Author: Tony Werten
Date: 13:01:51 03/29/01
Go up one level in this thread
On March 29, 2001 at 15:12:21, Christophe Theron wrote: >On March 29, 2001 at 14:39:34, Tony Werten wrote: > >>On March 29, 2001 at 14:21:16, Christophe Theron wrote: >> >>>On March 29, 2001 at 13:49:06, Tony Werten wrote: >>> >>>>On March 29, 2001 at 13:31:59, Christophe Theron wrote: >>>> >>>>>On March 29, 2001 at 09:14:57, Robert Hyatt wrote: >>>>> >>>>>>On March 29, 2001 at 06:22:13, Jouni Uski wrote: >>>>>> >>>>>>>On March 29, 2001 at 06:17:50, Alexander Kure wrote: >>>>>>> >>>>>>>>On March 29, 2001 at 04:37:19, Tony Werten wrote: >>>>>>>> >>>>>>>>>Hi all, >>>>>>>>> >>>>>>>>>until what depth do various programs probe the tablebases ? >>>>>>>>> >>>>>>>>>cheers, >>>>>>>>> >>>>>>>>>Tony >>>>>>>> >>>>>>>> >>>>>>>>Hi Tony, >>>>>>>> >>>>>>>>In London 2000, I let Nimzo 8 play with a depth of 6 plies, but later I came to >>>>>>>>the conclusion that 8 plies might be better overall. This is indeed the default >>>>>>>>setting of NimzoX and Varguz playing on ICC. >>>>>>>> >>>>>>>>Greetings >>>>>>>>Alex >>>>>>> >>>>>>>Sorry one stupid question: is this the first or last 6/8 plys? >>>>>>> >>>>>>>Jouni >>>>>> >>>>>> >>>>>>His statement would make no sense if it were the _last_ 6-8 plies. Those >>>>>>are the ones that kill performance if you aren't careful. The first 6-8 plies >>>>>>don't cost a thing. >>>>> >>>>> >>>>> >>>>>But it could also mean it probes TBs in all the plies except the last 6/8. >>>>> >>>>>Meaning that if Nimzo is doing a X plies search, then the program probes the TBs >>>>>in the tree for all nodes that have a distance from the root below or equal to >>>>>X-6 (or X-8). >>>> >>>>Could be but that would mean, with an average depth of 10 to 12, you'd be >>>>probing the first 4 to 6 ply. I mean, it helps but it could help more. >>>> >>>>That is, not counting extensions, but you if you search 10 ply, you don't know ( >>>>at ply 8 ) how many plies are still coming. >>>> >>>>cheers, >>>> >>>>Tony >>> >>> >>>But you know how many plies you have done since the root position... >> >>2 possibilities: >>- We are talking about different things >>- I don't get it >> >>Might be both. >> >>Tony > > >You don't know how many extensions you are going to do, so you just ignore >extensions and assume you are going to search full width the same number of >plies as your iteration number. > >So at iteration 10, stop probing TBs after two moves from the root (assuming >like Nimzo that you don't probe in the last 8 plies of search). > >That is why I say "you know how many plies you have done since the root >position...". But then you don't have almost no depths where you probe. (In your example only ply 1 and 2 ) > > > > Christophe
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