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Career ratings for: Niemela, Ilmari

  Date of rating  

World Rank Rating +/- Age
06/30/1957#241230866
12/31/1957#218231867
06/30/1958#221229375
12/31/1958Inactive230576
06/30/1959#257229467
12/31/1959#242230866
03/31/1960#274230666
06/30/1960Inactive228276
09/30/1960Inactive228176
12/31/1960#250229675
03/31/1961#307230075
06/30/1961Inactive227081
09/30/1961#329227064
12/31/1961#296228364
03/31/1962#316228963
06/30/1962#319226563
09/30/1962#332226664
12/31/1962#319227664
03/31/1963#325228363
06/30/1963#345225965
09/30/1963#323226772
12/31/1963#316227772
03/31/1964#335228372
06/30/1964#353225973
09/30/1964Inactive226783
12/31/1964Inactive227078
03/31/1965Inactive228678
06/30/1965Inactive226079
09/30/1965Inactive226686
12/31/1965Inactive228089
03/31/1966Inactive228689
12/31/1966Inactive229089
03/31/1967Inactive229489

These ratings, calculated for Niemela, Ilmari, 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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