Hi again Cheekyshiraz,

For what its worth, I use the basis of 1 length = 1 1/2 kgs. And there is 6 lengths to one second. So in your first example horse B would beat horse A by .6 of a length. So I calculate horse A would run that 1000m in around 59.1

As to your second example,....not sure of formulas to differentiate good from heavy etc. My formulas are very general.

Good luck, Paul