World Diplomacy Database

The World Diplomacy Database


Home Tournament League Circuit Player
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.

PiggyBack 2003
Date April 25, 2003 Place Portland
Number of players27 Number of rounds4 Number of boards13
Coeff 19.71 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Manus HAND98.15
2Jake MANNIX94.44
3Mary KUHNER90.74
4Michael O'NEILL87.04
5Nathan BARNES83.33
6Andy BARTALONE79.63
7Benjamin CHENG75.93
8Edward HAWTHORNE72.22
9Adam SILVERMAN68.52
10Jerry FEST64.81
11Fred SUTHERLAND61.11
12Dennis MURRAY57.41
13Brad ROSMAN53.70
14Bruce CAMERON50.00
15Jeff DWORNICKI46.30
16Wes WAGNER42.59
17Trevor DAVINE38.89
18Kevin KACMARYNSKI35.19
19Buz EDDY31.48
19Rebecca NEWMAN31.48
21Berry RENKEN24.07
22Bruce KNIGHT20.37
22Matt SHIELDS20.37
24Doug SCOTT12.96
25Bruce BAKER9.26
26Stephen WEINGARTEN5.56
27Nate SANDALL1.85

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