I am going to put up a series of dressage definitions for discussion so as a supplement to the suppleness thread, crookedness is almost as least known ( or fuzzy in understanding).
Crookedness is produced when one hind leg evades the even loading of weight by not advancing forward but to the side. This will result in the horse moving in a direction that is not in the direction of motion.
This is one of the most difficult evasions to correct as many will think their horse is straight but in fact is not.
I am putting these threads up for discussion and questions that may be asked by those starting ( or advancing) in dressage but not fully understanding some of the basic principles.