When I was twenty years old I had a decent percentage on Western fencing's ring drill. You hang a woman's ring from two pieces of string, so that it does not rotate, and then you thrust your epee through the hole. If the ring does not move, you win.
I am now past sixty. I can see the damned ring if I look through the right part of my bifocals.
Adaptation: If you have a saber you can cut the strings midair. You don't have to see them.