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 XVIII 2016
Date October 7-9, 2016 Place Silver Spring
Number of players42 Number of rounds3 Number of boards14
Coeff 114.00 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Jeff LADD98.81
2Andy BARTALONE96.43
3David MALETSKY94.05
4Joe WHEELER91.67
5Siobhan NOLEN89.29
6Nicholas DELATEUR86.90
7Chris MARTIN84.52
8Jay HEUMANN82.14
9Brian SHELDEN79.76
10Eric WARNKE77.38
11David MILLER75.00
12Bryan PRAVEL72.62
13Brandon FOGEL70.24
14Chris BARFIELD67.86
15Jake TROTTA65.48
16Jason MASTBAUM63.10
17Matthew JOHNSON60.71
18Ben WOLFRAM58.33
19Andrew KATCHER55.95
20Emily POLLOCK53.57
21Robert ROUSSE51.19
22Carlos TREVINO48.81
23Bruce RAY46.43
24Roy RINK44.05
25Christian PEDONE41.67
26Dan POLLOCK39.29
27Fred OLOWIN36.90
29Florence WALSTON32.14
30Jim YERKEY29.76
31Ron HONE27.38
32Rick DESPER10.71
33Steve EMMERT22.62
35Brian LEE17.86
36Ike PORTER15.48
37Adam SIGAL13.10
38Rick DESPER10.71
39Brian ECTON8.33
40David JOHNSON5.95
41Michael JOHNSON3.57

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