It didn't. The article is nonsense. He probably primed it beforehand by talking about Sudoku, or it may have just chanced onto something similar. When I ask it to code Sumplete, it creates a "math-based game in which players have to solve a sequence of simple addition problems within a limited time to progress to the next level."

It says:

> “Can you code a game called Sumplete?” Despite protesting about its inability to make games earlier, ChatGPT immediately started spitting out fully formed HTML, Javascript, and CSS code. Sure enough, it had once again created a version of Tait’s game – only this time, we never discussed what it actually was beforehand.

I guess "a version of Tait's game" leaves some wriggle room about exactly what it did.

The article seems to leave for itself wiggle room in several such places, suggesting the author had an agenda. Likely ideological rejection of AI as intelligence.