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.

Weasel Moot VII 2013
Date June 22-23, 2013 Place Willowbrook
Number of players35 Number of rounds3 Number of boards13
Coeff 112.00 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Chris MARTIN98.57
2Jarred POTTER95.71
3Graham WOODRING92.86
4Chris GLASSBURN90.00
5Edi BIRSAN87.14
6Paul PIGNOTTI84.29
7Andy BARTALONE81.43
8Jim O'KELLEY78.57
9Don GLASS75.71
10Marc PETERS72.86
11Ben DIPAOLA70.00
12Matt SUNDSTROM67.14
13Eric GRINNELL64.29
14Melinda HOLLEY61.43
15Roland COOKE58.57
17Kevin O'KELLY52.86
18Christian KLINE50.00
19Zander FRANKLIN47.14
20Ulysses PETERSON44.29
21Nick ROHN41.43
22Andy LISCHETT38.57
23Ray SETZER35.71
24Danny GRINNELL32.86
25Grant SMITH30.00
26Zac MOSLEY27.14
26Paul WINDSOR27.14
28Nathan COCKERILL21.43
29James EDWARDS18.57
30Alex MERCER15.71
31Tyler MOLLENKOPF12.86
32Amanda BAUMGARTNER10.00
32Kevin O'KELLEY10.00
32Jason RAYNOVICH10.00

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