Horse race simulator: run today's Hong Kong races

Run any Sha Tin or Happy Valley race in your browser: the horses race down their lanes and the finish is drawn from the win chances we sealed before race 1. Press Run 100 times to see how often each horse wins — the more you run, the closer the shares get to the sealed chances. That is a Monte Carlo simulation.

Each press is one possible race and can finish differently; our sealed top 3 does not change. The chance is our form-and-speed rating turned into a share of 100% within the race (exp(4.60 × rating), fitted once on past races; no prices are used). Prediction, not a promise of winnings. 18+. How the record works →