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Career ratings for: Petek, P.

  Date of rating  

World Rank Rating +/- Age
01/31/1996#4087215271
02/29/1996#4110215371
03/31/1996#4066215971
04/30/1996#4068215871
05/31/1996#4052215971
06/30/1996#4071215671
07/31/1996#4101215671
08/31/1996#3791218969
09/30/1996#3857218769
10/31/1996#4143216267
11/30/1996#3988217674
12/31/1996#4043217574
01/31/1997Inactive214581
02/28/1997Inactive214581
03/31/1997Inactive215181
04/30/1997Inactive215181
05/31/1997Inactive215181
06/30/1997Inactive215081
07/31/1997Inactive215081
08/31/1997Inactive218279
09/30/1997Inactive217979
10/31/1997Inactive215577
11/30/1997Inactive216884
12/31/1997Inactive216684
10/31/1998Inactive214788

These ratings, calculated for Petek, P., 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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