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Oh man overblown article. Fan Hui is 2p, so very skilled, but the ranking system goes up to 9p. To give a sense of how large a gap that is, there is and has on

Oh man overblown article. Fan Hui is 2p, so very skilled, but the ranking system goes up to 9p. To give a sense of how large a gap that is, there is and has only ever been one Westerner to achieve that rank, Michael Redmond. The article states they plan to face off against Lee Sedol 9p, and if they beat him in a no-handicap game, that will be as impressive as Deep Blue against Kasparov. You'll want to watch this year's Computer Go UEC Cup[0] in March, with Zen and CrazyStone being the typical victors. (CrazyStone in particular has sustained a 6d rating on KGS, a popular Go server, but lately has been at 5d. In the past it has beaten a 9p with a 4 stone handicap, which is impressive, but that handicap is huge and it hasn't yet won with 3 stones.) Of interest this year is that Facebook is competing, and AFAIK they seem to take a similar approach as Google by training the AI using deep learning techniques and then strengthening it further with MCTS. In their public disclosures they claim to beat Pachi pretty often, which puts their bot around 4d-6d, it'll be interesting to see how it fairs against Zen and CrazyStone in the Cup and if it wins against a 9p. [0] http://jsb.cs.uec.ac.jp/~igo/eng/ http://jsb.cs.uec.ac.jp/~igo/eng/

Inufu 11y ago
The version of AlphaGo used in the paper beats CrazyStone about 99% of the time. Even if we give CrazyStone 4 stones handicap, AlphaGo still beats it 80% of the time.
- cobaltblue 11y ago
  Very nice. How come you guys didn't enter the UEC Cup? (Edit: rereading this it kind of sounds snarky, not meant that way. Really impressive if you can kick CrazyStone's teeth in...)
- thomasahle 11y ago
  Is that with 1200CPU's?
  - mlindner 11y ago
    From the paper, no that's with "single machine AlphaGo" which is 48 CPUs and 8 GPUs. Distributed AlphaGo beats Single Machine AlphaGo 77% of the time. (Distributed AlphaGo being 1202 CPUs and 176 GPUs.)
    - thomasahle 11y ago
      It beats single machine alpha go 77% of the time with four stones handicap. Right?
      - w0bb13 11y ago
        Looks like the other way round - single machine alphago wins 77% of the time, when it gives 4 stones handicap.
ewanmcteagle 11y ago
This is not correct. In the professional ranks 1p is often no weaker than 9p because often the young players start out at 1p and are very strong because selection pressure is much greater. The 9p rank in Japan also came partly out of just playing a lot for a lot of years so that accomplishment was not as great as it seems. In any case, active professional players for the most part are not dramatically stronger than one another. The range for the most part is about 2 stones, maybe 3. Even though Fan Hui is not an active professional in the traditional sense this is an absolutely huge accomplishment and leap in playing ability by computers. BTW, Michael Redmond is not particularly strong by professional standards. (Edit: The correlation between strength and rank now as noted below is due to promotions more often coming from acheivements: If you win at X you get promoted to 7p immediately, if you win at Y you get promoted to 9p. You cannot win a big tournament and keep your low rank. Here is an example of someone who went from 3p to 9p in one match: https://en.wikipedia.org/wiki/Fan_Tingyu https://en.wikipedia.org/wiki/Fan_Tingyu. But professionals cannot give each other 6 stone handicaps when one is 9p and the other is 3p)
- hyperpape 11y ago
  I feel like this is mostly misleading. Look at a list of top players (goratings.org). The top fifty is mostly players 5p and up. There are a few 3p or 4p Chinese players running around, and apparently even 1 1p (Li Qincheng) but by and large, there is a relation.
  - hokkos 11y ago
    The beaten player is ranked 633 (Fan Hui).
    - hyperpape 11y ago
      Yes. He's a case where you'd make exactly the right assumption if just told his rank. Though I should warn: as a low level pro who moved to Europe, this database has very little data on him. His European results indicate that he's stronger than Pavol Lisy, Alexander Dinerstein, and Mateusz Surma, who all rate higher than him here.
tel 11y ago
It's worth clarifying your use of the "p" rating scale alongside the "dan" rating scale. Essentially, there's an "amateur dan" scale which is what's measured on public servers like KGS. Under this scale essentially all professional Go players rank at the maximum rank, 9 dan. In parallel there's the professional ranking system which also uses the title "dan" but is bestowed by the professional Go associations of every country. These rankings are symbolic instead of quantified, although generally higher professional dan ranks cannot be anything but corresponding to higher skill. So, a "European 2d" is a professional rank which may or may not have a good translation into a quantitative scale like ELO or "KGS dan" (I actually don't know). Generally, my understanding is that European professional rankings lag behind Asian ones as well by some amount.
- hyperpape 11y ago
  You're generally accurate, except that Fan Hui is a Chinese 2p from the Chinese Pro Association who has played in Europe for several years. He's still generally a bit stronger than the homegrown European professionals.
  - tel 11y ago
    Ah, gotcha! Didn't realize his rank was from the Chinese association.
efuquen 11y ago
I don't think it's overblown at all. They make it clear he is the European champion and never imply he is the best player in Go, just obviously very good. Looks like he has won the last 3 European championships in a row (https://en.wikipedia.org/wiki/European_Go_Championship https://en.wikipedia.org/wiki/European_Go_Championship). Overall I think it was a well balanced article highlighting an impressive achievement, not sure why you felt the need to diminish it as not significant?
baby 11y ago
> In the past it has beaten a 9p with a 4 stone handicap, which is impressive, but that handicap is huge and it hasn't yet won with 3 stones 4 stones is a huge handicap? 4 stones is a huge handicap if he was playing against a 6p maybe. But with 4 stones handicap anything near 2-4p would still have a hard time.
- Rylinks 11y ago
  Pro ranks are much closer than amature ranks. The difference between a 9p and 6p is probably less than one stone, and definitely less than three.
Teodolfo 11y ago
Do you realize that AlphaGo has a 77% win rate against CrazyStone with a four stone handicap? It is far far stronger than CrazyStone and Zen.

