A new performance-based rating system for Thoroughbreds has been launched by Equibase to provide "more options for tracks to consider when developing race conditions," the company said in a release Thursday. The first such race using the Equibase rating will be contested at Santa Anita on Friday, Oct. 24. The Equibase rating provides an algorithmically generated predictive performance score based solely on race outcomes and measurable factors such as speed, race strength, track conditions, and trip factors and was developed with the input of industry stakeholders with the goal of...