Turn on the haunches is tricky movement performed out of working/medium walk and is preparation for the pirouette, which requires a collected walk.

Your horse's front legs should move in even, quiet and regular steps around inner hind leg of the horse, while maintaining the rhythm of the walk. Sounds easy, but requires timing and practice to perform well.

As a judge: I look for the horse contentedly chewing and accepting the bit, flexing toward the direction of the turn, and moving with active but unhurried steps on the hind legs forward and sideways through the required 180 degree's. The horse must move freely forward and sideways within the walk rhythm, to about one meter around the hind legs.

A good practice exercise: Ride an 8m circle in walk and then to perform this exercise in traverse. This allows the horse to maintain bend but to place the hind legs inside the 8 meter circle while the forehand is still moving on the 8 meter circle. This way you learn to control the horse’s outside shoulder.

Purity of the gait is an essential: To help keep the four beat walk clear in the turn on the haunches you and your horse must stay thinking, marching purposely forward. So when you practice do not just ride the required movement as in the test, ride 1/4 turns in the corners for instance. Play with shoulder and haunch control, keep your horse fresh, forward and anticipatory of your aids.