Wlodzimierz Holsztynski (wlod) wrote:

For psychological reasons the additive translation
of the multiplicative rating will be provided. It is
obtained by the formula

ar(X) := log(mR(X)) + 1000 - log(1000)

where aR(X) mR(X) are respectively the additive
and the multiplicative rating of player X.

I forgot a scaling coefficient. The following
formula will work psychologically better:

ar(X) := 1000 + 200*(log(mR(X)) - log(1000))

except that more players would end up with a negative
rating :-) It'd happen to players whose multiplicative
Ockham rating would go below

1000^(1/5) .=. 3.981...

Such players would be losing to the average
players a bit worse than 250:1.

***

regards,

Wlod