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.

Massacre 2013
Date July 5-7, 2013 Place Philadelphia
Number of players26 Number of rounds3 Number of boards9
Coeff 19.43 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Adam SIGAL98.08
2Graham WOODRING94.23
3Peter YEARGIN90.38
4Michael BINDER86.54
5David JOHNSON82.69
6Robert ROUSSE78.85
7Andrew CASSESE75.00
8Robert PREMUS71.15
9Joel CULBREATH67.31
9Brian ECTON67.31
11Jason MASTBAUM59.62
12Marcos LOMELI55.77
13Angelo DELLOMARGIO51.92
14Rick DESPER48.08
15Brent WADDINGTON44.23
16Klint KANOPKA40.38
17Ry4an BRASE36.54
18Karl KROSNIK32.69
19Carl ELLIS28.85
20David MALETSKY25.00
21Sam THOMAS21.15
22Emmanuel CRUZ17.31
23Tuong LAM13.46
24Paul CAMINA9.62
25James COPELAND5.77
25Clark GOLDENTYER5.77

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