World Diplomacy Database

The World Diplomacy Database


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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.

DragonFlight 2004
Date October 8-10, 2004 Place Seattle
Number of players38 Number of rounds3 Number of boards15
Coeff 112.86 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Jerry FEST98.68
2Jake MANNIX96.05
3Doug SCOTT93.42
4Robert O'CONNOR90.79
5Chris BRAND88.16
6Eric MEAD85.53
7Mark ZOFFEL82.89
8Riaz VIRANI80.26
9Edi BIRSAN77.63
10Matt SHIELDS75.00
11Andrew NEUMANN72.37
12Simon MATTHEWS69.74
13Mike HALL67.11
14Benjamin CHENG64.47
15Steve MAURICH61.84
16Nathan BARNES59.21
17Alan JENN56.58
18Brad BASDEN53.95
19David MALETSKY51.32
20Racan SOUIEDAN48.68
21Dennis MURRAY46.05
22Bruce KNIGHT43.42
23Ken LEMERE40.79
24Stephen WEINGARTEN38.16
25Eric YARNELL35.53
26Michael O'NEILL32.89
27Mike SNIVELY30.26
28Mary KUHNER27.63
29Len TENNANT25.00
30Jonathan KEITH22.37
31Adam SILVERMAN19.74
32Steve GRAHAM17.11
33Marc MALONE14.47
34Tim HARRISON11.84
35Mike NOBLE9.21
36Derek HARMON6.58
37Scott KERCHER3.95
38Buz EDDY1.32

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