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.

DragonFlight 2002
Date August 23-25, 2002 Place Seattle
Number of players34 Number of rounds4 Number of boards15
Coeff 111.71 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Edi BIRSAN98.53
2Ken LEMERE95.59
3Nathan BARNES92.65
4Jeff DWORNICKI89.71
5Jerry FEST86.76
6Charles SEATON83.82
7Mary KUHNER80.88
8Jake MANNIX77.94
9Adam SILVERMAN75.00
10Edward HAWTHORNE72.06
11Jack WELLS69.12
12Eric MEAD66.18
13Dennis MURRAY63.24
14Brad ROSMAN60.29
15Chris MARTIN57.35
16Andy BARTALONE54.41
17Matt SHIELDS51.47
18Manus HAND48.53
19Matt DOWNER45.59
20Jay JENSEN42.65
21Steve MAURICH39.71
22Chris CRAMER36.76
23John ALLEY33.82
24Kevin KACMARYNSKI30.88
25Eric WHITE27.94
26Dave BLANCHARD25.00
27Eric YARNELL22.06
28Mike WAGNER19.12
29Kate ADAMS16.18
30Trindon WILKERSON13.24
31Ben FERGUSON10.29
32Joe LOTT7.35
33Robert FAUTENBERRY4.41
34Chet LAMB1.47

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