2000 reasons why we win against a higher rated

1 the higher rated is already a grandfather

2 the higher rated had a glass of wine

3 the higher rated has fallen into sense pleasure 

8 The higher rated sacrificed da rooooooooook just to impress levy but game review said it was a blunder

9 The high rated was overconfident

10 the higher rated player sacrificed da rooooooooook and he also sacrificed da other rooooooook to impress Levy even more but game review thought it was so bad that it invented a new type of move: the mega blunder

11. The higher rated player sacrifices da roooooooook three times and the judge makes them lose for no reason.

Three times? There are 2 rooks right?

yes

but maybe one time you did not accept the sacrifice and then he sacrificed the same rook again