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.

ManorCon 23 2005
Date July 15-17, 2005 Place Birmingham
Number of players40 Number of rounds3 Number of boards12
Coeff 113.43 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1John STRATFORD98.75
2Yann CLOUET96.25
3Douglas MASSIE93.75
4Vick HALL91.25
5Arnaud DAINA88.75
6Geoff KEMP86.25
7Toby HARRIS83.75
8Mark WIGHTMAN81.25
9Ivan WOODWARD78.75
10Rick DESPER76.25
11Richard WILLIAMS73.75
12Millis MILLER71.25
13Simon HORNBY68.75
14Keith SMITH66.25
15John COLLEDGE63.75
16Andrew GRECO61.25
17Dan LESTER58.75
18Brian FREW56.25
19Phil WILLIAMS53.75
20Robin WALTERS51.25
21David NORMAN48.75
22Jeremy TULLETT46.25
23David PERCIK43.75
24Nigel PEPPER41.25
25Chetan RADIA38.75
26Nick PARISH36.25
27Andrew HARTLEY33.75
28Dave WREATHALL31.25
29Neil DUNCAN28.75
31Eve SMITH23.75
32Steve AGG21.25
33David BUCKLEY18.75
34Mark HANCOCK16.25
35Christopher GLEDHILL13.75
36Danny COLLMAN11.25
37Rob KEMP8.75
39Shaun DERRICK3.75
40Richard TURNER1.25

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