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Career ratings for: Kriens, Michael

  Date of rating  

World Rank Rating +/- Age
07/31/1987#1110216775
08/31/1987#1115217075
09/30/1987#1132216975
07/31/1988Inactive216586
08/31/1988Inactive216886
09/30/1988Inactive216886
10/31/1988Inactive219979
11/30/1988Inactive220079
12/31/1988Inactive220379
01/31/1989Inactive219583
02/28/1989Inactive217379
03/31/1989Inactive217379
04/30/1989Inactive217579
05/31/1989Inactive217579
06/30/1989Inactive217679
07/31/1989Inactive217178
08/31/1989Inactive216978
09/30/1989Inactive216978
10/31/1989Inactive218179
11/30/1989Inactive218279
12/31/1989Inactive218779
01/31/1990Inactive218281
02/28/1990Inactive218083
03/31/1990Inactive218083
04/30/1990Inactive218583
05/31/1990Inactive218383
06/30/1990Inactive218783
07/31/1990Inactive218182
08/31/1990Inactive218082
09/30/1990Inactive218182

These ratings, calculated for Kriens, Michael, 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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