The leg-yield and half-pass are seen in dressage, and require the horse to have forward movement, resulting in the horse moving in a diagonal line. The main difference between the two movements is the direction of bend: with the horse bent in the direction of travel in the half-pass, and kept straight in the leg-yield. Therefore, the half-pass is much more difficult, requiring greater engagement and collection from the horse. It is important to note that the half-pass is a variation on the three-track movement, haunches-in, although it is a two-track movement itself.