The competition involves a maximum of five rounds - opening round followed by four jump-offs, not against the clock. The first round consists of four to six large single obstacles including the puissance wall, the starting height of which may vary from 1.70 to 1.80 m (5 ft 7 in to 5 ft 11 in) in height. For the jump-offs, in which the fences are raised for each round, there are only two obstacles—a spread fence and the wall—although an optional practice fence is included.