World Diplomacy Database

The World Diplomacy Database


Home Tournament League Circuit Player
WDD Battle Ranking System Scoring System Event's report Statistics

Other ranking system

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.

Massacre 2014
Date July 4-6, 2014 Place Philadelphia
Number of players31 Number of rounds3 Number of boards12
Coeff 110.86 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Graham WOODRING98.39
2Chris MARTIN95.16
3David MALETSKY91.94
4Michael BINDER88.71
5Donald WOODRING85.48
6Unknown LIANG82.26
7Brian ECTON79.03
8David JOHNSON75.81
9Adam SIGAL72.58
10Angelo DELLOMARGIO69.35
11Jason MASTBAUM66.13
12Tuong LAM62.90
13Robert PREMUS59.68
14Joel CULBREATH56.45
15Rick DESPER53.23
17Robert ROUSSE46.77
18Brent WADDINGTON43.55
19Andy BARTALONE40.32
20Klint KANOPKA37.10
21Unknown O'ROURKE33.87
22Andy SHINER30.65
23Carl ELLIS27.42
24Joe SIESTO24.19
25Emmanuel CRUZ20.97
26Unknown GOODALL17.74
27Unknown ROSSER14.52
28Unknown CARROLL11.29
29Unknown RATHOD8.06
30Jack MCHUGH4.84

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