World Diplomacy Database

The World Diplomacy Database


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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.

WAC 9 2012
Date January 27-29, 2012 Place Seattle
Number of players45 Number of rounds4 Number of boards20
Coeff 114.86 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Adam SIGAL98.89
2Andy BARTALONE96.67
3Nathan COCKERILL94.44
4Adam SILVERMAN92.22
5Chris BRAND90.00
6Jim O'KELLEY87.78
7Edi BIRSAN85.56
8Doug MOORE83.33
9Peter YEARGIN81.11
10Brian SHELDEN78.89
11Peter MCNAMARA76.67
12Nathan BARNES74.44
13Kyra OLSON72.22
14Adam BEREY70.00
15Brad BASDEN67.78
16John JAMIESONn.c.65.56
17Graham WOODRING63.33
18Nathan SCHLAUD61.11
19Eric OZOG58.89
20Roland COOKE56.67
21Eric MEAD54.44
22Phil WEISSERT52.22
23Chris MARTIN50.00
24Alex COLLINS47.78
25Mark WARD45.56
26Dennis MURRAY43.33
27Christian MACDONALD41.11
28Nathan DEILY38.89
29Stephen MCKEOWN36.67
30Robert PREMUS34.44
31Everett TISHLER32.22
32Kirk PETERSEN30.00
33Chuck SPIEKERMAN27.78
34Peter LOKKEN25.56
35Tony VILA23.33
36Tony PROKES21.11
37Mike HALL18.89
38Chris BARFIELD16.67
39Brian MURDOCK14.44
40Nigel HOOPER12.22
41Tony SANTAFERRA10.00
42Ryan WITMER7.78
43Clifford TONG5.56
44Dan BURGESS3.33
44Mark ZOFFEL3.33

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