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Career ratings for: Sikora Lerch, Jan

  Date of rating  

World Rank Rating +/- Age
03/31/1968#478220365
06/30/1968#492220265
09/30/1968#502219865
12/31/1968#528217564
03/31/1969#525219874
06/30/1969#526219974
09/30/1969#528219774
12/31/1969#519217673
02/28/1970#599217473
04/30/1970Inactive219684
06/30/1970Inactive219484
08/31/1970Inactive219684
10/31/1970Inactive219684
12/31/1970Inactive217383
02/28/1971Inactive216983
02/29/1972#549219766
04/30/1972#520220765
06/30/1972#518220765
08/31/1972#518220965
10/31/1972#557220665
12/31/1972#549219365
02/28/1973#606219175
04/30/1973#583220074
06/30/1973#582220274
08/31/1973#587220374
10/31/1973#558220174
12/31/1973#549218774
02/28/1974#555221364
04/30/1974#556222063
06/30/1974#594222063
08/31/1974#601222163
10/31/1974#581221563
12/31/1974#585220163
02/28/1975#588221372
04/30/1975#581222072
06/30/1975#565222072
08/31/1975#560222172
10/31/1975#562221972
12/31/1975#571220872
02/29/1976#454230163
04/30/1976#448230863
06/30/1976#446231063
08/31/1976#449231463
10/31/1976#456231463
12/31/1976#491230863
02/28/1977#457231371
04/30/1977#456232864
06/30/1977#451232764
08/31/1977#413235757
10/31/1977#408236357
12/31/1977#384237754
02/28/1978#305241453
04/30/1978#332240254
06/30/1978#349240154
08/31/1978#348241055
10/31/1978#338241255
12/31/1978#380239454
02/28/1979#410238254
04/30/1979#441237654
06/30/1979#429237554
08/31/1979#423237855
10/31/1979#420238155
12/31/1979#401238954
01/31/1980#481236252
02/29/1980#452235854
03/31/1980#465235854
04/30/1980#467235654
05/31/1980#473235754
06/30/1980#470236054
07/31/1980#475236054
08/31/1980#472236054
09/30/1980#476236054
10/31/1980#476236154
11/30/1980#482236154
12/31/1980#472236255
01/31/1981#487236357
02/28/1981#478235559
03/31/1981#488235459
04/30/1981#499235059
05/31/1981#501234959
06/30/1981#510235259
07/31/1981#523235259
08/31/1981#516235259
09/30/1981#515235259
10/31/1981#517235459
11/30/1981#516235559
12/31/1981#504235961
01/31/1982#503235864
02/28/1982#523235366
03/31/1982#524235266
04/30/1982#537235066
05/31/1982#537234866
06/30/1982#534235166
07/31/1982#543234966
08/31/1982#535235367
09/30/1982#535235159
10/31/1982#553235559
11/30/1982#553235559
12/31/1982#542236160
01/31/1983#528235961
02/28/1983#530235862
03/31/1983#539235862
04/30/1983#539235762
05/31/1983#548235662
06/30/1983#541235962
07/31/1983#543235862
08/31/1983#541235962
09/30/1983#561236266
10/31/1983#563236066
11/30/1983#565236266
12/31/1983#557236367
01/31/1984#571236269
02/29/1984#565235770
03/31/1984#559235970
04/30/1984#581235870
05/31/1984#582236070
06/30/1984#578236370
07/31/1984#584236370
08/31/1984#586236570
09/30/1984Inactive236675
10/31/1984Inactive236775
11/30/1984Inactive236775
12/31/1984Inactive237177
01/31/1985Inactive237078
02/28/1985Inactive236779
03/31/1985Inactive236679
04/30/1985Inactive236180
05/31/1985Inactive236180
06/30/1985Inactive236380
07/31/1985Inactive236480
08/31/1985Inactive236580
