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.

WAC 8 2011
Date January 21-22, 2011 Place Seattle
Number of players29 Number of rounds3 Number of boards11
Coeff 110.29 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Matt SHIELDS98.28
2Chris BRAND94.83
3Zach MEISSNER91.38
3Racan SOUIEDAN91.38
5Stephen WEINGARTEN84.48
6Jay HEUMANN81.03
7Matthew BARNETT77.59
8Brad ROSMAN74.14
9John JAMIESON70.69
10Eric MEAD67.24
11Kyra OLSON63.79
12David SIELAFF60.34
13Brad BASDEN56.90
14Jonathan KEITH53.45
15Jimmy CHEN50.00
16Brian MURDOCK46.55
17Craig BIERLE43.10
17Nathan SCHLAUD43.10
19Spiros BOBETSIS36.21
20Mark WARD32.76
21Alex COLLINS29.31
22Tony SANTAFERRA25.86
23Adam BEREY22.41
24Ryan WITMER18.97
25Nigel HOOPER15.52
26Rob ZOFFEL12.07
27Karl UNKNOWN8.62

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