Current Tantrix Online Tournament Elo Ratings

Key:

Pos is the player's position, a bold number if in the official list. To compare those in the official and unofficial lists reasonably fairly, click here for the current Tournament Seeding list.

Last is the player's position on the previous rating list - UNO means that the player was previously on the unofficial list and has now played enough games get over the G=20 threshold for getting onto the official list and NEW means the player has just played their first tournament.

Chg is the change in the player's position since the previous rating list - UNO means that the player was previously on the unofficial list and has now played enough games to get over the G=20 threshold for getting onto the official list and NEW means the player has just completed their first tournament.

T is the number of tournaments in which the player has played at least one game, with the WTC and Plate competitions counted as the same event.

P is Y if the player has played a tournament since 1 January of the last complete calendar year, N otherwise.

G for a tournament is a measure of the number of games played. Previously a little more complex, since 2000 it has been one for each game played, with the weighting of games played in previous years halved after every twelve months. TP % and AOR are also de-weighted accordingly after each 12 month period. For more details, please see section 4) on the rating method page.

* Elo * Rating is the player's overall Elo rating.

Time Decay Factors show the factors being applied to G for each tournament. Each full year after a tournament is played, G from that tournament is halved, hence halving the weighting of each player's rating from this tournament. This is designed to stop someone staying in the official list when they haven't played many tournament games for a long time and to ensure that the most recent results have the greatest (but not the only ...) effect on the overall rating.

Individual Tournament Ratings show how stable or variable a player's performance has been in different tournaments.

Contl includes all single-continent Championships - if you click on this, you will need to click on the results sheet for the tournament concerned to find the full results.

On individual tournament results sheets, in the Elo rating section:

TP % is the average (weighted by G) percentage of possible tournament points scored by the player in their games.

Fctr is the performance factor implied by TP %, read off an inverse normal distribution, as described on the rating method page.

AOR is the average (weighted by G) of the Elo ratings of the player's opponents - the higher the AOR, the better the opponents the player has played on average. In the Elo calculation, this allows for the fact that it is much easier to get a high TP % against weaker opponents.

Further information:

The following links contain more information. Those marked with *'s are fairly simple (I hope!), the others are aimed at the statistically-minded who might want to check out the mathematical theory behind the method and look for any flaws - I know there are some of you! :-)

The date and time are :

Thursday, 02-Sep-2010 21:36:39 GMT
Thursday, 02-Sep-2010 22:36:39 BST (local)

This file was last modified on Sunday, 01-Jun-2008 21:26:05 BST

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