Author: Uri Blass
Date: 13:06:40 09/10/01
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On September 10, 2001 at 15:44:05, Robert Hyatt wrote: >On September 10, 2001 at 15:08:38, Uri Blass wrote: > >> >>the game was Deep thought's game and not Deeper blue's game so it was not >>200Xfaster than yours > >At that event, we were probably running on a Cray XMP I would guess. I will >try to look at my old tournament booklets to see exactly what we used. If >it was an XMP, which is likely, then we were doing maybe 80K nodes per >second if we were lucky. I thought that Cray blitz could search 7M nodes per second. If it is not the case then I do not understand the reason that you believe that cray blitz (7M nodes per second) was weaker than Deep thought. Was there a single game between the Cray with no bug and 7M nodes per second and Deep thought? <snipped> >So what? I would _much_ prefer to have hardware designed specifically to >tackle the chess problem, as opposed to a general-purpose computer. There >is really no comparison between the two... They did not have the hardware. The hardware was ready only short time before the match so they could not do tests to optimize their code. I also understod that the code could not work on slow hardware because the slow hardware was not designed for it so they even could not test it on slow hardware. >> >>Using available hardware that is 200 times faster and developing hardware are >>different things. > >That doesn't compute to someone that has designed hardware. Hsu spent a lot >of time developing the hardware. The _rest_ of the team spent a lot of time >developing the code. When you cannot test the code on the hardware because the hardware is not available you have problems that you do not have when the hardware is available so saying that they were 100 rimes faster is unfair. You also had problems with Cray blitz because of the fact that you could not have enough time to test it and it lost games because of bugs. Uri
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