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Career ratings for: Van der Vliet, Fredrik

  Date of rating  

World Rank Rating +/- Age
12/31/1971#486216373
02/29/1972#571213771
04/30/1972#548213871
06/30/1972#545214071
08/31/1972#541213569
10/31/1972#591213469
12/31/1972Inactive216283
02/28/1973#586221565
04/30/1973#570221565
06/30/1973#569221865
08/31/1973#589220164
10/31/1973#560220064
12/31/1973#510225167
02/28/1974#559220873
04/30/1974#564220673
06/30/1974#605220773
08/31/1974#626219173
10/31/1974#599218673
12/31/1974Inactive223876
02/28/1975Inactive220184
04/30/1975Inactive220084
06/30/1975Inactive220184
08/31/1975Inactive218583
10/31/1975Inactive218383
12/31/1975Inactive223887
02/29/1976#500227067
04/30/1976#500227267
06/30/1976#497227467
08/31/1976#506226367
10/31/1976#511226467
12/31/1976#487230967
02/28/1977#427233259
04/30/1977#440233559
06/30/1977#438233459
08/31/1977#462232459
10/31/1977#469232159
12/31/1977#418235959
02/28/1978#413235159
04/30/1978#424234959
06/30/1978#448234959
08/31/1978#480234259
10/31/1978#485234059
12/31/1978#441237059
02/28/1979#460236159
04/30/1979#466236359
06/30/1979#455236159
08/31/1979#461235259
10/31/1979#476235259
12/31/1979#427237959
01/31/1980#430238556
02/29/1980#425237360
03/31/1980#435237360
04/30/1980#434237660
05/31/1980#434237760
06/30/1980#437238060
07/31/1980#441238160
08/31/1980#446237559
09/30/1980#449237559
10/31/1980#447237459
11/30/1980#452237459
12/31/1980#403239059
01/31/1981#460237257
02/28/1981#470235758
03/31/1981#483235658
04/30/1981#490235758
05/31/1981#488235658
06/30/1981#495236158
07/31/1981#505236058
08/31/1981#504235858
09/30/1981#504235758
10/31/1981#506235858
11/30/1981#506235958
12/31/1981#470237358
01/31/1982#485236763
02/28/1982#518235565
03/31/1982#519235565
04/30/1982#513235765
05/31/1982#512235665
06/30/1982#511236065
07/31/1982#594232661
08/31/1982#599232761
09/30/1982#599232561
10/31/1982#620232861
11/30/1982#622232861
12/31/1982#596234361
01/31/1983#597233264
02/28/1983#621232365
03/31/1983#632232265
04/30/1983#636231759
05/31/1983#646231559
06/30/1983#641231959
07/31/1983#621232858
08/31/1983#631232658
09/30/1983#647232958
10/31/1983#639232658
11/30/1983#644232858
12/31/1983#640232557
01/31/1984#693231058
02/29/1984#702229958
03/31/1984#691230158
04/30/1984#708230460
05/31/1984#705230560
06/30/1984#705230960
07/31/1984#681232263
08/31/1984#692232363
09/30/1984#689232363
10/31/1984#681232463
11/30/1984#707232363
12/31/1984#713232463
01/31/1985#737231864
02/28/1985#756230965
03/31/1985#763230865
04/30/1985#756230767
05/31/1985#747230667
06/30/1985#753230967
07/31/1985#735232372
08/31/1985#729232372
09/30/1985#720232472
10/31/1985#736232572
11/30/1985#730232772
12/31/1985#731232671
01/31/1986#785232073
02/28/1986#801230873
03/31/1986#810231073
04/30/1986Inactive230977
05/31/1986Inactive230977
06/30/1986Inactive230977
07/31/1986Inactive232682
08/31/1986Inactive232482
09/30/1986Inactive232582
10/31/1986Inactive232482
11/30/1986Inactive232582
12/31/1986Inactive232681
01/31/1987Inactive231883
02/28/1987Inactive230984
03/31/1987Inactive230884
04/30/1987Inactive230687
05/31/1987Inactive230587
06/30/1987Inactive230887
01/31/1990#1516227872
02/28/1990#1525227172
03/31/1990#1498227472
04/30/1990#1515227472
05/31/1990#1531227072
06/30/1990#1514227672
07/31/1990#1461228672
08/31/1990#1476228772
09/30/1990#1499228572
