Author: Jeremiah Penery
Date: 13:05:36 10/21/99
Go up one level in this thread
On October 21, 1999 at 14:23:59, Dave Gomboc wrote: >On October 21, 1999 at 09:19:11, Jeremiah Penery wrote: > >>DB has a lot more knowledge than Hiarcs does. Also, DB was searching a lot more >>than the 14-ply that Joshua was saying - it searched 14 + 30(+) ply in most >>interesting lines. It's really difficult to determine an accurate 'depth' most >>of the time, because for each program it will be different, based on the number >>of extensions done. Hiarcs probably extends more than most other micro >>programs, but DB does a lot more even. > >IIRC, Amir once said that Junior extends even more aggressively than DB. >Unfortunately, he didn't get any quantitative evidence or examples. I think that common sense can show that this can't be true. At 200M NPS, why was DB getting 'only' 12-14 ply in 3 minutes/move? The reason is that all the rest of it was extensions. At 200k NPS (or whatever it is Junior gets - Even at 400k, it is still 500x slower than DB), how many ply can it get in 3 minutes/move? 10 ply? 11? (I really don't know, so someone please enlighten me. :) So, even though Junior is at least 500x slower than DB, it can reach comparable depths _AND_ extend more? I don't think so. >It's also difficult to know how much knowledge Hiarcs has, unless you happen to >be its author. True. However, it can be said that it most likely has more knowledge than other micro programs (except CS-Tal). The more knowledge a program has, the slower its evaluation, and so the slower the NPS, becauase it will take more CPU cycles to complete. Hiarcs is much slower in terms of NPS than most, and therefore there is more knowledge. Whether this knowledge is entirely useful always is certainly debatable. > Sometimes I feel like I know more about DB than I do about the >commercials. Rebel excepted, of course, thanks to Ed's participation here... >which is much appreciated. I am very glad that Ed participates so much here. I believe he does as much as anyone to further progress in computer-chess (Rebel vs. GM, his experiments, such as Chess in 2010, PB-on vs. PB-off, etc.), and hope he continues to do so. Because of Ed's rather outgoing attitude about his program, I will buy Rebel before I buy any other commercial program. :) Jeremiah
This page took 0.01 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.