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.

Canuck Con 2006
Date October 1, 2006 Place Vancouver
Number of players19 Number of rounds4 Number of boards10
Coeff 17.43 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Micah KRABILL97.37
2David NORMAN92.11
3Matt SHIELDS86.84
4Eric MEAD81.58
5Chris BRAND76.32
6Jake MANNIX71.05
7Edi BIRSAN65.79
8Riaz VIRANI60.53
9John JAMIESON55.26
10Nathan BARNES50.00
11Mark DORNIAN44.74
12Buz EDDY39.47
13Andrew NICK34.21
14Len TENNANT28.95
15Reuben JONES23.68
16Jeff DWORNICKI18.42
18Mike HALL7.89
19Faraz ADILIPOURU2.63

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