The guy using the scissor half is on his side, with his top leg across your body as in a scissor sweep, and his bottom leg hooked inside-to-out on your inside leg. The guard works with the top leg blocking a pass to the outside, and the lower leg blocking a pass to the inside.
Jamal Patterson is dealing with Eduardo Telles use of this guard. The one time Patterson is able to pass is when he pivots his trapped knee in and then out. That move frees the lower leg trap, opening immediately the path to the inside and possibly to side control.
