World Diplomacy Database

The World Diplomacy Database


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WDD Battle Ranking System Scoring System Event's report Statistics

Other ranking system

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.

PrezCon 2004
Date February 27-29, 2004 Place Charlottesville
Number of players30 Number of rounds3 Number of boards9
Coeff 110.57 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Chris MARTIN98.33
2Doug MOORE95.00
3Tom KOBRIN91.67
4Andy BARTALONE88.33
4Lori WHEELER88.33
6Joe WHEELER81.67
7Brian SHELDEN78.33
8Rick DESPER75.00
9Jeff LADD71.67
10Monty CARLISLE68.33
11Sean CABLE65.00
12Christopher MANN61.67
13Bruce RAY58.33
15Adam SIGAL51.67
16Jay HEUMANN48.33
17Evan PERLMAN45.00
18Jared MARTIN41.67
19Ike PORTER38.33
20Rob COCHRAN35.00
21Lisa FOSTER31.67
21David HOOD31.67
21Karl LASKAS31.67
21Andy MARSHALL31.67
21Dan MATHIAS31.67
21Evan MEYERBERG31.67
21Rich O'BRIEN31.67
21Thomas PASKO31.67
21Bruce REIFF31.67
21Bill THOMPSON31.67

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