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Career ratings for: De Lange, Daan

  Date of rating  

World Rank Rating +/- Age
12/31/1960#257228673
03/31/1961#319228873
06/30/1961#309229173
09/30/1961#313228873
12/31/1961Inactive228283
03/31/1962Inactive228083
06/30/1962Inactive228283
09/30/1962Inactive228183
12/31/1966#428223670
03/31/1967#448223970
06/30/1967#448224270
09/30/1967#444224370
12/31/1967Inactive222780
03/31/1968Inactive223180
06/30/1968Inactive223480
09/30/1968Inactive223180
03/31/1969#489223873
06/30/1969#479224473
09/30/1969#478224473
12/31/1969Inactive223676
02/28/1970Inactive223376
04/30/1970Inactive223684
06/30/1970Inactive223984
08/31/1970Inactive224184
10/31/1970Inactive223779
12/31/1970Inactive222681
02/28/1971Inactive222281
04/30/1971Inactive222486
06/30/1971Inactive222886
08/31/1971Inactive222986
08/31/1982#689227875
09/30/1982#692227575
10/31/1982#721228075
11/30/1982#720228175
12/31/1982#720227975
01/31/1983#591233470
02/28/1983#488237368
03/31/1983#498237369
04/30/1983#628232168
05/31/1983#635232068
06/30/1983#582234169
07/31/1983#594234069
08/31/1983#603233671
09/30/1983#622233971
10/31/1983#614233871
11/30/1983#619233971
12/31/1983#622233471
01/31/1984Inactive232980
02/29/1984Inactive236678
03/31/1984Inactive236878
04/30/1984Inactive231577
05/31/1984Inactive231777
06/30/1984Inactive233779
07/31/1984Inactive233779
08/31/1984Inactive233581
09/30/1984Inactive233581
10/31/1984Inactive233781
11/30/1984Inactive233681
12/31/1984Inactive233481
02/28/1985Inactive236889
03/31/1985Inactive236789
04/30/1985Inactive231288
05/31/1985Inactive231188
02/28/1986Inactive234889
03/31/1986Inactive235089
04/30/1986Inactive229689
05/31/1986Inactive229789

These ratings, calculated for De Lange, Daan, 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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