Commentary
This play introduces a specific secunda custodia (Walpurgis guard), which in I,33 is presented only as an obsessio. Possibly (we don't have enough infromation for that) the obsessio works in a similar way as prima custodia besieging prima custodia. This is my interpretation of the whole play:
At the beginning, the priest attempted to cut hands of Walpurgis with halpschilt. Walpurgis pulled her hands back into specific secunda custodia, saving them. The priest swung through and ended in prima custodia.
Walpurgis immediatelly pushed both her hands forward in an attempt to pin the priest's hands at his body, in the same way as obsessio with prima custodia does (but with sword pointing up, not down). This is the Walpurgis guard besieging prima custodia, shown in the first image. If the priest didn't defend, walpurgis would pin his hands and immediatelly cut halpschilt from above to his head.
Before the priest's hands are pinned down, he performs schutzen to prevent the halpschilt cut. This is shown in the second image.
Walpurgis strikes into the priest's schutzen anyways, in order to take the bind, which is what I.33 recommends. She possibly starts performing a rebind. This gets the priest into a bind below and on the left, to which he reacts by pull and push technique, in the same way as in the play 38. This is happening in the third image.
Because the priest is leaving the bind, it means that we are in the play of binder and the bound, which is mentioned in text. Walpurgis reacts according to this play - she goes forward, checking the priest's weapons with schiltslack and hitting him in the same time.