Back to names list

Career ratings for: Grigorian, Levon Ashotovich

  Date of rating  

World Rank Rating +/- Age
03/31/1967#127246371
06/30/1967#127246171
09/30/1967#125246371
12/31/1967#175242772
03/31/1968Inactive245581
06/30/1968Inactive245381
09/30/1968Inactive245181
12/31/1968Inactive241882
02/28/1970Inactive238285
02/28/1971Inactive240087
02/29/1972Inactive246982
04/30/1972Inactive249883
06/30/1972Inactive249683
08/31/1972Inactive249783
10/31/1972Inactive249683
12/31/1972Inactive247183
02/28/1973Inactive245785
04/30/1973Inactive248386
06/30/1973Inactive248386
08/31/1973Inactive248386
10/31/1973Inactive248486
12/31/1973Inactive245986
02/28/1974Inactive245687
04/30/1974Inactive248188
06/30/1974Inactive247888
08/31/1974Inactive247988
10/31/1974Inactive247788
12/31/1974Inactive245488
02/28/1975#145248372
04/30/1975#118250472
06/30/1975#118250172
08/31/1975#116250272
10/31/1975#119250472
12/31/1975#139248872
02/29/1976Inactive247983
04/30/1976Inactive250183
06/30/1976Inactive250083
08/31/1976Inactive250383
10/31/1976Inactive250783
12/31/1976Inactive249283

These ratings, calculated for Grigorian, Levon Ashotovich, 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.

Back to top

Home