Author: Robert Hyatt
Date: 07:45:44 06/03/00
Go up one level in this thread
On June 02, 2000 at 23:28:52, Joshua Lee wrote: > >> >>Bxh6 has been a test suite position for many years. Here is what happened to us >>that year. Right at the last minute, our primary machine at Cray Research >>became unavailable due to a complete moving of their corporate research lab to >>a new facility. They made arrangements for us to use a pretty old cray at >>the University of Minnesota. The only problem was that the Minnesota machine >>didn't have the "interactive access facility" hardware, which meant it could >>only be used via batch processing. To get CB to make a move, I edited a batch >>file which had all of the current game's moves included. I would add the new >>move, then submit the job, which went thru a queueing front-end machine, and >>on to the cray. To be safe, I had to set the search time per move to about 1 >>minute, rather than 3, even though we were playing 40/2hr time controls. I >>could not use any pondering or anything. >> >>On that move, Qxb6, we went 1 ply too shallow to see the forced draw by Bxh6. >>Had we been "interactive" so that we would have been using normal time controls, >>we would have seen that even back then. Unfortunately, we didn't. There were >>other such things that happened to us over the years, so it was just "part of >>the normal course of unexpected events." >> >> >>PC programs were _always_ slow. Even on occasions when we were not as "smart" >>as our opponents, we could usually out-search them anyway and _still_ win. Of >>course, we worked on those "holes", but as we found out, speed covers up for a >>lot of things. > >I knew there had to be an explanation as it isn't too deep of a move like Qe3 in >the DB-Kasparov game. > >I made my way to 1985 games and i was wondering what you could tell me of the >search depths for both CB and Hitech during their matchup i am about to start >analyzing this game as i had already found a win for Bebe in it's game against >Hitech. I had heard that Hitech's nps was 200K in 1995 but what about before >then? thanks again I would guess that both programs probably were searching to about 9 plies. I am not in my office, but I will try to look thru my old paper logs to see if I can find that game (if I printed it out). I have some old CB games (IE I have the output for the 1986 wccc event in its entirety so I can give you variations and scores and times there). CB and HiTech were searching about the same depth in 1985, roughly. We were doing about 100K nodes per sec, they were doing maybe 160K.
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.