what is the yurchenko double pike

The Yurchenko double pike is a vault in womens artistic gymnastics that was first performed by Simone Biles. It is the most difficult vault in womens gymnastics and has the highest D-score of any Yurchenko variation. The move consists of two flips in the pike position where the legs are extended. The Yurchenko vault family is named after Natalia Vladimirovna Yurchenko, a gymnast who trained under Vladislav Rastorotski. The pair designed a new way of moving onto the vaulting horse, which involves a round-off onto the springboard and a back handspring onto the horse. The Yurchenko vault family includes several variations, and the D-scores are influenced by the degrees of rotation around the transversal and longitudinal axes of motion during the second phase of flight.