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.

GenCon Indianapolis 2008
Date August 14-17, 2008 Place Indianapolis
Number of players55 Number of rounds5 Number of boards14
Coeff 115.00 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Robert RICH99.09
2Thomas HAVER97.27
3Graham WOODRING95.45
4Jerry PROCHAZKA93.64
5Grant SMITH91.82
6Jim O'KELLEY90.00
7Chris (Sr) ALBIN88.18
8Brian SHELDEN86.36
9Andrew SHALLUE84.55
10David NIR82.73
11Patrick WEEKS80.91
12Jeff DEFAUW79.09
13Dan BURGESS77.27
14Mike BOMHOLT75.45
15David WILLIAMS73.64
16John HINES71.82
17Greg DUENOW70.00
18Chad MARTIN68.18
19Andrew BOMHOLT66.36
20Laurent JOLY64.55
21Dan LACUGNA62.73
22Will LIDDICOAT60.91
23Joseph RODENBECK59.09
24Rohan FLAVELLE57.27
25Eric GRINNELL55.45
26Jim KERWIN53.64
27Eric ODENIUS51.82
28Alex ROTHSTEIN50.00
29Aaron BRANTNER48.18
30Brennan BERRY46.36
30Ken BURRESS46.36
30Shawn MCDUFFEE46.36
33David ANDERSON40.91
34Marc BLANCHETTE39.09
35Joel FUCE37.27
36Brad LUND35.45
37Zack BUSH33.64
37Jeremy COOK33.64
39Chris PRIMEAU30.00
40Greg CLINTON28.18
41John POUNTNEY26.36
42Derek BALLING24.55
42Dan MCNEILL24.55
44Jason MCDUFFEE20.91
45Jason BRYAN19.09
45Chris FEDAK19.09
45Will MCNEILL19.09
48Michael LAWLER13.64
49John SOPER11.82
50David KOPF10.00
51Steve BLEEMER8.18
52John MILLER6.36
53Robert FIORIO4.55
54Eric SNYDER2.73
55Jacob BUSH0.91

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