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Career ratings for: Cobo Arteaga, Eldis

  Date of rating  

World Rank Rating +/- Age
06/30/1952#169229466
12/31/1952#194223363
06/30/1953#172228469
12/31/1953#171222772
06/30/1954Inactive227479
12/31/1954Inactive222182
12/31/1960#260228170
03/31/1961#326227871
06/30/1961#292230771
09/30/1961#296230571
12/31/1961Inactive227780
03/31/1962#288232260
06/30/1962#243234460
09/30/1962#227236357
12/31/1962#237235657
03/31/1963#247235553
06/30/1963#232236653
09/30/1963#224236954
12/31/1963#227236354
03/31/1964#279232854
06/30/1964#265233854
09/30/1964#257234054
12/31/1964#279233754
03/31/1965#327232153
06/30/1965#320232653
09/30/1965#316232853
12/31/1965#307232453
03/31/1966#297234555
06/30/1966#287235055
09/30/1966#289235555
12/31/1966#255237453
03/31/1967#215240453
06/30/1967#212240853
09/30/1967#196241553
12/31/1967#205241153
03/31/1968#228238755
06/30/1968#235239155
09/30/1968#254237653
12/31/1968#259237952
03/31/1969#247239752
06/30/1969#244240052
09/30/1969#232240953
12/31/1969#227241053
02/28/1970#242241153
04/30/1970#233240856
06/30/1970#234240856
08/31/1970#233240956
10/31/1970#262239555
12/31/1970#262239355
02/28/1971#278238456
04/30/1971#240240455
06/30/1971#250240454
08/31/1971#255240454
10/31/1971#234241455
12/31/1971#225241056
02/29/1972#253241555
04/30/1972#257241159
06/30/1972#258241359
08/31/1972#271240955
10/31/1972#280240155
12/31/1972#265240654
02/28/1973#278240453
04/30/1973#282240254
06/30/1973#283240554
08/31/1973#285240455
10/31/1973#269241156
12/31/1973#271240557
02/28/1974#269240458
04/30/1974#287239555
06/30/1974#293239655
08/31/1974#294239556
10/31/1974#279239757
12/31/1974#289239357
02/28/1975#301239556
04/30/1975#298239558
06/30/1975#294239558
08/31/1975#299239558
10/31/1975#291240159
12/31/1975#295239859
02/29/1976#287239862
04/30/1976#284240164
06/30/1976#275241061
08/31/1976#278241262
10/31/1976#280242062
12/31/1976#296241963
02/28/1977#260243364
04/30/1977#272243364
06/30/1977#295242169
08/31/1977#296242370
10/31/1977#293242770
12/31/1977#301242371
02/28/1978#262243572
04/30/1978#271242973
06/30/1978Inactive241979
08/31/1978Inactive242180
10/31/1978Inactive242680
12/31/1978Inactive242181
02/28/1979Inactive243482
04/30/1979Inactive243183

These ratings, calculated for Cobo Arteaga, Eldis, 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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