Author: Bob Spent
Date: 18:28:28 02/03/99
Go up one level in this thread
On February 03, 1999 at 12:02:47, Harald Faber wrote: >On February 03, 1999 at 11:15:32, blass uri wrote: > >>>>Does anybody know how the ratings given by Chess Master 6000 compare with >>>>ELO or USCF ratings. Has anybody done any study in this subject, please help >>> >>>No such rating yet, at the moment SSDF tests CM6k. I bet it is in the Top-5 with >>>16MB hash and Sel.10. >> >>I know that it is tested with Sel 6 because this was the programmer's choice >>Uri > >I know, I asked him about the best settings. As he doesn't know he proposed the >default... Got to www.chessmaster.com they info on how processor speed affects the ratings and everything. The Benchmark is the chessmaster personality on a P90. The ratings are mathematically correct. They also explain the error factor -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Q. How are the ratings for the computer personalities calculated? A. The rating for the Chessmaster personality is based on the Swedish Rating List (SSDF) for CM5000 on a P90. The SSDF rating was converted from the Swedish scale to the U.S. scale and an adjustment was made for the CM6000 improvements. A series of computer vs. computer tournaments were played among the 96 computer personalities. The results of 4,475 games were fed into a ratings calculator. Each of the personalities has a base rating as measured on a P90. When you run CM6000 on your system, the program performs a CPU benchmark measurement and adjusts the ratings accordingly. That formula is [Base Rating] + 70 * ln([Your CPU Speed] / [Base CPU Speed]) / ln(2). Each doubling of CPU speed results in a rating increase of 70 points. -------------------------------------------------------------------------------- Q. How accurate are the ratings for the personalities? A. The ratings are mathematically precise, but they are based computer vs. computer games. Many of the Chessmaster personalities have quirks in their playing styles that a human will be able to exploit. Learning about and taking advantage of these weaknesses is part of the fun of Chessmaster, but you might find yourself able to defeat certain personalities that you don't think you should be able to based on their ratings. -------------------------------------------------------------------------------- Q. Can I create a new personality and play a rated game against it? A. No, you can create a new personality, but it has no rating and cannot be challenged to a rated game. Q. How does my rating change after playing a rated game? A. There are two classes of rated players: provisional and non-provisional. You are a provisional player for your first 20 rated games, after which you are a non-provisional player. During your provisional period, the USCF provisional formula is used. It is assumed that if you consistently defeat another player, you are rated 400 points above that player. If you consistently lose to another player, you are 400 points below that player. You get a score for each game played: the opponent rating plus 400 if you win, the opponent rating minus 400 if you lose, and the opponent rating exactly if you draw. Your rating is the average of these scores. During your non-provisional period, the USCF non-provisional formula is used. For each win, you will gain between 0 and 32 points depending on your opponent's rating. If you are evenly matched, you will gain 16 points. If the opponent is much stronger than you (say 400 points above, you will gain close to 32 points). You will gain almost no points for beating someone much weaker than you --------------------------------------------------------------------------------
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