To understand the format of a halfpipe contest.
In New Zealand, the only halfpipe event is held at the NZ Junior Nationals. The age divisions here are:
U16s and U18s are usually held in the super pipe, which is 6-7m high and long enough for 5-8 hits.
As halfpipes require a lot of snow and maintenance, there are seasons when there is only the super pipe available or the pipes are shorter than usual.
In the mini pipe this transition is much quicker, meaning rider has to adjust quickly to manage the change in pressure and position before performing their trick.
Transitions on the sunny wall are often more affected than on the shady wall.
In the mini pipe, the vert is much shorter meaning less speed is required but there is also less time to make movements during the takeoff.
Every hit is taken into account. If the athlete only performs tricks on their frontside wall, this is also considered by the judges.
The start order for athletes can vary at the junior level but are often simply done in the order in which athletes sign up to the event, or are generated randomly. This changes for FIS level and other international events.
Athletes are given an overall performance score for the whole jam session, meaning the more variety of tricks and consistency in landings, the better. Scores are out of 100.
The number of runs given depends on the event but is typically two. Scores are always out of 100, with the best score counting.
In most halfpipe contests, riders are judged on; progression, amplitude, variety, execution and difficulty.