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Career ratings for: Witt, Leslie

  Date of rating  

World Rank Rating +/- Age
12/31/1964#376224569
03/31/1965#396226769
06/30/1965#399226469
09/30/1965#404225469
12/31/1965Inactive224779
03/31/1966Inactive226079
06/30/1966Inactive225779
09/30/1966Inactive224979
12/31/1966#413225667
03/31/1967#427226467
06/30/1967#434226167
09/30/1967#437225467
12/31/1967Inactive224777
03/31/1968Inactive225677
06/30/1968Inactive225377
09/30/1968Inactive224277
12/31/1968Inactive223888
03/31/1969Inactive225288
06/30/1969Inactive225188
09/30/1969Inactive224288

These ratings, calculated for Witt, Leslie, 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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