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Career ratings for: Ryc, Ivo

  Date of rating  

World Rank Rating +/- Age
03/31/1967#465222571
06/30/1967#468222771
09/30/1967#466222571
12/31/1967#450222671
03/31/1968Inactive221881
06/30/1968Inactive221981
09/30/1968#433226661
12/31/1968#435227061
03/31/1969#456226762
06/30/1969#447227162
09/30/1969#450226668
12/31/1969#428227168
02/28/1970#489226868
04/30/1970#439226570
06/30/1970#434226670
08/31/1970#437226770
10/31/1970Inactive226578
12/31/1970Inactive226778
02/28/1971Inactive226378
04/30/1971Inactive226080
06/30/1971Inactive226280
08/31/1971Inactive226280
10/31/1971Inactive226089
12/31/1971Inactive226189
02/29/1972Inactive226589
12/31/1976Inactive224683
02/28/1977Inactive224683
04/30/1977Inactive224583
06/30/1977Inactive224683
08/31/1977Inactive224883

These ratings, calculated for Ryc, Ivo, 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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