Re: [computer-go] Leela experiment with 6x6

2008-10-03 Thread Magnus Persson
I checked these variation myself and with valkyria and it seems to be sensible. -Magnus Quoting Don Dailey [EMAIL PROTECTED]: I took all the games played by Leela in my 6x6 experiment and applied mini-max to them, taking the statistics at various depths into the games. Don't know if there

Re: [computer-go] Leela experiment with 6x6

2008-10-03 Thread Don Dailey
Thanks. - Don On Fri, 2008-10-03 at 11:56 +0200, Magnus Persson wrote: I checked these variation myself and with valkyria and it seems to be sensible. -Magnus Quoting Don Dailey [EMAIL PROTECTED]: I took all the games played by Leela in my 6x6 experiment and applied mini-max to

RE: [computer-go] Congratulations to David Fotland!

2008-10-03 Thread David Fotland
Currently Many Faces' strength peaks at 32 cores, and goes down with more. On a single core, strength increases 50 to 80 ELO points per doubling of performance. On multiple processors the rate of increase is much less. The increase is very sensitive to communication latency, so a [EMAIL

RE: [computer-go] 7.5-komi for 9x9 in Beijing

2008-10-03 Thread David Fotland
It seems likely now that the correct komi for 9x9 is 7.0. If so, I'd prefer 6.5 komi to 7.5, since 6.5 would have black winning most games, and most other games have a first player advantage. This would give 9x9 go a similar first player advantage. David -Original Message- From: [EMAIL

RE: [computer-go] On ranks 2 and 3 of 9x9 in Beijing

2008-10-03 Thread David Fotland
No. on 9x9 without sekis, the score must be odd, 5, 7, or 9. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Antonin Lucas Sent: Thursday, October 02, 2008 12:16 PM To: computer-go Subject: Re: [computer-go] On ranks 2 and 3 of 9x9 in Beijing On Thu, Oct 2, 2008 at 6:13 PM,

RE: [computer-go] 7.5-komi for 9x9 in Beijing

2008-10-03 Thread Don Dailey
I had heard somewhere that there are some who believe 8.0 is the right komi for 9x9 Chinese. I personally believed for a long time it was 7.0 based on statistical data of games.However that can be misleading. I noticed with CGOS data that White has a very slight edge with 7.5 but I also

RE: [computer-go] On ranks 2 and 3 of 9x9 in Beijing

2008-10-03 Thread Don Dailey
So are you saying that you can get even scores, but most of the games will have odd scores? So it's possible for the correct komi to be even if best play must result in a seki situation? - Don On Fri, 2008-10-03 at 05:29 -0700, David Fotland wrote: No. on 9x9 without sekis, the score must

RE: [computer-go] Congratulations to David Fotland!

2008-10-03 Thread David Fotland
Microsoft just released Windows HPC server 2008, a server operating system for high performance clusters. Their MPI implementation is about 10% faster than Linux on the huge machines with thousands of cores. I'm working with the Microsoft HPC group. They have been exceptionally helpful. David

RE: [computer-go] On ranks 2 and 3 of 9x9 in Beijing

2008-10-03 Thread David Fotland
Yes. An even score requires a seki with an odd number of neutral (uncounted) points. So even komi is possible, but unlikely since very few games end with seki, unless the score is very unbalanced. David -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of

Re: [computer-go] Using playouts for more than position evaluation?

2008-10-03 Thread Claus Reinke
For instance, if an intersection belongs to the same colour in all playouts, chances are that it is fairly secure (that doesn't mean one shouldn't play there, sacrifices there may have an impact on other intersections). Ok, that one was well know (ownership maps, territory

Re: [computer-go] Using playouts for more than position evaluation?

2008-10-03 Thread Peter Drake
We've got some decent results (or at least interesting pictures) by looking at the correlation between controlling a particular point and winning the game. Peter Drake http://www.lclark.edu/~drake/ On Oct 3, 2008, at 7:47 AM, Claus Reinke wrote: Do these make sense? And are there other

[computer-go] Bad effect when tree node limit reached

2008-10-03 Thread Michael Williams
My engine is basic UCT+MC. I've been letting it ponder on small empty boards with a certain komi to see if it begins to converge to the correct position value. It does as long as the tree is allowed to grow. But as soon as the tree reaches its node limit (with simulations continuing), the

Re: [computer-go] Bad effect when tree node limit reached

2008-10-03 Thread Olivier Teytaud
Hi; the node limit is a hard limit on the number of nodes ? if yes, when you reach this limit, what do you do - you remove some nodes with small number of simulations ? Olivier My engine is basic UCT+MC. I've been letting it ponder on small empty boards with a certain komi to see if it begins