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Career ratings for: Kiviaho, Bob

  Date of rating  

World Rank Rating +/- Age
01/31/1993Inactive219782
02/28/1993Inactive219982
03/31/1993Inactive219782
04/30/1993Inactive219782
05/31/1993Inactive219582
06/30/1993Inactive220582
07/31/1993Inactive220382
08/31/1993Inactive220182
09/30/1993Inactive219482
10/31/1993Inactive219482
11/30/1993Inactive219482
12/31/1993Inactive219482
01/31/1995Inactive218476
02/28/1995#3473217873
03/31/1995#3521217773
04/30/1995#3527217673
05/31/1995#3552217773
06/30/1995#3494218373
07/31/1995#3504218373
08/31/1995#3574218273
09/30/1995#3691217573
10/31/1995#3678217873
11/30/1995#3532218971
12/31/1995#3553219071
01/31/1996Inactive218387
02/29/1996Inactive217883
03/31/1996Inactive217783
04/30/1996Inactive217583
05/31/1996Inactive217583
06/30/1996Inactive218083
07/31/1996Inactive217983
08/31/1996Inactive217779
09/30/1996Inactive217079
10/31/1996Inactive217079
11/30/1996Inactive218177
12/31/1996Inactive218277
01/31/1997#3469221767
02/28/1997#3565221267
03/31/1997#3618221167
04/30/1997#3641220967
05/31/1997#3657220867
06/30/1997#3602221267
07/31/1997#3594221367
08/31/1997#3656220967
09/30/1997#3739220367
10/31/1997#3795220567
11/30/1997#3663221267
12/31/1997#3692221267
01/31/1998Inactive220676
02/28/1998Inactive220276
03/31/1998Inactive220376
04/30/1998Inactive220376
05/31/1998Inactive220376
06/30/1998Inactive220676
07/31/1998Inactive220776
08/31/1998Inactive220277
09/30/1998Inactive219677
10/31/1998Inactive219677
11/30/1998Inactive220376
12/31/1998Inactive220276
01/11/1999Inactive220276
01/18/1999Inactive220376
01/25/1999Inactive220376
02/01/1999Inactive219887
02/08/1999Inactive219887
02/15/1999Inactive219887
02/22/1999Inactive219887
03/01/1999Inactive219287
03/08/1999Inactive219387
03/15/1999Inactive219287
03/22/1999Inactive219387
03/29/1999Inactive219487
04/05/1999Inactive219587
04/12/1999Inactive219587
04/19/1999Inactive219587
04/26/1999Inactive219587
05/03/1999Inactive219487
05/10/1999Inactive219387
05/17/1999Inactive219387
05/24/1999Inactive219287
05/31/1999Inactive219287
06/07/1999Inactive219187
06/14/1999Inactive219287
06/21/1999Inactive219187
06/28/1999Inactive219287
07/05/1999Inactive219787
07/12/1999Inactive219787
07/19/1999Inactive219887
07/26/1999Inactive219887
08/02/1999Inactive219987
08/09/1999Inactive220087
08/16/1999Inactive219887
08/23/1999Inactive219987
08/30/1999Inactive219887
09/06/1999Inactive219588
09/13/1999Inactive219588
09/20/1999Inactive219588
09/27/1999Inactive219588
10/04/1999Inactive219188
10/11/1999Inactive219188
10/18/1999Inactive219188
10/25/1999Inactive219188
11/01/1999Inactive219288
11/08/1999Inactive219188
11/15/1999Inactive219288
11/22/1999Inactive219188
11/29/1999Inactive219288
12/06/1999Inactive219987
12/13/1999Inactive220087
12/20/1999Inactive219987
12/27/1999Inactive219987
01/03/2000Inactive220187
01/10/2000Inactive220187
01/17/2000Inactive220287
01/24/2000Inactive220387
01/31/2000Inactive220387

These ratings, calculated for Kiviaho, Bob, 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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