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Career ratings for: Collier, David

  Date of rating  

World Rank Rating +/- Age
10/31/1996#4380213473
11/30/1996#4563210575
12/31/1996#4400214073
01/31/1997#4568210475
02/28/1997#4580210575
03/31/1997#4622210775
04/30/1997#4654210475
05/31/1997#4684210575
06/30/1997#4669210975
07/31/1997#4695211075
08/31/1997#4571213573
09/30/1997#4591213373
10/31/1997#4260217167
11/30/1997#4521215168
12/31/1997#4263217367
01/31/1998#4640211674
02/28/1998#4652211774
03/31/1998#4658212074
04/30/1998#4703211974
05/31/1998#4718211874
06/30/1998#4767212074
07/31/1998#4800211974
08/31/1998#4496215771
09/30/1998#4530215771
10/31/1998#4372217367
11/30/1998#4616215867
12/31/1998#4420217167
01/11/1999#4117217167
01/18/1999#4123217167
01/25/1999#4133217267
02/01/1999#3959212869
02/08/1999#3964212968
02/15/1999#3987212868
02/22/1999#4018212868
03/01/1999#3999212968
03/08/1999#4009213068
03/15/1999#4012213068
03/22/1999#4015212968
03/29/1999#3976213766
04/05/1999#3956214066
04/12/1999#3972214066
04/19/1999#3981214066
04/26/1999#4000214066
05/03/1999#4003213866
05/10/1999#3993213965
05/17/1999#3986214163
05/24/1999#4009214163
05/31/1999#4029214263
06/07/1999#4014214263
06/14/1999#4021214263
06/21/1999#4033214163
06/28/1999#4040214263
07/05/1999#4007214363
07/12/1999#4019214363
07/19/1999#4029214363
07/26/1999#4063214463
08/02/1999#4037214263
08/09/1999#4047214363
08/16/1999#4062214363
08/23/1999#4101214263
08/30/1999#4109214263
09/06/1999#3774217063
09/13/1999#3793216963
09/20/1999#3802217063
09/27/1999#3814217063
10/04/1999#3757216963
10/11/1999#3774216863
10/18/1999#3822216863
10/25/1999#3833216863
11/01/1999#3645217366
11/08/1999#3652217366
11/15/1999#3670217366
11/22/1999#3685217366
11/29/1999#3707217466
12/06/1999#3772216367
12/13/1999#3737216865
12/20/1999#3745216765
12/27/1999#3757216765
01/03/2000#3617218165
01/10/2000#3634218165
01/17/2000#3655218165
01/24/2000#3668218165
01/31/2000#3671218165
02/07/2000#3629214466
02/14/2000#3631214467
02/21/2000#3648214567
02/28/2000#3652214667
03/06/2000#3633214667
03/13/2000#3663214567
03/20/2000#3668214567
03/27/2000#3672214567
04/03/2000#3613215465
04/10/2000#3584215565
04/17/2000#3607215565
04/24/2000#3623215465
05/01/2000#3632215465
05/08/2000#3637215165
05/15/2000#3649215266
05/22/2000#3653215167
05/29/2000#3669215067
06/05/2000#3674215067
06/12/2000#3672215167
06/19/2000#3713215167
06/26/2000#3716215167
07/03/2000#3729215167
07/10/2000#3700215367
07/17/2000#3714215367
07/24/2000#3732215367
07/31/2000#3754215367
08/07/2000#3752215067
08/14/2000#3755215167
08/21/2000#3769215267
08/28/2000#3786215167
09/04/2000#3809215167
09/11/2000#3529217666
09/18/2000#3528217666
09/25/2000#3537217666
10/02/2000#3543217566
10/09/2000#3503217466
10/16/2000#3491217566
10/23/2000#3507217666
10/30/2000#3522217566
11/06/2000#3359218169
11/13/2000#3383218069
11/20/2000#3469218069
11/27/2000#3465218069
12/04/2000#3472218269
12/11/2000#3557217269
12/18/2000#3589217170
12/25/2000#3603217170
01/01/2001#3616217170
01/08/2001#3465218370
01/15/2001#3458218370
01/22/2001#3464218470
01/29/2001#3485218470
02/05/2001#3455218370
02/12/2001#3593214971
02/19/2001#3610214971
02/26/2001#3606214971
03/05/2001#3616214971
03/12/2001#3588214971
03/19/2001#3581214971
03/26/2001#3592214971
04/02/2001#3589215071
04/09/2001#3611214774
04/16/2001#3600214974
04/23/2001#3606214874
04/30/2001#3654214774
05/07/2001#3699214874
05/14/2001#3715214874
05/21/2001#3717214675
05/28/2001Inactive214576
06/04/2001Inactive214476
06/11/2001Inactive214376
06/18/2001Inactive214476
06/25/2001Inactive214676
07/02/2001Inactive214676
07/09/2001Inactive214576
07/16/2001Inactive214776
07/23/2001Inactive214776
07/30/2001Inactive214776
08/06/2001Inactive214776
08/13/2001Inactive214676
08/20/2001Inactive214676
08/27/2001Inactive214676
09/03/2001Inactive214676
09/10/2001Inactive214676

These ratings, calculated for Collier, 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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