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 XVII 2015
Date October 10-11, 2015 Place Silver Spring
Number of players39 Number of rounds3 Number of boards14
Coeff 113.14 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Chris BARFIELD98.72
2Robert CANTELMO96.15
3Rick DESPER93.59
4Joe WHEELER91.03
5Jeff LADD88.46
6Robert ROUSSE85.90
7Donald WOODRING83.33
8Doug MOORE80.77
9John BARRINGER78.21
10Robert PREMUS75.64
11Eric GRINNELL73.08
12Emily POLLOCK70.51
13Mike YOUNG67.95
14Tyler MOLLENKOPF65.38
15Peter YEARGIN62.82
16David HOOD60.26
17Graham WOODRING57.69
18Mary WITTIG55.13
19Jim YERKEY52.56
20David MALETSKY50.00
21Ike PORTER47.44
22Brian ECTON44.87
23Tony BILZI42.31
24Ben MELENSON39.74
25Andy BARTALONE37.18
26Jason O'DONNELL34.62
27Chris MARTIN32.05
28Nicholas DELATEUR29.49
29Win KELLER26.92
30Dan POLLOCK24.36
31Dan BURGESS21.79
32Andrew BICKEL19.23
33Ron HONE16.67
35Scott SHORTER11.54
36Brian LEE8.97
37Brent WADDINGTON6.41
38Vanessa MALLORY3.85
38Alex MASLOW3.85

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