Author: Eugene Nalimov
Date: 21:55:28 01/29/02
Go up one level in this thread
Kaissa was a brute force program. I have a book 'Games Programming' (in Russian) written by Kaissa authors and published in ~1977. Eugene On January 30, 2002 at 00:09:27, Robert Hyatt wrote: >On January 29, 2002 at 14:19:26, Uri Blass wrote: > >>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 > > >However I _do_ know that Kaissa 1974 was a strong program for that time >period. And there were a few "brute force" programs running at the time >and they all got smashed due to 3-4 ply searches max...
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