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Career ratings for: Spence, David

  Date of rating  

World Rank Rating +/- Age
08/21/2000Inactive210277
08/28/2000Inactive210377
09/04/2000#4062210674
09/11/2000#4037210274
09/18/2000#4028210274
09/25/2000#4032210174
10/02/2000#4038210074
10/09/2000#3951210974
10/16/2000#3950211074
10/23/2000#3979211174
10/30/2000#3999211174
11/06/2000#3889211274
11/13/2000#3919211174
11/20/2000#4017211074
11/27/2000#4016211174
12/04/2000#4020211374
12/11/2000#3994210974
12/18/2000#4014211074
12/25/2000#4022211074
01/01/2001#4042211074
01/08/2001#4022210874
01/15/2001#4023210874
01/22/2001#4031210974
01/29/2001#4052210974
02/05/2001#4005210874
02/12/2001#3809210874
02/19/2001#3831210874
02/26/2001#3820210874
03/05/2001#3820210874
03/12/2001#3803210974
03/19/2001#3792210874
03/26/2001#3803210874
04/02/2001#3807210974
04/09/2001#3813210974
04/16/2001#3829210974
04/23/2001#3841210774
04/30/2001#3894210674
05/07/2001#3946210874
05/14/2001#3967210474
05/21/2001#3970210374
05/28/2001#3973210374
06/04/2001#3976210274
06/11/2001#3967210174
06/18/2001#3975210274
06/25/2001#3954210474
07/02/2001#3951210474
07/09/2001#3956210374
07/16/2001#3961210474
07/23/2001#3970210474
07/30/2001#4004210474
08/06/2001#4045210474
08/13/2001#4010210975
08/20/2001Inactive211678
08/27/2001Inactive210882
09/03/2001Inactive211082
09/10/2001Inactive210184

These ratings, calculated for Spence, David, 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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