Author: Jeremiah Penery
Date: 10:10:35 10/22/99
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On October 22, 1999 at 11:10:42, Dave Gomboc wrote: >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? I don't know, for sure. Hopefully someone with Junior can enlighten me. However, I strongly suspect that it can get 24-28 in 3 min/move. ¿Maybe I'm completely wrong. Jeremiah
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