Author: Uri Blass
Date: 11:19:26 01/29/02
Go up one level in this thread
On January 29, 2002 at 14:08:45, Robert Hyatt wrote: >On January 28, 2002 at 16:57:35, Joshua Lee wrote: > >>>>Congrats on taking the initiative. >>>> >>>>Can we assume that this is a DOS program and that it is related somehow to the >>>>Russian mainframe chess program of the old days? >>> >>> >>>Even less than you can assume Crafty is related to Cray Blitz. :) >> >>This is basically the version that was rewritten into "Turbo-C" and from the >>documentation has refinements from the version that played in the 2nd Computer >>Olympiad in London 1990. It is about as close as we can get to the actual >>mainframe version from the 70's. So like Crafty is related to Cray Blitz , so is >>this PC version of Kaissa. I would like to mention something fairly obvious but >>yet interesting that is where Kaissa in 1972 played Komsomolskia Pravda Readers >>it took 90 minutes in one instance to search 1,500,000 this PC version on a >>1Ghz it searched 2,673,745 in 56 seconds. Huge increase from 200-300 Positions >>per second i'd say. The readers played Spassky in 1971 in two games and drew one >>and lost the other. Spassky at that time was 2690 which would put the readers >>average at 2490. Kaissa managed the same result against the readers losing one >>game and drawing the other which would put it's average at 2290. > >The problem is that the way they searched in 1974 has _nothing_ to do with the >way they searched in 1990. Ditto for Blitz in 1977 WCCC, vs Cray Blitz in >the 1983 WCCC event. There is simply nothing comparable between those two >programs, even though I wrote _both_. Faster hardware completely changed the >way the search was used... And it changed what could be evaluated as well... You tried to write a strong program when you wrote Cray blitz. I believe that they did not try to write a strong program after 1974 so you cannot know that they searched in a different way. Uri
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.