Crossing Realms?

Only on the chessboard did his advancement prove to be the most significant, surpassing his understanding of all things on the steps of transformations.

Indeed, his guess was correct.

In the mural, an elderly man with red hair walked out, startling everyone.

"Little folks, don't be afraid. This old man has been gone for who knows how many years," the old man said with a somewhat rough face. His skin was red, and his belly, just like when playing chess, was round.

Compared to the two before him, this First True King was more amiable.

Swoosh!

A chessboard soared into the air and appeared in front of everyone, with a sentence inscribed above.

"I am the founder of the Three Kings Court. Forget about my name; it's just a pseudonym. You can call me 'Grandmaster.' I have enjoyed watching and playing chess all my life. Becoming my successor is quite boring, so don't regret it!"