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Career ratings for: Conrady, Alphonse

  Date of rating  

World Rank Rating +/- Age
06/30/1957#299212867
12/31/1957#279213768
06/30/1958Inactive211377
12/31/1958Inactive212178
06/30/1959Inactive210888
12/31/1959Inactive212289
03/31/1960Inactive211989
09/30/1962#388215867
12/31/1962#384216767
03/31/1963#411215966
06/30/1963#417215266
09/30/1963Inactive214776
12/31/1963Inactive215376
03/31/1964#415215275
06/30/1964#418214575
09/30/1964Inactive214187
12/31/1964Inactive215377
03/31/1965#470216274
06/30/1965#476215574
09/30/1965Inactive215678
12/31/1965Inactive215288
03/31/1966#468212163
06/30/1966#471210763
09/30/1966#489211964
12/31/1966#504213165
03/31/1967#538212072
06/30/1967#558210772
09/30/1967#546211773
12/31/1967#509212974
03/31/1968Inactive211882
06/30/1968Inactive210582
09/30/1968Inactive211183
12/31/1968Inactive212784

These ratings, calculated for Conrady, Alphonse, 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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