The defender is only allowed to move up and down the line as shown. The attacker can move anyway within the box to try and catch the ball.
Introducing the Sportplan FootballBot. Your new coaching partner that has all the answers to the questions you may have...
Introducing the Sportplan RugbyBot. Your new coaching new coaching partner that has all the answers to the questions you may have...
Introducing the Sportplan HockeyBot. Your new coaching partner that has all the answers to the questions you may have......