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Career ratings for: Kokkoris, Hristos

  Date of rating  

World Rank Rating +/- Age
09/30/1962#348223769
12/31/1962#349223969
03/31/1963#362223569
06/30/1963#335227371
09/30/1963Inactive223079
12/31/1963Inactive223179
03/31/1964Inactive222879
06/30/1964Inactive226781
12/31/1964#371224971
03/31/1965#406225471
06/30/1965#366228871
09/30/1965#409225173
12/31/1965Inactive225181
03/31/1966Inactive224781
06/30/1966Inactive228181
09/30/1966Inactive224783
03/31/1967#443224473
06/30/1967#423227573
09/30/1967#446224274
12/31/1967Inactive224176
03/31/1968Inactive223684
06/30/1968Inactive226684
09/30/1968Inactive223084
12/31/1968#465224470
03/31/1969#499222461
06/30/1969#466225161
09/30/1969#510221561
12/31/1969#482222663
02/28/1970#552222463
04/30/1970#469223069
06/30/1970#445225469
08/31/1970#450225569
10/31/1970#513222169
12/31/1970#499222971
02/28/1971#510222571
04/30/1971Inactive223179
06/30/1971Inactive225779
08/31/1971Inactive225779
10/31/1971Inactive222478
12/31/1971Inactive222981
02/29/1972Inactive223581
10/31/1972Inactive223089

These ratings, calculated for Kokkoris, Hristos, 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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