The defender is not allowed inside any of the 4 areas and can only try to intercept the ball.
The players keeping possession can only pass the ball to empty areas, so therefore the players need to run out of their 'safe' box area to be able to receive the ball in that area.
Progression:
To make more movement, if a player leaves an areathey are not allowed to return to that area until having been in another area.
Create a resolution to develop your coaching confidence by seizing the opportunity to discover new drills, turn ideas into action and seek advice from the coaching community.
World Rugby has reportedly conceded Aaron Smith's disallowed try in the World Cup final should have stood.
"It is not only useful for staff who are experienced but a valuable tool for those subject staff who have to take teams."