Half Pass – The half-pass is also a lateral movement seen mostly in dressage in which the horse moves forward and sideways at the same time.
Unlike the easier leg-yield, the horse is bent in the direction of travel, slightly around the rider’s inside leg.
Side Pass – When doing a side pass your horse moves directly sideways in response to your rein and leg aids.
Teaching your horse to do a side pass, also called a full pass, will make him more obedient, safer, and more fun, because he is must be very broke to do it. A true “side pass“, means your horse moves laterally without any forward movement.
To side pass correctly, the horse must move both forehand and hindquarters directly sideways and cross over in front of the opposite foot and his head is aimed in the direction of travel.