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Career ratings for: Bergraser, Volf

  Date of rating  

World Rank Rating +/- Age
12/31/1958#279219470
06/30/1959#318219170
12/31/1959Inactive218780
03/31/1960Inactive218580
06/30/1960Inactive217980
09/30/1960Inactive217880
12/31/1960Inactive222676
03/31/1961#356224273
06/30/1961#353223773
09/30/1961#356223473
12/31/1961Inactive222387
03/31/1962Inactive223484
06/30/1962Inactive222984
09/30/1962Inactive222879
12/31/1962Inactive221888
03/31/1963Inactive222786
06/30/1963Inactive222386
03/31/1964#364223975
06/30/1964#366223775
09/30/1964Inactive223775
12/31/1964#374224870
03/31/1965#400226374
06/30/1965#414224871
09/30/1965#414224972
12/31/1965Inactive225079
03/31/1966Inactive225684
06/30/1966Inactive224181
09/30/1966Inactive224582
03/31/1967#435225466
06/30/1967#460223565
09/30/1967#456223765
12/31/1967#428224566
03/31/1968#436224675
06/30/1968#461223374
09/30/1968#473223174
12/31/1968Inactive223675
03/31/1969Inactive224285
06/30/1969Inactive223885
09/30/1969Inactive223885
12/31/1969Inactive223786
02/28/1970Inactive223586

These ratings, calculated for Bergraser, Volf, 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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