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Chirag Patel
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Chirag Patel

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Photo of the Day: #YourShot member Martin Nittala photographed these stunt riders on the Wall of Death in India. #photography
Stunt riders in India ride the Wall of Death in this National Geographic Photo of the Day.
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Revenge of the humans

After losing the first three, Lee Sedol won his 4th game against the program AlphaGo!

Lee was playing white, which for go means taking the second move. So, he was on the defensive at first, unlike the previous game, where he played black.

After the first two hours of play, commenter Michael Redmond called the contest "a very dangerous fight.” Lee Sedol likes aggressive play, and he seemed to be in a better position than last time.

But after another 20 minutes, Redmond felt that AlphaGo had the edge. Even worse, Lee Sedol had been taking a long time on his moves, so had only about 25 minutes left on his play clock, nearly an hour less than AlphaGo. Once your clock runs out, you need to make each move in less than a minute!

At this point, AlphaGo started to play less aggressively. Maybe it thought it was bound to win: it tries to maximize its probability of winning, so when it thinks it's winning it becomes more conservative. Commenter Chris Garlock said “This was AlphaGo saying: ‘I think I’m ahead. I’m going to wrap this stuff up. And Lee Sedol needs to do something special, even if it doesn’t work. Otherwise, it’s just not going to be enough.”

On his 78th move, Lee did something startling.

He put a white stone directly between two of his opponent's stones, with no other white stone next to it. You can see it marked in red here. This is usually a weak type of move, since a stone that's surrounded is "dead".

I'm not good enough to understand precisely how strange this move was, or why it was actually good. At first all the commenters were baffled. And it seems to have confused AlphaGo. In the 87th move, AlphaGo placed a stone in a strange position which commentators said was "difficult to understand."

"AlphaGo yielded its own territory more while allowing its opponent to expand his own," said commentator Song Tae-gon, a Korean nine-dan professional go player. "This could be the starting point of AlphaGo's self-destruction."

Later AlphaGo placed a stone in the bottom left corner without reinforcing its territory in the center. Afterwards it seemed to recover, which Song said would be difficult for human players under such pressure. But Lee remained calm and blocked AlphaGo's attacks. The machine resigned on the 180th move.

Lee was ecstatic. "This win cannot be more joyful, because it came after three consecutive defeats. It is the single priceless win that I will not exchange for anything."

"AlphaGo seemed to feel more difficulties playing with black than white," he said. "It also revealed some kind of bug when it faced unexpected positions."

Lee has already lost the match, since AlphaGo won 3 out of the 5 games. But Lee wants to play black next time, and see if he can win that way.

You can play through the whole game here:

http://eidogo.com/#xS6Qg2A9

Even if you don't understand go, it has a certain charm.

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Lee Sedol finally defeats AlphaGo in the fourth game, after three consecutive victories of AlphaGo. Incredible game until it started to be clear that AlphaGo will lose this one. AlphaGo resigns in the end.

#AlphaGo #LeeSudol #Google #DeepMind
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On a more optimistic note...
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Video could have been better though.
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I could relate to this completely (since my brain is little messed up than others!), but you might find some of these counter intuitive. Next time when you face an obstacle, frustration or stress, embrace it... and use it to your advantage!
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Nice video..I will try to do that thing...
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Have him in circles
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Ashish Pardhi's profile photo
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Arijit De's profile photo
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IITian. Googler.
Introduction
I am an intellectually moderately-significant individual among 6.7 billion others of a highly-evolved* species called human originated before around 200000 tropical years** inhabited on a medium-sized planet orbiting around a hum-drum star in the outer suburbs of an ordinary spiral galaxy in some forgotten corner of a universe surrounded by about a million million other galaxies in the observable universe.

On this unimportant planet which is merely tiny dot in vastness of eternity, I have acquired knowledge of currently one of the most popular discipline among our species, which studies the theoretical foundations of information and computation, and of practical techniques for their application and implementation on the so-called revolutionary machines which manipulate data according to a list of instructions. I am currently working for an organization (named after a really big number) which pursues for organizing all the digital information on this planet and making some sense out of it.

I have no idea how much impact I have to the immenseness of the universe or whether I really serve any purpose in this infinity or not. But I hope I can make little difference at least locally on this dot (named earth!).

--
* a species capable of abstract reasoning, language, introspection and problem solving
** according to my star and planet
Work
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  • Google
    Software Engineer, 2010 - present
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