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Career ratings for: Ivanov, An

  Date of rating  

World Rank Rating +/- Age
01/31/1994#2013229774
02/28/1994#2000230074
03/31/1994#2017229974
04/30/1994#2006230074
05/31/1994#2039230074
06/30/1994#2046229874
07/31/1994#2043229974
08/31/1994#2069229974
09/30/1994#2097229874
10/31/1994#2102229674
11/30/1994#2333228072
12/31/1994#2251228774
01/31/1995Inactive228984
02/28/1995Inactive229184
03/31/1995Inactive229184
04/30/1995Inactive229384
05/31/1995Inactive229184
06/30/1995Inactive229184
07/31/1995Inactive229084
08/31/1995Inactive229384
09/30/1995Inactive229284
10/31/1995Inactive229484
11/30/1995Inactive227583
12/31/1995Inactive228485

These ratings, calculated for Ivanov, An, 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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