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Career ratings for: Nokso Koivisto, Aki

  Date of rating  

World Rank Rating +/- Age
01/31/1997#4605209370
02/28/1997#4618209370
03/31/1997#4668209170
04/30/1997#4702208970
05/31/1997#4734208970
06/30/1997#4721209270
07/31/1997#4753209370
08/31/1997#4777209470
09/30/1997#4802209570
10/31/1997#4894209570
11/30/1997#4889209770
12/31/1997#4936209670
01/31/1998#4673211068
02/28/1998#4688211068
03/31/1998#4710211068
04/30/1998#4741211068
05/31/1998#4756211068
06/30/1998#4811211068
07/31/1998#4844211268
08/31/1998#4907211168
09/30/1998#4959211568
10/31/1998#5016211668
11/30/1998#5070211668
12/31/1998#5122211468
01/11/1999#4802211468
01/18/1999#4811211468
01/25/1999#4824211468
02/01/1999Inactive210377
02/08/1999Inactive210477
02/15/1999Inactive210377
02/22/1999Inactive210377
03/01/1999Inactive210377
03/08/1999Inactive210477
03/15/1999Inactive210377
03/22/1999Inactive210377
03/29/1999Inactive210377
04/05/1999Inactive210377
04/12/1999Inactive210377
04/19/1999Inactive210377
04/26/1999Inactive210377
05/03/1999Inactive210377
05/10/1999Inactive210277
05/17/1999Inactive210277
05/24/1999Inactive210277
05/31/1999Inactive210377
06/07/1999Inactive210377
06/14/1999Inactive210377
06/21/1999Inactive210277
06/28/1999Inactive210277
07/05/1999Inactive210377
07/12/1999Inactive210377
07/19/1999Inactive210377
07/26/1999Inactive210477
08/02/1999Inactive210477
08/09/1999Inactive210677
08/16/1999Inactive210577
08/23/1999Inactive210477
08/30/1999Inactive210477
09/06/1999Inactive210677
09/13/1999Inactive210677
09/20/1999Inactive210777
09/27/1999Inactive210777
10/04/1999Inactive210777
10/11/1999Inactive210777
10/18/1999Inactive210777
10/25/1999Inactive210777
11/01/1999Inactive210877
11/08/1999Inactive210877
11/15/1999Inactive210877
11/22/1999Inactive210877
11/29/1999Inactive210877
12/06/1999Inactive211077
12/13/1999Inactive211077
12/20/1999Inactive210977
12/27/1999Inactive210977
01/03/2000Inactive210977
01/10/2000Inactive211077
01/17/2000Inactive210977
01/24/2000Inactive211077
01/31/2000Inactive211077
02/07/2000Inactive209988
02/14/2000Inactive209988
02/21/2000Inactive210088
02/28/2000Inactive210188
03/06/2000Inactive210088
03/13/2000Inactive209988
03/20/2000Inactive209988
03/27/2000Inactive209988
04/03/2000Inactive210088
04/10/2000Inactive209888
04/17/2000Inactive209888
04/24/2000Inactive209788
05/01/2000Inactive209788
05/08/2000Inactive209688
05/15/2000Inactive209888
05/22/2000Inactive209888
05/29/2000Inactive209688
06/05/2000Inactive209688
06/12/2000Inactive209788
06/19/2000Inactive209788
06/26/2000Inactive209788
07/03/2000Inactive209788
07/10/2000Inactive209888
07/17/2000Inactive209888
07/24/2000Inactive209888
07/31/2000Inactive209888
08/07/2000Inactive209888
08/14/2000Inactive209988
08/21/2000Inactive210088
08/28/2000Inactive209988
09/04/2000Inactive209888
09/11/2000Inactive210088
09/18/2000Inactive210088
09/25/2000Inactive210088
10/02/2000Inactive209988
10/09/2000Inactive210088
10/16/2000Inactive210188
10/23/2000Inactive210288
10/30/2000Inactive210188
11/06/2000Inactive210288
11/13/2000Inactive210288
11/20/2000Inactive210188
11/27/2000Inactive210188
12/04/2000Inactive210388
12/11/2000Inactive210588
12/18/2000Inactive210588
12/25/2000Inactive210588
01/01/2001Inactive210588
01/08/2001Inactive210488
01/15/2001Inactive210588
01/22/2001Inactive210588
01/29/2001Inactive210588
02/05/2001Inactive210488

These ratings, calculated for Nokso Koivisto, Aki, 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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