Apparently it is also rumoured to have beaten a "strong" pro (top 10 in China).

look at games with daxiang - it should be chinese 6P

Couldn't thought about this in last year

Why is zen not playing on KGS anymore?

They found out all they needed to know about version 12.4, so until they are ready with 12.5 why play more games?

_________________
Dave Sigaty
"Short-lived are both the praiser and the praised, and rememberer and the remembered..."
- Marcus Aurelius; Meditations, VIII 21

version 12.5 is already playing in computer go server, so maybe on KGS soon?

Looking at the 'recent games' list on CGOS, it does not seem that 12.5 can consistently win against 12.4, so maybe it will be a while yet.

_________________
Dave Sigaty
"Short-lived are both the praiser and the praised, and rememberer and the remembered..."
- Marcus Aurelius; Meditations, VIII 21

Seems like they went backwards with that update.

Next to Zen v12.5 name is "1c0g". Maybe that means that Yamato san is using 1 CPU and 0 GPU i.e. not using value network thus causing it to play weaker?

Here is the server people are talking about: http://www.yss-aya.com/cgos/19x19/standings.html
Zen 12.5's results: http://www.yss-aya.com/cgos/19x19/cross ... -1c0g.html

12.5 is 17 wins 16 losses to 12.4, so I don't think you can say it's weaker. 12.4 uses the same naming "1c0g", so I guess they are using the same hardware. If you're going by ratings, 12.5 is a little below 12.4 but it's just because 12.5 hasn't played enough games yet. Probably it's rating will get closer to 12.4 after some more games.

Maybe it was wrong to say weaker, but their policy nets are of a very similar strength. When I was reviewing their games, all those moves seemed very good. But I guess, as you said, they need to play many more games in order to have some statistically relevant analysis. As of this moment v12.5 has less than 50% winrate against v12.4, though it's "just" 1c0g hardware.

Why should Zen play on KGS? Zen is already number 1 on KGS. Zen should play stronger players. Which servers have stronger players? Can Zen play in human tournaments?

In Bayesian Elo page that updated daily instead of real time, 12.5 is now 'slicely' better than 12.4 from 398 games (as I'm writing this 12.5 has played 402 games) http://www.yss-aya.com/cgos/19x19/bayes.html

Anyway, it's interesting that Zen seems struck at the level around AlphaGo v13. Maybe what DeepMind did to AlphaGo from v.13 to v.18 (to now) is like a secret sauce (main dish is Nature paper). Surprise me, Yamato

I wouldn't say "stuck" when it doesn't get stronger over 2 weeks and a minor version release... Yes I expect diminishing returns, but I see no reason for pessimism over Zen's remarkable rate of improvement yet.

I am not up to date on everything that has been published. Is the Zen = AlphaGo v13 claim based on anything other than hand waving by the AlphaGo team?

_________________
Dave Sigaty
"Short-lived are both the praiser and the praised, and rememberer and the remembered..."
- Marcus Aurelius; Meditations, VIII 21

It's probably somewhat based on the way it beat up a load of KGS 9 dans (who are probably around or even above Fan Hui's level), though this does come with the online fast game caveat.