How To Defeat a Stronger Opponent

Greg Serper gives his advice on playing a stronger opponent in articles at Chessdotcom.

"Most chess players face this problem pretty frequently: what should I do against a much stronger opponent? And here when we say "a much stronger opponent" , we talk about somebody who is at least 300-400 rating points higher. Let's start from major mistakes in this situation."  Part 1    Part 2