In common with other races on the continent, it is known for its arduous conditions and high attrition rate among competitors; the chances of finishing were 1 out of 10 and in 1972, 45 cars started, and no cars finished.
The passage describes a race that is known for being difficult and having a high number of participants dropping out; the odds of success were very low, with only one in ten chances of finishing, and in 1972, 45 cars began but none completed the race.