Author: Dusan Dobes
Date: 03:02:13 04/20/00
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Your results are influenced by timecontrol limits. Crafty's and Scrappy's formulas don't allow full timecontrol range for blitz: (blitz & time<=5 & inc<4) That is almost not important against other comps (just a bit against the automated ones), but it's inflating the rating against humans. IMO Crafty is not stronger against humans than against comps. Dusan Dobes On April 19, 2000 at 23:53:31, Robert Hyatt wrote: >As I had mentioned a while back, I have a sack full of quad xeon 550 machines >in a beowulf cluster. While waiting on a few final pieces to arrive, I decided >to do what I thought was an interesting test: > >two identical machines, and I mean _identical_. Quad xeon 550's, 27 gigs of >SCSI disks in a raid-0 (striping) configuration, 512mb of ram, etc. IE >everything is identical, with all the 3-4-5 piece compressed tablebases, >same opening books, etc. > >The only difference was that 'crafty' plays computers and humans, while scrappy >only plays humans. Several of us had postulated over the years that if you only >play humans, you can drive your rating through the roof. Using the same >formulas (5 3 blitz or faster, 60 60 standard or faster, or most any bullet) >I have been watching the two programs for a month now. And they seem to >hover at the point scrappy == crafty+100, roughly. Standard has crafty >actually higher, but that is because crafty is playing standard against >computers, while scrappy is playing very little standard as humans seem to be >avoiding that for the most part... and those that do play standard play crafty >as it is better known. > >100 points was a surprise... as I thought it would be more. At present crafty >is at 31126 and scrappy is at 3219 blitz (which is the most stable ratings since >most games are blitz). > >It seems that not playing computers is _not_ a way to grossly inflate your >rating, unless you consider 100 as inflated. Note that a rating of 3200 is >very high, considering that there are not a lot of GM players that are rated >even 3000. I watched scrappy play a 16 game match earlier this week, it won >8 games, lost one, then one 7 more, for a 15-1 result (5 3 blitz). It lost 32 >rating points for the effort. :) > >I am going to continue the experiment until I get the rest of the beowulf >hardware (another quad box and a fast ethernet switch to complement the >giganet switch). If you watch the ratings, you will get a feel for the >difference in playing only humans and humans + computers...
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