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Career ratings for: Valaker, OJ.

  Date of rating  

World Rank Rating +/- Age
07/31/1992#2366220475
08/31/1992#2438220275
09/30/1992#2476220075
10/31/1992#2507219975
11/30/1992#2508219575
12/31/1992#2496220275
01/31/1993#2697218172
02/28/1993#2690218172
03/31/1993#2687218172
04/30/1993#2742218172
05/31/1993#2769217872
06/30/1993#2741218272
07/31/1993Inactive219280
08/31/1993#2769219374
09/30/1993#2798219274
10/31/1993#2842218974
11/30/1993#2870218974
12/31/1993#2880219374
01/31/1994#3131217275
02/28/1994#3183217275
03/31/1994#3216217075
04/30/1994#3199216975
05/31/1994#3217217175
06/30/1994#3210217375
07/31/1994Inactive218279
08/31/1994Inactive218884
09/30/1994Inactive218684
10/31/1994Inactive218184
11/30/1994Inactive218284
12/31/1994Inactive218584
01/31/1995Inactive216486
02/28/1995Inactive216386
03/31/1995Inactive216286
04/30/1995Inactive216386
05/31/1995Inactive216286
06/30/1995Inactive216686

These ratings, calculated for Valaker, OJ., 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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