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Career ratings for: Medina, J.

  Date of rating  

World Rank Rating +/- Age
01/31/1984#824219267
02/29/1984#839215666
03/31/1984#837215566
04/30/1984#871215566
05/31/1984#869215566
06/30/1984#876215966
07/31/1984#880215966
08/31/1984#885216266
09/30/1984#890216166
10/31/1984#879216266
11/30/1984#927216166
12/31/1984#933216166
01/31/1985Inactive219277
02/28/1985#961215375
03/31/1985#964215075
04/30/1985#955215175
05/31/1985#951215075
06/30/1985#954215275
07/31/1985#974215375
08/31/1985#965215575
09/30/1985#964215575
10/31/1985#968215675
11/30/1985#954215775
12/31/1985#953215575
01/31/1986Inactive218788
02/28/1986Inactive214586
03/31/1986Inactive214586
04/30/1986Inactive214586
05/31/1986Inactive214286
06/30/1986Inactive214786
07/31/1986Inactive214986
08/31/1986Inactive215086
09/30/1986Inactive214986
10/31/1986Inactive214986
11/30/1986Inactive214986
12/31/1986Inactive215086
01/31/1991Inactive223978
02/28/1991Inactive221178
03/31/1991Inactive220978
04/30/1991Inactive221178
05/31/1991Inactive221278
06/30/1991Inactive221778
07/31/1991Inactive221778
08/31/1991Inactive221978
09/30/1991Inactive221978
10/31/1991Inactive221778
11/30/1991Inactive221778
12/31/1991Inactive221778
01/31/1992Inactive223689
02/29/1992Inactive220989
03/31/1992Inactive220789
04/30/1992Inactive220589
05/31/1992Inactive220489
06/30/1992Inactive220989
07/31/1992Inactive221089
08/31/1992Inactive221189
09/30/1992Inactive221289
10/31/1992Inactive221389
11/30/1992Inactive221189
12/31/1992Inactive221489
09/30/1993#2877218075
10/31/1993#2901217975
11/30/1993#2928217875
12/31/1993#2951217975
01/31/1994Inactive218277
02/28/1994Inactive217077
03/31/1994Inactive216877
04/30/1994Inactive216777
05/31/1994Inactive217177
06/30/1994Inactive217377
07/31/1994Inactive217377
08/31/1994Inactive217277
09/30/1994Inactive217186
10/31/1994Inactive217086
11/30/1994Inactive217286
12/31/1994Inactive217186
01/31/1995Inactive217488
02/28/1995Inactive216388
03/31/1995Inactive216288
04/30/1995Inactive216188
05/31/1995Inactive216388
06/30/1995Inactive216688
07/31/1995Inactive216488
08/31/1995Inactive216588

These ratings, calculated for Medina, J., 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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