Author: Vincent Diepeveen
Date: 11:11:22 08/21/02
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On August 21, 2002 at 10:37:12, Terry McCracken wrote: All you need is page 5 which says they had a nominal search depth of about 12.2 ply. Best regards, Vincent > >I just recieved your e-mail Vincent, I'll read the PDF later today, thanks. > >Terry > > > > >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 ? >> >>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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