10/31/1990#1541228072
11/30/1990#1557227572
12/31/1990#1547228072
01/31/1991Inactive227382
02/28/1991Inactive226982
03/31/1991Inactive227282
04/30/1991Inactive227482
05/31/1991Inactive227682
06/30/1991Inactive227982
07/31/1991Inactive228982
08/31/1991Inactive229082
09/30/1991Inactive228882
10/31/1991Inactive228282
11/30/1991Inactive228082
12/31/1991Inactive228482
01/31/1995Inactive221782
02/28/1995Inactive221282
03/31/1995Inactive221582
04/30/1995Inactive221682
05/31/1995Inactive221682
06/30/1995Inactive222182
07/31/1995Inactive222782
08/31/1995Inactive222782
09/30/1995Inactive222682
10/31/1995Inactive222582
11/30/1995Inactive222382
12/31/1995Inactive222482
01/31/1996#2958225271
02/29/1996#3014224971
03/31/1996#2991225271
04/30/1996#2991225171
05/31/1996#2974225171
06/30/1996#2913225471
07/31/1996#2862225771
08/31/1996#2934225571
09/30/1996#3004225271
10/31/1996#3018225171
11/30/1996#3031224971
12/31/1996#3068225071
01/31/1997Inactive225181
02/28/1997Inactive224881
03/31/1997Inactive225181
04/30/1997Inactive225181
05/31/1997Inactive225081
06/30/1997Inactive225481
07/31/1997Inactive225781
08/31/1997Inactive225581
09/30/1997Inactive225181
10/31/1997Inactive225181
11/30/1997Inactive224881
12/31/1997Inactive224781
03/06/2000Inactive220987
03/13/2000Inactive220887
03/20/2000Inactive220887
03/27/2000Inactive220787
04/03/2000Inactive220587
04/10/2000Inactive220787
04/17/2000Inactive218481
04/24/2000Inactive218381
05/01/2000Inactive218381
05/08/2000Inactive218281
05/15/2000Inactive218381
05/22/2000Inactive218281
05/29/2000Inactive218281
06/05/2000Inactive218281
06/12/2000Inactive218281
06/19/2000Inactive218281
06/26/2000Inactive218281
07/03/2000Inactive218281
07/10/2000Inactive218681
07/17/2000Inactive218681
07/24/2000Inactive218681
07/31/2000Inactive218681
08/07/2000Inactive218781
08/14/2000Inactive218881
08/21/2000Inactive218881
08/28/2000Inactive218981
09/04/2000Inactive218881
09/11/2000Inactive218881
09/18/2000Inactive218881
09/25/2000Inactive218881
10/02/2000Inactive218781
10/09/2000Inactive218581
10/16/2000Inactive218481
10/23/2000Inactive218381
10/30/2000Inactive218381
11/06/2000Inactive218481
11/13/2000Inactive218381
11/20/2000Inactive218681
11/27/2000Inactive218681
12/04/2000Inactive218881
12/11/2000Inactive218781
12/18/2000Inactive218881
12/25/2000Inactive218981
01/01/2001Inactive219081
01/08/2001Inactive218981
01/15/2001Inactive219081
01/22/2001Inactive219081
01/29/2001Inactive219081
02/05/2001Inactive219181
02/12/2001Inactive218282
02/19/2001Inactive218282
02/26/2001Inactive219485
03/05/2001Inactive219485
03/12/2001Inactive219188
03/19/2001Inactive219088
03/26/2001Inactive219088
04/02/2001Inactive219088
04/09/2001Inactive218988
04/16/2001Inactive219188
04/30/2001Inactive217985
05/07/2001Inactive217380
05/14/2001Inactive217380
05/21/2001Inactive217280
05/28/2001Inactive217280
06/04/2001Inactive217280
06/11/2001Inactive217380
06/18/2001Inactive217480
06/25/2001Inactive217380
07/02/2001Inactive217480
07/09/2001Inactive217480
07/16/2001Inactive217780
07/23/2001Inactive217680
07/30/2001Inactive217680
08/06/2001Inactive217680
08/13/2001Inactive217980
08/20/2001Inactive218080
08/27/2001Inactive218080
09/03/2001Inactive218080
09/10/2001Inactive218080

These ratings, calculated for Van der Vliet, Fredrik, 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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