Company:World Football Elo Ratings
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The are based on the Elo rating system developed by Dr Arpad Elo This system is used by FIDE the international chess federation to rate chess players In Bob Runyan adapted the Elo rating system to international football and posted the results on the Internet He was also the first maintainer of the World Football Elo Ratings web site The system was adapted to football by adding a weighting for the kind of match an adjustment for the home team advantage and an adjustment for goal difference in the match result These ratings take into account all international A matches for which results could be found Ratings tend to converge on a team's true strength relative to its competitors after about matches Ratings for teams with fewer than matches should be considered provisional Match data are primarily from web site maintained by Raoul S da Silva Curiel Other sources are
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