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Career ratings for: Goodman, David SC

  Date of rating  

World Rank Rating +/- Age
02/29/1976#282240073
04/30/1976#282240173
06/30/1976#281240573
08/31/1976#349237266
10/31/1976#346238066
12/31/1976#362237966
02/28/1977#252243571
04/30/1977#229245362
06/30/1977#239244360
08/31/1977#350239961
10/31/1977#338240361
12/31/1977#345240061
02/28/1978#260243561
04/30/1978#285242562
06/30/1978#296242766
08/31/1978#404238467
10/31/1978#383238967
12/31/1978#407238567
02/28/1979#328242067
04/30/1979#327242165
06/30/1979#323241967
08/31/1979#434237265
10/31/1979#428237865
12/31/1979#395239362
01/31/1980#467237060
02/29/1980#368239960
03/31/1980#374239960
04/30/1980#349241361
05/31/1980#352241461
06/30/1980#348241962
07/31/1980#348241962
08/31/1980#420238663
09/30/1980#424238663
10/31/1980#410239063
11/30/1980#411239063
12/31/1980#457236966
01/31/1981#465237168
02/28/1981#383239668
03/31/1981#389239568
04/30/1981#373240769
05/31/1981#371240669
06/30/1981#367241170
07/31/1981#369241070
08/31/1981#457237871
09/30/1981#457237771
10/31/1981#447238371
11/30/1981#446238471
12/31/1981#489236675
01/31/1982Inactive236577
02/28/1982#520235570
03/31/1982#521235470
04/30/1982#500236371
05/31/1982#501236271
06/30/1982#497236571
07/31/1982#502236271
08/31/1982#581233672
09/30/1982#581233372
10/31/1982#595234172
11/30/1982#596234172
12/31/1982#631232474
01/31/1983#614232472
02/28/1983Inactive236276
03/31/1983Inactive236176
04/30/1983Inactive237177
05/31/1983Inactive237077
06/30/1983Inactive237377
07/31/1983Inactive237177
08/31/1983Inactive234378
09/30/1983Inactive234578
10/31/1983Inactive234778
11/30/1983Inactive234978
12/31/1983Inactive232779
01/31/1984Inactive232682
02/29/1984Inactive236187
03/31/1984Inactive236287
04/30/1984Inactive237288
05/31/1984Inactive237488
06/30/1984Inactive237788
07/31/1984Inactive237688
08/31/1984Inactive234989
09/30/1984Inactive234989
10/31/1984Inactive235589
11/30/1984Inactive235489

These ratings, calculated for Goodman, David SC, 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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