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.

Dixie 17 2003
Date May 23, 2003 Place Chapel Hill
Number of players52 Number of rounds? Number of boards?
Coeff 115.00 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Tom KOBRIN99.04
2Chris MARTIN97.12
3Ike PORTER95.19
4Conrad WOODRING93.27
5Andy MARSHALL91.35
6Jeff DWORNICKI89.42
7Roy RINK87.50
8Lisa FOSTER85.58
9Brian ECTON83.65
10Edward HAWTHORNE81.73
11Joe WHEELER79.81
12Doug MOORE77.88
13Jeff LADD75.96
14Andy BARTALONE74.04
15Greg FAIRBANKS72.12
16Eric GRINNELL70.19
17Stephen MAURIS68.27
18Carl ELLIS66.35
19Eric MEAD64.42
20Tim YOCUM62.50
21Brian SHELDEN60.58
22Graham WOODRING58.65
23Rick DESPER56.73
24Steve KOEHLER54.81
25Donald WOODRING52.88
26Dan MATHIAS50.96
27Bradley BONE49.04
29Chris BARFIELD45.19
30Lori WHEELER43.27
31Andy SIMON41.35
32Mike BARNO39.42
33Rich O'BRIEN37.50
34Ronald FISHER35.58
35Jim YERKEY33.65
36Dave MCCRUMB31.73
37Marlin PIERCE29.81
38Spencer MCCRUMB27.88
39Bruce ALLEN25.96
39Kevin BROWN25.96
39Monty CARLISLE25.96
39Todd CRAIG25.96
39Sean D'EPAGNIER25.96
39Hunter DAVIS25.96
39Bruce DUEWER25.96
39Jason FISHER25.96
39Daniel KOLBAS25.96
39Travis MCTIGHE25.96
39Steve NICEWARNER25.96
39Bob ODEAR25.96
39Eddie ROTHENHEBER25.96
39Justin THOMPSON25.96

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