Professor Lucas Lepri shows how to recover guard or apply a triangle choke when the opponent moves from side control to north-south position to prevent Lucas' guard recovery. In this situation, Lucas keeps his elbows tight, bridges, and pushes in order to enter his knee and trap around the opponent's head with his other leg. He can then push the opponent away, spin, and establish grips to recover the open guard. Alternatively, Lucas can attack with the triangle by pulling with both hands on the same arm while pushing the opponent's hip with his foot and then locking his legs. To finish the attack, Lucas crosses the opponent's arm and immediately controls his posture until he is able to lock the triangle and apply the choke.