World Diplomacy Database

The World Diplomacy Database


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WDD Battle Ranking System Scoring System Event's report Statistics

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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.

Dip in the Ocean 2004
Date August 27, 2004 Place Vancouver
Number of players24 Number of rounds3 Number of boards9
Coeff 18.86 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Edi BIRSAN97.92
2Jerry FEST93.75
3Chris BRAND89.58
4Jeff DWORNICKI85.42
5Nathan BARNES81.25
6Eric MEAD77.08
7Clint HALL72.92
8Doug SCOTT68.75
9Robert O'CONNOR64.58
9Matt SHIELDS64.58
11Brad BASDEN56.25
12Buz EDDY52.08
13Mike HALL47.92
14Riaz VIRANI43.75
15Benjamin CHENG39.58
16Gary WAINES35.42
16Mark ZOFFEL35.42
18Brenden HUANG27.08
18Len TENNANT27.08
20Ryan BLANEY18.75
21Mark DORNIAN14.58
22Doug BRAY10.42
22Andrew NICK10.42
22Mitchell WAGELER10.42

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