On Wednesday, Elon Musk’s brain-chip startup Neuralink livestreamed its first patient implanted with a chip using his mind to play online chess.

Noland Arbaugh, the 29-year-old patient who was paralyzed below the shoulder after a diving accident, played chess on his laptop and moved the cursor using the Neuralink device. The implant seeks to enable people to control a computer cursor or keyboard using only their thoughts.

“Livestream of Neuralink demonstrating “Telepathy” – controlling a computer and playing video games just by thinking,” Musk said in a post on X.

Arbaugh had received an implant from the company in January and could control a computer mouse using his thoughts, Musk said last month. “The surgery was super easy,” Arbaugh said, referring to the implant procedure. “I literally was released from the hospital a day later. I have no cognitive impairments.”

Kip Ludwig, former program director for neural engineering at the U.S. National Institutes of Health, said that it is still in the very early days post-implantation, and there is a lot of learning on both the Neuralink side and the subject’s side to maximize the amount of information for control that can be achieved.

Ludwig further said it was a positive development for the patient that they have been able to interface with a computer in a way they were not able to before the implant. “It’s certainly a good starting point,” he added.