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Career ratings for: Ruiz, J.

  Date of rating  

World Rank Rating +/- Age
04/30/1993#2902214875
05/31/1993#2921214775
06/30/1993#2908214675
07/31/1993#2937214575
08/31/1993#2928216473
09/30/1993#2959216473
10/31/1993#3010216073
11/30/1993#3007216672
12/31/1993#3018216772
01/31/1994Inactive219677
02/28/1994Inactive220277
03/31/1994#3121218274
04/30/1994Inactive213777
05/31/1994Inactive214177
06/30/1994Inactive214077
07/31/1994#3428213874
08/31/1994#3335216573
09/30/1994#3363216373
10/31/1994#3306217171
11/30/1994#3366217570
12/31/1994#3362217570
01/31/1995#3195220672
02/28/1995#3133221072
03/31/1995#3371219173
04/30/1995Inactive213088
05/31/1995Inactive213288
06/30/1995Inactive213288
07/31/1995Inactive212984
08/31/1995Inactive215883
09/30/1995Inactive215883
10/31/1995Inactive216981
11/30/1995Inactive217080
12/31/1995Inactive217380
01/31/1996Inactive220682
02/29/1996Inactive221082
03/31/1996Inactive219284

These ratings, calculated for Ruiz, 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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