So, how quickly will a not orthodox played opening trip it up? I tried 1.Na3 Nc6 2.Nf3 d6 3.e4 d5 4.exd5 now ChatGPT made the illegal move 4...Nxd5. When challenged about it, it made up another illegal move: 4...exd5 gave nonsense explanations for why 4...Nxd5 is not a legal.