Author: Robert Hyatt
Date: 15:19:30 07/19/99
Go up one level in this thread
On July 19, 1999 at 07:30:56, blass uri wrote: > >On July 19, 1999 at 03:38:30, Dave Gomboc wrote: > >>I just had hopped over to Ed's website (www.rebel.com) because I haven't been >>there in a while. He has a new thing in the top-right corner with many >>positions, and how Rebel's play is affected when tweaking a parameter (chess >>knowledge, pawn structure, king safety, "attractiveness" (I think he means king >>tropism), level of search extensions, et cetera. Somewhere else at the site, it >>indicates that in the future there will be a contest to see who can come up with >>the best settings for Rebel, including cash prizes! There will also be defaults >>adjusted settings for various GMs, similar to Chessmaster. Cool! >> >>What I am wondering right now is... how the heck is Ed is going to be able to >>decide which set of adjusted settings are the best? :-) > >He is not going to know it. > >programs use many numbers in the evaluation function and it is practically >impossible to know the right numbers(for example we cannot know which value out >of many numbers like 3,3.01,3.02 or 2.99 is the best value for a knight). > >remember that the problem is not to get the right value of one number but to get >the right value of hundreds or thousands numbers. > >Uri He can easily do what I have been adding to crafty over the past few months. Rather than giving users control over _every_ tiny evaluation term, I give them a 'scale' they can slide to increase/decrease specific terms. IE so far, in crafty, you can control pawn structure, passed pawn scoring, king safety, king safety assymetry, king tropism, to name a few. You have a 'scale' factor for each term, such that scale 90 (this in in percent) will reduce that one scoring component to 90% of its original value. Or you can do scale 150 to make that particular component more important. This is actually nicely tunable without having to know how the engine does things inside...
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.