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Career ratings for: Lehtosaari, Mauri

  Date of rating  

World Rank Rating +/- Age
01/31/1997Inactive211077
02/28/1997Inactive211177
03/31/1997Inactive211077
04/30/1997Inactive210877
05/31/1997Inactive210877
06/30/1997Inactive211177
07/31/1997Inactive211477
08/31/1997Inactive211577
09/30/1997Inactive211577
10/31/1997Inactive211677
11/30/1997Inactive211777
12/31/1997Inactive211477
01/31/1998#4436214565
02/28/1998#4433214565
03/31/1998#4467214565
04/30/1998#4487214665
05/31/1998#4498214665
06/30/1998#4534214765
07/31/1998#4532214965
08/31/1998#4602214865
09/30/1998#4621215165
10/31/1998#4660215265
11/30/1998#4689215265
12/31/1998#4744214965
01/11/1999#4433214965
01/18/1999#4441214965
01/25/1999#4457215065
02/01/1999#3908213774
02/08/1999#3914213874
02/15/1999#3935213774
02/22/1999#3965213774
03/01/1999#3948213874
03/08/1999#3956213974
03/15/1999#3958213874
03/22/1999#3960213874
03/29/1999#3967213874
04/05/1999#3963213974
04/12/1999#3979213874
04/19/1999#3988213974
04/26/1999#4007213974
05/03/1999#3995213874
05/10/1999#4001213874
05/17/1999#4014213874
05/24/1999#4034213874
05/31/1999#4054213874
06/07/1999#4039213974
06/14/1999#4046213974
06/21/1999#4059213874
06/28/1999#4067213874
07/05/1999#4039213974
07/12/1999#4052213974
07/19/1999#4060213974
07/26/1999#4096214074
08/02/1999#4041214274
08/09/1999#4050214374
08/16/1999#4070214274
08/23/1999#4103214174
08/30/1999#4112214274
09/06/1999#4027214374
09/13/1999#4057214374
09/20/1999#4066214374
09/27/1999#4084214374
10/04/1999#4003214374
10/11/1999#4022214374
10/18/1999#4066214374
10/25/1999#4085214374
11/01/1999#3927214474
11/08/1999#3940214474
11/15/1999#3961214474
11/22/1999#3988214474
11/29/1999#4017214474
12/06/1999#3928214674
12/13/1999#3951214674
12/20/1999#3961214574
12/27/1999#3981214574
01/03/2000#3982214574
01/10/2000#4002214574
01/17/2000#4030214574
01/24/2000#4042214574
01/31/2000#4048214574
02/07/2000Inactive213384
02/14/2000Inactive213384
02/21/2000Inactive213484
02/28/2000Inactive213584
03/06/2000Inactive213584
03/13/2000Inactive213484
03/20/2000Inactive213484
03/27/2000Inactive213484
04/03/2000Inactive213484
04/10/2000Inactive213484
04/17/2000Inactive213384
04/24/2000Inactive213284
05/01/2000Inactive213284
05/08/2000Inactive213284
05/15/2000Inactive213384
05/22/2000Inactive213384
05/29/2000Inactive213184
06/05/2000Inactive213284
06/12/2000Inactive213384
06/19/2000Inactive213384
06/26/2000Inactive213284
07/03/2000Inactive213384
07/10/2000Inactive213384
07/17/2000Inactive213484
07/24/2000Inactive213484
07/31/2000Inactive213484
08/07/2000Inactive213584
08/14/2000Inactive213684
08/21/2000Inactive213784
08/28/2000Inactive213684
09/04/2000Inactive213584
09/11/2000Inactive213784
09/18/2000Inactive213784
09/25/2000Inactive213784
10/02/2000Inactive213584
10/09/2000Inactive213684
10/16/2000Inactive213784
10/23/2000Inactive213884
10/30/2000Inactive213784
11/06/2000Inactive213884
11/13/2000Inactive213884
11/20/2000Inactive213784
11/27/2000Inactive213884
12/04/2000Inactive213984
12/11/2000Inactive214084
12/18/2000Inactive214184
12/25/2000Inactive214184
01/01/2001Inactive214184
01/08/2001Inactive213984
01/15/2001Inactive214084
01/22/2001Inactive214084
01/29/2001Inactive214084
02/05/2001Inactive213984

These ratings, calculated for Lehtosaari, Mauri, 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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