Pen and paper just won't do, unless you keep it simple and very basic.
Here is a rating which I have developed.
S-Factor = (Phi/n) *(Pr/Pl) *e^(A*F/n + B* R/nr)
I doubt anyone would want to use pen and paper to compute an S-Factor rating for each horse. Also some analysis is required to determine A and B. ...one can get very old fast doing analysis without a computer.
Alright what are the variables for the S-Factor?
Phi - Horse's odds in last race
n - # of runners in last race
Pr - Today's race purse
Pl - Purse last race
e - exponential function
^ - raised to the power
A - Constant to be determined
B - Constant to be determined
F - Finish in last race
R - Rank of average speed rating for the last two races
nr - # of runners in today's race
S-Factor -> The lower the better the rating.
How good is it? Test it yourself.
Mike (Dr Beav)
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