SE4 Rating System

[primitive]

That was the idea (if using 40 and 50 % as factors). But in hindsight, I don't think I like it very much

Coming Last or second to Last shouldn't really be much different scorewise, so your formula is better there. There should however always be a positive score for coming 2nd, so a little tweak may be in order.

The "perfect" formula for a 4 player game should give something like:
A = +30 points
B = + 5 points
C = -15 points
D = -20 points

And for 5 players:
A = +35 points
B = +15 points
C = - 5 points
D = -20 points
E = -25 points

Now thats a challenge for the math geniuses