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.

ManorCon 21 2003
Date July 19, 2003 Place Birmingham
Number of players52 Number of rounds3 Number of boards15
Coeff 115.00 Coeff 2- Coeff 3-

RankFirstName LastNameLoc.Nat.Score
1Ivan WOODWARD99.04
2Yann CLOUET97.12
3Phil DAY95.19
4Simon BOUTON93.27
5Vick HALL91.35
6Dave WREATHALL89.42
7Iain MCLELLAN87.50
8Richard WILLIAMS85.58
9Douglas MASSIE83.65
10Brian DENNEHY81.73
11Mark WIGHTMAN79.81
12Jeremy TULLETT77.88
13Demis HASSABIS75.96
14Thomas FRANKE74.04
15Emeric MISZTI72.12
16James HARDY70.19
17Paul CRIDLAND68.27
18Keith SMITH66.35
19Chetan RADIA64.42
20Cyrille SEVIN62.50
21Neil DUNCAN60.58
22Dan LESTER58.65
23David PERCIK56.73
24Andrew GRECO54.81
25John STRATFORD52.88
26Simon HORNBY50.96
27William ATTIA49.04
28Eve SMITH47.12
29Thomas SEBEYRAN45.19
30Toby HARRIS43.27
31Shaun DERRICK41.35
32Fearghal O'DONNCHU39.42
33Sean MCGUINESS37.50
34Steve AGG35.58
35Andrew HARTLEY33.65
36Alan SHARPLES31.73
37David NORMAN29.81
38Gordon AICKIN27.88
39Keith RICHARDS25.96
40Andrew WADE24.04
41Eric KNIBB22.12
42Nick PARISH20.19
43Geoff SIMMONS18.27
44Adam WILSON16.35
46Danny COLLMAN12.50
47Nigel PEPPER10.58
47Justin SADLER10.58
47Mark SHEIHAM10.58
50Mark STRETCH4.81
51Pete MASON2.88
52John COLLEDGE0.96

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