Author: Dann Corbit
Date: 12:55:12 07/17/02
Go up one level in this thread
On July 17, 2002 at 15:25:34, Sune Fischer wrote: >On July 17, 2002 at 14:32:11, Dann Corbit wrote: > >>On July 17, 2002 at 14:13:57, Sune Fischer wrote: >>[snip] >>>I would love to see a G/5 rating list compared to a G/120 list, I think most >>>good engines does about equally well in all time controls. >> >>This is a common contention. I have heard it said by such experts as Christophe >>Theron and Gian-Carlo Pascutto. However, it is clearly and transparently wrong. >> >>Assertion: >>No two chess programs with non-identical search and evaluation have *exactly* >>the same branching factor. >> >>If this assertion is true, then it is transparently false that chess programs >>play with the same level of excellence at all time controls. >> >>Or, stated another way, for every chess program, at *some* point, the branching >>factor of that program will totally dominate the play of the program. >> >>Draw a curve of: >> >>C0 * exp( C1 * x) >>verses >>C2 * exp( C3 * x) >> >>and as long as constants C1 and c3 are not identical, at some point the equation >>with the smaller constant in the exponent will dominate. If (by chance) C0 or >>C2 is also smaller for the smaller exponent modification, it is possible that >>one program will always be better everywhere [within reason]. >> >>However, the assertion that the entire family of curves never have intersections >>is [with no doubt whatsoever] utterly false. > >Yes I know the math (I've posted it myself:). > >The point is, can you give examples where program X is better at blitz and >program Y better at standard time (on ~1GHz)? >I rarely see these lines cross, and if they do it is probably only between very >equal opponents or weak engines that have bad tuning. >IIRC people on this board have refuted the notion, that Hiarcs should be a bad >blitzer just because it is a slow searcher, for instance. > >I prefer to play around 50-100 games to see if the changes were for the better >or worse, this would take weeks if I had to play at standard time. >I doubt there is any significant difference (other than a lot of wasted time). The superfast games I posted (games in 15-60 seconds) are obviously pure crap. At some point, that will stop being true. Exactly where is the transition? I think the linear scaling of chess engines is not something you can rely on.
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.