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Career ratings for: Kushnir, Alla

  Date of rating  

World Rank Rating +/- Age
02/29/1972#403233461
04/30/1972#381234061
06/30/1972#378234161
08/31/1972#388233661
10/31/1972#387234661
12/31/1972#390234061
02/28/1973#437233060
04/30/1973#418233760
06/30/1973#418233960
08/31/1973#424233560
10/31/1973#399234560
12/31/1973#399233960
02/28/1974#437232367
04/30/1974#424232867
06/30/1974#443232867
08/31/1974#457232467
10/31/1974#415233167
12/31/1974#424232667
02/28/1975#365236063
04/30/1975#359236563
06/30/1975#351236563
08/31/1975#362236263
10/31/1975#346237063
12/31/1975#355236863
02/29/1976#437231663
04/30/1976#433232263
06/30/1976#430232463
08/31/1976#438232463
10/31/1976#433233363
12/31/1976#454233363
02/28/1977#431232971
04/30/1977#439233671
06/30/1977#433233571
08/31/1977#447233471
10/31/1977#442234071
12/31/1977#446233771
02/28/1978Inactive233181
04/30/1978Inactive233381
06/30/1978Inactive233381
08/31/1978Inactive233381
10/31/1978Inactive233881
12/31/1978Inactive233581

These ratings, calculated for Kushnir, Alla, 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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