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.

CODCon Open 2007
Date April 14-15, 2007 Place Glen Ellyn
Number of players30 Number of rounds3 Number of boards9
Coeff 110.57 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Mike FRENCH98.33
2Andrew BARTLEIN95.00
3Bert SCHOOSE91.67
4Erica ALEMDAR88.33
5Matt SUNDSTROM85.00
6Nick ROHN81.67
7Paul WINDSOR78.33
8Thatcher HALLOCK75.00
9Thom COMSTOCK71.67
10Greg DUENOW68.33
11James BARR65.00
12Bill SMALL61.67
13Jim COLLINS58.33
14Eric BROWN55.00
15Jeremiah PETERSON51.67
16Paul PIGNOTTI48.33
17Christian KLINE45.00
18Grant SMITH41.67
19Laurent JOLY38.33
20Mike SULLIVAN35.00
21Brett SMITH31.67
22Cooper HEINZ28.33
23Dan BURGESS25.00
24Alex WYLER21.67
25Blake WARD18.33
26John FRANGIAS15.00
27Vincente CHONG11.67
27Alex KING11.67
29Kory MULCAHEY5.00

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