Great way to pass full Guard:
learned this from a friend who was pretty serious in becoming an mma fighter, he moved to las vegas and we lost touch, however...
When we trained the best/most effective move he tought was how to pass someone's guard. I can't believe how easy it is to learn and apply, yet I have NEVER seen it done in an mma event.
Try this out and let me know how it works.
Get into someone's guard(them on their back with their legs around your waist, closed guard).
Tell them it is there goal to keep you in their guard, not to let you escape(this way you can determine it's effectiveness).
How it works:
Try to lift your head to creat some space/distance, with each of your elbows, place each elbow on the inner part of your opponents knee, and simply apply pressure.
You will immediatly have them open their guard, now it's up to you to determine if you want to jump to a side mount, stand, or try to obtain full mount.
I have found it's easier to get into side mount, but please, try this and let me know if you find any flaws.