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Career ratings for: Duin, L.

  Date of rating  

World Rank Rating +/- Age
03/31/1965#462217562
06/30/1965#464217562
09/30/1965#463217562
12/31/1965#425217662
03/31/1966#448216671
06/30/1966#448216571
09/30/1966#464216971
12/31/1966#476216971
03/31/1967Inactive215981
06/30/1967Inactive216081
09/30/1967Inactive216281
12/31/1967Inactive216281
02/28/1970Inactive217976
04/30/1970Inactive218177
06/30/1970Inactive218077
08/31/1970Inactive218277
10/31/1970Inactive218377
12/31/1970Inactive218577
02/28/1971Inactive217486
04/30/1971Inactive217688
06/30/1971Inactive217788
08/31/1971Inactive217788
10/31/1971Inactive217888
12/31/1971Inactive217888
02/28/1973Inactive219185
04/30/1973Inactive219186
06/30/1973Inactive219386
08/31/1973Inactive219486
10/31/1973Inactive219086
12/31/1973Inactive219186

These ratings, calculated for Duin, L., 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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