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Career ratings for: Costa, Fernando JM

  Date of rating  

World Rank Rating +/- Age
01/31/1995#3409218575
02/28/1995#3409218475
03/31/1995#3444218475
04/30/1995#3482218175
05/31/1995#3496218275
06/30/1995#3462218675
07/31/1995#3435219175
08/31/1995#3470219275
09/30/1995#3515219275
10/31/1995#3464219775
11/30/1995#3425220075
12/31/1995#3445220075
01/31/1996#3816218171
02/29/1996#3843218171
03/31/1996#3844218171
04/30/1996#3861217771
05/31/1996#3843217871
06/30/1996#3836217871
07/31/1996#3531220767
08/31/1996#3567220867
09/30/1996#3611220667
10/31/1996#3572221067
11/30/1996#3679220265
12/31/1996#3715220365
01/31/1997#3928218465
02/28/1997#3932218565
03/31/1997#3982218465
04/30/1997#4015218165
05/31/1997#4031218165
06/30/1997#4005218365
07/31/1997#4003218566
08/31/1997#4020218566
09/30/1997#4022218466
10/31/1997#4069218566
11/30/1997#4077218466
12/31/1997#4118218366
01/31/1998#4073217573
02/28/1998#4087217573
03/31/1998#4103217673
04/30/1998#4142217673
05/31/1998#4152217571
06/30/1998#4174217671
07/31/1998#4170217773
08/31/1998#4141218168
09/30/1998#4138218368
10/31/1998#4167218568
11/30/1998#4091219162
12/31/1998#4908213560
01/11/1999#4585213660
01/18/1999#4594213660
01/25/1999#4608213660
02/01/1999#3945213161
02/08/1999#3952213161
02/15/1999#3974213161
02/22/1999#3995213261
03/01/1999#3997212961
03/08/1999#4007213161
03/15/1999#4010213061
03/22/1999#4000213261
03/29/1999#4009213261
04/05/1999#3988213461
04/12/1999#4004213461
04/19/1999#4012213561
04/26/1999#4033213461
05/03/1999#4035213361
05/10/1999#4040213361
05/17/1999#4053213361
05/24/1999#4084213161
05/31/1999#4103213161
06/07/1999#3995214461
06/14/1999#4001214461
06/21/1999#4013214461
06/28/1999#4017214561
07/05/1999#3996214661
07/12/1999#3997214761
07/19/1999#4003214861
07/26/1999#4037214861
08/02/1999#3964215261
08/09/1999#3974215361
08/16/1999#4011215061
08/23/1999#4023215261
08/30/1999#4041215061
09/06/1999#4122213161
09/13/1999#4146213061
09/20/1999#4158213161
09/27/1999#4177213161
10/04/1999#4078213161
10/11/1999#4100213161
10/18/1999#4147213161
10/25/1999#4165213161
11/01/1999#3990213461
11/08/1999#4003213461
11/15/1999#4024213461
11/22/1999#4049213461
11/29/1999#4080213461
12/06/1999#4114211663
12/13/1999#4126211763
12/20/1999#4136211663
12/27/1999#4155211663
01/03/2000#4009214167
01/10/2000#4025214267
01/17/2000#4040214367
01/24/2000#4053214367
01/31/2000#4055214467
02/07/2000#3658213969
02/14/2000#3660213969
02/21/2000#3683214069
02/28/2000#3687214169
03/06/2000#3667214069
03/13/2000#3695213969
03/20/2000#3700213969
03/27/2000#3710213869
04/03/2000#3727213669
04/10/2000#3706213669
04/17/2000#3727213669
04/24/2000#3748213569
05/01/2000#3749213669
05/08/2000#3759213369
05/15/2000#3768213569
05/22/2000#3779213369
05/29/2000#3781213469
06/05/2000#3791213369
06/12/2000#3700214769
06/19/2000#3736214869
06/26/2000#3737214769
07/03/2000#3753214869
07/10/2000#3732214869
07/17/2000#3743214969
07/24/2000#3762214969
07/31/2000#3783214969
08/07/2000#3739215169
08/14/2000#3750215269
08/21/2000#3775215169
08/28/2000#3772215269
09/04/2000#3793215269
09/11/2000#3905213368
09/18/2000#3901213368
09/25/2000#3903213368
10/02/2000#3907213268
10/09/2000#3855213268
10/16/2000#3874213068
10/23/2000#3908213068
10/30/2000#3924212968
11/06/2000#3802213368
11/13/2000#3829213268
11/20/2000#3894213568
11/27/2000#3892213568
12/04/2000#3896213768
12/11/2000#3943212071
12/18/2000#3961212271
12/25/2000#3961212271
01/01/2001#3978212371
01/08/2001Inactive214677
01/15/2001Inactive214777
01/22/2001Inactive214777
01/29/2001Inactive214877
02/05/2001Inactive214877
02/12/2001Inactive214379
02/19/2001Inactive214379
02/26/2001Inactive214279
03/05/2001Inactive214279
03/12/2001Inactive214179
03/19/2001Inactive214079
03/26/2001Inactive214079
04/02/2001Inactive214079
04/09/2001Inactive213979
04/16/2001Inactive213979
04/23/2001Inactive213879
04/30/2001Inactive213879
05/07/2001Inactive213779
05/14/2001Inactive213679
05/21/2001Inactive213579
05/28/2001Inactive213479
06/04/2001Inactive213479
06/11/2001Inactive213679
06/18/2001Inactive215178
06/25/2001Inactive215178
07/02/2001Inactive215178
07/09/2001Inactive215178
07/16/2001Inactive215278
07/23/2001Inactive215178
07/30/2001Inactive215178
08/06/2001Inactive215278
08/13/2001Inactive215579
08/20/2001Inactive215579
08/27/2001Inactive215579
09/03/2001Inactive215679
09/10/2001Inactive215679

These ratings, calculated for Costa, Fernando JM, 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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