World Diplomacy Database

The World Diplomacy Database


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WDD Battle Ranking System Scoring System Event's report Statistics

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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.

Weasel Moot IX 2015
Date June 13-14, 2015 Place Chicago
Number of players29 Number of rounds3 Number of boards9
Coeff 110.29 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Peter MCNAMARA98.28
2Christian KLINE94.83
3Jorge ZHANG91.38
4Brian BECK87.93
5Kevin O'KELLY84.48
6Eric GRINNELL81.03
8Peter LOKKEN74.14
9Chris KELLY70.69
9Paul PIGNOTTI70.69
11Robert ROUSSE63.79
12Jim O'KELLEY60.34
13Shawn MCDUFFEE56.90
14Don GLASS53.45
15Amanda BAUMGARTNER50.00
16Chris GLASSBURN46.55
17Matt SUNDSTROM43.10
18Josh HEFFERNAN39.66
19John GRAMILA36.21
20Fred TOWNSEND32.76
21Aash ANAND29.31
21Kevin O'KELLEY29.31
23Nelson FLYNN22.41
24Ali ADIB18.97
24Korey ENRIGHT18.97
24Jake LANGENFELD18.97
24Ray SETZER18.97

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