In October 1950 a 12-hour race combined for SportsCars and Saloon Cars was held at the Brno circuit. The race organizers created an interesting and unique mathematical formula (the so-called power output indicator) to equalize the potential of all cars. The formula was based on a predetermined average speed that differed for cars with various engine capacity, and the corresponding distance expected to be covered by each car over the 12-hour period. The actual distance traveled by a car was then divided by this expected distance to arrive at a quotient, and the results were based on the values of this quotient. Consequently, even cars with the smallest engine size could win the race if they reached sufficient distance, while anybody failing to complete the expected distance was not classifi