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.

DipCon 46 2013
Tempest in a Teapot XV
Date October 11-13, 2013 Place Rosslyn, VA
Number of players33 Number of rounds? Number of boards?
Coeff 111.43 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Nathan COCKERILL98.48
2Steve EMMERT95.45
3Chris MARTIN92.42
4Peter YEARGIN89.39
6Jason MASTBAUM83.33
7Joe WHEELER80.30
8David MALETSKY77.27
9Robert ROUSSE74.24
10Graham WOODRING71.21
11Melinda HOLLEY68.18
12Andy BARTALONE65.15
13Rick DESPER62.12
14Steve COOLEY59.09
15Michael BINDER56.06
16Mike HALL53.03
17Edi BIRSAN50.00
18Bill LAFOSSE46.97
19Ben MELENSON43.94
20Sachin SINGHAL40.91
21Roland COOKE37.88
22Jim O'KELLEY34.85
23Brent WADDINGTON31.82
24Steve WILCOX28.79
25Larry PEERY25.76
26Jeff LADD22.73
27Jim YERKEY19.70
28Brian LEE16.67
28Brian PALLADINO16.67
28Adam SIGAL16.67
31David JOHNSON7.58
32Kevin O'KELLEY4.55
33Christian PEDONE1.52

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