Backs need to cover counter-attacking wings. Center covers advancing pivot.
If counter attack aborted retreat as quickly as possible to six to stop wingers cutting in as second pivot.
"It is not only useful for staff who are experienced but a valuable tool for those subject staff who have to take teams."
The variety of sessions across sports - sometimes we steal session ideas from one sport and use them with another.
As we enter the business end of the competition, we take a look at the remaining eight teams and the key talking points surrounding each side.