Originally Posted by MadamKing
...I was trying to explain that leg-yield is like half pass, but moving more forwards than sideways, not that half-pass moves forward because it doesn't. ...
Just to fix a mis-conception you had above -
LY and HP are BOTH forward movements - forward and sideways. In LY the horses looks in 1 direction and moves in the opposite direction, bending around the outside leg. In HP the horse moves in the direction it is looking, bending around the inside leg. Another thread in this forum asks about dressage movements and another poster was nice enough to post videos to various movements. Looking at the videos will help out quite a bit.
My mare can do a LY straight across the arena - ending up almost straight across from where she started about 2-3 steps in front of where she started.. HP can not be done quite so steeply - at least not by us.