World Diplomacy Database

The World Diplomacy Database


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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.

World DipCon XXIV 2014
Dixie 28
Date May 23-25, 2014 Place Chapel Hill
Number of players87 Number of rounds4 Number of boards40
Coeff 120.00 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Thomas HAVER99.43
2Dan LESTER98.28
3Phil WEISSERT97.13
4Tom KOBRIN95.98
5Edwin TURNAGE94.83
6Brian ECTON93.68
7Steve KOEHLER92.53
7Brian SHELDEN92.53
9Adam SILVERMAN90.23
9Stephen WEINGARTEN90.23
12Hudson DEFOE86.78
13John JAMIESON85.63
13Nicolas SAHUGUET85.63
16Yann CLOUET82.18
17Marc PETERS81.03
18Edi BIRSAN79.89
19Rick DESPER78.74
19Steve LYTTON78.74
21Matt SHIELDS76.44
22Toby HARRIS75.29
23Andy BARTALONE74.14
24Joe WHEELER72.99
25Edward PREM71.84
26Dave SIMPSON70.69
28Christian MACDONALD68.39
29Eric GRINNELL67.24
30Matt SUNDSTROM66.09
31Andrew GOFF64.94
32David MALETSKY63.79
33Chris MARTIN62.64
34Mark STEGEMAN61.49
35Doug MOORE60.34
36Ike PORTER59.20
37Mike HALL58.05
38Eric MEAD56.90
39Steve COOLEY55.75
40Siobhan NOLEN54.60
41John GRAMILA53.45
42Chris BRAND52.30
43Laurent JOLY51.15
44Michael MC MILLIE50.00
45Peter YEARGIN48.85
46Jeff LADD47.70
47Travis MCTIGHE46.55
48Bernard ANDRIOLI45.40
49Adam SIGAL44.25
50Brent WADDINGTON43.10
51Jim YERKEY41.95
52Dan BURGESS40.80
53Nathan BARNES39.66
54Steve NICEWARNER38.51
55David NORMAN37.36
56Robert ROUSSE36.21
57Claude WORRELL35.06
58Steve WILCOX33.91
59Michael BINDER32.76
60David JOHNSON31.61
61David HOOD30.46
61Filippo LONARDO30.46
63Manus HAND28.16
64Jay HEUMANN27.01
65Nathan COCKERILL25.86
66David HILL24.71
67Roland COOKE23.56
69Thaddeus BLACK21.26
69Jim O'KELLEY21.26
71Don SCHEIFLER18.97
72Tom REINECKER17.82
73Freeman BUTLAND16.67
74Spencer MCCRUMB15.52
75Bob ODEAR14.37
76Jason MASTBAUM13.22
77Aash ANAND12.07
78Danny GRINNELL10.92
78Bill LAFOSSE10.92
80Ellie DIXON8.62
80Jim HACKER8.62
80Chris KREMER8.62
80Dan MATHIAS8.62
80Ken MATHIAS8.62
80Dave MCCRUMB8.62
80Justin THOMPSON8.62

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