Puzzle Scoring Adjustments
Hey everyone,
As a result of some of the feedback we've had (along with some common sense), we're adjusting how points are given out when puzzles close.
The current function for calculating points is:
Points = Max(1, RoundUp((1 - (Rank - 1)/(NumPlayers - 1)^7 * X))
We are adjusting the exponent (currently 7) to be 6. What this will mean is that there will be slightly less of a point difference between the top spots in a puzzle, and more of the lower ranks will get more than 1 point.
We're fairly confident that the best value for the exponent is actually below 6, but for now, we're sticking with this small change.
(Fri, 07/27/2012 - 22:36 | 9 comments)
No. The term inside of the RoundUp function is being multiplied by the number of points available for the puzzle (this is the X value). So for a 100 point puzzle, it is multiplied by 100. RoundUp will round up to the nearest integer, which is very often more than 1.
I updated the OpenOffice sheet that calculates global points:
http://images1.wikia.nocookie.net/foldit/de/images/b/bf/Global_Points_Calculator.ods
WheneverI do Points = (1 - (Rank - 1)/(NumPlayers - 1)^7 * X) I get .99999999993
Oh, and I put x as 100 and have used 31 and 188 as rank and 188 as NumPlayers.
Here are two examples.
Number of players: 101
Rank: 31
1-30/100=0.7
0.7^6*100 = 11.76 ==> 12 points
Number of players: 201
Rank: 121
1-120/200=0.4
0.4^6*100 = 0.4096 ==> 1 point
I was using order of opperations. Apperantly you aren't supposed to. :)
I think they actually have a parenthesis missing. I've done a few sample calculations using Puzzle 599's scores (which uses the old exponent of 7), and the equation should be:
Points = RoundUp( ( 1 - (Rank - 1)/(NumPlayers - 1) )^7 * X)
Or Points = RoundUp( ( (1 - (Rank - 1))/(NumPlayers - 1) )^7 * X)
![](http://128.95.1.228:8000/tracking_pixel.gif?events=scAdd&f=1111&wdata={"x":12, "y":11}){kind=tracking}
If it is max 1 or the other number, it is always 1. Also, what place is roundup rounding to? These issues prevent me from calculating the score correctly, right?