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Career ratings for: Fridjonsson, Joffus

  Date of rating  

World Rank Rating +/- Age
02/28/1982#761219575
03/31/1982#755219975
04/30/1982#755220275
05/31/1982#755220075
06/30/1982#778220175
07/31/1982#785219975
08/31/1982#781219675
09/30/1982#784219475
10/31/1982#819219975
11/30/1982#817219975
12/31/1982#817219975
01/31/1983#790220275
02/28/1983Inactive219286
03/31/1983Inactive219686
04/30/1983Inactive220186
05/31/1983Inactive220086
06/30/1983Inactive220186
07/31/1983Inactive219986
08/31/1983Inactive219386
09/30/1983Inactive219686
10/31/1983Inactive219786
11/30/1983Inactive219886
12/31/1983Inactive219486
01/31/1984Inactive219886

These ratings, calculated for Fridjonsson, Joffus, incorporate all games (against rated opponents) played in the year before the "Date of rating", along with the ratings that were already calculated one year previously. If a player has an insufficient number of games in recent years, there may be gaps in the list, even though you may see ratings listed on previous and/or subsequent dates. Whenever a player has played no rated games for three straight years, or dies, they are removed from the list.

Definition of columns in the above list:

Date of rating is the "effective date" of the rating. The rating calculation does not include any games occurring after the "Date of rating".

World Rank refers to the player's world rank on that date.

Rating is the calculated rating for the player, as of the "Date of Rating". This represents the player's estimated strength on the following day.

+/- is the standard deviation of the player's rating estimate. It is based on a geometric average of the number of rated games played in past years. Players who play very frequently will have a smaller +/- value, indicating a greater confidence in the accuracy of their rating. Players whose +/- value exceeds 76 are classified as "Inactive" due to their infrequent play against rated opponents. Mathematically, a player's rating is an estimate of their exact strength on the day after the "Date of Rating". The +/- value represents the standard deviation of that estimate; the player's true strength on that date should be within one standard deviation of their calculated rating approximately 68% of the time, and within two standard deviations of their calculated rating approximately 95% of the time.

Age is the player's exact age in years, on the "Date of Rating". If a player's age is displayed as a link, that means that this rating was active at the time of their next birthday. Click on the link to see the sorted list of all players' ratings on their birthdays when turning that same age.

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