What was Bobby Fischer's actual chess strength during the 1992 re-match vs. Spassky? As title above, what was Bobby Fischer's actual chess strength during the 1992 re-match vs. Spassky, apart from all his already legendary past achievements?
From wikipedia:


  Fischer's score of 17½ out of 30 (counting draws) against Spassky, rated 2545 at the time, gave him a performance rating of 2645, which would have put him at No. 12 in the world on the July 1992 list.