[computer-go] FooBar

2007-12-21 Thread Don Dailey
I've been playing with an alpha beta searcher to see if it's feasible using play-outs as an evaluation function in a program that does an alpha beta global search. I'm using the heavy play-out version of Lazarus and doing tests of up to 3 ply searches on 9x9. The old 1500 ELO rated AnchorMan is a

Re: [computer-go] ELO Ratings of move pattern

2007-12-21 Thread Rémi Coulom
Jason House wrote: Given that doing one parameter at a time may be less ideal, I don't know if my method would really inherit those properties or not. Probably not, because the Hessian has significant non-diagonal values. But I expect it would still converge in less iterations than MM.

Re: [computer-go] ELO Ratings of move pattern

2007-12-21 Thread Jason House
On Dec 21, 2007 10:03 AM, Álvaro Begué <[EMAIL PROTECTED]> wrote: > I am sure MM is a perfectly good algorithm for this purpose, but it has > the serious down side that I don't understand it. :) I do understand the > general idea behind it and how it works in some simple cases, but I don't > know

Re: [computer-go] ELO Ratings of move pattern

2007-12-21 Thread Jason House
On Dec 21, 2007 8:53 AM, Rémi Coulom <[EMAIL PROTECTED]> wrote: > Hi, > > Minorization-maximization is a simple optimization method, and I agree > that it is likely that more efficient algorithms can be applied. > > Newton's method implies estimating the inverse of the Hessian matrix. > Really com

Re: [computer-go] ELO Ratings of move pattern

2007-12-21 Thread Álvaro Begué
On Dec 21, 2007 8:53 AM, Rémi Coulom <[EMAIL PROTECTED]> wrote: > Hi, > > Minorization-maximization is a simple optimization method, and I agree > that it is likely that more efficient algorithms can be applied. > > Newton's method implies estimating the inverse of the Hessian matrix. > Really com

Re: [computer-go] ELO Ratings of move pattern

2007-12-21 Thread Rémi Coulom
Hi, Minorization-maximization is a simple optimization method, and I agree that it is likely that more efficient algorithms can be applied. Newton's method implies estimating the inverse of the Hessian matrix. Really computing the inverse has a cost cubic in the size of the matrix, so it is