Re: [computer-go] Negative result on using MC as a predictor

2009-06-05 Thread Mark Boon
I've also tried a variety of ways to use point-ownership in combination with RAVE. By no means was it an exhaustive study, but I failed to find an intuitive way to improve play this way. I didn't try enough to be able to come to hard conclusions, but at the very least it didn't turn out to be obvi

Re: [computer-go] Negative result on using MC as a predictor

2009-06-05 Thread dhillismail
I took a look at this once, testing?how well ownership maps predicted?the moves chosen in a large set of pro games. Ownership maps have some tricky artifacts, especially for forced moves. Consider a position, with white to move,?where black's previous move put a white group in atari, and whit

Re: [computer-go] Negative result on using MC as a predictor

2009-06-05 Thread Don Dailey
When I complete the new server, I hope that it will be easier to collect larger samples of games. I think this will help the situation a little. There will be multiple time controls, but they will be in sync, so that your program can always play in a shorter time control game without missing a g

Re: [computer-go] Negative result on using MC as a predictor

2009-06-05 Thread Peter Drake
On Jun 5, 2009, at 6:39 AM, Brian Sheppard wrote: In a paper published a while ago, Remi Coulom showed that 64 MC trials (i.e., just random, no tree) was a useful predictor of move quality. In particular, Remi counted how often each point ended up in possession of the side to move. Which p

Re: [computer-go] Negative result on using MC as a predictor

2009-06-05 Thread Magnus Persson
Hi Brian! In my tests with Valkyria I have something like a 4-5% improvement in winrate against gnugo using ownership. But I think you need to be much more careful in how you test these things. Testing on CGOS is a no-no for me, because the opposition changes from hour to hour, so unless