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Subject: on ceiling effects and the need for time adjustments

Author: Joseph Ciarrochi

Date: 18:36:37 01/18/06


I just ran a 4/4 match of rybka beta 1 versus ruffian 2.1 and rykba won
13.5-1.5. It would be real hard for any later rybkas or any engine for that
matter to improve on this score.

Then it occured to me: Maybe this is a core problem with our testing. Do we have
some ceiling effects going on? For example, both Grand masters and internal
masters would beat me 20 -0, and both would receive the same ELO bonus (actually
the GM would receive fewer points for beating me.). This happens despite the
fact that the GM is much better.   The same thing may happen with engine
tournements.

Should we be perhaps giving a time bonus for engines below a certain strength
(e.g. below ruffian).? If we want to maximize our sensitivity to engine
differences, perhaps we should give a sufficiently long time bonus so that
winning percentage is closer to 50% rather than 10%.

It would be interesting to see how fruit, fritz and rybka performan against
ruffian with a 50% time bonus.


what do you folks think? Would time bonuses provide more meaningful data

best
Joseph




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