David v Goliath

We all like to defeat a more highly rated opponent.
What are the main reasons for stronger players falling prey to a lower rated opponent ?

For example:
Josh Waitzkin was a youth-chess Goliath. He won six national scholastic and junior championships. His opponent in this game was rated some 300 points below him - David v Goliath Chess (Andrew Soltis 2016)

😉  Play  the game

👍  Explore   some more games from Andrew Soltis' book