Ski halfpipe is similar to the snowboard event, but the athletes (or freeskiers) wear freestyle skis with tips on both ends. One at a time, the skiers travel down the halfpipe and perform a personal routine of big airs, flips, twists, corks and other tricks.
Trick to watch for
The unnatural double cork 1260 has the skiers perform two off-axis flips with three and a half rotations while spinning in the direction they aren’t naturally used to. Canadian Justin Dorey has it in his trick repertoire.
The athletes are judged on overall impression out of a total possible score of 100. Overall impression takes into account amplitude, technical difficulty, style, flow, variation and execution. The best score out of the two runs is recorded.
30 men, 24 women compete in two qualification runs
The top 12 finishers move to the finals, where they complete two more runs.
The best score out of the two final runs is recorded for each skier and the highest score wins. (Scores do not carry over from the qualification to the final.)
Canadians to watch
Mike Riddle, Justin Dorey, Noah Bowman and Matt Margetts have all had top five finishes this year. Rosalind Groenewoud is a former world champion and gold medal favourite.
Events take place Feb. 18 and 20.
GRAPHICS BY TRISH MCALASTER/THE GLOBE AND MAIL