constantly predicts Sedol's moves and he is as surprised and does the same miscalculations as Sedol. He really needs some time to find out when he made a mistake, the same mistake Sedol was eventually doing. This is high class commenta…

I watched both days' commentary and does it have a lot of cuts and skips? Or is something wrong with my internet?

Re: AlphaGo beats Lee Sedol again in match 2 of 5

#504
post #239

As someone who studied AI in college and am a reasonably good amateur player, I have been following the matches between Lee and AlphaGo. AlphaGo plays some unusual moves that go clearly against any classically trained Go players. Moves that simply don't quite fit into the current theories of Go playing, and the world's top players are struggling to explain what's the purpose/strategy behind them. I've been giving it…

[deleted]

Re: AlphaGo beats Lee Sedol again in match 2 of 5

#505
I wonder how this will affect future human play. About 30 years ago my brother and I started playing a simple African stone game Kala. We each won about half the games until I coded up a brute force search to play against. Given a game tree to the end, the program made the weirdest looking opening move, when playing first. I started making that move and forever after won.

The situation with Go is different. (I wrote the Go program Honninbo Warrior in the 1970s, so I am a Go player and used to be a Go programmer.) Still, I bet the AlphaGo, and future versions, will strongly impact human play.

Maybe it was my imagination, but it sometimes looked like Lee Sedol looked happy + interested even late in the two games when he knew he was losing.

Re: AlphaGo beats Lee Sedol again in match 2 of 5

#506
post #459
post #333

Earlier quoted context omitted.

I'm not a Go player but play other competitive sports. Humans have a herd mentality...as Op mentioned there's certain styles of playing...which has their own strengths and weaknesses. Sometimes people will not examine other styles that may have better strengths and just focus on the exist one. Then comes along someone who 'thinks outside the box' with a new style and revolutionize the playing field. Think Bruce Lee a…

> AlphaGO is the best at playing Go. Maybe humans can devise a better style and defeat AlphaGo, but I'm sure AlphaGo can adapt easily if another style exists. Which is a curious point. The gripes about early brute force search algorithms (e.g. Deep Blue?) were that they felt unnature. However, as the searches get more nuanced and finely grained, is there a point at which a fast machine begins doing fast stupid machin…

It has been said that a game of Go is a conversation with moves in different areas showing disagreement. The game is also known as 'shou tan' (hand talk). From the commentary, AlphaGO is currently passing the Go Turing Test in almost all cases. There are some moves which some say are uncharacteristic, then later play out well. Or so called mistakes not affecting the outcome of the match. One explanation given was that AlphaGo optimizes for a win, not win by greatest margin, which is a/most valid for human or machine.

Re: AlphaGo beats Lee Sedol again in match 2 of 5

#507
post #354
post #239

As someone who studied AI in college and am a reasonably good amateur player, I have been following the matches between Lee and AlphaGo. AlphaGo plays some unusual moves that go clearly against any classically trained Go players. Moves that simply don't quite fit into the current theories of Go playing, and the world's top players are struggling to explain what's the purpose/strategy behind them. I've been giving it…

I think AlphaGo is playing very natural go! The 5th move shoulder hit that is the subject of so much commentary would fit into the theory of go that players like Takemiya espouse. It has chosen to emphasize influence and speed and has not been afraid to give solid territory early in the games so far. It's very exciting play but not inhuman play, and if professionals are allowed to train with AlphaGo it will surely us…

It didn't look like a Takemiya-style move to me. Takemiya tends to play for a huge moyo in the center. AlphaGo had no such moyo. It wasn't only a strange move; it was also a strange time to play it, and it definitely went against conventional wisdom.

Re: AlphaGo beats Lee Sedol again in match 2 of 5

#508
post #216

Earlier quoted context omitted.

> I should also say that it's somewhat clear that Sedol made one suboptimal move, and AlphaGo capitalized on it. Can you please indicate this time in the video of the game? Thanks a lot.

I watched the live stream commentated by Myungwan Kim so I know what the parent is referring to (later in the game, Myungwan Kim referred back to that possibly being a mistake), although not being a Go player myself most of it was over my head. It was fairly early in the game and about 4-5 lines down from the top and towards the center, center-left. Apparently, Lee Sedol played a little conservatively and "didn't tak…

Thanks. That did the job.

Re: AlphaGo beats Lee Sedol again in match 2 of 5

#509
This will be buried by now but:

What happens if the Go master tries to deceive the oponent? As in purposefully play a counter-intuitive position, or even "try to lose"? Will the AI's response be confused as it is expecting rational moves from its oponent?

Re: AlphaGo beats Lee Sedol again in match 2 of 5

#510

Someone somewhere asked why a lot of people in the Go community is taking this in a somewhat hard way, here is my hypothesis: Go, unlike Chess, has deep mytho attached to it. Throughout the history of many Asian countries it's seen as the ultimate abstract strategy game that deeply relies on players' intuition, personality, worldview. The best players are not described as "smart", they are described as "wise". I thin…

Now go read "The Player of Games", by Iain M. Banks, to see that idea taken to extremes.

To me the book was always about Go taken to the extreme. The Game is the Empire and visa-versa. Imagine if Japan had been more dominate in previous war, then conquered space - then you had the Player of Games.
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