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Career ratings for: Hartmann, W.

  Date of rating  

World Rank Rating +/- Age
08/31/1983#498237464
09/30/1983#526237564
10/31/1983#513237864
11/30/1983#518238064
12/31/1983#526237764
01/31/1984#532237564
02/29/1984#513237464
03/31/1984#513237464
04/30/1984#520237964
05/31/1984#517238164
06/30/1984#528238164
07/31/1984#536238164
08/31/1984#572237373
09/30/1984#571237173
10/31/1984#552237773
11/30/1984#570237773
12/31/1984#582237773
01/31/1985#601237573
02/28/1985#592237573
03/31/1985#599237373
04/30/1985#581237573
05/31/1985#577237573
06/30/1985#585237473
07/31/1985#597237573
08/31/1985Inactive236783
09/30/1985Inactive236583
10/31/1985Inactive237283
11/30/1985Inactive237483
12/31/1985Inactive237283
01/31/1986Inactive237083
02/28/1986Inactive236783
03/31/1986Inactive236983
04/30/1986Inactive237083
05/31/1986Inactive237183
06/30/1986Inactive236883
07/31/1986Inactive237183

These ratings, calculated for Hartmann, W., 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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