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Career ratings for: Volman, Y.

  Date of rating  

World Rank Rating +/- Age
07/31/1985#977214071
08/31/1985#970213971
09/30/1985#971213971
10/31/1985#976214071
11/30/1985#961214271
12/31/1985#958214071
01/31/1986#1022214471
02/28/1986#1030213671
03/31/1986#1036213871
04/30/1986#1025214271
05/31/1986#1024214271
06/30/1986#1016214271
07/31/1986Inactive213681
08/31/1986Inactive213381
09/30/1986Inactive213381
10/31/1986Inactive213281
11/30/1986Inactive213381
12/31/1986Inactive213481
01/31/1987Inactive213681
02/28/1987Inactive213081
03/31/1987Inactive213081
04/30/1987Inactive213281
05/31/1987Inactive213281
06/30/1987Inactive213481

These ratings, calculated for Volman, Y., 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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