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Career ratings for: Collins, Sam

  Date of rating  

World Rank Rating +/- Age
04/05/1999#4204207475
04/12/1999#4222207475
04/19/1999#4231207475
04/26/1999#4257207475
07/05/1999#4299206475
07/12/1999#4315206375
07/19/1999#4329206475
07/26/1999#4377206475
08/02/1999#4315206375
08/09/1999#4326206575
08/16/1999#4354206475
08/23/1999#4396206375
08/30/1999#4409206475
09/06/1999#4324206073
09/13/1999#4355206073
09/20/1999#4368206173
09/27/1999#4385206173
10/04/1999#4284205973
10/11/1999#4312205873
10/18/1999#4362205873
10/25/1999#4382205873
11/01/1999#4205205975
11/08/1999#4220205975
11/15/1999#4231207073
11/22/1999#4267206671
11/29/1999#4295206671
12/06/1999#4172209575
12/13/1999#4196209473
12/20/1999#4209209373
12/27/1999#4232209473
01/03/2000#4203209473
01/10/2000#4231209473
01/17/2000#4262209373
01/24/2000#4277209373
01/31/2000#4279209473
02/07/2000#3826209573
02/14/2000#3828209573
02/21/2000#3361217964
02/28/2000#3367218064
03/06/2000#3355217964
03/13/2000#3556215965
03/20/2000#3562215965
03/27/2000#3565215965
04/03/2000#3571215965
04/10/2000#3608215265
04/17/2000#3631215265
04/24/2000#3649215165
05/01/2000#3653215065
05/08/2000#3584215865
05/15/2000#3592216065
05/22/2000#3314219061
05/29/2000#3322218861
06/05/2000#3331218961
06/12/2000#3322218961
06/19/2000#3358218961
06/26/2000#3360218861
07/03/2000#3367218861
07/10/2000#3513217360
07/17/2000#3525217360
07/24/2000#3444218260
07/31/2000#3268220158
08/07/2000#3242220058
08/14/2000#3229220257
08/21/2000#3229220257
08/28/2000#3252220157
09/04/2000#3261220157
09/11/2000#3341219257
09/18/2000#3335219357
09/25/2000#3342219357
10/02/2000#3343219157
10/09/2000#3304219157
10/16/2000#3285219157
10/23/2000#3301219257
10/30/2000#3309219157
11/06/2000#3744214156
11/13/2000#3800213656
11/20/2000#3933212856
11/27/2000#3977211856
12/04/2000#3982212056
12/11/2000#3411218556
12/18/2000#3537217656
12/25/2000#3543217656
01/01/2001#3564217656
01/08/2001#3556217556
01/15/2001#3546217656
01/22/2001#3561217656
01/29/2001#3571217756
02/05/2001#3511217856
02/12/2001#3364217756
02/19/2001#3378217756
02/26/2001#3042220957
03/05/2001#3046220957
03/12/2001#3048220757
03/19/2001#3328218057
03/26/2001#3331218057
04/02/2001#3337217957
04/09/2001#3329218057
04/16/2001#3506216157
04/23/2001#3510216057
04/30/2001#3536216257
05/07/2001#3593216157
05/14/2001#3389218457
05/21/2001#3390218257
05/28/2001#3405218158
06/04/2001#3393218258
06/11/2001#3366218458
06/18/2001#3383218358
06/25/2001#3381218258
07/02/2001#3380218358
07/09/2001#3368218358
07/16/2001#3697214958
07/23/2001#3718214858
07/30/2001#3752214758
08/06/2001#3818214460
08/13/2001#3857213759
08/20/2001#3890213558
08/27/2001#4025212758
09/03/2001#4063212458
09/10/2001#4104211957

These ratings, calculated for Collins, Sam, 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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