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.

HuskyCon 2008
Date August 1-3, 2008 Place Long Island
Number of players38 Number of rounds3 Number of boards14
Coeff 112.86 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Brian ECTON98.68
2Adam SIGAL96.05
3Peter MCNAMARA93.42
4Jim O'KELLEY90.79
5Joe WHEELER88.16
7Christian PEDONE82.89
8Seth VAUGHN80.26
9Lori WHEELER77.63
10Thomas HAVER75.00
11Melissa CALL (nee NICHOLSON)72.37
12Jonathan HILL69.74
13Adam SILVERMAN67.11
14Andy BARTALONE64.47
15Laurent JOLY61.84
16Eric GRINNELL59.21
17David MALETSKY56.58
18Carl ELLIS53.95
19Alex AMANN51.32
20Andrew CASSESE48.68
21Susan ADELIZZI46.05
22Edward PREM43.42
23Andrew KLOCK40.79
25Jeremy EHRLICH35.53
26Conrad WOODRING32.89
27Jim YERKEY30.26
28Donald WOODRING27.63
29Anthony LIDDLE25.00
30Eric HUNTER22.37
31Evan ELLIS19.74
32Colin DAVIS17.11
34Hugh BECKETT11.84
35Ian HUNTER9.21
36Robert ROUSSE6.58
37Ben TEIXEIRA3.95
38Manny ANTUNES1.32

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