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.

DipCon 47 2014
WAC 11
Date January 24-26, 2014 Place Seattle
Number of players65 Number of rounds4 Number of boards29
Coeff 115.00 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Dan LESTER99.23
2Chris MARTIN97.69
3Steve COOLEY96.15
4Andrew GOFF94.62
5Mary KUHNER93.08
6Doug MOORE91.54
7John GRAMILA90.00
8Robert PREMUS88.46
9Brian SHELDEN86.92
10Edi BIRSAN85.38
11Peter YEARGIN83.85
12Jake MANNIX82.31
13Andy BARTALONE80.77
14Nathan DEILY79.23
15Roland COOKE77.69
16Jim O'KELLEY76.15
17Stephen WEINGARTEN74.62
18Andy HULL73.08
19Peter MCNAMARA71.54
20Kevin O'KELLY70.00
21Adam SILVERMAN68.46
22Yann CLOUET66.92
23Manus HAND65.38
24Len TENNANT63.85
25Stephen MCKEOWN62.31
26Eric MEAD60.77
27Alex COLLINS59.23
28Bernard ANDRIOLI57.69
29Brad BASDEN56.15
30Jonathan KEITH54.62
31Aash ANAND53.08
31Nathan COCKERILL53.08
33Dan BURGESS50.00
34Siobhan NOLEN48.46
35Jonathan BASHFORD46.92
36Mike MOORE45.38
37Jason O'DONNELL43.85
38Adam BEREY42.31
39Alex AMANN40.77
40Chris BRAND39.23
41Ike PORTER37.69
42Chris PRICHARD36.15
43Mike HALL34.62
44Jason MASTBAUM33.08
45Chuck SPIEKERMAN31.54
46Kyra OLSON30.00
47David DEARING28.46
48Jim CAUSEY26.92
49Alex MASLOW25.38
50Larry PEERY23.85
51Brian DONOHUE22.31
52Jerry FEST20.77
53Brian MURDOCK19.23
54Derek MAFFETT17.69
55Tony ELDENBERG16.15
56Jeremy BARNES14.62
56Logan CRECRAFT14.62
56David MALETSKY14.62
56Robert O'CONNOR14.62
56Eric OZOG14.62
56David SIELAFF14.62
56Tony VILA14.62
56Jack WELLS14.62

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