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Originally Posted by miraja2
BSFs consist of two elements:
1) A speed rating, which translates the time of every race into a number.
2) A track variant, which measures the swiftness of the racing surface on a given day.
You combine the two to get the BSF. So if a horse runs a race with a speed rating of 90, on a track with a variant of -10, that horse would receive an 80.
The track variant often changes from one day to the next.
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I understand what a track variant is, just not sure how it is figured on a day to day basis.