Specifically turning the long edge up to parry echoes Meyer’s “Gerarde Versatzung” and parry advice from his 1570 text.

The “overwrap” of the pommel and push with the left hand actually most resembles a play from Fiore de Liberi’s “Flower of Battle”, which is in the Italian tradition, although similar grappling plays do show up in KdF manuals.

No footwork is mentioned, as this play is relying on the movement of the horses.

The wave-like motion mentioned by Else with facilitate the “up” on the initial bind and the “down” on the pommel hook. The forward motion of the horse will provide the “drive” need to complete this type of “hook and push through” grapple.

This play is shown in armor, although it works equally well in unarmored fighting, and many grappling plays are described in unarmored fighting manuals.

The success of this play hinges on the horse's gait. NOTE: One manuscript depicts the horses in a walk; the other, in a canter.

A multi-step defense is difficult to accomplish at speed as each element takes time. A walk allows more time to incorporate all the elements of this play. The Getty Fiore also depicts this bind and similar grappling plays at a walk (MS Ludwig XV 13 Fior di Battaglia, c1404).

There is a natural wave like motion to the canter that provides upwards force. Those added motion aids in unhorsing an attacker even in a high-backed saddle. Grappling during the upward motion provides lift similar to rising up out of a knee bend when unmounted. Highly trained horses can perform a very slow canter at an almost walk speed.

Once grappling commences both attacker and defender drop their reins on to a hook. Steering comes from the seat and resulting weight shifts. Using the hook allows the rider to recover the reins after a successful pass.

The defender is advised to reach with the left hand and pull the attackers chin. This twisting motion will likely first add weight to right seat bone (pelvis). As the torso un-twists, the defender will pick the weight off of the right seat bone and move the left seat bone down and perhaps back. This weight shift will send the defender's horse to the left adding leverage for unhorsing the attacker to the side (as in plate 19 above) Riders in war saddles are more susceptible to unhorsing to the side than front to back.

The initial attacker pushing off with both hands is likely interrupt the measure of the play that depends on timing for success.