Factbox - Breakdown of quadruple jumps, highest scores and judging

HELSINKI (Reuters) - A breakdown of the quadruple jumps, the judging system and the highest scores recorded ahead of the men's competition at the figure skating world championships in Helsinki which start on Wednesday.

Toeloop - Take off is from a back outside edge and landing is on the same back outside edge. The toeloop is the jump most commonly attempted and is often tagged on to a more difficult jump in combination. It is considered the easiest because skaters use their toe-picks to lift off and, once airborne, their hips are already facing the direction in which they will rotate.