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.

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International ranking (National ranking) () Score

DateCountryName of the tournamentRankCoeff1Score
2018-02-25TotalCon 201824/269.439.62
2015-11-08Carnage on the mountain 201528/3311.4316.67
2015-10-11Tempest in a Teapot XVII 201537/3913.146.41
2015-08-09DipCon 48 201531/4715.0035.11
2014-10-12Tempest in a Teapot XVI 201422/2810.0023.21
2014-07-06Massacre 201418/3110.8643.55
2014-05-25World DipCon XXIV 201450/8720.0043.10
2013-10-13DipCon 46 201323/3311.4331.82
2013-08-17GenCon Indianapolis 201332/6715.0052.99
2013-07-07Massacre 201315/269.4344.23
2013-01-20NADF Masters 201313/228.2943.18
2012-10-07Tempest in a teapot XIV 20123/166.5784.38
2012-09-16NYC Diplomacy Tournament 20123/135.7180.77
2012-08-19HuskyCon 201213/3612.2965.28
2011-11-06DipCon 44 201128/3612.2923.61
2011-10-02Tempest in a teapot XIII 201113/259.1450.00
2011-08-22HuskyCon 201129/3913.1426.92
2011-02-06TempleCon 20118/156.2950.00
2010-10-17Tempest in a teapot XII 201026/3010.5715.00
2010-07-11HuskyCon 201043/4815.0011.46

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