I just tried ChatGPT free with the prompt "There's a mate-in-two composed by Paul Morphy. What's the key move?". It searches and finds it immediately. But if I

I just tried ChatGPT free with the prompt "There's a mate-in-two composed by Paul Morphy. What's the key move?". It searches and finds it immediately. But if I ask it not to search the internet, its response is incoherent (syntactically valid English and knows the names of the chess pieces, but otherwise hallucinated).