What move? Who's turn is it? Declined or accepted? Garbage in, garbage out.

In some cases I would agree with this, but image model releases including this one are beginning to incorporate and market the thinking step. It is not a reach at this point to expect the model to take liberties in order to deliver a faithful and accurate representation of your request. A model could still be accurate while navigating your lack of specificity.

Kasparov vs Karpov ‘87 Olympiad. Move 6

What do you mean? Parent clearly describes the Queen's Gambit. 1.d4 d5 2.c4 There is no room for ambiguity here.

King Indian Defense would be a better prompt as Queen's Gambit can now refer to e.g. some scene from Netflix series.