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Career ratings for: Platzack, Sven

  Date of rating  

World Rank Rating +/- Age
03/31/1968#468221375
06/30/1968#474222175
09/30/1968#483222075
12/31/1968Inactive223083
03/31/1969Inactive220986
06/30/1969Inactive221886
09/30/1969#412229267
12/31/1969#382231067
02/28/1970#424230767
04/30/1970#423228566
06/30/1970#409229066
08/31/1970#411229266
10/31/1970Inactive229176
12/31/1970Inactive230676
02/28/1971Inactive230276
04/30/1971#410228075
06/30/1971#410228675
08/31/1971#424228775
10/31/1971Inactive228687
12/31/1971Inactive229987
02/29/1972Inactive230487
04/30/1972Inactive228186
06/30/1972Inactive228886
08/31/1972Inactive228886

These ratings, calculated for Platzack, Sven, 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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