[header] How to perform the guillotine choke [title] Get your opponent's head down. [step] Wait till your opponent makes a move toward your legs to grab their head. Or if they have their head slightly bent toward you, reach out and pull their head down by clasping your hands behind their neck and pulling down. 
Get their head at the level of your chest, with their face toward the ground. [substeps] Wait for any time your opponent comes toward you with their head toward the outside of your body.