A recent discussion on Metafilter of Fitch Cheney’s Five Card Trick. Other updated links of interest are a discussion on Colm Mulcahy’s site, a brief mention on Anne Schilling’s site and a very interesting but mathematically bias PDF paper.

Colm also mentions that a version with 4 cards can be found in the recently published Puzzlers Tribute and there is a website to do the 4 card version online.

Lastly I blogged a couple of links a while back, one to the 5 Card version and a detailed expose of the method.