Have you recommended a fantasy novel with a chess game as its theme?

It should be an old novel. It was about the world of elemental chess. The main character in the novel was a person who had not been seen by a mirror for three consecutive years. In the end, his teacher realized that the blank mirror was his code name. I only read the beginning. He remembered another scene where he did not speak for a year and watched his teacher play chess. In the end, there was a phenomenon of "overflow".
This novel should be relatively unpopular. Does anyone know the name?

Answer 1

"I recommend 'Chess Rules the World'. This book is a fantasy novel about a different world. It tells the story of the ultimate chess game, shattering the void. With chess as the theme, the original cultivation method made the readers exclaim in joy. I hope you like this fairy's recommendation. Muah ~😗