Author: Peter Fendrich
Date: 16:04:15 06/02/04
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On June 02, 2004 at 17:16:15, Dan Wulff wrote: >Hi! > >I've been thinking about using performance rating to select moves for Gandalf's >opening book, but I cannot seem to find the correct way to calculate the >performance rating od a given move. > >Say a 2600 player wins a game against an 2500 opponent, starting with 1. e4, >what would the performance rating be after that ?? > >I've been looking at the ratings in the CB GUI, but sometimees, when only one >game has been played, the Performance is over 3200, which I cannot seem to fit >into the ELO rating formula, where the highest possible gain/loss for a single >game is 16 ELO points. > >Am I going about this in a completely wrong manner, or does performance rating >have nothing whatsoever to do with ELO rating ?? > >Greetings > >Dan Wulff >(The Gandalf Team) Hi Dan, forget about performance rating (and your statement about 16 points is wrong...) You can absolutely use the rating difference as a way to set weights to opening moves. The rating difference is equal to an expected wining % and that can be translated to what one win/draw/loss is worth in ELO points in the long run. As you are Danish you will probably understand this table: http://hem.passagen.se/wirsbo/lask.html The rating diff translates to ELO points that you can add into your book. /Peter
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