Author: Chris Carson
Date: 06:45:15 03/25/03
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On March 25, 2003 at 09:24:56, Robert Hyatt wrote: > >>On March 25, 2003 at 00:45:03, Uri Blass wrote: >> >>From the book "how computer play chess" page 192 >> >>Table10.1 Correlation between search depth and chess rating. >> >>Depth of search 8 year 1980 program Belle Rating 2200 >>Depth of search 9 year 1986 program Hitech Rating 2400 >>Depth of search 10 year 1989 program Deep Thought 2600 >> > > >That's a pretty sensless comparison. IE would you compare 9 plies from >"the king" to 10 plies from "fritz"? I wouldn't. And the comparison is >nonsense. Hitech was no faster than Belle. It searched about the same >speed. Deep Thought was the first (of the three above) that was a quantum >jump in speed. And with a different search. Also the years (above) are >wrong. Belle hit 2200 in 1983. Ken was given the "life master" certificate >from the USCF at the 1983 WCCC event in New York. Hitech didn't hit 2400 >in 1986 either. And it was a couple of years before Deep Thought hit 2650+ >as well. > In my opinion, speed and depth are only meaningful when comparing one program against itself on different boxes (slower vs faster hw) to get an aproximation of ELO increase for the program on different boxes (but NPS or Depth between programs is not meaningful). Comparing speed and depth between programs is useless, whether for comercials or CT/DT/DB. Comparing results (comp vs comp, Human vs comp) is meaningful. Actual ELO and Ranking of GM's that played (ie, ELO of opponents) is the only method to compare strength of programs (over the board play). Also conditions of the match/tournament are important. GM's that have months to prepare for a program (comercial programs) will score better than GM's that can not play the machine (CT/DT/DB). Uri does very good analysis for the qulity of play (also important, shows program strength and weakness).
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