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Career ratings for: Tot, Bora

  Date of rating  

World Rank Rating +/- Age
12/31/1938#108223173
12/31/1939Inactive222983
12/31/1947Inactive233281
12/31/1949Inactive234676
06/30/1950Inactive234376
12/31/1950Inactive233486
06/30/1951Inactive234086
06/30/1956Inactive232989
06/30/1957#177239563
12/31/1957#160240363
06/30/1958#172238072
12/31/1958#175239072
06/30/1959Inactive237182
12/31/1959Inactive238382
03/31/1960#200236766
06/30/1960#201234068
09/30/1960#201233968
12/31/1960#198235168
03/31/1961#219236275
06/30/1961Inactive234177
09/30/1961Inactive233977
12/31/1961Inactive234777
03/31/1962Inactive235486
06/30/1962Inactive234088
09/30/1962Inactive233888
12/31/1962Inactive234088

These ratings, calculated for Tot, Bora, 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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