"Red Nist is a formidable cartomagic strategist. In his routines, every move is justified. And the magical principles involved are baffling. Who's going to find them?" - Jean-Pierre Hornecker
The spectator takes the deck, chooses a card and loses it himself in the pack. He shuffles the deck to lose the card. Up to this point, you haven't touched the cards. You then take the deck and distribute the entire pack into two piles. Without any manipulation, the cards can be turned over immediately: all the reds have been separated from the blacks, except for one - the spectator's card!
With...