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The Ranking System
Logarithm System (PokerDollars) Calculation details: Where "X" is [a player's] finishing place out of "N" players, each [] individual tournament result is valued at: *** Log ( (N + 1) / X ) ...averaged over his number of plays...for example, with 300-player tournaments, a player finishing 1st, 300th, 300th would rate 1.9046, just slightly better than a player finishing 45th every time, 1.9004... And then these 'natural logarithms' are converted back into "percentiles"... *** Log = "natural" base for logarithms -- a universal number known as "e" = 2.718282... (second in 'fame' only to "pi" = 3.141593...) -- and "natural logarithms" are logarithms "to the base e" -- that is, numbers expressed as powers of "e"... The base "e" is key in many mathematical applications. Converting logarithms back to percentiles To convert the natural log score back to percentile, you need to use this formula: (1 - exp (-L) ) * 100 The variable L is the average of all the natural log score. The 'exp' means the inverse of natural log. For example, these are log scores from 3 different tournaments: 1.5, 2.0, and 1.0, so the average is 1.5. Then plug that number into the above formula:
= (1 - exp ( -1.5 ) )* 100
Percentile System The Ranking system requires a player to register a minimum amount of results in each time period in order to qualify for a Ranked position. These minimums are as follows:
Daily: 1 result We thought for a very long time of ways to give a fair result to a player and had many factors to consider. We believe this Ranking system is the most fair and accurate method possible. The Percentile Ranking works as follows: When a player finishes in "X"-th place out of a total of "N" players in an event, he/she achieves a "Percentile" score of : (1 - (X / (N + 1))) x 100 A player's ranking would be based on his/her average "percentile" score, averaged over however many tournaments he/she plays in a particular time frame once the minimum qualifying amount had been played. That is, there is no real advantage in playing more often. So on this basis, finishing 1st in a 10-player single-table satellite would be worth approximately the same as finishing 18th in a 200-player event. An example from the formula above:
Finishing 4th in a 10-player field = 63.64 "percentile". Overall ranking for a player achieving those four results would be: (63.64 + 63.68 + 80.39 + 80.44) / 4 = 72.04 "percentile". This means that on average, this player is beating around 72% of the field in the tournaments they play in.
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