09/30/1985Inactive236686
10/31/1985Inactive236886
11/30/1985Inactive237186
12/31/1985Inactive237388
01/31/1986Inactive237289
03/31/1989#883236364
04/30/1989#903235964
05/31/1989#914235964
06/30/1989#918235964
07/31/1989#926235864
08/31/1989#912236464
09/30/1989#897236764
10/31/1989#930236164
11/30/1989#938236264
12/31/1989#941236764
01/31/1990#869238663
02/28/1990#866238463
03/31/1990#980236472
04/30/1990#1005236172
05/31/1990#1011235772
06/30/1990#1001236172
07/31/1990#1006236072
08/31/1990#986236672
09/30/1990#990236872
10/31/1990#1014236472
11/30/1990#1022236172
12/31/1990#1020236372
01/31/1991#835239570
02/28/1991#841239470
03/31/1991Inactive237878
04/30/1991Inactive237878
05/31/1991Inactive238078
06/30/1991Inactive238178
07/31/1991Inactive238078
08/31/1991Inactive238678
09/30/1991Inactive238778
10/31/1991Inactive238278
11/30/1991Inactive238278
12/31/1991Inactive238478
01/31/1992#896239569
02/29/1992#901239569
03/31/1992#1017238173
04/30/1992#1021237773
05/31/1992#1026237773
06/30/1992#1046237673
07/31/1992#1049237773
08/31/1992#1025238173
09/30/1992#1028238373
10/31/1992#1043238373
11/30/1992#1042238173
12/31/1992#1035238573
01/31/1993#922239966
02/28/1993#919239966
03/31/1993#1008238667
04/30/1993#1013238767
05/31/1993#1022238567
06/30/1993#1016238767
07/31/1993#1030238567
08/31/1993#1020238767
09/30/1993#1005238967
10/31/1993#1020238667
11/30/1993#1021238867
12/31/1993#1017238967
01/31/1994#934240262
02/28/1994#849241361
03/31/1994#901240361
04/30/1994#903240461
05/31/1994#906240661
06/30/1994#900240561
07/31/1994#907240661
08/31/1994#916240561
09/30/1994#914240561
10/31/1994#942240061
11/30/1994#956240361
12/31/1994#941240461
01/31/1995#1161238064
02/28/1995#1069238963
03/31/1995#1139238163
04/30/1995#1136238363
05/31/1995#1148238263
06/30/1995#1147238363
07/31/1995#1150238363
08/31/1995#1173238563
09/30/1995#1166238563
10/31/1995#1186238563
11/30/1995#1194238463
12/31/1995#1173238863
01/31/1996#1516235968
02/29/1996#1285238270
03/31/1996#1367237370
04/30/1996#1348237470
05/31/1996#1344237370
06/30/1996#1344237270
07/31/1996#1343237170
08/31/1996#1351237170
09/30/1996#1510235768
10/31/1996#1527235668
11/30/1996#1524235568
12/31/1996#1509235968
01/31/1997#1518235861
02/28/1997#1346237461
03/31/1997#1396236761
04/30/1997#1402236862
05/31/1997#1416236562
06/30/1997#1415236562
07/31/1997#1438236462
08/31/1997#1426236462
09/30/1997#1525235562
10/31/1997#1511235562
11/30/1997#1523235362
12/31/1997#1519235361
01/31/1998#1615234255
02/28/1998#1551234955
03/31/1998#1603234755
04/30/1998#1596234955
05/31/1998#1596234955
06/30/1998#1616234755
07/31/1998#1617234755
08/31/1998#1615234655
09/30/1998#1684233955
10/31/1998#1703233755
11/30/1998#1710233555
12/31/1998#1575234554
01/11/1999#1453234554
01/18/1999#1454234654
01/25/1999#1534234053
02/01/1999#1461234257
02/08/1999#1464234257
02/15/1999#1471234257
02/22/1999#1479234357
03/01/1999#1415234658
03/08/1999#1419234758
03/15/1999#1421234658
03/22/1999#1419234858
03/29/1999#1421234858
