Author: Robert Hyatt
Date: 20:00:05 08/23/00
Go up one level in this thread
On August 23, 2000 at 22:10:40, Joshua Lee wrote: >I was wondering what Ply equivalent for Comercial programs to equal Deep >Thought's at 11 and 16? >In Monty Newborn's book Kasparov versus Deep Blue it says on page 156 that >Deep Thought 0.02 searched at 1,440,000Nodes per second to a Depth of 10 in >typical middlegame positions(whatever those are smirk) and that many lines were >searched to a depth of 15. > >While not the same as Deep Thought of 1989, I have seen it as searching 11 and >12 Ply against Kasparov. At a rate of 2,160,000Nodes per second it says that DT >looked between 200 and 500Million positions per move, which is impossible >considering it was Game in 90 and for Game 1 and according to the book after the >game DT had 20minutes remaining on it's clock. The game lasted 52moves which >give or take puts it at 80 seconds spent per move. As i am writing this i am >realizing that it was most likely using Kasparov's Time as well so to factor >that in...he used 80 minutes or 92 seconds for each of his moves. Tops >172seconds were spent per move for DT at 2.16Mnps 371,520,000Nodes per move. >I guess then the book is right but anyhow this isn't the question. > >I let Hiarcs7.32 sit for white to move move 36 to try and compare depth, you >need just under 19minutes to reach 12Ply complete for move 36 of Kasparov-Deep >Thought at 102Knps. with a 7Ghz machine you should get it in 2minutes 30sec at >816Knps. If Deep Thought was searching 2.16Mnps and 200-500M per position it >should take 33minutes on my computer to reach just over 200M and 82minutes to >500M.13/31 Ply and 219Million nodes later and still judged as Bh6 instead of Qd1 >and = at 0.00 which is not the case. Or is an 15 Ply Search by Hiarcs the >equivalent of a 11 Ply search by DT? Also if DT in 1988 looked at 10 but >usually 15, DT in 1989 at 11 or 16Ply really is a 15 and 20Ply search by Hiarcs >is needed??? How about for Fritz, Junior, Nimzo, Crafty or LG2000v29a?? I don't think there is any easy way to compare them. Mostly you will get only opinion, which is probably next to useless. IMHO, I would certainly trust a 12 ply search by DT over a 12 ply search by _any_ other program. I saw this play out too many times. But that is just an opinion. Trying to compare A to B is very difficult. About like comparing your favorite TV to your favorite stereo system. Which is best? Depends on what you want to do.
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