The Hungarian grandmaster Geza Maroczy died in 1951, but on some reports, his chess career didn't end there. He took about 34 years off, and then, with the help of a medium named Robert Rollans, played a game against Viktor Korchnoi that lasted until 1993. (He lost, but hey - he was rusty. You can replay the game here.)
Read the whole thing.
(Via The Chess Mind Blog.)