Author: Dave Gomboc
Date: 21:43:02 04/12/00
Go up one level in this thread
On April 12, 2000 at 23:18:38, Robert Hyatt wrote: >On April 12, 2000 at 22:27:22, Dave Gomboc wrote: > >>On April 11, 2000 at 16:44:59, Robert Hyatt wrote: >> >>>On April 11, 2000 at 12:18:46, Jason Williamson wrote: >>> >>>>On April 11, 2000 at 09:31:51, Robert Hyatt wrote: >>>> >>>>>On April 11, 2000 at 03:07:48, Jouni Uski wrote: >>>>> >>>>>>On April 10, 2000 at 17:22:09, Arndra L. Sharp wrote: >>>>>> >>>>>>>On April 10, 2000 at 15:52:18, Robert Hyatt wrote: >>>>>>> >>>>>>>>On April 10, 2000 at 11:20:51, Arndra L. Sharp wrote: >>>>>>>> >>>>>>>>>First of all let me state that I am not a programmer, just someone who enjoys >>>>>>>>>computer chess immensely. I have seen a lot of posts that put down the Endgame >>>>>>>>>Turbo disks because they do not contain all of the TBs, in particular those TBs >>>>>>>>>after the pawn queens. I think it a good idea to reduce the hard drive space >>>>>>>>>required for TBs by pruning those TBs that any good chess program can figure out >>>>>>>>>if its brain was not disabled. It seems the real problem is that those programs >>>>>>>>>that use TBs turn off the permanent brain once the program is in a TB position >>>>>>>>>and then the program gets confused if after a pawn queens and the now simple win >>>>>>>>>(for good chess programs) is not in the TB folder. This is something that the >>>>>>>>>programmers probably did not anticipate originally everyone has seen games where >>>>>>>>>this impacts the result. Now that this has been identified, why can't the >>>>>>>>>programmers tell their programs to follow the TB tree to pawn promotion and >>>>>>>>>reset the permanent brain at that point. Many people have reported that the >>>>>>>>>programs that blunder with missing 5 man TBs play the same ending fine with 3 >>>>>>>>>and 4 man TBs. It just seems that the programs don't know how to think again >>>>>>>>>after they start down a tree and the tree ends before checkmate. A bug fix by >>>>>>>>>the programmers would be more preferable than taking up another 5 gigs of hard >>>>>>>>>drive space. >>>>>>>>> >>>>>>>>>Arndra >>>>>>>> >>>>>>>> >>>>>>>>Crafty does this correctly. But with the price of disk drives, holding all the >>>>>>>>3-4-5 piece files is now trivial... 40 gigs for 250 bucks is typical now. You >>>>>>>>only need 8 gigs for _all_ the 3-4-5 piece files (compressed). >>>>>>> >>>>>>>Does anyone sell all the TBs on CDs? >>>>>> >>>>>>Try http://mitglied.tripod.de/ChessBits/index.html! They sell 10 CDs or one >>>>>>harddisk for 3-5 piece. >>>>>> >>>>>>Jouni >>>>> >>>>> >>>>>Unfortunately it isn't all the 3-4-5 piece files. They add up to almost 8 >>>>>gigs compressed, which won't come close to fitting on 10 CDs... >>>> >>>>All the TB - the 6 piece ones from your site come to 7.05 gigs (7,580,368,539 >>>>bytes). This is all the 5 piece ones correct? Or perhaps I missed a few... >>> >>> >>>the 7.5 gigs is right... >>> >>>which won't fit on 10 cd rom disks... >> >>But it will fit on 3 or 4 DVD disks. Maybe Chessbase will use DVD if they print >>another run of these in the future. All of the 3-4-5 piece databases would fit >>on a single DVD. >> >>Dave > > >I don't follow. I wasn't aware that a single DVD could hold almost 8 gigs, >which is the total size of the 3-4-5 piece files (compressed). My mistake. I thought the 7.5 gigs included the six-piecers that had been constructed. I obviously didn't read all of the quoted text carefully! :( DVDs hold 2.something gigs each, I think. So I guess it would take 3 or 4 DVD disks just for the 3-4-5-piece databases. That seems reasonably doable. Dave
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