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Radim on March 10, 2016 | parent | context | favorite | on: AlphaGo beats the world champion Lee Sedol in firs...

Yes, AlphaGo's progress is amazing. I don't think there's any disagreement there :)

But I don't think you know much about Go, if you can say Fan Hui is "just" 2 dan professional. What do you reckon the strength difference is between 2p and 9p?

Nitpick: while AlphaGo today is certainly stronger than AlphaGo last October, it doesn't follow in any way from the fact that both programs beat their respective opponents. A > B, C > D, D > B, therefore C > A? By "400 ELO", no less?

habosa on March 10, 2016 [–]

https://en.wikipedia.org/wiki/Go_ranks_and_ratings#Elo-like_...

You can use that table to calculate the win probability for a 9dan player versus a 2dan player.

Radim on March 16, 2016 | [–]

I rest my case.

For your info: professional ranks do not reflect strength. They are honorary and based (typically) on achievement and seniority.

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