There is an easy trick in this game, and almost everyone uses it. Show the wins, bury the losses. Post the winning Saturday, go quiet on the four losing ones. Do that for long enough and even a losing method can look like a licence to print money.
We built the AI Lab to do the opposite. Every prediction the model makes is logged before the off and scored afterwards, win or lose. Every system a punter brings gets run over real British races, with fallers and pulled-up horses settled as the losers they are. Nothing gets quietly dropped because it had a bad month.

