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.

Dixie 19 2005
Date May 27, 2005 Place Chapel Hill
Number of players32 Number of rounds3 Number of boards11
Coeff 111.14 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Brian ECTON98.44
2Doug MOORE95.31
3David MALETSKY92.19
4Chris MARTIN89.06
5Roy RINK85.94
7Lori WHEELER79.69
8Corey MASON76.56
9Andy BARTALONE73.44
10Tony VILA70.31
11Chris BARFIELD67.19
12Jacob ADDELSON64.06
13Joe WHEELER60.94
14Jeff LADD57.81
15Travis MCTIGHE54.69
16Rick DESPER51.56
17Todd CRAIG48.44
18Tom KOBRIN45.31
19Vahid SANII42.19
20Jay HEUMANN39.06
21Tyler MOLLENKOPF35.94
22Austin PARKER32.81
23Brian LEE29.69
24Adam MELDROM26.56
25Daniel KOLBAS23.44
26George, Jr. GREENE20.31
26Jim HACKER20.31
28Graham WOODRING14.06
29Kevin BROWN10.94
29Steve KOEHLER10.94
29Justin THOMPSON10.94
29Richard WEISS10.94

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