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Career ratings for: Cruz, Raul C

  Date of rating  

World Rank Rating +/- Age
06/30/1959#311220374
12/31/1959Inactive216777
03/31/1960#331223265
06/30/1960#245227164
09/30/1960#246227164
12/31/1960#281225065
03/31/1961#295231961
06/30/1961#220236360
09/30/1961#221236060
12/31/1961#227234760
03/31/1962#218237357
06/30/1962#188239756
09/30/1962#192239456
12/31/1962#206238556
03/31/1963#220237655
06/30/1963#198239455
09/30/1963#194239455
12/31/1963#200238755
03/31/1964#243235055
06/30/1964#236236255
09/30/1964#234236255
12/31/1964#269234554
03/31/1965#289234752
06/30/1965#279235151
09/30/1965#281235251
12/31/1965#268235452
03/31/1966#294234756
06/30/1966#285235256
09/30/1966#288235556
12/31/1966#286235556
03/31/1967#307234662
06/30/1967#304235262
09/30/1967#305235362
12/31/1967#295235262
03/31/1968Inactive234470
06/30/1968Inactive234970
09/30/1968Inactive234670
12/31/1968Inactive235170
03/31/1969Inactive234780
06/30/1969Inactive235480
09/30/1969Inactive235480
12/31/1969Inactive235980
02/28/1970Inactive235780
02/28/1971Inactive236876
04/30/1971Inactive236879
06/30/1971Inactive237179
08/31/1971Inactive237279
10/31/1971Inactive237479
12/31/1971Inactive237479
02/29/1972Inactive237787

These ratings, calculated for Cruz, Raul C, 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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