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Career ratings for: Carlsson, Mats

  Date of rating  

World Rank Rating +/- Age
01/31/1980#660226275
02/29/1980#637223573
03/31/1980#654223473
04/30/1980#641223573
05/31/1980#654223673
06/30/1980#641224073
07/31/1980#650224073
08/31/1980#647223473
09/30/1980#650223373
10/31/1980#655223573
11/30/1980#668223573
12/31/1980#670223173
01/31/1981#762217072
02/28/1981#691222471
03/31/1981#702222371
04/30/1981#704222171
05/31/1981#696222171
06/30/1981#702222471
07/31/1981#725222371
08/31/1981#732221871
09/30/1981#730221771
10/31/1981#744221971
11/30/1981#737222071
12/31/1981#727223869
01/31/1982Inactive215982
02/28/1982Inactive221681
03/31/1982Inactive221581
04/30/1982Inactive221581
05/31/1982Inactive221381
06/30/1982Inactive221681
07/31/1982Inactive221581
08/31/1982Inactive221281
09/30/1982Inactive220981
10/31/1982Inactive221581
11/30/1982Inactive221581
12/31/1982Inactive223479

These ratings, calculated for Carlsson, Mats, 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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