Inufu 11y ago

The version of AlphaGo used in the paper beats CrazyStone about 99% of the time. Even if we give CrazyStone 4 stones handicap, AlphaGo still beats it 80% of the time.

cobaltblue 11y ago
Very nice. How come you guys didn't enter the UEC Cup? (Edit: rereading this it kind of sounds snarky, not meant that way. Really impressive if you can kick CrazyStone's teeth in...)
thomasahle 11y ago
Is that with 1200CPU's?
- mlindner 11y ago
  From the paper, no that's with "single machine AlphaGo" which is 48 CPUs and 8 GPUs. Distributed AlphaGo beats Single Machine AlphaGo 77% of the time. (Distributed AlphaGo being 1202 CPUs and 176 GPUs.)
  - thomasahle 11y ago
    It beats single machine alpha go 77% of the time with four stones handicap. Right?
    - w0bb13 11y ago
      Looks like the other way round - single machine alphago wins 77% of the time, when it gives 4 stones handicap.

ewanmcteagle 11y ago

This is not correct. In the professional ranks 1p is often no weaker than 9p because often the young players start out at 1p and are very strong because selection pressure is much greater. The 9p rank in Japan also came partly out of just playing a lot for a lot of years so that accomplishment was not as great as it seems. In any case, active professional players for the most part are not dramatically stronger than one another. The range for the most part is about 2 stones, maybe 3. Even though Fan Hui is not an active professional in the traditional sense this is an absolutely huge accomplishment and leap in playing ability by computers. BTW, Michael Redmond is not particularly strong by professional standards. (Edit: The correlation between strength and rank now as noted below is due to promotions more often coming from acheivements: If you win at X you get promoted to 7p immediately, if you win at Y you get promoted to 9p. You cannot win a big tournament and keep your low rank. Here is an example of someone who went from 3p to 9p in one match: https://en.wikipedia.org/wiki/Fan_Tingyu https://en.wikipedia.org/wiki/Fan_Tingyu. But professionals cannot give each other 6 stone handicaps when one is 9p and the other is 3p)

hyperpape 11y ago
I feel like this is mostly misleading. Look at a list of top players (goratings.org). The top fifty is mostly players 5p and up. There are a few 3p or 4p Chinese players running around, and apparently even 1 1p (Li Qincheng) but by and large, there is a relation.
- hokkos 11y ago
  The beaten player is ranked 633 (Fan Hui).
  - hyperpape 11y ago
    Yes. He's a case where you'd make exactly the right assumption if just told his rank. Though I should warn: as a low level pro who moved to Europe, this database has very little data on him. His European results indicate that he's stronger than Pavol Lisy, Alexander Dinerstein, and Mateusz Surma, who all rate higher than him here.

tel 11y ago

It's worth clarifying your use of the "p" rating scale alongside the "dan" rating scale. Essentially, there's an "amateur dan" scale which is what's measured on public servers like KGS. Under this scale essentially all professional Go players rank at the maximum rank, 9 dan. In parallel there's the professional ranking system which also uses the title "dan" but is bestowed by the professional Go associations of every country. These rankings are symbolic instead of quantified, although generally higher professional dan ranks cannot be anything but corresponding to higher skill. So, a "European 2d" is a professional rank which may or may not have a good translation into a quantitative scale like ELO or "KGS dan" (I actually don't know). Generally, my understanding is that European professional rankings lag behind Asian ones as well by some amount.

hyperpape 11y ago
You're generally accurate, except that Fan Hui is a Chinese 2p from the Chinese Pro Association who has played in Europe for several years. He's still generally a bit stronger than the homegrown European professionals.
- tel 11y ago
  Ah, gotcha! Didn't realize his rank was from the Chinese association.

efuquen 11y ago

I don't think it's overblown at all. They make it clear he is the European champion and never imply he is the best player in Go, just obviously very good. Looks like he has won the last 3 European championships in a row (https://en.wikipedia.org/wiki/European_Go_Championship https://en.wikipedia.org/wiki/European_Go_Championship). Overall I think it was a well balanced article highlighting an impressive achievement, not sure why you felt the need to diminish it as not significant?

baby 11y ago

> In the past it has beaten a 9p with a 4 stone handicap, which is impressive, but that handicap is huge and it hasn't yet won with 3 stones 4 stones is a huge handicap? 4 stones is a huge handicap if he was playing against a 6p maybe. But with 4 stones handicap anything near 2-4p would still have a hard time.

Rylinks 11y ago
Pro ranks are much closer than amature ranks. The difference between a 9p and 6p is probably less than one stone, and definitely less than three.

Teodolfo 11y ago

Do you realize that AlphaGo has a 77% win rate against CrazyStone with a four stone handicap? It is far far stronger than CrazyStone and Zen.