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Career ratings for: Watai, Miyoko

  Date of rating  

World Rank Rating +/- Age
11/01/1999#4125210974
11/08/1999#4140210874
11/15/1999#4160210974
11/22/1999#4188210874
11/29/1999#4216210974
12/06/1999#4129211174
12/13/1999#4151211074
12/20/1999#4160210974
12/27/1999#4183210974
01/03/2000#4171210871
01/10/2000#4195210871
01/17/2000#4224210871
01/24/2000#4237210871
01/31/2000#4237210871
02/07/2000#3794210771
02/14/2000#3796210671
02/21/2000#3816210871
02/28/2000#3817210971
03/06/2000#3791210871
03/13/2000#3821210771
03/20/2000#3828210771
03/27/2000#3835210771
04/03/2000#3848210771
04/10/2000#3841210471
04/17/2000#3867210471
04/24/2000#3889210371
05/01/2000#3891210371
05/08/2000#3877210471
05/15/2000#3887210671
05/22/2000#3893210671
05/29/2000#3908210471
06/05/2000#3920210471
06/12/2000#3905210771
06/19/2000#3951210671
06/26/2000#3953210671
07/03/2000#3973210671
07/10/2000#3947210771
07/17/2000#3960210771
07/24/2000#3974210771
07/31/2000#4000210771
08/07/2000#3990210471
08/14/2000#4008210471
08/21/2000#4023210571
08/28/2000#4032210471
09/04/2000#4068210471
09/11/2000#4027210571
09/18/2000#4011210571
09/25/2000#4018210571
10/02/2000#4023210471
10/09/2000#3979210172
10/16/2000#3976210272
10/23/2000#4005210372
10/30/2000#4026210272
11/06/2000Inactive210384
11/13/2000Inactive210284
11/20/2000Inactive210184
11/27/2000Inactive210284
12/04/2000Inactive210384
12/11/2000Inactive210484
12/18/2000Inactive210584
12/25/2000Inactive210484
01/01/2001Inactive210484
01/08/2001Inactive210281
01/15/2001Inactive210281
01/22/2001Inactive210381
01/29/2001Inactive210381
02/05/2001Inactive210281
02/12/2001Inactive210281
02/19/2001Inactive210281
02/26/2001Inactive210181
03/05/2001Inactive210181
03/12/2001Inactive210281
03/19/2001Inactive210181
03/26/2001Inactive210181
04/02/2001Inactive210181
04/09/2001Inactive210181
04/16/2001Inactive209881
04/23/2001Inactive209781
04/30/2001Inactive209581
05/07/2001Inactive209881
05/14/2001Inactive210181
05/21/2001Inactive209981
05/28/2001Inactive209981
06/04/2001Inactive209981
06/11/2001Inactive209781
06/18/2001Inactive209981
06/25/2001Inactive210181
07/02/2001Inactive210181
07/09/2001Inactive210081
07/16/2001Inactive210181
07/23/2001Inactive210181
07/30/2001Inactive210181
08/06/2001Inactive210181
08/13/2001Inactive210081
08/20/2001Inactive209881
08/27/2001Inactive209881
09/03/2001Inactive209881
09/10/2001Inactive209981

These ratings, calculated for Watai, Miyoko, 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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