Author: Ralph Patriquin
Date: 18:15:08 02/06/03
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On February 06, 2003 at 15:25:09, John Merlino wrote: >On February 06, 2003 at 14:23:24, Ralph Patriquin wrote: > >>On February 06, 2003 at 07:52:34, Harpo wrote: >> >>>After a 15 year hiatus, I'm planning to return to tournament play. In >>>preparation, I've been playing 30/75 SD60 games against a handful of CM9K's >>>personalities. I recall reading somewhere that these were guaged with USCF-rated >>>players, but I would appreciate any opinions from OTB players as to how accurate >>>these ratings "feel." I'm only curious about the personalities rated from >>>2100-2500. >>> >>>Thanks in advance. >> >>Harpo, >> >>As John Merlino mentioned, some of the personalities exhibit rather bizarre >>playing styles that cause them to make moves that in my opinion even a >>relatively weak human player would not . I think you might find it will hurt >>your play by training with them. >> >>I prefer to use the Chessmaster and other Grandmaster personalities but simply >>weaken them by adjusting their Strength of Play setting. You might want to start >>out at 50% and adjust from there in 10% increments up or down until you get a >>challenging game. >> >>In this way you get a more balanced game with different playing styles, but >>without the crazy play exhibited by some of the other personalities. You will >>also play against better and varied opening books. The only downside is you >>won't know the true rating of these opponents. Maybe John can explain how >>Strength of Play works and a possible rating estimate from it, as I have no idea >>as to its internal workings. >> >>Ralph > >Simply adjusting the Strength of Play setting is a good idea, but this setting >is not exactly intuitive. The way Johan set it up this variable, it uses an >inverse cubic function. So, going from 100 to 90 (or even 85) will result in >VERY little reduction of strength. Once you get below 80, the strength starts to >fall off more dramatically. So, looking at other personalities will help in this >regard as well. > >jm Inverse cubic, wow! Well I guess he had his reasons. Although it would have been nice if it was linear, so that simple assumptions could be made, like: "If Chessmaster is 2600 at 100%, then it's approximately 1300 at 50%." John do you know anything about how the play is actually weakened? Does it use second best move, third best move etc. (probably a little too simplistic) or something else? Ralph
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