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Career ratings for: Blodstein, Boris

  Date of rating  

World Rank Rating +/- Age
10/31/1995Inactive221583
11/30/1995Inactive222083
12/31/1995Inactive221084
01/31/1996Inactive221480
02/29/1996Inactive221680
03/31/1996Inactive221580
04/30/1996Inactive221980
05/31/1996Inactive222080
06/30/1996Inactive221580
07/31/1996Inactive222179
08/31/1996Inactive222379
09/30/1996Inactive222179
10/31/1996Inactive219177
11/30/1996Inactive219477
12/31/1996Inactive219077
03/31/1997Inactive216376
04/30/1997Inactive216676
05/31/1997Inactive216476
06/30/1997Inactive216276
07/31/1997Inactive221375
08/31/1997Inactive221375
09/30/1997Inactive221175
10/31/1997#4085218475
11/30/1997#4060218575
12/31/1997#4155218175
01/31/1998Inactive215679
02/28/1998Inactive216079
03/31/1998Inactive215586
04/30/1998Inactive216086
05/31/1998Inactive215986
06/30/1998Inactive215686
07/31/1998Inactive220786
08/31/1998Inactive220686
09/30/1998Inactive220486
10/31/1998Inactive217685
11/30/1998Inactive217780
12/31/1998Inactive217380
01/11/1999Inactive217380
01/18/1999Inactive217380
01/25/1999Inactive217480
02/01/1999Inactive215083
02/08/1999Inactive215083
02/15/1999Inactive215083
02/22/1999Inactive215083
03/01/1999Inactive215283
03/08/1999Inactive215383
03/15/1999Inactive215383
03/22/1999Inactive215483
03/29/1999Inactive215483
04/05/1999Inactive215088
04/12/1999Inactive215088
04/19/1999Inactive215088
04/26/1999Inactive215088
05/03/1999Inactive215488
05/10/1999Inactive215388
05/17/1999Inactive215388
05/24/1999Inactive215288
05/31/1999Inactive215288

These ratings, calculated for Blodstein, Boris, 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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