Butterfly guard as the opponent advance kick out knees to stop progress opponent will normally grab knees

Both hand attack opponents right collar left arm on top right arm (cross grip) on bottom. Thumb up

Kick with attackers left leg out opponent right leg to force post with opponents right arm. 

Keeping both hands in same place on collar fabric lift both in parralel to touch bottom hand thumb up to opponent throat r  we day in choke position

Lean to right loop top arm over pushing with bottom arm to make space.  To get arm over.  Then fall to your left.  Completing the baseball bat style choke. 

If it fails you still have a sweep sideways to mount by inside hooking opponent left leg.