Author: Vincent Diepeveen
Date: 12:02:47 10/13/02
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On October 13, 2002 at 14:36:07, James Swafford wrote: EeEk(* DM) kibitzes: kib question from ardee: Does "12(6)" mean 12 total ply or 12+6=18 total ply? This has the been source of huge arguments for years! CrazyBird(DM) kibitzes: 12 total in terms of brute force. 6 is just the max partition in hardware. >On October 13, 2002 at 14:14:13, Vincent Diepeveen wrote: > >>On October 13, 2002 at 13:50:24, Jeremiah Penery wrote: >> >>for any chessprogrammer it is very clear Jeremiah. >> >>It's 12 ply and the 6 only means that the hardware search can >>be up to 6 ply within that 12 ply nominal. > >No. "the PV could be up to 6 plies DEEPER." > >I take this to mean the PV is at least 12 ply brute force. There >may have been up to another six ply searched in hardware, for a >total of between 12 and 18 ply. > > >-- >James > > >> >>it's excluding extensions and qsearch moves of course that depth. >> >>Very clear to me. >> >>Also page 5 from artificial intelligence: "nominal depth 12.2 ply average" >> >>very clear to me. >> >>>On October 13, 2002 at 13:19:34, Peter Berger wrote: >>> >>>>On October 13, 2002 at 12:00:39, Andrew Williams wrote: >>>> >>>>>Several people asked: >>>>> >>>>>Question: What does "12(6)" mean in Deep Blue's logs? >>>>> >>>>>Dr Hsu said, "12(6) means 12 plies of brute force (not counting the search >>>>>extensions & quiescence). 6 means the maximum hardware search depth allowed. >>>>>this means that the PV could be up to 6 plies deeper before quiescence." >>>>> >>>>>Unfortunately questions were being fed through a third-party, so it wasn't >>>>>possible to get a follow-up. >>>>> >>>>>Andrew >>>> >>>>How about this one? >>>> >>>>EeEk(* DM) kiebitzt: kib question from ardee: Does "12(6)" mean 12 total ply or >>>>12+6=18 total ply? This has the been source of huge arguments for years! >>>>CrazyBird(DM) kiebitzt: 12 total in terms of brute force. 6 is just the max >>>>partition in hardware. >>>> >>>>This one sounds pretty clear to me. >>> >>>I still don't think that's very clear. What does he mean by 'brute force'? >>>The other answer to that question[1] implies that 12 is the software depth, and >>>the hardware could add a maximum of 6 plies, not counting quiescence. If not, >>>then it's still impossible to explain a number like 4(5), which comes up more >>>than once in the logs. >>> >>>[1] - Dr Hsu said, "12(6) means 12 plies of brute force (not counting the search >>>extensions & quiescence). 6 means the maximum hardware search depth allowed. >>>this means that the PV could be up to 6 plies deeper before quiescence."
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