Author: Robert Hyatt
Date: 11:44:37 08/21/02
Go up one level in this thread
On August 21, 2002 at 14:20:45, Vincent Diepeveen wrote: >On August 21, 2002 at 11:11:33, Robert Hyatt wrote: > >i just emaile dyou the thing for the second time bob. >you didn't even look at the writings of Hsu. I have reviewed _most_ of the things he wrote, for him. I have a copy of the paper already. > >Please look at page 5 very carefully 12.2 ply it says. Yes. And take the logs and add up the _first_ number from each iteration and divide by N. Guess what you get? 12.2... Which was the software part of their search. The hardware did things differently, as they have reported. > >>On August 21, 2002 at 10:20:57, Vincent Diepeveen wrote: >> >>>On August 21, 2002 at 09:00:19, Terry McCracken wrote: >>> >>>please read the thing i emailed you to nomad@easyfocus.com >>> >>>what is worth more. >>>the statement of a guy with a bad memory called hyatt who >>>doesn't even know when he stripped razoring out of his OWN >>>software, or the statement of the programmer of the thing >>>called deep blue II ? >> >>OK... I'm more than willing to play that game. If my memory is >>so bad, please refrain from asking me for _any_ help in the future. >> >>I don't have to remember when I removed razoring. Because I wrote it >>down in my source code. :) >> >>In any case, I now look forward to more peace and quiet without your >>constantly asking me how to fix this or that, since my memory is so >>terribly bad... >> >> >> >> >> >>> >>>Best regards, >>>Vincent >>> >>>>On August 21, 2002 at 08:22:06, Vincent Diepeveen wrote: >>>> >>>>>On August 21, 2002 at 08:13:47, emerson tan wrote: >>>>> >>>>>>wHATA IS DEEP BLUES AVERAGE PLY LEVEL ON TOURNAMENT TIME CONTROL, I UNDERSTAND >>>>>>THAT IT CALCULATES 200 MILLION POSITIONS PER SECOND BUT NEVER HEARD OF ITS >>>>>>AVERAGE PLY. THANKS >>>>> >>>>>they estimate it at 126 million nodes a seconda gainst deep blue. >>>>> >>>>>It had a nominal search depth (depth limit) of 12 ply. With a lot of >>>>>tactical extensions a lot of lines were searched at 17 ply though. >>>>> >>>>>that's however true for all chess programs. I averaged in DIEP way >>>>>deeper. It depends basically whether you count hashtable cutoffs with >>>>>the depth or not. I tend to not count them. In hardware there was not >>>>>a hashtable. >>>>> >>>>>Average search depth says nothing. The nominal search depth is more important. >>>>>This was 12 ply. So the weakest link were lines of 12 ply simply. >>>>> >>>>>Best regards, >>>>>Vincent >>>> >>>> >>>>Deep Blue II did searches with extensions of 17 ply + at 3 min. per move and >>>>wasn't uncommon to actually hit 22 plys. >>>> >>>>Dr. Robert Hyatt watched this with his own eyes, so I'm sure he'll have >>>>something relevant to say on this matter. >>>> >>>>Also Deep Blue II at times searched 1,000,000,000 plys a sec. and wasn't all >>>>that uncommon to do so! >>>> >>>>Terry
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