It occurred after Black's 27th (...Bg4-e6) in the second match game Fischer-Reshevsky, New York 1961. I reproduce the passage as exactly as I can, hence my use of descriptive notation:
What did Fischer mean by Right, Mr Thomas?
That does it! Once this Bishop is gone, White has a field day.
"Why didn't White play 28. N-Q2. . . ? So far as I can see Black can then resign. Or am I missing something?" (A.R.B. Thomas in a letter to Chess) Right, Mr Thomas!
Did he mean "you are correct, Mr Thomas, it's a winning move"? (It is, of course.) If so, why did he append an exclamation mark to the move he did play, which while it also wins, does so more slowly?
Did he mean "right, Mr Thomas, you are indeed missing something"? If so, what did he have in mind?
Did he mean that Mr Thomas was missing something, but that it wasn't something on the board - that he (Fischer) had a reason for playing the way he did and that Thomas missed it?
This puzzled me a lot as a kid, when I read Fischer's great book incessantly. A generation before computers, I satisfied myself many times that the knight move won immediately - as I'm sure Thomas, a generation earlier still, must have done before writing.
So I wondered, if I had understood the chess, if I had not misunderstood the English, and I pored over it to see if there was some hidden message there, some joke, or something so obvious it was too obvious for me to see. But I never found it.
So still, all these years on, I do not understand what he meant. Fischer seems confident in his meaning - Right, Mr Thomas! with an exclamation mark. But what? And why the exclamation mark after 28. RxB?
What did Fischer mean?