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Career ratings for: Estrada Degrandi, Walter

  Date of rating  

World Rank Rating +/- Age
06/30/1954#187230665
12/31/1954#194230265
06/30/1955#219230374
12/31/1955#198229774
06/30/1956Inactive229384
12/31/1956Inactive228884
06/30/1958#240226371
12/31/1958#256225971
06/30/1959Inactive225481
12/31/1959Inactive225281
03/31/1960#279229961
06/30/1960#225230462
09/30/1960#225230462
12/31/1960#247230162
03/31/1961#325228059
06/30/1961#321227459
09/30/1961#324227259
12/31/1961#293228559
03/31/1962#336225363
06/30/1962#332224262
09/30/1962#358222059
12/31/1962#352223560
03/31/1963#366222961
06/30/1963#377221761
09/30/1963#353222962
12/31/1963#341224063
03/31/1964#377222662
06/30/1964#383221862
09/30/1964#365222762
12/31/1964#386223763
03/31/1965#422223869
06/30/1965#432222970
09/30/1965#421223870
12/31/1965#386224771
03/31/1966Inactive223979
06/30/1966Inactive222979
09/30/1966Inactive224180
12/31/1966Inactive224781
03/31/1968#452223166
06/30/1968#470222566
09/30/1968#476222966
12/31/1968#475223766
03/31/1969Inactive223475
06/30/1969Inactive223175
09/30/1969Inactive223675
12/31/1969Inactive224575
02/28/1970Inactive224375
04/30/1970Inactive224186
06/30/1970Inactive223386
08/31/1970Inactive223586
10/31/1970Inactive224386
12/31/1970Inactive224886
02/28/1971#529221372
04/30/1971#474220375
06/30/1971#490219875
08/31/1971#509219875
10/31/1971#462220475
12/31/1971#459220875
02/29/1972Inactive222282
04/30/1972Inactive221285
06/30/1972Inactive220785
08/31/1972Inactive220885
10/31/1972Inactive221185
12/31/1972Inactive221685
02/28/1977Inactive217777
04/30/1977Inactive219281
06/30/1977Inactive218581
08/31/1977Inactive218881
10/31/1977Inactive219081
12/31/1977Inactive219581
02/28/1978#592213969
04/30/1978#612214469
06/30/1978#638213969
08/31/1978#651214269
10/31/1978#664215167
12/31/1978#680215467
02/28/1979#674214772
04/30/1979#691215373
06/30/1979#672214873
08/31/1979#661214773
10/31/1979Inactive214976
12/31/1979Inactive215576
01/31/1980Inactive215776
02/29/1980Inactive215183
03/31/1980Inactive215183
04/30/1980Inactive215983
05/31/1980Inactive215983
06/30/1980Inactive215883
07/31/1980Inactive215983
08/31/1980Inactive215883
09/30/1980Inactive215883
10/31/1980Inactive215886
11/30/1980Inactive215886
12/31/1980Inactive215886
01/31/1981Inactive215786

These ratings, calculated for Estrada Degrandi, Walter, 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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