This invention is an engine that allows, for any play in an “in play” or single play betting game, that both calculates “basic odds” (calculated by using historical database mining) and at least one more odds making formula to calculate odds on at least one outcome of a single play in a live event, crossing at least two different odds making formulas to create crossed odds. Then utilizes artificial intelligence to correlate the crossed odds with the final odds on similar historical plays in which odds were calculated. Then utilizes machine learning after the outcome of the play is known to correlate the odds generated by each odds making formula with the most profitable odds calculated on previous similar plays.