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Career ratings for: Bermejo Arruego, Luis

  Date of rating  

World Rank Rating +/- Age
08/31/1997#4088218073
09/30/1997#4069218173
10/31/1997#4099218373
11/30/1997#4148218073
12/31/1997#4197217873
01/31/1998#4040217874
02/28/1998#4042217974
03/31/1998#4053218074
04/30/1998#4071218174
05/31/1998#3841219875
06/30/1998#3853219975
07/31/1998#3942219475
08/31/1998Inactive217383
09/30/1998Inactive217483
10/31/1998Inactive217583
11/30/1998Inactive217183
12/31/1998Inactive216983
01/11/1999Inactive216983
01/18/1999Inactive217083
01/25/1999Inactive217083
02/01/1999Inactive217084
02/08/1999Inactive217084
02/15/1999Inactive217084
02/22/1999Inactive217084
03/01/1999Inactive216984
03/08/1999Inactive217084
03/15/1999Inactive217084
03/22/1999Inactive217184
03/29/1999Inactive217184
04/05/1999Inactive217384
04/12/1999Inactive217384
04/19/1999Inactive217384
04/26/1999Inactive217384
05/03/1999Inactive217384
05/10/1999Inactive217284
05/17/1999Inactive217284
05/24/1999Inactive217084
05/31/1999Inactive217184
06/07/1999Inactive218786
06/14/1999Inactive218786
06/21/1999Inactive218686
06/28/1999Inactive218786
07/05/1999Inactive219086
07/12/1999Inactive219186
07/19/1999Inactive219186
07/26/1999Inactive219286
08/02/1999Inactive218686
08/09/1999Inactive218886
08/16/1999Inactive218586
08/23/1999Inactive218686
08/30/1999Inactive218586

These ratings, calculated for Bermejo Arruego, Luis, 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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