Back to names list

Career ratings for: Matkowski, Wiktor

  Date of rating  

World Rank Rating +/- Age
03/31/1968#338233169
06/30/1968#336233369
09/30/1968#348232869
12/31/1968#343233369
03/31/1969#323235466
06/30/1969#318235966
09/30/1969#325235666
12/31/1969#315236266
02/28/1970#335236066
04/30/1970#323235275
06/30/1970#318235475
08/31/1970#321235675
10/31/1970#328235575
12/31/1970#324235975
02/28/1971#333235475
04/30/1971Inactive234786
06/30/1971Inactive235186
08/31/1971Inactive235186
10/31/1971Inactive235086
12/31/1971Inactive235186
02/29/1972Inactive235686
02/29/1976Inactive235582
04/30/1976Inactive235283
06/30/1976Inactive235783
08/31/1976Inactive235983
10/31/1976Inactive235883
12/31/1976Inactive236583

These ratings, calculated for Matkowski, Wiktor, 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.

Back to top

Home