Comment by rmorey

That's entirely my point: both your kids and ChessGPT know the rules, but still don't play very strongly. You say they "don’t know much more than how the pieces move" but that's exactly what the rules are, how the pieces are allowed to move, given the sequence of moves that have come before (i.e the state of the board.) I'm saying ChessGPT is a poor player, and didn't learn much high level play. But it definitely learned the rules!