Author: Robert Hyatt
Date: 11:42:49 08/21/02
Go up one level in this thread
On August 21, 2002 at 14:22:40, Vincent Diepeveen wrote: >On August 21, 2002 at 11:10:08, Robert Hyatt wrote: > >>On August 21, 2002 at 09:00:19, Terry McCracken wrote: >> >>>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. >> >>No I won't. :) This is a hopeless argument. Vincent calls the entire group >>"liars" when they say 12(6) means 12 plies in software plus another 6 in >>hardware. Since the machine is not operational, all we can do is either believe >>the principals or not... I believe them myself, but others can believe whatever >>they want... it won't make one scintilla of difference to the deep blue story >>of course. > >you are the only one Bob, because you still didn't take the effort to >read what Hsu wrote. I _posted_ what he and two other members of the team wrote. You simply have problems with comprehension and try to bend things into your own reality/interpretation... > >> >> >>> >>>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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