World Diplomacy Database

The World Diplomacy Database


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Dip Pouch Tournament Rating
AuthorMatt Shields Last Update2019-10-09
International ranking National ranking
List of included tournaments List of included circuits

Each player begins with an initial rating of 40 before their first tournament. After each event, a player's final placement (e.g. 1st, 2nd, 3rd, etc.) is converted to a percentile score.

The formula used is: (([Number of Players in the event]+0.5-[Placement])/[Number of Players in the event])*100

If the event was the World Championship, the tournament value is 20.
Otherwise, if the tournament has only one round, the tournament value is equal to the number of players in the event divided by 7, plus 2. If the event has more than one round, the tournament value is equal to the number of players in the event divided by 3.5, plus two. ( (#players/3.5)+2 ). However, the maximum tournament value for any non-world championship event is 15.

Events before 2001, with the exception of World Championships, have a tournament value of zero, meaning they have no effect on ratings. The theory is that results be based only on the last ten years of competitive play.

As an example of calculating new ratings, suppose a player enters an event with a rating of 55. Suppose also that they finish in 8th place out of 65 players. The player's percentile score is (65 + 0.5 - 8)/65 * 100 = 88.46. A 65 player event would have a tournament value of (65/3.5) +2 = 20.57. However, since the maximum tournament value is 15, that will be the value for this event. Therefore, this player's rating will move 15% of the distance from 55 to 88.46. The difference between 88.46 and 55 is 33.46. 15% of 33.46 is 5.019. Therefore, we add 5.019 points to this player's rating as a results of this event, meaning their rating increases from 55 to 60.019.

Tempest in a Teapot XVI 2014
Date October 10-12, 2014 Place Rosslyn
Number of players28 Number of rounds3 Number of boards10
Coeff 110.00 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Andy BARTALONE98.21
2Chris MARTIN94.64
3Joe WHEELER91.07
4Brian SHELDEN87.50
5Robert ROUSSE83.93
6Robert CANTELMO80.36
8Rick DESPER73.21
9Peter YEARGIN69.64
10David MALETSKY66.07
11Jason MASTBAUM62.50
12Jeff LADD58.93
13Andrew BICKEL55.36
15Brian LEE48.21
16Donald WOODRING44.64
17Eric GRINNELL41.07
18Noam BROWN37.50
19Benjamin SWEEZY33.93
20Chris ADAMS30.36
21Phillip TURNER26.79
22Brent WADDINGTON23.21
23Keith TURNER19.64
24David JOHNSON16.07
25Dan TURNER12.50
26Eric FRIES8.93
26Mike RYAN8.93
26Lori WHEELER8.93

The North American Diplomacy Association The European Diplomacy Association The Diplomacy Association of Australia and New Zealand