Author: Uri Blass
Date: 22:08:59 06/07/03
Go up one level in this thread
On June 07, 2003 at 23:04:47, Tony Schleizer wrote: >Christophe: > >How did you come up with those ratings for Chess Tiger for the Palm? I have >Chess Tiger 14.9 and have played the some games on the easy levels and lots of >games of speed chess and 2050 USCF seems high for trainer level 8, as does the >2300 USCF estimate for the regular version. > >Regards, > >Tony I do not have palm tiger but I can explain why 2300 USCF rating can be a good guess based on my knowledge. I see from the site that 200 elo difference between fide rating and USCF rating is claimed. I do not know if it is correct and I will assume for this discussion that 100 elo is the real difference. I also remember that palm tiger14.9 got near 2100 ssdf rating. I also know that ssdf was initially based on games of humans against computers so it is logical to believe that the weak programs in the ssdf list had ssdf rating that is close to the fide rating. I also know that the ssdf reduced the rating of chess programs by 100 elo to do the rating closer to rating against humans. It means that 2100 ssdf rating of today should be eqvivalent to 2200 Fide rating unless humans today play significantly better than they played in the time that the ssdf tested programs against humans at 120/40(10-20 years ago). It means that palm tiger14.9 is 2200 Fide rating or 2300 USCF rating. Uri
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