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.

BADAss Whipping 2009
Date April 17-19, 2009 Place San Francisco
Number of players28 Number of rounds4 Number of boards12
Coeff 110.00 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Nathan BARNES98.21
2Condy CREEK94.64
3Andy HULL91.07
4Brian JOHNSON87.50
5Chris BRAND83.93
6Manus HAND80.36
7Joshua SHANK76.79
8Edi BIRSAN73.21
9Tom HILTON69.64
10Nick BENDLER66.07
11Matt SHIELDS62.50
12Laurent JOLY58.93
13Louis ABRONSON55.36
14Don WILLIAMS51.79
15Matthew ELSTEIN48.21
15Siobhan NOLEN48.21
17Darin LEVILOFF41.07
18Carl NELSON37.50
19Eric TILLBERG33.93
20Mike DRUSKIN30.36
21Mike HOLY26.79
22Eric LINDBERG23.21
23Jordan ABRONSON19.64
24David LAGERSON16.07
25Chris YOUNG12.50
26Don DEL GRANDE8.93
27Tim JULIAN5.36

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