Author: Terry McCracken
Date: 06:00:19 08/21/02
Go up one level in this thread
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
This page took 0.03 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.