Author: Albert Silver
Date: 04:21:06 12/11/99
Go up one level in this thread
On December 10, 1999 at 23:35:53, Chuck wrote:
>In answer to your question, Enrique, of how many games the Mach IV had played on
>the 1993 list I quoted, I do not know, that stat wasn't on the list I dug up.
>But I had had one for at least two years by that time and I know it was on the
>list the whole time I had it. If you might remember, it received a USCF rating
>of 2325 way back then (circa 1991).
>
>Chuck
I'd advise you to be very careful about the USCF ratings. They were all based on
30 minute games against human opposition and not slower time controls. A very
significant difference.
Albert Silver
>
>
>On December 10, 1999 at 23:23:44, Enrique Irazoqui wrote:
>
>>On December 10, 1999 at 22:53:41, Len Eisner wrote:
>>
>>>On December 10, 1999 at 22:26:43, Chuck wrote:
>>>
>>>>On December 10, 1999 at 20:16:13, Bertil Eklund wrote:
>>>>
>>>>>On December 10, 1999 at 20:01:28, Chuck wrote:
>>>>>
>>>>[snip]
>>>>
>>>>>>
>>>>>>I think it is very easy to prove that Robert is right here. It is very
>>>>>>noticeable. I once played out a 40/2 match between a Mach IV and a Mephisto
>>>>>>Polgar, the Mach IV one 10-2. The two machines are very close in strength,
>>>>>>probably within 100-150 points. But playing many games and watching these two
>>>>>>computers evaluate positions, it was evident that the speed of the Mach IV
>>>>>>(compared to the Polgars 5 Mhz) gave it a big tactical advantage. Head-to-head
>>>>>>this seems to be magnified. I played an old MChess against the Mach IV and it
>>>>>>won 11-1. Wow, what results. The point is, when a progam plays another which is
>>>>>>on significantly slower hardware, the faster program is going to win big and
>>>>>>it's rating will be inflated. Two years later, when it becomes the one with slow
>>>>>>hardware, it will be the one getting pounded, and it's rating will go down. I
>>>>>>think at one time the Mach IV was on the SSDF list at around 2200, but late in
>>>>>>it's life it dropped to below 2100.
>>>>>>
>>>>>>Chuck
>>>>>
>>>>>Hi!
>>>>>
>>>>>As checked houndreds of times this is completely wrong.
>>>>>
>>>>>Play two-houndred games and the level should probably be accurate.
>>>>>
>>>>>Bertil SSDF
>>>>
>>>>Then explain to me how the Mach IV had a SSDF rating of 2282 in January 1993 but
>>>>now has a SSDF rating of 2074!?!
>>
>>How many games did it play by 1/93 before getting the 2282 rating?
>>
>>Enrique
>>
>>>>Chuck
>>>
>>>Yes, that is the question, and it applies to the other old programs too. If
>>>computers are anything, they are consistant, so the Mach IV would play exactly
>>>the same today as it did in 1993, yet its rating is over 200 points lower.
>>>
>>>Len
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.