World Diplomacy Database

The World Diplomacy Database


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WDD Battle Ranking System Scoring System Event's report Statistics

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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.

World DipCon XXI 2011
Sydney Diplomacy Challenge
Date October 1-3, 2011 Place Sydney
Number of players34 Number of rounds5 Number of boards17
Coeff 120.00 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Andrew GOFF98.53
2Grant STEEL95.59
3Liam COSGRAVE92.65
4Peter MCNAMARA89.71
5Michael BINDER86.76
6Chris BRAND83.82
7Quentin BALL80.88
8Steve LYTTON77.94
9Paraic REDDINGTON75.00
10Thorin MUNRO72.06
11Chris BURKE69.12
12Shane CUBIS66.18
13Graham ALLEN63.24
14William BLACK60.29
15Craig PURCELL57.35
16Doug STEWART54.41
17Dan BURGESS51.47
18Melissa CALL (nee NICHOLSON)48.53
19Geoff KERR45.59
20Chad NIMMAGADDA42.65
21Gilby REHBEIN39.71
23Stuart BARTON33.82
24Matthew WOODBURN30.88
25Greg BREESE27.94
26Sean COLMAN25.00
27Robert RATTLEY22.06
28Darryl GREENSILL19.12
29Damian THORNLEY16.18
30Brendan WHYTE13.24
31Don DEL GRANDE10.29
32Casey TUCKER7.35
33Gabriel SINGER4.41

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