Author: Vincent Diepeveen
Date: 11:22:40 08/21/02
Go up one level in this thread
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. > > >> >>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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