The pedigree of a Thoroughbred is but a one-dimensional grid to the naked eye. What one chooses to see beneath it depends entirely upon them. Good horses are produced by accident, it's true. But in a business where the overwhelming majority of foals, even from the most prolific crosses, never win a black-type race, bloodstock consultant Gary Hadden makes it a habit to look beneath the surface when planning matings, always looking for ways to increase the odds in favour of his clients. "The thing that everyone probably starts with...