He didn’t like playing the open Sicilian. He moved his pieces quite fast, while his opponent was deciding where he wanted to play.
Knowledge and theory are very important aspects of chess, especially at the beginning of a game. He played chess as if he was just repeating the moves that were in a book.
All the way through until the middle game, white was at a severe disadvantage. This disadvantage started in the opponent's opening and continued throughout the entire game.
We now reached the end game, and not before long his opponent resigned.
He had absolutely no chance.
After all, our protagonist was at the grandmaster level. It was indoctrinated into him.
What made the game interesting enough to write about, was how it was played. The man played not particularly interested in checkmate, but more for eating material.
It was a small sign showing his greed.
His senseless, unquenchable amount of greed.