The most prominent national horse breeders meet once a year at the international horse auction, in order to expand their horse breeding business. They all try to become the most successful stud farm by purchasing the best thoroughbreds.

Players each have an identical set of cash cards with which to bid on cards from the market deck. Each market card shows different amounts of horses of each of the five breeds in the game. Any time during play, a player may decide to claim stake in two of those breeds and will use them to score his market cards at the end of the game. However only two players at most may claim each breed.