Author: Robert Hyatt
Date: 08:10:08 08/21/02
Go up one level in this thread
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. > >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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