Originally posted by randolph 3. a very strong player taking hours on each move unassisted by an engine
If the "strong player" is rated about 2600+ FIDE, then I agree with you. I think that a strong computer would win a majority of the games against most IM's, even if the IM took three hours or more per move. (Assuming that the computer was permitted to spend an average of at least fifteen minutes per move.)