Back to names list

Career ratings for: Ubayana, Harry

  Date of rating  

World Rank Rating +/- Age
01/31/1998#3671220473
02/28/1998#3694220473
03/31/1998#3717220573
04/30/1998#3572221773
02/01/1999Inactive219583
02/08/1999Inactive219683
02/15/1999Inactive219583
02/22/1999Inactive219683
03/01/1999Inactive219483
03/08/1999Inactive219583
03/15/1999Inactive219583
03/22/1999Inactive219683
03/29/1999Inactive219683
04/05/1999Inactive219783
04/12/1999Inactive219783
04/19/1999Inactive219883
04/26/1999Inactive219883
05/03/1999Inactive220983
05/10/1999Inactive220883
05/17/1999Inactive220883
05/24/1999Inactive220783
05/31/1999Inactive220783

These ratings, calculated for Ubayana, Harry, 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