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Career ratings for: Arbouche, Muhamed

  Date of rating  

World Rank Rating +/- Age
07/31/1993#2715218973
08/31/1993#3018214369
09/30/1993#3045214469
10/31/1993#3091214269
11/30/1993#3116214369
12/31/1993#3132214369
01/31/1994#2850221067
02/28/1994#2903220967
03/31/1994#2916220767
04/30/1994#2901221067
05/31/1994#2910221267
06/30/1994#3276216367
07/31/1994#3141218773
08/31/1994#3436214773
09/30/1994#3468214473
10/31/1994#3471214373
11/30/1994#3551214673
12/31/1994#3497215871
01/31/1995#3013222174
02/28/1995#3025221974
03/31/1995#3041221974
04/30/1995#3024222274
05/31/1995#3039222374
06/30/1995#3588217473
07/31/1995Inactive220179
08/31/1995Inactive213983
09/30/1995Inactive214183
10/31/1995Inactive214083
11/30/1995Inactive213983
12/31/1995Inactive215181
01/31/1996Inactive222184
02/29/1996Inactive221984
03/31/1996Inactive221984
04/30/1996Inactive222184
05/31/1996Inactive222184
06/30/1996Inactive217184
09/30/1996Inactive215277
10/31/1996Inactive214877
11/30/1996Inactive214877
12/31/1996Inactive216076
01/31/1997Inactive220877
02/28/1997Inactive220877
03/31/1997Inactive220977
04/30/1997Inactive221277
05/31/1997Inactive221177
06/30/1997Inactive216877
07/31/1997Inactive218879
08/31/1997Inactive214780
09/30/1997Inactive214388
10/31/1997Inactive214288
11/30/1997Inactive214288
12/31/1997Inactive215287
01/31/1998Inactive219888
02/28/1998Inactive219888
03/31/1998Inactive220288
04/30/1998Inactive220688
05/31/1998Inactive220688
06/30/1998Inactive216188

These ratings, calculated for Arbouche, Muhamed, 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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