The opening was the Ruy Lopez Cozio variation I believe
A draw I had against a Grand Master on here
In all honesty, I got scared. Lol. I got scared and began overthinking. That is when I offered the draw. When I ran the analysis, it said I could have checkmated him in 5 moves when he moved his king to f8

how to checkmate a grandmaster in 9 moves as a -1400 (other account game link) https://www.chess.com/live/game/1851998489?

Yes i did use that opening in my game with him, the thing to remember is masters are human and succomb to pressure and mistakes..though not often .. but never give in!
Those at the top also know how to use those secrets and use the skills they have developed to be able to succeed

The further you advance in skill the more esoteric you realise the game is.(Specialist secret knowledge. It’s the same principle that runs the entire world. Those at the top have acquired the secrets to get there and stay there...
The law is a prime example
there isn't such a thing called secret in chess play. if there were really secrets to it you wouldn't see grand masters spending their whole lifetime to become gms, it really takes many years to acquire good skills to get you in there. its all about patience dedication and hard work
This chess game is a game I played against a Grand Master ranked chess player called David Morkosyan. Rating of 2399 and from Russia. He is a very strong chess player and it was an honor to play him. After a huge blunder I made in the middle game, I managed to turn it around and wind up getting a draw against him. Could I have won? Maybe. We'll see.