Perhaps there is a simple solution that I simply haven't stumbled across yet, but I am have having problems exposing my opponent's throat for certain chokes when we are face to face. I know several methods from behind but really nothing when I am on top or in guard. Specifically I am finding it nigh impossible to sink in a Sode Guruma Jime (Ezekiel Choke) before they bury their chins. I really like this choke in drilling and it seems very quick and oh-so-tight if you can slap it on, but I just can't get it on a live opponent. Ideas?