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Career ratings for: Primavera, Giuseppe

  Date of rating  

World Rank Rating +/- Age
12/31/1948#126224575
12/31/1949Inactive224286
06/30/1950#201226867
12/31/1950#170225266
06/30/1951#199225971
12/31/1951#173224275
06/30/1952Inactive224781
12/31/1952Inactive224380
06/30/1953Inactive225480
12/31/1958Inactive226978
06/30/1959Inactive226180
12/31/1959Inactive226289
03/31/1960Inactive226089
02/28/1970#610215765
04/30/1970#520216464
06/30/1970#514217163
08/31/1970#522217263
10/31/1970#554217762
12/31/1970#554217462
02/28/1971#565215969
04/30/1971#499216568
06/30/1971#506217068
08/31/1971#525217168
10/31/1971#484216970
12/31/1971#485216470
02/29/1972Inactive215976
04/30/1972#538216575
06/30/1972#535216975
08/31/1972#534216975
10/31/1972Inactive216676
12/31/1972Inactive216377
02/28/1973Inactive217077
04/30/1973Inactive217577
06/30/1973#595218769
08/31/1973#598218869
10/31/1973#564218370
12/31/1973#552218170
02/28/1974#571217566
04/30/1974#575217866
06/30/1974#619218566
08/31/1974#627218666
10/31/1974#601218367
12/31/1974#597218465
02/28/1975#618216975
04/30/1975#610217375
06/30/1975Inactive218075
08/31/1975Inactive218075
10/31/1975Inactive217876
12/31/1975#588218374
02/29/1976Inactive216486
04/30/1976Inactive216785
06/30/1976Inactive217586
08/31/1976Inactive217886
10/31/1976Inactive217686
12/31/1976Inactive218185

These ratings, calculated for Primavera, Giuseppe, 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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