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Career ratings for: Maslov, Leonid P

  Date of rating  

World Rank Rating +/- Age
03/31/1962#272233372
06/30/1962#249233872
09/30/1962#252233772
12/31/1962#256234172
03/31/1963Inactive232582
06/30/1963Inactive233182
09/30/1963Inactive233082
12/31/1963Inactive233382
03/31/1967Inactive236478
06/30/1967Inactive236778
09/30/1967Inactive236878
12/31/1967Inactive236978
03/31/1968Inactive235689
06/30/1968Inactive235989
09/30/1968Inactive235689
12/31/1968Inactive236189
02/28/1970Inactive234883
04/30/1970Inactive233786
06/30/1970Inactive233986
08/31/1970Inactive234086
10/31/1970Inactive234286
12/31/1970Inactive234586
02/29/1972Inactive235379
04/30/1972Inactive234380
06/30/1972Inactive234680
08/31/1972Inactive234780
10/31/1972Inactive234680
12/31/1972Inactive234880
02/28/1973Inactive239676
04/30/1973Inactive238776
06/30/1973Inactive239176
08/31/1973Inactive239176
10/31/1973Inactive239276
12/31/1973Inactive239276
02/28/1974Inactive239086
04/30/1974Inactive237987
06/30/1974Inactive238187
08/31/1974Inactive238187
10/31/1974Inactive237987
12/31/1974Inactive238087

These ratings, calculated for Maslov, Leonid P, 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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