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Lee Sedol Beats AlphaGo in Game 4

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Re: Lee Sedol Beats AlphaGo in Game 4

#11

Post by mikeyouse »

Relevant tweets from Demis;

    Lee Sedol is playing brilliantly! #AlphaGo thought it
    was doing well, but got confused on move 87. We
    are in trouble now...

    Mistake was on move 79, but #AlphaGo only came to
    that realisation on around move 87

    When I say 'thought' and 'realisation' I just mean the
    output of #AlphaGo value net. It was around 70% at
    move 79 and then dived on move 87

    Lee Sedol wins game 4!!! Congratulations! He was
    too good for us today and pressured #AlphaGo into
    a mistake that it couldn’t recover from
From: https://twitter.com/demishassabis

Re: Lee Sedol Beats AlphaGo in Game 4

#15

Post by greenyoda »

shadowmint wrote: post #5
_snydly wrote: post #3

Was it AlphaGo losing the game, or Lee Sedol winning it?

Given the number of errors by the AlphaGo in the last 10 minutes, probably the former.

I think Lee Sedol won the game earlier by destroying AlphaGo's territory in the center. The commentator (Michael Redmond) was quite impressed with what he did there.

Re: Lee Sedol Beats AlphaGo in Game 4

#17

Post by awwducks »

Lee Sedol definitely did not look like he was in top form there. I would say (as an amateur) his play in Game 2 was far better. It was the funky clamp position that perhaps forced AlphaGo to start falling apart this game. [0]

I wonder if Lee Sedol can find a way to replicate that in Game 5.

[0]: https://twitter.com/demishassabis/status/708928006400581632

Re: Lee Sedol Beats AlphaGo in Game 4

#19

Post by _snydly »

Crazywater wrote: post #12
_snydly wrote: post #3

Was it AlphaGo losing the game, or Lee Sedol winning it?

According to the head of DeepMind, AlphaGo made a mistake in evaluating move 79: https://twitter.com/demishassabis/status/708928006400581632

> Mistake was on move 79, but #AlphaGo only came to that realisation on around move 87

That's cool to think of AlphaGo having "realizations"

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