Author: Robert Hyatt
Date: 07:50:06 10/17/02
Go up one level in this thread
On October 17, 2002 at 03:09:17, Uri Blass wrote: >On October 16, 2002 at 23:35:10, Robert Hyatt wrote: > >>On October 15, 2002 at 14:01:35, Johan Melin wrote: >> >>>On October 14, 2002 at 07:34:16, Bas Hamstra wrote: >>> >>>>Bob, did you read the Hsu transcript posted here? It is pretty clear to me that >>>>Hsu himself says 12 ply fullwidth *total*. Case closed. Please read the complete >>>>transcript. >>>> >>>>Best regards, >>>>Bas. >>> >>>I agree. The transcript with Hsu is clear. But it would be out of character for >>>CCC if everybody just agreed with each other, there still has to be a fight ... >>>;) >>> >>>/Johan Melin >> >> >>Here is the relevant part of the transcript: >> >>----------------------------------------------------------------------------------------------------------------------- >>CrazyBird(DM) kibitzes: 12(6) means 12 plies of brute force (not >>counting the search extensions & quiescence). >>CrazyBird(DM) kibitzes: 6 means the maximum hardware search depth >>allowed. >>CrazyBird(DM) kibitzes: this means that the PV could be up to 6 plies >>deeper before quiescence. >>----------------------------------------------------------------------------------------------------------------------- >> >>OK, some questions: >> >>1. If 12(6) means 12 plies total, with 6 done in hardware, how do you reconcile >>that >>_last_ sentence above (the PV could be up to 6 plies _deeper_ before >>quiescence). >>Deeper than what? Only possible answer is deeper than 12 plies. > >No > >I think that he meant deeper than the pv that was in the logfile. Why would he word it like that? "up to 6 more plies"? When the hardware does all their normal extensions, such as SE, recap, check, and so forth. IE he would have said "at least 6 more plies" since the hardware was searching 6 plies + extensions... He didn't say that however, so that the "up to 6" _must_ mean something else... > >> >>2. If 12(6) means 12 plies total, with 6 in hardware, what does 4(5) mean? 4 >>plies total >>with 5 done in hardware? Which means the SP hardware does _no_ searching and >>that >>_everything_ (and then some it seems) is done by the hardware chess chips? > > >No > >It is possible that the original depth is 4 but the hardware got 5 plies because >of 2 ply extension. > Not possible. Suppose the position has _no_ extensions. What now? >They did not do more than 2 ply extension for 2 plies but I think that there was >no rule that they did not do 2 ply extension for 1 ply. > >> >>Neither of those matches what he says above. >> >>I read his explanation of 12(6) as "12 plies of brute force, up to 6 more plies >>of hardware >>search [which is not brute-force as he has explained elsewhere, because of the >>forward pruning >>they were doing]". > >I never read him say up to to 6 *more* plies of hardware If you read what I wrote immediately above, that was my _interpretation_ of what he said. That's why I put it in quotes after the "I read his ... > >Uri
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