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Career ratings for: Tan Lian Ann

  Date of rating  

World Rank Rating +/- Age
12/31/1968#552214475
03/31/1969#563214975
06/30/1969#559215275
09/30/1969#563215175
12/31/1969Inactive214486
02/28/1970Inactive214286
04/30/1970Inactive214786
06/30/1970Inactive214786
08/31/1970Inactive214986
10/31/1970#523220768
12/31/1970#531220072
02/28/1971#539219772
04/30/1971#475220172
06/30/1971#485220272
08/31/1971#504220272
10/31/1971Inactive220278
12/31/1971Inactive219382
02/29/1972Inactive219882
04/30/1972#481225375
06/30/1972#482225475
08/31/1972#480225475
10/31/1972#397234264
12/31/1972#441230867
02/28/1973#467231458
04/30/1973#419233558
06/30/1973#419233858
08/31/1973#419233658
10/31/1973#411233860
12/31/1973#437231661
02/28/1974#451231465
04/30/1974#413233465
06/30/1974#430233465
08/31/1974#433233365
10/31/1974#421233067
12/31/1974#465230968
02/28/1975#485230472
04/30/1975#446232471
06/30/1975#435232571
08/31/1975#439232471
10/31/1975#436232574
12/31/1975#470230875
02/29/1976Inactive230882
04/30/1976Inactive233081
06/30/1976Inactive233281
08/31/1976#398234758
10/31/1976#400235059
12/31/1976#432234259
02/28/1977#404234559
04/30/1977#406236059
06/30/1977#400235859
08/31/1977#412235765
10/31/1977#418235666
12/31/1977#433234666
02/28/1978#419234766
04/30/1978#415235766
06/30/1978#435235666
08/31/1978#461235674
10/31/1978#466235575
12/31/1978#482234575
02/28/1979Inactive234675
04/30/1979Inactive235875
06/30/1979Inactive235775
08/31/1979Inactive235285
10/31/1979Inactive235385
12/31/1979Inactive234585
01/31/1980Inactive234785
02/29/1980Inactive235186
03/31/1980Inactive235086
04/30/1980Inactive236486
05/31/1980Inactive236586
06/30/1980Inactive236786
07/31/1980Inactive236886
06/30/1992#1673230175
07/31/1992#1685230375
08/31/1992#1725230275
09/30/1992#1726230475
10/31/1992#1699230875
01/31/1993#1691231475
02/28/1993#1649231775
03/31/1993#1661231675
04/30/1993#1694231475
05/31/1993#1722231175
06/30/1993Inactive229886
07/31/1993Inactive229786
08/31/1993Inactive229686
09/30/1993Inactive229786
10/31/1993Inactive230086
01/31/1994Inactive230786
02/28/1994Inactive231086
03/31/1994Inactive230786
04/30/1994Inactive230486
05/31/1994Inactive230786

These ratings, calculated for Tan Lian Ann, 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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