World Diplomacy Database

The World Diplomacy Database


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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.

Tempest in a teapot XII 2010
Date October 15-17, 2010 Place Falls Church
Number of players30 Number of rounds3 Number of boards10
Coeff 110.57 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Andy BARTALONE98.33
3Thomas HAVER91.67
4Bruce RAY88.33
5Brian LEE85.00
6Richard MALTZ81.67
7Seth VAUGHN78.33
8Chris MARTIN75.00
9Peter YEARGIN71.67
10Brian SHELDEN68.33
11Jeff LADD65.00
12Andrew JAMESON61.67
13John BARRINGER58.33
14Steve COOLEY55.00
15Rich O'BRIEN51.67
16Brian ECTON48.33
17David JOHNSON45.00
18Kai HSIEH41.67
19Robert ROUSSE38.33
20Steve EMMERT35.00
21Heath GORDON31.67
22Jonathan LEWY28.33
23Joe WHEELER25.00
24Mike HALL21.67
25Chris BARFIELD18.33
26Rick DESPER15.00
26Stephen MAURIS15.00
26Brent WADDINGTON15.00
29William ABBOTT5.00
30David BOOTH1.67

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