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Career ratings for: Contedini, Ennio

  Date of rating  

World Rank Rating +/- Age
12/31/1960Inactive228976
03/31/1961#338226666
06/30/1961#369221565
09/30/1961#362222364
12/31/1961#285229568
03/31/1962Inactive225876
06/30/1962#348220774
09/30/1962#361221673
12/31/1962Inactive228778
03/31/1963Inactive225086
06/30/1963Inactive219984
09/30/1963Inactive221083
12/31/1963Inactive228089
03/31/1964#341227272
06/30/1964#374223072
09/30/1964#357223872
12/31/1964#325229973
03/31/1965Inactive227782
06/30/1965Inactive223382
09/30/1965Inactive224182
12/31/1965Inactive230283
03/31/1968Inactive225587
06/30/1968Inactive221787
09/30/1968Inactive222187
12/31/1968Inactive227487
02/28/1973Inactive224982
04/30/1973Inactive223283
06/30/1973Inactive221178
08/31/1973Inactive221178
10/31/1973Inactive221578
12/31/1973Inactive225378
02/28/1974#516226270
04/30/1974#529224870
06/30/1974#597221769
08/31/1974#604221869
10/31/1974#580221769
12/31/1974#553223867
02/28/1975Inactive225579
04/30/1975Inactive224279
06/30/1975Inactive221778
08/31/1975Inactive221878
10/31/1975Inactive222178
12/31/1975Inactive224677
06/30/1976Inactive222389
08/31/1976Inactive222789
10/31/1976Inactive223289
12/31/1976Inactive225888

These ratings, calculated for Contedini, Ennio, 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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