04/05/1999#1472234758
04/12/1999#1475234758
04/19/1999#1479234758
04/26/1999#1488234758
05/03/1999#1502234656
05/10/1999#1502234556
05/17/1999#1500234556
05/24/1999#1516234456
05/31/1999#1523234456
06/07/1999#1541234256
06/14/1999#1540234256
06/21/1999#1545234156
06/28/1999#1548234256
07/05/1999#1547234356
07/12/1999#1549234456
07/19/1999#1548234556
07/26/1999#1551234556
08/02/1999#1520234556
08/09/1999#1520234756
08/16/1999#1522234456
08/23/1999#1528234556
08/30/1999#1526234456
09/06/1999#1518234556
09/13/1999#1518234456
09/20/1999#1520234556
09/27/1999#1519234556
10/04/1999#1553234156
10/11/1999#1563234156
10/18/1999#1575234156
10/25/1999#1635233655
11/01/1999#1633233555
11/08/1999#1633233455
11/15/1999#1638233555
11/22/1999#1646233455
11/29/1999#1650233555
12/06/1999#1657233355
12/13/1999#1656233455
12/20/1999#1654233355
12/27/1999#1657233355
01/03/2000#1656233456
01/10/2000#1654233556
01/17/2000#1652233656
01/24/2000#1652233656
01/31/2000#1629234056
02/07/2000#1564234159
02/14/2000#1565234159
02/21/2000#1572234259
02/28/2000#1567234359
03/06/2000#1527234659
03/13/2000#1528234559
03/20/2000#1527234559
03/27/2000#1526234459
04/03/2000#1525234359
04/10/2000#1550234059
04/17/2000#1555234159
04/24/2000#1563233959
05/01/2000#1567234059
05/08/2000#1552234061
05/15/2000#1553234161
05/22/2000#1554234061
05/29/2000#1559234061
06/05/2000#1562234061
06/12/2000#1853231557
06/19/2000#1870231557
06/26/2000#1869231557
07/03/2000#1876231557
07/10/2000#1867231557
07/17/2000#1870231557
07/24/2000#1872231557
07/31/2000#1883231557
08/07/2000#1888231357
08/14/2000#1892231357
08/21/2000#1897231357
08/28/2000#1888231457
09/04/2000#1889231357
09/11/2000#1879231557
09/18/2000#1878231457
09/25/2000#1882231557
10/02/2000#1885231457
10/09/2000#1908230956
10/16/2000#1911230856
10/23/2000#1915230756
10/30/2000#2088229456
11/06/2000#2059229356
11/13/2000#2079229356
11/20/2000#2112229656
11/27/2000#2109229656
12/04/2000#2111229856
12/11/2000#2099229856
12/18/2000#2101229956
12/25/2000#2101230056
01/01/2001#2107230156
01/08/2001#2102230056
01/15/2001#2102230156
01/22/2001#2113230156
01/29/2001#2130230156
02/05/2001#2085230356
02/12/2001#2060229857
02/19/2001#2062229857
02/26/2001#2064229857
03/05/2001#2062229757
03/12/2001#2006230257
03/19/2001#2007230157
03/26/2001#2013230157
04/02/2001#2014230057
04/09/2001#2014230057
04/16/2001#2032229957
04/23/2001#2036229757
04/30/2001#2051229757
05/07/2001#2064229757
05/14/2001#2078229658
05/21/2001#2082229558
05/28/2001#2079229458
06/04/2001#2076229558
06/11/2001#2066229658
06/18/2001#1937230860
06/25/2001#1939230860
07/02/2001#1926230960
07/09/2001#1925230860
07/16/2001#1941230860
07/23/2001#1947230760
07/30/2001#1949230760
08/06/2001#1965230760
08/13/2001#1967230660
08/20/2001#1974230760
08/27/2001#1956230959
09/03/2001#1958231059
09/10/2001#1964231059

These ratings, calculated for Sikora Lerch, Jan, 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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