Author: James Robertson
Date: 13:44:20 04/01/99
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On April 01, 1999 at 15:14:05, Ian Osgood wrote: >On April 01, 1999 at 12:25:15, Stuart Cracraft wrote: > >> >>Maybe it's just my imagination but having been >>working on a program that tests on FICS, I've had >>a devil of a time getting the rating up signficantly >>over 2000 on the FICS server. Usually it will get >>up to 2010-2040 and then evoke some interesrt in >>some stronger types and get pounded down to 1970-2000 >>before it creeps up enough to get the stronger ones >>interested again (re-pounding, etc.) >> >>What's special about 2000 on FICS? Maybe just a typical >>barrier for a program? > >What is the handle of your program? > >Typically, computers modify their formula to roughly select their opposition. >Specifically, > >a) assesswin > k to avoid dropping points to low rated sandbaggers > and in general play higher rated players. >b) !computer to avoid getting crushed by 400MHz crafties >c) inc > k if your computer behaves badly at small search depths > >In addition, many computers will refuse playing more than >n games in a row with the same person to avoid repeated losses. > >When I researched formulas a while ago, I found that programs with !computer >and assesswin>0 were on average 100 points higher for the same processor speed. > >>If there is (or isn't) anything special about it, >>then I'm wondering what I could do short of >>increasing my hardware. It's an old Pentium 133mhz >>but I don't want to spend the money to upgrade it >>and would rather improve the program. > >What did you expect? For comparison, Iodine is gnuchess on a P100, >with assesswin > 1, and it maxes out at 2156. PoorGnu on a P120 with >assesswin > 0 maxed out at 2242 but is currently under 2000. Note that neither >have !computer. > >An account I run is SapphireII. It is a high quality program, but runs at only >32 MHz. It is routinely crushed by everything running on P166 or better except >for a few rank amateur programs. (This is actually pretty good! Kittinger >wrote some mean assembly.) Search depth is everything in comp-comp games. >Faster processors prevail in the long run. I keep getting killed by SapphireII! And it is not just the search depth. What depth does SapphireII usally reach in a 5 0 game? I am getting 6-7, and still die almost every time.... James > >Get an upgrade. K6's are good, cheap chess processors. (IMHO, G3's are the >best chess processors.) > >>The usual: PVS, null-move, hashing. Evaluation consists >>of about 50 terms. Evaluation is done at the leafs >>rather than pc/sq style for the most part. If you >>need further details, feel free to ask. Code available. >> >>--Stuart
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