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Career ratings for: Barden, Leonhard William

  Date of rating  

World Rank Rating +/- Age
06/30/1950#203226473
12/31/1950#166225872
06/30/1951#188229175
12/31/1951#148231467
06/30/1952#153232772
12/31/1952#173229971
06/30/1953#153231775
12/31/1953#144232470
06/30/1954#171233971
12/31/1954#178233568
06/30/1955#188235568
12/31/1955Inactive233077
06/30/1956Inactive234578
12/31/1956Inactive232288
06/30/1957#222233375
12/31/1957#208233767
06/30/1958#198234063
12/31/1958#211232567
06/30/1959#197236263
12/31/1959#201235363
03/31/1960#216235263
06/30/1960#179235967
09/30/1960#179235867
12/31/1960#193235361
03/31/1961#230235560
06/30/1961#208237361
09/30/1961#208237061
12/31/1961#223235161
03/31/1962#245235361
06/30/1962#217236762
09/30/1962#217237160
12/31/1962#234235766
03/31/1963#240235866
06/30/1963#223237367
09/30/1963#219237268
12/31/1963#234235875
03/31/1964#257234371
06/30/1964#242235771
09/30/1964#240235672
12/31/1964Inactive233977
03/31/1965Inactive235681
06/30/1965Inactive236881
09/30/1965Inactive236782
12/31/1965Inactive234988

These ratings, calculated for Barden, Leonhard William, 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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