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Career ratings for: Perez

  Date of rating  

World Rank Rating +/- Age
01/31/1993#2439222667
02/28/1993#2439222567
03/31/1993#2451222467
04/30/1993#2484222567
05/31/1993#2525222167
06/30/1993#2491222367
07/31/1993#2507222267
08/31/1993#2559222467
09/30/1993#2558222667
10/31/1993#2592222667
11/30/1993#2606222767
12/31/1993#2625222767
01/31/1994Inactive221977
02/28/1994Inactive221777
03/31/1994Inactive221577
04/30/1994Inactive221577
05/31/1994Inactive221677
06/30/1994Inactive221677
07/31/1994Inactive221777
08/31/1994Inactive221877
09/30/1994Inactive221977
10/31/1994Inactive221877
11/30/1994Inactive222077
12/31/1994Inactive221977
01/31/1995Inactive221088
02/28/1995Inactive220988
03/31/1995Inactive220888
04/30/1995Inactive220988
05/31/1995Inactive220788
06/30/1995Inactive220988
07/31/1995Inactive220988
08/31/1995Inactive221288
09/30/1995Inactive221488
10/31/1995Inactive221688
11/30/1995Inactive221588
12/31/1995Inactive221688

These ratings, calculated for Perez, 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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