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Career ratings for: Hook, William

  Date of rating  

World Rank Rating +/- Age
03/31/1969#514221173
06/30/1969#507221873
09/30/1969#505221773
12/31/1969Inactive224777
02/28/1970#494226668
04/30/1970#475222571
06/30/1970#466222871
08/31/1970#472223071
10/31/1970#508222662
12/31/1970#472225264
02/28/1971#466226266
04/30/1971#455222767
06/30/1971#463223167
08/31/1971#480223167
10/31/1971#456222071
12/31/1971#438224472
02/29/1972#487227372
04/30/1972#497223973
06/30/1972#490224373
08/31/1972#493224373
10/31/1972Inactive223177
12/31/1972Inactive225678
02/28/1973Inactive226883
04/30/1973Inactive223284
06/30/1973Inactive223884
08/31/1973Inactive223784
10/31/1973Inactive222788
12/31/1973Inactive225189
06/30/1974Inactive226481
08/31/1974Inactive226481
10/31/1974Inactive225582
12/31/1974Inactive227983
02/28/1975Inactive229784
04/30/1975Inactive226685
01/31/1990Inactive219778
02/28/1990Inactive220078
03/31/1990Inactive220178
04/30/1990Inactive219478
05/31/1990Inactive219278
06/30/1990#1803219275
07/31/1990#1839219175
08/31/1990#1839219375
09/30/1990#1860219275
10/31/1990#1931216975
11/30/1990#1911219072
12/31/1990#1886220572
01/31/1991#1912221270
02/28/1991#1905222070
03/31/1991#1947222270
04/30/1991#1993220970
05/31/1991#2008221070
06/30/1991#2025220771
07/31/1991#2054220671
08/31/1991#2079220671
09/30/1991#2094220571
10/31/1991#2119220371
11/30/1991#2083220973
12/31/1991#2045222073
01/31/1992Inactive221780
02/29/1992Inactive222580
03/31/1992Inactive222780
04/30/1992Inactive220980
05/31/1992Inactive220980
06/30/1992Inactive219577
07/31/1992Inactive219677
08/31/1992Inactive219677
09/30/1992Inactive219677
10/31/1992Inactive219777
11/30/1992Inactive220178
12/31/1992Inactive221578
01/31/1993Inactive220684
02/28/1993Inactive221484
03/31/1993Inactive221584
04/30/1993Inactive220084
05/31/1993Inactive219884
06/30/1993Inactive220088
07/31/1993Inactive219788
08/31/1993Inactive219688
09/30/1993Inactive219688
10/31/1993Inactive219588
11/30/1993Inactive220289
12/31/1993Inactive221389
11/30/1994Inactive222983
12/31/1994Inactive223883
01/31/1995Inactive223285
02/28/1995Inactive223785
03/31/1995Inactive224085
04/30/1995Inactive222885
05/31/1995Inactive222185
06/30/1995Inactive219777
07/31/1995Inactive219677
08/31/1995Inactive219677
09/30/1995Inactive219877
10/31/1995#3580218674
11/30/1995Inactive220981
12/31/1995Inactive222181
01/31/1996Inactive220177
02/29/1996Inactive220677
03/31/1996Inactive220977
04/30/1996Inactive219877
05/31/1996Inactive219377
06/30/1996Inactive218882
07/31/1996Inactive218782
08/31/1996Inactive218682
09/30/1996Inactive218682
10/31/1996Inactive217479
11/30/1996Inactive219484
12/31/1996Inactive220584
01/31/1997Inactive219988
02/28/1997Inactive220588
03/31/1997Inactive220888
04/30/1997Inactive219888
05/31/1997Inactive219188
09/30/1997Inactive217485
10/31/1997Inactive216484
11/30/1997Inactive218187
12/31/1997Inactive219087
01/31/1998Inactive218189
02/28/1998Inactive218789
03/31/1998Inactive219289
04/30/1998Inactive218389
05/31/1998Inactive217989

These ratings, calculated for Hook, William, 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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