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Career ratings for: Aguirre Izaguirre, Pedro Jose

  Date of rating  

World Rank Rating +/- Age
12/31/1947#123219875
12/31/1948Inactive218586
01/31/1993#2044227675
02/28/1993#2046227575
03/31/1993#2039227575
04/30/1993#2107227175
05/31/1993#2133226875
06/30/1993#2082227275
07/31/1993#2074227375
08/31/1993#2089227575
09/30/1993#2095227575
10/31/1993#2158227275
11/30/1993#2178227275
12/31/1993#2203227175
01/31/1994Inactive226985
02/28/1994Inactive226885
03/31/1994Inactive226785
04/30/1994Inactive224680
05/31/1994Inactive224980
06/30/1994Inactive225180
07/31/1994Inactive225480
08/31/1994Inactive225580
09/30/1994Inactive225480
10/31/1994Inactive224980
11/30/1994Inactive225180
12/31/1994Inactive224980
01/31/1995Inactive224787
02/28/1995Inactive224787
03/31/1995Inactive224787
07/31/1996Inactive224575
08/31/1996Inactive224775
09/30/1996Inactive224775
10/31/1996Inactive224575
11/30/1996Inactive224475
12/31/1996Inactive224575
01/31/1997Inactive224476
02/28/1997Inactive224476
03/31/1997Inactive224476
04/30/1997Inactive223777
05/31/1997Inactive223577
06/30/1997Inactive223877
07/31/1997Inactive223986
08/31/1997Inactive224186
09/30/1997Inactive223986
10/31/1997Inactive223886
11/30/1997Inactive223686
12/31/1997Inactive223686
01/31/1998Inactive223387
02/28/1998Inactive223487
03/31/1998Inactive223787
04/30/1998Inactive223188
05/31/1998Inactive223188
06/30/1998Inactive223288

These ratings, calculated for Aguirre Izaguirre, Pedro Jose, 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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