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 XII 2002
Australian Championships
Date March 29 - April 1, 2002 Place Canberra
Number of players57 Number of rounds6 Number of boards28
Coeff 120.00 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
2Grant STEEL97.37
3Yann CLOUET95.61
4Dominick STEPHENS93.86
5Craig SEDGWICK92.11
6Manus HAND90.35
6Guillaume VUILLIN90.35
8Rohan FLAVELLE86.84
8Rob SCHONE86.84
10Steve GOULD83.33
11Andrew GOFF81.58
11Jason WHITBY81.58
13Greg EVANS78.07
14Shane CUBIS76.32
15Andrew CHEEVERS74.56
15Tony COLLINS74.56
15Brian SHELDEN74.56
18Edi BIRSAN69.30
19William ATTIA67.54
20Dan MATHIAS65.79
20Chad NIMMAGADDA65.79
22Cyrille SEVIN62.28
22Mark WITHNELL62.28
24Frank MEERBACH58.77
24Christian Gemballa MOURA58.77
26Philippe CLAVAUD55.26
26Ian MOES55.26
28Chris BURKE51.75
29Vincent CARRY50.00
29Chetan RADIA50.00
31William BLACK46.49
31Geoff KERR46.49
31Peter TAYLOR46.49
34Don DEL GRANDE41.23
34Tristan LEE41.23
36Brett CHATTERTON37.72
37Rohan KEANE35.96
38Stephen MUZZATTI34.21
38Larry PEERY34.21
40David ASTLEY30.70
41Craig BROWN28.95
42Michael DOWLING27.19
43James BOUNSALL25.44
43Robert HADLEY25.44
43Griff YOUNG25.44
46Sean COLMAN20.18
46Sean PHELAN20.18
48Geoff BAKER16.67
49Bill BROWN14.91
49Doug STEWART14.91
51David NORMAN11.40
52Brendan WHYTE9.65
53Neil ASHWORTH7.89
53Andrew GERAGHTY7.89
53Shane HUNTLEY7.89

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