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Career ratings for: Katalymov, Boris N

  Date of rating  

World Rank Rating +/- Age
06/30/1958#213230972
12/31/1958#220231072
06/30/1959#239232475
12/31/1959#230232775
03/31/1960#256232575
06/30/1960Inactive231386
09/30/1960Inactive231286
12/31/1960Inactive231486
03/31/1961Inactive231986
09/30/1961Inactive234878
12/31/1961Inactive235278
03/31/1962Inactive235278
06/30/1962Inactive235180
09/30/1962Inactive234189
12/31/1962Inactive234589
03/31/1963Inactive236078
06/30/1963Inactive236379
09/30/1963Inactive235983
12/31/1963Inactive236283
03/31/1964Inactive238283
06/30/1964Inactive238583
09/30/1964Inactive238486
12/31/1964Inactive238886
03/31/1965Inactive238786
06/30/1965Inactive238886
09/30/1965Inactive238788
12/31/1965Inactive239088
03/31/1966Inactive239678
06/30/1966Inactive239778
09/30/1966Inactive239978
12/31/1966Inactive239978
03/31/1967#244239372
06/30/1967#236239472
09/30/1967#233239372
12/31/1967#232239472
03/31/1968Inactive238583
06/30/1968Inactive238583
09/30/1968Inactive238183
12/31/1968Inactive238583
03/31/1969#200243074
06/30/1969#201243374
09/30/1969#195243174
12/31/1969#187243674
02/28/1970#233241672
04/30/1970Inactive241979
06/30/1970Inactive241879
08/31/1970Inactive241979
10/31/1970Inactive242079
12/31/1970Inactive242279
02/28/1971#232241274
04/30/1971Inactive241279
06/30/1971Inactive241379
08/31/1971Inactive241379
10/31/1971Inactive241479
12/31/1971Inactive241579
02/29/1972Inactive243476
04/30/1972Inactive243579
06/30/1972Inactive243579
08/31/1972Inactive243679
10/31/1972Inactive241875
12/31/1972Inactive242075
02/28/1973Inactive243587
10/31/1973Inactive242186
12/31/1973Inactive242286
02/28/1975Inactive244485
04/30/1975Inactive244486
06/30/1975Inactive244386
08/31/1975Inactive244486
10/31/1975Inactive242985
12/31/1975Inactive243485
02/29/1976#146248174
04/30/1976#147248375
06/30/1976#147248475
08/31/1976#156248775
10/31/1976#175247774
12/31/1976#168248274
02/28/1977#121251969
04/30/1977#123252369
06/30/1977#121252069
08/31/1977#120252369
10/31/1977#136251069
12/31/1977#135251169
02/28/1978Inactive252179
04/30/1978Inactive252079
06/30/1978#122252071
08/31/1978#123252371
10/31/1978#140251271
12/31/1978#144251271
02/28/1979Inactive252175
04/30/1979Inactive252375
06/30/1979Inactive252081
08/31/1979Inactive251981
10/31/1979Inactive250981
12/31/1979Inactive251381
01/31/1980#131252372
02/29/1980#118253474
03/31/1980#118253374
04/30/1980#114253674
05/31/1980#114253774
06/30/1980Inactive254076
07/31/1980Inactive254076
08/31/1980Inactive253876
09/30/1980Inactive253876
10/31/1980Inactive252876
11/30/1980Inactive252876
12/31/1980Inactive252576
01/31/1981Inactive252482
02/28/1981Inactive253085
03/31/1981Inactive252985
04/30/1981Inactive253085
05/31/1981Inactive252985
06/30/1981Inactive253287
07/31/1981Inactive253187
08/31/1981Inactive253087
09/30/1981Inactive253087
10/31/1981Inactive252187
11/30/1981Inactive252287
12/31/1981Inactive252287
01/31/1995#1949231165
02/28/1995#1936231165
03/31/1995#1951231065
04/30/1995#1929231265
05/31/1995#1950231165
06/30/1995#1976230965
07/31/1995#1992230965
08/31/1995#2002231165
09/30/1995#2003231365
10/31/1995#1992231565
11/30/1995#1501235364
12/31/1995#1508235564
01/31/1996#2019232067
02/29/1996#2024232167
03/31/1996#1510236062
04/30/1996#1496236062
05/31/1996#1504235962
06/30/1996#1525235562
07/31/1996#1571234961
08/31/1996#1573235161
09/30/1996#1582235061
10/31/1996#1569235261
11/30/1996#1252238161
12/31/1996#1169238962
01/31/1997#1513235866
02/28/1997#1501235966
03/31/1997#1592235270
04/30/1997#1584235370
05/31/1997#1591235070
06/30/1997#1623234870
07/31/1997#1705234269
08/31/1997#1696234369
09/30/1997#1685234269
10/31/1997#1646234469
11/30/1997#1300237269
12/31/1997#1216237970
01/31/1998Inactive234776
02/28/1998Inactive234976
03/31/1998Inactive234480
04/30/1998Inactive234680
05/31/1998Inactive234580
06/30/1998Inactive234280
07/31/1998Inactive233679
08/31/1998Inactive233679
09/30/1998Inactive233579
10/31/1998Inactive233579
11/30/1998Inactive236379
12/31/1998Inactive237080
01/11/1999Inactive237080
01/18/1999Inactive237080
01/25/1999Inactive237180
02/01/1999Inactive233986
02/08/1999Inactive233986
02/15/1999Inactive233986
02/22/1999Inactive234086
03/01/1999Inactive233986
03/08/1999Inactive234086
03/15/1999Inactive234086
03/22/1999Inactive234186
03/29/1999Inactive234186
11/29/1999Inactive233279
12/06/1999Inactive235879
12/13/1999Inactive235879
12/20/1999Inactive235779
12/27/1999Inactive235879
01/03/2000Inactive236679
01/10/2000Inactive236679
01/17/2000Inactive236779
01/24/2000Inactive236879
01/31/2000Inactive236879
02/07/2000Inactive233982
02/14/2000Inactive233982
02/21/2000Inactive234082
02/28/2000Inactive234182
03/06/2000Inactive234182
03/13/2000Inactive234082
03/20/2000Inactive234082
03/27/2000Inactive233982
04/03/2000Inactive233882
04/10/2000Inactive233283
04/17/2000Inactive233283
04/24/2000Inactive233183
05/01/2000Inactive233183
05/08/2000Inactive233083
05/15/2000Inactive233283
05/22/2000Inactive233183
05/29/2000Inactive233183
06/05/2000Inactive233083
06/12/2000Inactive233083
06/19/2000Inactive233083
06/26/2000Inactive232983
07/03/2000Inactive233083
07/10/2000Inactive232883
07/17/2000Inactive232883
07/24/2000Inactive232883
07/31/2000Inactive232883
08/07/2000Inactive232283
08/14/2000Inactive232383
08/21/2000Inactive232383
08/28/2000Inactive232383
09/04/2000Inactive232283
09/11/2000Inactive232483
09/18/2000Inactive232483
09/25/2000Inactive232583
10/02/2000Inactive232383
10/09/2000Inactive232483
10/16/2000Inactive232283
10/23/2000Inactive232283
10/30/2000Inactive232283
11/06/2000Inactive232483
11/13/2000Inactive232483
11/20/2000Inactive232683
11/27/2000Inactive232683
07/16/2001#1568234074
07/23/2001#1567233974
07/30/2001#1562233974
08/06/2001#1571234074
08/13/2001#1599233774
08/20/2001#1598233774
08/27/2001#1616233774
09/03/2001#1614233874
09/10/2001#1623233874

These ratings, calculated for Katalymov, Boris N, 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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