Elon Musk is looking for a checkmate in his latest online feud.

It began on Thursday, when the billionaire wrote that the number of chess moves that aren’t “utterly stupid” is small and that “chess will be fully solved one day.”

A challenger then emerged: the online gaming site Chess.com.

The brand reposted Musk’s response, calling it a “skill issue.” Musk replied that chess was hard for humans but easy for computers, and reiterated his point that chess would be “fully solved” by AI.

“Between now and then, or even after, have fun,” Musk wrote. “People enjoy many games/sports where machines are vastly better.”

Chess.com once again reposted Musk’s…