Author: Robert Hyatt
Date: 19:12:32 05/27/01
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On May 27, 2001 at 21:42:39, James Swafford wrote: >On May 27, 2001 at 20:26:47, Bruce Moreland wrote: > >> >>Sometimes the increase is zero. For instance, in my CCT3 games over the past >>two days, none of them were affected by endgame databases. > >I used them in Tristram 5.0, which came out of retirement for CCT3. >Tablebases became a factor twice. The first time was while playing >Arasan. Towards the endgame (with seven pieces on the board), >Tristram started probing wildly. It probed the disks so much my >nps went from 300k or so to < 30k. I think it *costs* me half a >point. I can't be sure... but I went from a won position to a >drawn one. The moral of that story is to be a bit more careful about how frequently you probe. I spent a _lot_ of time until I reached something that seems to work well. > >The second case they saved my a**. This was while playing Amateur. >You yourself commented that Amateur would win that game. Will was >up on material and it really looked like he would win, but eventually >tablebases turned up a draw for me. Very lucky. > >So I guess the net effect was almost nothing. > >[snip] > >> >>I think it is interesting that so many people use the Nalimov stuff without any >>concern that at some point while the program is playing, it is not their program >>actually playing. That idea bothered me enough that I wrote my own stuff. > >It does actually, which is why I may not use them in the program I'm >working on now. I don't know yet. > > >-- >James It doesn't bother me for lots of reasons: (1) many programs running today have bits and pieces of my code in them; (2) most of the algorithsm I use today are from ideas produced by others, years ago. I don't think that just because you have something to "probe" for you, or you have a library function that does something _else_ for you, that you should be concerned about originality. IE how is it different to use EGTBs than to use a compiler somebody else wrote to compile your program? That point is totally lost on me. IE I use xboard for my GUI. I didn't write that. I use a mega-million game PGN collection. I didn't develop those. I use the same Zobrist hashing everybody else does. I didn't develop that. The list goes on and on and on...
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