Search found 14 matches

by Hrvoje Horvatic
Wed Dec 10, 2014 10:06 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Eval tuning - any open source engines with GA or PBIL?
Replies: 5
Views: 2162

Re: Eval tuning - any open source engines with GA or PBIL?

Hello Thomas... iCE uses PBIL for tuning. I don't publish its source but the source would be of no use to you anyway, as the tuning algorithm runs outside of the engine. First of all, let me congratulate you on the progress of your iCE chess engine... It's nice to see new engines like Texel and iCE,...
by Hrvoje Horvatic
Wed Dec 10, 2014 9:52 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Eval tuning - any open source engines with GA or PBIL?
Replies: 5
Views: 2162

Re: Eval tuning - any open source engines with GA or PBIL?

Hello Jon... first, thank you for your reply. GA tends to require large numbers of evaluations for convergence. You are absolutely right on this, genetics is damn slow... But there is a trade-off, GA offer some things that other approaches don't... There is tuning software for Stockfish that uses SP...
by Hrvoje Horvatic
Thu Dec 04, 2014 11:30 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Eval tuning - any open source engines with GA or PBIL?
Replies: 5
Views: 2162

Eval tuning - any open source engines with GA or PBIL?

It seems eval tuning has become a hot topic lately, and I would like to dip my toe into the sea too... but I'm too lazy to start from scratch... Are there any open-source engines that implement GA or PBIL, that could be used as an inspiration? It seems to me that there are several engines that DO us...
by Hrvoje Horvatic
Thu Nov 13, 2014 3:26 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: A new algorithm accounting for the uncertainty in eval funcs
Replies: 24
Views: 3458

Re: A new algorithm accounting for the uncertainty in eval f

Hello Tom, I've been trying to beat alpha-beta/PVS for ages, so I'm simpathetic with your attempt... but as I see it, it will fail for the same reason as the approach of Baum & Smith... because chess is BOTH strategic AND tactical game... the multiplication propagation/backup rule (similar to probab...