CUT OVER AND DISENGAGEMENT
is on the same principal as the one-two and the beat and disengagement. On the adversary opposing the first movement (the cut) with a parade, the second movement (the disengagement) is made to the opposite side, to be followed, of course, by the longe, the extension of the arm being divided between the two movements.
These attacks are called simple attacks, because they may be parried by one or more simple parades, according to the number of movements in the attack. In fact, every attack can be parried, and every parade can be deceived; it is the additional movement last made which hits or guards.
Thus, you threaten by a disengagement to the outside; your adversary bars your way effectually by the parade of tierce; you make a second disengagement to the inside, which is now exposed from the very fact of the outside being guarded (for both lines of attack cannot be guarded at the same time), thus converting your attack into one-two; but if your adversary parries quarte on your second movement, your attack would be warded off. This can be carried much further, but the above will, I think, be sufficient to explain the nature of simple parades and attacks.
To deceive a contre-parade, a separate movement, called a