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Career ratings for: Barendregt, Johan Teunis

  Date of rating  

World Rank Rating +/- Age
06/30/1954Inactive223782
12/31/1954Inactive223282
06/30/1958Inactive222780
12/31/1958Inactive222580
06/30/1959#255229868
12/31/1959#238231866
03/31/1960#273230857
06/30/1960#241228058
09/30/1960#241227958
12/31/1960#253229158
03/31/1961#316229158
06/30/1961#325226659
09/30/1961#326227157
12/31/1961#299227956
03/31/1962#314229358
06/30/1962#315227458
09/30/1962#323227361
12/31/1962#316227961
03/31/1963#336226856
06/30/1963#347225657
09/30/1963#341225057
12/31/1963#309228556
03/31/1964#317229761
06/30/1964#329228561
09/30/1964#329228061
12/31/1964#339229062
03/31/1965#315232957
06/30/1965#330231957
09/30/1965#333231657
12/31/1965#308232357
03/31/1966#287235057
06/30/1966#302234257
09/30/1966#299235157
12/31/1966#289235457
03/31/1967#303234964
06/30/1967#318234264
09/30/1967#309234964
12/31/1967#297235264
03/31/1968#304234773
06/30/1968#323234073
09/30/1968#325234272
12/31/1968#316235072
03/31/1969#418229059
06/30/1969#422228859
09/30/1969#408229559
12/31/1969#390230359
02/28/1970#412231359
04/30/1970#385231065
06/30/1970#384230465
08/31/1970#386230665
10/31/1970#390231565
12/31/1970#384232065
02/28/1971#387231566
04/30/1971#399228762
06/30/1971#412228562
08/31/1971#426228562
10/31/1971#416228461
12/31/1971#405228761
02/29/1972#468229062
04/30/1972#444229670
06/30/1972#446229470
08/31/1972#446229570
10/31/1972#480229169
12/31/1972#468229569
02/28/1973#494229169
04/30/1973Inactive229680
06/30/1973Inactive229580
08/31/1973Inactive229680
10/31/1973Inactive229479
12/31/1973Inactive229779
02/28/1974Inactive229279

These ratings, calculated for Barendregt, Johan Teunis, 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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