Poker stars league ranking system

Algorithm
---------
A player's score for a tournament is based on three
variables:
1. The size of the tournament,
2. Where the player finished in the standings, and
3. The cost of the buy-in.
The score is computed using the following algorithm:
score = 10 * (sqrt(n)/sqrt(k)) * (1 + log(b+0.25))

where

n = the participant count for the tournament and
k = the player's finish in the standings
b = the cost of the buy-in
** Only the top 15% of the finishers in a tournament
receive points.

Overall score is the average of all tournament scores.

Examples
--------
Bon finishes 3rd in a 150 player tournament with a $20
buy-in.
Bon receives 163.09 points:
. 10 * (sqrt(150)/sqrt(3)) * (1 + log(20+0.25))

Dr. Neau's Comments
-------------------
Haven't tried it yet.