 The show was sponsored by Moto-Phoe, the Bulgarian representative company for Ford Motor Company, that's why the main prize was a Ford car (Ford Ka, Fiesta, Escort, Focus and Mondeo models).The winner of the previous rounds in the game had to choose a Ford car key, numbered from 1 to 10.Then they had to answer a question, attached to the key and if the answer was correct, they were allowed to try to unlock the left front door of the car.