Sonny Moore's Power Ratings Description
Sonny Moore's Power Ratings were devised in 1974. This hobby began
so I could make a comparison of any two teams in a given sport, so as
to get an indication on which team would win and by how many points if
a game were played between them (predictive intention). I also wanted a systematic ranking of
all the teams in order from best to worst based on this comparison, as
if all the teams were to play against one another. A team's power rating reflects
how a team has performed from all the games played,
not just one or two, taking into account wins and losses, the opposing teams' power
ratings and the actual score difference of the games played*. This explains why team
A may have a higher power rating than team B, even though team B may have beaten
team A or have a better won/lost record. The ratings are compiled by using only
statistical and historical data. The most recent games played are more
meaningful in compiling the ratings. Only games played against the teams in
the ratings are used to formulate the power ratings. A diminishing returns
principle is used to prevent higher rated teams from gaining power rating
points and moving up in the rankings when the victory margin is being run up
against a weaker team. Beginning 2000, a team's power rating value will be
displayed atleast two decimal places instead of rounding off to whole numbers,
so as to give a more precise and greater distinction in the ratings by reducing
identical values amoung the teams. This will in turn give a more accurate
ranking within each sport.
* Earl Nall has compiled data comparing ratings that use MOV (margin of victory, or the score difference)
verses not using MOV.
Sonny Moore's Computer Power Ratings
disclaimer.
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