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Career ratings for: Jamieson, Robert Murray

  Date of rating  

World Rank Rating +/- Age
06/30/1974#522228374
08/31/1974#526228574
10/31/1974#505228374
12/31/1974#521227475
02/28/1975#469231374
04/30/1975#454231773
06/30/1975Inactive232480
08/31/1975Inactive232980
10/31/1975Inactive233280
12/31/1975Inactive232681
02/29/1976Inactive230984
04/30/1976Inactive231484
12/31/1976#303241268
02/28/1977#325240263
04/30/1977#331240363
06/30/1977#323240663
08/31/1977#321241263
10/31/1977#313241463
12/31/1977#329240867
02/28/1978#341239671
04/30/1978#343239371
06/30/1978#359239872
08/31/1978#359240472
10/31/1978#365240063
12/31/1978#383239364
02/28/1979#413238266
04/30/1979#421238166
06/30/1979#403238466
08/31/1979#408238566
10/31/1979#305242664
12/31/1979#314242465
01/31/1980#332242565
02/29/1980#352240865
03/31/1980#355240865
04/30/1980#363240765
05/31/1980#367240865
06/30/1980#356241565
07/31/1980#358241565
08/31/1980#318242766
09/30/1980#320242766
10/31/1980#301243573
11/30/1980#275245166
12/31/1980#280244467
01/31/1981#291244467
02/28/1981#321242367
03/31/1981#322242267
04/30/1981#334242067
05/31/1981#329242067
06/30/1981#327242667
07/31/1981#335242567
08/31/1981#295243767
09/30/1981#297243767
10/31/1981#270244971
11/30/1981Inactive244675
12/31/1981Inactive244176
01/31/1982Inactive243876
02/28/1982Inactive242276
03/31/1982Inactive242176
04/30/1982Inactive242076
05/31/1982Inactive241976
06/30/1982Inactive242576
07/31/1982Inactive242276
08/31/1982Inactive243977
09/30/1982Inactive243677
10/31/1982#166250765
11/30/1982#162250866
12/31/1982#162250966
01/31/1983#154251166
02/28/1983#176249966
03/31/1983#178249866
04/30/1983#183249866
05/31/1983#186249866
06/30/1983#181250466
07/31/1983#179250366
08/31/1983#154251566
09/30/1983#159251866
10/31/1983#165251273
11/30/1983#165251575
12/31/1983#164251175
01/31/1984#157251475
02/29/1984#190249875
03/31/1984#192249975
04/30/1984#198250075
05/31/1984#197250275
06/30/1984#193250875
07/31/1984#188250875
08/31/1984#165252275
09/30/1984#166252275
10/31/1984Inactive251984
11/30/1984Inactive252085
12/31/1984Inactive252085
01/31/1985Inactive252285
02/28/1985Inactive250885
03/31/1985Inactive250685
04/30/1985Inactive250285
05/31/1985Inactive250385
06/30/1985Inactive250885
07/31/1985Inactive250985
08/31/1985Inactive252285
09/30/1985Inactive252285
12/31/1992Inactive225983
01/31/1993#2212225573
02/28/1993#1853229671
03/31/1993#1863229571
04/30/1993#1897229471
05/31/1993#1910229371
06/30/1993#1900229471
07/31/1993#1876229471
08/31/1993#1883229771
09/30/1993#1892229771
10/31/1993#1901229971
11/30/1993#1886230371
12/31/1993Inactive226777
01/31/1994Inactive224883
02/28/1994Inactive228881
03/31/1994Inactive228681
04/30/1994Inactive228581
05/31/1994Inactive228881
06/30/1994Inactive228781
07/31/1994Inactive229081
08/31/1994Inactive229181
09/30/1994Inactive229081
10/31/1994Inactive229081
11/30/1994Inactive229681
12/31/1994Inactive225988
01/31/1995Inactive227481
02/28/1995Inactive231080
03/31/1995Inactive230880
04/30/1995Inactive230880
05/31/1995Inactive230880
06/30/1995Inactive233176
07/31/1995Inactive233276
08/31/1995Inactive233676
09/30/1995Inactive233676
10/31/1995Inactive233976
11/30/1995Inactive234276
12/31/1995Inactive232078
06/30/1996Inactive232787
07/31/1996Inactive232887
08/31/1996Inactive233187
09/30/1996Inactive233087
10/31/1996Inactive233287
11/30/1996Inactive233587
12/31/1996Inactive231389

These ratings, calculated for Jamieson, Robert Murray, 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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