Author: Sune Fischer
Date: 07:59:47 07/22/02
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>Now let's take a look at DB2. Except the 6 games from 1997 we have not a >single gamescore of the practice of the machine. The first game of the show >event reveiled that DB2 was as weak as typical machines. Some moves were >absolutely nonsense. The main line leading to its loss wasn't foreseen, which is >typical for machines. Well.... I'm sitting here reading an article: "IMB's Deep blue chess grandmaster chips" page 80 - Performance: "The earliest games, in early 1997, used a single chip running at 70% clock speed and at one-tenth to one-fifth efficiency as the result of a hardware bug. This reduced the chip to 7% to 14% of its regular speed, or about the same search speed as the fastest commercial chess programs on a pentium pro 180 MHz PC. Two of the commercial programs, running on the pentium pro pc, served as opponents in the early chip debugging sessions. Of the 10 games played, the single-chip program won all 10. This gives about 95% confidence level that a single chip, even at reduced speed, was at least 200 points stronger than the commercial chess programs in the machine-versus-machine play. We played another 30 games with either the single-chip version or Deep Blue Jr. against the commercial chess programs. Of the 40 games total, the chess chip(s) lost two points and scored 95 percent against the PC programs. ... This rating has no bearing on the real playing strength, as cursory examination showed serious positional weaknesses in the commercial progams that the chess-chip systems exploited repeatedly. ... The more interesting games pitted Deep Blue Jr. against the Grandmasters working on the project. The Grandmasters' average rating were in the high 2500s on the international scale. Deep Blue Jr. scored better than three-to-two against them, which placed it at 2700 plus, or among the top 10 players in the world." -S.
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