Just had a peak at PGN Spy. It seems as if the program is for analyzing a collection of games, not just a single game.
You can use it for either. If you know how to use it, it is more useful than let's say Chess Analyse 2.6 or Arena 3.5, for finding players who pass off engine moves as their own.
christopher parsons where is the evidence that he beat a 2700 chess engine. try to remember, maybe write it down, assertions aren't evidence.
Go back a few pages in this thread and see my in depth analyses of one of his games. Let's give him the benefit of the doubt that he actually played game and we couldn't calculate a 3500 ELO if we wanted to, unless he doctored a pgn, played a take back game, or is the bot programmer I have ever heard of, the evidence is rather compelling that he did indeed play at a very good GM level, against a machine that could play substantially higher, if it had more than 10 secs to analyze between moves.