You do this one in the Expert training. Be really quick and zip through training untill you get to the courtyard. Shoot the 3 targets with arrows, knock the dummy. Then hurry and run into the room the guard is walking from. If you see a hallway leading to a door then you have been quick enough. Go back out and fight the guard untill he is done and starts to walk back. Hurry up and grab the key off the table and run past the guard to beet him back in the room. Go to the door and use the key on it. Now you can play basketball.
Submitted by Joshua (email@example.com