Deny the gates in a tight space. React fast, get side-on early, and win the ball or force it wide before the attacker can pick a gate.
As the base, but in a squeezed channel with the gates closer and the defender starting nearer. Quicker actions, shorter reaction time. Emphasise an early side-on shape and a decisive first move. Rotate the roles and both sides.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.