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.

International ranking (National ranking)19 (10) Score74.73

DateCountryName of the tournamentRankCoeff1Score
2019-09-08DipCon 20195/4715.0090.43
2019-09-01World DipCon XXIX 20194/3820.0090.79
2019-05-26Dixie 33 20192/3612.2995.83
2018-11-03Carnage on the Mountain 201815/3311.4356.06
2018-10-07World DipCon XXVIII 201810/9420.0089.89
2018-05-27Dixie 32 201817/4113.7159.76
2017-05-28Dixie 31 201711/2810.0062.50
2016-06-26World DipCon XXVI 201633/9320.0065.05
2015-05-24Dixie 29 20152/259.1494.00
2015-01-01NADF Masters 201510/248.8660.42
2014-10-12Tempest in a Teapot XVI 20147/2810.0076.79
2013-02-03TempleCon 20133/135.7180.77
2013-01-20NADF Masters 201312/228.2947.73
2011-11-06DipCon 44 201126/3612.2929.17
2011-06-19Massacre 20112/135.7188.46
2011-05-29Dixie 25 20115/368.0087.50
2010-10-17Tempest in a teapot XII 20102/3010.5795.00
2010-05-30Dixie 24 201020/3010.5735.00
2005-07-31World DipCon XV 200575/8320.0010.24
2004-08-15Tempest in a teapot VI 200430/5615.0047.32
2004-06-27Origins 20041/4113.7198.78

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