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Career ratings for: Rodriguez, Jo

  Date of rating  

World Rank Rating +/- Age
03/31/1967#285236760
06/30/1967#277236860
09/30/1967#270237160
12/31/1967#269237060
03/31/1968#282235867
06/30/1968#291235967
09/30/1968#285235967
12/31/1968#294236167
03/31/1969#273238259
06/30/1969#278238459
09/30/1969#275238259
12/31/1969#272238559
02/28/1970#292238359
04/30/1970#268238866
06/30/1970#270238666
08/31/1970#269238866
10/31/1970#273238966
12/31/1970#274238866
02/28/1971#277238466
04/30/1971#299236960
06/30/1971#302237060
08/31/1971#313237060
10/31/1971#309237160
12/31/1971#301236860
02/29/1972#336237260
04/30/1972#315237867
06/30/1972#314237967
08/31/1972#315238067
10/31/1972#328237767
12/31/1972#319237667
02/28/1973#341237367
04/30/1973Inactive237877
06/30/1973Inactive238077
08/31/1973Inactive238077
10/31/1973Inactive238077
12/31/1973Inactive237877
02/28/1974Inactive237477
04/30/1974Inactive237688
06/30/1974Inactive237688
08/31/1974Inactive237788
10/31/1974Inactive237388
12/31/1974Inactive237188
02/28/1975Inactive237388

These ratings, calculated for Rodriguez, Jo, 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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