Zarrow shuffle
Sleight of hand technique
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Zarrow shuffle is a sleight of hand technique that gives the appearance of being a normal riffle shuffle, but in fact leaves the cards in exactly the same order. This is an example of a false shuffle. It was invented by magician Herb Zarrow c. 1940.[1] A Zarrow shuffle works by taking one half of the intermixed cards, and separating them under the cover of the top card.[2]