Author: Dave Gomboc
Date: 08:10:42 10/22/99
Go up one level in this thread
On October 22, 1999 at 08:30:43, Jeremiah Penery wrote: >On October 21, 1999 at 17:06:18, Dave Gomboc wrote: > >>On October 21, 1999 at 16:05:36, Jeremiah Penery wrote: >> >>>On October 21, 1999 at 14:23:59, Dave Gomboc wrote: >>> >>>>IIRC, Amir once said that Junior extends even more aggressively than DB. >>>>Unfortunately, he didn't get any quantitative evidence or examples. >>> >>>I think that common sense can show that this can't be true. >>> >>>At 200M NPS, why was DB getting 'only' 12-14 ply in 3 minutes/move? The reason >>>is that all the rest of it was extensions. >>> >>>At 200k NPS (or whatever it is Junior gets - Even at 400k, it is still 500x >>>slower than DB), how many ply can it get in 3 minutes/move? 10 ply? 11? (I >>>really don't know, so someone please enlighten me. :) >>> >>>So, even though Junior is at least 500x slower than DB, it can reach comparable >>>depths _AND_ extend more? I don't think so. >> >>I don't think that's the claim. Rather, the claim is that for a given level of >>brute-force search, Junior will generally extend selected lines of play even >>further than DB. I think it's clear that Junior's not going to search as many >>plies full-width, nor do I think Amir ever suggested that. > >But Junior _does_ search as many plies full-width. DB really did do only 12-14 >ply full-width. I know Fritz often does deeper than this in 3 min/move, Crafty >can often reach these depths, (I don't really know much about depths of other >programs, but I suspect most can reach at least near to this depth in 3 >min/move). This is the dilemma - Where is all the rest of DB's speed going? It reports something that can be roughly interpreted as half-plies... yes? You say it is reaching "28" on the "brute" side? Dave
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