>-----Original Message----- >From: [EMAIL PROTECTED] >To: computer-go@computer-go.org >Sent: Sat, 7 Apr 2007 9:05 PM >Subject: [computer-go] The physics of Go playing strength.
>A few weeks ago I announced that I was doing a long term >scalability study with computer go on 9x9 boards. > >I have constructed a graph of the results so far: > > http://greencheeks.homelinux.org:8015/~drd/public/study.jpg > > I am still collecting data, I feel that I have >enough samples to report some results - although I will >continue to collect samples for a while. > >This study is designed to measure the improvement in >strength that can be expected with each doubling of computer >resources. Thank you, Don, for doing all this work. When you started this study, I was expecting to see the strength increase level off dramatically. Instead, it keeps going, just as you predicted. Very interesting result. > 5. GnuGo 3.7.9 is not competive with the higher levels of > Lazarus. However, what the study doesn't show is that > Lazarus needs 2X more thinking time to play equal to > GnuGo 3.7.9. >... >Based on this type of analysis and the physics analogy, >GnuGo 3.7.9 is a stronger program than Lazarus (even at 9x9 >go). Lazarus requires about 2X more time to equalize. So >Lazarus plays with less "force" (if you use the physics >analogy) and needs more TIME to get the same amount of work >done. I question whether it's valid to make this kind of comparison when Gnugo scales so differently from UCT. If you froze one of the UCT prgrams at 1 million playouts/move and then tried to scale gnugo until it matched that level of strength, that might not even be possible. I think you need to compare 2 curves (as you're doing with the lite and heavy UCT programs), not one curve and one fixed point. - Dave Hillis ________________________________________________________________________ Check Out the new free AIM(R) Mail -- 2 GB of storage and industry-leading spam and email virus protection.
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