

Translations
Here are three players who want to kill this master. The first one who wants to hurt him carries his lance underhand half way down its length. The other couches his lance at full extension. The third one wants to throw his lance. It has been decided that no one should take more than one strike each. They also attack one by one.
Come one by one who wants to, for I will not leave for any of you. Also I wait in Posta Dente de Zenghiaro (Boars Tooth Guard). When the lance is set against me or thrown by hand, I immediately pass off the line, that is, my right foot advances and with the left I pass across, beating the lance aside that comes to hurt me. Not once in a thousand times will this fail. What I do with the ghiavarina, I could also do with a staff or sword. And the defences that I make against the lance, I could also use against the sword and the staff in the plays that follow.
Explanation
The Master of Spear vs Horseback finds himself in the most unenviable situation of being caught on foot and about to be ridden down. Even if the attackers weapon misses, it is quite possible that the master will be knocked to the ground and trampled to death.
Having horses race at you like this is a mentally shattering experience. They close with tremendous speed. The ground literally shakes, and the air is filled with the pounding noise of hoofbeats. The shaking ground produces uncontrollable fine motor tremors in your body which are very similar to a fear response. Regardless of your emotional state, the body leads the mind in such circumstances to panic. To survive this, the Master needs a clear head, and impeccable timing.
The Master here is armed with a ghiavarina. This is a long bladed spear capable of both cutting as well as thrusting. Closely related to the hunting spear, it has large lugs to prevent your dying target climbing up the shaft.
Wait in Posta Dente di Zenghiaro. As your opponent bears down on you, step offline with your front foot, striking diagonally upward, and beating their weapon aside. This will leave you well positioned to make your counter as seen in the following plays.
A technically very simple move, the circumstances make it considerably harder to perform in practice. Due to the speed the horse gives to your opponent, you will need to move very quickly. Depending on how close their line of attack is, you may need to step quite a long way out to avoid being knocked over by the horse itself. Also, the intimidating prospect of being ridden down by cavalry will require you to have nerves of steel.