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Career ratings for: Sampouw, Jacobus S

  Date of rating  

World Rank Rating +/- Age
10/31/1972#565219467
12/31/1972#536221471
02/28/1973#570223469
04/30/1973#519226767
06/30/1973#523226867
08/31/1973#510227766
10/31/1973Inactive219077
12/31/1973Inactive220981
02/28/1974Inactive222779
04/30/1974Inactive225977
06/30/1974#540226668
08/31/1974#541227467
10/31/1974#596219472
12/31/1974#577221473
02/28/1975#575223373
04/30/1975#538226072
06/30/1975Inactive226078
08/31/1975Inactive226777
10/31/1975Inactive219182
12/31/1975Inactive221484
02/29/1976Inactive222983
04/30/1976Inactive225782
06/30/1976Inactive225989
08/31/1976Inactive226888
04/30/1978Inactive228676
06/30/1978#559227967
08/31/1978#566228467
10/31/1978#591226764
12/31/1978#590227764
02/28/1979#583228664
04/30/1979#568230466
06/30/1979#566229669
08/31/1979#561229769
10/31/1979#603225872
12/31/1979#589227172
01/31/1980#649227272
02/29/1980#586228272
03/31/1980#599228272
04/30/1980#556230275
05/31/1980#563230375
06/30/1980Inactive229979
07/31/1980Inactive230079
08/31/1980Inactive229979
09/30/1980Inactive229979
10/31/1980Inactive225982
11/30/1980Inactive225982
12/31/1980Inactive226783
01/31/1981Inactive226683
02/28/1981Inactive227383
03/31/1981Inactive227283
04/30/1981Inactive229085
05/31/1981Inactive229085
02/28/1982#719224158
03/31/1982#719224158
04/30/1982#718224458
05/31/1982#717224258
06/30/1982#738223958
07/31/1982#742223758
08/31/1982#741223958
09/30/1982#741223658
10/31/1982#801222158
11/30/1982#800222158
12/31/1982#794223158
01/31/1983#772222858
02/28/1983#753224765
03/31/1983#763224765
04/30/1983#755225165
05/31/1983#765225065
06/30/1983#761224665
07/31/1983#761224665
08/31/1983#763224465
09/30/1983#784224765
10/31/1983#778222665
11/30/1983#777222865
12/31/1983#760223365
01/31/1984#801223165
02/29/1984#779224674
03/31/1984#776224874
04/30/1984#796225374
05/31/1984#796225474
06/30/1984#803225074
07/31/1984#812225174
08/31/1984#822225174
09/30/1984#823225174
10/31/1984#839223474
11/30/1984#882223374
12/31/1984#879224174
01/31/1985#899223974
02/28/1985Inactive225685
03/31/1985Inactive225585
04/30/1985Inactive225584
05/31/1985Inactive225584
06/30/1985Inactive225084
07/31/1985Inactive225284
08/31/1985Inactive225184
09/30/1985Inactive225184
10/31/1985Inactive223485
11/30/1985Inactive223785
12/31/1985Inactive224385
01/31/1986Inactive224185

These ratings, calculated for Sampouw, Jacobus S, 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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